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Patent Searching and Data


Matches 501 - 550 out of 1,753

Document Document Title
JP2008104326A
To provide a power supply controller which can cope with a heavy load by achieving an overvoltage protection function through simple circuitry without enlarging a surge absorber.The power supply controller comprises a control circuit 2 f...  
JP4083120B2  
JP4073214B2  
JP2008048576A
To overcome the problem that it is cumbersome to detect an incorrect connection if a plurality of UPSs are connected in parallel.The first and second UPS 6, 10 are provided with first and second UPS incorrect connection detecting circuit...  
JP2008022654A
To normally operate communication equipment for security services, even if a power supply line and a communication line are connected to either of terminals of the equipment.A first switching means 6 and a second switching means 7 are pr...  
JP2008017548A
To provide a drive circuit that makes the protection of a switching element from a surge voltage compatible with the protection of the switching element from a reversely-connected DC power supply.A diode 15 for surge absorption and a zen...  
JP4035230B2  
JP4031133B2  
JP4025580B2  
JP4018077B2  
JP2007312572A
To provide a power supply control circuit capable of suppressing heating of switching elements caused by a surge voltage when the surge voltage is being generated, while enabling the prevention of a breakdown of an internal circuit again...  
JPWO2005039069A1
電源を含む三線で、誤結線保護、長配線、高 速伝送が可能な通信回路を実現する。2本の 交流電源線の一方を共通線とした通信系で、 親局側には、電源の正側から基準となる...  
JP2007529990A
The equipment for protection of an electric line has a processing means, an electric power supply means, an amplitude-measurement means, an alarm means, and a change means to send the current of a track itself [above-mentioned] alternati...  
JP3991603B2  
JP2007259641A
To obtain a failure detector of a refrigerating showcase which can function as a circuit for determining positive and negative phases of a power supply when powering on at the installation of the showcase, can function as a circuit for d...  
JPWO2007110913A
Protect a 昇 pressure switching element etc. in a system interconnection inverter device linked with an exchange electric power system, without using over-current protection elements, such as a fuse, etc., even if it is a case where neg...  
JP3976465B2  
JP3971212B2
To eliminate a problem of processing accuracy (detecting accuracy) being influenced by a deterioration in insulation with time, and enhance certainty and reliability in detection of a break. A signal output portion 2so of a first signal ...  
JP2007082374A
To provide a protection circuit that is the most suitable for protection of electronic control unit (ECU) during reverse connection of a power supply.In ECU45 operating on a power supply of a battery 3, n-channel FET21 is provided on a p...  
JP3897035B2
To solve the problem wherein the replacement of components is required and the costs of components are increased by using components having a high-breakdown voltage in a breaking system utilizing a conventional current fuse and the prote...  
JP3893723B2
To detect the inverse connection of a battery, without affecting the minimum operation assurance voltage of electronic equipment by recharging the voltage, when the electronic equipment is not operating, and using the voltage as a refere...  
JP3890946B2
To provide a safety device for power supply circuit in hybrid vehicle, capable of preventing a connection apparatus and a human body from being damaged and a disaster, such as fire from occurring, if the device is disconnected from the c...  
JP3129412U
[Subject] Voltage which is an electric detection protection instrument installed in an inside of a power supply extension cord, and was loaded on a user at the power supply extension cord, If total value of data of current, electric powe...  
JP2007037302A
To stop power supply to a load before an overvoltage occurs even if an AC power source voltage does not match the conversion ratio of input/output voltages of the DC power source circuit, in a power supply device provided with a DC power...  
JP2007014691A
To protect the internal circuit of a Pachinko machine from overvoltage of a power supply voltage possibly occurring due to erroneous connection to an external power supply irrelevant to the timing of a power application.When applying a p...  
JP2007014180A
To provide a reverse-current preventive means which is secure in operation and lower in electric power consumption.A transistor or a relay is used as a switch, and an instantaneous switch is turned off, then a voltage at a charging side ...  
JP2007014165A
To provide a reverse connection protection device for a vehicle that can achieve power saving, low heat generation and a low-voltage drop by surely protecting electric loads at the reverse connection of a battery by using a latched relay...  
JP2007500496A
The present invention relates to the composition (7) for protecting an electric apparatus. According to the present invention, the above-mentioned equipment is connected to the electrode (3) of a battery (1) by the electrode terminal (4)...  
JP2006352964A
