Electric power conversion systems inventions 02/06

20060039169 - Power and information signal transfer using micro-transformers: A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and opening or closing a switch as...

20060039170 - 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 resonance circuit and a control circuit. In this arrangement, the transformer assembly is linked with the main bridge and...

20060039171 - On-load transformer tap changing system: The invention relates to an on-load transformer tap changing system wherein the secondary or primary of a transformer comprises at least one first and one second taps (p1, p2). A main connection circuit (tra-I2) is used for the permanent connection of the first tap (p1) or the second tap (p2)...

20060039172 - Circuit to improve capacitor hold-up time in a converter circuit: A circuit for increasing the bulk capacitor hold-up time in a converter circuit wherein the converter circuit comprises an input circuit for providing a DC bus voltage and a DC bulk capacitor connected across the output of the input circuit, and further comprising an output DC to DC converter circuit...

20060034101 - Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components: An energy transfer element having an energy transfer element input winding and an energy transfer element output winding. In one aspect, the energy transfer element input winding is capacitively coupled to the energy transfer element output winding. The energy transfer element is capacitively coupled to electrical earth. One or more...

20060034102 - Close-loop pwm controller for primary-side controlled power converters: A close-loop PWM controller for a primary-side controlled power converter is provided. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by measuring a primary-side switching current. An integrator generates a current-feedback signal by integrating the current-waveform signal with the discharge-time...

20060034104 - 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 amplitude values and using the peak values to identify...

20060034103 - Utility grid-interactive power converter with ripple current cancellation using skewed switching techniques: The invention is an electrical power conversion apparatus for converting DC voltage to poly-phase AC current where the AC current is supplied directly to the electric utility grid for power transfer into the grid. The power conversion apparatus has two or more separate, pulse modulated, high frequency power converters per...

20060034105 - Power source apparatus: There is provided a power source apparatus that includes a master circuit and a slave circuit provided in parallel and outputs an electric current that adds an electric current output from the master circuit and an electric current output from the slave circuit as a power-supply current. The master circuit...

20060034106 - Power converter in a utility interactive system: Consistent with an aspect of the present disclosure, a backup fuel cell, for example, is coupled to a utility power grid, through a power conversion circuit. The power conversion circuit may include an inverter circuit, pulse generating circuit and control circuit. The inverter circuit is configured to receive a DC...

20060034107 - Bipolar bootstrap top switch gate drive for half-bridge semiconductor power topologies: The invention is a method and apparatus for supplying both positive and negative gate drive power supply potentials to the top switch, in a typical half-bridge semiconductor power topology, from the bottom switch gate drive power supplies and without the use of transformer, capacitive or optical isolation. A known method...

20060034109 - 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 capacitor and a first diode; a switch controllable...

20060034108 - Synchronous rectifying switching power source circuit: In a synchronous rectification switching power supply circuit, a primary winding of a transformer and a main switching device are serially connected to a direct current input power supply. A secondary winding and a synchronous rectification device on the secondary side are serially connected between output terminals. A power supply...

20060034110 - Constant voltage control apparatus capable of reducing feedback lines: Provided is a constant voltage control apparatus capable of reducing feedback lines. In the constant voltage control apparatus, a first amplifier amplifies an output voltage applied to a pair of output terminals. A second amplifier amplifies a voltage drop between one of the output terminals and a load terminal connected...

20060028847 - Switching mode power supply and switching controller thereof: Disclosed is an SMPS for preventing abnormal overcurrents. A circuit having a short circuit delay is used to generate a control signal for turning off a main switch (i.e., a switching MOS transistor) when the overcurrent occurs, that is, in an initial startup or when a protection circuit is operated....

20060028848 - Multifunction hybrid intelligent universal transformer: A multifunction hybrid intelligent universal transformer includes a conventional transformer coupled with power electronics on the secondary side to enhance the functionality of power conversion. The universal transformer includes features for overcoming the deficiencies associated with conventional transformers, including voltage sag compensation, instantaneous voltage regulation, outage compensation, capacitor switching protection,...

20060028849 - Dc-dc converter: A step down DC-DC converter is reduced in the cost by reducing a number of capacitors included. The DC-DC converter is provided with switches that connect (n−1) capacitors in parallel with each other and switches that connect the capacitors in series with each other. In phase 1, some switches are...

20060028850 - Systems for auto-interleaving synchronization in a multiphase switching power converter: A plurality of single-phase synchronizing converter automatically synchronize on a peer-to-peer basis. Each synchronizing converter is configured as a DC-to-DC converter. The synchronizing converters operate in parallel as a multi-phase converter. A common bus between the synchronizing converters includes a sync line and a common phase control line. Proper phasing...

20060023474 - Push-pull switching power converter: A push-pull switching power converter includes, between high and low output terminals of a DC power source, a series circuit having a first switching device, a primary winding of a first transformer, a primary winding of a second transformer, and a second switching device in this order, and a series...

20060023475 - In-rush current limiter and method: An in-rush current limiter and method is provided. The in-rush current limiter reduces the maximum current that is drawn during system startup of an avionics system. During startup, power is provided through a power supply bus to a plurality of avionics units that are each coupled to the power bus....

20060023476 - Non linear controlled power supply with a linear soft start operation: A system for controlling a soft start for a switching converter includes a digital feedback control system for receiving an analog voltage signal representing the output of a switching converter, for digitally processing the analog voltage signal by comparing it to a corrected reference voltage to generate a voltage error...

20060023477 - Electronic apparatus: An electronic apparatus includes a main power supply including a main transformer and a first switching controller that switches an input power supply of the main transformer, and a standby power supply including an auxiliary transformer, a second switching controller that switches an input power supply of the auxiliary transformer,...

20060023479 - Pid based controller for dc-dc converter with post-processing filters: A digital PID controller for controlling the operation of a switching power converter is disclosed. A data converter is provided for converting the analog sense voltage to a digital sense voltage. A difference circuit then determines the difference between the digital sense voltage and a reference voltage as a digital...

20060023478 - Power conversion system: A power conversion system includes a power generating apparatus, an auxiliary generation device that consumes power, an auxiliary-devised power source, a secondary battery device chargeable and dischargeable with power generated by the power generating apparatus, a bilateral DC/AC inverter that causes the power generating apparatus to cooperate with a commercial...

20060023480 - Electrical power system for vehicles requiring electrical power while the vehicle engine is not in operation: A system for supplying electrical power for use when the vehicle engine is shut down and configurations of long-haul trucks employing the system are disclosed. The power system is a battery bank contained within an insulated enclosure. The batteries are heated when the truck is in operation with the insulated...