A harmonic harvesting circuit design for harvesting unrectified AC power contained in the fundamental and harmonic frequencies at the output of conventional rectifying circuits.

A phase controlled power regulation circuit is isolated from a line voltage and therefore overcomes some of the safety issues associated with currently available potentiometers. A phase controlled power regulation circuit employs a potentiometer that is electrically isolated from mains power. A transformer regulates the line voltage down to a reduced reference voltage that is used by the power regulation circuit. Any single point failure of a component within the power regulation circuit will not create unsafe condition. This greatly simplifies regulatory approval and opens new applications. Since the potentiometer is operated at low voltage, it may be remotely located from the circuits that handle the power with two conductors of class 2 wiring. Also, the potentiometer need not be of a panel mounted rotary or sliding type. It may be a potentiometer integrated circuit controllable from a microprocessor that enables complex regulation and/or sequencing control.

The invention relates to an electric circuit arrangement for the input protection circuit of a switching power supply, having a surge protection circuit, which is contacted with a supply voltage on an input side and to which a current-compensated choke is connected as a suppression component, said current-compensated choke being connected to a rectifier circuit comprising an energy storage means on an output side. Via modifications to the circuit technology, such as using two varistors as surge protections, and by using suitable switching elements, such as silicon diodes as rectifier elements and ceramic capacitors as an energy storage means, the input protection circuit is designed such that the requirements, which an expanded input voltage range demands of a surge circuit, are fulfilled. Furthermore, the invention relates to a switching power supply having an electric circuit arrangement according to the invention for the input protection circuit.

An improved method of providing high burst power to audio amplifiers from limited power sources, using parallel power paths to increase system efficiency without need for a power path controller, thus utilizing a simplified circuit operation and maximizing average power available for both the amplifier and supporting circuitry.

Converter with oscillator characterized in that it comprises an input for connecting the phase through a first node to cathode of a first diode as well as to anode of a second diode, where the first diode has anode connected through a third node to anode of a third diode as well as to a first output, wherein cathode of a third diode is connected through a fourth node to the anode of a fourth diode as well as to neutral conductor or to a second phase as well as to a second output, wherein the fourth diode has an anode connected to a third output and through a second node to the cathode of the second diode, wherein parallelly to the second node and to the third node at least one oscillator circuit comprising a bifilar coil with a first winding and a second winding and at least one capacitor is connected. Another object of the invention is a system comprising a converter with oscillator and a load as well as a three-phase system.

An electronic transformer includes a first forward rectifier, a second forward rectifier, a third forward rectifier and a backward rectifier. The first forward rectifier is coupled between a first-phase power and a first output terminal. The second forward rectifier is coupled between a second-phase power and the first output terminal. The third forward rectifier is coupled between a third-phase power and the first output terminal. The backward rectifier is coupled between a neutral line and a second output terminal. The first forward rectifier, the second forward rectifier, and the third forward rectifier are configured to half-wave rectify the first-phase power, the second-phase power, and the third-phase power to generate rectified first-phase to third-phase power sources, and superimpose the rectified first-phase to third-phase power sources on the first output end to serve as an output voltage of the electronic transformer.

A high voltage rectifier includes: a power divider (2) dividing power of high-frequency wave RF to be rectified; a capacitor (3) cutting-off direct current flowing between the power divider (2) and a first rectifier (10): and a capacitor (4) cutting-off direct current flowing between the power divider (2) and a second rectifier (20). The first rectifier (10) generates a direct-current voltage DC.sub.1 by rectifying a high-frequency wave RF.sub.1 output from the power divider (2), and outputs the direct-current voltage DC.sub.1 to one end of a load (7). The second rectifier (20) generates a direct-current voltage DC.sub.2 having a different polarity from that of the direct-current voltage DC.sub.1 by rectifying high-frequency wave RF.sub.2 output from the power divider (2), and outputs the direct-current voltage DC.sub.2 to the other end of the load (7).

A vehicle on-board electrical system having an AC voltage charging connection, a rechargeable traction battery, which is designed as a high-voltage rechargeable battery, and a power factor correction filter. The power factor correction filter connects the AC voltage charging connection directly to the rechargeable traction battery. The operating voltage range of the rechargeable traction battery is within the output voltage range of the power factor correction filter.

An improved method of providing high burst power to audio amplifiers from limited power sources, using parallel power paths to increase system efficiency without need for a power path controller, thus utilizing a simplified circuit operation and maximizing average power available for both the amplifier and supporting circuitry.

An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6.