|
Match
|
Document |
Document Title |
|
|
7483282 |
PWM method for cycloconverter
A method of using a cycloconverter switches a first switch of the first topology type to an on state after a magnitude of a current through an output inductor becomes less than a predetermined...
|
|
|
7027311 |
Method and apparatus for a wireless power supply
An apparatus for a wireless power supply including a mechanism for receiving a range of RF radiation across a collection of frequencies. The apparatus includes a mechanism for converting the RF...
|
|
|
6343021 |
Universal input/output power supply with inherent near unity power factor
An electronic method and apparatus are described for an isolated, universal input, power supply in the form of a single-ended resonant converter that utilizes capacitive energy storage versus...
|
|
|
6018466 |
Electronic signal conditioner
An electronic signal conditioner (ESC) (10) that can be designed to operate a differential capacitive load (90) or a single-ended capacitive load (92). The ESC (10) is disclosed in four design...
|
|
|
5969966 |
Power converting apparatus and method using a multiple three-phase PWM cycloconverter system
A power converting apparatus and a power converting method for driving a high voltage AC motor at a variable speed. Conventional invertor systems cannot solve technical subjects such as energy...
|
|
|
5929586 |
Vehicular motor driving apparatus
A vehicular motor driving apparatus includes a control unit 15 for drive-controlling a motor by PWM-drive-controlling a motor driving circuit based on a motor starting signal. The control unit has...
|
|
|
5771471 |
Charge regulator for a radio telephone
An electronic device, such as a radiotelephone, is connectable to a variable-level power source. The electronic device includes a rechargeable power source which is repowered responsive to...
|
|
|
5737196 |
Electrical power generating system producing alternating and direct current
The present invention is an electrical power generating system and method of operation. An inverter (18) is responsive to a DC potential for producing a fundamental frequency alternating current...
|
|
|
5663878 |
Apparatus and method for generating a low frequency AC signal
An apparatus and method for generating a low frequency AC signal such as a ringing voltage signal for a telephone subscriber interface unit or the like. The apparatus comprises an oscillator which...
|
|
|
5652699 |
High-voltage and high-power stabilized DC power supply using modified sine wave output 3-phase inverter
A stable DC power system of high-voltage and good-output performance is provided by adding a 3-phase inverter, whereby modified waveform for an output control is produced and a filter to a...
|
|
|
5640311 |
Miniaturized high frequency direct current power supply
A power supply is disclosed which is compatible with modern thin film technology which has an overall size compatible with modern miniaturized electronic components. Input power having an...
|
|
|
5590031 |
System for converting electromagnetic radiation energy to electrical energy
A system is disclosed for converting high frequency zero point electromagnetic radiation energy to electrical energy. The system includes a pair of dielectric structures which are positioned...
|
|
|
5473530 |
Four-quadrant pulse width modulated DC/AC converter
A pulse width modulated DC/AC converter includes an input circuit galvanically insulated from an output circuit. The input circuit includes two branches connected in parallel to a pair of input...
|
|
|
5363286 |
High voltage generator
A high voltage generator comprises a transformer unit for boosting an inputted AC voltage and a rectifier unit for rectifying the AC voltage boosted by the transformer unit, the transformer unit...
|
|
|
5321596 |
DC/DC/AC power supply for a subscriber interphase unit
A DC to DC switch mode power supply for a service subscriber interface unit of a fiber optic network includes a source of DC primary power, a main DC to DC switched mode power supply connected to...
|
|
|
5285365 |
Power conversion system, method for controlling the same, and uninterruptible power supply using the same
A three-phase a.c. uninterruptible power supply includes a transformer providing isolation between an input and an output, a single-phase inverter, and a cycloconverter. The uninterruptible power...
|
|
|
5274538 |
Power conversion apparatus
A power conversion apparatus comprises an inverter circuit for converting DC power into AC power which has a first frequency; a transformer connected to the inverter circuit. A cyclo converter...
|
|
|
5272612 |
X-ray power supply utilizing A.C. frequency conversion to generate a high D.C. voltage
An output voltage of an A.C. power source is input to an frequency converter and the frequency thereof is increased. A plurality of high voltage transformers of small capacity each of which has a...
|
|
|
5270914 |
Series resonant converter control system and method
An apparatus and method is disclosed for an improved control system for a series resonant converter for transferring power between a source and a load. The control system comprises a series...
|
|
|
5159539 |
High frequency DC/AC power converting apparatus
A DC-to-AC electric power converting apparatus includes: an inverter circuit for converting DC electric power into AC electric power; a transformer connected to the inverter circuit; a...
|
|
|
5053936 |
Frequency/voltage converting device
A frequency/voltage converting device includes a frequency/voltage converting means for converting a DC voltage corresponding to the frequency of an input signal, a reverse-polarity ripple voltage...
|
|
|
5010471 |
Three-phase AC-to-AC series resonant power converter with reduced number of switches
An apparatus and method is disclosed for an improved AC--AC series-resonant converters incorporating power pulse modulation with internal frequencies of tens of kHz is applied to a series-resonant...
|
|
|
4969080 |
A method of decoupling a three-phase converter
A method of operating a three-phase converter to produce a signal at an output frequency by decoupling and digitally sampling inverter input signals and load voltage signals and feeding the...
|
|
|
4931919 |
System for converting variable frequency multiple phase alternating current into constant frequency multiple phase alternating current with neutral
A system for converting variable frequency multiple phase current into multiple phase current of constant frequency with a neutral having a multiple phase inverter with a neutral (N) is disclosed....
|
|
|
4914373 |
Generator set for use on a building site
The generator set comprises an internal combustion engine (5) driving a three-phase generator (6). The latter is surmounted by a casing (7) containing a converter (8) which is supplied with power...
