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7619910 |
Interleaved soft switching bridge power converter
An interleaved soft switching bridge power converter comprises switching poles operated in an interleaved manner so as to substantially reduce turn-on switching losses and diode reverse-recovery...
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7616466 |
Three phase inverter with improved loss distribution
An inverter circuit couples a DC voltage source having a primary side and a reference side to an electric motor or other AC machine having multiple electrical phases. An inverter circuit includes...
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7616467 |
Circuit apparatus for transformerless conversion of an electric direct voltage into an alternating voltage
In a circuit apparatus for transformerless conversion of an electric direct voltage of a two-pole direct voltage source ( 1 ) connected to ground having a first voltage pole (+) and a second...
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7616462 |
Power supply controller to actively drive a load current when the load current exceeds a set point
A control circuit for a switching power supply reacts to an over current condition in the switching power supply to bring its operating point to a safe condition. The control circuit senses both...
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7609532 |
Phase-shifted PWM bridge with switchable inductors to maintain zero-voltage switching at light load
A dc-to-dc pulse-width-modulated phase-shifted full bridge defines two taps, and the bridge switches are operated to produce alternating voltage between the taps. A switchable inductor is connected...
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7606053 |
DC-to-DC converter and electric motor drive system using the same
A DC-to-DC converter is provided and generally configured for implementation with an electric motor drive system. In at least one embodiment, the DC-to-DC converter includes first and second...
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7602626 |
Power conversion apparatus
In a power conversion apparatus that boosts a solar light voltage, converts it to AC and supplies AC power to a load or system, a second inverter is connected in series to one of two terminals on...
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7599202 |
DC-AC converter with feedback signal control circuit utilizing power supply voltage, controller IC therefor, and electronic apparatus utilizing the DC-AC converter
An inverter controls the power supplied to a load such as a CCFL connected to a secondary winding of a transformer by means of pulse width modulation (PWM) control of the switches of a...
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7599203 |
Power semiconductor device
A power semiconductor device M includes: first and second frames for feeding unipolar power from outside; first and second switching units which are series-connected between the first and second...
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7589986 |
Single stage integrated boost inverter motor drive circuit
An integrated boost inverter circuit including at least one inverter stage having series connected high- and low-side switches having a common node. Each switch having an anti-parallel connected...
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7589987 |
DC-to-DC converter with improved transient response
A DC to DC converter includes a comparator, a driver, and a pair of switches. The comparator compares the output voltage with a reference voltage signal and generates a PWM signal. The driver...
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7589980 |
DC-DC converter
In a DC-DC converter of the present invention, a converting circuit converts a DC-DC voltage outputted from a DC power supply into an AC voltage, and to output to a series circuit in which a...
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7589981 |
DC-AC converter and method of supplying AC power
A dc-ac converter capable of supplying a finely regulated ac drive voltage to a load is provided. For this purpose, the converter includes, in a primary winding of a transformer, a full-bridge or...
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7586768 |
Electric power conversion apparatus for plural DC voltage sources and an AC electrical load
An electric power conversion apparatus includes a power converter connected to at least a first DC voltage source, a second DC voltage source and an AC electric motor. A control unit controls the...
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7586763 |
Electric power converter circuit
An electric power converter circuit includes a rectifying circuit having diodes, a coil, and a full-bridge circuit including switching devices, which are connected in cascade to an AC power supply ...
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7583523 |
Three phase inverter control circuit detecting two phase currents and deducting or adding identical ON periods
A small and highly vibration-proof inverter capable of detecting a phase current without requiring the development of complicated control software and without causing any current distortion is...
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7577008 |
Converter circuit comprising distributed energy stores
The invention relates to a converter circuit comprising at least one phase module ( 100 ) having an upper and a lower converter valve (T 1 , . . . , T 6 ), wherein each converter valve (TI, . . . ,...
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7570502 |
Inverter apparatus comprising switching elements
A problem to be solved by the present invention is to eliminate variation in potential in a turn-off time period of each GTO element, and to stabilize a gate drawing current by surely performing...
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7561453 |
Method for operating an inverter and arrangement for executing the method
There is described a method for operating an electronically controlled inverter. The inverter is controlled during the positive half-wave of the output alternating voltage in such a way that it...
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7558094 |
Control device for power conversion circuit
The control device for controlling a power conversion circuit having voltage-controlled type switching elements includes a control unit generating conduction control signals for controlling...
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7548443 |
Three-phase PWM-signal generating apparatus
An apparatus for generating a three-phase pulse-width-modulation signal for a three-phase voltage inverter employing a semiconductor switching element includes a generating unit that generates the...
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7548439 |
Electric power converter for reducing generated high frequency components
By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat...
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7535740 |
Electronic apparatus and power circuit having reduced switching loss
An electronic apparatus having a load including: a power supply unit supplying a driving voltage to the load; an inverter unit switching the driving voltage; and a control voltage supply unit...
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7529111 |
Drive controller for a self-commutated converter
A drive controller for a self-commutated converter providing a “safe stop” is described. The converter has two half-bridges, and the drive controller includes two control circuits having...
