Abstract: A main field circuit of an electrical generator and associated system and method are disclosed. The main field circuit comprises a main field winding configured to conduct a main field current, and a counter-field winding arranged proximate to the main field winding. The main field circuit further comprises a switch element configured to selectively couple at least a portion of the main field current into the counter-field winding to reduce a magnitude of the main field current. Coupling at least a portion of the main field current into the counter-field winding may be performed responsive to one or predefined conditions, such as a predefined load fault condition and enabling a predefined field weakening operation.

Abstract: Electric motors are disclosed with coils which induce a magnetic flux field which by its relationship with ferromagnetic poles provide the motoring force without use of an auxiliary magnetic field. The motors may be employed with fixed or pivotably mounted brushes. Pivotable brushes for electric motor brushes are disclosed.

Abstract: A silicon-steel structure for motor comprises a silicon-steel plate made of magnetic material. The silicon-steel plate comprises a main body of rectangular shape when being expanded and a plurality of tooth portions on top and bottom sides of the main body. The tooth portions are integrally formed on top and bottom sides of the main body and have same pitch. Moreover, the tooth portions on top of the main body are complementary and staggered with the tooth portions on bottom of the main body. The tooth portions are bent vertically with respect to the main body and the main body is rolled to form a cylindrical shape to form a silicon-steel structure for motor.

Abstract: A universal motor having two carbon brushes (2a, 2b) and two series connected field coils (4a, 4b). The universal motor having an interference suppressing capacitor (5) with a first terminal (6a) connected directly to the first carbon brush (2a) and connected with a field coil (4a) in a conducting manner. The interference suppressing capacitor (5) also including a second terminal (6b) connected directly to the second carbon brush (2b) and connected to a power line (8b) in a conducting manner.

Abstract: A static excitation system that can eliminate shaft vibrations of a generator and overvoltage when it is underexited is provided. The static excitation system includes an initial excitation equipment; a step-down transformer; a 3-phase diode bridge; a boost chopper provided with a transistor and a resister, and maintaining DC voltage to be constant; a DC chopper provided with a plurality of transistors and diodes, and supplying DC power to a rotor of a generator; a boost controller for controlling the boost chopper; and a DC chopper controller for controlling the DC chopper, wherein, overvoltage applied on the excitation system when underexcited is eliminated owing to the boost chopper preventing any changes at an output terminal of the generator from being transferred to the excitation system, and maintaining the excitation DC voltage to be constant; and also owing to the DC chopper which is capable of 4 quadrant operation, hereby pole slipping of the generator can be prevented.

Abstract: The present invention relates to a mounting device (80) for reducing short-circuiting forces that are transmitted from a stator core to a stator body in a rotating electric machine comprising a stator with windings drawn through slots in the stator, wherein the stator core is composed of a number of packs (82), each of which includes a number of metal sheets, or of a number of metal sheets, each pack (82) or metal sheet having two identical grooves (84) arranged for cooperation with wedge members (86) designed to join together packs (82) or metal sheets, and wherein the stator body comprises beams (88), each connected to a wedge member (86). The mounting device (80) also comprises a connector (90) arranged through the beam (88) and secured in the wedge member (86) in order to connect the beam (88) and wedge member (86) in such a manner as to permit sliding between the wedge member (86) and the beam (88) in the event of short-circuiting. The windings also consist of high-voltage cable (10).

Abstract: A filter system, in particular for filtering the lubricant of an internal combustion engine, having at least two filter elements (19, 25) which can be connected successively to the oil circuit and a changeover valve (21) which feeds the oil to be cleaned to one of the filter elements, with the valve (21) being operated by the pressure difference between the clean oil side and the raw oil side of a filter element (19, 25, 26).

Abstract: An electric machine, such as a motor or a generator, comprises a stator having a plurality of stator poles defining a plurality of slots, a rotor positioned within the stator, and at least a two sets of stator windings wound on the stator poles and occupying said stator slots such that the boundary windings of each set of stator windings occupies a common slot. These boundary windings of each set of stator windings are non-overlapping and include insulation positioned between them. The sets of stator windings are wound on the stator poles in a single pitch winding configuration significantly reducing the number of wire crossings resulting. In particular, the endturns defined by the individual phase coils are non-intersecting. Such a machine provides continued operation under various fault conditions.

Abstract: A multiple output synchronous generator in accordance with the instant invention comprises a stator having a first stator winding having a number of poles p and a second stator winding having a number of poles 2*p*n where p and n are any whole numbers, the first and second stator windings being wound utilizing a 60.degree. phase belt winding configuration such that the first stator winding is magnetically decoupled from the second stator winding preventing interaction therebetween. The generator additionally comprises a rotor rotatably disposed within the stator defining an airgap therebetween. The rotor has a first field winding of a first polarity and a second field winding having a second number of windings wound thereon for generating a flux across the airgap such that the flux induces a voltage in the first and second stator windings.

Abstract: A brush and slip ring apparatus for an alternating current generator. A brush assembly is secured to a rotor shaft of the generator to rotate therewith. The brush assembly includes two axially spaced brushes that are pivoted to a brush support that is secured to the shaft. When the shaft is rotated, the brushes move outwardly away from the shaft due to centrifugal force. The brushes respectively engage two axially spaced fixed slip rings that surround the brush assembly. The brushes are maintained engaged with the slip rings due to centrifugal forces developed by the pivotally mounted brushes. The brushes are connected to a field coil of the rotor of the generator.

Abstract: Apparatus for providing selectively from time to time in the same member 11 either rotary motion 12 about an axis 13 or linear movement 14 in an axial direction from one position to another comprises: an electric motor 15 including a stator 16 comprising a housing 17 and a magnet 18 for providing a first magnetic field therein; a rotor 19 comprising an armature 20, for providing a second magnetic field, on a shaft 11; all of the above being coaxial about the axis 13; and a commutator 21 (mechanical or electronic) and associated circuitry 22 for conducting electrical energy to the motor 15 to provide, selectively, rotation 12 of the shaft 11 in a selected direction (clockwise or counterclockwise) and/or axial translation 14 of the shaft 11 in a selected direction (toward or away from the first magnetic field). For rotation, the magnetic fields are substantially perpendicular; for translation, they are substantially parallel.

Abstract: An electromotive machine has a stator provided with multiple sets of windings, each independently, electrically coupled to an electrical means, to establish separate power channels between the windings and the electrical means that allow for the simultaneous independent transmission of power through the channels when the machine is in operation. The electromotive machine may take either the form of a motor or a generator.