|
Match
|
Document |
Document Title |
|
|
7596002 |
Power conversion system and method
A power conversion system comprises a converter coupled to a power source and configured to convert a DC power to a variable AC power signal. The power conversion system may further comprise a...
|
|
|
7557547 |
Self exited oscillation converter providing a stable output voltage from a wide range of input voltages
The present invention provides a control power supply capable of stably operating to output a desired voltage as electric power, even when the input voltage thereof varies over a wide range. A...
|
|
|
7515440 |
Method and apparatus for output voltage regulation in primary control switched mode power supplies
A voltage sense circuit and power supply regulation technique. In one aspect, a voltage sense circuit utilized in a power supply regulator includes a transformer including a sense winding and an...
|
|
|
7492612 |
High-voltage generator
A high-voltage generator includes a high-voltage transformer having a primary coil, a secondary coil, and an auxiliary coil, and a PNP bipolar junction transistor. Based on the self-oscillation...
|
|
|
7391627 |
Power converter
A power converter comprises an inductor (LP) and a controllable switch (CF) coupled to the inductor. A switch controller ( 1 ) supplies a periodic switching signal (VC 1 ) which has a repetition...
|
|
|
7375995 |
Power factor correction circuit
A power factor correction circuit used for regulating the phase of a DC current outputted from a rectifier unit in a power supply includes an energy inductor, an output diode, a switch unit, a...
|
|
|
7315130 |
Switching control for inverter startup and shutdown
An electronic ballast circuit for a lamp is described, wherein the ballast comprises a power factor correction circuit coupled to an inverter circuit. The inverter circuit is further coupled to a...
|
|
|
7235956 |
Step up switching converter
A step up switching converter is disclosed. The switching converter comprises a first semiconductor switch arranged in series connection with a storage inductor and a sensor resistor. The control...
|
|
|
7196915 |
Integrated transformer based step-up converter
A step-up converter based on an integrated transformer, comprising a self-resonating oscillator circuit that has inductive elements constituted by primary and secondary windings of at least one...
|
|
|
7173830 |
Device for converting an AC voltage from a main electricity supply to a DC voltage at a predetermined level and waveform
The present invention relates to a device ( 10 ) for converting an AC voltage from the mains electricity supply into a DC voltage of predetermined level (and waveform), comprising:—a rectifier...
|
|
|
7119499 |
Switching power device
A switching power device uses a non-capacitor flyback converter circuit not provided with a smoothing input capacitor having a large capacity. Therefore, a power harmonic can be suppressed and a...
|
|
|
7113412 |
Drive circuit and power supply apparatus
In charging a gate of a NMOS transistor Q 1 , the charging speed is adjustable by varying a resistor R 1 . When an inputted pulse signal VIN reverses to a negative voltage, a diode D 2 turns off....
|
|
|
7106602 |
Switching-bursting method and apparatus for reducing standby power and improving load regulation in a DC—DC converter
A circuit and corresponding method for reducing standby power and improving no-load to full-load regulation for ringing choke converters by maintaining a reduced duty cycle, with longer off time at...
|
|
|
6989997 |
Quasi-resonant DC-DC converters with reduced body diode loss
Buck converters having a resonant inductor Lr, resonant capacitor Cr, and synchronous switch Q 3 that together provide reduced switching loss and soft switching. In operation, the resonant...
|
|
|
6956335 |
Circuit arrangement
A circuit arrangement for operating a lamp including a first circuit and a second circuit. The first circuit generates a second DC voltage from a first DC voltage and includes a transformer. The...
|
|
|
6862196 |
Integrated switch with RF transformer control
The invention concerns a control circuit for controlling a power switch by means of a galvanic insulation transformer, the transformer being produced in the form of planar conductive windings on an...
|
|
|
6781853 |
Method and apparatus for reduction of energy loss due to body diode conduction in synchronous rectifiers
A method and apparatus for preventing current flow through the integral body diode of an electronic switch (e.g. MOSFET) in the secondary circuit of a synchronous rectifier. In a conventional...
|
|
|
6608768 |
Use of a rectified image voltage for controlling the switch on the primary side of a switched-mode power supply
A switched-mode power supply has primary and secondary sides, and a transformer (M 1 ) with a primary winding, a secondary winding and an auxiliary winding. The primary winding and the auxiliary...
|
|
|
6509784 |
Switched mode power supply control
In an integrated circuit (IC) for providing an enabling signal (EN) to a converter, the integrated circuit (IC) includes a monitoring circuit (FET 1 , R 2 , D 1 , Io, M, S 1 ) for providing a...
|
|
|
6404654 |
Self-oscillation type resonant flyback converter utilizing charge stored effect of the P-N diode
A self-oscillation type resonant flyback converter includes a series combination of a primary winding and a switching transistor. A secondary winding is connected to a power diode and to an output...
|
|
|
6288914 |
Switching power source
In order to reduce a power consumption in a standby state of a load of a switching power source by intermittently controlling an oscillation of a switching element of the switching power source...
|
|
|
6078508 |
Self-oscillation type switching power supply apparatus
A self-oscillation type switching power supply apparatus comprises: a transformer T having a primary winding N1, a secondary winding N2, and a feedback winding N B ; a switching transistor Q1 for...
|
|
|
6014321 |
Electronic switched-mode power supply and its use
The invention is directed to an electronic switched-mode power supply for supplying power to an electrical energy-absorbing device from an AC or DC voltage source of different voltage levels, with...
|
|
|
5982651 |
Half-bridge self-exciting switching power supply with over-voltage cut-off capability
In a half-bridge self-exciting switching power supply, an over-voltage detector receives the power supply output and generates an over-voltage signal when the power supply output exceeds a preset...
