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Thyristor speed control unit
73532
Compact static converter for setting and performing open and closed loop control of DC voltage and current. In addition to making a multitude of experiments possible, it can also be used to control the speed of a shunt wound machine from 0.1 kW to 2.6 kW with cascade current control in four-quadrant operation.
Features
- Mains switch and delayed response main contactor for armature and exciter voltages
- Separate fuses, which can be serviced externally, for excitation, the electronic components and three-phase current
- Exciter voltage output: 220 V, 1 A
- Thyristor power circuit with two fully controlled B6 bridges for
circulating current-free four-quadrant operation, nominal data (UL1N = 90 V): 0...230 V, 12 A, Indication of the active static converter via 2 LEDs - Complete electrical isolation between power circuit and control and regulating unit
- Extensive fault monitoring with signalling and switch-off. Activation for phase-failure, rotating field fault, machine or equipment overheating and time limit
- Control and regulating electronics with extensive indication, setting and measuring possibilities
- Potentiometer for the setpoint encoder with changeover switch for single quadrant and four quadrant operation
- Run-up integrator with potentiometer for the run-up time: 0.1...100 V/s
- Speed controller with summing point:
Two inverting input and one non-inverting input - Variable gain VN = 1...10 for actual speed value
- Coarse and fine adjustment of the proportional action coefficient:
KPN = 0.5...5/5...50 - Coarse and fine adjustment of the reset time:
TNN = 0.1 s...1 s/1 s...10 s
I controller can be switched off - Overdrive indication via LED
- Both converters I and II have a potentiometer for current limitation
Imax I = 0...12 A
Imax II = 0...12 A - Instantaneous comparator with adjustable hysteresis
- Absolute-value generator with measurement socket for control signal INVert
- Adaptive current controller with summing point:
Two inverting inputs and one non-inverting input
Recognition of intermittent current with LED display and measurement socket for the control signal STL (intermittent current)
Reduction of the reset time to 1/10, when intermittent current is present, can be switched off
Coarse and fine adjustment of the proportional action coefficient:
KPI = 0.05...0.5/0.25...2.5
Coarse and fine adjustment of the reset time:
TNI = 10 ms...100 ms/100 ms...1 s
I controller can be switched off
Overdrive indication with LED - Control angle limiter with the following setting options: Rectifier stability limit 0°...80°
Inverter stability limit 180°...100° -
Switching logic with measurement sockets for the control signals and with a control input STOP
-
Four-quadrant indication with 4 LEDs
- Current measurement with current converters
- The control set provides six double-pulse trains which are switched through to the thyristors of the rectifiers I or II via 12 gate pulse transformers
Supply voltage
- Control unit: 230 V, 50 Hz
- Power circuit: via external three-phase transformer
3 x 45/90 V, 50 Hz (735 32)
- Mains lead with shockproof plug