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7622879 |
Thermal protection apparatus and method for hybrid vehicles
Thermal variable-operation regulator that regulates the operation of an operating device by progressively limiting the operation of the operating device ( 24 ) as a limitation temperature (Tset)...
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7622835 |
Motor protector attachment system
A motor protector receiving bracket ( 10 ) is shown for use with a multiphase motor protector having at least two terminal pins ( 4 and 5 ). The bracket has a back wall formed with first ( 12 e )...
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7619859 |
Electric power steering device
An electric power steering device that can estimate an ambient temperature and apply current limiting without using ambient temperature detecting means is provided. The electric power steering...
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7486490 |
Actuator for the actuation of a clutch and/or a gear mechanism
An actuator for a clutch or gear mechanism in a motor vehicle comprises an electric motor and an incremental encoder. The encoder comprises a position measurement signal output at which a position...
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7486489 |
System and method for speed control and stall protection combination for electric motors such as in engine cooling applications
A speed control and stall protection system 10 for an electric DC brush motor includes a DC brush motor M. At least one relay K 3 is connected between the motor and a power supply. A speed...
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7397222 |
On-line testable solid state reversing DC motor starter
A solid state reversing DC motor starter that is testable on-line and satisfies the requirements for nuclear safety grade equipment. The motor starter employs a bridge of solid state switches which...
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7394629 |
Motor overload tripping system and method with multi-function circuit interrupter
A technique is provided for controlling operation of motors of different sized or ratings. Components used to apply and interrupt current to the motors may be shared in control devices for the...
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7383133 |
Diffuse seismic imaging systems and methods
Systems and methods are disclosed to construct subsurface images from diffuse seismic energy. Various disclosed system embodiments include multiple seismic sensors that each convert received...
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7372676 |
Motor coil-shorting detecting unit
In order to be acceptable for safety critical applications, it is necessary for an electrical machine to allow continued operation despite an electrical short circuit in one of the operational...
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7336048 |
Method for operating a power tool
In a method for operating a power tool with an energy accumulator, in particular a rechargeable energy accumulator, which supplies power to an electric drive motor, a clock frequency is generated...
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7307396 |
Overload protection system for an electrical device
A protection system for an electrical device may include at least one temperature sensitive element located in a region adjacent to a component of the electrical device and configured to provide an...
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7259946 |
Integrated electric motor and control system and method
An electrically and thermally protected electrical machine is disclosed. The electrical and thermal protection is provided by one or more control components placed in a conduit box of the...
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7222050 |
Apparatus for determining overheating of motor, method for determining overheating of motor, computer-readable medium, motor control apparatus, motor control method, and printing apparatus
A temperature condition of a motor is estimated more accurately based on a drive amount of the motor. An apparatus for determining overheating of a motor, includes: an information obtaining section...
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7206176 |
Circuit and method for protecting against overload of an electric motor
The invention relates to a circuit ( 1 ) for protecting against overload of an electric motor ( 2 ), more particularly an electrically powered air blower for a vehicle, with the purpose of...
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7162883 |
Compressor diagnostic method
A method includes determining base-line operating parameters for a compressor, generating a high-side signal indicative of high-side compressor operating conditions, generating a low-side signal...
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7161318 |
Regulating device for a motor
The invention relates to a regulating device ( 1 ) for a motor, comprising a housing ( 2 ) which can be associated with said motor and in which a control unit ( 5 ) and an actuator ( 6 ) are...
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7116588 |
Low supply voltage temperature compensated reference voltage generator and method
A reference voltage generator uses a conventional forward junction voltage generating device and a conventional thermal generator to generate a thermal voltage. The forward junction voltage and the...
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7085662 |
Power quality indicator
There is provided a method and a power quality indicator coupled to an electrical circuit. The indicator comprises the summing device configured to received a sensed wave form from the electrical...
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7042180 |
Brushless and sensorless DC motor control system with locked and stopped rotor detection
A motor control system for a brushless and sensorless DC motor for driving a compressor, pump or other application, includes a protection and fault detection circuit for detecting a locked rotor...
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7023164 |
Robot and over-current protection device for a robot
It is so arranged in a robot as to monitor the over-current state of each motor and that of two more than two motors when put together by seeing the total current value of the motors being...
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7019951 |
Extended trip range motor control system and method
A technique is provided for controlling and protecting loads such as electric motors. In the technique, current sensing circuitry detects electrical current applied to the load. Device thermal...
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7019480 |
Synchronous-motor controller
A synchronous-motor controller including an inverter for converting direct current to alternating current in order to supply a synchronous motor with a current responsive to a torque instruction...
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7015665 |
Power window driving apparatus
A power window driving apparatus includes a motor which drives a window by supplying a supply voltage of a power supply, a control circuit which controls the motor so as to stop or reverse a...
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6946967 |
Protective device for an electric motor with sensor and evaluation unit
A protective device includes a signal input intended for connection to a sensor, a signal output intended for connection to an evaluation unit, and an isolation element for galvanically separating...
