DETECTION OF ELECTRIC MOTOR SHORT CIRCUITS

摘要

One embodiment describes a method that includes determining a desired torque level of a motor actuated by a motor starter; determining, using a control system, a configuration of the motor starter to achieve the desired torque level, in which determining the configuration includes determining which of a plurality of switching devices in the motor starter should be opened and which should be closed; and instructing, using the control system, the motor starter to implement the determined configuration by opening or closing one or more of the plurality of switching devices.

主权项

1. A method comprising:
detecting whether a phase-to-ground short is present in a first winding of a motor by briefly connecting a first phase of electric power to the motor slightly before a voltage zero-crossing by the first phase of electric power; detecting whether a phase-to-ground short is present in a second winding of a motor by briefly connecting a second phase of electric power to the motor slightly before a voltage zero-crossing by the second phase of electric power; and detecting whether a phase-to-ground short is present in a third winding of a motor drive by briefly connecting a third phase of electric power to the motor slightly before a voltage zero-crossing by the third phase of electric power.