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Patent Searching and Data


Matches 551 - 600 out of 1,495

Document Document Title
JP3696384B2
To prevent current leakage from the driving side to the stopping side by juxtaposing two sets of bridge circuits between a power supply and a motor and rotary driving the motor through any one bridge circuit to close one of two switches ...  
JP3687451B2
To provide a load driver that can shut off a current, when a battery is connected in reverse, using a simple configuration. The source of a power MOS transistor(TR) 320 is connected to a terminal 303, that is connected to ground via a po...  
JP2005224088A
To provide a load protection circuit that is adapted to protect negative-polarity voltage from being applied on loads that operates on a direct-current, and to minimize a loss when a voltage is being supplied at a normal polarity.A semic...  
JP3685212B2
PURPOSE: To provide a high-voltage power source which can prevent the output of a high voltage when a high-voltage outputting connector is not connected to such equipment as the secondary electron multiplier, etc., by surely detecting di...  
JP2005210823A
To provide a power converter for an AC module that can prevent the occurrence of a spark when a plug is pulled out from a wall socket that is connected to a commercial AC system.When DC power connected to a solar cell and inputted from i...  
JP3669426B2
To prevent misoperations of electronics and giving damages to a circuit element, caused by improper connection of a connector used in the electronics. A connector, having groups of power feed paths corresponding to each of electronic boa...  
JP3662431B2
To provide a control circuit capable of reducing a volume dedicated to parts. This control circuit is provided with a drive signal output unit 5b for outputting at least one command signal for controlling the drive of equipment 8a, 8b to...  
JP2005134283A
To provide a current output sensor of a two-wire system capable of replacing two external connection terminals optionally with a power source terminal and a GND terminal.This current output sensor of the two-wire system is provided with ...  
JP3652508B2
To protect the circuit components inside a drive by applying the level of a second power source to the inner circuit which is extremely much lower than the level of the first power source, using the first power source applied to the inpu...  
JP2005117878A
To solve the problem wherein no function of preventing the short-circuit between a positive terminal and a negative terminal (called the ground) is provided for an electrical apparatus that requires a DC current in a general electrical a...  
JP2005110389A
To provide a charger which enables a user to connect cables, without taking the polarity of battery terminals into consideration.The charger 1 is provided with a relay circuit 10 which becomes any of the first continuity state where the ...  
JP2005086971A
To provide an automatic power supply connector, wherein if an electrical apparatus supplied with power through a power line is connected or disconnected, the power line can be turned on/off in conjunction with the connecting or disconnec...  
JP2005057856A
To obtain a motor which prevents a motor winding from burning due to incorrect wire connection, etc. by noting that positive temperature coefficient thermistor has low cost and small size and an impedance is increased by self-heating.The...  
JP2005052391A
To prevent an accident caused by the wrong connection of a power supply cable of a motor for driving a water spray gun.The device has a first switch for feeding electric power to the motor for swinging the water spray gun to the right ti...  
JP3625901B2
According to the present invention, in a first acceleration after power is turned ON, currents flowing through U-phase and V-phase of a servo motor output terminal are detected, and misconnection of the motor output terminal is detected ...  
JP2005051919A
To provide a power supply which can be protected when the voltage of a DC power supply increases excessively or the DC power supply is connected with reverse polarity and can reduce the cost by decreasing the number of circuit components...  
JP3615170B2  
JP3608483B2
To provide a protective device of a polar capacitor, which can suppress properly a surge generated in a load operation state and protect surely the polar capacitor, when a DC power supply is connected with reverse polarity. A mechanical ...  
JP3601255B2
To detect short circuit of the load circuit of an inverter at the time of start-up. An interval for turning the semiconductor switch 11 in the upper arm and the semiconductor switches 15, 16 in the lower arm, an interval for turning the ...  
JP3601844B2  
JP3597147B2
To solve such a problem that, with respect to equipment which adopts redundant configuration, or two systems, for example 0-system and 1-system for primary power input, if one system is connected normal and the other system is connected ...  
JP2004328904A
To provide a voltage abnormality detecting device in which an AC power of an overvoltage is not inputted to a power board even if the AC power of an overvoltage is inputted to a power input part, and which can surely prevent the breakage...  
JP2004320836A
To prevent a malfunction due to a wrong connection by stopping supply of a power source if the wrong connection of a cable is made.A transmission side unit 10 comprises an oscillation part 14A which outputs a frequency fa when input term...  
JP3585016B2
To suppress the generation of high voltage by saturating the saturable transformer of a disconnected load before continuing a phase controller by the operation of the leakage inductance of an output transformer. A constant current contro...  
JP2004312996A
To provide a protective device against polarity reversal which overcomes a disadvantage of a well-known device.The device protecting a circuit against polarity reversal of a connection part to a DC power supply device includes a controll...  
JP2004297928A
