Motor controller and method of controlling the motor
First Claim
1. A motor controller to control a motor having a stator coil and a rotor, the:
- motor controller comprising;
an activating operator adapted to;
receive an operation command with a predetermined target frequency while the motor remains stationary,activate the motor at a predetermined voltage and a voltage phase, andgradually increase, after activating, an operation frequency of the motor;
an operation exchanger adapted to switch an activation operation into a normal operation when the operation frequency reaches a predetermined frequency, where the predetermined frequency is lower than the predetermined target frequency;
an evaluator adapted to evaluate a location of the rotor included in the motor and the operation frequency based on a current or voltage detected from the motor;
a normal operator adapted to operate the motor in a normal manner based on the evaluated rotor location;
an error determiner adapted to determine, during operation of the motor, whether there is an error on the motor based on at least one of the detected current, the detected voltage, and the evaluated operation frequency; and
an operation controller adapted to stop the motor upon a determination by the error determiner of an error on the motor.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates a motor controller and a motor control method of controlling a motor having a stator coil and a rotator. The motor controller includes: an activating operator receiving an operation command with a prescribed target frequency while the motor remains stationary, activating the motor at a prescribed voltage and a voltage phase, and then gradually increasing an operation frequency of the motor; an operation exchanger switching an activation operation into a normal operation when the operation frequency reaches a prescribed frequency lower than the target frequency; an evaluator evaluating a location of the rotor included in the motor and the operation frequency based on a current or voltage detected from the motor; a normal operator operating the motor in a normal manner based on the evaluated rotor location; an error determiner determining during the normal operation whether there is an error on the motor based on at least one of the detected current, the detected voltage, and the evaluated operation frequency; and an operation controller enabling the motor to stop in a case where it is determined that there is an error on the motor. The motor controller and the motor control method determine failure of location detection in a sensor-less manner and enable the motor to be stably stopped according to such a determination.
16 Citations
24 Claims
-
1. A motor controller to control a motor having a stator coil and a rotor, the:
- motor controller comprising;
an activating operator adapted to; receive an operation command with a predetermined target frequency while the motor remains stationary, activate the motor at a predetermined voltage and a voltage phase, and gradually increase, after activating, an operation frequency of the motor; an operation exchanger adapted to switch an activation operation into a normal operation when the operation frequency reaches a predetermined frequency, where the predetermined frequency is lower than the predetermined target frequency; an evaluator adapted to evaluate a location of the rotor included in the motor and the operation frequency based on a current or voltage detected from the motor; a normal operator adapted to operate the motor in a normal manner based on the evaluated rotor location; an error determiner adapted to determine, during operation of the motor, whether there is an error on the motor based on at least one of the detected current, the detected voltage, and the evaluated operation frequency; and an operation controller adapted to stop the motor upon a determination by the error determiner of an error on the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- motor controller comprising;
-
13. A method of controlling a motor having a stator coil and a rotor, the motor control method comprising:
-
receiving an operation command with a predetermined target frequency while the motor remains stationary; activating the motor at a predetermined voltage and a voltage phase, and then gradually increasing an operation frequency of the motor; switching an activation operation into a normal operation when the operation frequency reaches a predetermined frequency, where the predetermined frequency is lower than the target frequency; operating the motor in a normal manner based on a location of the rotor evaluated by an evaluator of the motor; determining, during the normal operation, whether there is an error on the motor based on a current or a voltage detected from the motor, or the evaluated operation frequency; and stopping the motor if it is determined that there is an error on the motor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification