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7600140 |
Logic circuit system and method of changing operating voltage of a programmable logic circuit
A logic circuit system with power consumption that is reduced by automatically varying the clock frequency and operating voltage according to processing capability imposed on programmable logic...
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7411771 |
Electric circuit arrangement for controlling a solenoid-operated fluid valve
An electric circuit arrangement for controlling a solenoid-operated fluid valve.
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7397148 |
Vehicular anomaly diagnosis system
An engine start is beforehand detected when a preparation operation to engine start is detected. When the preparation operation is detected based on a seat switch indicating that a driver seats...
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7273038 |
Fuel injection control method and fuel-injection control device
In order to perform accurate fuel injection control in response to fuel injection requests from the engine side without being affected by variations in power supply voltage and in coil temperature...
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7248453 |
Circuit and method for controlling current flow through a solenoid
A solenoid control circuit that includes two switching networks that are selectively opened and closed in a current limit cycle to control the magnitude of the current flowing through the solenoid....
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7196891 |
Control circuit for frequency converter
A control circuit for a frequency converter is provided. The control circuit includes a switch circuit, a timer switch, a starter circuit, a starter relay, and a timer relay. The control circuit is...
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7184254 |
Apparatus and method for controlling the maximum stroke for linear compressors
An apparatus and method for controlling the maximum stroke of a linear compressor is provided. The shorting of the normal supply voltage of a compressor to ground is used to detect overstroking. A...
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7168413 |
Fuel injector control apparatus for cylinder injection type internal combustion engine
A fuel injector control apparatus for a cylinder injection type engine includes driving circuits each shared by plural fuel injectors classified groupwise and having one ends connected in common to...
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7116541 |
Method and apparatus for reducing the switching noise of an electromagnetic switching device
In order to achieve a reduction in the switching noise during operation of an electromagnetic switching device with little complexity, a coil for moving an armature with moving switching contacts...
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7116538 |
Modular overload relay system
A modular overload relay provides a low cost analog base unit performing overload detection functions and one or more add-on units communicating with the base unit through an electric conductor on...
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7106564 |
Devices and methods for detecting islanding operation of a static power source
Devices and methods for detecting islanding operation of a static power source involve injection of a non-harmonic error on the phase angle of the static power source in regular steps to introduce...
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6985345 |
Method and a device for operating an electro-magnet on an intrinsically safe direct current circuit
The present invention relates to a method for operation of an electro-magnet ( 2, 3 ) connected to an intrinsically safe direct current circuit which can be switched under control between two...
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6978978 |
PWM voltage clamp for driver circuit of an electric fluid dispensing gun and method
An electric fluid dispenser for dispensing a fluid onto a substrate. A power switching circuit is connected to an unregulated power supply providing a varying voltage. A solenoid connected to the...
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6934141 |
Power supply device preventing inrush current
A power supply device 3 including: a current source 31 for supplying current to a load circuit 4 which operates on the supplied current, and a power switch unit 32 between the current...
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6934140 |
Frequency-controlled load driver for an electromechanical system
A frequency-controlled load driver circuit includes a steady-state and a transient operational mode. A switching driver switches a load current to a solenoid at a set switching frequency during a...
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6917506 |
Control apparatus for master/slave outlets
A control apparatus for master/slave outlets having a current sensor, a driver, a large current switch component and a direct-bucking type power supply such that the working power source required...
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6853532 |
Apparatus and method for driving actuator
The present invention relates to an actuator drive apparatus capable of eliminating the influence of the mutual induction effect of a drive coil and a detection coil with a simple structure. That...
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6845300 |
Control methods for electromagnetic valve actuators
An electromagnetically operated valve assembly ( 28 ) has a first solenoid ( 58 ) and a second solenoid ( 60 ). An armature ( 56 ) having a valve stem ( 54 ) coupled thereto is positioned between...
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6788017 |
Period adjustment circuit of disconnection and restart IC
A period adjustment circuit of disconnection and restart IC comprises a second capacitor, which is connected to a resistor and a transistor connected in parallel. One end of the resistor is...
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6744615 |
Device for controlling an electromechanical regulator
A device for controlling an electromechanical regulator, including a controller ( 3 a ) that controls the current through a coil ( 113 ) and which, for that purpose, generates control signals for a...
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6741443 |
Method of providing reliable switching for DSL relay array
A known method of addressing relays in an array is to provide two windings on each relay, wherein one winding is associated with a row drive signal and one winding is associated with a column drive...
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6741441 |
Electromagnetic actuator system and method for engine valves
An apparatus and a method for electromagnetically actuating engine valves to obtain soft seating. The magnitude and duration of current pulses applied to the armature attracting coils are...
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6714398 |
Bulk degausser with fixed arrays of magnetic poles configured for thick and small form factor, high coercivity media
A bulk degaussing apparatus and method for erasing magnetic media of various sizes. A media passage track is provided such that media passing therethrough is uniformly exposed to the magnetic...
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6697243 |
Under voltage release with an electromagnet and clocked holding current circuit
In order to provide as short a switching delay as possible in an undervoltage release which contains an electromagnet for tripping a switching device, and a driver circuit feeding the winding of...
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6693787 |
Control algorithm for soft-landing in electromechanical actuators
A system ( 12 ) and method for controlling an armature ( 20 ) of an electromagnetic actuator ( 10 ) are provided. The system ( 12 ) includes a circuit ( 46 ) for providing current to the coils (...
