Variable Speed Drive for Single Phase Motor

This permanent magnet synchronous variable frequency motor developed and manufactured by Taizhou Inwon Technology Co.,ltd is a type motor for farm machine. Rated power of motor is 3.5kw and rated rotating speed is 300r/min. It adopts advanced electro-magnetic proposal and high performance permanent magnet materials, with characteristics of big starting torque, small size, light weight, low noise, strong anti-magnet loss capability, high efficiency, big power density and etc.

A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for an axial flux topology.
Permanent magnet motors are more efficient than induction motor or motors with field windings for certain high-efficiency applications such as farm machine. Tesla's chief motor designer was quoted discussing these advantages, saying:
It's well known that permanent magnet machines have the benefit of pre-excitation from the magnets, and therefore you have some efficiency benefit for that. This is because for the specification of the performance and efficiency, the permanent magnet machine better solved our cost minimization function, and it was optimal for the range and performance target.

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