Matches 201 - 250 out of 337 < 1 2 3 4 5 6 7 >
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5309344 Dual active clamp, zero voltage switching power converter  
A dual active clamp (DAC) converter comprising two active-clamp, zero-voltage switching (ZVS) converters for converting electrical power from an input source to an output load is described. The two...
5293111 Method for minimizing the switching loss in a power switch  
A switching current converter is connected in parallel with each controlled power switch in an electric circuit so that it is allowed to operate from the input voltage and transfer energy from...
5291382 Pulse width modulated DC/DC converter with reduced ripple current coponent stress and zero voltage switching capability  
An improved DC to DC converter is provided in particular for converters with high power density requirements. The converter comprises an input voltage source and a capacitor connected in series to...
5291385 Zero-current switching forward power converter operating in damped reverse boost mode  
In a zero-current switching forward converter both a unidirectional conducting device and a circuit consisting of a switch in series with a dissipative element are connected across the energy...
5274208 High frequency heating apparatus  
A high frequency heating apparatus includes a frequency conversion section including a switching element and converting a commercial power supply frequency to high frequency waves by an on-off...
5274539 Capacitance-multiplying converters for supplying distributed pulsed loads  
A distributed power system for supplying pulsed loads, such as radar loads, includes a relatively high-voltage, energy-storage capacitor coupled in parallel between an input dc power source and a...
5253157 Half-bridge inverter with capacitive voltage equalizer  
A half-bridge inverter circuit is provided for converting a DC voltage source to an AC voltage waveform, and supplying the AC voltage waveform to a load. The half-bridge inverter includes an...
5235502 Zero current switching forward power conversion apparatus and method with controllable energy transfer  
An improved forward converter switching at zero-current incorporates a mechanism for selectively regulating the amount of forward energy which is delivered to a load during each converter operating...
5202619 Control circuit for a switching transistor  
In a switching transistor control circuit, the switching transistor has a control electrode and first and second main circuit electrodes. A reactor is connected in series with the first main...
5184289 Magnetic control process for transfering energy in a static converter  
The invention relates to a magnetic control process for transfering energy in a static converter comprising a voltage source (E) and an almost sinusoidal current generator IQS serially coupled with...
5173846 Zero voltage switching power converter  
A circuit for utilizing the magnetizing current in the transformer of a converter to reset the transformer's core and to provide a zero-voltage-switching condition on the converter's primary switch...
5168435 Converter  
According to this invention, a converter includes a voltage transformer, a switching transistor, a resistor, a control transistor, and a control circuit. The voltage transformer has a primary...
5144547 Rectifying circuit with FETs  
A rectifying circuit having rectifying elements in the form of FETs (Field Effect Transistors) and applicable to a switching regulator or similar device. The rectifying circuit has a gate...
5140510 Constant frequency power converter  
A constant frequency power converter which includes a system to switch a resonant capacitive or inductive element during the power transfer cycle in a clamped series resonant converter. A feedback...
5138546 Sintered transformer core of MnZn-ferrite and a transformer comprising such a core  
The invention relates to a sintered transformer core of MnZn-ferrite material, the initial permeability of which ranges between 10 and 1000. Said transformer cores preferably have an average...
5111372 DC-DC converter  
A DC-DC convertor includes a transformer having a primary winding adapted to be connected in series with a DC power source and a secondary winding, a rectifier and smoothing circuit, a main...
5107411 Interference free, pulse type transformer  
An electric voltage generator comprises a transformer (1) having a ferromagnetic core (3), a primary winding (5) and a secondary winding (7). The primary winding (5) includes a first primary coil...
5099406 DC-DC converter with surge voltage prevention  
The disclosed power source apparatus includes a direct current (DC) source connected to the primary side of a transformer through a main switching element, a shunt circuit connected in parallel to...
5089947 Power supply circuit featuring minimum parts count  
A full reset flyback regulator includes a power transformer having a primary winding and at least one secondary winding coupled to a load. A single control winding on a primary side of the power...
5072353 Circuit configuration for a blocking oscillator converter switching power supply  
A circuit configuration for a blocking oscillator converter switching power supply includes a switch. A transformer has a primary winding in the circuit of a direct voltage source being connected...
5066900 DC/DC converter switching at zero voltage  
A two switch, DC/DC converter provides sufficient inductive energy storage at the termination of the "on" period of each switch to alter the charge on the intrinsic and stray capacitance of the...
5060128 Flyback power supply  
A flyback power supply for use with a cathode-ray tube includes a flyback transformer which comprises a core having two spaced core legs, and two core units supported respectively on the core legs....
5057986 Zero-voltage resonant transition switching power converter  
A single-ended DC-to-DC power converter which is operative at very high switching frequencies with zero-voltage resonant transition switching. A single magnetic element functions as both a storage...
5043598 High voltage supply having a voltage stabilizer  
A high voltage generating circuit which includes a switching circuit for switching a DC input, a fly-back transformer whose input coil is driven by pulses delivered from the switching actuation of...
5038263 Ripple current reduction circuit  
An improvement is provided for a circuit having a first winding of N 1 turns connected in series with a total inductance of L across a first voltage V 1 and a second steering winding of N 2 ...