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6606233 |
Method and apparatus for immunizing a contactor circuit from the adverse effects of a derived power supply
A method and device for immunizing a contactor circuit from the inductive effects of a holding coil derived power supply, including: sensing a voltage signal from a power supply, the voltage...
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6563685 |
Thermal protection relay
The thermal protection relay determines a value representative of the thermal image of an apparatus to be protected according to a measured current value, to a previous value of the thermal image...
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6518764 |
Relay driving apparatus
A relay driving apparatus to be automatically restores a relay driving state if the relay is inadvertently turned off. The relay driving apparatus supplies a predetermined rated voltage to the...
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6498468 |
Circuit arrangement for the supply of an electrical coil with a predetermined operating current
In a circuit arrangement for the supply of an electrical coil (L), particularly the coil of a solenoid valve, with a predetermined operating current from a voltage source with differing operating...
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6493204 |
Modulated voltage for a solenoid valve
A circuit for actuating an ABS solenoid valve coil with a pulse width modulated voltage having a constant frequency and variable duty cycle. The coil current is a function of the duty cycle of the...
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6404612 |
Method for system for driving a solenoid
A system and method for a pulse width modulated (PWM) solenoid driver with a reduced rate of power consumption. The system for driving a solenoid includes a solenoid, a current set-point for...
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6364281 |
Method of energizing solenoid operated valves
A solenoid operated valve is controlled upon increasing energization for greater flow by incrementing by a small fraction of the maximum current a target current level for the desired flow for a...
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6327130 |
Control device of a circuit breaker opening or closing electromagnet with local and remote control
The device comprises two power supply terminals, a local control terminal and remote control and presence detection terminals. It can operate in fully autonomous manner, the power supply terminals...
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6310754 |
Control accuracy of a pulse-operated electromechanical device
A control for controlling an output of a system of an automotive vehicle having an electric-operated control device that controls an output of a system of the automotive vehicle in accordance with...
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6297941 |
Device for controlling an electromechanical actuator
A device for controlling an electromechanical actuator with an actuating element and an actuating drive. The actuating drive includes an electromagnet which has a core and a coil. The actuating...
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6285151 |
Method of compensation for flux control of an electromechanical actuator
A method of controlling velocity of an armature of an electromagnetic actuator as the armature moves from a first position towards a second position is provided. The electromagnetic actuator...
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6282076 |
Method for controlling an electromagnetic operator of an electrical device
An electromagnetic operator includes first and second coils wound coaxially. An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be...
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6275368 |
Method and apparatus for controlling electromagnetic valve in industrial vehicle
A method and an apparatus for preventing a solenoid from being heated by an exciting current. When a hydraulic cylinder is permitted to extend and retract, a controller commands a high-side driver...
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6256185 |
Low voltage direct control universal pulse width modulation module
An electrical control module and circuit for controlling a solenoid. The control circuit provides a constant voltage to a solenoid for a predetermined time period after which a pulse width...
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6252389 |
Current detector having magnetic core for concentrating a magnetic flux near a hall-effect sensor, and power switch apparatus incorporating same
A current detector includes a Hall-effect device 18 for detecting a magnetic field generated by a current flowing across a conducting portion; a magnetic core 19 having a first end face for...
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6246562 |
Control device of an electromagnet, with a power supply circuit supplied by the holding current of the electromagnet
The control device comprises a holding coil, an electronic switch and a power supply circuit connected in series to the terminals of a supply voltage of the coil. A circuit for measuring the...
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6233132 |
Zero cross relay actuation method and system implementing same
An electromechanical relay drive system which prolongs relay life by ensuring operation of the relay in a manner to make and break contact between the contact electrodes at a zero crossing point of...
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6226167 |
Proving switch
A proving switch is provided for an electromagnetic device for brakes and clutches having an energization coil energizable to attract an armature to a magnet body, the coil exhibiting increasing...
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6222713 |
Electrical protective equipment switch with overcurrent and undervoltage function and overcurrent sensor for it
The protective equipment switch comprises a mechanical switching contact (2) for a conductor (S1-S3), a latchable switch latch (6) for the switching contact (2), an overcurrent sensor (3)...
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6201681 |
Control apparatus for electromagnetic actuator
A control apparatus for an electromagnetic actuator for driving a mechanical element by using an electromagnetic coil. The control apparatus includes a circulation circuit for circulating current...
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6172862 |
Partial discharge relay and monitoring device
A portable partial discharge detecting device for measuring partial discharge in energized electrical systems encloses a relay circuit and a DC power source. A pair of sensor circuits are enclosed...
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6166896 |
Method of increasing the cast-off speed of the armature in an electromagnetic actuator
A method of increasing a cast-off speed of an armature from a pole of an electromagnet of an electromagnetic actuator, includes the following steps: holding the armature at the pole against a force...
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6158715 |
Method and arrangement for the electromagnetic control of a valve
In a method and apparatus for controlling a valve with an electromagnetically operable valve element, when an assigned solenoid is energized by means of a capturing current pulse, the valve element...
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6141202 |
Method and apparatus for triggering a fuse
The response time of a melting fuse is controlled or influenced by temporarily boosting a threshold level from a first constant value (I 1 ) to a second dynamic value (I 2 ) which is then caused to...
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6123092 |
Electromagnetic solenoid valve drive circuit
A circuit for driving an electromagnetic solenoid valve, used as a fuel injector in an internal combustion engine, having a needle valve biased in a closing direction by a spring and a solenoid...
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