Bizarre Patents
Dining Table Having Integral Dishwasher
A space-saving dishwasher, which may be installed within a counter top or table, having a dish-carrying rack that is vertically shiftable through the open top of the dishwasher for facilitating loading and unloading of the dishes.
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| Number | Title | Issue Date |
| 7436686 | Reconfigurable voltage inverter with tolerance to failures Voltage inverter provided with four switching cells (Q1 to Q4) to be connected to the terminals of a DC voltage source (Vdc), each comprising two semiconductor switches (I11, I12, I21, I22, I31, I32, I41... | 10/14/2008 |
| 7417877 | Digital power supply with programmable soft start A system for controlling a soft start for a switching power converter includes a digital controller that enables the programming of a plurality of input voltage profiles during a soft start condition of the switching power converter. The programming of the plurality... | 08/26/2008 |
| 7368891 | Charge control method of capacitor in thyristor converter Charging time of a capacitor is shortened while avoiding erroneous firing due to distortion of a power supply voltage and sustaining an inrush current at a constant level. In the charge control method of a capacitor in a thyristor converter comprising a thyristor fo... | 05/06/2008 |
| 7361870 | Supply generator for an oscillating circuit, particularly for an induction cooking hob A supply generator for an oscillating circuit, includes an inductance (L) and a resonant capacitor (C3, C4), for operation at a fixed frequency and also includes at least one pair of transistors (I2, I2), operated on a var... | 04/22/2008 |
| 7321500 | Electric power converter A voltage source converter for high power application containing a plurality of valves, each valve containing a plurality of extinguishable semiconducting elements, and a valve control unit containing a computer and a pulse-width modulator providing an executing con... | 01/22/2008 |
| 7317998 | Method for the calculation and the assessment of the frequency spectrum of a matrix converter A method for the calculation of an output spectrum of a matrix converter in which m phases of a generator as an input are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix with n (n | 01/08/2008 |
| 7301301 | Electric car control apparatus In an electric car control apparatus for driving an induction motor, detection accuracy of a DC voltage is improved. A DC power supply device is provided which has a maximum potential terminal A, an intermediate potential terminal B, a minimum potential terminal C, ... | 11/27/2007 |
| 7294984 | Motor controller A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereb... | 11/13/2007 |
| 7218072 | Motor driving device, motor to be driven by the same device, and apparatus using the same motor A motor driving device includes a motor having three-phase driving coils, a power feeder for powering the coils, and a power feeding controller for controlling a power feeding method. The controller controls electrical potentials of the coils in a period of applying... | 05/15/2007 |
| 7187144 | Power converter and vehicle equipped with power converter A power source supplies an input voltage. A voltage conversion circuit converts the input voltage from the power source into an operating voltage to be used to drive an electric load. A detection circuit measures an insulation resistance value on the output side of ... | 03/06/2007 |
| 7173834 | Half-controlled silicon-controlled rectifying system and method thereof A half-controlled silicon control rectifying system and method thereof are provided. In this case, the first detection unit detects the zero cross phase of the triphase AC in input port thereof. The second detection unit detects the voltage of the DC bus. Then the c... | 02/06/2007 |
| 7173393 | Phase current detection method, inverter control method, motor control method, and apparatuses used in these methods Apparatus and methods for phase current detection used for driving a motor by supplying outputs from a pulse width modulation (PWM) converter to the motor. One method presented provides detecting a DC link current and a vector pattern, determining whether a voltage ... | 02/06/2007 |
| 7145266 | Parallel-connected inverters with separate controllers having impedance current regulators A control system (20) for a power converter (22) designed to convert DC power from a source (30) such as a battery, flywheel or fuel cell into AC power. The control system includes an impedance current regulator (106) for providing an imp... | 12/05/2006 |
