Hyundai Motor Company

Kia Motors Corporation

Myunghwa Ind. Co., Ltd.

Geun Oh Dong

Yeon Ho Kim

Jung Hoon Park

Jae Shin Yi

Byoung Hoon Choi

Jae Man Cho

Dong Soo Shim

Kyoung Hee Kim

Hyeong Geun Song

Tae Sung Oh

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.

Brushless direct current electric motor driving control method and system of electrical water pump

A method for diagnosing an electric water pump of an internal combustion engine includes determining whether a present condition is a coil-open diagnosis condition that enables diagnosis of whether any coil of a sensorless 3-phase motor used in the electric water pump is open. When the coil-open diagnosis condition is satisfied, whether a coil of one phase is open is determined by using a change in phase currents. When the coil-open diagnosis condition is satisfied, whether coils of two phases are open is determined by using a magnitude of a motor torque or a magnitude of an average phase current. When the coil-open diagnosis condition is satisfied, whether any coil of the motor is open during driving of the motor is determined by using a variation in the motor torque.

Method for diagnosing electric water pump of engine

Growing community of inventors

Gyeonggi-do, South Korea

Geun Oh Dong