Daihen Corporation

Matsushita Electric Industrial Co., Ltd.

Other

Panasonic Corporation

Matsushita Electronics Corporation

Hiroyuki Kotani

Hirotaka Takei

Hiroyuki Naka

Junji Ikeda

Nobuyuki Aoki

Yoshifumi Ibuki

Masato Mitani

Nobutaka Hokazono

Kazuto Nakajima

Akira Yamaguchi

Masao Yokota

Hiroaki Oichi

Tatsuya Ikenari

Hirotaki Takei

Hiroyuki Hashimoto

Kenichi Terai

Michio Taniguchi

Ryohei Tanaka

Hiroshi Matoba

Hiroyuki Ito

Yoshiki Fukumoto

Masami Yasui

Toshikazu Murai

Hiroaki Mizoguchi

Tamotsu Ueno

Tetsuji Akaki

Nobuo Moritani

Naoki Urai

A high-frequency power supply circuit includes an amplifier circuit. In the amplifier circuit, one end of an inductor is connected to a direct-current power supply. One end of a switching element is connected to the other end of the inductor. A parallel capacitor is connected in parallel to the switching element. One end of an LC series circuit is connected to the one end of the switching element. A circuit capacitor is connected between the other end of the LC series circuit and the other end of the switching element. The amplifier circuit amplifies a signal having a unique frequency input to a control terminal of the switching element. The amplifier circuit outputs, to a load, a current having the frequency from a connection point between the other end of the LC series circuit and the circuit capacitor.

High-frequency power supply circuit and determining method of constants of amplifier circuit

A vehicle system provided according to one aspect of the present disclosure includes a power transmitter and a vehicle. The power transmitter is placed at one of at least one charge position. The vehicle includes: a power receiver, a capacitor, and a motor. The power receiver wirelessly receives first electric power from the power transmitter, and outputs second electric power deriving from the first electric power. The capacitor stores the second electric power output by the power receiver such that the capacitor is charged from a first voltage Vcto a second voltage Vc. The motor is driven by the second electric power from the capacitor. The vehicle automatically travels a distance Dx along a route from one to a next one of the at least one charge position on the route. The distance Dx satisfies a certain relationship.

Vehicle system

A contactless power transmission system is provided for supplying power contactlessly from a power transmission apparatus to a power reception apparatus. The power transmission apparatus includes a high-frequency power source device for outputting a constant high-frequency current, and power transmission units having serial resonance circuits. The power reception apparatus includes power reception units having parallel resonance circuits. A power transmission coil of the power transmission unit and a power reception coil of the power reception unit are magnetically coupled. The power transmission units are connected in series, while the power reception units are connected in parallel. Power is transmitted from the power transmission unit to the power reception unit by magnetic field resonance.

Contactless power transmission system

A power transmitter provided according to one aspect of the present disclosure includes a high-frequency power source device, a power transmitting unit, and a transmitter-side controller. The high-frequency power source device generates high-frequency power. The power transmitting unit includes a power-transmitting coil. The power transmitting unit wirelessly transmits the high-frequency power received from the high-frequency power source device to a power receiver mounted on an electric vehicle. The transmitter-side controller calculates a transmitter usage rate. The transmitter-side controller causes the power transmitting unit to stop power transmission in response to the transmitter usage rate exceeding a predetermined threshold. The transmitter usage rate indicates a rate of time during which the power transmitting unit transmits power to the power receiver per unit time.

Power transmitter, power receiver, and wireless charging system

A high-frequency power supply system includes an anomaly detectorwhich detects an anomaly occurring in a circuit on the side of a load L as from an outputting end A of a high-frequency power source. The anomaly detectorincludes a first detectorwhich detects a voltage value Vf of a high-frequency forward wave, a second detectorwhich detects a voltage value Vr of a high-frequency reflected wave, a reflection coefficient calculatorand a differentiatorwhich calculate a reflection coefficient differential value d&#x393;/dt from the forward wave voltage value Vf and the reflected wave voltage value Vr, and an anomaly determinerwhich determines of an occurrence of an anomaly based on the reflection coefficient differential value d&#x393;/dt. When the anomaly detectoroutputs an anomaly detection signal to the high-frequency power source, high-frequency power sourcestops its power output operation.

High-frequency power supply system

Provided is an audio reproduction device capable of immediately starting to reproduce audio data, particularly compressed audio data, from an arbitrary point in a forward or a backward direction at an arbitrary speed. In the case where data, to be reproduced, which is stored in a storage device is compressed data, the compressed data is temporarily stored in a RAM. Then, the stored compressed data is decoded by a decoder, thereby extracting a segment of PCM data. The segment of PCM data is supplied to a PCM data buffer formed in a RAM via a reproduction controlling microcomputer. Based on an operation of a rotational operation element, the PCM data stored in the PCM data buffer formed in the RAM is reproduced by a reproduction processing circuit, thereby reducing a rapid change in reproduction speed.

