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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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JP3447161B2 |
To surely perform grounding of a stabilized power circuit, while preventing an overcurrent due to a short-circuit accident to a motor driver provided in an air conditioner for a vehicle. A ground terminal 4a of a motor driver 4 controlli...
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JP3426342B2 |
PURPOSE: To protect a drive system circuit, a welding head and an article to be welded. CONSTITUTION: When a line 30a or 30b is disconnected, an OR circuit 24 outputs a signal FB. When the lines 30a, 30b are connected reversely and an ou...
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JP2003520933A |
The device has at least one power switch in a power supply path, a central control part and at least one non-central control element in the hazard region and connected via cable to the central control part. The non-central control elemen...
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JP2003189467A |
To make it unnecessary to replace a protective device (fuse) every time when an erroneous wiring 6 is produced.This I/O circuit has a transistor, a drive circuit generating the base signal of the transistor, and a protective device prote...
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JP2003185693A |
To provide a phase discrimination apparatus for a distribution line which is easy to handle, whose structure is simple and low-cost and which can be applied to the discrimination of not only the phase of the distribution line such as an ...
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JP2003165399A |
To prevent an arc discharge and an electrical shock from occurring when a connector connection part is handled.This power cutout system for vehicle comprises a power cutout means 13 having a power cutout part 15 installed in a vehicle el...
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JP3411072B2 |
PURPOSE: To protect a DC power supply device from an overvoltage by detecting the overvoltage when a positive output terminal short-circuits to a negative output terminal and a negative output is clamped to the positive side. CONSTITUTIO...
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JP2003516704A |
The invention relates to a method for safely coupling an external voltage network to a service voltage network. The aim of the invention is to prevent damages caused by inadmissibly high currents or different voltages when two networks a...
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JP2003111271A |
To prevent an injury from being produced when an overrating voltage is fed to power terminals of an electronic apparatus.A protective circuit 6 is configured so as to comprise a PT thermistor 10 connected in series to the power terminals...
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JP3387631B2 |
PURPOSE: To prevent it from being damaged by a reversely connected battery biasing a MOSFET into nonconductive condition, when the battery is reverse connected. CONSTITUTION: When a battery 11 is connected normal, a MOSFET 1 is turned of...
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JP3384834B2 |
A circuit (2) comprising a comparator (15) supplied with a turn-on voltage (VST) increasing gradually during the turn-on phase of a device (1) for protection. When the control voltage reaches a predetermined value (V1), the comparator (1...
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JP2003061244A |
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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JP2003047287A |
To provide a protective circuit which can prevent an overcurrent from flowing to a transistor in case that circuit structure is connected the other way for its plus and minus to a power source, while contriving a countermeasure to the su...
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JP3376775B2 |
To provide a hybrid vehicle avoiding the control infeasibility of a generator due to the abnormal rotation of a driving wheel. An engine 11, a generator 16, and a drive output shaft are connected via a planetary gear unit, and the rotati...
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JP2003037933A |
To protect a circuit when a power supply is reversely connected in polarity and achieve a structure durable against noise. A P channel FET 3 for protecting the circuit when the power supply is reversely connected in polarity, is provided...
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JP3367254B2 |
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JP3365195B2 |
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JP2002369377A |
To provide an electronic apparatus that restrains an overcurrent caused by the wrong wiring of a power supply from affecting other electronic apparatus through signal ground lines. This apparatus is characterized by having a terminal for...
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JP2002359920A |
To provide a protective device which can protect a system, supplying a power and electric signals to external devices, not only from a 0-Ω grounding but also from ohmic short circuiting. This protective device for a power supply system ...
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JP3349984B2 |
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JP2002335626A |
To apply the necessary voltage to a device power supply circuit by reducing a voltage drop in a backward current preventing circuit connected between a battery and the device power supply circuit.The drain of a MOSFET 3 is connected to a...
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JP2002324637A |
To provide an adapter that enables to connect a power supply plug of DC electric apparatus into the existing receptacle and prevents a reversed polarity voltage from being applied.The housing 11 of a conversion adapter 10 is equipped wit...
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JP3338770B2 |
To prevent malfunction when the output voltage of a switching power circuit is increased and thereby enhance the reliability of a system, by inhibiting short circuit protecting operation during a period from time when power is supplied t...
