Panasonic Intellectual Property Management Co., Ltd.

Motohiko Fujimura

Atsushi Yamamoto

Taiki Nishimoto

Masahiro Yamaoka

Takehiko Yamakawa

Akira Kato

Kazuyuki Sakiyama

Shinya Kimura

Hiroshi Ogura

Eiji Nishimura

Yoshitake Nakagawa

Shigeru Nakabayashi

Toshihiko Bessho

Manabu Egawa

A power conversion device is equipped with at least one leg circuit containing two switching elements connected in series, respectively, a transformer having a primary winding and a secondary winding, a capacitor connected between the leg circuit and one end of the primary winding, a switch circuit, and a rectifier circuit. The switch circuit selectively connects one of a plurality of winding sections of the secondary winding that are different from each other to the rectifier circuit.

Power converter apparatus converting input power having a predetermined voltage into output power having a predetermined output voltage over wide range with higher efficiency

A power conversion device includes first and second components and pairs of engagement members each including male and female engagement members. The male engagement member includes an insertion part having a substantially flat plate shape. The female engagement member includes first and second clamping parts arranged to be opposed to each other. In each of the pairs of engagement members, the male and female engagement members are respectively arranged on one and another of the first and second components. The first and second components are coupled when the female engagement member clamps the insertion part inserted between the first and second clamping parts in each of the pairs of engagement members. Each of the first and second clamping parts is bent to form a projecting portion toward an opposed surface. A gap is provided at a distal end of each of the first and second clamping parts.

Power conversion device and component interconnection structure

A magnetic device includes a winding, and insulators by which the winding is surrounded. Each of the insulators is in contact with the winding. A gap exists between each two adjacent of the insulators in a winding direction of the winding.

Magnetic device including winding and insulators, and power conversion device using the same

An electromagnet device moves two moving contacts from one of a closed position or an open position to the other position when an electric current flows through a coil. A regenerative current coming from the coil flows through a regeneration unit when the coil makes a transition from an energized state where the coil is supplied with an electric current from a power supply to a non-energized state where the coil is supplied with no electric current from the power supply. The control unit causes the regenerative current to flow through a load by controlling a switch when the coil makes the transition from the energized state to the non-energized state.

Electromagnetic relay and control method thereof

A power converter apparatus is provided with: a plurality of leg circuits, each including two switch circuits connected in series between input terminals; a transformer including a primary winding and a secondary winding, the primary winding having a first terminal and a second terminal; and at least one capacitor. The at least one capacitor is connected between the first terminal or the second terminal of the primary winding of the transformer, and a node between the two switch circuits in at least one leg circuit among the plurality of leg circuits. The first terminal of the primary winding of the transformer is connected to at least two nodes between the switch circuits in at least two first leg circuits among the plurality of leg circuits, via at least two first circuit portions having at least one of capacitances and inductances different from each other, respectively.

Power converter apparatus including LLC resonant circuits and wide range of output voltage with higher efficiency

The power transmitter apparatus is provided with code modulators which modulate powers of phase components of three-phase alternating-current power to generate code-modulated waves, respectively, by code modulation using modulation codes based on code sequences different from each other, and transmits the code-modulated waves to the at least one power receiver apparatus via the transmission path. The power receiver apparatus is provided with code demodulators, each of which demodulates one code-modulated wave of the received code-modulated waves to generate code-demodulated power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation of the one code-modulated wave, the code-demodulated power being generated as power of one of phase components of multiphase alternating-current power.

Power transmission system including multiphase alternating-current power supplies and loads, and capable of transmitting power between different types of power supplies and loads

A code modulator transmits power to at least one code demodulator via a transmission path. The code modulator is provided with: a code modulation circuit to which output power of a power supply is supplied, the code modulation circuit modulating the output power of the power supply to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmitting the code-modulated wave to the code demodulator via the transmission path; and a control circuit that controls the code modulation circuit. The control circuit sets a frequency of the modulation code to a multiple of an output power frequency of the power supply.

Power transmission system capable of preventing power transmission efficiency from degrading due to frequency mismatch and loss of synchronization

A power receiver apparatus receives a code-modulated wave from a power transmitter apparatus via a transmission path, the code-modulated wave including first power modulated by code modulation using a modulation code based on a code sequence. The power receiver apparatus is provided with a contactless connector and a code demodulator. The contactless connector is coupled to the transmission path without electrical contact with the transmission path, and receives the code-modulated wave from the power transmitter apparatus via the transmission path. The code demodulator demodulates the received code-modulated wave to generate second power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation.

Power transmission system including power transmitter apparatus, power receiver apparatus, or power transmitter and receiver apparatus easily attachable and detachable to/from transmission path

A code modulator comprises: a first filter circuit connected between a pair of input ports, a second filter circuit connected between a pair of output ports, and a third filter circuit connected in parallel to each of switch circuits. A code demodulator comprises: a fourth filter circuit connected between a pair of input ports, a fifth filter circuit connected between a pair of output ports, and a sixth filter circuit connected in parallel to each of switch circuits.

Power transmission system preventing power transmission efficiency from degrading due to delay, and capable of reducing effects of high frequency noise

A current meter measures a current value associated with input power inputted to a code modulator. A code modulation circuit modulates the input power to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmits the code-modulated wave to the code demodulator via a transmission path. A control circuit controls the code modulation circuit. The code modulation circuit has operation modes different from each other depending on a direction of the input power, and a direction of the code-modulated wave to be generated. The control circuit generates waveform information indicating variations of direction of the input power over time, based on the current value measured by the current meter, and determines the operation mode of the code modulation circuit based on the waveform information.

Power transmission system capable of synchronizing power transmitter apparatus having multiple operation modes, with power receiver apparatus having multiple operation

A control circuit of a code modulator sets first to third states to a code modulation circuit. In first state, first and fourth switch circuits are on, and second and third switch circuits are off. In second state, first and fourth switch circuits are off, and second and third switch circuits are on. In third state, all first to fourth switch circuits are on during transition from the first to second state, and vice versa. A control circuit of a code demodulator sets fourth to sixth states to a code demodulation circuit. In fourth state, fifth and eighth switch circuits are off, and sixth and seventh switch circuits are on. In fifth state, fifth and eighth switch circuits are on, and sixth and seventh switch circuits are off. In sixth state, all fifth to eighth switch circuits are on during transition from fourth to fifth state, and vice versa.

Power transmission system preventing power transmission efficiency from degrading due to delay

An electric power conversion device includes: a transformer including first and second windings magnetically coupled; a bridge circuit including a switch element; a rectifier circuit coupled to an output side of the transformer; a first resonant inductor; a second resonant inductor external to the transformer; and a resonant capacitor, wherein n1&#x2265;n2, Cr&#x3e;C1, and Lr&#x3e;L2 where Lr is an inductance value of the first resonant inductor and L2 is an inductance value including an inductance value of the second resonant inductor and an inductance value of a parasitic inductance component that is in series with the second winding in the pathway from the second winding to the rectifier circuit.

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Osaka, Japan

Motohiko Fujimura