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Low-Voltage Power Module For Motor Control User`s Manual

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1. Motor Control I O Board Micro Board T A 3 J1 FX8C 100P SV4 Header Power Se P1 FX8C 100S SV5 Receptacle 1 Jack T 1 a Sw 1 1 i 1 d Let 1 1 1 i Reset Clock 1 TrimPot 1 and 2 I 1 Speed Optional connections 1 E 1 1 1 Adjust 1 1 1 1 1 1 1 2g I 1 1 C seg Lo c 1 20 a 2 l 5 pins 5 be n 8 i a 9c 1 1 5 S 1 g 18 5 A eis P E g ge z o 1 25 2090 icro Ol zo 8 E 88 controllers EE 1 TE LEDO ES 1 5 i S go 1 9 96 2 7 gt 1 I gt O 5 2 E i E S KO pins 5 3 sb 4 ES pi I MES aa pee ee 1 8 82 om 74 Y 1 ow H 1 i E gt Reset Clock m 1 a i i Optional connections e E 1 vy a A coe 1 92 FX8C 100P SV4 Header i P2 FX8C 100S SV5 Receptacle Y Approx 0 75 Inch 4 Inches gt 2 Inches gt The micro board connects to the motor control I O board via two 100 pin connectors All MCU signals connect to the board hardware or prototype area The I O board interfaces between the motor control power module and the microboard containing the microcontroller 16 User s Manual U18052
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4. PW Phase U CMPV PW Phase V CMPW PW Phase W After the PW PW and CMPW PW signals pass through the digital opto isolation cir cuits they become CMPU CMPV and CMPW respectively and connect to the MCU s interrupt inputs User s Manual U18052EU1V1UMEO 29 Chapter 3 Appendix 3 5 Current Sense and MCU Interface Current measurement current limiting and over current sensing are often critical to the operation of motor control systems Control feedback loops use measured current values to regulate a motor s mechanical output torque Current limitation prevents the current in the motor windings from exceeding the set limits while over current sensing triggers a fast disabling of the MCU PWM driving pins as well as a total shut down of the power stage The low voltage power module employs low side current sense circuits to implement all of these capabilities Figure 3 5 Current Sense Circuit 5PW Low side H Bridge VCC 5PW 100K I R4 IU Phase U Current IU PW IV Phase V Current IW Phase W Current R sense 0 05 Ohms ISHUNT R sense 0 05 Ohms GND PW The diagram shown above is for Phase U current sensing The same circuit is used for sensing Phase V Phase W and ISHUNT currents The potentiometer allows you to adjust the gain of the amplifier Phase voltages IU IV and IW are very small signals typically 10 to 100 mV Resistors R4 and R5 center the amplifier s output
5. 1 20 2 3 On Board Components 21 2 3 1 40 pin ribbon cable header 22 2 3 2 3 pin terminal block 23 2 9 8 Current sense output connections 24 2 3 4 Phase voltage sense 24 Chapters Appendix o ete Ee RE 25 31 Digital Signal Isolation 25 3 2 Analog SignalIsolation 26 3 3 Note on Analog Signal 28 3 4 Back EMF Zero Cross Detection Comparator 29 3 5 Current Sense and MCU Interface 30 3 6 Over Current Protection 31 3 7 Safety Shut Down 32 Chapter 4 Schematics mc ta Eh Be EE Gema Pee 35 User s Manual U18052EU1V1UMEO 9 10 User s Manual U18052EU1V1UMEO Figure 1 1 Figure 1 2 Figure 1 3 Figure 2 1 Figure 2 2 Figure 2 3 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 List of Figures Low Voltage Motor Control Power Module 15 Development Boards for Motor Control 16 Develo
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7. current sense at Phase W Connect SB17 Use optional analog opto isolator to connect PW to ANI IV Connect SB19 Connect SB20 IV PW connects directly to ANI1 IV Use optional analog opto isolator to connect IW PW to ANI2 IW Connect SB21 IW PW connects directly to 2 IW SB21 and SB23 ISHUNT PW to ISHUNT Connect SB21 Use optional analog opto isolator to connect ISHUNT PW to 5 ISHUNT Connect SB23 Bypass analog opto isolator Phase U voltage sense Connect SB13 Analog opto isolator output to ANIG SPARE Open SB13 Analog opto isolator output to V U only Phase V voltage sense Connect SB14 Analog opto isolator output to ANI7 TMP Open SB14 Analog opto isolator output to V V only Phase W voltage sense Connect SB15 Analog opto isolator output to ANI3 TEMP Open SB15 Analog opto isolator output to V W only SB24 and SB25 Current sense by 21325 low side current sense Connect SB24 Disable motor over current sense by IR2123S Connect SB25 Use IR2132S motor over current sense feature SB26 and SB27 PX TRIP signal to MCU Connect SB26 Use 5 ISHUNT to PX TRIP Connect SB27 Use FAULT_B generated by IR2132S to PX ITRIP User s Manual U18052EU1V1UMEO 23 Chapter 2 Specifications 2 3 3 Current sense output connections The IU PW IV PW and IW PW current sense outputs connect
