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5453643 |
Controllable compound voltage DC/AC transforming circuit
In a controllable compound voltage high-efficiency DC/AC transforming circuit, including a plurality of identical battery units which are arranged in parallel and/or serial arrangement to provide a...
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5452197 |
Static DC to AC power converter including separate high and low power converters
Disclosed is a DC-to-AC power converter (10) that includes a high power DC-to-AC converter (20) and a low power DC-to-AC converter (40). The low power DC-to-AC converter produces a continuous...
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5450306 |
Closed loop pulse width modulator inverter with volt-seconds feedback control
A closed loop pulse width modulator (PWM) inverter corrects for variations and distortion in the output AC voltage waveform caused by non-linearities of the switching devices or changes in the DC...
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5448467 |
Electrical power converter circuit
The invention relates to a series-resonant converter circuit, which includes a capacitive energy storage network coupled to an inductive energy storage network for supplying a load. A current...
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5444608 |
High frequency power distribution system
Novel high frequency power distribution systems are disclosed. The system of the present invention uses a relatively high frequency AC (e.g. 100 kHz or higher) and distributes it by a high...
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5442540 |
Soft-switching PWM converters
A full-bridge zero-voltage-switching pulse-width-modulated converter employs a saturable reactor in place of the linear inductor in order to reduce current stress on the active switches, reduce...
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5438498 |
Series resonant converter having a resonant snubber
A fixed frequency, series resonant converter having a resonant snubber comprising an inductor and capacitor connected across a tank circuit of the converter. An optimum amount of inductance in the...
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5438497 |
Tertiary side resonant DC/DC converter
Resonant DC/DC converters are disclosed. The DC/DC converters according to the present invention include a bridged inverter, a resonant circuit, a high frequency transformer and a rectifying...
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5436819 |
Apparatus for and method of compensating for an output voltage error in an inverter output
The present invention provides an apparatus for and a method of compensating an output voltage error of an inverter that changes direct current (DC) power into alternating current (AC) power. More...
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5436825 |
Electronic control circuit for the supply of ohmic-inductive loads by means of direct-current pulses
An electric control circuit for the supply of ohmic-inductive loads via direct-current pulses with changeable pulse use-ration encompasses a regulator featuring a transformer (T) wherein the...
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5432695 |
Zero-voltage-switched, three-phase PWM rectifier inverter circuit
A novel switching rectifier circuit that combines the conventional three-phase, 6-stepped PWM rectifier/inverter circuit with a simple, low-power switch commutation circuit to provide zero-voltage...
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5432694 |
Method of regulating a voltage inverter operating in quasi-resonance
Method of regulating a voltage inverter operating in quasi-resonance, including an inverter bridge with controlled components (transistors, GTO etc.) operating in turned off-saturated mode, and an...
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5430632 |
Self-oscillating DC to DC converter
A self oscillating power converter utilizing a pair of MOSFET transistor switches in a half bridge configuration wherein the junction of the two transistors is coupled to a reactive network which...
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5430638 |
Low noise type converter with complementary transistors
A low noise type converter comprising an input transformer having first and second terminals for inputting a repetitive waveform signal. First and second series circuits are provided, each having...
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5428267 |
Regulated DC power supply
The invention relates to a DC power supply utilizing DC to AC to DC conversion with pulse to pulse current mode IC controlled PWM modulation at an above-sonic repetition rate (e.g., 30 Khz) in a...
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5422765 |
Inverter device attenuating in-phase harmonic components of an oscillating output signal
An inverter device receives a D.C. power source as an input and performs a switching operation at a single frequency in response to a preset driving signal (Vg1, Vg2, Vg3, Vg4) to produce an A.C....
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5420781 |
High voltage sensing circuit for an X-ray tube power supply
A system senses a voltage that exists across two nodes using first and second resistors connected in series between the two nodes. A differential amplifier acts as a detector and produces a first...
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5418707 |
High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs
A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing...
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5416692 |
AC power supplying unit with self monitoring of AC out and detection of leakage
An invertor-controlled power unit includes an invertor circuit which performs switching control of direct current output from a direct current power source circuit in response to a driving signal....
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5414609 |
DC to DC/DC to AC power conversion system
A pulse width modulation DC to DC converter operates in an open loop mode to convert the DC output of the AC to DC converter to a desired, predetermined DC level using pulse width modulation...
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5414616 |
Inverter with reduced wiring inductance and increased current balance between semiconductor switching elements
In an inverter device, two short-circuiting bars of a direct current circuit portion are each formed of a conducting plate bent so as to have a crank-shaped cross section, one of the outside flat...
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5412557 |
Unipolar series resonant converter
A high efficiency static series resonant converter and method for converting power between two electric AC and/or DC circuits includes a resonant tank coupled to a link current synthesizer for...
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5410466 |
High power-factor inverter device having reduced output ripple
An inverter device includes an input power-factor improving circuit which causes part of a high frequency output of an inverter circuit to feedback, through an impedance element forming at least...
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5410464 |
Voltage-type self-commutated conversion system with voltage control
A voltage-type self-commutated conversion system including a voltage-type self-commutated power converter with a plurality of anti-parallel circuits of a self-turn-off device and a diode. DC...
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5408403 |
Power supply circuit with power factor correction
A power supply circuit for powering a load with bi-directional current comprises means for supplying d.c. power from an a.c. voltage, a series half-bridge converter, and a boost converter. The...
