SINGLE-VALVE CONTACT-FREE DC MACHINE Russian patent published in 2009 - IPC H02K29/00 H02K21/12 

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering, particularly, to electric machine referred to contact-free d.c. electric machines. The single-valve contact-free d.c. machine, which is the subject of this invention, contains armature and inductor. According to the invention, the armature is comprised of two toroidal windings with ferromagnetic cores being electrically coupled between each other. The common terminal of both cores is connected to the d.c. voltage source through the valve and implemented as a fixed element. On the contrary, the inductor is made movable and represented as a hollow cylindrical magnetic core. Four permanent bar magnets with concave poles are put on each end of the above-mentioned magnetic core in crosslike order. By means of small gaps, convex N-poles of the first four magnets are separated from the internal surface of one toroidal winding. The same convex S-poles of the second four magnets are separated from the similar surface of the other winding by the same small gaps. Direct currents induced in generating mode are free from pulsation. Single voltage pulses of high amplitude may be used to design high-voltage units without step-up transformer or multiplying circuits, for example, electric ozonators.

EFFECT: simple design and improved electro-mechanical characteristics of dc machine, reduced price of dc machine.

2 dwg