Shift range control apparatus
AssigneeDenso Corporation
InventorJun Yamada
Life of this patent
Estimating the term…
Abstract
A control circuit controls driving of a motor to switch over a shift range. A target rotation speed setting part sets a target rotation speed of the motor. A rotation speed detection part detects a present rotation speed, which is an actual rotation speed, of the motor. A rotation speed error calculation part calculates a rotation speed error, which is an error between the target rotation speed and the present rotation speed. A request torque calculation part calculates a request torque for the motor based on the rotation speed error. A phase lead correction value calculation part calculates a phase lead correction value of a current supply phase relative to a rotation phase of a rotor of the motor based on the request torque.
Claims8
A shift range control apparatus for controlling a shift range switchover device, which includes a motor, to switch over a shift range, the shift range control apparatus comprising:
- a target rotation speed setting part for setting a target rotation speed of the motor;
- a rotation speed detection part for detecting a present rotation speed, which is an actual rotation speed, of the motor;
- a rotation speed error calculation part for calculating a rotation speed error, which is an error between the target rotation speed and the present rotation speed;
- a request torque calculation part for calculating a request torque for the motor based on the rotation speed error;
- and
- a phase lead correction value calculation part for calculating a phase lead correction value of a current supply phase relative to a rotation phase of a rotor of the motor based on the request torque, wherein:
- the phase lead correction value calculation part calculates the phase lead correction value based on the request torque and the present rotation speed;
- a driver part for driving the motor by using the phase lead correction value;
- and
- the phase lead correction value calculation part has a data map defining a relation among the phase lead correction value, the request torque and the present rotation speed and calculates the phase lead correction value with reference to data of the data map.
A shift range control apparatus for controlling a shift range switchover device including a switched reluctance motor and a detent mechanism, which is connected to the SR motor and shaped to apply different loading to the SR motor during rotation of the SR motor, the shift range control apparatus comprising:
- a target rotation speed setting part for setting a target rotation speed of the SR motor;
- a rotation speed detection part for detecting a present rotation speed, which is an actual rotation speed, of the SR motor;
- a rotation speed error calculation part for calculating a rotation speed error, which is an error between the target rotation speed and the present rotation speed;
- a request torque calculation part for calculating a request torque for the SR motor based on the rotation speed error, wherein the request torque calculation part includes a torque correction value calculation section for calculating based on the rotation speed error a torque correction value which is added to a predetermined base torque value to calculate the request torque;
- a phase lead correction value calculation part for calculating a phase lead correction value of a current supply phase relative to a rotation phase of a rotor of the SR motor based on the request torque;
- and
- a driver part for driving the SR motor by variably controlling the phase lead value of the current supply phase in accordance with the phase lead correction value;
- wherein the phase lead correction value calculation part includes a data map defining the phase lead correction value relative to the request torque and the present rotation speed.
Dependencies are inferred from the claim text.