8. parties by or arising from the use of NEC Electronics products listed in this document or any other liability arising from the use of such products No license express implied or otherwise is granted under any patents copyrights or other intellectual property rights of NEC Electronics or others Descriptions of circuits software and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples The incorporation of these circuits software and information in the design of a customer s equipment shall be done under the full responsibility of the customer NEC Electronics assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits software and information While NEC Electronics endeavors to enhance the quality reliability and safety of NEC Electronics products customers agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely To minimize risks of damage to property or injury including death to persons arising from defects in NEC Electronics products customers must incorporate sufficient safety measures in their design such as redundancy fire containment and anti failure features NEC Electronics products are classified into the following three quality grades Standard Special and Specific The Specific quality grade applies only to NEC Electronics products develo
9. to the midpoint of the supply voltage 30 Users Manual U18052EU1V1UMEO Chapter 3 Appendix 3 6 Over Current Protection The power module s ISHUNT current detect circuit detects the voltage level at the low side of a motor s windings The ISHUNT voltage is a function of the current passing through a sense resistor The ISHUNT current detect signal becomes ANI5 ISHUNT after it is amplified by Op amp U20 and connects to an MCU A D converter input through the 40 pin connector on the MC I O Board The MCU software can monitor the A D converter input and take appropriate current limiting or soft shut down action if the current exceeds a set limit For a fast hardware based shutdown use the on board comparator U19 as shown below If 5 ISHUNT exceeds the threshold value preset by the 10K TrimPot the comparator output sets the PX ITRIP signal which is input to the MCU hardware shutdown pin Upon receiving this input signal the MCU immediately switches all six PWM outputs to a high impedance state disabling the motor drive Figure 3 6 Trip Circuit for Hardware Shutdown VCC 5V 1K 5 ISHUNT 5K GND DC 10K TrimPot GND As an extra protection against motor over current due to a locked rotor for example the current sens ing signal ISHUNT also connects to the over current sensing circuit of the IR2132S driver IC With R127 20K and R128 10K the driver will shut down the outputs to the power
10. 17 and remove solder blobs SB18 SB23 and jumpers JP2 JP11 28 Users Manual U18052EU1V1UMEO Chapter 3 Appendix 3 4 Back EMF Zero Cross Detection Comparator The low voltage power module provides back EMF comparators for sensorless motor control Back EMF is a voltage induced in a motor s stator windings by the permanent magnet rotor During each of the six commutation periods in trapezoidal drives only two stator windings are energized at a time leaving the third one floating The back EMF induced in this floating winding can be detected and used to determine the rotor position More precisely the zero crossing point of the back EMF signal is detected The low voltage power mod ule includes three comparators for this task configured as shown below The back EMF signal from each motor phase passes through a resistor divider and is then compared with a virtual neutral point created by connecting three resistors together see the figure With this configuration the virtual neu tral point potential is at half the DC bus voltage the threshold level at which the comparator output changes from Low to High and vice versa The back EMF signal is close to a sinusoidal wave with zero value at half the DC bus voltage The com parator circuit compares the signal amplitude with the virtual neutral point and at zero crossing the comparator output changes state Figure 3 4 Back EMF Comparator Circuit Virtual Neutral Point 5PW