To provide a connector device capable of assuring the safety of an information processing device which is different from a video apparatus, corresponding to a currently preset connection mode.A series circuit, consisting of a resistor 3 ...  
JP2004279053A
To provide a flow meter capable of preventing failure caused by cloud-to-ground discharge and normally and continuously operating.A ground potential E is measured. The presence or absence of the approach of thunder is determined on the b...  
JP3572112B2  
JP3570338B2
To provide a simplified and low-cost protection circuit for inverse connection of a power supply, which does not lower the power supply voltage for the connection of power supply. In an IC 11 of the SOI structure, a constant current circ...  
JP3559524B2
The invention relates to a protective circuit for electronic modules, especially driver modules, for protecting against polarity reversal and against rupturing of the neutral conductor. A first protective diode (D1) is arranged, with the...  
JP2004229414A
To provide a power supply protective device wherein excess voltage is not transmitted to a loading side for a moment, even if the excess voltage exceeding rating is applied, and does not exert influence on the loading side at all, regard...  
JP3550781B2
PURPOSE: To provide a protective device which prevents a trouble such as the generation of a spark, damage by a fire or the like when an erroneous cable or an erroneous board is connected to a parallel connector and which can be returned...  
JP3545721B2
To reduce the number of components of a protection device arranged between a DC power source and a load circuit for protecting a problem which may be generated at the time of inverse connection. A protection device 10 is provided with a ...  
JP3542313B2
To provide a drive method of a semiconductor switching element for preventing large reverse current even during the start or the failure of a converter and suppressing the voltage change on the load. A first control signal corresponding ...  
JP2004153988A
To provide a stopping type exciting system that prevents a shaft vibrating phenomenon of a generator that occurs in the stopping type exciting system having a high gain and an overcurrent phenomenon that occurs in a system having unilate...  
JP2004153906A
To assure the prevention of a circuit element from being broken when there is wrong reverse connection by significantly improving the driving performance of a driver, and attain miniaturization and cost reduction.This preventing device c...  
JP3520291B2
To provide an electric load control circuit for vehicle, which drives a field effect transistor for driving a coil by pulse width modulation(PWM) control and which is able to protect a load, when a power supply is reversely connected and...  
JP2004104879A
To provide an abnormality detection device for a power apparatus capable of preventing the power apparatus from being burnt by a defective contact in a connector even when the current consumption of a load in the power apparatus is high....  
JP3511266B2
To provide an apparatus such as a copying machine, etc., having a service outlet which can take out a prescribed required voltage and be stopped to avoid an accident, even if it is used in an area where a power supply voltage is signific...  
JP3512188B2
PCT No. PCT/DE95/00296 Sec. 371 Date Feb. 5, 1997 Sec. 102(e) Date Feb. 5, 1997 PCT Filed Feb. 22, 1995 PCT Pub. No. WO95/24725 PCT Pub. Date Sep. 14, 1995A device for monitoring the safety operation of power switches, in particular vacu...  
JP3506489B2
PURPOSE: To provide a protection circuit which protects an internal circuit in an integrated circuit against a reverse battery connection. CONSTITUTION: This protection circuit 10 includes a path transistor 14 which turns on, when a sour...  
JP2004507994A
A protective relay is provided to protect circuitry against reverse battery polarity or load dump, wherein a relay coil is operatively connected to a contact switch and is fed by a reverse bias diode (which may be a Zener diode) such tha...  
JP3496956B2
PURPOSE: To provide a device and method in which only a load which is necessary to be re-activated can be automatically reactivated in the shortest time. CONSTITUTION: This device is provided with a central control unit 3 connected throu...  
JP2004040914A
To provide a charger excellent in safety by preventing the erroneous mounting of a battery, and a charging method.A charge control circuit 30 gets a voltage value V23 measured by a voltage measuring circuit 20 and performs switching betw...  
JP3488655B2
To improve reliability by constituting multiple choice output propriety decision depending upon the decision of an operator of a logical circuit and eliminating a mistake on the decision of the operator. The multiple choice output inhibi...  
JP2003346758A
To provide a power supply circuit that does not require a direction of the battery so that an accident such as a trouble or failure, leakage of liquid, or burst of the equipment may not happen when the direction of the battery is wrong. ...  
JP2003339117A
To prevent an electronic device from breaking down, even if a battery is inserted in reverse into the electronic device.This breakdown preventing circuit (30) for an electronic device includes a cut-off circuit for cutting off a current ...  
JP3455576B2
PURPOSE: To obtain a current-feeding circuit that is suited for the throwing connection of a load with a capacitive load component, by operating a closing connection current one-limiting circuit depending on a voltage difference between ...  
JP2003264933A
To provide an input protection circuit capable of protecting an electrical apparatus which operates on direct-current power without fail even if the electrical apparatus is used to meet recent needs.The protection circuit 1 is for protec...  
JP2003527808A
A safety lock out switch system for the prevention of an unexpected restart of an electrically powered machine in whose main power circuit it is installed. Therein the power-free status of the power supply output of the system is confirm...  

Matches 551 - 600 out of 1,495