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| Number | Title | Issue Date |
| 7352134 | Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control A lamp contains a lamp voltage conversion circuit within the lamp and connected to a lamp terminal. The voltage conversion circuit includes a phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control cli... | 04/01/2008 |
| 7336463 | Device and method for dimming service loads A device and method are provided for detecting and configuring a solid state dimmer when wired in series or parallel with a load powered by an alternating current (AC) input. The device can comprise a microcontroller configured to be powered by the AC input. A zero-... | 02/26/2008 |
| 7291984 | Method of reducing RMS load voltage in a lamp using pulse width modulation A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. Conduction is t... | 11/06/2007 |
| 7274149 | Lamp with integral pulse width modulated voltage control circuit A lamp has a voltage controller that converts a line voltage to an RMS load voltage suitable for operation of the lamp's light emitting element, where the voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltag... | 09/25/2007 |
| 7274148 | Lamp having fixed forward phase switching power supply with time-based triggering A lamp contains a lamp voltage conversion circuit that is entirely within a base for converting a line voltage at a lamp terminal to an RMS load voltage at a light emitting element. The voltage conversion circuit includes a forward clipping circuit with a three-term... | 09/25/2007 |
| 7129872 | Audio signal analog-to-digital converter utilizing a transformed-based input circuit An apparatus for converting an input analog audio signal into digital form including an analog-to-digital converter. An amplifier circuit and step-down transformer provide an interface for the input analog audio signal to the analog-to-digital converter. The step-do... | 10/31/2006 |
| 7116062 | Method of soft-starting a switching power supply including pulse width modulation circuit A method of operating a power controller that converts a line voltage to an RMS load voltage includes a soft start in which a duty cycle of a pulse width modulation circuit is gradually increased to a steady state value that defines the RMS load voltage. The control... | 10/03/2006 |
| 7091706 | Voltage regulator and method of regulating voltage A voltage regulator includes a load control unit having an output configured to be coupled to a load. The load control unit is configured to be responsive to a load control signal for controlling the delivery of power to the load. A voltage regulator further include... | 08/15/2006 |
| 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 |
| 7057311 | Isolation contactor assembly having independently controllable contactors The present invention provides an electrical isolation apparatus having independently controllable contactors. The isolation apparatus includes a contactor for each phase or pole of an electrical device as well as each phase or pole of a load. Each contactor is cons... | 06/06/2006 |
| 7053562 | Lamp containing soft-start power supply A lamp includes a lamp voltage conversion circuit which converts a line voltage to an RMS load voltage by clipping or modulating a load voltage. The voltage conversion circuit includes a time-based signal source that triggers conduction in the voltage conversion cir... | 05/30/2006 |
| 7049758 | Method of soft-starting a switching power supply having time-based pulse triggering control A method of operating a power controller that converts a line voltage to an RMS load voltage includes a soft start in which a conduction angle or duty cycle is gradually increased to a steady state value that defines the RMS load voltage. The controller has a circui... | 05/23/2006 |
| 7010436 | Method and device for prediction of a zero-crossing alternating current An apparatus (14) for detecting a zero-crossing of an alternating current after occurrence of a fault in a current path (2) for determining a suitable time for opening an electric switching device (2) arranged in the current path for breaking th... | 03/07/2006 |
| 6849834 | Apparatus for cycle-skipping power control In one embodiment of the present invention, a power controller for an AC load comprises: a user interface adapted to interact with a user to produce at least one user interface signal; and a control module adapted to electrically couple a line voltage supply, electr... | 02/01/2005 |
| 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 |
| 6610926 | Junction box A junction box (10) is constituted by a junction box body (14), on which a fuse outlet (11e) is formed, and a casing (18) for housing the junction box body (14). The casing (18) is formed by a lower case (17) for housing the junction box body (14), and an... | 08/26/2003 |
| 6605780 | Connection box A connection box includes a wiring board. The box includes a control board connected to the wiring board. The control board including a control device and another device separated thereinto. Another device has generation heat greater than the control devi... | 08/12/2003 |
| 6351692 | Method and apparatus for configuring a genset controller for operation with particular gensets A genset controller that is configurable for controlling a variety of types of gensets, as well as a method of configuring a genset controller for controlling a genset, are disclosed. The genset controller includes a memory for storing a plurality of soft... | 02/26/2002 |
| 6271653 | Power supply operable with wide input range An arrangement provides a power supply for low voltage circuits that is connected to receive and store energy from a power electronics switch that is connected to an alternating current supply. The power supply is operative over a wide range of input and ... | 08/07/2001 |
| 5932128 | Switching control system for heating panel with leakage current cancellation A heating panel has a substrate with a resistive heating material disposed thereon. The substrate can be metal with an insulating layer disposed between the substrate and the heating layer. Alternatively, the substrate can be glass ceramic. The heating la... | 08/03/1999 |
| 5867016 | Duty cycle based AC power control with reduced voltage fluctuations A duty cycle based AC power control method reduces objectionable voltage fluctuations at a frequency that causes "flicker" by shifting the frequency of actuations of controlled devices to frequencies significantly greater than and/or less than the flicker... | 02/02/1999 |