| 7095630 | Capacitively coupled power supply A power supply includes a supply inductor and a first capacitor coupled to form a resonant circuit to generate a resonant waveform in a resonant operation, during a first portion of an operation cycle of the power supply. A charge storage element develops an output ... | 08/22/2006 |
| 7084609 | Alternator controlled rectifier A system and method for controlling the voltage output of an alternator is disclosed. The system includes an alternator having a rotor, which has a field winding, a stator having a plurality of phases, a rectifier bridge connected to the plurality of phases, at leas... | 08/01/2006 |
| 7072196 | Multi-stage high voltage solid state switch A method for triggering a high voltage solid state switch comprised of a set of thyristors connected in series. Initiating switch turn-on requires command triggering of only the lowest voltage thyristor, thereby eliminating the need for expensive high voltage pulse ... | 07/04/2006 |
| 7068526 | PWM inverter device A PWM inverter with a PWM pulse output. The PWM pulse signal is output upon magnitude comparison of phase voltage commands with a carrier wave of a triangular or a saw-tooth waveform. A maximum phase whose absolute value is a maximum among absolute values of phases ... | 06/27/2006 |
| 7060954 | Magnetron drive power supply Timing of zero voltage in zero-voltage detector for detecting zero voltage of a commercial power supply 1 is predicted and input from the zero-voltage detector 6 is received only for a given time before and after the predicted timing, whereby overvolta... | 06/13/2006 |
| 7049787 | Converter circuit with short-circuit current protection A converter circuit with short-circuit current protection having a DC voltage circuit (1) is proposed, which DC voltage circuit (1) is formed by a DC voltage circuit subsystem (2.1), the DC voltage circuit subsystem (2.1) having a first e... | 05/23/2006 |
| 7004016 | Probe system for ultrasonic processing tank The invention provides systems, methods and apparatus for processing delicate parts within a process tank such as an ultrasonic tank. Typically, one or more transducers connect to the tank and respond to drive signals from a generator to produce ultrasound within pr... | 02/28/2006 |
| 7006365 | Switching power supply apparatus A switching power supply apparatus is provided that is not thermally destroyed even if the load remains short-circuited for a long time when the voltage of the commercially distributed alternating-current power supplied thereto is high. When the load connected betwe... | 02/28/2006 |
| 6924991 | Energy transfer multiplexer An energy transfer multiplexer to control the flow of power or energy between an energy source and an energy load comprising a bi-directional inverter including a first bank or plurality of switches or first plurality of energy transfer control points and a second b... | 08/02/2005 |
| 6911790 | Multiplexed high voltage DC-AC driver A multiplexed high voltage DC-AC driver including multiple DC-AC switches and decoder logic. Each DC-AC switch receives an input DC voltage and is operative, when enable, to toggle its output at a rate based on a master clock signal and at a voltage based on the inp... | 06/28/2005 |
| 6643154 | Control of extinction angle for a line-commutated converter A method for control of an extinction angle of a line-commutated converter in dependence on a minimum reference value for the extinction angle. The converter has a plurality of valves, each one of the plurality of valves having at least one semiconductor ... | 11/04/2003 |
| 6624401 | Magnetron drive power supply Timing of zero voltage in zero-voltage detector for detecting zero voltage of a commercial power supply 1 is predicted and input from the zero-voltage detector 6 is received only for a given time before and after the predicted timing, whereby overvoltage ... | 09/23/2003 |
| 6462968 | Reverse conducting GCT (Gate Commutated Thyristor) and application of such a GCT A current source inverter (1) comprises a bridge circuit (2) having a plurality of bridge paths (5), in each of which a controllable power semiconductor component (6) is arranged. In the case of such an inverter, a loss in performance on account of induct... | 10/08/2002 |
| 6404656 | Control equipment for thyristor-controlled series capacitor equipment, and a method for control thereof Thyristor-controlled series capacitor equipment (CEQ), intended for connection between an ac network (NET) and a converter (CONV), connected thereto, for conversion between alternating current ((IT) and high-voltage direct current (Id), with a controllabl... | 06/11/2002 |
