The Research of Sing-Phase High Efficiency Motor

　　The Research of Sing-Phase High Efficiency Motor
　　This paper is mainly about high efficient single phase motor, including high efficient single phase induction motor and single phase permanent-magnet synchronous motor. The details are as follows:First, high efficient single phase motor is studied. The loss of single phase induction motor is analyzed, considering that the copper loss of single phase induction motor is high, a new winding, which is different with sinusoidal winding, is adopted, the principle of the new winding is generalized, the rate of slot full of the electric machine which adopts the new winding is increased, and the copper loss is decreased efficiently. The airspace harmonic magneto-motive neodymium prices potential of the electric machine which adopts the new winding and the tooth harmonic of electric machine are analyzed.
　　The symmetric operation of the double value capacitor single phase induction motor, the turns ratio of main phase winding to the auxiliary phase winding, the value of capacitor-start and capacitor-run, and the influence on the efficiency of electric machine when the running capacitor and the turns ratio are adjusted, are analyzed in this paper. In the end, CAD software is finished according to the characteristics of the single phase induction motor.Secondly, the single phase permanent-magnet synchronous motor is studied. The magnetic circuit of the single phase permanent-magnet motor is selected. The point of this paper is the research in the load characteristic of the single phase permanent-magnet synchronous motor. The variables of electric machine are changed into positive-order component and negative-order component by changing the windings and the weigh component, and then the http://www.999magnet.com/products/142-neodymium-prices positive-order component is decomposed to dq-axis component and the load characteristic of electric machine is calculated and the voltage iteration flowchart is accomplished. The property of d-axis armature reaction of the electric machine is analyzed.Finally, prototypes of this two kinds of electric machine are designed and the detailed experiments are carried out, after generalizing the experience the development and the experiments of the single phase motor. The performance indexes of the electric machines have reached the prospective requirements, the efficiency of the the single phase induction motor is 67.4% and the efficiency of the single phase permanent-magnet synchronous motor is 76.6%, and the experiments results are presented in this paper and are compared with common induction motor.