Optimal Design Method for High Speed ​​Torque of Low Voltage AC Asynchronous Motor

An AC asynchronous motor, optimized design technology, applied to asynchronous induction motors, electromechanical devices, electrical components, etc., can solve the problems of poor high-frequency torque characteristics of low-voltage AC asynchronous motors

Active Publication Date: 2018-01-23
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor high-frequency torque characteristics of low-voltage AC asynchronous motors

Method used

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  • Optimal Design Method for High Speed ​​Torque of Low Voltage AC Asynchronous Motor
  • Optimal Design Method for High Speed ​​Torque of Low Voltage AC Asynchronous Motor
  • Optimal Design Method for High Speed ​​Torque of Low Voltage AC Asynchronous Motor

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Embodiment

[0029] This embodiment optimizes the number of rotor slots of a low-voltage AC asynchronous motor with a rated power of 20Kw, a power supply DC voltage of 72V, a frequency of 0-300Hz, a number of pole pairs of 2, and a stator-rotor slot matching of 36 / 32. Since the driving object requires that the highest possible electromagnetic torque output can be obtained at high speed at a certain cost, it is considered to keep the stator and main dimensions of the motor unchanged, and optimize the design of the motor by increasing the number of rotor slots. The specific steps are as follows :

[0030] 1) First establish the motor model in the ansoft software, and obtain the parameters of the low-voltage AC asynchronous motor to be optimized: the stator winding resistance R 1 , the rotor winding converted resistance R 2 , the supply angular frequency ω on the stator side s , stator leakage reactance L 1σ , rotor slot converted leakage inductance L′ 2s , the converted leakage inductanc...

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Abstract

The invention discloses a high-speed torque optimization design method of a low-voltage AC asynchronous motor, which includes the following steps: 1) setting the number of rotor slots of the low-voltage AC asynchronous motor to be Z2, and obtaining the stator winding of the low-voltage AC asynchronous motor when it operates at high frequency Resistance R1, rotor winding converted resistance R2, stator leakage inductance L1σ, excitation inductance Lm, rotor converted slot leakage inductance L′2s, rotor converted end leakage inductance L′2e, rotor converted harmonic leakage inductance L′2d and rotor converted skew Slot leakage inductance L'2sk; 2) Establish optimization objective: min w(x); 3) Determine constraint conditions: W(x)≥a, a is a constant; 4) Optimize the objective function to obtain the optimal rotor The number of slots Z2, the low-voltage AC asynchronous motor adopts the number of rotor slots Z2 obtained in step 3). The invention improves the high-frequency torque characteristics of the low-voltage AC asynchronous motor by increasing the appropriate number of rotor slots.

Description

technical field [0001] The invention relates to the application of a low-voltage AC asynchronous motor in frequency conversion, in particular to the optimization of high-frequency electromagnetic torque. Background technique [0002] In the frequency conversion application of low-voltage AC asynchronous motor, due to the limited output voltage of the inverter, as the power supply frequency increases, the induced potential increases, which will reduce the feed-in current of the stator side, and at the same time, due to the decrease of the magnetic flux, The electromagnetic torque of the motor at high frequency is further reduced, which makes the high-frequency torque characteristics of the low-voltage AC asynchronous motor worse. Contents of the invention [0003] The purpose of the invention is to solve the problem of poor high-frequency torque characteristics of low-voltage AC asynchronous motors. [0004] The technical solution adopted in order to realize the object of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/02H02K15/02
Inventor 刘和平陈红岩刘庆许兴平王路平张煜昕涂郁潇颖邓力余传祥郑群英
Owner CHONGQING UNIV
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