11. 5 40 10 Asia amp Oceania NEC Electronics China Co Ltd 7th Floor Quantum Plaza No 27 ZhiChunLu Haidian District Beijing 100083 P R China Tel 010 8235 1155 http www cn necel com NEC Electronics Shanghai Ltd Room 2509 2510 Bank of China Tower 200 Yincheng Road Central Pudong New Area Shanghai P R China P C 200120 Tel 021 5888 5400 http www cn necel com NEC Electronics Hong Kong Ltd 12 F Cityplaza 4 12 Taikoo Wan Road Hong Kong Tel 2886 9318 http www hk necel com Seoul Branch 11F Samik Lavied or Bldg 720 2 Yeoksam Dong Kangnam Ku Seoul 135 080 Korea Tel 02 558 3737 NEC Electronics Taiwan Ltd No 363 Fu Shing North Road Taipei Taiwan R O C Tel 02 8175 9600 http www tw necel com NEC Electronics Singapore Pte Ltd 238A Thomson Road 12 08 Novena Square Singapore 307684 Tel 6253 8311 http www sg necel com G06 8A User s Manual U18052EU1V1UMEO 6 User s Manual U18052EU1V1UMEO Readers Purpose Organization Legend Preface This manual is intented for users who want to understand the functions of the low voltage power module for motor control This manual presents the hardware manual of the low voltage power module for motor control This system specification describes the following sections Inverter module IGBT module Opto isolation Power supplies User connections Symbols and notation are used as fo
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13. EC Electronics products means any product developed or manufactured by or for NEC Electronics as defined above M8E 02 11 1 User s Manual U18052EU1V1UMEO For further information please contact NEC Electronics Corporation 1753 Shimonumabe Nakahara ku Kawasaki Kanagawa 211 8668 Japan Tel 044 435 5111 http www necel com America NEC Electronics America Inc 2880 Scott Blvd Santa Clara CA 95050 2554 U S A Tel 408 588 6000 800 366 9782 http www am necel com Europe NEC Electronics Europe GmbH Arcadiastrasse 10 40472 D sseldorf Germany Tel 0211 65030 http www eu necel com Hanover Office Podbielskistrasse 166 B 30177 Hannover Tel 0 511 33 40 2 0 Munich Office Werner Eckert Strasse 9 81829 M nchen Tel 0 89 92 10 03 0 Stuttgart Office Industriestrasse 3 70565 Stuttgart Tel 0 711 99 01 0 0 United Kingdom Branch Cygnus House Sunrise Parkway Linford Wood Milton Keynes MK14 6NP U K Tel 01908 691 133 Succursale Francaise 9 rue Paul Dautier B P 52180 78142 Velizy Villacoublay C dex France Tel 01 3067 5800 Sucursal en Espa a Juan Esplandiu 15 28007 Madrid Spain Tel 091 504 2787 Tyskland Filial Centrum Entrance S 7th floor 18322 T by Sweden Tel 08 638 72 00 Filiale Italiana Via Fabio Filzi 25 A 20124 Milano Italy Tel 02 667541 Branch The Netherlands Steijgerweg 6 5616 HS Eindhoven The Netherlands Tel 040 26
14. EU1V1UMEO Chapter1 Introduction 1 2 Low Voltage Power Module Connection to Motor Control I O Board Figure 1 3 Development Board Connections VIN PWR Motor Control Low Voltage Power Module Motor Control I O Board Back EMF Zero Cross Detection Optional 15V 1A TrimPot Bi 1 1 g E d 1 2 i 1 Speed E d 1 i 1 Adjust 3 2 8 fz EE gt 3 p Bo c 1 v 1 g 52 1 5 1 ail 5 8 Sl 8 1 9 zu 2 o 2 i Bg 5 50 HE a m Sess oui E 5 gt gt 1 Soa 1 5 E L L i EA 581 s 1 oe gt I 1 4 co i 1 5 t FON 8 LEDO 58 i N 5 a 8 1 1 c Low Side gu DLE 1 Su 1 4 z zc Current Sensing L aS g Li 5 LED1 S 25 i ton T SS D5 om 1 1 1 9 I 1 i oz 1 58 i N 1 I LED2 o 1 1 Phase Voltage S ea L Sensing I 42 FX8C 100P SV4 Header LED3 i HALL Sensor Signals 4 Inches 0 75 Inch 5 58 The low voltage motor control power module connects to the I O board through a 40 pin ribbon cable This cable carries pulse width modulation PWM signals from the MCU as well as motor control and sensing signals to the MCU all of these signals pass t
15. MOSFETS if the current exceeds 3 3A User s Manual U18052EU1V1UMEO 31 Chapter 3 Appendix 3 7 Safety Shut Down Whether based on detection of an over current limit ISHUNT voltage or other safety criteria the MCU may shut down the power stage by issuing the TRIP signal as shown below When the TRIP signal goes High Q2 turns off turning off Q1 and thus turning off power to the power MOSFETs Figure 3 7 Safety Shutdown Circuit VIN Main Power Select E Cc FIPW 2 1501 10K VCC_PWFET Power to IRFR9024 927 Power MOSFET DPAK AA PVCC PFET 4 As described above the power module includes an IR2132S 3 phase bridge driver for the power MOSFETS drive and this components over current detection circuit can also monitor the motor over current through the ISHUNT signal if SB24 is connected and SB25 is open When ISHUNT exceeds the preset level the bridge driver shuts down its outputs and sets a flag on its FAULT output pin You can select the FAULT B signal to connect to PX ITRIP as an option by connecting solder blob SB27 and opening SB26 at the output of U19 32 Users Manual U18052EU1V1UMEO Chapter 3 Appendix Figure 3 8 Safety Shutdown Selection Circuit C101 2200pF 2 8 ANIS IGHUNT PX ITRIP 2 User s Manual U18052EU1V1UMEO 33 4 User s Manual U18052EU1V1UMEO Chapter 4 Schematics la lt gt ep c 2 HAS8QSZILO