To prevent the influence of voltage drop by a reverse connection preventive diode at normal connection while inhibiting the ON of a relay switch at reverse connection of a power source.A relay coil 5 comprises coils A and B whose winding...  
JP3857948B2
To provide a power source protection circuit capable of stopping the supply of a power to electric equipment when a DC power source is turned not only to an overvoltage but also to a reduced voltage. A first circuit 10 is configured so t...  
JP3853223B2
To subject alternating-current input to voltage control or power control to supply a load with the input with reduced alternating current and further prevent erroneous connection of input terminals and output terminals. A power saving de...  
JP3855159B2
To prevent damage on an apparatus by realizing that power sources of AC100 V and AC200 V are accidentally alternately wired to the same apparatus in an initial construction. An erroneous wiring protector of a bath room dryer fan comprise...  
JP2006230066A
To obtain a reverse current prevention circuit that prevents discharge from a smoothing capacitor to the utmost when an input end is short-circuited in a DC/DC converter, prevents the breakage of a component when the input end is reverse...  
JP3813753B2
To provide a malfunction preventing device for on-vehicle electrical equipment which can prevent malfunctions of on-vehicle electrical equipment due to water infiltration. A starter drive circuit 11 is constituted of a battery 12, fuses ...  
JP2006518980A
[Solution means] The present invention relates to DC motor control circuit. Moreover, the present invention relates to the 風防 glass wiper equipment of vehicles equipped with DC motor control circuit. Series connection of the MOSFET t...  
JP2006518181A
When a motor is electrically first connected to a power supply in the state of being in the position (namely, "ON") which the ON-and-OFF switch which controls a motor closed, it is the method of preventing operation by the sudden careles...  
JP2006174670A
To provide a protective circuit applying no damage on an inner circuit even if an outer source of power supply is connected reversely or a sensor or an actuator is connected erroneously to a terminal.In the constitution of the electronic...  
JP2006115589A
To provide a protection circuit of simple constitution which can protect a circuit without fail even in case that a DC current of reverse polarity is applied, in a power supply circuit.In a power supply circuit which is equipped with a p...  
JP3769986B2
To make preventable an electronic system from a malfunctioning at a low cost by detecting cable misconnection without increasing the number of cores of a cable with connectors nor the number of pins of the connectors by mutually connecti...  
JP2006078323A
To provide a flying capacitor type cell voltage detection apparatus capable of improving reliability by preventing a short-circuit current by a simple circuit constitution which occurs when an input-side sampling switch and an output-sid...  
JP2006081273A
To solve the problem of conventional power supply control through electromagnetic coupling that power supply to a load is not guaranteed and unsafe or unstable operation, e.g. operation with low voltage, may occur possibly because power ...  
JP2006081272A
To solve the problem of conventional power supply control through electromagnetic coupling that power supply to a load is not guaranteed and unsafe or unstable operation, e.g. operation with low voltage, may occur possibly because power ...  
JP3748198B2  
JP2006050788A
To provide a power source protection circuit that is cost-effective and can be miniaturized.The power source protection circuit 10, in which an overvoltage protection circuit 3 is provided between a power input portion 1 and a power outp...  
JP2006042573A
To solve the problem wherein the replacement of components is required and the costs of components are increased by using components having a high-breakdown voltage in a breaking system utilizing a conventional current fuse and the prote...  
JP2006014491A
To provide a power source inputting circuit capable of supplying a stable output voltage Vout, even when the power source voltage is low.The power source inputting circuit is provided with a switch which is formed in the supply channel f...  
JP2005341757A
To provide a device for monitoring electrical path grounding state that can surely detect faults, if the fault occurs that at least one phase of grounding wires is disconnected, in a multiple-phase electrical path grounding means.This el...  
JP2005328665A
To provide a safe and stable DC power supply circuit in which a gate source voltage of an FET does not exceeds the range of an absolute maximum rated voltage when a high voltage is generated at a DC power supply.The DC power supply circu...  
JP2005302433A
To provide a method for detecting easily and reliably the status in which FFC has been connected to a substrate, and to provide an FFC of which the connection status to the substrate can be detected easily and reliably.One surface of an ...  
JP2005304192A
To provide a connector for not generating a reverse voltage and a reverse current when a higher-level controller board and a brushless motor are connected.A GND pin 3 of the female connector 2 on a brushless motor board 1 is longer than ...  

Matches 501 - 550 out of 1,753