Three-phase asynchronous motor stator winding turn number distribution method for fans
A three-phase asynchronous, motor stator technology, applied to asynchronous induction motors, electromechanical devices, electrical components, etc., can solve problems such as hidden dangers of motor safety and high cost, different rotor induced magnetic field strengths, and reduced motor manufacturing qualification rate, etc. The effect of withstand voltage breakdown, reduction of magnetic field strength, and improvement of manufacturing yield
Active Publication Date: 2019-12-13
JIANGSU FULIHUA GENERAL EQUIP
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Problems solved by technology
Due to the different pitches in each phase, the magnetic flux density in each pitch range is different, resulting in different magnetic field strengths induced by the rotor, resulting in increased electromagnetic noise and vibration
In the motor manufacturing process, since the winding coil with a small pitch cannot release the stress, the winding coil with a small pitch is harder than the coil with a large pitch, and embedded in the stator slot, it is easy to cause voltage breakdown and reduce the qualified rate of motor manufacturing , the motor has problems such as potential safety hazards and high cost
The fan using the conventional design of three-phase asynchronous motor with equal number of turns does not run smoothly and has high noise
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[0016] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0017] According to the above-mentioned method for distribution of the number of turns of a three-phase asynchronous motor stator single-layer chain winding for a fan, any one of phase A, phase B, and phase C satisfies the following conditions:
[0018] (1) In the first pitch, the second pitch...the n-1 pitch and the n-th pitch arranged in sequence, the number of winding turns increases in turn, and the number of winding turns in the n-th pitch is the same as that of the n-1th pitch. The ratio of the number of winding turns in the pitch is a, where a≥1.02, and the number of winding turns is an integer.
[0019] (2) Set the number of turns of the standard winding as b, in this embodiment, the number of turns of the standard winding is the number of turns when the number of turns of the conventional three-phase asynchronous motor is designed;
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The invention discloses a three-phase asynchronous motor stator winding turn number distribution method for fans. Any one of the phase A, the phase B and the phase C meets the following conditions: ina first pitch, a second pitch... a (n-1)th pitch and an nth pitch which are arranged in sequence, the number of turns of winding is increased in sequence, the ratio of the number of turns of windingin the nth pitch to the number of turns of winding in the (n-1)th pitch is a, a is greater than or equal to 1.02, and the number of turns of winding is an integer; and the number of turns of a standard winding is set to be b, the number of turns of winding in a c-th pitch is b when n is equal to 2*c (c is greater than or equal to 1 and is an integer), and the number of turns of winding in a (c+1)th pitch is b when n is equal to 2*c+1 (c is greater than or equal to 1 and is an integer). The three-phase asynchronous motor stator winding turn number distribution method for fans can improve the efficiency of motors, reduce the vibration of stators and reduce electromagnetic noise. The method can reduce the voltage breakdown resistance of motors, improve the qualification rate of motor manufacturing, improve the safety of motors and lower the cost of motors. When applied to the field of fans, the method can enable fans to run stably and at low noise.
Description
technical field [0001] The invention relates to a method for distributing the number of turns of a stator winding of a three-phase asynchronous motor for a fan. Background technique [0002] In the three-phase asynchronous motor used in the existing fan, the number of turns in each slot of the single-layer chain winding of the stator is equal. Due to the different pitches in each phase, the magnetic flux density in each pitch range is different, resulting in different strengths of the rotor induced magnetic field, resulting in increased electromagnetic noise and vibration. In the motor manufacturing process, since the winding coil with a small pitch cannot release the stress, the winding coil with a small pitch is harder than the coil with a large pitch, and embedded in the stator slot, it is easy to cause voltage breakdown and reduce the qualified rate of motor manufacturing , The motor has problems such as potential safety hazards and high cost. The fan using the convent...
Claims
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IPC IPC(8): H02K17/12
CPCH02K17/12H02K2213/03
Inventor 张唯沈坤华
Owner JIANGSU FULIHUA GENERAL EQUIP