Power Electronics Lab

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STUDY OF SCR CHARACTERISTICS Or (Mosfet Characteristics) (LGS PE-1)The set up comes in to parts with provision for high voltage variable power supply (0 to 500 volts), 0 to 10 volts with....

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Logsun Systems

Hingne Khurd, Pune, Maharashtra

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Member Since 12 Years
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STUDY OF SCR CHARACTERISTICS Or (Mosfet Characteristics) (LGS PE-1)
The set up comes in to parts with provision for high voltage variable power supply (0 to 500 volts), 0 to 10 volts with voltmeter and provision for gate current measurement, anode current measurement in the range of 0 to 10 mA.
The part (A) houses variable power supply and part B provides facility to connect various SCR or MOSFET,diac,triac,IGBT along with load. Various characteristics of the device with measurement of latching current, holding current for SCR can be performed.

STUDY OF SCR FIRING CIRCUITS: (LGS PE-2)
Study of SCR firing circuits can be done with the help of five methods namely
i) Basic D.C. firing circuit.
ii) Resistance firing circuit.
iii) R-C phase shift-firing circuit.
iv) Ramp and pedestal with anti parallel connected SCRs circuit.
Scope of supply:
This set up having top anodized plate, with printed circuit diagrams, includes ammeter & voltmeter for load current & voltage measurement.

Panel Dimensions:
1. 61cm(L) 40cm W), 10cm(H)
2. Panel provision
3. Facility for observation of waveforms on C.R.O.
4. Provision for varying firing angle of SCRs.
5. Load control facility.
6. Appropriate test points are provided on panel.

JONES CHOPPER (LGS PE-3)
30 V d.c. 1A fixed power supply for the chopper and d.c. Voltage is chopped down by main thyristor and commutating thyristor for variation of output from voltage of 5 to 25 volts b varying the on time control and frequency control of the chopping frequency circuit of the main thyristor. Optional analog voltmeter provided for measurement of output voltage. Appropriate test points provided. Size: 52 * 31*10cm (L*B*H)

MORGAN’S CHOPPER (LGS PE-4)
A fixed d.c. Voltage of 30 volts provided for the input of chopper and the same is chopped down to vary from 5 to 25 volts by a single thyristor and resonating L-C circuit. Variable load facility provided. The frequency of chopping also can be varied. Waveforms can be observed with the test points provided on the panel. It is a self-contained unit. Panel size:52*31*10 CM.(L*B*H)

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