| CPC H02P 29/00 (2013.01) | 8 Claims |
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1. A method for operating an electric motor, comprising:
operating, by power electronics of a drive system, an electric motor of the drive system at a first operating point of the electric motor using pulse width modulation or by providing a square-wave alternating current voltage to the electric motor; and
operating, by the power electronics of the drive system, the electric motor of the drive system at a second operating point of the electric motor using overmodulation or by providing the square-wave alternating current voltage to the electric motor,
wherein pulse width modulation is used to operate the electric motor at the first operating point of the electric motor during normal operation of the electric motor,
wherein the square-wave alternating current voltage is provided to the electric motor instead of using pulse width modulation to operate the electric motor at the first operating point of the electric motor during heat generation operation of the electric motor,
wherein overmodulation is used to operate the electric motor at the second operating point of the electric motor during normal operation of the electric motor,
wherein the square-wave alternating current voltage is provided to the electric motor instead of using overmodulation to operate the electric motor at the second operating point of the electric motor during heat generation operation of the electric motor,
wherein the first operating point of the electric motor is different from the second operating point of the electric motor,
wherein the first operating point is below a limit power rating of the electric motor for pulse width modulation, and
wherein the second operating point is above the limit power rating of the electric motor for pulse width modulation.
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