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A Calculation Method of 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 the winding conductor, complex mathematical operations, etc., can solve the problems of increasing the difficulty of calculating the distribution factor, and achieve the effect of unified calculation

Active Publication Date: 2022-05-03
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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  • A Calculation Method of Distribution Factor of Fractional Slot Concentrated Winding Unit Motor
  • A Calculation Method of Distribution Factor of Fractional Slot Concentrated Winding Unit Motor
  • A Calculation Method of Distribution Factor of Fractional Slot Concentrated Winding Unit Motor

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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 present invention relates to the technical field of electromagnetic performance calculation of permanent magnet motors, in particular to a method for calculating the distribution factor of a fractional slot concentrated winding unit motor, which satisfies gZ 0 =h(2p 0 ) ± κ (κ = 1, 2, 4 and g≠h ≠ 1), any unit motor winding can be compared to the basic unit motor winding arrangement, so that the unit motor winding arrangement has regular and concentrated distribution characteristics, And then calculate its distribution factor uniformly. At the same time, by establishing the connection between the fractional slot concentrated winding unit motor and its corresponding basic unit motor, the method converts the complex and diverse unit motor windings into regular centralized distributed windings, thereby realizing the distribution of fractional slot concentrated winding unit motors. The unified calculation of factors provides a theoretical basis for the calculation of permanent magnet motor distribution factors 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 Patents(China)
IPC IPC(8): G06F17/18G06F17/15H02K3/12H02K3/28
CPCG06F17/18G06F17/15H02K3/12H02K3/28
Inventor 郑军强茅靖峰
Owner NANTONG UNIVERSITY