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Brushless direct current motor

A brushed DC motor and armature winding technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, winding conductor shape/style/structure, etc., can solve problems that are not given

Inactive Publication Date: 2012-11-14
李荟敏
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also no technical solution for reducing the armature reaction when a smaller air gap is used

Method used

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Embodiment Construction

[0013] Such as figure 1 Shown is a 2-pole 10-slot single-layer composite winding expansion diagram, which is disclosed in the Chinese invention patent of "Brushless DC Motor and Its Commutation and Control Method" with the application number: "2005101244451". It has only 5 leads The wire can use 5 pairs of power electronic switching devices for commutation, which has the advantage of using a small number of power electronic switching devices, but the winding ends are inconvenient to arrange or require long ends. figure 2 It is an expanded diagram of a double-layer laminated winding with 2 poles and 10 slots. As an existing technology used in ordinary brushed DC motors, it has been published in some documents. It has 10 lead wires, which need to be used when commutating with power electronic switching devices. Using 10 pairs of power electronic switching devices, using too many power electronic switching devices is its biggest shortcoming. figure 1 , figure 2 It is drawn as...

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Abstract

The invention discloses a brushless direct current motor, which is applicable in occasions that speed needs to be regulated for operation or no speed needs to be regulated but rotate speed is higher than 3000r / min. The brushless direct current motor has the main characteristics that on electromagnetic structure: an armature winding is arranged on a stator, winding elements, with phase differences of edges at integer polar distances, namely, with same phase, are in series or parallel connection to form a group to share a pair of outgoing lines; outgoing lines of grouped winding with phase differences of edges at two grooves or a plurality of grooves are in head-to-tail ligation, namely a closed ring is connected in a repeatedly changing type or a repeated wave type, so that the armature winding has fewest number of the outgoing lines. According to the brushless direct current motor, fewest electronic power switch elements are adopted for inversion, and the application quantity of the electronic power switch elements is not increased with the increase of the number of poles of the motor; a non-ferromagnetic magnetic stop band or a non-ferromagnetic groove for restraining armature reaction is arranged in the middle each pole of a pole wheel for half-and-half separate the poles, so that magnetic path and magnetic resistance of the armature reaction are increased, and only a tiny armature air gap can restrain the influence of the armature reaction on an air-gap field.

Description

technical field [0001] The invention discloses a brushless direct-current motor, which is suitable for occasions where speed regulation is required for operation or occasions where the working speed is higher than 3000 rev / min although speed regulation is not required. For example, various electric transmission vehicles include but are not limited to electric transmission wheeled vehicles or tracked vehicles such as tanks, armored vehicles and tractors, electric transmission vehicles, electric vehicles, electric aircraft, electric transmission rail diesel locomotives and electric locomotives, subway vehicles or Light rail electric vehicles, electric transmission ships, submarines; and various equipment including but not limited to industrial and mining fans, pump stations and various refrigeration or metallurgical chemical industry equipment including but not limited to compressors, rolling mills and various material conveying machinery; Various mechanical processing equipment...

Claims

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Application Information

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IPC IPC(8): H02K3/28H02K1/22
Inventor 李荟敏
Owner 李荟敏
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