Title:
HIGH-EFFICIENCY DC MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/075747
Kind Code:
A1
Abstract:
The present invention relates to a DC motor used for electric cars, wireless vacuum cleaners, drones, and the like across various industries. A high-efficiency DC motor according to the prior art has upper and lower permanent magnets which have different polarities, and which face each other around the same center point, and an electromagnet is disposed in the middle of the upper and lower permanent magnets such that rotational power is obtained by using magnetic forces to the maximum extent. Such a conventional high-efficiency DC motor has a problem in that the direction of rotation is not constant, depending on the initial rotor position. In addition, the upper and lower permanent magnets pull the magnetic body of the electromagnet and thus interfere with rotations, thereby posing a problem in that the efficiency thereof is not substantially improved compared with a conventional BLDC motor. Accordingly, the present invention provides a DC motor having upper and lower permanent magnets disposed such that, when the upper and lower permanent magnets face each other, the center point of permanent magnets is positioned between permanent magnets on different surfaces, thereby solving the problems of motors according to the prior art, and having excellent rotational power and torque compared with conventional BLDC motors.
Inventors:
HWANG JOOWON (KR)
Application Number:
PCT/KR2020/012808
Publication Date:
April 22, 2021
Filing Date:
September 23, 2020
Export Citation:
Assignee:
HWANG JOOWON (KR)
International Classes:
H02K1/27; H02K23/40
Foreign References:
| KR20060030524A | 2006-04-10 | |||
| JP2002369477A | 2002-12-20 | |||
| KR20090015950A | 2009-02-12 | |||
| JP2012161229A | 2012-08-23 | |||
| JPH07336967A | 1995-12-22 |
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