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JP2009171778A |
To provide a power supply device of high reliability.The power supply device includes a pressure-sensitive means 4 comprising a piezoelectric sensor for sensing vibration and pressure fluctuation, a determination means 6 which senses an ...
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JP2009171754A |
To provide an overheating protection circuit whose mounting area and manufacturing costs are reduced.A plurality of components 21, 24 are protected from overheating by one overheating protection circuit not by a plurality of overheating ...
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JP2009165285A |
To reduce connection between a control-circuit chip and a main-device chip by highly-sensitively detecting an overcurrent and overheating of a main device in a semiconductor device provided with both of an overcurrent protection function...
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JP2009159800A |
To provide an abnormality protecting apparatus which has low current consumption and a small area, monitors an abnormal temperature state and a low voltage state, and generates an abnormality protecting signal.An abnormality protecting c...
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JP4294755B2 |
The electric hand tool includes a protection electrode (1) contained within the tool housing enclosing the electric drive motor. A fault current protection switch (2a,2b,2c) is provided, which operates at a given sum fault current level,...
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JP2009153237A |
To reduce restrictions on wiring layout when a circuit for sensing the inflow of a current is provided on a substrate.On the surface of an insulated substrate 30, there are a wiring pattern area 30a where a copper foil 32 is formed and n...
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JP4287543B2 |
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JP4278622B2 |
A power supply apparatus has a battery and a temperature detection circuit. The battery has n battery cells, and the temperature detection circuit has m temperature detection units. Each temperature detection units has a temperature sens...
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JP2009120138A |
To provide a highly reliable power shutdown control system certainly preventing an over-current from continuously flowing.A power shutdown control controller 7 drives a current sensor 2 monitoring the current value of a current led to fl...
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JPWO2007072593A1 |
One side is connected to the grid power line A, the other side is connected to the electrical equipment (100), and the connector (10) that energizes or cuts off the power supplied from the grid power line A to the electrical equipment (1...
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JP2009055754A |
To provide a protection circuit capable of reducing the size and cost of a semiconductor switch by sufficiently using the performance of the semiconductor switch.A CPU 33A changes a threshold value so that the threshold value decreases a...
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JP4237654B2 |
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JP4227876B2 |
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JP3147959U |
To provide a thermostat device for controlling electric power supplied to an external device according to the temperature of the external device detected by a temperature sensor. In a thermostat device 1 that detects the temperature of a...
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JP4212970B2 |
A safety relay system includes one or more additional input units (6A,6B) each for sending safety input from a safety component (1), a master unit (5) for receiving the safety input from the additional input unit and providing safety out...
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JP4212807B2 |
The signal processing device comprises determining means to supply an output signal having a value representative of a time constant of a part of an input signal having an appreciably exponential form. The determining means comprise firs...
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JP4207685B2 |
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JP2009005559A |
To provide a battery pack for carrying out temperature protection of a secondary battery with high accuracy, only when a charger is connected, and for preventing self-heating at electric discharges.The battery pack includes a protective ...
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JP2008312434A |
To provide a coil device which can suppress current flowing through a coil in an abnormal situation by a novel method recognizing a difference in amounts of magnetic flux crossing magnetic materials in the abnormal situation, and a power...
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JP2008295156A |
To provide a highly safe power receiver and an electronic apparatus in which a large current is not caused to flow into a load-modulating resistor at the time of abnormality while reducing the size of the load-modulating resistor of a lo...
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JP2008289255A |
To provide a monitoring apparatus that uses a small coil as power supply and detects a busbar temperature through simple circuitry.The monitoring apparatus includes: a sensor RF unit 3 that detects the temperature of a busbar and transmi...
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JP2008289297A |
To provide a protection device for load circuits that surely shuts off a load circuit when a chattering short circuit or a layer short circuit occurs by detecting a wire temperature rise.When a current flowing into a load 4 is increasing...
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JP4178904B2 |
In a temperature protection device for power devices of the present invention, detected temperatures of power devices are compared with respective threshold values by determination units. If either one of the determination units determin...
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JP2008259379A |
To provide a temperature-sensitive sensor that is excellent in temperature sensitivity by utilizing an ionic liquid.A non-return type temperature-sensitive sensor is composed so that an electrolyte being solid at a normal temperature is ...
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JP4170232B2 |
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JP2008253067A |
To provide a mobile terminal capable of preventing heat generation in a power amplifier, thereby ensuring the quality of transmission information output information.A computer 3 powered from a battery 2 outputs output information Dout. T...
