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7535124 |
Voltage stabilizer
The voltage stabilizer for stabilizing a voltage of a circuit includes a first resistor, a second resistor, a voltage controller, and a current supply unit. The voltage controller keeps a voltage...
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7518895 |
High-efficiency power converter system
In one embodiment, a power converter system includes a first input terminal and a second input terminal operable to connect to an alternating current (AC) power source, and an output terminal at...
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7495940 |
Method and device for producing rectifier gating signals using a peak detector
A device that includes an active rectifier ( 14 ) having control gates controllable to produce an output voltage on a DC bus ( 20 ), a gate control circuit ( 16 ) for producing gate control signals...
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7173834 |
Half-controlled silicon-controlled rectifying system and method thereof
A half-controlled silicon control rectifying system and method thereof are provided. In this case, the first detection unit detects the zero cross phase of the triphase AC in input port thereof....
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6934169 |
Method of controlling half-controlled rectifier, and rectifier structure
A method of controlling a half-controlled rectifier, and a rectifier structure, which comprises an n-phased half-controlled converter bridge, a DC intermediate circuit and a capacitor of the DC...
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6577072 |
Power supply and LED lamp device
An LED lamp device of the invention includes a power supply unit ( 102, 103 ) supplied with an alternating-current power supply voltage, and an LED lamp ( 106 ) constituted by one or a plurality of...
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6532160 |
Switching power supply
A switching power supply comprises a transformer 3, a switching circuit 1, an output rectifier circuit, an output smoothing circuit, and a snubber circuit. A snubber capacitor 17 has one...
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6493245 |
Inrush current control for AC to DC converters
The present invention provides for an apparatus and corresponding method for controlling inrush current in an AC-DC power converter by controlling the state of a plurality of silicon-controlled...
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6301139 |
Self-driven synchronous rectifier circuit for non-optimal reset secondary voltage
A power converter has a self-driven synchronous rectification circuit that can operate efficiently with a non-optimal reset secondary voltage waveform that remains at a zero voltage level during a...
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6108224 |
Phase shift triggering circuit for thyristor and an integrated module of the triggering circuit and the thyristor
A phase-shift thyristor trigger circuit, including a synchronous signal sampling circuit, a waveform shaping, integrating and comparator circuit, a high-frequency modulating pulse distributor...
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5995395 |
Control of a composite bridge at zero voltage
The present invention relates to a device for controlling a composite bridge including two anode-gate thyristors, the cathodes of which are connected together to a positive output terminal, the...
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5519600 |
Three-phase self-balancing power supply
In a delta-connected power supply system, phase switching circuits are employed and are activated during the failure of one of N+1 converter units. This activation is employed even though there has...
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5483435 |
Power generation system having induction generator and controlled bridge rectifier
A power generation system is constituted by an induction generator and a converter. An output current waveform of the induction generator is determined by the magnetic flux, speed, winding...
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5260863 |
Control of a discontinuous current by a thyristor rectifier with inductive load
For controlling the current in an inductive load, the gate current used to fire thyristors in a rectifier is controlled to reach zero at exactly the same time, within a given half-wave, as the...
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4811189 |
AC rectifier circuit with means for limiting the rectified voltage
The invention relates to an AC voltage supplied rectifier circuit with a downstream smoothing capacitor. A prior art problem with this type of circuit was that the inductive impedance of the supply...
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4780802 |
Control circuit for removing ripple of direct current supply system for voltage source inverter
The present invention relates to a power source apparatus for supplying a stabilized D.C. output to an inverter. In a D.C. power source apparatus for an inverter comprising a forward power...
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4729082 |
Control device for power converter
The invention relates to the control of a power converter in which the AC side is connected through a reactor to an AC power supply while the DC side is connected to a smoothing capacitor and a...
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4725939 |
System for supply of direct current to at least two electrical loads with a common polarity, in particular for multiple electric arcs
A system for supply of direct current to at least two electrical loads having a common polarity, especially for power supply to an arc furnace with several electrodes or to plasma generators,...
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4641234 |
A-C or D-C to D-C converter for dual current locomotives with D-C motors
The present invention relates to supplying a load either from a direct-current source or from an alternating-current source. The power unit, according to the invention, is characterized in that it...
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4636932 |
dv/dt Protection circuit device for an AC-DC converter apparatus
A dv/dt protection circuit device for an AC-DC converter apparatus including control board switching arrangement having a current cut-off function which conducts an interrupts current from a power...
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4618921 |
Power supply system and a starting method thereof
A power supply system for supplying a load current to a load including a serially connected circuit of a controlled rectifier, a switch and a capacitor. A diode is connected in parallel with the...
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4589051 |
Second breakdown protection circuit for X-ray generator inverter
In an X-ray generator operating with a pulse-width-modulated transistor inverter, circuitry is provided to sense the collector-emitter voltage of each of the transistors and to responsively turn...
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4468724 |
Method and apparatus for controlling load current
A load DC motor is supplied with a DC current through a converter principally consisting of thyristors controlled by an ON-state control signal. The load current is detected both as to the mean...
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4467408 |
Means for controlling a forced commutated ac-to-dc electric rectifying circuit to avoid commutation failure
A phase-controlled ac-to-dc rectifying circuit includes a pair of alternately conducting main controllable electric valves and cyclically operative forced commutation means for turning off the main...
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4450516 |
Device for controlling the regulating facilities in an electric high-power AC-DC converter
The invention relates to a device particularly adapted for use with the power supply of a computer for controlling the regulating facilities in an electric high-power AC-DC converter of the power...
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4450385 |
Inductive ballasting of direct current gas discharges
A ballast circuit for direct current gaseous electrical discharge devices includes a rectifying bridge, and an inductive ballast for storing excess energy. The rectifying bridge uses a pair of...
