Patent RU-2314625-C2 (RU)
Inventor: PASHUKOV EVGENIJ BORISOVICH
IPC: H02K1/16
Filed: 2005-11-21
Granted: 2008-01-10
Abstract: FIELD: electric engineering, namely - asynchronous electric machines, possible use in rocketry, shipbuilding, and certain other technological processes connected to centrifuging. 
     SUBSTANCE: device for creating a moving magnetic field includes stator of asynchronous multi-phased motor, made without a body, a yoke in each sheet of stator packet is positioned in the center, toothed zone - on periphery, bases of teeth of toothed zone are directed towards field rotation axis, their tops - away from the axis, and a multi-phased voltage winding is placed within grooves of toothed zone on outside. According to first variant of realization of claimed device, toothed zone consists of narrow and high teeth and narrow and deep grooves with maximally allowed number thereof, doubled total of heights of yoke and tooth substantially exceeds the distance between two adjacent teeth, and thickness of packet is increased, while external surface of stator is covered in thin and strong layer having properties of hermetic, thermal and electric isolation and non-magnetic properties, and aforementioned winding is connected to multi-phased supply of electric power with increased voltage and frequency. According to second variant of device realization, in grooves of toothed zone of stator, made similarly to first variant of device realization, control winding and excitation winding are placed on outside, but excitation winding is connected to one-phased electric power supply with increased voltage and frequency, and control winding is connected to control circuit. According to third variant of realization of device, multi-phased voltage winding is placed into grooves of toothed zone of stator on outside, while packet of stator yoke sheets is composite, each sheet of tooth is bent in form of U figure, packet of sheets of each tooth is U-shaped, packets of teeth are fastened on the packet of yoke and pressed to one another, and fixture elements are magnetic conductor, which is made with foliation of in longitudinal direction, and aforementioned multi-phased voltage winding is connected to multi-phased electric power supply with increased voltage and frequency. In accordance to the third variant of device realization, in grooves of toothed zone on the outside control winding and excitation winding are placed, with each yoke sheet bent, packet of yoke sheets is composite, each sheet of tooth is bent in form of U figure, packet of tooth sheets is U-shaped, teeth are held on yoke and pressed to one another, fixture elements are magnetic conductor, which is made with foliation in longitudinal direction, aforementioned excitation winding is connected to one-phased electric power supply with increased voltage and frequency, and control winding is connected to control circuit. According to second, third and fourth variants of realization of the device, stator is made without a body, and external surface of the stator is also covered in thin and strong non-magnetic layer, having properties of hermetic, thermal and electric isolation. 
     EFFECT: creation of rotary magnetic field on external surface of stator of asynchronous multi-phased motor for ensuring efficient centrifuging of liquid or gaseous environment capable of conducting electricity. 
     4 cl