Electrical machine with large number of poles
A technology of pole number and electric excitation, which is applied in the direction of controlling generators, synchronous motors for single-phase current, electrical components, etc., can solve the problems of slots affecting performance, small number of total slots, and limited output, etc., to achieve large output, Easy processing and high efficiency
Inactive Publication Date: 2005-08-17
SHENZHEN BEILAI ELECTRIC LAB
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Problems solved by technology
High frequency applications are limited
In addition, the armature core of the prior art motor has a small number of poles and a small number of slots, and the slots cannot be too deep so that the leakage inductance increases and affects performance. In order to obtain sufficient magnetomotive force, the structure of non-straight slots is often used , that is, the slot section is narrow, and the slot body is wide to accommodate windings with a larger number of turns
The disadvantage of this structure is that there must be a certain number of turns of electromagnetic wires in the tank body located in the center of the tank body and not adjacent to the tank wall core, and the heat conduction channels of these wires have to go through a long insulating medium path to reach the heat dissipation. The iron core wall limits the temperature rise performance of the motor, which also limits the increase in output
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[0029] The present invention will be described in further detail below with reference to the accompanying drawings: The first type of motor with a large number of poles is called a slot type, and the arrangement of the stator core punching pieces and windings in the slots is shown figure 1 and figure 2 . The space occupied by the winding is a straight slot. In these two figures, 101 and 201 are open straight slots, 103 and 203 are teeth, 104 and 204 are punching yokes, 102 and 202 are winding wire sections arranged in layers in the slot, and 102 is for each layer Double-strand solid wire is wound, the figure shows the case of six layers; 202 is wound according to each layer of single-strand solid wire, the figure shows the case of four layers. From figure 1 , figure 2 It can be seen that the characteristic of the single and double strand layered neat winding method is that each turn of the wire in the slot, except for the insulating layer, is directly adjacent to the slot wall...
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The invention relates to an improved structure of medium frequency and low speed electrical machine, in particular suitable for machine with large number of poles. Rotor is of permanent magnetic or electrically excited or induced, and number of poles is more than or equal to 8, armature windings consists of solid conductor and are arranged in layers with equal or varying pitch in slot, each turn of conductor adjacent to wall of the slot. Compared to the prior art, the invention save copper and ferrum, improve efficiency and easy to manufacture winding. It also applies to other cases except to replace common medium frequency machine.
Description
Technical field [0001] The invention relates to an improved structure of an intermediate frequency motor and a low-speed motor, and is particularly suitable for motors with a large number of poles. Background technique [0002] There are mainly two types of intermediate frequency motor technologies in the prior art. One is the induction sub-type, which induces higher harmonics on the basis of DC excitation. The disadvantages of these two methods are that only harmonic magnetic fields are used, resulting in a large motor, material consumption, low output, and low efficiency. Another intermediate frequency motor technology is the claw pole type. Although it is a motor with a higher number of poles, due to the claw pole structure, the magnetic circuit is longer, and the loss increases at higher frequencies. Limit high-frequency applications. In addition, the armature core of the prior art motor has a small number of poles and a small total number of slots. The slots cannot be too de...
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Login to View More IPC IPC(8): H02K1/16H02K3/12H02K3/28H02K19/10H02P9/04
CPCH02K3/28
Inventor 白侠斌丘雪明白晶辉
Owner SHENZHEN BEILAI ELECTRIC LAB