16. NEC User s Manual Low Voltage Power Module For Motor Control Document No U18052EU1V1UMEO Date Published August 2006 NEC Electronics Corporation 2006 Printed in Germany CAUTION This is a Test and Measurement equipment with possibility to be significantly altered by user through hardware enhancements modifications and or test or application software Thus with respect to Council Directive 89 336 EEC Directive on compliance with the EMC protection requirements this equipment has no autonomous function Consequently this equipment is not marked by the CE symbol EEDT ST 0005 10 Redemption of Waste Electrical and Electronic Equipment WEEE in accordance with legal regulations applicable in the European Union only This equipment including all accessories is not intended for household use After use the equipment cannot be disposed of as household waste NEC Electronics Europe GmbH offers to take back the equipment All you need to do is register at www eu necel com weee All other product brand or trade names used in this pamphlet are the trademarks or registered trademarks of their respective owners Product specifications are subject to change without notice To ensure that you have the latest product data please contact your local NEC Electronics sales office User s Manual U18052EU1V1UMEO NOTES FOR CMOS DEVICES VOLTAGE APPLICATION WAVEFORM AT INPUT PIN Waveform distortion due to input noise o
17. VIN R2 R1 An adjustable gain is achieved by using a potentiometer in series with R2 26 Users Manual U18052EU1V1UMEO Chapter 3 Appendix The power module combines the resistor at the output side R2 with a potentiometer so that you can adjust the R2 R1 gain Combined R2 value allows a gain adjustment of R2 R1 Consider for example the phase voltage detect circuit diagram shown below Figure 3 3 Adjustable Analog Isolation Circuit cC BPW C24 0 1uF o Potentiometer R59 on the output side allows you to adjust the amplifier gain This adjustability is ticularly convenient for small input voltages The power module implements a number of other gain adjustment potentiometers Phase voltage detect circuit Phase U generating V U signal R59 Phase V generating V V signal R65 Phase W generating V W signal R71 Current sense outputs to MCU A D inputs through analog isolation Phase U current sense IU PW R115 Phase V current sense IV PW R116 Phase W current sense IW PW R123 SHUNT current sense ISHUNT PW R124 User s Manual U18052EU1V1UMEO 27 Chapter 3 Appendix 3 3 Note on Analog Signal Isolation By default analog signal isolators for low side current sensing ISO14 1SO17 are optional and the low voltage power module does not include them The module does provide locations for these analog iso lators you can populate these locations with suitable componen
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19. control and motor feedback signals between the power module and the I O board The signals on the cable header connect to the MCU after passing through isolation and signal conditioning circuits 22 7 8 3556 78 5 Figure 2 2 40 Header Signals 8 IU 8 ANI IV 8 ANI2 IW 5 ISHUNT 5 ANIT_TMP CANTE SPARE 5 6 CMPU 6 CMPV 6 CMPW 1 TRIP 3 3 HIV 3 3 LO U 3 LO V 3 LOW 1 VCC 15v 5 v U GND DC 1 3 5 6 7 8 5 SPARE 0 5 V W SPARE 1 10uF GND_DC GND DC 1 3 5 6 7 8 User s Manual U18052EU1V1UMEO 2 3 2 3 pin terminal block Chapter 2 Specifications A 3 pin terminal block connects Phase U Phase V and Phase W signals to the PMAC motor However other signals from the motor such as those from the Hall sensor or shaft encoder can be con nected directly to the MC I O board J5 and from there to the CPU Solder Blob SB16 and SB18 Figure 2 3 3 Terminal Signals 4 5 PHASE U 4 5 PHASE V 4 5 PHASE 4 J3 IA 5 3P TERMBLK BLDC MOTOR Table 2 5 Solder Blob Connections Function IU_PW to ANIO_IU current sense at Phase U SB Connection Connect SB16 Description Use optional analog opto isolator to connect IU PW to ANIO_IU Connect SB18 IU PW connects directly to ANIO IU SB17 and SB19 SB20 and SB22 PW to ANH IV current sense at Phase V IW PW to ANI2 IW
