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7605352 |
Method for sorting positive temperature coefficient (PTC) elements
In a method for sorting PTC elements having different resistance-temperature characteristics, a predetermined voltage that allows a current to sufficiently decay is applied to each of PTC elements...
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7551418 |
Device for preventing internal combustion of equipment from spreading outwards
Two devices for preventing internal combustion of equipment from spreading outwards includes a sampling circuit, a detecting and monitoring circuit, and a low-voltage datum power supply. The...
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7538508 |
Thermal overload protection
A thermal overload protection for an electrical device, particularly an electric motor (M), measures a load current supplied to the electrical device (M), and calculates the thermal load on the...
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7498913 |
Thermal trip device and circuit breaker using the same
A thermal trip device in which a bimetal ( 2 ) is heated by overcurrent and performs trip operation of a circuit by curvature of the heated bimetal ( 2 ), wherein at least one part of the surface...
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7495876 |
Circuit breaker integral temperature monitoring for advance detection of defective power conductor connections
A circuit breaker includes a breaker enclosure, a plurality of conductor connections, and a temperature sensor. The breaker enclosure contains internal components that include a trip unit. The...
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7492566 |
Low resistance transient blocking unit
A transient blocking unit (TBU) having reduced series impedance is provided. A TBU includes two or more depletion mode transistors arranged to provide a low series impedance in normal operation and...
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7453679 |
Apparatus and method for driving inverter circuit
An inverter apparatus includes an inverter circuit, a temperature sensor, and a control circuit. The inverter circuit is driven by a PWM signal and includes switching elements that are divided in...
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7446643 |
Resetable over-current and/or over-temperature protection system
An electrical protection system, which can be connected between an electrical power supply and an electrical load, firstly includes a switch switchable between a normal state in which the switch is...
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7400482 |
Circuit breaker and method for sensing current indirectly from bimetal voltage and determining bimetal temperature and corrected temperature dependent bimetal resistance
A circuit breaker includes a bimetal electrically connected in series with separable contacts, and an operating mechanism structured to open and close the contacts. A temperature sensor distal from...
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7369387 |
Apparatus and method for temperature-dependent transient blocking
An apparatus and method for temperature-dependent transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least...
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7336055 |
Method for detecting abnormality of temperature sensors, and power supply apparatus
A power supply apparatus includes an assembled battery including a plurality of cells, a plurality of temperature sensors sensing temperatures of the plurality of cells, respectively, a current...
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7272885 |
Method of manufacturing surge arrestor
The present invention relates to a method of manufacturing surge arrestors, the method including stacking varistors; and forming a coating of composite material on the stack. Between these steps,...
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7250794 |
Voltage source converter
A voltage source converter with a line-side diode rectifier, a load-side inverter with an electronic circuit, a power supply for the electronic circuit, and a slim DC link with a DC link capacitor...
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7203049 |
Over-current protection device
The over-current protection device of the present invention uses the unbalanced properties of the thermal expansion coefficients between the outer and inner sides for an upper metallic conductive...
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7187161 |
Transient protection of sensors
The present invention includes a system with a sensor to detect a change in one or more physical characteristics and provide a corresponding electrical sensor signal, a controller including a power...
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7145759 |
Overcurrent protection circuit including auto-reset breaker and PTC resistor
An overcurrent protection circuit for low-voltage, high-current electrical systems comprises a Positive Temperature Coefficient (PTC) resistor in series with an auto-reset thermal breaker. The...
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7113381 |
Overcurrent protection circuit including auto-reset breaker and PTC resistor
An overcurrent protection circuit for low-voltage, high-current electrical systems comprises a Positive Temperature Coefficient (PTC) resistor in series with an auto-reset thermal breaker. The...
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7109877 |
Fault monitoring apparatus and method
A fault condition monitoring apparatus for use with a fuse cutout includes a housing operable to be supported by the fuse cutout. The housing has first and second contacts operable to make...
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7079003 |
Secondary battery with protective circuit
A secondary battery of the present invention a heat-sensitive element which varies in resistance value due to change of temperature is not placed on a path through which a charge or discharge...
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7050283 |
Method and apparatus for protecting monitor circuit from fault condition
A method and apparatus for improving the fault protection of a monitor circuit is provided by coupling an input protection circuit to an output section. The input protection circuit may include a...
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6982528 |
Thermal protection for lamp ballasts
The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and...
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6963477 |
Overheat protection circuit
A semiconductor switching element performs operations of bringing a current path from a power supply to a load into conduction and interrupting the path and is controlled by an operating-mode...
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6937454 |
Integrated device providing overcurrent and overvoltage protection and common-mode filtering to data bus interface
An electrical component includes a mounting substrate, a common-mode rejection filter mounted to the substrate, and at least one circuit protection element mounted to or formed by the substrate....
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6930870 |
Semiconductor device with protective functions
The semiconductor device is inserted between a power source and a load. A current flowing between an external drain terminal D and an external source terminal S is controlled in accordance with a...
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6922131 |
Electrical device
An electrical device suitable for use in digital telecommunications applications is provided. The device includes a laminar PTC element composed of a conductive polymer composition sandwiched...
