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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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 ...
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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...
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JP3615170B2 |
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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 ...
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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 ...
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JP3601844B2 |
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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 ...
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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...
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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...
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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...
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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...
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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 ...
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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...
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JP3572112B2 |
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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...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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. ...
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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 ...
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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 ...
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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...
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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...
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