20. ect power on off sequence must be judged separately for each device and according to related specifications governing the device INPUT OF SIGNAL DURING POWER OFF STATE Do not input signals or an I O pull up power supply while the device is not powered The current injection that results from input of such a signal or I O pull up power supply may cause malfunction and the abnormal current that passes in the device at this time may cause degradation of internal elements Input of signals during the power off state must be judged separately for each device and according to related specifications governing the device User s Manual U18052EU1V1UMEO The information in this document is current as of August 2006 The information is subject to change without notice For actual design in refer to the latest publications of NEC Electronics data sheets or data books etc for the most up to date specifications of NEC Electronics products Not all products and or types are available in every country Please check with an NEC Electronics sales representative for availability and additional information No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Electronics NEC Electronics assumes no responsibility for any errors that may appear in this document NEC Electronics does not assume any liability for infringement of patents copyrights or other intellectual property rights of third
21. hrough the I O board When Hall sensors are used connect their signal lines directly to the terminal block J5 on the I O board The low voltage motor control power module has its own power terminals It is best to use these termi nals although you can supply the module with up to 15V 2A power through the I O board Use only one of these methods of supplying power as described in sections 3 3 1 and 3 3 2 of this manual User s Manual U18052EU1V1UMEO 17 Chapter 1 1 3 Signal Definitions Category System power Table 1 1 Signal Name VCC 15V Introduction 40 Pin Header Signals Signal Description Power input to MC I O board 5 Regulated 5V power PWM signals 0 HI V high side FET drive LO U LO V LO W low side FET drive PWM signals from CPU Back EMF comparator CMPU CMPV CMPW Back EMF comparator signals from power mod ule connected to interrupt inputs of CPU Current sense signals ANIO 10 ANI1 IV ANI2 IW ISHUNT Motor phase current low side current detection Motor shunt current low side current detection Connected to A D converter inputs of CPU Safety control signals PX ITRIP Over current detection signal from power module Connected to Port X of CPU for further action TRIP CPU generated signal Turn off power for power MOSFETs Phase voltage detection V U V V V W Motor phase voltage detection signal Connected to A D c
22. ic electricity Semiconductor devices must be stored and transported in an anti static container static shielding bag or conductive material All test and measurement tools including work benches and floors should be grounded The operator should be grounded using a wrist strap Semiconductor devices must not be touched with bare hands Similar precautions need to be taken for PW boards with mounted semiconductor devices STATUS BEFORE INITIALIZATION Power on does not necessarily define the initial status of a MOS device Immediately after the power source is turned ON devices with reset functions have not yet been initialized Hence power on does not guarantee output pin levels I O settings or contents of registers A device is not initialized until the reset signal is received A reset operation must be executed immediately after power on for devices with reset functions POWER ON OFF SEQUENCE In the case of a device that uses different power supplies for the internal operation and external interface as a rule switch on the external power supply after switching on the internal power supply When switching the power supply off as a rule switch off the external power supply and then the internal power supply Use of the reverse power on off sequences may result in the application of an overvoltage to the internal elements of the device causing malfunction and degradation of internal elements due to the passage of an abnormal current The corr
