What is permanent magnet synchronous motor? can we see the application of PMSM? Follow Xiaobian to find out.
It is a synchronous motor which is excited by permanent magnet to produce synchronous rotating magnetic field. As a rotor, permanent magnet produces rotating magnetic field. Under the action of rotating magnetic field, three-phase stator winding reacts through armature to induce three-phase symmetrical current. It can be used in agricultural production many mechanical equipment. For example, the elevators, air conditioners, blowers, cars so on around us have applications.
The operation principle of permanent magnet synchronous motor is the same as that of electric excitation synchronous motor, but it uses the flux provided by permanent magnet to replace the excitation winding of the latter, which makes the motor structure simpler.
After the permanent magnet material is embedded in the rotor, the rotor the stator magnetic field run synchronously in normal operation, the rotor winding has no induced current, no rotor resistance hysteresis loss, which improves the efficiency of the motor.
There is no induced current excitation in the rotor of permanent magnet synchronous motor, the stator winding presents resistive load, the power factor of the motor is close to 1, which reduces the stator current improves the efficiency of the motor. At the same time, the improvement of power factor improves the quality factor of power grid, reduces the loss of transmission transformation lines, reduces the capacity of transmission transformation, saves the investment of power grid.
There is no resistance loss in the rotor winding no reactive current in the stator winding, so the temperature rise of the motor is low.
The volume, weight materials of PMSM with the same capacity can be reduced by about 30%. The permanent magnet synchronous motor system adopts a fully enclosed structure, which is free of transmission gear wear, transmission gear noise, lubricating oil maintenance.