Sanyo Electric Co., Ltd.

Tokyo Parts Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Fuji Jukogyo Kabushiki Kaisha

Sanyo Electric Air Conditioning Co., Ltd.

Mamoru Kubo

Hidetoshi Arima

Nobuhiro Idei

Kazuhisa Otagaki

Yasuo Okuda

Kenji Nojima

Masashi Izumi

Akira Hatakeyama

Kazuhiro Shimura

Naohito Sakamoto

Ryuzo Hagihara

Toshio Kubo

Yoshio Tomigashi

Toshiyuki Ebara

Tomohito Koizumi

Toshiya Iwasaki

Keiji Kishimoto

Hiroyuki Uehashi

Kazuo Takahashi

Norioki Fujimoto

Shigeharu Sasaki

Kenzo Watanabe

Masashi Takazawa

Hajime Shimayama

Kiyondo Kobayashi

Hiroyuki Takada

Takashi Odaira

Hisao Honda

Syozo Kato

Koichi Saruhashi

Susumu Takagi

Yasuhiro Oue

Tetsuo Miyamoto

A capacitive proximity sensor of the present invention principally comprises a sensor electrode, a sensor circuit, a detection circuit, and a microcomputer. The sensor circuit has an LC parallel circuit and an LC series resonant circuit. Furthermore, the single sensor electrode is connected in parallel with the LC parallel circuit. By decreasing the drive voltage applied to the sensor electrode, the radiated noise generated by the sensor electrode is also decreased. In addition, foot detection sensitivity can be improved by amplifying the detection signal with the LC series resonant circuit.

Capacitive proximity sensor

A sensor electrode has an upper side portion arranged on an automobile, a lower side portion arranged with a predetermined spacing from the upper side portion, and a connecting portion that connects the upper side portion and the lower side portion. A control unit inputs a signal for detecting a user to the upper side portion, the lower side portion, and the connecting portion, which are electrically connected. The lower side portion is arranged farther from an area through which the user passes than the upper side portion. The installation height of the upper side portion is greater than or equal to the installation height of the lower side portion.

The capacitive proximity sensor includes an oscillation means, an LCR resonance circuit including a sensor electrode, a sensor circuit that outputs a determination voltage signal corresponding to the capacitance of the sensor electrode, and a control unit that detects the proximity of a human body to the sensor electrode based on the determination voltage signal. The control unit performs control that alternatingly and repeatedly executes calibration steps for updating a detection frequency fand a first threshold value Vand a detection step for detecting the proximity of the human body to the sensor electrode.

A capacitive proximity sensorcomprises an oscillation means; a sensor circuit, which includes a sensor electrode; a detection circuit, which outputs a determination voltage signal corresponding to the capacitance of the sensor electrode, based on the electrical signal output from the sensor circuit; and a control unit. The sensor electrodeis connected in parallel to a connection point Pbetween a coil L and a capacitor C in an LCR series resonance circuit. The detection circuitoutputs a determination voltage signal Sbased on the electrical signal at the detection point Pbetween the capacitor C and the resistor R. The control unitdetects the proximity of a human body to the sensor electrode, based on the determination voltage signal S.

Capacitive proximity sensor and human body detection method using capacitive proximity sensor

The resonance frequency of an LCR resonance circuit is fand the determination voltage signal is V, when an object is not in the proximity of a sensor electrode. The resonance frequency of the LCR resonance circuit is fand the determination voltage signal is V, when a human body is in proximity of the sensor electrode. The resonance frequency of the LCR resonance circuit is fand the determination voltage signal is V, when water is in the proximity of the sensor electrode. The LCR resonance circuit has the relationship f&#x3e;f&#x3e;f. A control unit controls a high-frequency signal Sso as to satisfy the relationship V&#x3e;V&#x3e;V, and a human body or water being in the proximity of the sensor electrode is distinguished.

Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor

In a state in which a high-frequency signal at a first detection frequency fis input to an LCR resonance circuit, upon detecting that a voltage signal Sis greater than or equal to an upper-limit threshold value Vor less than or equal to a first lower-limit threshold value V, a high-frequency signal at a second detection frequency fis input to the LCR resonance circuit. Then, in a state in which the high-frequency signal at the second detection frequency fis input, the proximity of a human body or water to a sensor electrodeis detected by detecting that the voltage signal has reached less than or equal to a second lower-limit threshold value V.

In a control device configured to control power to be supplied to a specific load from at least one of a converter that has a power generator and a storage battery, and a commercial power supply, the control device determines whether the commercial power supply is in a power failure state or a power distribution state, in which: when determining that the commercial power supply is in a power distribution state, the control device causes both of the converter and the commercial power supply to be connected to the specific load; and when determining that the commercial power supply has made a transition from a power distribution state to a power failure state, the control device causes the commercial power supply to be disconnected from the specific load while maintaining the connection between the converter and the specific load.