23. llows Weight in data notation Left is high order column right is low order column Active low notation XXX pin or signal name is over scored or xxx slash before signal name Memory map address High order at high stage and low order at low stage Note Explanation of Note in the text Caution deserving extra attention Remark Supplementary explanation to the text Numeric notation Binary XXXX or XXXB Decimal Hexadecimal XXXXH or Ox XXXX Prefixes representing powers of 2 address space memory capacity kilo 219 1024 M mega 220 1024 1 048 576 giga 290 1024 1 073 741 824 User s Manual U18052EU1V1UMEO 7 User s Manual U18052EU1V1UMEO Table of Contents Preface v Ex E A Eae Yir d Rc ERU a Ro 7 Chapter1 Introduction i voir rrr X e ees ERES 15 1 1 Micro Board Connection to Motor Control I O Board 16 1 2 Low Voltage Power Module Connection to Motor Control I O Board 17 1 3 Signal Definitions rere ben RE AER 18 Chapter2 5 a coca e Rr 19 2 1 Physical Placement of Components 20 2 2 Operating 20 2 2 1 Normal operation a RR RE Rer Eder ERR dea hx E 20 2 2 2 Debugging configuration
24. onverter inputs of CPU Power module temperature 18 7 TMP Power module temperature sense signal Connected to A D converter input of CPU User s Manual U18052EU1V1UMEO Chapter 2 Specifications The motor control low voltage power module has on board hardware for controlling and operating PMAC motors Low voltage power module specification System power Power jack up to 24 at 4A External power terminal up to 24 at 4A 15V from MC I O board ON OFF power switch 4A fast acting fuse Power select jumper 40 pin ribbon cable that carries signals to from motor control I O board terminal block Phase U Phase V and Phase W signal connections to PMAC motor terminals Opto coupler isolation that physically separates high and low voltage plane Digital opto isolators that isolate and couple digital signals Analog opto isolators signals isolate and couple analog signals Ground shorting jumpers high and low voltage GND plane shorting jumpers Connect two power planes when motor power is supplied from the MC I O board 15V Remove GND shorting jumpers when motor power is supplied from either the external power jack or the external power terminal Board size of 3 5 x 5 5 inches W x L User s Manual U18052EU1V1UMEO 19 Chapter 2 Specifications 2 1 Figure 2 1 Physical Placement of Components Power Module Layout
25. ped based on a customer designated quality assurance program for a specific application The recommended applications of an NEC Electronics product depend on its quality grade as indicated below Customers must check the quality grade of each NEC Electronics product before using it in a particular application Standard Computers office equipment communications equipment test and measurement equipment audio and visual equipment home electronic appliances machine tools personal electronic equipment and industrial robots Special Transportation equipment automobiles trains ships etc traffic control systems anti disaster Systems anti crime systems safety equipment and medical equipment not specifically designed for life support Specific Aircraft aerospace equipment submersible repeaters nuclear reactor control systems life support systems and medical equipment for life support etc The quality grade of NEC Electronics products is Standard unless otherwise expressly specified in NEC Electronics data sheets or data books etc If customers wish to use NEC Electronics products in applications not intended by NEC Electronics they must contact an NEC Electronics sales representative in advance to determine NEC Electronics willingness to support a given application Note 1 NEC Electronics as used in this statement means NEC Electronics Corporation and also includes its majority owned subsidiaries 2 N
26. pment Board Connections 17 Power Module 20 40 Pin Header Signals 22 3 Pin Terminal Signals circa eet ee d a ia ire e ta nni 23 Digital Isolation Circuit neam nnne nnne nenne nnne 25 Analog Isolation 26 Adjustable Analog Isolation Circuit enne 27 Back EMF Comparator Circuit eese nennen nnne nnns 29 Current Sense 30 Circuit for Hardware Shutdown 31 Safety Shutdown Circuit nana 32 Safety Shutdown Selection Circuit nana nana 33 User s Manual U18052EU1V1UMEO 11 12 User s Manual U18052EU1V1UMEO Table 1 1 Table 2 1 Table 2 2 Table 2 3 Table 2 4 Table 2 5 List of Tables 40 Pin Header Signals 18 Default Jumper Settings iesiri eeina aeia iaaiaee ia aeiia 20 Powell a e settee te lot ctii 21 Power Terminal Connections 21 Power Selection 21 Solder Blob nana 23 User s Manual U18052EU1V1UMEO 13 14 User s Manual U18052EU1V1UMEO Chapter 1 Introduction The low voltage motor control power module from NEC Electronics is designed to drive low voltage three phase permanent magnet asynchronous curren
