跳至主要内容

electric driving control system schematic diagram




评论

发表评论

此博客中的热门博文

Advantages and disadvantages of rare earth permanent magnet synchronous motor compared with squirrel-cage asynchronous motor

A ：high efficiency and energy saving 1) no slip error, no fundamental wave loss of iron and copper on the rotor; 2) the rotor permanent magnet is used for excitation, and the power factor can reach 1, saving the reactive power. On the other hand, the stator current decreases, the stator copper loss decreases, and the efficiency increases. 3) the polar arc coefficient is generally greater than the polar arc coefficient of the asynchronous motor. When the power supply voltage and the stator structure are fixed, the average magnetic density is smaller than the asynchronous motor and the iron loss is smaller. 4) stray loss of rare earth permanent magnet synchronous motor: it is generally believed that the non-sinusoidal magnetic field of the permanent magnet increases the stray loss, but on the other hand, the large air gap of the rare earth permanent magnet synchronous motor reduces the stray loss. B ：small size, light weight, high power density 1) analysis from the persp...
发表评论
阅读全文

one kind of typical permanent magnet motor（PMSM）

EV/HEV driving motor supplier , LEGO, China yulongzhu@lego-motors.com
发表评论
阅读全文

The general tests of electric motors：2

2. Determination of dc resistance of winding: 1) Significance of dc resistance measurement: The dc resistance of the windings in cold state is one of the main parameters of three-phase asynchronous motors. By comparing the measured value of the resistance of the windings with the design value, it is possible to check whether the windings have broken wires and short-circuit between turns, whether the welding parts have virtual welding or open welding, whether the contact points have bad contact and other phenomena. 2) Dc resistance measurement method: Measuring the dc resistance of the motor should be done when the winding is cold. First, place the motor indoors for a period of time, and measure the temperature of the motor winding end or core with a thermometer. At this time, the measured temperature is the actual temperature of the winding in the cold state. If the temperature of the winding end or core cannot be measured, the temperature of the housing may be substituted...
发表评论
阅读全文