5008795 Switched capacitor interleaved forward power converter  
A DC-to-DC power converter topology utilizing parallel connected transformers in a buck switching configuration with each stage operated 180° out-of-phase, with the primary windings of the...
4991075 Low-switching loss DC-DC converter  
A DC-DC converter comprises a switching element having a rise time t on and a fall time t off ; a control device for controlling the switching operation of the switching element; a transformer...
4985820 Driver circuit for switching on lamp with low cold resistance  
A driver circuit for switching on lamps with low cold resistance. The circuit includes a power transistor (T5) of which the collector-emitter path is connected to the lamp (12) in a series circuit...
4959765 DC to DC converter using quasi-resonance  
A quasi-resonant DC to DC converter having zero-current and zero-voltage switching includes a transformer with primary and secondary windings, and periodic switching means connected in series with...
4933830 Switching power supply  
A switching power supply using a step-up transformer whose impedance viewed from its primary side is different from the impedance viewed from its secondary side whereby the inductance of its...
4930059 Switched-mode DC-to-DC power converter  
A switched mode DC/DC power converter for high outputs includes two parallel channels. Each channel consists of a flyback transformer (Fb-Tr1, Fb-Tr2) with a timed primary switch (S1, S2) on the...
4926304 Switched-mode power supply with low loss interrupted oscillation  
A switched-mode power supply circuit for converting a DC input voltage into a DC output voltage comprises a series arrangement of a controllable power switch and an inductive element coupled...
4870554 Active snubber forward converter  
In a forward converter power supply comprising a transformer having a primary winding connected to a primary circuit and a secondary winding connected to a secondary circuit, and a switching...
4866590 Supply having a load invariant auxiliary power supply supplied from a main transformer and a current suppressing inductor  
Disclosed is a switching power source having a series connection composed of a main transformer, a current-suppressing inductance element, and a switching element and connected across a DC input...
4841201 Display device including flyback transformer constructed to control leakage currents  
A stacked or laminated-layer type of flyback transformer includes a plurality of high voltage windings wound in regular order in a direction of the winding axis and arranged on the same core...
4837452 Off-line dc power supply  
A method and apparatus are disclosed for controlling an off-line dc power supply circuit including a printed circuit board. The power supply circuit comprises a source of unregulated dc input power...
4833581 Power supply for a magnetron  
A power supply for a magnetron comprises an inverter circuit for converting a direct voltage obtained from a commercial frequency power source into an alternating voltage of a higher frequency by...
4829414 Circuit for generating a constant high voltage for CRT deflection in response to multi-frequency horizontal sync input signal  
A circuit for generating a constant DC high voltage responsive to an input signal having various frequencies, having a frequency-voltage converter responsive to the input signal to generate a...
4823248 High voltage generator  
High voltage generators are generally arranged to step up flyback pulses from a horizontal deflection circuit by means of a flyback transformer consisting of a primary low voltage coil and a...
4814963 Modular power supply with variable input voltage and output voltage flyback power modules  
There is disclosed herein a modular, high power, flyback transformer based power supply with step up and step down capability. The power supply uses multiple flyback transformers having switching...
4812959 Synchronization circuit for a blocking oscillator  
A non-interfering power supply includes a free-running blocking oscillator power supply subsystem and a circuit arrangement that synchronizes the blocking oscillator power supply subsystem to...
4812960 Power feeding apparatus  
A power feeding apparatus which is used in a high-frequency heater or the like, is further power-converted by a transformer after the power provided by the power supply such as commercial power...
4809149 Single-ended down converter  
A controlled single-ended down converter comprises a transformer of d.c. separation of the input circuit and the output circuit, a switching element controlled in pulse width in the input circuit...
4809148 Full-fluxed, single-ended DC converter  
A full-fluxed, single-ended, DC converter is disclosed. The converter includes a transformer having primary and secondary windings magnetically coupled and wound about a common core. A regulation...
4805079 Switched voltage converter  
A switched voltage converter formed asymmetrically or symmetrically with one (S1) or two controlled semiconductor switches, respectively, connected in a series arrangement, with a first coil (L1)...
4803722 Circuit for remote supply of subscriber line terminals in a telecommunication system  
A circuit for remote supply of subscriber line terminals in telecommunication systems, especially suitable for employment in digital telecommunication systems, is described. The circuit comprises a...
4802080 Power transfer circuit including a sympathetic resonator  
A power transfer circuit includes first and second windings (L1, L2) sharing a common magnetic core (101). Each winding has associated with it a parallel capacitor to thus form a pair of "tank"...
4787020 Full-wave output type forward converter  
Disclosed is a full-wave output type forward converter wherein a main transformer having a primary winding connected in series with a switching element includes two secondary windings as winding...
4783727 DC/DC converter  
A DC/DC converter has a transformer and a switching transistor provided with a discharge circuit and activated by an actuating circuit. The discharge circuit includes a choke in series with two...
4780696 Multifilar transformer apparatus and winding method  
A multifilar transformer apparatus and winding method where first and second windings are bifilar wound around a core for NA turns, the first, second, third, and fourth windings are quadfilar wound...
Matches 201 - 250 out of 337 < 1 2 3 4 5 6 7 >