	US 7,495,403 B2
	Method, apparatus and article for vibration compensation in electric drivetrains
Christophe Soudier, Ypsilanti, Mich. (US); Richard J. Hampo, Plymouth, Mich. (US); Vinod Reddy, Novi, Mich. (US); and Venkatapathi R. Nallapa, West Bloomfield, Mich. (US)
Assigned to Continental Automotive Systems US, Inc., Auburn Hills (US)
Filed on Mar. 30, 2005, as Appl. No. 11/95,035.
Claims priority of provisional application 60/558733, filed on Mar. 30, 2004.
Prior Publication US 2005/0253543 A1, Nov. 17, 2005
Int. Cl. H02P 7/00 (2006.01)

U.S. Cl. 318—432 [318/632]

11 Claims

8. A system for controlling an alternating current machine, the system comprising:

a torque to current conversion module configured to generate a torque current signal in response to a torque command signal;

a pulse width modulation module configured to receive a reference signal and to produce a pulse width modulated signal;

a vibration compensation module configured to generate a torque current compensation signal, a torque current peak compensation signal and an adaptation degree signal to compensate for vibrations based at least in part on a vibration signal, wherein the system is configured to produce the reference signal based at least in part on the torque current signal, the torque current compensation signal, the torque current peak compensation signal and the adaptation degree signal; and

a multiplier configured to multiply the torque current signal by the adaptation degree signal and to produce a multiplier output signal; an electrical limitation module configured to receive the multiplier output signal and to produce an electrical limitation output signal; a first summer configured to subtract the torque current peak compensation signal from the electrical limitation output signal and to produce a first summer output signal; and a second summer configured to subtract the torque current compensation signal from the first summer output signal and to produce the reference signal.