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5400235 |
High frequency energy saving DC to DC power converter
A DC to DC power converter circuit has a current fed inverter with a series connected first diode and a capacitor connected in parallel with the legs of the inverter. The diode is poled to provide...
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5400241 |
High frequency discharge lamp
The invention relates to a circuit arrangement suitable for high-frequency operation of a discharge lamp, provided with input terminals (1, 2) for connection to a low-frequency supply voltage...
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5381330 |
Half-bridge arrangement for switching electrical power
A half-bridge arrangement for switching electrical powers, wherein at least two semiconductor switches (14, 21; 15, 20; 16, 19; 17, 18) forming a half-bridge (12a; 12b; 12c; 12d) are connected in...
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5379209 |
Electronic switching circuit
A pulse-width modulated (PWM) circuit provides current through a load by opening and closing main electronic switches which connect the load to a power supply. Each main electronic switch connects...
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5377094 |
Push-pull output stage for driving motors which generates auxiliary voltage supply
A push-pull output stage for driving a motor which provides an auxiliary power supply Vaux above supply voltage Vcc by using highside MOSFETs which do not have source-body shorts, and by connecting...
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5375054 |
Converter bridge having two half-bridges connected by bus bars
A converter bridge includes at least two half bridges, which are connected together by bus bars. The bus bars include at least two directly opposite bus bar segments and are arranged mirror...
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5373436 |
Power converting device with inverter circuitry for driving multiple-phase variable-speed motor
A power conversion device of the inverter type for three-phase DC motor includes three parallel pairs of output transistors between a power supply voltage and the ground potential. These pairs...
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5371668 |
Resonant inverter
A resonant inverter has transistor switches (20, 30) arranged to conduct current from a d.c. source (10) alternately in one direction and the other through an inductor (40) and capacitor (42). The...
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5371666 |
Average current mode control apparatus for an AC output amplifier
A current mode control apparatus generates an AC power output from a DC input source. The apparatus includes a pulse width modulator (PWM) to produce gate drive signals for driving a power output...
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5369563 |
Fast turn-off circuit for use with an AC bridge circuit
A power output driver circuit that converts a DC voltage into an AC voltage includes a gate driver circuit for turning on electronic switching devices. The gate driver circuit allows for a rapid...
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5367448 |
Three phase AC to DC power converter
A three phase AC to DC converter has an AC driven regulated current source, and it is provided with an unregulated current controller inverter. The zero crossing of the AC voltage input is...
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5365424 |
High power laminated bus assembly for an electrical switching converter
A low impedance, low noise laminated bus assembly for a high power switched converter that has a plurality of switch pairs including a -DC switch and a +DC switch for high speed switching to...
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5361196 |
Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage
An apparatus for a three-level DC/AC converter, in which the width of output pulse having the same polarity as the fundamental wave of the converter output phase voltage is adjusted depending upon...
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5359274 |
Active offset for power factor controller
A switch mode power supply for a ballast having a power factor controller and providing a regulated D.C. output voltage. The controller is responsive to a control input signal which includes a...
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5355297 |
Three-level three-phase inverter apparatus
A three-level three-phase inverter apparatus operating on a proposed pulse width modulation method whereby good output voltages are obtained free of the effects of the minimum pulse width...
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5355293 |
Low-voltage DC power supply
A low-voltage DC power supply, e.g. 5 V output, is fed from a higher-voltage input DC source, e.g. 300 V. A plurality of switched transformers each comprise a primary winding (L1) for switchably...
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5351182 |
Level shift circuit and inverter apparatus using the same
An inverter apparatus includes a flip-flop circuit and a voltage clamp circuit disposed in the upper arm, and set and reset signal generators each having a series connection of two switching...
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5347444 |
Output circuit of PWM inverter
An inexpensive output circuit of a PWM inverter for PWM controlling a coil voltage of a motor with small control error of voltage at a motor winding terminal and low power consumption includes an N...
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5343377 |
Method of controlling switching regulator
A method of controlling a current resonant parallel type switching regulator comprises providing a current circulating circuit for preventing a circuit loss increasing phenomenon from occurring due...
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5343382 |
Adaptive current control
Closed-loop control of current through a load through pulse-width modulated application of a substantially constant supply voltage across the load, wherein a duty cycle turn-on time is adjusted...
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5341286 |
Current detecting method
A current detecting method in a case of effecting the digital current control of a motor by a PWM switching system, wherein the current feedback control time and the PWM period are synchronized,...
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5336978 |
Drive circuit for electroluminescent lamps
A drive circuit for an electroluminescent lamp and a novel lamp are disclosed. The drive circuit generates an alternating output voltage which is variable in magnitude and frequency and which may...
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5327335 |
Harmonic feedback control for an inverter
Harmonics in the AC output power of an inverter are sensed and are compared to corresponding references to produce a plurality of errors. These errors are used to produce a harmonic waveform which...
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5325283 |
Novel zero-voltage-switching family of isolated converters
An isolated zero-voltage-switching converter in which the magnetizing inductance of the isolating transformer is a resonant element and an open circuit is provided on the secondary side of the...
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5323305 |
Light emitting power supply circuit
A series coupled component partially includes a) a load circuit including an inductor and an EL or EL array having capacitive load characteristic, b) a load circuit including an inductor, a bipolar...
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