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IGBT Based High Switching Frequency Chopper

Aim

To Control DC Permanent Magnet motor using High frequency Switching chopper.

Apparatus required

 

Circuit Diagram



circuit-diagram-of-igbt

Mimic Diagram



igbt-based-high-switching-frequency-chopper

Procedure

  • Connections are made as shown in circuit diagram
  • First turn on SW2 and verify whether getting the pulse across G1, G2, G3 and G4.
  • Now patch the pulse unit to power unit.
  • Turn on SW1 (input power supply).
  • By varying ?, Observe corresponding Output waveform at load terminal.
  • To verify the motor speed and direction.

Output Waveform



output-waveform-of-igbt

Tabulation

S.No

Position

Direction

1.

2.

3.

0

Max

Min

Stop

Forward

Reverse

 
Note

Min positions in pot (a) is Forward running, Max position in pot (a) is Reversing running, Center is Stop.

Result

Above experiment was done and the result was verified with Motor Running.