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US 11,309,558 B2Granted
Control method and system for driving of motor and control method of driving of air compressor of fuel cell system using the same
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsDong Hun Lee, Keun Bong Ham, Chang Seok You, Min Su Kang, Sung Do Kim
Life of this patent
Estimating the term…
Abstract
A control method and system for driving of a motor and a control method of driving of an air compressor of a fuel cell system using the same include calculating an electrical rotation frequency of a motor, calculating a driving torque frequency of the motor based on the calculated electrical rotation frequency of the motor, and controlling torque of the motor to be repeatedly turned on/off at the calculated driving torque frequency.
Claims11
A motor driving control method, the method comprising steps of:
- calculating an electrical rotation frequency of a motor;
- calculating a driving torque frequency of the motor based on the calculated electrical rotation frequency of the motor;
- calculating phases of 3-phase current of the motor;
- calculating a start point for applying driving torque of the motor based on the calculated phases of 3-phase current of the motor;
- and
- controlling torque of the motor to be repeatedly turned on/off at the calculated driving torque frequency,
- wherein the step of calculating a driving torque frequency of the motor comprises calculating the driving torque frequency in synchronization with the calculated electrical rotation frequency of the motor,
- wherein the step of calculating a driving torque frequency of the motor further comprises determining the driving torque frequency as a multiple of 6/n of the calculated electrical rotation frequency of the motor, where n is a natural number, and
- wherein the step of calculating a start point for applying driving torque comprises calculating a start point at which any one of 3-phase current of the motor is 0 [A] based on the calculated phases of 3-phase current of the motor and applying the driving torque of the motor based on the calculated start point.
6 more elements
A motor driving control system comprising a processor including:
- a motor monitoring device configured to calculate an electrical rotation frequency of the motor;
- a driving torque frequency calculating device configured to calculate a driving torque frequency for controlling driving torque of the motor to be repeatedly turned on/off based on the electrical rotation frequency calculated by the motor monitoring device;
- and
- an inverter controller configured to control the driving torque of the motor to be repeatedly turned on/off at the driving torque frequency of the motor, calculated by the driving torque frequency calculating device,
- wherein the driving torque frequency calculating device calculates the driving torque frequency in synchronization with the calculated electrical rotation frequency of the motor,
- wherein the driving torque frequency calculating device determines the driving torque frequency as a multiple of 6/n of the calculated electrical rotation frequency of the motor, where n is a natural number,
- wherein the processor further includes a driving torque application time calculating device configured to calculate phases of 3-phase current of the motor and calculate a start point at which any one of 3-phase current of the motor is 0 [A] based on the calculated phases of 3-phase current of the motor, and
- wherein the inverter controller applies the driving torque of the motor based on the calculated start point.
5 more elements
A motor driving control method of an air compressor of a fuel cell system, for supplying compressed air to a fuel cell stack, the method comprising steps of:
- calculating an electrical rotation frequency of a motor;
- calculating a driving torque frequency of the motor based on the calculated electrical rotation frequency of the motor;
- calculating phases of 3-phase current of the motor;
- calculating a start point for applying driving torque of the motor based on the calculated phases of 3-phase current of the motor;
- and
- controlling torque of the motor to be repeatedly turned on/off at the calculated driving torque frequency,
- wherein the step of calculating a driving torque frequency of the motor comprises calculating the driving torque frequency in synchronization with the calculated electrical rotation frequency of the motor,
- wherein the step of calculating a driving torque frequency of the motor further comprises determining the driving torque frequency as a multiple of 6/n of the calculated electrical rotation frequency of the motor, where n is a natural number, and
- wherein the step of calculating a start point for applying driving torque comprises calculating a start point at which any one of 3-phase current of the motor is 0 [A] based on the calculated phases of 3-phase current of the motor and applying the driving torque of the motor based on the calculated start point.
6 more elements
Dependencies are inferred from the claim text.