Testing of China ac synchronous motor
On June 2, 2010, the Ministry of Finance and the National Development and Reform Commission jointly promulgated the "Notice on the Issuance of the Implementation Rules for the Promotion of High-Performance Electric Vehicles for Energy Saving Products", which included high-efficiency motors in the scope of implementation of the Huimin project for energy saving products and adopted financial subsidies to promote them.
The adoption of frequency conversion speed regulation technology is another effective energy saving measure. The high efficiency motor and the frequency converter motor test put forward higher requirements for the function and performance of the test equipment. In order to accurately obtain the efficiency of the motor, a broadband power analyzer with a microprocessor and a higher accurate frequency converter / sensor should be used.
Establishment conditions
In order to establish the mathematical model of the synchronous motor, it is necessary to make the necessary assumptions for the actual three-phase synchronous motor in order to simplify the analysis and calculation. It is generally assumed that:
(1) The permeability of the motor magnet part is constant, not only ignoring the influence of hysteresis and magnetic saturation, but also not counting the influence of Eddy currents and skin accumulation.
(2) For longitudinal and transverse shafts, the motor rotor is structurally completely symmetrical.
(3) The position of the three windings of the stator differs by 120 ° from each other in space, and the three windings are exactly the same in structure. At the same time, they all generate sinusoidal distribution of magnetic potential in the air gap.
(4) The slots and ventilation ducts of the stator and rotor do not affect the inductance of the stator and rotor of the motor, that is, the stator and rotor of the motor are considered to have a smooth surface.
