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US 11,699,963 B2Granted
Position sensorless motor control system using single current sensor and motor control method of the same
AssigneeHyundai Mobis Co., Ltd.
InventorJun Hyuk Im
Life of this patent
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Abstract
A motor control system includes a reference current generator that generates a reference current based on a command, a motor voltage providing device that generates a phase voltage based on the reference current, a high frequency voltage, and a feedback current and provides a motor with the phase voltage, and a high frequency voltage generator that generates the high frequency voltage corresponding to a magnitude of voltage generated based on the reference current and the feedback current.
Claims11
A motor control system, comprising:
- a reference current generator configured to generate a reference current based on a command;
- a high frequency voltage generator configured to generate a high frequency voltage corresponding to a reference voltage generated based on the reference current and a feedback current corresponding to an amount of current consumed by a motor;
- and
- a motor voltage providing device configured to generate a phase voltage based on the reference current, the high frequency voltage, and the feedback current and to provide the motor with the phase voltage,
- wherein the motor voltage providing device is further configured to:
- generate a first reference voltage of a rotor reference coordinate system based on the feedback current and the reference current;
- convert the first reference voltage of the rotor reference coordinate system into a second reference voltage of a stator reference coordinate system, and provides the converted second reference voltage, as an input voltage, to the high frequency voltage generator to generate the high frequency voltage corresponding to the second reference voltage;
- and
- inject the high frequency voltage into the second reference voltage of the stator reference coordinate system.
6 more elements
A motor control system, comprising:
- a reference voltage generator configured to generate a reference voltage based on a reference current and a feedback current corresponding to amount of current consumed by a motor;
- a high frequency voltage generator configured to generate a high frequency voltage corresponding to the reference voltage;
- a first coordinate converter configured to inject the high frequency voltage into the reference voltage;
- and
- an inverter configured to generate a phase voltage based on an output of the first coordinate converter and to provide a motor with the phase voltage,
- wherein the first coordinate converter converts a first reference voltage of a rotor reference coordinate system into a second reference voltage of a stator reference coordinate system, and the second reference voltage converted by the first coordinate converter is provided, as an input voltage, to the high frequency voltage generator to generate the high frequency voltage corresponding to the second reference voltage, and
- wherein the first coordinate converter injects the high frequency voltage into the second reference voltage of the stator reference coordinate system.
4 more elements
A motor control method, comprising:
- generating a current command vector for generating a torque of a motor corresponding to a command;
- generating a voltage command vector according to a rotor reference coordinate system based on the current command vector and a feedback current vector;
- converting the voltage command vector into a first voltage vector according to a stator reference coordinate system;
- generating a high frequency voltage vector having a magnitude corresponding to a magnitude of the first voltage vector;
- synthesizing the first voltage vector with the high frequency voltage vector to generate a second voltage vector and converting the second voltage vector into a phase voltage command vector according to a three-phase coordinate system;
- generating a phase voltage based on the phase voltage command vector and providing the motor with the phase voltage;
- generating a phase current according to the three-phase coordinate system based on a DC-link current of an inverter which provides the phase voltage;
- and
- converting the phase current according to the three-phase coordinate system into the feedback current vector according to the rotor reference coordinate system.
6 more elements
Dependencies are inferred from the claim text.