SALIENT FEATURES :
AC Drive Demonstration Unit, 3??cyclo converter based is a versatile stand alone unit useful in the study & demonstration of the principle & working of an AC Drive for motor control. The circuit consists of firing pulse generator for generating F / 2, F / 3, F / 4 sequence to trigger the SCR?s, firing angle control & power circuit using SCR?s, 0.5 HP AC Motor load provision to connect CRO for isolation. It is housed in an elegant metal cabinet with a well spread intelligently designed circuit layout on front panel. Multi coloured test points are provided at various stages in the circuit to observe voltages & waveforms.
TECHANICAL SPECIFICATIONS
Input : 230V, 50Hz, AC 3?.
Output : Variable AC.
Circuity : Discrete trigger circuit using gates to generate F / 2, F / 3 & F / 4 Sequence.
Power Circuit : Using SCR?s of 1200V / 25A rating.
V / F Ratio : Constant.
Load : 0.5 HP, 440V 3? AC Motor with Speed Measurement
Controls : 1. ? by frequency selector.
2. Firing angle.
Indicator : 1. Mains ON.
Sockets : 1. 8 pin socket for connecting Motor & tacho.
2. 3 pin socket for CRO.
Display : 1. 3 ? digit to indicate AC voltage.
2. 3 ? digit to indicate speed in RPM.
Motor : 0.5 HP AC motor 3 ? 440V, 50Hz with Speed Measurement
Experiments : 1. Study the Cyclo converter firing circuit.
2. Speed control of AC Motor.
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