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JP4148604B2 |
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JP4149440B2 |
The protective circuit for analog sensors has transistors respectively located in a power supply voltage line and in a ground line. The control electrode of said circuit is located between the supply voltage and the ground via a voltage ...
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JP2008206364A |
To solve a problem that a conventional power supply supervises an operating state of an inrush preventive circuit only indirectly, and an abnormality caused at malfunction in a relay contact is not detected, even if an auxiliary contact ...
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JP2008206245A |
To quickly perform power block at the primary side of a power supply even if there occurs any abnormality such as a power supply earth fault.An abnormality detection circuit 27 is constituted in such a manner that a reference resistor 31...
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JP2008178160A |
To provide a safety measure system of a plug receptacle which can detect, for example, an overcurrent at the time of electricity application in the plug receptacle, a rise in circumferential temperature, and the occurrence of an abnormal...
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JP2008172987A |
To more quickly stop the operation of an electrical device and a gas appliance, when an earthquake occurs.A power supply interruption device is provided with a receiving means 60 receiving a P-wave broadcast radio wave signal when earthq...
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JP4119491B2 |
An overcurrent protection system containing (1) a current sensing means; (2) a first switch coupled to the current sensing means; (3) a voltage sensing means; (4) a PTC device; and (5) a second switch coupled to the voltage sensing means...
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JP2008154305A |
To provide a protective mechanism of a cable, capable of protecting a cable by controlling the temperature of the cable.The protective mechanism of a cable includes a cable 30A1 coated for insulation and to be connected to a driving devi...
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JP2008131803A |
To avoid the casing temperature of a portable terminal device from becoming abnormally high, by preventing the temperature of a thermal diffusion sheet from becoming higher in temperature than is necessary, when diffusing the heat genera...
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JP2008131745A |
To reduce the influence of earthquake to electronic equipment.This electronic equipment (10), which is connected to a computer program that is equipped with a means (11) for receiving earthquake information from outside and a means (12) ...
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JP4096131B2 |
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JP4093678B2 |
In a motor control unit adapted to control each switching element of each switching arm and control the current sent to a motor, the temperature sensing diodes 19a~19c are arranged near the switching elements and a constant current circu...
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JP2008113505A |
To provide a temperature control system for battery, which can sense abnormal temperature rise of a battery for an electric vehicle and be provided at low cost.The temperature control system of a battery comprises temperature fuses 3 tha...
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JP2008109779A |
To provide a device for preventing overcurrent capable of stopping a power supply circuit, without causing firing or smoking at half short-circuiting.A first thermistor 21 measures the temperature produced from a rectifier circuit 15 and...
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JP4079871B2 |
A battery pack that determines battery temperature via a protection circuit which detects electrical resistance change in a temperature sensor thermally joined with the rechargeable batteries. The protection circuit is provided with a ti...
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JP2008512071A |
The present invention relates to a circuit device (01, 15, 21) for protecting a conductor (02), especially a flat conductor, from overload in an automobile, in which the circuit device sets a temperature or a value that correlates with t...
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JP2008092625A |
To provide an electrical apparatus wherein a direct-current power supply unit and a main unit are separated from each other and alternating-current voltage supply and direct-current voltage supply can be isolated from each other without ...
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JP4076892B2 |
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JP2008510448A |
When a leakage voltage exceeding the set voltage occurs in an electrical structure such as a traffic signal light or a street light installed on a road, or when inundation occurs, the AC power supply is cut off to prevent an accident fro...
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JP2008043004A |
To provide a power supply device which can properly suppress a rush current at powering-on and heat generation at normal operation without the need for any control, and to provide an air cleaner using the power supply device.The power su...
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JP2007298412A |
To provide a watt-hour meter capable of stopping power supply to a load-side distribution line, and enabling a current to flow, after it has been confirmed that there is no load-side distribution line short-circuiting, when earthquake oc...
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JP4002546B2 |
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JP3992017B2 |
An electric power generating system for a vehicle includes a generator having a field coil, a voltage regulator, a temperature sensor for sensing temperature of the voltage regulator, a field current restricting circuit that directly res...
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JP3990218B2 |
A protection apparatus for a semiconductor device includes a DC power source, a load, a semiconductor device arranged between the DC power source and the load and switches the load between a driving state and a stopping state, a comparat...
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