Bizarre Patents
A sealed crustless sandwich for providing a convenient sandwich without an outer crust which can be stored for long periods of time without a central filling from leaking outwardly.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7978485 | Thyristor power control circuit with damping circuit maintaining thyristor holding current A thyristor power control circuit reduces EMI and maintains a holding current in the thyristor to prevent flickering at a load. The power control circuit includes a thyristor configured to receive an input AC voltage, and responsive to a gate pulse generates a modif... | 07/12/2011 |
| 7978486 | Rectifier circuit and radio communication device using the same A rectifier circuit includes an input terminal that receives an alternating-current signal, a first rectifier circuit that generates a first direct-current voltage from the alternating-current signal, a bias-voltage generating circuit that generates a bias voltage f... | 07/12/2011 |
| 7898829 | Rectifier circuit and three-phase rectifier device Choppers are provided respectively in the output stages of two diode bridges, and their output sides are connected in parallel to a smoothing capacitor. By controlling the operations of the two choppers, the currents which are allowed to be inputted to the diode bri... | 03/01/2011 |
| 7898828 | Charger for an industrial truck Charger for an industrial truck which has an asynchronous machine and a three-phase AC control unit for converting a battery voltage for the asynchronous machine, said charger having a mains power module which applies an AC voltage to one or two motor connection lea... | 03/01/2011 |
| 7869234 | Poly-phase AC/DC active power converter A three-phase AC/DC active power converter provides an H-bridge that is controlled by a DSP (digital signal processing) controller that places the H-bridge in a voltage-boost mode of operation when voltage of a DC-link capacitor maintained by the H-bridge is near th... | 01/11/2011 |
| 7843709 | Rectifier circuit and radio communication device using the same A rectifier circuit includes an input terminal that receives an alternating-current signal, a first rectifier circuit that generates a first direct-current voltage from the alternating-current signal, a bias-voltage generating circuit that generates a bias voltage f... | 11/30/2010 |
| 7746675 | Asymmetrical interleaving strategy for multi-channel power converters In a power converter having m=two or more channels of power factor correction (PFC) circuits connected in parallel and an electromagnetic interference (EMI) filter connected in series therewith, phase shifts in switching between the respective PFC channels can allow... | 06/29/2010 |
| 7738270 | Power supply device A power supply device with power conversion capabilities is disclosed. The power supply device comprises an input module, a power converter, and an output module. The input module is used for receiving an alternating current power. The power converter is coupled to ... | 06/15/2010 |
| 7643317 | Power converting device and method for controlling the same In a system to which a fluctuating load is connected, compensating for fluctuation in voltage harmonics at the load connecting point and fluctuation in system current harmonics has been difficult for a power converting device connected in parallel with the load. To ... | 01/05/2010 |
| 7609535 | Method and apparatus for providing input EMI filtering in power supplies A power supply electromagnetic interference (EMI) filter circuit and technique. In one embodiment, a method of filtering EMI in a power supply includes rectifying an AC signal from an AC source, smoothing the rectified AC signal with a bulk storage capacitor to prov... | 10/27/2009 |
| 7593243 | Intelligent method for DC bus voltage ripple compensation for power conversion units A power conversion system having a DC power distribution bus includes multiple power converters connected to the DC power distribution bus with modulation frequencies synchronized so that providing phase shifts between the different modulations has the effect of com... | 09/22/2009 |
| 7529106 | Voltage monitoring device and inverter device A voltage monitoring device 30 includes an AC input portion 31, a rectifier circuit 32, and a detection circuit 33. The AC input portion 31 receives alternating current output from a DC-AC inverter unit 13. The rectifier cir... | 05/05/2009 |
| 7502238 | Rectifier for reducing current harmonics from unbalanced source A rectifier includes a transformer, a rectifying bridge, a link capacitor, and at least a first resonance loop. The transformer is operable to receive three phase input signals having a source frequency and generate a plurality of transformer phase signals. The rect... | 03/10/2009 |
