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Consider the following points: 1) Inherent short circuit operation 2) Regenerative capability 3) Need for inverter grade thyristors 4) Voltage spikes across the load Which of the following are true with CSI (current source inverter)

Consider the following points: 1) Inherent short circuit operation 2) Regenerative capability 3) Need for inverter grade thyristors 4) Voltage spikes across the load Which of the following are true with CSI (current source inverter) Correct Answer 1, 2 and 4

An inherent short circuit operation or simultaneous conduction in an inverter arm is controlled by the current source inverter used. (i.e. a current limited voltage source in series with a large inductance)

Regenerative breaking or multi quadrant operation of CSI:

  • If CSI connected to machine and works as inverter, then the power supply to DC link will be transferred to AC supply, and regenerative breaking will take place.
  • It reduces the voltage spikes by reducing the rate of using and fall of the current A large value of capacitance is required to sufficiently reduced the voltage spikes.
  • The circuit for CSI using only converter grade thyristor but not inverter grade.

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