Dongyang Mechatronics Corp.

In-jae Lee

Jae-sung Cho

A driving circuit of a direct current brushless motor is provided. The circuit includes a sensing portion, arranged around a rotor, for generating sensing signals according to a position of the rotor, and a stator coil controller for supplying current to each stator coil using the sensing signals, wherein when the rotor is sensed, the sensing portion generates a first sensing signal having a predetermined high-state interval longer than a half rotating period, and a second sensing signal having the predetermined high state interval starting before the high-state of the first sensing signal is finished, and wherein the stator coil controller supplies current to the stator coil during the time when one of the first and second sensing signals is low. Accordingly, since it is not necessary to control phases of rotor sensing signals, the circuit is simplified and consumption power is reduced.

Driving circuit of direct current brushless motor

A brushless motor is provided. The brushless motor of the present invention includes a shaft, a rotor, having a plurality of field magnets attached thereto, fixed to the shaft, a stator for forming a magnetic field to enable rotation of the rotor, a housing in which the rotor and stator are installed, and a motor driving unit, wherein the arc length of a portion of the field magnet used for detecting the position of the rotor and that of the remaining portion thereof are formed to be different from each other. According to the brushless motor of the present invention, it is possible to increase efficiency of the brushless motor and to reduce manufacturing costs.

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Incheon, South Korea

In-jae Lee