| 5757168 | Primary regulator for an unregulated linear power supply and method A primary regulator having a zero-crossing detector and a voltage reference coupled to a processor is provided. The processor controls the on time of a primary transformer via a switching device isolated from the processor via a coupler A method of regula... | 05/26/1998 |
| 5754036 | Energy saving power control system and method Apparatus and methods for AC power regulation for a wide range of complex capacitive and inductive loads which provide substantial reduction in power consumption while also providing a leading power factor. The system is self-adjusting for a wide range of... | 05/19/1998 |
| 5585713 | Light dimmer circuit with control pulse stretching A dimmer circuit uses a triac for controlling application of power to a hot terminal where a load will be connected. A DC power supply develops DC power for powering a control circuit which includes a zero crossing detector circuit connected to an integra... | 12/17/1996 |
| 5559426 | Synchronous contactor A contactor for selectively connecting at least one alternating current (AC) power line to a load and sourcing an AC current having periodic zero crossings includes a fixed contact; a movable contact mechanism; an operating mechanism for engaging and movi... | 09/24/1996 |
| 5519311 | Control of AC power to inductive loads A control system is provided for controlling the average power from an alternating voltage source (AC) to a load having inductive properties. The system uses a synchronous switch shunted by a capacitor connected between the source (generator) and sink (lo... | 05/21/1996 |
| 5483149 | Resistive heating control system and method that is functional over a wide supply voltage range This present invention takes advantage of the understanding that the voltage rating associated with resistive heating element can be ignored over the common line voltage range, provided the power dissipation is controlled. This is accomplished by applying... | 01/09/1996 |
| 5397874 | Electric automatic temperature control A temperature control circuit is disclosed utilizing automatically either the electric heating (or cooling) element or a separate sensor to measure the instantaneous temperature of the thermal load device. Either a pulsating dc or an ac electric power sou... | 03/14/1995 |
| 5365157 | Voltage regulator employing a triac to deliver voltage to a load An alternating current voltage regulator providing a stable RMS output voltage across a load. The voltage applied to the load being determined by controlling the firing angle of a triac, which is controlled by the pulse width of a timing signal generated ... | 11/15/1994 |
| 5293111 | Method for minimizing the switching loss in a power switch A switching current converter is connected in parallel with each controlled power switch in an electric circuit so that it is allowed to operate from the input voltage and transfer energy from input to output during the turn-on periods of the controlled p... | 03/08/1994 |
| 5293028 | Cooktop appliance with improved power control A cooking appliance adapted for energization by a standard domestic household power supply employs a power control arrangement which accommodates electric resistive heating units designed for operation at a maximum RMS voltage level less than the RMS volt... | 03/08/1994 |
| 5216352 | Solid state current controlled interruption system A solid state circuit interruption arrangement monitors a current path to provide protection to both a load and a solid state switch. The arrangement includes an energy absorber for absorbing energy from the current path in response to the solid state swi... | 06/01/1993 |
| 5180950 | Power-factor-corrected electronic ballast In a power-factor-corrected electronic ballast, an AC/DC converter comprises a half-bridge electronic self-oscillating inverter powered from non-filtered full-wave-rectified 120 Volt/60 HZ power line voltage, and its resulting amplitude-modulated 30 kHz o... | 01/19/1993 |
| 5128604 | Two phase power control of a three-phase load circuit A three-phase transformer is supplied by a three-phase AC line voltage. Two phases are connected via switches comprising head-to-tail connected thyristors. The third phase is connected directly to the transformer. The switches are of the zero voltage swit... | 07/07/1992 |
| 5053596 | Apparatus and method of induction-hardening machine components with precise power output control An induction-hardening machine for the contour hardening of machine components such as gears includes a system processor which controls thyristor power switching circuits which supply high-power signals to an RF generator. Power switching circuits include... | 10/01/1991 |
| 5025134 | Means for refreshing a triac control circuit power supply An electronic controller comprising two input terminals between which an AC line and an electrical load are connected in series. A processing unit generates a command signal to control the supply of electrical power to the electrical load which closes an ... | 06/18/1991 |
| 5004969 | Phase control switching circuit without zero crossing detection A method and circuit for reverse phase control of alternating current being delivered to a load are disclosed wherein voltage-controlled semiconductor switches, such as MOSFET's and IGBT's, are used as electronic switches to conduct voltage during the lea... | 04/02/1991 |
| 4928055 | Control circuit for heat fixing device for use in an image forming apparatus A control circuit for heat fixing device for use in an image forming apparatus is disclosed. The control circuit comprises device for detecting a power source voltage, device for detecting zero-crossing points of the power source voltage, device for deter... | 05/22/1990 |
| 4900900 | Method and apparatus for controlling a-c power by means of thyristors for a resistance-type electric furnace A method of controlling a-c power by means of thyristors for resistive electric furnace for achieving a temperature control thereof, comprises providing an output which varies between O and N cycles in response to an input analog signal which also varies ... | 02/13/1990 |
| 4878011 | Proportional firing circuit A relay control circuit which is capable of reliably controlling the transmission of electrical power in very small time increments. Specifically, the present invention features a proportional firing circuit which will create an SCR firing signal whose pu... | 10/31/1989 |
