BRUSHLESS DIRECT CURRENT ELECTRIC MOTOR DRIVING CONTROL METHOD AND SYSTEM OF ELECTRICAL WATER PUMP
First Claim
1. A method for controlling driving of a brushless direct current electric motor (BLDC) of an electric water pump, comprising:
- estimating, by a controller, an initial position of a rotor based on a magnitude of a current detected in a three-phase coil wound on a stator;
converting, by the controller, a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on a three-phase current, and outputting the converted direct currents;
acquiring, by the controller, a rotational angle, a speed, a flux and a torque of the rotor based on values of the three-phase current, a voltage generated based on flow of the three-phase current, a predetermined coil resistance, and an inductance input; and
adjusting, by the controller, a speed of the motor based on the acquired rotational angle, speed, flux, and torque of the rotor.
1 Assignment
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Accused Products
Abstract
A method and system of controlling driving of a brushless DC electric motor (BLDC) of an electric water pump are provided. The method includes estimating an initial position of a rotor using a magnitude of a current detected in a three-phase coil wound on a stator and converting a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on the three-phase current. The converted direct currents are output and a rotational angle, a speed, a flux and a torque of the rotor are acquired based on values of the three-phase current, a voltage generated according to flow of the three-phase current, a predetermined coil resistance, and an inductance input. A speed of the motor is then adjusted based on the acquired rotational angle, speed, flux, and torque of the rotor.
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Citations
12 Claims
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1. A method for controlling driving of a brushless direct current electric motor (BLDC) of an electric water pump, comprising:
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estimating, by a controller, an initial position of a rotor based on a magnitude of a current detected in a three-phase coil wound on a stator; converting, by the controller, a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on a three-phase current, and outputting the converted direct currents; acquiring, by the controller, a rotational angle, a speed, a flux and a torque of the rotor based on values of the three-phase current, a voltage generated based on flow of the three-phase current, a predetermined coil resistance, and an inductance input; and adjusting, by the controller, a speed of the motor based on the acquired rotational angle, speed, flux, and torque of the rotor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for controlling driving of a brushless direct current electric motor (BLDC) of an electric water pump, comprising:
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a memory configured to store program instructions; and a processor configured to execute the program instructions, the program instructions when executed configured to; estimate an initial position of a rotor based on a magnitude of a current detected in a three-phase coil wound on a stator; convert a current magnitude that reflects a rotational angle of the rotor with respect to the initial position into two direct currents based on a three-phase current, and output the converted direct currents; acquire a rotational angle, a speed, a flux and a torque of the rotor based on values of the three-phase current, a voltage generated based on flow of the three-phase current, a predetermined coil resistance, and an inductance input; and adjust a speed of the motor based on the acquired rotational angle, speed, flux, and torque of the rotor. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification