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Electronically switched reluctance motor
| Details |
Inventors: Lungu, Iancu;
Assignee:
Primary Examiner: Tamai; Karl
Assistant Examiner:
Attorney, Agent or Firm: Kelly Bauersfeld Lowry & Kelley, LLP
This motor has a special magnetic circuit which enables it to be powered by a very simple electronic circuitry. This motor has, according to the figure, four U-shaped Yokes (11, 112) with eight unevenly spaced poles (111) surrounding a rotating six-pole rotor (12). The motor is driven by two power semiconductor devices (21) controlled from a Hall sensor (31). The demagnetising energy being set free by switching off the main windings (112X) will be directed through the coupling diodes (22) as premagnetising energy to the secondary windings (113Y) of the following phase (Y). This motor with high speed capability which is inexpensive, simple and quietly running can be mainly used for pumps, fans and blowers for gases and fluids. |
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DETAILED DESCRIPTION What is claimed is: 1.
Electronically switched reluctance motor with wound yokes (11) magnetically separated from each other for the generation of a pulsating magnetic field and with a rotor (12) that is rotatable in relation to the yokes (11) with the rotor poles (121) which are attractable by the poles (111) of the yokes, in which case this atraction in dependence of the position of the rotor poles (121) relative to the poles (111) of the wound yokes (11) is electronically controllable, while at least one winding (112) of a yoke (11) is switchable by means of a power semiconductor (21) in series with a d.
c.
voltage source and the power conductor (21) is controllable in dependence of the position of the rotor poles (121) relative to the poles (111) of the yokes (11), the poles (111) of the wound yokes (11) as well as those of the rotor (121) are disposed in pairs and diametrically symmetrical relative to the rotating shaft (52) of the motor and wherein, between the rotor poles (121) of the rotor (12), non-magnetic gaps (122) exist and the rotor poles (121) are connected by a yoke (123), characterized in that the yokes (11) are U-shaped and the number of U-shaped yokes (11) is four, the yokes (11) carry windings (112), which, on a circular circumference, form eight magnetic poles (111), the number of the rotor poles (121) of the rotor (12) is six and the distance between the external corners of the poles (111X,111Y) of adjacent yokes within the region of the air gap is smaller than the distance between the internal corners of the two poles of a yoke (11) within the region of the air gap.
2.
Motor according to claim 1, characterized in that it is an electronically commutated two phase (X, Y) motor.
3.
Motor according to claim 1, characterized in that the distance between the external corners of the poles (111X, 111Y) of adjacent yokes (11) within the region of the air gap is selected to be small that it is optimized with regard to the magnetic losses, while the distance is at least three times as large as the air gap
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Generators or Motors 
