MOTOR DRIVE CONTROL DEVICE AND OPERATING METHOD THEREOF

摘要

Motor Drive Control Device configured to properly start up various types of motors under operating conditions where motor operations are performed in a wide range of temperature and power supply voltage, includes output drive controllers that supply PWM drive output signals to an output pre-driver in such a manner as to minimize the error between a current instruction signal and a current detection digital signal. In response to a detected induced voltage generated from a voltage detector upon startup of a motor, an initial acceleration controller supplies initial acceleration output signals specifying a conducting phase for initial acceleration of the motor to the output drive controllers. The initial acceleration controller, the output drive controllers, and an output driver make a conducting phase change and perform a PWM drive to provide the initial acceleration of the motor.

主权项

1. A method of operating a motor drive control device configured to drive a multiphase DC motor
the method including the steps of: (a) detecting a motor drive current flowing to the multiphase DC motor; (b) converting the motor drive current to a current detection digital signal supplying PWM drive output signals to an output pre-driver of the motor drive control device in such a manner as to minimize an error between a current instruction signal and the current detection digital signal; (c) detecting an induced voltage of a stator coil of each phase of the multiphase DC motor; (d) supplying a plurality of initial acceleration output signals specifying a conducting phase for initial acceleration of the multiphase DC motor to an output drive controllers of the motor drive control device; (e) conducting an initial acceleration of the multiphase DC motor, wherein upper-limit duty values of the PWM drive output signals during a period of the initial acceleration can be arbitrarily set.