Patent ID: 6646394
Filing Date: 2003-11-11
Classification: B60K,B60L,B60W,H02P,Y02T,Y10S

Abstract:
A control device for a rotating electrical machine system having a first rotating electrical machine and a second rotating electrical machine, the rotation of each rotating electrical machine being controlled by a current flowing in response to the rotational phase of a rotor thereof, the control device comprising:a single current control circuit which is connected to the first and second rotating electrical machines and produces a composite current comprising the current for each rotating electrical machine; and a controller functioning to: set an operating point of the first rotating electrical machine, set an operating point of the second rotating electrical machine in response to the set operating point of the first rotating electrical machine so that one of the efficiency of the current control circuit and the overall efficiency is maximized, wherein the overall efficiency is the product of the efficiency of the current control circuit, the efficiency of the first rotating electrical machine, and the efficiency of the second rotating electrical machine, set the current for each rotating electrical machine based on the set operating points of the first and second rotating electrical machines, so as to minimize the current average value of the composite current while maintaining the set operating points of the first and second rotating electrical machines, and control the current control circuit so that the current control circuit produces the composite current for all the first and second rotating electrical machines.