| 7483280 | Capacitive power supply circuit and method A capacitive power supply circuit, comprising a power storage element between two output terminals for providing a rectified output voltage; in series between a first input terminal for applying an A.C. voltage and a first of the output terminals, at least one capac... | 01/27/2009 |
| 7443705 | Apparatus and method for power conversion having diode in charging and discharging circuit A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The cha... | 10/28/2008 |
| 7433213 | Thyristor power converter filter for excitation applications An exciter system for the field of a synchronous generator excitation is provided. The exciter system includes an AC power source; a three-phase thyristor bridge having six legs, the three-phase bridge being connectable with the AC power source, and being adapted to... | 10/07/2008 |
| 7420351 | Power-factor correction device for variable speed drive A variable speed drive for a three-phase electric motor, including a rectifier module supplying a rectified voltage from a single-phase alternating current network, a voltage step-up module supplying a regulated bus voltage, and an inverter module supplying a contro... | 09/02/2008 |
| 7382112 | Methods and devices for input waveform control in switching power supplies The invention recognizes that filter size can be reduced substantially as power factor is permitted to deviate below unity in systematic ways. Preferred methods of the invention provide specific, computable waveforms that permit use of a minimum filter size given a ... | 06/03/2008 |
| 7375989 | AC/DC converter and method of modulation thereof A method and apparatus for modulating a discontinuous conduction mode (DCM) Boost Rectifier having a switchable booster section is disclosed. A modulation signal is defined according to the equation, TON(φ)=f1(φ)+f2(φ)+f3(φ). Here, φ defines a phase ... | 05/20/2008 |
| 7364606 | Exhaust emission control device Provided are a hollow inner electrode constituted by an electrically conductive filter capable of capturing particulates, a cylindrical outer electrode circumferentially surrounding the electrode, a housing incorporated in a flow passage of exhaust and accommodating... | 04/29/2008 |
| 7353771 | Method and apparatus of providing power to ignite and sustain a plasma in a reactive gas generator According to a first aspect, a power supply and a method of providing power for igniting a plasma in a reactive gas generator is provided that includes (i) coupling a series resonant circuit that comprises a resonant inductor and a resonant capacitor between a switc... | 04/08/2008 |
| 7355865 | Method and apparatus for rejecting the second harmonic current in an active converter with an unbalanced AC line voltage source A method and apparatus for altering converter control as a function of the degree of unbalance in supply line voltages to substantially eliminate second harmonics on the supply lines caused by active control of the converter including identifying supply line peak am... | 04/08/2008 |
| 7355868 | Current sense method for bridgeless boost (BLB) PFC circuit using single current transformer A circuit and method for improving current sensing in a bridgeless PFC boost converter. Such a converter comprises a current transformer having first and second primaries; a boost inductor having a first end connected to a first AC input terminal and a second end co... | 04/08/2008 |
| 7336904 | Electro-magnetic interference reduction filter for an optical transceiver An optical transmit circuit that includes an electro-optic transducer driver and an electro-magnetic interference (“EMI”) reduction filter. The EMI reduction filter is coupled to an output terminal of the electro-optic transducer driver. This allows the EMI redu... | 02/26/2008 |
| 7324331 | System and method for providing and receiving electric power through telephone wire-pairs Converter modules for providing and receiving electric power through a single telephone wire-pair and related systems and methods. In one embodiment, a converter module for providing electric power to a single telephone wire-pair includes: (1) a DC/DC boost converte... | 01/29/2008 |
| 7321835 | Method for improving the mode of operation of a matrix converter A method for operating a matrix converter in which m phases of a generator generating alternating voltage with n (n | 01/22/2008 |
| RE40016 | Power factor correction control circuit A power factor control circuit for an AC to DC power converter includes an inductor receiving AC rectified power. The charging time of the inductor is controlled by a switching circuit based on a comparison between a DC bus voltage and a fixed reference voltage. The... | 01/22/2008 |
