Abstract:
A decentralized motor drive arrangement provides high-voltage operational power and low-voltage standby power from a centralized distribution unit to remote motor drives using the same pair of interconnection power wires. The distribution unit includes a low- voltage power source which has one output terminal diode coupled to one of the output terminals of a high-voltage power source to form one output wire of the distribution unit. The other output terminals of the low-voltage and high-voltage power sources are directly coupled to form the other distribution unit outgoing power wire.
Abstract:
This invention relates to a motor control circuit (1) which increases the efficient power of Universal AC motors (2) used in actuating high capacity washing machines without leading to a reduction of life expectancy of current conducting components of the motor (2) like brush, collector etc.
Abstract:
An electric machine includes a stator defining multiple stator poles with associated stator windings configured to receive a stator current. The electric machine also includes a rotor defining multiple fixed rotor poles with associated rotor windings, wherein the rotor defines a field energizable by magnetic fields produced by the stator windings when receiving the stator current to produce relative motion between the rotor and the stator and wherein the rotor is maintained in synchronicity with the magnetic fields produced by the stator during operation of the electric machine. The electric machine also includes a rectification system configured control against an alternating current being induced in the rotor poles as the field is energized by magnetic fields produced by the stator windings when receiving the stator current.
Abstract:
This invention aims at developing an Induction Motor that consumes less power than existing Induction Motors. An efficient Induction motor comprises a stator that includes three field windings and a rotor that includes rotor conductors short-circuited at both ends by end rings located at both ends of rotor. A field winding comprises a number of pairs of North pole and South pole. There are three full-wave rectifiers. Each of the three full-wave rectifiers converts a phase current of a three phase alternating current supply into a unidirectional current varying with time and delivers the converted current exclusively to a field winding. As a result, poles of the field winding generate fluctuating magnetic flux. A rotor conductor cuts said fluctuating magnetic flux thereby inducing an emf in said rotor conductor and consequently generating current in it. The direction of said magnetic flux and the direction of said current flowing in said rotor conductor are perpendicular to each other. Said rotor conductor moves in a direction perpendicular to both the direction of said magnetic flux and said rotor conductor current thereby rotates the rotor.
Abstract:
Die Erfindung betrifft eine Schaltungsanordnung für ein Kraftfahrzeug. Die Schaltungsanordnung weist einen Elektromotor auf. Der Elektromotor weist eine Steuereinheit auf, wobei die Steuereinheit ausgebildet ist, den Elektromotor, insbesondere einen Stator des Elektromotors, zum Drehbewegen des Rotors anzusteuern. Erfindungsgemäß weist die Schaltungsanordnung einen steuerbar ausgebildeten Schalter mit einem Steueranschluss auf. Der steuerbar ausgebildete Schalter ist eingangsseitig mit einem Batteriepotenzial eines Bordnetzes des Kraftfahrzeugs, insbesondere trennbar, verbunden. Der steuerbar ausgebildete Schalter ist ausgangsseitig mit dem elektrischen Verbraucher, insbesondere dem Elektromotor, bevorzugt mit der Steuereinheit des Elektromotors verbunden. Die Steuereinheit weist einen Steuereingang zum Empfangen eines Aktivierungssignals zum Aktivieren des Verbrauchers, insbesondere im Falle eines Elektromotors zum Drehbewegen eines Rotors des Elektromotors auf. Die Steuereinheit ist mit dem Steueranschluss des steuerbar ausgebildeten Schalters verbunden und ausgebildet, den Steueranschluss zum Aktivieren des Verbrauchers in Abhängigkeit des Aktivierungssignals mit einem Schaltsignal zu beaufschlagen.
Abstract:
A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter. And a current control feedback loop (976) component that uses an established current control signal and a signal indicative of the current flowing through a stator winding (505,508) of the TPSRM to dynamically adjust a second parameter.
Abstract:
A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter. And a current control feedback loop (976) component that uses an established current control signal and a signal indicative of the current flowing through a stator winding (505,508) of the TPSRM to dynamically adjust a second parameter.
Abstract:
A method and an apparatus for sensorless profiling of a current waveform in a switched-reluctance motor (SRM) is disclosed. The apparatus comprises a switched-reluctance motor having at least one stator pole and at least one rotor pole, a phase inverter controlled by a processor, a load, a converter and a software control module at the processor. The current waveform sets a target magnitude for a programmable dwell angle that scales a programmable waveform shape. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The method reduces the overall radial force magnitude by compensating nonlinear torque production thereby reducing the acoustic noise reduction and torque ripple which results in computational efficiency of the SRM.