|
|
|
4878163 |
Pulse width modulated inverter with high-to-low frequency output converter
In a power conversion system, a DC voltage of a DC power supply is converted into a predetermined high-frequency voltage by an inverter, and a high-frequency low voltage generated from the inverter...
|
|
|
4868462 |
High voltage transformer for high frequency medical X-ray generator
A high voltage transformer assembly for use in a high frequency medical X-ray generator comprises a plurality of transformers, a plurality of filter capacitors, and a pair of capacitor printed...
|
|
|
4866585 |
AC to DC solid state power supply using high frequency pulsed power switching
A highly innovative new technique of developing AC to DC power sources for various applications has been described. Such technique of generating DC power is different from the conventional linear...
|
|
|
4855887 |
Current and frequency converter having means to reduce switching losses
A power conversion apparatus comprises an inverter for converting a voltage of a DC power source into AC power having a frequency higher than the commercial frequency, a transformer, fed by the...
|
|
|
4846579 |
Frequency-voltage converting circuit
A quick-response frequency-voltage converting circuit which generates a voltage signal responding to a reciprocal of the period of an input signal, and sample-holds this voltage signal at the end...
|
|
|
4841218 |
Electronic controller and a system and method for optimizing generation of electrical power utilizing the same
In a system comprising an asynchronous generator rotatable at variable speeds, and a main electrical network carrying power at a substantially constant voltage and frequency, the improvement...
|
|
|
4805084 |
Direct DC to RF conversion by impulse excitation
A device for converting DC to RF has a monolithic PIN diode adapted to be coupled to a DC supply. The diode receives light switching pulses and is coupled to a monolithic resonator. The monolithic...
|
|
|
4772994 |
Power source using high-frequency phase control
A power source using high-frequency phase control possessing an ability to cause the transfer of electric power between a power source side and a load side to be made through a high-frequency...
|
|
|
4744017 |
High tension power supply with means for preventing transformer saturation
A high tension power supply for use in an x-ray tube drive circuit which uses a step-up transformer to raise an input line signal to the desired voltage level. A partially open bridge or other...
|
|
|
4706178 |
Power conversion system
A power conversion system includes an inverter for transforming d.c. power into high-frequency a.c. power, a high-frequency transformer for changing the voltage and isolating the input and output...
|
|
|
4695931 |
Voltage/frequency converter with frequency drift compensation loop
A voltage/frequency converter is formed of a V/F converter circuit which converts an input potential into a frequency corresponding to the instantaneous value of the input potential, and a...
|
|
|
4598349 |
Electronic transformer composed of flyback converters
An electronic transformer comprising first and second switching converters for converting the positive and negative half periods, respectively, of an input alternating voltage into high frequency...
|
|
|
4556937 |
DC-AC Power converter including two high frequency resonant link converters
A DC to low frequency AC power conversion system includes two high frequency link inverters and a cycloconverter. DC input is fed to the high frequency links in parallel, and the outputs of the...
|
|
|
4479175 |
Phase modulated switchmode power amplifier and waveform generator
A phase modulated DC-to-AC or a DC-to-DC power converter utilizes input terminals connected to a source of power and output terminals connected to a suitable load. The transfer of power between the...
|
|
|
4453205 |
DC/AC Converter with shunt regulated load
A circuit including a dc/ac converter for supplying an ac consumer with an alternating voltage, such as a sinusoidal voltage, from a dc voltage source has an auxiliary load circuit which is...
|
|
|
4255782 |
Electrical energy conversion systems
Electrical circuits, apparatus and methods for a variety of applications. A switching device subdivides an alternating current input signal into a plurality of lower voltage pulses by switching on...
|
|
|
4244015 |
Pulse width modulated inverter
Apparatus for chopping DC power at a high frequency, for example 20 kHz, such high frequency being pulse-width modulated by a lower power frequency source at the desired power frequency. The pulse...
|
|
|
4222095 |
Frequency to voltage converter
A circuit is disclosed which is responsive to an applied alternating input signal for producing an analog output signal the magnitude of which is made proportional to the frequency of the input...
|
|
|
4214299 |
Frequency-voltage converter
A first pulse train has repetition pulses in proportion to the frequency of an input signal. A second pulse train has repetition pulses obtained by shifting the timing phase of the pulses of the...
|
|
|
4128768 |
Ozone generating apparatus
An ozone generating apparatus is disclosed which comprises a power source device for feeding a rectangular waveform alternating current between the discharge electrodes of a discharge tube of an...
|
|
|
4115677 |
Induction heating apparatus
An induction heating apparatus includes an inverter circuit, a plurality of output coils for induction heating, a coil selection circuit for selectively connecting the output coils to the output...
|
|
|
3992660 |
Frequency-current conversion circuit
A frequency-current conversion circuit adapted to a speedometer installed in a vehicle for converting the rate of rotation of an engine to a current signal wherein a first capacitor is charged to a...
|
|
|
3824448 |
CONTACT POTENTIAL GENERATOR SYSTEM
A contact potential generator comprising a ferro-electric generator excited into operation and maintained at that state to produce a useful output signal by the power input of an ignition section...
|
|
|
3794906 |
ELECTRICAL CONVERTER
A full wave inverter circuit having a DC input voltage and an AC output voltage of controlled fundamental frequency. Constant amplitude voltage pulses are applied to a center tapped primary winding...
|
|
|
3742336 |
VERSATILE CYCLOINVERTER POWER CONVERTER CIRCUITS
A family of high-frequency-link solid state power converters having an input and output switching circuit that function as a high frequency parallel capacitor commutated control inverter and a...
|