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Method for calculating distribution factor of fractional slot concentrated winding unit motor

A technology of centralized winding and distribution factor, which is applied to the shape/style/structure of winding conductors, complex mathematical operations, etc., can solve the problem of increasing the difficulty of distribution factor calculation, and achieve the effect of unified calculation.

Active Publication Date: 2021-12-28
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the slot vector star diagrams of unit motors vary greatly with the diversity of slot and pole coordination, and the slot vector star diagrams of different order harmonics of the same unit motor are also different. These factors greatly increase the difficulty of calculating the distribution factor

Method used

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  • Method for calculating distribution factor of fractional slot concentrated winding unit motor
  • Method for calculating distribution factor of fractional slot concentrated winding unit motor
  • Method for calculating distribution factor of fractional slot concentrated winding unit motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] refer to figure 2 , figure 2 It is the vector star diagram of the local slot of the first type unit motor. due to N coil It is an odd number, so this type of unit motor can only adopt a double-layer winding structure, and its winding arrangement law is: Q coils are continuously arranged in a 2π / m interval, only the coils of this phase are placed in this interval, and Q coils In this interval, positive and negative are arranged alternately. The slot vector marked by the dotted arrow indicates that the direction of the vector needs to be determined according to the number of poles of the motor slot of the specific unit. In the figure, α=h(2π / Z 0 ), l=(Q-1) / 2. The vector sum and algebraic sum are calculated respectively, and then the distribution factor of the v-order harmonic of this type of unit motor can be calculated.

Embodiment 2

[0068] refer to image 3 , image 3 It is the vector star diagram of the local slot of the second type of unit motor, and it is divided into two cases according to the parity of Q / 2, but the winding arrangement is exactly the same, specifically: Q coils are placed in two π / m intervals in equal quantities , the space phase difference between these two intervals is π, and only the coils of this phase are placed in these two intervals, Q / 2 forward coils are placed in one interval, and Q / 2 reverse coils are placed in the other interval, as shown in Fig. middle Indicates that Q / 4 is rounded down. Similarly, the vector sum and algebraic sum of these Q coils can be obtained to obtain the distribution factor of the vth harmonic in this type of situation.

Embodiment 3

[0070] refer to Figure 4 , Figure 4 It is the vector star diagram of the local slot of the motor of the third type of unit. At this time, Q=N coil / 2, the arrangement rule is: Q coils are continuously arranged in a π / m interval, and only coils of this phase are placed in this interval, and Q coils are arranged alternately in positive and negative directions in this interval. After vector synthesis, the distribution factor of the vth harmonic can be obtained.

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Abstract

The invention relates to the technical field of permanent magnet motor electromagnetic performance calculation, in particular to a fractional slot concentrated winding unit motor distribution factor calculation method, which is characterized in that a slot pole is introduced to cooperate with a normalized ordered number pair (g, h), the relationship gZ0 = h(2p0)+ / -k (k= 1, 2, 4, and g is not equal to h which is not equal to 1) is satisfied, any unit motor winding can be analogous as a basic unit motor winding arrangement mode, the unit motor winding arrangement has a regular concentrated distribution characteristic, and then the distribution factor of the unit motor winding arrangement is calculated in a unified mode. Meanwhile, according to the method, by establishing the relation between the fractional slot concentrated winding unit motor and the corresponding basic unit motor, unit motor windings with complex and diverse structural forms are converted into regular concentrated distributed windings, so that the unified calculation of distribution factors of the fractional slot concentrated winding unit motor is realized; and a theoretical basis is provided for permanent magnet motor distribution factor calculation and space harmonic analysis.

Description

technical field [0001] The invention relates to the technical field of electromagnetic performance calculation of permanent magnet motors, in particular to a method for calculating distribution factors of fractional slot concentrated winding unit motors. Background technique [0002] The distribution factor directly characterizes the magnitude of the distribution effect of the fractional slot concentrated winding permanent magnet motor, which is not only a concentrated expression of the electromagnetic performance of the permanent magnet motor, but also the basis for calculating the winding factor and analyzing the harmonics of the magnetomotive force. Usually, the calculation of the motor distribution factor requires the use of the slot vector star diagram, specifically: based on the principle of maximum synthetic magnetomotive force, the slot vectors formed by all the coils belonging to one phase are vector superimposed, and then compared with their algebraic sum, the distr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06F17/15H02K3/12H02K3/28
CPCG06F17/18G06F17/15H02K3/12H02K3/28
Inventor 郑军强茅靖峰
Owner NANTONG UNIVERSITY