Patent ID: 7190135
Filing Date: 2007-03-13
Classification: B62D,H02M

Abstract:
1. A method for controlling an electric motor, the method comprising: determining whether a magnitude of a desired voltage command falls between a first value and a second value utilizing a controller, the second value being greater than the first value; and if said magnitude of said desired voltage command falls between said first value and said second value, then pulse width modulating said desired voltage command between said first value and said second value over a determined sample period, thereby resulting in a modulated voltage command utilizing said controller; generating a first set of motor duty cycle commands based upon the modulated voltage command, utilizing said controller, said first set of motor duty cycle commands being received by an inverter operably coupled to said electric motor; generating a first set of modulated phase voltage signals based on the first set of motor duty cycle commands for controlling said electric motor, utilizing said inverter; and if said magnitude of said desired voltage command is greater than or equal to said second value, then generating a second set of motor duty cycle commands based upon said desired voltage command, utilizing said controller, said second set of motor duty cycle commands being received by said inverter; and generating a second set of modulated phase voltage signals based on said second set of motor duty cycle commands for controlling said electric motor, utilizing said inverter.