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4376968 |
Protection system for immunizing an inverter system against A-C line voltage disturbances
When a-c power line voltage is rectified by a phase-controlled SCR rectifier bridge to develop an adjustable d-c bus voltage which is then converted by an inverter back to a-c for driving a load,...
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4315305 |
Controlled D-C power supply
By controlling the phase angle at which conduction occurs in the SCR's in an SCR rectifier bridge, a d-c voltage of adjustable magnitude may be produced from a-c line voltage applied to the bridge....
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4233558 |
Regulated dual DC power supply
A dual section power supply, one section for supplying high voltage dc po and the other section for supplying low voltage dc power, are each connected to a common ac source. The high voltage...
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4204148 |
Regulation circuit
A regulation circuit for providing timing gate signals to the dc power section of a power supply, the regulation circuit utilizing phase angle conduction of a programmable unijunction transistor....
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4164016 |
Current sensing system
A circuit for sensing the current applied to a load in power supplies, inverters, and other power conversion equipment and similar systems wherein the voltage between the center tap of the...
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4161022 |
Controllable rectifier circuit for a power supply
A controllable rectifier circuit which may be used in a power supply selectively produces a half-wave or a full-wave rectified signal. The rectifier circuit includes a pair of input terminals for...
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4144559 |
Power converter control system
A power converter control system for use with a power converter of the type which comprises a plurality of cascade-connected converter units of which at least one converter unit is subjected to...
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4122514 |
Direct current power supply
A direct current voltage power supply in which spaced pulses of current are made to flow through the primary winding of a power transformer. The anode-cathode path of an SCR device is connected...
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4118769 |
Full wave demand controlled preregulating supply
A circuit comprising first and second rectifiers for supplying rectified current or voltage to a storage capacitor located at the output of the circuit. The circuit includes a control circuit...
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4090234 |
Input tap changer
A noise free circuit for a transformer secondary having SCR taps which are rendered selectively conducting thereby varying the effective turns ratio of the transformer and providing an...
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4074345 |
Electronic power supply
An electronic power supply utilizes a full wave bridge rectifier circuit whose alternating current voltage source is derived from a multi-primary and multi-secondary winding transformer whose...
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3914575 |
Power supplying device for the operation of a gas discharge container
A power supplying device for the operation of a gas discharge container for the treatment of metallic workpieces. For the provision and the adjustment of the operating voltage the power supplying...
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3883793 |
Power supply system for electrolytic grinding apparatus
A power supply system for use in an electrolytic grinding apparatus comprising a rectifying circuit, a phase number reducing circuit connected to the rectifying circuit for converting an a.c....
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3813594 |
MAGNETICALLY CONTROLLED POWER SUPPLY HAVING PULSATING OUTPUT CURRENT CONTROL
A magnetically controlled arc working power supply having a current control circuit with means for automatically pulsing the control current to produce a pulsating DC output current at an...
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3805143 |
CAPACITOR-DISCHARGE STUD WELDING APPARATUS
In the apparatus disclosed, a direct current source charges several banks of capacitors. A discharge circuit connects the capacitor banks to the same welding terminals. Charge-circuit decoupling...
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3781646 |
CURRENT SUPPLY COMPRISING AN ASYMMETRIC RECTIFIER ARRANGEMENT
Full-wave rectified current supply comprising a single thyristor the gate electrode of which is connected to an electronic control circuit, which supply is connected to a direct-current motor....
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3781640 |
ARC WORKING POWER SUPPLY WITH SATURABLE REACTOR CURRENT CONTROL
An arc working power supply wherein current is controlled by means of a saturable reactor and control circuit which monitors the current to the saturable reactor control winding comparing it to a...
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3735239 |
LINE VOLTAGE REGULATOR UTILIZING LINE VOLTAGE RESPONSIVE TIMING CIRCUIT TO MODULATE DUTY CYCLE OF CONTROLLABLE RECTIFIER
An AC to DC converter regulates its output voltage with respect to line voltage changes by utilizing a line voltage responsive gating signal to control silicon controlled rectifiers in the output...
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3681678 |
CONTROLLED POWER SUPPLY WITH TWO THYRISTORS
A regulated d.c. power supply using two thyristors and a high leakage reactance transformer.
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3675111 |
AUTOMATIC DC VOLTAGE REGULATING SYSTEM
An automatic DC voltage regulating system includes an automatic AC voltage regulator whose output impedance is inductive. Voltages respectively in phase with the voltages of an input and an output...
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3670226 |
DEVICE FOR THE CONTROLLED ACTUATION OF THE BASKET OF A WASHING MACHINE
A speed governing device for washing machines for overcoming the defect of generating radiofrequency noises without using any filter. In addition, the device exploits the advantages of DC motors in...
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3573604 |
RMS AC VOLTAGE REGULATOR
An RMS voltage regulator is realized in a minimal hardware circuitry by employing a unijunction switch to fire a silicon controlled rectifier element, the latter serving to convert a half-wave...
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3562625 |
APPARATUS FOR CONTROLLING THE MEAN VALUE OF CURRENT SUPPLIED BY AN ALTERNATING CURRENT SOURCE TO AN ELECTRIC APPARATUS
Device for regulating the mean value of current supplied by an AC current source to an electrical apparatus, dependent on data supplied by a computer, comprising a cycle counter having N binary...
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3562621 |
INRUSH CURRENT LIMITING CIRCUIT FOR RECTIFIER CIRCUITS WITH CAPACITIVE LOAD
A rectifier circuit with capacitive load in which means are provided for preventing inrush current on start-up, this being accomplished by controlling the firing time of a controlled rectifier in...
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