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6906901 |
Cooling apparatus for integrated circuit
A cooling apparatus for an integrated circuit. The cooling apparatus comprises cooling fan means, a control circuit and heat pipe means. The control circuit determines a spinning speed of the...
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6888469 |
Method and apparatus for estimating semiconductor junction temperature
An apparatus is disclosed that provides an estimate of the semiconductor junction temperature of a semiconductor device as a function of the electrical current flowing across the corresponding...
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6862164 |
Circuit protection arrangement
A circuit protection arrangement particularly useful in protecting battery assemblies. The arrangement contains a first PTC device which has a first switching temperature T s1 , has a resistance at...
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6846693 |
Chip-type composite electronic component and manufacturing method thereof
An inductor obtained by laminating a plurality of ceramic layers having an internal coil conductor, and a thermistor obtained by laminating a plurality of ceramic layers having internal electrodes...
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6813131 |
Circuit breaker, trip assembly, bimetal compensation circuit and method including compensation for bimetal temperature coefficient
A circuit breaker includes separable contacts, a latchable operating mechanism having a latch member, a bimetal and an arc fault trip assembly. The trip assembly includes a thermistor responsive to...
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6806806 |
Polymer fuse and filter apparatus
A fuse and filter arrangement having a polymer fuse apparatus that provides bypass fuse protection. A polymer bypass fuse includes of an electrical conductor wherein a portion of the conductor is...
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6768624 |
Fan protection
In a protection circuit for a plurality of fans, an element is associated with each fan. The impedance or the current value of the element indicates the operation condition of the fan. For example,...
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6717784 |
Rush current suppression circuit
A rush current suppression circuit is used with a power supply circuit which includes a common line and an input voltage detection circuit and supplies power from an input power supply via a...
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6667461 |
Multiple load protection and control device
An electrical device includes a package having an array of connections, a thermally conductive, electrically insulative substrate in the package, a plurality of polymeric positive temperature...
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6665164 |
Surface mountable over-current protecting apparatus
The present invention relates to an over-current protecting apparatus, which comprises at least one PTC over-current protecting component and a body. The PTC over-current protecting component has a...
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6661633 |
Protective element
The protective element 20 A includes a first PTC element 1 , as well as a low-melting-point metal member 2 , a heat-generating member 3 and a second PTC element. A the PTC material 1 ′...
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6606231 |
Integrated telephony subscriber line protection and filter device
A protection device includes a substrate capable of suppressing electromagnetic fields, with a channel formed therein, a current dependent circuit interrupter disposed inside the channel, and...
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6574084 |
Electromagnetic repulsion driven switch
An electromagnetic repulsion drive switching device in which a contact-closing coil and a contact-opening coil are arranged to confront a conductive repulsive member, and in which a drive current...
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6542846 |
Thermal management system for a portable ultrasound imaging device
A thermal management system for a portable battery powered electronic device, and particularly, a portable battery powered ultrasound device, which controls the temperature of the device such that...
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6492799 |
Monitor circuit for a current limiting device
An electrical monitor circuit in which star points of taps on a first and a second side of a three-phase current limiting device are voltage compared. Possible applications are combinations with...
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6483686 |
Circuit for indicating abnormality of three-mode surge absorber of public electric power and a multiple-end fuse
A circuit for indicating abnormality of a three-mode surge absorber of a public electric power is disclosed. The circuit is serially connected between the input end and output end of a public...
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6466424 |
Circuit protective device with temperature sensing
A temperature sensor for use in a circuit breaker is disclosed. The temperature sensor is included in the circuit breaker and detects temperature of a target within the current path of the breaker....
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6462926 |
Low loss diode-oring circuit
A low loss diode ORing circuit has a feed input connected in series with a diode/transistor parallel network and the ouput. Heat is generated by the transistor when the transistor is turned on. A...
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6414832 |
Thermal protection device for a remotely regulated vehicle alternator
The present invention provides an apparatus for reducing the allowed output current from an electrical device such as a high output capacity vehicle alternator in response to a sensed over...
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6411484 |
VLSI circuit with temperature monitoring
The VLSI circuit has one or more integrated semiconductor chips disposed in a housing and connected via connecting lines to contact terminals that are accessible from outside the housing. A...
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6392551 |
Synthetic fiber cable with temperature sensor
A synthetic fiber cable, preferably of polyamide material, consists of a bundle of load-bearing synthetic material fibers and at least one conductive temperature sensor element extending a length...
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6377434 |
Individual secondary protection device
A secondary protection device for protecting a circuit. The device includes a first positive temperature coefficient (PTC) resistor, a bidirectional zener diode and a second PTC resistor connected...
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6373347 |
Power control circuits and methods
The present invention provides simple, low cost power control circuits and methods for high frequency (e.g., RF) applications. According to one embodiment of the present invention, a high frequency...
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6368734 |
NTC thermistors and NTC thermistor chips
An NTC thermistor has an electrically insulating substrate, a temperature-sensitive film on a surface of the substrate containing oxide of rare earth elements such as LaCoO 3 as its principal...
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6356424 |
Electrical protection systems
An electrical protection system on a power distribution side includes a control element of a series combination of a PTC device thermally coupled with a resistive device, and a relay coil coupled...
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