| 6304013 | Line termination network assembly for an electric motor An electric motor to be used with a termination network that is integral with the motor and connected to the motor's supply motor lines for reducing voltage between a motor terminal and a transmission line connected to a pulse width modulated drive when h... | 10/16/2001 |
| 6198646 | Commutation circuit for arresting and dissipating energy reflected from a magnetic pulse compression network An improved commutation circuit configured to arrest and dissipate energy which may be reflected from a magnetic pulse compression network. The commutation circuit includes an energy storage capacitor for storing energy, a capacitor charging unit for char... | 03/06/2001 |
| 6078217 | Electromagnetic, compatible clocked amplifier for a.c./d.c. current amplification An electromagnetic, compatible, clocked amplifier for d.c./a.c., current amplification including, for a single phase, a transistor power amplifier having at least one first switching transistor and at least one second switching transistor, and two diodes ... | 06/20/2000 |
| 5990654 | Apparatus for eliminating motor voltage reflections and reducing EMI currents An apparatus for essentially eliminating transmission line reflected waves and standing waves and for reducing common mode transient currents for use with a three phase motor controller, the apparatus including a common mode choke in series with a filter ... | 11/23/1999 |
| 5955794 | Method and arrangement for controlling the output of a load connected to an ac line voltage A method and arrangement for controlling the output of electrical consumers connected to ac line voltage, especially of electric motors and the like, in which the output is changed by changing the phase control of the electric alternating magnitude suppli... | 09/21/1999 |
| 5946205 | Power conversion system with series connected self-commutated converters A power conversion system including a plurality of converter transformers. AC side windings of the converter transformers are connected in series for connecting to an AC power system. The power conversion system further includes a plurality of series conn... | 08/31/1999 |
| 5896282 | Inverter circuit and integrated uninterruptible power supply protection system An uninterruptible power supply (UPS) system comprising an inverter for converting a DC voltage into an AC voltage comprising a full-bridge circuit having four silicon controlled rectifier (SCR) switches, two pulse control circuits for generating control ... | 04/20/1999 |
| 5889668 | Three-phase DC-to-AC power inverter with three-level poles A three-phase dc to-ac power inverter includes a dc power source with a first dc node for positive voltage, a second dc node for negative voltage, and a third dc node for zero voltage. A set of three-level pole circuits are connected to the first dc node,... | 03/30/1999 |
| 5880949 | Soft switching power converter comprising means for correcting the median voltage of a capacitive voltage divider A power converter comprises two main switches connecting an output either to the positive rail or to the negative rail. Two freewheel diodes for maintaining the current in the load, two snubbers and an auxiliary circuit including an auxiliary inductor in ... | 03/09/1999 |
| 5880947 | Control device for a PWM controlled converter having a voltage controller A control device for a PWM controlled converter having a voltage control portion for comparing with a voltage set value a detected value of a DC voltage output from the PWM controlled converter, connected through reactors to a 3-phase AC power source, for... | 03/09/1999 |
| 5859769 | Piloting system for electric inverter The MOSFETs or IGBTs of respective arms of an electronic inverter are in series with SCRs or TRIACs triggered into conduction during intervals of intended conduction of the respective MOSFETs or IGBTs connected to the high level rectifier terminal. The pi... | 01/12/1999 |
| 5854743 | Control system for power conversion system A control system for a power conversion system composed of a plurality of unit converters and a transformer for connecting AC outputs of the unit converters in series. The control system includes a unit for detecting an AC system voltage at the primary wi... | 12/29/1998 |
| 5798916 | High power inverter pole employing series connected devices configured for reduced stray loop inductance A high power inverter pole for a voltage sourced inverter suitable for providing compensation in electric power transmission and distribution systems, has a positive switching valve and a negative switching valve connected between closely spaced dc-source... | 08/25/1998 |
