Patent ID: 7164253
Filing Date: 2007-01-16
Classification: B60L,H02M,H02P,Y02T

Abstract:
1. A motor drive controller, for supplying output of a dc power source to a first motor through an inverter and controlling drive of the first motor, comprising: a converter for voltage converting output voltage from the dc power source for supply to the inverter; and a control section for controlling supply current to the first motor through PWM control of the inverter, the inverter comprising a U phase arm, a V phase arm and a W phase arm, each of the U phase arm, the V phase arm and the W phase arm including two transistors connected in series, the converter comprising: a reactor connected at one end to the dc power source, and at least two switching elements, being an upper switching element connecting the other end of the reactor to a power source side of the inverter and a lower switching element connecting to an earth side of the inverter, wherein the control section calculates an inverter input voltage target value appropriate to efficient motor drive in response to rotational speed of the first motor and a target output torque, and performs PWM control of the converter switching elements in order to achieve the input voltage target value, and a separate inverter for supplying current to a second motor is connected to the output of the converter, and the control section outputs a higher voltage of two inverter input target voltages calculated from rotational speeds and target outputs of the first and second motors.