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Class 363/9 - Combined phase and frequency conversion (i.e., Ph1f1-Ph2f2)


Subclass of Class 363 - Electric power conversion systems
Definition: Subject matter wherein the system includes phase and frequency
No. of patents: 14
Last issue date: 09/27/2011


NumberTitleIssue Date
8027173Apparatus for providing AC voltage
An apparatus for providing an AC voltage includes a synthesizer for generating at least one periodic output voltage signal, each periodic output voltage signal having an output frequency. The synthesizer is supplied by an input AC voltage having an input frequency, ...
09/27/2011
7706151Method and apparatus for multi-phase power conversion
A system and method for power conversion synchronizes multiple phases at a desired phase angle difference. The power conversion involves variable frequency switching, fixed on-time and provides power factor correction. A relative measure of a phase angle difference ...
04/27/2010
7701730Method and apparatus for power converters having phases spaced at desired phase angles
A system and method for power conversion synchronizes multiple phases at a desired phase angle difference. The power conversion involves variable frequency switching, fixed on-time and provides power factor correction. A relative measure of a phase angle difference ...
04/20/2010
7383110Motor control device and electric power steering device
A motor control device is provided, wherein an electric power (P) consumed by the brushless DC motor is inferred from three parameters including motor phase currents (I) flowing through at least two phases of three phases of the brushless DC motor, motor phase volta...
06/03/2008
7088027Rotating asynchronous converter and a generator device
The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second...
08/08/2006
6972976Compensation method for a voltage unbalance
The invention relates to a method for compensating for a voltage unbalance in an electrical network, which is fed by using an apparatus based on controlling a flux linkage vector or a voltage vector. Concerning the apparatus based on controlling the flux linkage vec...
12/06/2005
6933704Slip-inducing rotation starting exciter for turbine generator
A dynamoelectric machine combining the functions of an exciter, a turning motor, and a starting motor for a turbine. The machine operates in a first mode where the slip between a first stator winding and a first armature winding is positive and thus the magnetic fie...
08/23/2005
5856712Uninterruptible power supply method
A method for providing an uninterruptible power supply to a load both at ordinary times and in an emergency. At ordinary times, commercial AC input power is modulated into high-frequency AC power, which is then applied to a primary winding of a high-frequ...
01/05/1999
4706175Single phase to polyphase bridge-type frequency multiplier
A single to multiphase AC frequency conversion technique is provided using H-switches. A plurality of H-switches are toggled in a composite coordinated but irregular timing pattern under control of logic means to yield a plurality of chopped sinusoid swit...
11/10/1987
4706174Single phase to multiphase frequency multiplier
A single to multiphase AC frequency conversion technique is provided by alternately switching between a pair of AC power lines at a plurality of sets of coordinated but irregular times to yield a plurality of chopped sinusoid switched output waveforms eac...
11/10/1987
4355351High repetition rate power pulse generator
Disclosed is a class of power converters which extract electric energy from a source of A.C. or D.C. power and transform this energy to a desired and closely controlled voltage level for use by a pulse demanding load such as a pulsed radar or laser system...
10/19/1982
4096557Controllable four quadrant a.c. to a.c. and d.c. converter employing an internal high frequency series resonant link
Disclosed is a bilateral device to transform a.c. polyphase power to controllable a.c. or d.c. power, or to perform this transformation in reverse, by use of a single high frequency link comprising series resonant circuits. A cyclo-up converter transforms...
06/20/1978
4039910Dynamoelectric machine
A dynamolectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The secondary winding is connected such that at least two frequ...
08/02/1977
4039922Method of converting phase and frequency using a dynamo-electric machine
A dynamoelectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The secondary winding is connected such that at least two freq...
08/02/1977
 
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