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| Number | Title | Issue Date |
| 7032695 | Vehicle drive module having improved terminal design A terminal structure for vehicle drive power electronics circuits reduces the need for a DC bus and thereby the incidence of parasitic inductance. The structure is secured to a support that may receive one or more power electronic circuits. The support may aid in re... | 04/25/2006 |
| 7034263 | Apparatus and method for inductive heating A system and method for inductive heating, in which a power source provides current pulses with high-frequency harmonics to a heater coil, the coil generating a magnetic flux for inductive heating of an article. The high-frequency harmonics enhance a relative propor... | 04/25/2006 |
| 7034264 | Heating systems and methods utilizing high frequency harmonics Heating systems and methods for inductive heating or a combination of resistive and inductive heating. A heater coil is inductively coupled to an article and a current signal is supplied to the heater coil. The heater coil generates a magnetic flux, based on the app... | 04/25/2006 |
| 7034501 | Adjusting gate pulse time intervals for reflected wave mitigation Methods and apparatus for controlling switching in a DC-to-AC inverter to prevent overvoltages applied to an AC motor by determining the switching order of the phase voltage signals, providing gating signals at switching intervals by modulating a carrier wave with t... | 04/25/2006 |
| 7034647 | Integrated magnetics for a DC-DC converter with flexible output inductor An integrated magnetic assembly that allows the primary and secondary windings of a transformer and a separate inductor winding to be integrated on a unitary magnetic structure is disclosed. The unitary magnetic structure includes first, second, and third legs that ... | 04/25/2006 |
| 7035032 | Method and system for reducing power consumption in a rotatable media data storage device Methods and systems in accordance with embodiments of the present invention can provide for reduced power consumption in rotatable media data storage devices. A voice coil motor driver configured to operate as a linear driver can be operated in a quasi-switch mode, ... | 04/25/2006 |
| 7030587 | Configuration of converter switches and machine coils of a switched reluctance machine A system for controlling a switch reluctance machine is provided. The system includes multiple phases located in the switch reluctance machine, each phase having multiple machine coils. Each machine coil is independently connected to a positive side switch circuit a... | 04/18/2006 |
| 7031174 | 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 drives the switches so as to force the output voltage to follow the refere... | 04/18/2006 |
| 7027315 | Circuit arrangement for operating an electrical machine A circuit arrangement for operating an electrical machine having an inductive component. The circuit arrangement includes an electrical switch (TR1 through TR6) that applies a pulse-shaped signal (S1 through S4) to the electrical machine.... | 04/11/2006 |
| 7026783 | Drive system A drive system includes a central power supply with a line-commutated converter and a DC/DC converter connected downstream of the line-commutated converter, and a plurality of inverters, each inverter having an output connected a load, for example a motor, and a DC ... | 04/11/2006 |
| 7023709 | Power converter A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side s... | 04/04/2006 |
| 7023145 | Backlight inverter for U-Shaped lamp Disclosed herein is a backlight inverter for a U-shaped lamp which is capable of detecting an abnormal state of an inverter circuit. The backlight inverter comprises a driver for supplying first and second transformer drive voltages in response to an operation contr... | 04/04/2006 |
| 7023718 | Two-phase driver and driving method A two-phase driver comprises two H-bridge circuits each of them including a transformer and two switch assemblies connected to the opposite terminals of the primary side of the transformer, in which one of the switch assemblies is shared by the two H-bridge circuits... | 04/04/2006 |
| 7019486 | Motor control device A control device of a motor used in, for example, electric power steering control of a vehicle has to monitor the operation thereof to execute such a processing as stopping the control without delay upon detection of error. However, conventional monitoring devices h... | 03/28/2006 |
| 7015673 | Method and apparatus for reducing generated heat in three-phase motors driving air circulation fans in large industrial refrigerators and freezers A method and apparatus is disclosed for reducing the heat generated by three-phase motors operating under load in cooled chambers such as industrial walk-in refrigerators and freezers. Specific control elements are introduced into the three power conductors connecte... | 03/21/2006 |
| 7016192 | Electrical power converter method and system employing multiple-output converters A support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support, in conjunction with other packaging features may form a shield from both external EMI/RFI ... | 03/21/2006 |
| 7016207 | Power inverter In a power converting apparatus including a capacitor connected in series which serves to divide a DC voltage, and a PWM inverter bridge for converting the DC voltage into an AC phase voltage having three electric potentials of a positive voltage, a negative voltage... | 03/21/2006 |
| 7016208 | Frequency feedforward for constant light output in backlight inverters In a method and system for an improved inverter providing power to a load, the inverter receives a direct current (DC) input. A plurality of switches included in the inverter are controlled by a plurality of control signals to generate an alternating current (AC) ou... | 03/21/2006 |
| 7012822 | Integrated traction inverter module and DC/DC converter Integrated power conversion systems and methods for use in an electric vehicle having an electric motor, a primary high-voltage energy source, and an auxiliary energy source including a traction inverter module operable for converting a DC current generated by the h... | 03/14/2006 |
| 7009829 | System, apparatus, and method for controlling lamp operation when subject to thermal cycling A system, apparatus, and method for preventing thermal cycling of a ballast coupled to one or more lamps. A monitor circuit is provided to monitor for activation of the ballast's thermal protection mechanism. Such monitoring may include monitoring of the ballast's t... | 03/07/2006 |
