摘要:
A method and apparatus for controlling a permanent magnet synchronous motor by accurately detecting 3-phase motor currents from a DC input current in a full voltage range are provided. In the motor control apparatus for detecting the 3-phase motor currents on the basis of the value of the current detected at a DC side of a PWM inverter, when a difference width between PWM pulse signals of two of three phases of the 3-phase PWM inverter which cannot detect the motor currents is not larger than a predetermined value or when the output voltage of the 3-phase PWM inverter is low, the apparatus automatically reduce the carrier frequency of the PWM inverter.
摘要:
A method and apparatus for controlling a permanent magnet synchronous motor by accurately detecting 3-phase motor currents from a DC input current in a full voltage range are provided. In the motor control apparatus for detecting the 3-phase motor currents on the basis of the value of the current detected at a DC side of a PWM inverter, when a difference width between PWM pulse signals of two of three phases of the 3-phase PWM inverter which cannot detect the motor currents is not larger than a predetermined value or when the output voltage of the 3-phase PWM inverter is low, the apparatus automatically reduce the carrier frequency of the PWM inverter.
摘要:
A control of a control device and control method of an automatic transmission provided on a vehicle to shift the automatic transmission between forward, reverse and neutral gears, includes the steps of: detecting a shift request from one of the forward or reverse gear to the other of the forward or reverse gear; acquiring an operating condition relating to a shift from one of the forward or reverse gear to the other of the forward or reverse gear; acquiring a running condition from a vehicle speed sensor of the vehicle; determining whether to permit a gear shift based on the operating condition and the running condition when a shift request is detected; and executing a control to shift from one of the forward or reverse gear to the other of the forward or reverse gear when the shift determination device determines that a gear shift is permissible.