Large-diameter type three-phase brushless permanent magnet direct current motor and assembling method thereof
A permanent magnet direct current, large-diameter technology, applied in electromechanical devices, magnetic circuits, wind power generation, etc., to achieve the effect of reducing copper consumption
Active Publication Date: 2013-03-27
SHENZHEN ACAD OF AEROSPACE TECH
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Problems solved by technology
[0026] The present invention solves the existing problems of the existing square wave permanent magnet motor and sine wave permanent magnet motor, and proposes a large pole square wave permanent magnet motor with new principle, new structure, high performance and low cost
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[0050] image 3 The general assembly structure of the motor in a preferred embodiment of the present invention is shown. The main components of this motor include a shaft 30, a rotor 1, a stator 2, etc. The physical air gap 5 between the rotor 1 and the stator 2 is 1-4mm. Wherein the Hall position sensor is used as the rotor position sensor, the magnetic sensitivity direction of the Hall position sensor is consistent with the normal direction of the rotor, installed on the stator bracket 20, and kept 1 between the outer circle of the rotor magnetic steel (ie permanent magnet). ~3mm air gap.
[0051] In the present invention, there is a corresponding relationship shown in the following table between the number of slots Z on the stator core and the number of magnetic poles 2P on the rotor core. Wherein, when the number of slots is 186, the number of magnetic poles is 124; when the number of slots is 216 , the number of magnetic poles is 144; when the number of slots is 228, the...
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A large-diameter type brushless permanent magnet direct current motor and an assembling method thereof. The number of magnetic poles on a rotor core is 2P. The number of slots in a stator core is Z. Z teeth on the stator core are composed of Z / 2 large teeth (6) and Z / 2 small teeth. One insertion slot (11) is provided on each yoke between two adjacent large teeth (6). Each small tooth is formed by inserting an end part of each small tooth core (8) into one of the insertion slots. Each large tooth (6) has a circular electrical angle of 150°~234°. Each small tooth together with two notches on its two sides occupy a circular electrical angle of 90°~6°. The sum of electrical angles of one large tooth (6) and one small tooth is 240°. Three-phase windings are wound on Z / 2 large teeth (6) separately, and Z / 6 concentrated windings are arranged at each phase. During assembling, firstly, the windings are wound on the large teeth (6) separately, and then the small teeth are embedded. It is convenient to wind the windings in the motor. The motor can be used as a torque motor or a wind generator.
Description
technical field [0001] The invention relates to a large-diameter permanent magnet motor, more specifically, to a large-diameter square wave brushless permanent magnet direct current motor and an assembly method thereof. This motor can be used as a torque motor and also as a wind generator. Background technique [0002] Permanent magnet motors can be divided into two categories: sine wave and square wave according to the driving current and back EMF waveform. A sine wave permanent magnet motor is generally called a permanent magnet synchronous motor (PMSM), or a sine wave AC servo motor. Another type of square-wave permanent magnet motor is called a square-wave brushless DC motor (BLDCM). [0003] Permanent magnet motors are reversible and can be used as both motors and generators. The output of the square wave permanent magnet generator is π / 2 larger than that of the sine wave permanent magnet generator, which is 1.57 times. [0004] During the 1980s, square wave permane...
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IPC IPC(8): H02K1/16H02K1/27
CPCY02E10/725H02K2213/03H02K29/03H02K1/165Y02E10/72
Inventor 漆亚梅李铁才汤平华杨贵杰
Owner SHENZHEN ACAD OF AEROSPACE TECH