27. r a reflected wave may cause malfunction If the input of the CMOS device stays in the area between MAX and MIN due to noise etc the device may malfunction Take care to prevent chattering noise from entering the device when the input level is fixed and also in the transition period when the input level passes through the area between MAX and MIN HANDLING OF UNUSED INPUT PINS Unconnected CMOS device inputs can be cause of malfunction If an input pin is unconnected it is possible that an internal input level may be generated due to noise etc causing malfunction CMOS devices behave differently than Bipolar or NMOS devices Input levels of CMOS devices must be fixed high or low by using pull up or pull down circuitry Each unused pin should be connected to or GND via a resistor if there is a possibility that it will be an output pin All handling related to unused pins must be judged separately for each device and according to related specifications governing the device PRECAUTION AGAINST ESD A strong electric field when exposed to a MOS device can cause destruction of the gate oxide and ultimately degrade the device operation Steps must be taken to stop generation of static electricity as much as possible and quickly dissipate it when it has occurred Environmental control must be adequate When it is dry a humidifier should be used It is recommended to avoid using insulators that easily build up stat
28. t PMAC motors such as brushless DC BLDC and permanent magnet sinusoidal motors PMSM The module contains a six transistor power MOSFET H bridge driver circuits optical isolation and feedback signal conditioning circuits Figure 1 1 Low Voltage Motor Control Power Module To evaluate a complete PMAC motor drive system you need three parts that are all available from NEC Electronics A micro board containing a motor control microcontroller A motor control I O board MC I O GENERAL board that interfaces between the micro board and the power module The low voltage power module containing the power MOSFETs By adding a low voltage PMAC motor and software packages that support various driving methods and control algorithms you can quickly explore the principals of three phase PMAC motor control as well as jump start your application development with minimum effort User s Manual U18052EU1V1UMEO 15 Chapter 1 Introduction 1 1 Micro Board Connection to Motor Control I O Board The micro board contains an NEC Electronics microcontroller that supports three phase motor control functions NEC Electronics offers a series of dedicated motor control microcontrollers ranging from 8 bit CISC type devices to high performance 32 bit RISC products Please contact your NEC Electronics America sales representative to obtain a list of available choices Figure 1 2 Development Boards for Motor Control
29. t has micro board attached 2 2 2 Debugging configuration The methods used to debug the motor controller depend on the micro board you use Consult your micro board user s manual for details 20 Users Manual U18052EU1V1UMEO Chapter 2 Specifications 2 3 On Board Components Table 2 2 Power Inputs Main power jack 24 VDC at 4A from user supplied wall mount power supplies J1RED J1Black External power input User supplied power input terminal two single jacks red and black Table 2 3 Power Terminal Connections Power Terminal Function Connections Description Power from user supplied external power J1RED J1BLK 5 6 and 7 8 15V coming from I O board 9 10 and 11 12 1 2 and 3 4 Power source select Power from main power jack J4 When selecting power from the motor control I O board you must set JP1 and JP12 as shown in the table Table 2 4 Power Selection Jumpers Jumper Function Jumper Setting Description From power module to 15V MC I O board From power module to 15PW for power module 15VDC power source select From MC I O board to power module 1 2 From power module to 5V MC I O board JP12 Mus poem 3 4 From power module to 5PW for power module 2 4 From MC I O board to power module User s Manual U18052EU1V1UMEO 21 Chapter 2 Specifications 2 3 4 40 pin ribbon cable header The 40 pin ribbon cable connects motor
