User manual - LD Didactic
Contents
1. frequency is active Pressing the button again or simply changing the frequency deactivates this mode 6 Button to activate the Step operation In this mode the rotating field position is set and can be shifted in 1 steps by turning the rotary encoder 12 in the forward or reverse direction LED indicates when the operating mode is active Mode is deactivated by pressing the button again 7 Button to select a sine or block shaped voltage modulation of the AC output voltage with LED to indicate the selection Instruction Sheet 725 721 8 Button for selection of AC 1 or three phase voltage 3 In the single phase operation voltage is only applied between U and N in the three phase operation sockets U V and W are active LED indicates the selected operating mode If this button is held pressed during power on the maximum line voltage in 3 mode is increased to 41 V 9 Button to change the phase sequence for selecting the field rotation direction LED indicates the rotation direction 10 Illuminated power switch 11 Rotary encoder for adjusting the frequency or position of the field set with the Step button 6 A clockwise turn increases the value while a counterclockwise turn reduces it 0 01 0 09 Hz in 0 01 Hz steps 0 1 0 9 Hz in 0 1 Hz steps 1 9 5 Hz in 0 5 Hz steps 10 99 Hz in 1 Hz steps 100 500 Hz in 5 Hz steps 12 Safety sockets for three phase or AC voltage In AC operation mode a m2. PHYSICS CHEMISTRY ENGINEERING BIOLOGY 09 13 W2010 Wel 56789 14 15 16 0 Design Both devices 725721 and 725721G_ have identical functionality The 725 721G is a portable desktop device complete with housing and ready for connection The 725 721 is a 19 rack panel version for fixed mounting in an appropriate rack and should be used for stationary operation 1 Safety notes LD DIDACTIC 725721 725721G Instruction Sheet Three phase Generator 2 Description This unit is a frequency converter based power supply to generate DC AC and three phase AC voltages 1 LED indicates overcurrent I gt gt LED indicates operating mode yellow Umax 3 14 V red Umax 3 24 V 2 Display with 3 7 segment modules indicates the frequency in the 0 01 Hz 500 Hz range the position in the 0 359 range the rotational speed R in the 1 999 rom and 1 00 x 1000 6 00 x 1000 rpm ranges 3 3 LEDs indicate the units of measurement corresponding to the values shown in the display 2 4 Display with three 7 segment modules to indicate the phase voltage of the AC or DC outputs In normal operation the rms voltage value for AC or three phase voltage is displayed If the DC voltage changes this value is displayed for a short time 5 Button to set the output frequency to the mains frequency Possible frequencies are either 50 Hz or 60 Hz selected automatically LED indicates when the fixed
3. aximum of 24 V can be drawn between N and the phase conductor U In 3 mode 24 V or 41 V can be obtained between the phase conductors U V W see point 8 and 14 V or 24 V between the phase conductor and N respectively The outputs are short circuit proof 13 Rotary encoder for setting the AC voltage Turning clockwise increases the value turning counterclockwise reduces it Pressing wheel inward against the front panel toggles voltage on and off with state indicated by LED 14 6 pin DIN socket for the rotor position sensor 727 812 If connected BLDC mode is automatically activated LED activated when rotor position sensor is connected The rotor position sensor only works with the ELM magnet rotor 563 19 or ELM 4 pole magnet rotor 563 191 manufactured after May 2012 In BLDC mode buttons 5 9 are deactivated 15 Rotary encoder for setting the DC voltage A clockwise turn increases voltage while turning counterclockwise reduces it Pressing the wheel inward against the front panel toggles the voltage on and off LED indicates the on off state 16 Safety sockets provide a maximum DC voltage of 15 V Positive is applied to the red socket negative is applied to the blue socket The outputs are short circuit proof 3 Usage The electronic three phase generator 725 721 or 725 721G enables the generation of variable frequency and variable amplitude small AC voltages and three phase AC voltages by means of PWM and DC voltages Two
4. different waveforms are available to simultaneously perform experiments in AC and three phase fields The electronic three phase generator is used for powering Electric Training Machines ELM in the geared towards Electrical Engineering and Automotive Technology A 2 7 2 2 Here it is meant for powering three phase AC and DC machines including the linear motor LD DIDACTIC GMBH by LD Didactic GmbH Leyboldstrasse 1 D 50354 H rth Phone 02233 604 0 Page 2 2 4 Technical data 3 HU rack panel equipped with illuminated power switch Output voltage AC 0 24 V Output voltage 37 3 x 0 24 V 41 V Output voltage DC 0 15 V All outputs are short circuit proof Voltage generation Sine or block commutated pulse width modulation Output current 1 5A Output frequency 10 mHz to 500 Hz adjustable Intermediate circuit voltage 96 V Outputs 6 x 4 mm safety sockets Mains connection 725721 5 pin connector system with leading protective contact wired and ready for connection 725721G IEC socket C13 Width 56 DU depth units Fax 02233 604 222 e mail info ld didactic de Printed in the Federal Republic of Germany Technical alterations reserved
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