|
Match
|
Document |
Document Title |
|
|
4799139 |
Voltage regulation for three-phase inverters
A method of and apparatus for regulating the control voltage of a three-phase inverter supplying an a.c. motor are provided, the inverter having a power stage implemented with semiconductor...
|
|
|
4797803 |
Switching power supply VCO
An inventive oscillator, inter alia, is disclosed which can be used to generate a frequency modulated control signal or a pulsewidth modulated control signal for application to a switching means in...
|
|
|
4794272 |
Power regulator utilizing only battery current monitoring
For a power system having a single maximum power point and varying loads, the present invention provides a power regulator which adjusts the operating point of one source as a function of only the...
|
|
|
4794508 |
PWM control circuit for a non-symmetrical switching power supply
A control circuit is disclosed which provides a pulsewidth modulated, quasi-squarewave control signal to a switching transistor in a non-symmetrical switching power supply. A primary winding of a...
|
|
|
4792885 |
Control device of the transistor bases of an inverter arm
An inverter arm is made up of two transistors electrically connected in series, each transistor having its own independent control unit. The control units are supplied by a common power supply unit...
|
|
|
4791546 |
Voltage regulator circuit
An inventive voltage regulator is herein described to provide voltage regulation while maintaining electrical isolation between the input and output sections of a power supply. In a switching...
|
|
|
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...
|
|
|
4766327 |
Circuit and method for synchronizing power sources in a parallel AC electrical power system
Power sources of a parallel AC electrical power system are synchronized by producing a voltage difference signal representative of the difference in output voltages of the power sources and...
|
|
|
4733341 |
Plural inverter synchronizer and control apparatus
An inverter control apparatus contains digital phase-locked loop oscillators, in order to achieve a synchronization with a reference frequency of a commercial power supply. The inverters are...
|
|
|
4723201 |
Control apparatus for pulse width modulation inverters
In a PWM inverter, a first three pulse mode, in which three voltage pulses exist within 120° in the electric angle of the inverter output voltage, is changed over to a single pulse mode, in which...
|
|
|
4721841 |
Control device for resistance welding power supply
A control device having a single static converter incorporating a rectifier and stabilizer block and a transistorized inversion block, the output signal of which is controlled by an amplitude and...
|
|
|
4692855 |
Constant voltage and frequency type PWM inverter with minimum output distortion
Imprementation is presented with a view to eliminating waveform distortion in an ac power supply device using a voltage type inverter. To realize this, there is provided a control system to detect...
|
|
|
4674003 |
Electronic high-voltage generator for electrostatic sprayer devices
A high-voltage generator for electrostatic sprayer devices includes a frequency-clocked power amplifier for feeding the primary of a transformer whose secondary is connected to a high-voltage...
|
|
|
4670702 |
Controller for fuel cell power system
A controller for a fuel cell power system comprises a main switching element inserted between a fuel cell power unit and a dc-ac converter, a secondary battery connected to a charging switching...
|
|
|
4667283 |
Power converter apparatus including a chopper regulated inverter system
A power converter apparatus for use in supplying power from a DC power source to a load, including a chopper connected to the DC power source; an inverter connected to a DC output of the chopper...
|
|
|
4661896 |
High voltage power supply system including inverter controller
A high voltage power supply system includes a DC-to-DC converter for producing a DC low voltage, a DC-to-AC inverter connected to a step-up transformer for producing an AC high voltage by...
|
|
|
4649334 |
Method of and system for controlling a photovoltaic power system
In a method of and a system for controlling a photovoltaic power system including a solar battery and a power converter receiving the output of the solar battery, the voltage of the solar battery...
|
|
|
4644458 |
Electric power supply circuit capable of reducing a loss of electric power
In an electric power supply circuit comprising a plurality of constant current units each of which is controllable by a control voltage (V c ) to keep a circuit output current (I OUT )...
|
|
|
4642748 |
Monitoring switch mode converter performance utilizing duty cycle
A method and circuitry are disclosed for monitoring the performance of a switching system such as a switch mode converter by monitoring the duty cycle of the system. With respect to a switch mode...
|
|
|
4636927 |
DC to AC converter
A DC to AC converter has a linear output amplifier for simplification and for reducing distortion and output noise. A DC to DC converter or converters provides outputs regulated to have small...
|
|
|
4607321 |
Inverter
An inverter for use with a vehicular induction motor employs a modulation system in which the waveform of the carrier wave is adjusted so that the modulation wave is made into a constant DC signal.
|
|
|
4600823 |
Induction heating apparatus having adjustable heat output
An induction heating apparatus comprises a high frequency generation circuit (1) having a heating coil (3), a frequency controlling circuit (10), a duty-cycle controlling circuit (29) and an output...
|
|
|
4527226 |
Inverter control system for providing an easily filtered output
An inverter control system for selecting an angle set defining an inverter output waveform in response to various operating conditions of the inverter. The inverter control system selects an angle...
|
|
|
4521672 |
Electronic welding apparatus
An electronic welding apparatus which, for controlling at least one welding parameter, such as welding voltage or welding current, comprises a switching mode power supply as a control element and...
|
|
|
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...