Control device, conversion device, control method, and electricity distribution system

A detection unit determines whether a commercial power supply is in a power failure state or a power distribution state. A power source connection management unit controls whether a solar cell is to be connected to a first power conditioner connected to a storage battery or to be connected to the commercial power supply via a second power conditioner. A load connection controller controls connection of the first power conditioner, commercial power supply, and a load. When the commercial power supply is in a power distribution state, the power source connection management unit does not cause the solar cell to be connected to the first power conditioner but connected to the commercial power supply via the second power conditioner, and the load connection controller causes the first power conditioner and the commercial power supply to be connected to the load.

Control device and power distribution system

This invention offers an battery system that reduces a conversion loss due to a charger to reduce power consumption. The battery system has a solar battery, a battery module, a bypass route to bypass a charger to charge the battery module with DC power generated by the solar battery, and a control unit to control so that the electric power generated by the solar battery is supplied to the battery module through the bypass route when an output voltage of the solar battery is equal to or higher than a first predetermined voltage, that is higher than a terminal voltage of the battery module, and equal to or lower than a second predetermined voltage.

Battery system

A vehicle air conditioning system equipped with a refrigerant circuit comprising an electrically operated compressor is intended to enable simplification of data communication between the inside and outside of a passenger compartment and to enable accurate air conditioning control. In summary, the air conditioning system is equipped with the refrigerant circuit which includes the electrically operated compressor, a gas cooler, an expansion valve, an evaporator and the like that are sequentially pipe-connected in a circular form, in which compression and heat release of a refrigerant are performed by the electrically operated compressor and the gas cooler provided outside a passenger compartment and in which the passenger compartment is cooled by the evaporator provided inside the passenger compartment, and the air conditioning system comprises: an inverter for frequency control of an operation of the electrically operated compressor; and an air conditioning amplifier to which a predetermined operation input is performed and to which information regarding the inside of the passenger compartment is input, wherein the inverter calculates an operating frequency of the electrically operated compressor on the basis of the information from the air conditioning amplifier to operate the electrically operated compressor.

Vehicle air conditioning system

An object is to provide an inverter device for an automobile capable of detecting a ground fault with simple circuitry, and in summary, the inverter device has an inverter (inverter module) which generates an AC output from a battery loaded on a vehicle body to drive a motor, and the inverter device comprises a ground fault detection circuit connected between a negative line of the battery and the vehicle body, and a controller, wherein the ground fault detection circuit includes a serial circuit of a resistor element and a condenser element or a serial circuit of a plurality of resistor elements, and a potential at a connection point of the elements is input to the controller to detect a ground fault.

Inverter device for automobile

An object is to provide a driving device capable of smoothly shifting from a starting state to a sensor-less vector control, in a case where the device drives a motor by the sensor-less vector control, and the device includes a voltage detecting circuit which detects an induced electromotive voltage of the motor. A control circuit starts the motor by rectangular wave control. A magnetic pole position of a rotor is detected based on an induced electromotive voltage of one remaining phase of the motor detected by the voltage detecting circuit. The control circuit controls a main inverter circuit based on the detected magnetic pole position, and accelerates the motor by the rectangular wave control. In a case where a predetermined shift revolution speed is reached, the control circuit shifts to vector control by the sensor-less in which the magnetic pole position detected during the rectangular wave control is used as an initial value.

Driving device of motor

An object is to provide an inverter device capable of realizing exact protection of the winding of a motor. An inverter device for generating a pseudo alternating current by switching a direct current to drive a motor, comprises a controller that executes vector control on the basis of a secondary current applied to the motor. The controller calculates a current density from the secondary current to execute a predetermined protection operation on the basis of the calculated current density. The controller imposes a restriction on the operation frequency of the motor on the basis of the current density.

Inverter device

For a purpose of realizing a refrigerant cycle apparatus capable of exactly detecting a pressure reverse phenomenon caused in a compression element of a compressor of a multistage compression type, in the refrigerant cycle apparatus in which the multistage compression type compressor constitutes a refrigerant circuit, including an electromotive element, and first and second compression elements driven by the electromotive element in an airtight container to suck an intermediate-pressure refrigerant gas compressed by the first compression element into the second compression element and to compress and discharge the refrigerant gas, the apparatus comprising: a sensor for detecting a discharge refrigerant pressure of the first compression element; and a control device into which an output of the sensor is input, the control device detects reverse of the discharge refrigerant pressures of the first and second compression elements based on the discharge refrigerant pressure of the first compression element.

Refrigerant cycle apparatus

There is provided an automotive air conditioning system, which is free from troubles in traveling itself caused by power consumption in air conditioning means in an automobile having storage means, power generation means for charging the storage means, and air conditioning means having an electric compressor driven by feeding from the storage means. Control means calculates a permissible power consumption increment in the air conditioning means by adding a permissible power generation increment to a permissible discharging current increment on tha basis of the permissible power generation increment allowable in the power generation means and the permissible discharging current increment allowable in the storage means to increase power consumption of the air conditioning means within the range of the permissible power consumption increment and to increase power generation of the power generation means within the range of the permissible power generation increment according to an increment of power consumption of the air conditioning means.

Growing community of inventors

Gunma, Japan

Mamoru Kubo