|
|
|
5874818 |
Method and apparatus for sensing load current in a motor controller
The approach to measuring load current in a multi-phase bridge inverter circuit connected to a multiphase load involves placing a single current sense resistor in series with the inverter circuit...
|
|
|
5864472 |
Apparatus for controlling a multiresonant self-oscillating converter circuit
A direct current to direct current converter utilizes a MOSFET half-bridge configuration in which the inherent magnetizing and leakage inductances of the transformer are used as the only...
|
|
|
5852549 |
Power-supply circuit
In a self-oscillating power-supply circuit for charging a battery, a switching transistor (T2) is turned off if the voltage across a sensing resistor (R3) exceeds the threshold voltage of a zener...
|
|
|
5850335 |
Isolation-type switching power supply
A low-cost and highly reliable flyback isolation-type switching power supply comprises a main transformer and an auxiliary transformer. A secondary winding of the main transformer is connected in...
|
|
|
5838553 |
Voltage stabilized self-oscillating power supply
In a self-oscillating power-supply circuit for charging a battery, the main switching transistor is turned off by a second switching transistor (T2) of an opposite conductivity type, which is...
|
|
|
5780976 |
Constant-voltage automatic charging strobe circuit
This invention is designed to reduce the number of parts in the circuits of a constant-voltage automatic charging strobe circuit, thus reducing the cost. In addition, it allows a user to decide...
|
|
|
5751560 |
Switching power circuit with current resonance for zero current switching
A transformer has a primary winding including a first end which is connected to a first input terminal. A switching transistor is connected between a second end of the primary winding and a second...
|
|
|
5706183 |
Inverter power supply with single discharge path
An inverter power supply having a DC source, a transformer having a primary winding, a secondary winding, and a feedback winding, an L-C resonant circuit of a capacitor and the primary winding, and...
|
|
|
5621622 |
Power converter overload protection circuit
Overload protection for an AC/DC converter is formed by a high frequency AC power signal provided to a step-down/isolator circuit which converts the power signal to a low voltage signal. An output...
|
|
|
5558071 |
Ignition system power converter and controller
A high efficiency high power DC to DC power converter and controller system for a CD ignition system with a simple converter controller (8) for controlling a power switch (2) of a transformer (1)...
|
|
|
5515256 |
Self exciting type switching power supply circuit
In a switching power supply circuit in which a primary winding of a, transformer is connected to a DC voltage source through a switching transistor which is turned on and off at a predetermined...
|
|
|
5420776 |
Blocking-oscillator switched-mode power supply with sinusoidal current consumption
A blocking-oscillator switched-mode power supply for sinusoidal current consumption includes a transformer having a primary winding. A smoothing capacitor is connected to the primary winding. A...
|
|
|
5412555 |
Self-oscillating DC-DC Converter with zero voltage switching
The present invention is an ON/OFF type self-oscillating DC--DC converter with zero voltage switching and is provided with a transformer, a switching element on the primary side and a diode on the...
|
|
|
5390100 |
Freely oscillating switched-mode power supply
A freely oscillating switched-mode power supply includes a transformer having a power winding for providing an output voltage, a drive winding for providing a switching voltage and a regulating...
|
|
|
5383106 |
Regenerative control type switching power source device
Disclosed is a switching power source device for supplying a DC stabilized voltage to industrial or household electronic appliances. The power source device can restrict a change in the switching...
|
|
|
5333104 |
Inverter power source
An inverter power supply includes a DC supply providing a DC voltage from an AC mains, a transformer having primary, secondary, and feedback windings, and a self-excited oscillator energized by the...
|
|
|
5317494 |
Power supply circuit utilizing voltage and current resonance for reducing switching loss
In a power supply circuit, upon turning on of a switching element, a sinusoidal resonance current flows through a series resonance circuit and a smoothing capacitor of a dc output circuit is...
|
|
|
5309343 |
Driver circuit having paralleled transistors and current-variable resistive elements
The present invention is a driving circuit that comprises a magnetically permeable core, a high voltage secondary winding around the core with the secondary winding being connectable to a device to...
|
|
|
5266881 |
Universal high current battery charger
A high current battery charger of the driven blocking oscillator type includes a three-winding transformer. The primary winding is connected in series with the collector-emitter path of a switching...
|
|
|
5225972 |
Power source
A power source driving an electrical device includes a DC power supply providing a rectified and smoothed DC voltage from an AC main power, a self-oscillator energized by the DC power supply to...
|
|
|
5012399 |
Self-oscillation type converter
A self-oscillation type converter comprises a transformer and a switching transistor. The switching transistor is connected in series to a primary winding of the transformer. A start current is...
|
|
|
4887198 |
Electronic large current switch for a single power circuit
An electronic large current switch for a single power circuit has a DC-to-DC converter for low voltage transformation, the operation of which is controlled by a control switch or a periodic...
|
|
|
4722041 |
Switching regulator
An on-on type switching regulator comprises a blocking oscillator, rectifying-smoothing circuit, and a voltage drop circuit. The blocking oscillator includes a transformer having a collector...
|
|
|
4710695 |
Power supply circuit
A transformer employed in a power supply circuit of a ringing choke converter type comprises two feedback windings which share the current to be supplied to the base of a switching transistor for...
|
|
|
4698741 |
High efficiency high voltage power supply for gas discharge devices
A high efficiency, low cost solid state power supply for gas discharge or other devices including a resonant oscillator having a high voltage transistor and a switching circuit connected to the...
|
|
|
4694385 |
Switched-mode power supply with delay network to reduce switching losses
A switched-mode power supply circuit for converting a d.c. input voltage into a d.c. output voltage. The circuit includes a controllable power switch (Tr1) connected in series with the primary...
|