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Design method of no-commutating permanent magnet direct current rotating motor

A rotating motor, permanent magnet DC technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit, electric components, etc., can solve the problems of low failure rate and long service life

Inactive Publication Date: 2017-05-24
丁士来
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-commutation permanent motor without any form of commutation device, low failure rate and long service life in view of the shortcomings of the brush commutation or brushless commutation installed on the existing DC rotating motor. Design Method of Magnetic DC Rotating Machine

Method used

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  • Design method of no-commutating permanent magnet direct current rotating motor
  • Design method of no-commutating permanent magnet direct current rotating motor
  • Design method of no-commutating permanent magnet direct current rotating motor

Examples

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Effect test

Embodiment 1

[0025] Example 1: Design scheme of single-stator non-commutating permanent magnet DC rotary motor

[0026] Figure 4 (a) represents the design scheme of a single-stator non-commutating permanent magnet DC rotary generator; Figure 4(b) represents the design scheme of a single-stator non-commutated permanent magnet DC rotating motor. The structural forms of the two schemes are the same, mainly composed of a stator and a rotor. The rotor part: consists of a rotating shaft 6, a rotor ferromagnetic set 7 and a tile-shaped permanent magnet 2; the stator part: consists of a ferromagnetic stator core 8a, a non-magnetic The ferromagnetic stator core 8b and the DC winding 1 are composed. An air gap 9 is provided between the rotor and the stator. The ferromagnetic stator core 8a is in the shape of a cylinder, and the inner side is provided with a notch for winding the coil; the non-ferromagnetic stator core 8b is also in the shape of a ring, and the outer side is provided with a notc...

Embodiment 2

[0031] Example 2: Design scheme of double-pole, double-stator non-commutating permanent magnet DC rotary motor

[0032] see Figure 5 , wherein the structures of the two stators are exactly the same, only a ferromagnetic magnetic circuit 8c and a positioning block 10 need to be set between the two stators. Figure (a) is a cross-sectional view along the axial direction, Figure (b) is a cross-sectional view along the A-A direction, and Figure (c) is a cross-sectional view along the B-B direction. The permanent magnetic circuit path of this scheme: N pole of the right permanent magnet → rotor ferromagnetic set 7 → S pole of the left permanent magnet → N pole of the left permanent magnet → air gap 9 → left stator core 8a → iron Magnetic magnetic circuit 8c→right stator core 8a→air gap 9→right permanent magnet S pole. The working principle is exactly the same as Example 1. Since the permanent magnet magnetic circuit of this scheme is complete and no flux leakage will occur, it i...

Embodiment 3

[0033] Embodiment 3: Design scheme of permanent magnet direct current rotary motor without commutation of outer rotor

[0034] see Figure 6 , and example 1 and example 2 are different: this design scheme is that permanent magnet 2 is installed on the outer rotor ferromagnetic casing 7, and cylindrical iron core and coil are stator. 11 among the figure represents inner stator fixing plate. Because there is a non-ferromagnetic medium in the permanent magnet magnetic circuit, there is flux leakage in this scheme, so it is more suitable for designing and manufacturing a small outer rotor non-commutating permanent magnet DC rotating motor.

[0035] The manufacturing process and winding method of the stator core:

[0036] Such as Figure 7 As shown, the design method of the non-commutated permanent magnet DC rotating machine of the present invention, the stator core is an assembly. The design should take into account the convenience of the stator coil 1 winding process. Figur...

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Abstract

The invention discloses a design method of a no-commutating permanent magnet direct current rotating motor. The rotating motor is designed according to the principle that a current-carrying coil is subjected to ampere force in a magnetic field and a conductor cuts magnetic lines of force to generate induced electromotive force and the characteristic that a ferromagnet isolates and shields the magnetic field. By using the method, no matter the rotating motor is used as a direct current motor or a direct current generator, a commutating device is not needed; the rotating motor is mainly composed of a stator winding and rotor permanent magnets, and the stator winding is axially wound on the cylindrical wall of a cylindrical ferromagnet core; and the polar faces of the same magnetic poles of a plurality of permanent magnets on the rotor face the stator winding. The design method has the advantages: the permanent magnet direct current rotating motor does not need a commutating device, and the defect of shot service life of the direct current motor due to commutation is overcome; the requirement of a sensor and a supporting electronic element of a brushless direct current motor for the working environment is eliminated; and the permanent magnet direct current rotating motor has the advantages of simplicity in processing, low manufacturing cost, low fault rate and long service life.

Description

technical field [0001] The invention relates to the field of DC rotating electrical machines, in particular to a design method of a permanent magnet DC rotating electrical machine without carbon brushes and electronic commutation devices. Background technique [0002] In the DC motor series, there are brushed DC motors and brushless DC motors. The brushed DC motor is reversible and can be used as a DC motor; it can also be used as a DC generator. When used as a motor, the brush device of the brushed DC motor has two functions, one is to guide the DC current into and out of the armature winding, and the other is to commutate; The alternating current generated by the induction of the armature winding is rectified and exported. The brushless DC motor just replaces the mechanical brush commutator with electronic (Hall element) commutation technology, and its function is also the commutation function. The brushed DC motor has the advantages of good speed regulation characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K1/27
CPCH02K1/16H02K1/165H02K1/2746H02K1/2786
Inventor 丁士来
Owner 丁士来
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