| 7009860 | Contactless power supply system A contactless power supply system that limits current to inductive wires, even when circuit load varies. The inductive wires are connected in series to a capacitor and a variable inductor to yield a capacitive impedance at a predetermined frequency f (e.g., 10 KHz).... | 03/07/2006 |
| 7009828 | Semiconductor switching device Self-quenching switching elements are connected in series in a semiconductor switching device. Snubber circuits including a diode, a capacitor, and a non-linear circuit are connected in parallel with the respective semiconductor switching elements. In the snubber ci... | 03/07/2006 |
| 7009850 | Soft switching converter using current shaping A converter topology that eliminates reverse recovery losses in its output rectifying semiconductor devices employs an AC injection voltage source in series with a power transformer primary winding. Input semiconductor switches in the converter's primary circuit are... | 03/07/2006 |
| 7005829 | System for precharging a DC link in a variable speed drive A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The... | 02/28/2006 |
| 7005762 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 02/28/2006 |
| 7002817 | DC-to-DC converter with improved transient response A DC to DC converter having improved transient response, accuracy, and stability. The DC to DC converter includes a comparator configured to compare a reference signal with a second signal. The reference signal has a DC offset determined, at least in part, by a DC r... | 02/21/2006 |
| 7002819 | Half-bridge inverter A half-bridge inverter achieves an inversion by switching an external-driven switch and a self-driven switch, and includes a transformer having a primary winding, a secondary winding and an auxiliary winding. The external-driven switch coupled to the first winding a... | 02/21/2006 |
| 6999328 | Controller circuit supplying energy to a display device A controller for controlling at least two power circuits comprises a pulse generator and a selector. The pulse generator generates a first pulse signal which is coupled to a first power circuit of the at least two power circuits for initiating the operation of the f... | 02/14/2006 |
| 6995994 | Converter and a method for controlling a converter The invention relates to a converter provided with a resonant circuit (16), which converter comprises a device (31) for measuring the derivative (dI/dt) of the current through the current valves 82, 3) and a detection device (32) co-opera... | 02/07/2006 |
| 6995996 | Power supply and control method thereof A power supply having a rectifying circuit rectifying AC power; an inverting part inverting the power rectified and supplying the inverted AC power to a load, and including first and second bridges connected to ends of the rectifying circuit and having respective pa... | 02/07/2006 |
| 6995537 | Closed-loop control system to mitigate PWM switching noise One aspect of the present invention provides a motor control system that includes a linear control system operative, in a linear mode, to provide a plurality of control signals for driving an associated motor based on an error signal. The system also includes contro... | 02/07/2006 |
| 6992527 | Digital power amplifier A digital power amplifier has first and second switches, between a high potential power line and a low potential power line, which operate complementarily. When switching an ON switch, dead time is provided to control power to a low-pass filter. In a switching secti... | 01/31/2006 |
| 6992908 | Method and arrangement for charging intermediate circuit of frequency converter A method and arrangement for charging an intermediate circuit of a frequency converter, the intermediate circuit of the frequency converter comprising one or more capacitors, and the frequency converter having means for charging the intermediate circuit, the means c... | 01/31/2006 |
| 6992902 | Full bridge converter with ZVS via AC feedback A soft-switched, full-bridge pulse-width-modulated converter and its variations provide zero-voltage-switching conditions for the turn-on of the bridge switches over a wide range of input voltage and output load. The FB PWM converters of this invention achieve ZVS w... | 01/31/2006 |
| 6982889 | DC/AC converter and its controller IC A semiconductor switch circuit is connected to a primary winding of a transformer having a secondary winding connected to a load. The semiconductor switch circuit has switches controlled by PWM to provide a controlled constant current. In the inventive inverter, con... | 01/03/2006 |
| 6980783 | Apparatus and method of controlling low frequency load currents drawn from a DC source in a telecommunications system A circuit controls the low frequency load currents drawn by components of telecommunications systems. The circuit includes a power converter, a first sense circuit, a second sense circuit, a comparator, and a power converter control circuit. The power converter cont... | 12/27/2005 |
| 6978213 | Voltage conversion system and method and recording medium A battery voltage is increased in a converter and is input to an inverter that supplies a motor with a motor drive current. A control unit detects input and output voltages of the converter from outputs of voltage sensors and controls the switching in the converter ... | 12/20/2005 |
| 6977823 | Switch power supply apparatus The present invention provides a power supply apparatus with a plurality of digital control units. Each digital control unit is used to control an independent output terminal for outputting a stable output voltage. The output voltage is not fed back to the primary s... | 12/20/2005 |
| 6977533 | 32V H-bridge driver with CMOS circuits A motor bridge driver interlace, implemented in an ASIC using cost-efficient CMOS technology, is designed to control four external MOS power transistors in a H-bridge configuration for DC-motor driving to achieve accurate and fast switching. Main components of the i... | 12/20/2005 |
| 6977224 | Method of electroless introduction of interconnect structures A method comprising introducing an interconnect structure in an opening through a dielectric over a contact point, and introducing a conductive shunt material through a chemically-induced oxidation-reduction reaction. A method comprising introducing an interconnect ... | 12/20/2005 |