Audio reproduction device

A high frequency power supply includes a DC source unit () that outputs a DC voltage Vdc having an output level corresponding to a target voltage, an oscillation unit () that outputs a high frequency voltage signal having an output level corresponding to a target power, an amplification unit () that includes a plurality of amplifying elements, and amplifies and outputs the high frequency voltage signal output by the oscillation unit () utilizing the DC voltage output by the DC source unit (), an output voltage detection unit () that detects an amplitude of the voltage between the amplified-side terminals of the amplifying elements in the amplification unit (), or an amplitude of a voltage that is proportional to the amplitude of the voltage between the amplified-side terminals, and a target voltage decision unit () that decides a target value of the DC source voltage Vdc to be outputted by the DC source unit () based on the detection result from the output voltage detection unit ().

High frequency power supply

A high-frequency power device including: an oscillator; a high-frequency power supplier; a reflection coefficient calculator; a discharge signal output unit; and a frequency controller, wherein the frequency controller: instructs the oscillator to oscillate the oscillation signal at a first oscillation frequency for the period of time while a discharge signal is not in a state showing that the discharge has been commenced or in a state where the discharge is regarded as having been commenced; then instructs the oscillator to change the first oscillation frequency to a second oscillation frequency immediately after the discharge signal changes into the states; and then controls the oscillation frequency so that the absolute value is made small.

High-frequency power device and method for controlling high-frequency power

A high-frequency power apparatus including: an oscillator, outputting an oscillating signal, an output level of the oscillating signal being variable; an amplifier, amplifying the oscillating signal output from the oscillator and outputting high-frequency power; a DC power supply, supplying DC power to the amplifier, an output level of the DC power being variable; a high-frequency power measuring unit, measuring a power value of the high-frequency power at an output terminal of the high-frequency power apparatus and outputting the measured power value as a high-frequency power measured value; a DC power measuring unit, measuring a power value of the DC power supplied to the amplifier and outputting the measured DC power value as a DC power measured value; a first controller, controlling the output level of the oscillating signal to be output from the oscillator such that the high-frequency power measured value is substantially equal to an output power set value; and a second controller, controlling the output level of the DC power to be supplied from the DC power supply to the amplifier such that a calculated value obtained by dividing the high-frequency power measured value by the DC power measured value is substantially equal to a predetermined efficiency set value.

High-frequency power apparatus

The invention relates to a HF power supply device including an oscillator () outputting a HF signal, an amplifier () amplifying the output of the oscillator for supplying a HF output to a load, and a DC power supply () to supply a DC power voltage to the amplifier (). The power supply device further includes a loss calculator () calculating a loss in the amplifier (), a first controller () controlling the output of the power supply () and a second controller () controlling the output of the oscillator () or amplifier (). When the calculated loss by the calculator () exceeds a predetermined loss set value, the first controller () lowers the output power voltage of the power supply () to make the calculated loss equal to the loss set value. When the calculated loss is no greater than the loss set value, the first controller () maintains the output power voltage at an appropriate DC voltage set value, while the second controller () controls the output of the oscillator () or amplifier () so that the HF output to the load from the amplifier () approaches a HF output set value.

High-frequency power supply device

A digital AV signal processing apparatus includes a buffer for storing digital data input to the digital AV signal processing apparatus, and outputting the digital data as output digital data, a D/A converter for converting the output digital data to analog data, a voltage-controlled oscillator for generating a clock signal to control a conversion rate of the D/A converter, and a voltage-controlled oscillator controller for detecting a data amount of the digital data stored in the buffer, and controlling a frequency of the clock signal based on a deviation in the detected data amount from a first predetermined value and a time integral of the deviation value.

Digital AV signal processing apparatus

A liquid coating nozzle is provided with a first block which has an inner liquid reserving section that extends in the longitudinal direction and an inner discharge section which includes a plurality of small holes formed in the longitudinal direction at a bottom portion of the liquid reserving section. The nozzle is also provided with a second block which has an inner space defining a gas reserving section that extends in the longitudinal direction outside the first block and an outer discharge section formed in the longitudinal direction at a bottom portion of the inner space. The outer discharge section includes a plurality of small holes and produces a gas flow that externally surrounds a linear or curtain-shaped liquid flow that flows downward from the small holes. This results in the formation of a thin coating film in a short time and reduces the consumption of liquid and coating nonuniformities.

Liquid coating nozzle liquid coating nozzle manufacturing method liquid coating method liquid coating apparatus and cathode ray tube manufacturing method

Liquid application nozzle, method of manufacturing same, liquid

A carbon dioxide gas laser oscillation apparatus having one or more discharge tubes each having a pair of anode and cathode electrodes at least one of which is non-grounded and one or more high voltage DC power sources each connected between the pair of electrodes of each discharge tube provides with one or more conductors each being arranged on each discharge tube in the vicinity of the non-grounded electrode of the pair of electrodes but on one side of the non-grounded electrode opposite to a space between the pair of electrodes. The CO.sub.2 gas laser oscillation apparatus further provides with one or more current detection circuit for detecting a current flowing between zero-potential terminal and ground terminal of the high voltage DC power source, thereby enabling to detect an abnormal discharge within each discharge tube.

Growing community of inventors

Osaka, Japan

Hiroyuki Kotani