Stator winding structure of asynchronous motor
An asynchronous motor and stator winding technology, which is applied to asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of insufficient efficiency, large torque output fluctuation, and many harmonic components of the motor, and achieve the effect of optimizing the magnetic field.
Inactive Publication Date: 2010-03-03
CHONGQING CHUANYI AUTOMATION +1
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Problems solved by technology
Existing Y, Y2 series three-phase motor stator windings such as figure 1 As shown in , the three-wire three-phase sinusoidal winding distribution is adopted, and the X, Y, and Z three are 120° to each other. The induction cage rotor realizes the asynchronous rotation of the rotor. The three-phase output voltage waveform is as follows figure 2 As shown in , the sine waves generated by the three phases differ from each other by 120°, the effective value of the obtained voltage is not high, and the efficiency is not high enough, generally around 75%, and there are many harmonic components of the motor, and the torque output fluctuates greatly
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[0013] Such as image 3 As shown in , the present invention includes main windings X, Y, Z, auxiliary windings X', Y', Z' and operating capacitors C, and the auxiliary windings X', Y', Z' are respectively connected in series with each operating capacitor C , and then respectively connected in parallel with the corresponding main windings X, Y, Z, and finally connected to the power frequency three-phase power supply, wherein the auxiliary winding lags behind the main winding by 30° mechanical angle, and the running capacitor connected in series with the auxiliary winding will The auxiliary winding phase shifts by 90°, so that all windings form a 60° phase angle, forming a circular magnetic field as much as possible, and the induction rotor runs stably.
[0014] Its three-phase output voltage waveform is as follows Figure 4 as shown in the figure 2 Compared with the output voltage of the slanted part, the magnetic field is further generated, so that the electric current rate...
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The invention relates to a high-efficiency asynchronous motor, in particular to a stator winding structure of an asynchronous motor, comprising main windings, auxiliary windings and running capacitors, wherein the main windings divide a phrase periphery evenly, the number of the auxiliary windings is as same as the number of the main windings, and the running capacitors are firstly respectively connected with the auxiliary windings in series and then are correspondingly connected to the main windings in parallel. The auxiliary windings which lag behind the main windings are arranged among themain windings, and running capacitor shaft phrases are connected among the auxiliary windings in series and are combined into the main windings, thereby optimizing a magnetic field. Compared with thecommon three-wire three-phrase asynchronous motor, the efficiency of the asynchronous motor is increased by about 15 percent.
Description
technical field [0001] The invention relates to a high-efficiency asynchronous motor, in particular to a stator winding structure of the asynchronous motor. Background technique [0002] Energy saving and consumption reduction is a permanent subject of human beings, especially in developing countries, it is extremely important. According to the work report of the central government, more than 2 / 3 of my country's electric energy is consumed by electric motors. Therefore, improving the efficiency of electric motors will be an energy revolution. This type of motor is widely used in various machinery, such as lifting, transportation, packaging, printing machinery and other fields. Existing Y, Y2 series three-phase motor stator windings such as figure 1 As shown in , the three-wire three-phase sinusoidal winding distribution is adopted, and the X, Y, and Z three are 120° to each other. The induction cage rotor realizes the asynchronous rotation of the rotor. The three-phase out...
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Inventor 张文兵陈德平
Owner CHONGQING CHUANYI AUTOMATION