Motor control device
View Patent ↗A motor control device capable of executing a start mode that takes into consideration both the start performance with respect to a residual load and the life of a drive circuit is provided. A motor control device for executing a start mode in which a rotor is rotated by forced commutation control: stores a current value at the time when a stop command to a synchronous motor is issued; and decides, when a start command to the synchronous motor is issued after the issuance of the stop command, a target current value based on the stored current value in the start mode in response to the start command.
1. A motor control method for controlling a synchronous motor with a start mode in which a rotor is rotated by forced commutation control, the motor control method comprising:
storing a current value at the time when a stop command to the synchronous motor is issued;
storing a rotation speed value when the stop command to the synchronous motor is issued; and
deciding a target current value in the start mode based on the stored current value and the stored rotation speed value, when a start command to the synchronous motor is issued after the issuance of the stop command.
2. A motor control method for controlling a synchronous motor with a start mode in which a rotor is rotated by forced commutation control, the motor control method comprising:
storing a current value at the time when a stop command is issued; and
deciding, when a start command to the synchronous motor is issued after the stop command to the synchronous motor is issued, a target current value in the start mode based on a time from the stop command to the start command and based on the stored current value.
3. A motor control method for controlling a synchronous motor with a start mode in which a rotor is rotated by forced commutation control, the motor control method comprising:
storing a current value at the time when a stop command to the synchronous motor is issued; and
deciding a time until end of the start mode based on the stored current value, when a start command to the synchronous motor is issued after the issuance of the stop command.
4. The motor control method according to claim 3 , wherein the time until the end of the start mode is decided by changing, depending on the stored current value, a rotation speed value for determining the end of the start mode.
5. The motor control method according to claim 3 , wherein the time until the end of the start mode is decided by changing, depending on the stored current value, acceleration of a rotation speed in the start mode.
6. The motor control method according to claim 3 , further comprising:
deciding a target current value in the start mode, based on the stored current value.