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6927549 |
Electric motor control unit
An electric motor control unit mounted in an automotive vehicle having a motor that is variable in its rotational speed. A temperature sensing element is arranged to contact a busbar so that relays...
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6927953 |
Auxiliary rotation-system starter
An auxiliary rotation-system starter includes a starter motor, a main circuit portion having a main contact portion, an auxiliary circuit portion having a driving coil portion for opening or...
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6927960 |
Circuit protection device
A circuit protection device includes an overheat protecting circuit connected to a main circuit and capable of being activated so as to shut down the main circuit when operating temperature of the...
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6897782 |
Thermal monitoring of an electric load element
A method for monitoring thermal overload of an electric load element in a motor vehicle containing other electric consumers, which can be switched into a stand-by phase is disclosed. The load...
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6885535 |
Non-linear snubber circuit
A control circuit for a motor including a contactor circuit having a contactor, a first end and a second end, and a snubber circuit connected across the contactor circuit. The snubber circuit...
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6853523 |
System and a method for protecting an electric motor and its control circuit, and an electric motor
A system and a method for protecting electric motors and their respective control circuits are described, wherein it is possible to distinguish whether a situation of surge current results from a...
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6847187 |
Detection of loss of cooling air to traction motors
A thermal protection apparatus for an AC traction motor including a stator, a rotor, a blower fan and an inverter includes a method and apparatus for predicting the motor temperature assuming that...
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6829556 |
Method and system for detecting incipient failures in a traction system
A method and system for operating an electrical system including an electrical machine to predict an incipient fault in the electrical machine. A neutral-to-ground leakage signal representative of...
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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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6747300 |
H-bridge drive utilizing a pair of high and low side MOSFETs in a common insulation housing
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs....
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6744609 |
Motor control circuit having motor protective circuit
When an operation switch of a motor control circuit is switched on or when the operation switch and an automatic operation switch are simultaneously switched on, a switching device is switched on...
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6600641 |
Overcurrent protection for the series fuse
This invention includes a circuit that approximates the thermal behavior of a fuse or other electronic device that is coupled in series with the circuit. In one preferred embodiment, the circuit...
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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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6495982 |
Electric motor control
A start-up switch 50 for an electric motor 1 comprises a resistive element ( 54 ) which is so constituted as to be connectable to an electric current path ( 15 ) and which has such a...
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6459181 |
Electric motor unit, in particular for motor vehicle, incorporating a control electronics
An electric motor unit with continuous current containing a connection plate and a card that carries electronics for the control of the motor. The card also contains electronics to monitor the...
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6452359 |
Starting system for an electric motor
An improvement in a starting system for an electric motor, which drives a hermetic compressor of refrigeration and comprises a main winding ( 1 ), and an auxiliary winding ( 2 ), which are...
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6351360 |
Apparatus for selective shutdown of devices of an integrated circuit in response to thermal fault detection
An integrated circuit including one or more power devices, and circuitry which reliably (and independently) shuts down each power device that is detected to be in an undesired operating condition...
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6346810 |
Electric motor control using temperature and magnetic field strength variation of its stator liminations
A sensor for facilitating the measurement of temperature and magnetic field is described. The sensor comprises an optical cable having a distal end encompassed in a sheath of giant magnetoresistive...
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6342994 |
Protective device against excessive currents, in particular for resettable protection of a controlled switch
A protective device against excessive currents occurring in an electric circuit between a voltage source and a load mounted downstream of said device, comprising a first triggering component with...
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6339310 |
Motor driving control device
A motor driving control device that achieves as high as possible phase coil energization level while preventing thermal destruction of the power switching element by using precise thermal detection...
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6338016 |
Method and apparatus for detecting a motor stall condition in an electric assist steering system
A vehicle electric assist steering system ( 10 ) includes a switching circuit ( 56 ) for providing electrical power to an electric motor ( 52 ) of the vehicle steering system. The switching circuit...
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6268986 |
Motor control unit
In a motor control unit adapted to control each switching element of each switching arm and control the current sent to a motor, the temperature sensing diodes 19a.about.19c are arranged near the...
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6252365 |
Breaker/starter with auto-configurable trip unit
A combination circuit breaker/motor starter includes a circuit breaker trip unit having a microprocessor and at least one removably connectable contactor or other functional module. The functional...
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6252752 |
Overload protection apparatus and a speed reducer having such an apparatus
A semiconductor switch is installed in a power supply line of a motor, and photocouplers, which constitute a switching control circuit for turning on and off the semiconductor switch, are...
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6249104 |
Cutout start switch heating
A motor start switch includes a temperature responsive resistor element and a cutout switch electrically connected in series with a start winding of an electric motor. The cutout switch is in...
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6204628 |
Motor start switch
A method and apparatus are provided for disconnecting a starting winding of a single-phase motor during startup. The method includes the steps of disposing a heater element of a thermal switch in...
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