Motor driving apparatus and control method therefor
AssigneesHyundai Motor Company, Kia Corporation
InventorsSung Do Kim, Joo Yeon Kim, Min Su Kang, Chang Seok You
Life of this patent
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Abstract
A motor driving apparatus includes a motor an inverter driving the motor based on a switching signal, and a controller. The controller determines a current position estimated value of the motor by applying a zero-voltage vector pulse to the switching signal when entering the driving control of the motor, determines whether the motor is in a stop state according to an amount of change in the current position estimated value, and performs a pulse width modulation control by adjusting a duty ratio of the switching signal when the motor is determined to be in the stop state.
Claims15
A motor driving apparatus comprising:
- a motor;
- an inverter configured to drive the motor based on a switching signal;
- and
- a controller configured to determine a current position estimated value of the motor by applying a zero-voltage vector pulse to the switching signal when entering a driving control of the motor, to determine whether the motor is in a stop state according to an amount of change in the current position estimated value, and to perform a pulse width modulation control by adjusting a duty ratio of the switching signal when the motor is determined to be in the stop state;
- wherein the controller is configured to determine the current position estimated value based on a result of the current sensing of the motor when the zero-voltage vector pulse is applied.
A method for controlling a motor driving apparatus comprising:
- determining a current position estimated value of a motor by applying a zero-voltage vector pulse to a switching signal that is input to an inverter that drives the motor when entering a driving control of the motor;
- determining whether the motor is in a stop state according to an amount of change in the current position estimated value;
- and
- performing a pulse width modulation control by adjusting a duty ratio of the switching signal when determined as the stop state;
- wherein determining the current position estimated value comprises:
- determining the current position estimated value based on a result of a current sensing of the motor when applying the zero-voltage vector pulse.
Dependencies are inferred from the claim text.