| 7317624 | Power factor correction method and apparatus and power supply using the same A power factor compensation method and apparatus adapted for use in a power supply which provides direct-current (DC) power via a capacitive input type smoothing circuit, and an improved power supply using the same. The power factor compensation method can correct a... | 01/08/2008 |
| 7301736 | Method and device for shutting down a drive with a matrix converter during a power outage A method and a device for shutting down a drive during a power outage are disclosed. The method and device include a matrix converter, several commutation capacitors on the power line side, a switch unit on the power line side and a resistor unit. During a power out... | 11/27/2007 |
| 7292020 | Remote DC-DC converter for high current, low voltage applications A remote voltage regulator module (VRM) for high-current, low voltage applications. In one embodiment, an electronic system includes a VRM configured to provide a DC output voltage. The VRM is coupled to a load board via a first bus bar and a second bus bar. The VRM... | 11/06/2007 |
| 7285919 | Electronic ballast having improved power factor and total harmonic distortion An electronic ballast for driving a gas discharge lamp includes a rectifier, a valley-fill circuit, an inverter having first and second series-connected controllably conductive switches having complementary duty cycles, a control circuit for controlling the controll... | 10/23/2007 |
| 7282980 | Precision rectifier circuit for high-density, low-power implantable medical device A precision voltage rectifier comprises a source voltage input and a voltage reference. The rectifier comprises switching elements that, according to the sign of the source signal, change the connections to the inputs of a differential difference amplifier that is c... | 10/16/2007 |
| 7279878 | Output regulating device for regulating output of electric power source depending on input therefrom If an input voltage to an output control device is above a lower limit value, the output control device operates in a constant voltage control mode for maintaining an output voltage at a substantially constant voltage. If the input voltage of the output control devi... | 10/09/2007 |
| 7276859 | Three-phase electronic ballast with improved three-phase EMI filter A ballast (20) for powering at least one gas discharge lamp (52) from a three-phase AC voltage source (30) comprises a three-phase rectifier circuit (200), a high frequency filter capacitor (300), a high frequency inverter (400 | 10/02/2007 |
| 7252088 | Methods of powering medical equipment for the treatment of sleep apnea An uninterruptible D.C. battery backup power supply is designed to operate medical respiratory treatment equipment such as a machine for the treatment of sleep apnea. A power supply with D.C. backup consists of a rectifier/charger, a rechargeable battery and a D.C.-... | 08/07/2007 |
| 7250694 | Power-saving control module for an electrical appliance In a power-saving control module for an electrical appliance that includes a DC power supply and a remote control receiver, a switch component serves to make or break electrical connection between an AC power source and the DC power supply, a diode provides a path f... | 07/31/2007 |
| 7239200 | Power amplifying apparatus A power amplifying apparatus which is of a switching type and capable of efficiently amplifying a power of an input AC signal such as an acoustic signal, includes a first switch circuit (11) and a second switch circuit (12) to which a power supply volt... | 07/03/2007 |
| 7236383 | Detection of the zero crossing of an A.C. voltage A circuit for detecting the zero crossing of a variable voltage across at least one switching element, including circuitry for measuring the slope of the voltage when it varies in a given direction, and for indicating a zero crossing if this slope is comprised withi... | 06/26/2007 |
| 7233506 | Low kVA/kW transformers for AC to DC multipulse converters A polygon connected autotransformer in conjunction with zero sequence blocking inductor(s) enables multipulse AC to DC converters to use lower kVA parts rating by using appropriate phase-shifted voltage sets in conjunction with inductors that extend the conduction p... | 06/19/2007 |
| 7227762 | Fine-tuning circuit for the winding voltage of a transformer A fine-turning circuit is used for adjusting the output voltage of a main transformer in an electrical power convert device and solving the problem of turns granularity of conventional transformers. The fine-turning circuit includes an auxiliary transformer having a... | 06/05/2007 |