|
|
|
4375662 |
Method of and apparatus for enabling output power of solar panel to be maximized
The d.c. power supplied by a photovoltaic solar panel to a load is controlled by monitoring the slope of the panel voltage vs. current characteristic and adjusting the current supplied by the panel...
|
|
|
4350891 |
Low ripple regulated X-ray tube power supply
A low ripple high voltage power supply is disclosed for use in a dental X-ray system, utilizing a rectifier and regulator circuit to provide a low voltage regulated DC signal, a DC-AC converter for...
|
|
|
4342075 |
Switched mode DC to DC converter using variable leakage transformer
A variable leakage transformer or a variable voltage transformer comprising a magnetic core with a main magnetic path and a sub-magnetic path, the main magnetic path having at least a common...
|
|
|
4328458 |
Variable leakage transformer and control circuit therefore
A variable leakage transformer having a closed main magnetic path and a closed submagnetic path having a leg common with said main magnetic path. A primary winding is wound on said common leg, and...
|
|
|
4287556 |
Capacitive current limiting inverter
A trapezoidal reference voltage waveform is provided to a PWM inverter for synthesizing an inverter output voltage waveform having substantially the same shape as the reference for effecting...
|
|
|
4287557 |
Inverter with improved regulation
A feedback loop is provided within an inverter feedback control system for modifying reference voltage to effect modifying output voltage from the inverter circuit thereby to maintain constant...
|
|
|
4253139 |
Power conversion and regulation system
A DC or AC power conversion and regulation system in which DC or rectified AC is applied to a voltage controlled oscillator (VCO). The output of the VCO is applied to a frequency sensitive filter...
|
|
|
4251736 |
Method for controlling power flow between an electrochemical cell and a power grid
A method for controlling a force-commutated inverter coupled between an electrochemical cell and a power grid for adjusting the magnitude and direction of the electrical energy flowing...
|
|
|
4251735 |
Dual speed control circuit for power flow through an inverter
A control circuit for a force-commutated inverter connected intermediate a regenerative DC power source and a power grid, the power source/inverter combination operative to supply AC electrical...
|
|
|
4246633 |
Voltage control circuitry for UPS
A voltage control circuit for an uninterruptible power supply (UPS), said UPS involving a controlled rectifier operating from an input AC line to charge batteries and to hold them at a constant...
|
|
|
4236197 |
Voltage regulation loop for inverter power supply
A voltage regulation loop for the rejection of line frequency ripple of 0-180 Hz in an inverter power supply is disclosed. The loop includes an error amplifier (E), a pulse-width modulator (P), an...
|
|
|
4149233 |
Circuit for automatic load sharing in parallel converter modules
A nondissipative circuit for automatic load sharing in parallel converter modules having push-pull power transistors, each transistor having a separate current-sensing transformer and an...
|
|
|
4112287 |
Central oscillator for induction range using triac burner controls
An apparatus for inductively heating cooking utensils comprising four induction cooking coils excited by a central power oscillator providing an alternating sinusoidal excitation voltage at about...
|
|
|
4071884 |
Integrated circuit high voltage DC converter
A step-up DC converter suitable for construction as an integrated circuit chip provides a separate rectangular wave oscillator using a silicon transistor and a power amplifier driven thereby which...
|
|
|
4013859 |
Induction cooking unit having cooking load sensing device and essentially zero stand-by power loss
An induction heating unit is provided having an essentially zero stand-by power requirement and comprised by a high power solid-state inverter for supplying relatively high frequency excitation...
|
|
|
4008427 |
Variable input power supply
An electronic power supply using pulse width modulated (PWM) voltage reguion provides a regulated output for a wide range of input voltages. Thus, the invention apparatus is very versatile and many...
|
|
|
3886433 |
Converter control system with tapped transformer providing constant no-load secondary voltage
A tapped transformer is inserted between an inverter connected to a DC transmission line and an AC system, the transformer being so controlled as to maintain a constant no-load secondary voltage....
|
|
|
3864620 |
ARRANGEMENT OF PARALLEL STATIC AC POWER SOURCES PROPORTIONS
In order to permit static AC power sources connected in parallel to a load to consistently provide a desired porportion of a load current, the amplitude and phase (or frequency) of the voltages...
|
|
|
3825816 |
DC-TO-AC AND AC-TO-DC CONVERTER SYSTEMS
A signal conversion system wherein variable amplitude, direct current or voltage signals from instrument sensors, which represent the magnitude of measured physical variables by amplitude modulated...
|
|
|
3823362 |
COORDINATED MASTER-SLAVE CONVERTER SYSTEM FOR VARIABLE-POWER TANK LOADS
A plural converter system, including parallel-connected current-source inverters, efficiently delivers alternating current to a tank load having variable power requirements. One of these inverters...
|
|
|
3646425 |
DC VOLTAGE MULTIPLIER
A DC voltage multiplier having a plurality of voltage multiplying stages using transistors that are capacitively coupled to an inverter to conduct current in only one direction. A variable...
|
|
|
3500168 |
SELF-DRIVEN INVERTER
|
|
|
3354376 |
Master-slave inverter voltage regulator
|
|
|
3350624 |
Inverter circuits employing load-responsive saturable transformers
|
|
|
3349312 |
Impulse commutated inverter with controllable output voltage
|