30. the physical separation between input and output This galvanic isolation barrier provides isolation voltage protection up to approximately 2500V yet the output closely tracks the input signal The power module uses digital isolation for the following signals PWM signals from the MCU to the power module Back EMF zero cross comparator outputs to the MCU User s Manual U18052EU1V1UMEO 25 Chapter 3 Appendix 3 2 Analog Signal Isolation For analog signal isolation the power module provides a circuit that uses input photo detectors in a servo feedback loop The figure below shows this circuit with an Agilent HCNR201 300 device In this circuit op amps control the current to LEDs which provide a proportional amount of light to internal photodiodes The input feedback loop adjusts the LED current to reflect any changes in the input The output photodiode converts the LED light output into current which a voltage follower output amplifier then converts back into a suitable voltage The relationship between the input voltage VIN and output voltage VOUT is VOUT R2 R1 VIN e f R1 R2 then the output voltage closely follows the input voltage Figure 3 2 Analog Isolation Circuit Power Module Side CPU and Controller Side VCC 5PW OPA353NACT SOT 23 5 Vin 1 5VDC OPA353NACT SOT 23 5 Vout R2 100KQ Ri 1 HCNR201 300 SO 8P GND_PW GND_DC GND_DC Vour
31. to A D converter inputs through optional analog opto isolators or are bypassed 2 3 4 Phase voltage sense The phase voltage sense outputs connect to V U V V and V W Select these signals on the MC I O board and connect them to the MCU A D converter inputs if supported 5813 SB14 5815 provide optional connections to MCU A D converter inputs Note ANI3 TEMP signal through SB15 is not connected to the 40 pin MC I O Board connector J5 To connect the Phase W voltage sense output V W to ANI3 TEMP on the board use the single post J_ANI3 terminal on the power module Connect ANIS with a jumper wire to J5 8 on the board Make sure that no other signals are connected to J5 8 24 User s Manual U18052EU1V1UMEO Chapter 3 Appendix This section describes the power module s signals and functions as well as its circuit implementation 3 1 Digital Signal Isolation A PMAC motor requires the power MOSFET H bridge to switch bus voltages as high as 24 Vpc To turn on the high side MOSFETS their gate voltage has to be 10 to 15V higher than their source potential floating at half the DC bus voltage To prevent these high voltages from affecting the CPU and control ler a digital signal isolation circuit on the power module physically isolates the motor side signals from the signals on the CPU side Figure 3 1 Digital Isolation Circuit PWM Motor Side PWM CPU Side NEC PS9713 SOP 5P Opto couplers provide
32. ts if your application requires total sig nal isolation Most applications do not require such isolation because normal current levels are low and failures that would result in high currents are quite unlikely To see why consider that the power module provides two separate ground planes one for the 5VDC CPU side DC and one for the higher voltage motor side circuits By default these ground planes are connected together with jumper blocks J2 through J11 JP2 JP 11 and analog isola tors 15014 15017 are bypassed by solder blobs SB18 SB23 Low side current sensing by voltage drop measurements on two 0 05 ohm resistors is referenced to GND PWR A fast acting 4A fuse limits both the motor current and the current through the low side resistors In normal operating conditions when the motor draws less than 4A the voltage drop on the current sensing resistors is less than 400 mV and analog isolation is not necessary The maximum supply voltage for the power module is 24DC and this voltage can be present on the sensing resistor terminals if both upper and lower MOSFET transistors conduct at the same time or both fail Simultaneous conduction is prevented by the dedicated cross conduction prevention circuits inside the IR2132S driver IC and it is very unlikely that both high side and low side transistors will fail simultaneously If you do want to install analog signal isolators however populate module locations 15014 50

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