Asynchronous slip-ring motor synchronized with permanent magnets

Permanent Magnets Synchronous Motor Control Theory

One way of controlling AC motors for variable speed applications is through the open loop scalar control, which represents the most popular control strategy of squirrel cage AC motors. Nowadays it is used in applications, where information about the angular speed need not be known. It is suitable for a wide range of drives as it ensures robustness at the cost of reduced dynamic performance. Typ...

Synchronous Motor with Hybrid Permanent Magnets on the Rotor

Powder metallurgy allows designers of electric motors to implement new magnetic circuit structures. A relatively new concept is the use of a magnet system consisting of various types of magnets on one rotor, for example sintered and bonded magnets. This concept has been applied to the design and manufacture of the four-pole rotor of a synchronous motor with 400 W power and a rotational speed of...

Difference between Slip Ring Motor with Conventional Drive and Squirrel Cage Motor with Variable Speed Drive

This paper shows a comparison simulation results for two controllers using the same name plate of 2750 KW, 6.6 KV, 50 HZ for wound and squirrel cage motors using two methods of controlling, the first method is achieved by a conventional method and the second method is achieved by a frequency inverter respectively. Keywords— Squirrel cage and slip ring motors, conventional and VSD controllers si...

Axial Flux Interior Permanent Magnet Synchronous Motor with Sinusoidally Shaped Magnets

A new permanent magnet design for axial flux interior permanent magnet (AFIPM) motor is described in this paper. Poleshoes are traditionally used to produce sinusoidal flux linkage and sinusoidal EMF especially in the case of radial flux synchronous machines. Poleshoes are not a practical solution in the case of axial flux PM machine. The use of poleshoes in the production of sinusoidal back EM...

Slip Power recovery system in Three Phase Slip Ring Induction motor