MOTOR CONTROL METHOD AND MOTOR CONTROL DEVICE

摘要

A system has an acceleration region SU and a deceleration region SD between operation start and end positions of a wiper arm. In the acceleration region and the deceleration region, an addition amount and a subtraction amount are calculated, respectively, based on a difference between a maximum rotation speed and a current rotation speed to update a target rotation speed. The addition amount is larger than the subtraction amount, and a constant speed region CV is between the acceleration region SU and the deceleration region SD. When a change amount of an operation angle of the wiper arm does not exceed the constant speed region CV, the operation angle change amount is subtracted from the constant speed region. Further, when the operation angle change amount exceeds the constant speed region CV, the target rotation speed is updated by the same change amount.

主权项

1. A motor control method used in a system, the system operating an object to be controlled by a motor and being configured such that an acceleration region and a deceleration region for the operation of the object to be controlled are set between operation start and end positions of the object to be controlled, the method being characterized in that:
when the object to be controlled is moved from the operation start position to the operation end position, a deceleration start position from which the deceleration region is started is calculated from information of the operation start and end positions, in the acceleration region, an addition amount to be added to a current target rotation speed of the motor is calculated from a difference between a maximum rotation speed of the motor and a current rotation speed of the motor and addition amount information concerning the rotation speed of the motor, and the motor is accelerated so as to be rotated at the target rotation speed until it is detected that the deceleration start position is reached while the target rotation speed is sequentially updated by the addition amount, in the deceleration region, at a time point when it is detected that the deceleration start position is reached, a subtraction amount to be subtracted from the current target rotation speed of the motor is calculated from a difference between the maximum rotation speed of the motor and current rotation speed of the motor and subtraction amount information concerning the rotation speed of the motor, and the motor is decelerated so as to be rotated at the target rotation speed until it is detected that the operation end position is reached while the target rotation speed is sequentially updated by the subtraction amount, and the addition amount information and the subtraction amount information are set such that the addition amount in the acceleration region is larger than the subtraction amount in the deceleration region.