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7525820 |
Inverter
Primary and secondary regions are electrically insulated from each other. The first and second pulse transformers are provided to the respective transistors in the switching circuit. Secondary...
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7522437 |
Inverter circuit and control circuit thereof
An inverter circuit and a control circuit thereof for converting DC power from the renewable energy or distributed energy into AC power so as to be fed into the AC utility power system according to...
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7515439 |
Low voltage stress power converter
A circuit used to convert a DC input to an AC output comprises a pair of series circuits, one or two capacitors, and one transformer. Each of the series circuits is in parallel with the DC input...
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7511447 |
Motor drive apparatus
When a torque command value from an external ECU is within a predetermined variation width, a control unit generates a signal and outputs the signal to a voltage command calculation unit so that...
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7508689 |
Inverter and a drive system using the inverter
A inverter has a switching device for switching DC to change it to AC, and a bipolar type rechargeable battery connected to the switching device in parallel or in series for smoothing the current...
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7505294 |
Tri-level inverter
A tri-level inverter power module has an architecture employing a high degree of modularity that allows a base power module to be quickly, easily, and cost effectively configured to address a large...
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7505293 |
Device and method for controlling electric power converter
The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises DC voltage power supply lines on three levels with...
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7505292 |
Device and method for controlling an electric power converter
The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises DC voltage supply lines, an inverter connected...
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7502243 |
DC/AC inverter with adjustable gate-source voltage
The present invention is a DC/AC inverter for converting a DC supply voltage signal to an AC voltage signal. The DC/AC inverter includes a drive circuit, a switch circuit, a transformer circuit and...
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7495933 |
Resonance transducer
There is provided a resonance transducer including a main bridge linked with an input signal. The resonance transducer includes a transformer assembly across which an output signal can be tapped, a...
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7489527 |
DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same
A DC/DC converter includes an input filter, a half-bridge converter without PWM (Pulse Width Modulation) control function, a synchronous rectifier, an output capacitor, and a DC transformer. The DC...
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7479774 |
High-performance solar photovoltaic (PV) energy conversion system
The present invention focuses on the development of a high-performance solar photovoltaic (PV) energy conversion system. The power circuit of the invention is made of a two-stage circuit,...
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7480155 |
Digital generator of phase shift modulation
A digital generator of phase shift modulation receives two binary coded numbers (F) and (P), that represent a requested frequency value and a requested phase value, respectively, and generates two...
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7471532 |
Electric circuit, in particular for a medium-voltage power converter
Disclosed is an electric circuit, in particular for a medium voltage power converter. The circuit has at least four semiconductor switches which form a series connection and which are connected to...
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7466567 |
Half-bridge CCFL driving apparatus
A half-bridge CCFL driving apparatus uses a bridge rectifier to convert AC into a DC voltage and stores the DC voltage in a capacitor unit. The capacitor unit averages the DC voltage into two...
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7466566 |
DC-AC converter, controller IC therefor, and electronic apparatus utilizing such DC-AC converter
An inverter has a semiconductor switch circuit provided in the primary circuit of a transformer. The switch circuit is controlled by a PWM circuit. The switch circuit is operated on the basis of an...
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7463500 |
Monopolar DC to bipolar DC to AC converter
An electrical DC-to-AC power conversion apparatus is disclosed that is primarily intended for use with solar photovoltaic sources in electric utility grid-interactive applications. The invention...
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7457140 |
Power converter with hysteretic control
According to an embodiment of the present invention, a method is provided for hysteretic control of a DC-to-DC power converter system having first and second switches connected in a half-bridge...
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7450408 |
Integrated converter having three-phase power factor correction
An integrated converter having three-phase power factor correction is provided. The integrated converter includes two PFC circuits. Two DC/DC converters are controlled and switched by the...
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7443698 |
Converter circuit for switching of a multiplicity of switching voltage levels
A converter circuit is disclosed for switching of a multiplicity of switching voltage levels, which have n first switching groups for each phase (R, S, T), with the n-th first switching group being...
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7440301 |
High frequency excitation system
A power module is adapted to be connected to a voltage source and to supply power to a load. The power module includes a switching bridge that includes a first power transistor and a second power...
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7440300 |
Transformerless power conversion circuit for grid-connected power generation systems
A transformerless power conversion circuit is interconnected with an electric grid and converts an input DC power provided by a power generator into an AC power and feeding the AC power into the...
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7436684 |
DC/DC-rectifier with reduced losses
A DC/DC-rectifier includes a transformer and a primary side bridge. The primary side bridge comprises a first pair of switches and a second pair of switches, and a secondary side bridge also...
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7436155 |
Control device for a three-phase machine and method for operating the control device
A control device for a three-phase machine contains an inverter, which can be connected on the input side to a direct voltage source and on the output side to the three-phase machine. The control...
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7433212 |
System linking apparatus for generated electric power
A system linking apparatus for generated electric power which may be made smaller and more efficient. The system linking apparatus is intended for connecting an electric power system to an output...
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7433216 |
Voltage control and harmonic minimization of multi-level converter
A controller applies a pattern of pulses to switching elements within a multi-level controller to effectuate control of the fundamental voltage magnitude and phase associated with the converter, as...
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