brake chopper circuit

 brake chopper circuit

A chopper is a device that converts fixed DC input to a variable DC output voltage directly.

A braking chopper is an electrical switch that limits the DC bus voltage by switching the braking energy to a resistor where the braking energy is converted to heat.

Braking choppers are automatically activated when the actual DC bus voltage exceeds a specified level depending on the nominal voltage of the variable-frequency drive.

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Brake chopper