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JP2002315186A |
To provide a method for surely detecting the connection of equipment such as a sensor and an actuator to a different connection in a control apparatus.First in a step S11, a counter is reset. Then in a step S12, the ID code number of equ...
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JP2002281663A |
To improve the yield of a product and manufacturing efficiency by preventing damage of the product, when an abnormal voltage is applied to a power source of the product.A power supply stopping apparatus is provided with a variable voltag...
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JP2002271973A |
To eliminate influence on the ground protection function with a flashing device.An operation power supply power can be obtained by connecting both ends of a primary coil 12 of a transformer between AC power feeding terminals 14, 15 via a...
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JP3326255B2 |
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JP3324056B2 |
To make it possible to detect the generation of a DC short-circuit phenomenon across both ends of one smoothing capacitor on the basis of a computed value by a method wherein voltages across both ends of respective smoothing capacitors a...
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JP3325927B2 |
A control arrangement for electrical motors and motor vehicles includes measures which fulfill the requirements with respect to short circuits, protection against polarity reversal, load-dump protection, blocking against defective operat...
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JP2002528938A |
(57) [Summary] The present invention is a mispolarization protection circuit for a power output stage having at least one high-side semiconductor switch, wherein the high-side semiconductor switch requires a control voltage greater than ...
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JP2002247755A |
To provide higher safety than that of a conventional art by preventing the occurrence of a short circuit between positive and negative electrodes of a power supply, even when the respective terminal electrodes on the power supply side an...
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JP2002528022A |
A battery protection circuit for an external battery pack has a switch for controlling connection of a battery output to a load and a detector for detecting a resistance at a load output terminal. A first comparator compares the detected...
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JP3319302B2 |
To prevent an electrolytic capacitor, which stabilizes an electric potential, from being deteriorated or broken due to application of reverse bias by connecting a protective circuit which short-circuits both positive and negative termina...
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JP2002525018A |
A polarity reversal protective circuit for an electronic power output stage that can be driven via a drive circuit is described. In the case of an incorrect polarization of a supply voltage, power FETs are used in at least one supply ter...
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JP2002218645A |
To provide a protective circuit for a power source circuit, through which devices can be protected, and a removable disk device employing the protective circuit for the power source circuit, concerning power source protection circuits an...
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JP2002203442A |
To provide electronic equipment not conducting control operation to a signal from an operation button if the operation button kept in a pressed state is present when electric power is supplied.This electronic equipment judges whether vol...
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JP3302237B2 |
To secure the safety of the electrical equipment system of an agriculture working machine, making the consumption of its battery and the malfunction of its electrical equipment system, etc., removable completely, by previously preventing...
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JP3301472B2 |
To prevent the occurrence of a rush current when power supply is turned on with a simple circuit configuration. An FET is connected between a power source circuit 1 and a circuit 9 to be supplied with electric power having a smoothing ca...
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JP2002186175A |
To provide a parallel operation power supply, which assures a highly safe operation by automatically and physically separating a fault of a power supply module when it is generated, because such a fault in the power supply module has the...
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JP2002516554A |
A battery protection circuit for an external battery pack has a switch for controlling connection of a battery output to a load, and a detector for detecting a resistance at a load output terminal. A first comparator compares the detecte...
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JP2002159136A |
To avoid a failure of a circuit even if a common ground line is open- circuited and a high voltage is applied to the common ground line by a short circuit, etc.A load circuit 21 (including various types of actuators and their drive circu...
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JP2002136154A |
To prevent a capacitor and a bus panel from being connected with each other with the polarity thereof inverted, when the capacitor is installed on the bus panel.The capacitor 33 includes a positive-pole terminal 41 and a negative-pole te...
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JP2002512498A |
The polarity reversal protection circuit provides for a semiconductor switch (11) to be connected in parallel with the polarity reversal protection diode (10), which switch is switched off in the event of polarity reversal and is switche...
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JP3276996B2 |
PURPOSE: To obtain a malfunction preventing circuit adaptable to an electronic circuit configured as an integrated circuit which requires a plurality of grounding points and obtain a protection circuit suitable to an electronic circuit w...
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JP2002118958A |
To provide a protector against reverse connection of a power supply preventing a relay contact point from being damaged, even if a load is a capacitive load.This protector against reverse connection of a power supply protecting the load ...
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