Alternating current asynchronous motor and phase change starting method thereof

Abstract

The invention relates to an alternating current asynchronous motor and a phase change starting method thereof. The motor comprises six groups of stator coils U1, U2, V1, V2, W1 and W2, wherein the end head of the U1 is connected with the end head of the U2 in parallel, and a terminal block 1U is led out; the end head of the V1 is connected with the end head of the V2 in parallel, and a terminal block 1V is led out; the end head of the W1 is connected with the end head of the W2 in parallel, and a terminal block 1W is led out; the end tail of the U2 is connected with the end tail of the V1 in parallel, and a terminal block 2V is led out; the end tail of the U1 is connected with the end tail of the W2 in parallel, and a terminal block 2U is led out; and end tail of the V2 is connected with the end tail of the W1 in parallel, and a terminal block 2W is led out. The six groups of stator coils are provided with six terminal blocks, the terminal blocks 1U, 1V and 1W of the motor are respectively connected with a three-phase power supply when the motor is started, and the stator coils are in delta connection; and during operation, the stator coils are in star connection. The alternating current asynchronous motor is suitable for heavy-duty starting, is simple to wire and has the advantages of low cost and simple motor control mode.

Description

technical field [0001] The invention belongs to the technical field of starting an AC asynchronous motor, in particular to an AC asynchronous motor and a commutation starting method thereof, and is particularly suitable for an AC asynchronous motor used in an electric vehicle. Background technique [0002] With the rapid development of power electronics technology, three-phase squirrel-cage asynchronous motor has become the mainstream of electric drive. At present, the commonly used starting methods include star-delta starting method, reactor decompression starting method, autotransformer starting method and Yanbian delta starting method, but these starting methods have some disadvantages. The star-delta starting method is only suitable for no-load or light load. In the case of load starting, the reactor decompression starting method and the autotransformer starting method are suitable for heavy-load or full-load starting. However, when using these two methods to start, addi...

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Problems solved by technology

At present, the commonly used starting methods include star-delta starting method, reactor decompression starting method, autotransformer starting method and Yanbian delta starting method, but these starting methods have some disadvantages. The star-delta starting method is only suitable for no-load or light load. In the case of load starting, the reactor decompression starting method and the autotransformer starting method are suitable for heavy-load or full-load starting. However, when using these two methods to start, additional equipment is required, and the cost is high. The Yanbian triangle starting method is generally applicable. It is used for heavy-duty starting, but the stator winding of the motor is relatively complicated, and there are nine terminals, the manufacturing process of the motor is cumbersome, the control circuit is complicated and the control method is cumbersome

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