Matches 1 - 50 out of 195 1 2 3 4 >
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7450356 Rotation speed controller for fans  
A specially designed rotation speed controller for fans, in addition to basic components like variable resistor, the controller has also been equipped with special components such as TRIAC, micro...
7379285 Apparatus for driving inductive load  
An apparatus is disclosed that drives an inductive load according to a control signal from an external controller transmits temperature data to it for indicating a condition of the inductive load...
7362550 Electric motor comprising a temperature monitoring device  
Disclosed is an electric motor comprising a temperature monitoring device which is provided with at least two temperature sensors that have different temperature characteristics and are connected...
7321214 Motor control system  
A controller is operable in one of a plurality of operational modes, which include an estimated temperature computation performing mode for performing computing of an estimated temperature of the...
7321213 Motor controller  
A motor controller is provided with: an estimated temperature calculating means that calculates an estimated temperature of a motor; and a control unit that can perform a driving control of the...
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...
7304447 Motor controller  
A motor controller includes: a motor control part for driving and controlling a motor; an estimated temperature computing part for computing an estimated temperature of a winding of the motor; and...
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...
7161779 Anti-pinch and electrical motor protection device  
An anti-pinch and electric motor protection device includes a positive temperature coefficient circuit protector having a predetermined temperature threshold and is adapted to be in electrical...
7161778 Rotor thermal model for use in motor protection  
The protective relay for an induction motor includes a first program function which establishes a first thermal threshold value for a start condition of the motor, using a start condition thermal...
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...
7123457 System for transitioning to the trip threshold for the start condition thermal model for a motor protection relay  
A system used in a protective relay for motors for transitioning the value of the trip threshold to a motor start (stall) condition. The calculated transition trip threshold value follows I 2 t,...
7064940 Over heat protection circuit for a brushless dc motor  
A over heat protection circuit for a brushless dc motor includes a thermal sensitive resistor, a resistor and a transistor. The thermal sensitive resistor and the resistor are commonly connected to...
7038896 Solid state motor protector  
A solid state motor protector has a first PTC chip (positive temperature coefficient of resistivity) electrically connected in series relation with a second resistor having a generally fixed...
7033073 Device and method for measuring the temperature of an electric motor  
In order to determine the temperature in the winding region of an electric motor, especially linear motor, a measuring line made of uniform; electrically conductive material is integrated in a...
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...
7005820 Apparatus for spindle bearing friction estimation for reliable disk drive startup  
Temperature of the disk drive is measured using components of the disk drive without the need of including a separate temperature sensor to optimize performance of the spindle motor during startup....
6960897 Apparatus and method for protecting starter for engine against overheating  
A method and an apparatus for protecting an engine starter of a motor vehicle against overheating with enhanced reliability by controlling turn-on/off of the starter in dependence on a conducting...
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...
6930867 Thermally suppressing circuit for restarting a locked motor  
A thermally suppressing circuit includes a restart-charging drive member, a coil set, a restart-charging capacitor, and a charging switch set. The restart-charging drive member is electrically...
6929396 System for temperature monitoring  
A system for monitoring the temperature prevailing in the stator unit of an electric drive includes a temperature sensor that is integrated into the windings of the stator unit and that transmits a...
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...
6924613 System and method for monitoring current and providing motor protection  
A motor controller system comprises solid state switches for connection between an AC line and motor terminals for controlling application of AC power to the motor. A user input elements selects a...
6920024 Thermally suppressing circuit for restarting a locked motor with a restart-discharging drive member  
A thermally suppressing circuit mainly comprises a restart-discharging drive member, a coil set, a restart-discharging capacitor, and a discharging switch set. The restart-discharging drive member...
6920023 Current limiting means for a generator  
The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding,...
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...
6861820 Control strategy for an electric motor using real time predictions of motor capability based on thermal modeling and measurements  
A system and method for controlling an electric motor using real time predictions of motor capability based on thermal modeling and measurements is provided. The invention includes controllers for...
6850822 Method and apparatus for preventing overheating of security gate motor  
A security gate operating system, is disclosed which comprises an electrically powered motor; a thermally controlled circuit breaker set to remove power to the motor when the motor reaches a...
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...
6724313 Fault detection system  
A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to...
6633802 Power management under limited power conditions  
A vehicle power system includes a multiple of electrical generators which provide power for vehicle electrical systems or loads through an electrical load management center which communicates with...
6520137 Starting motor  
A circuit disconnecting member that blows on receiving radiant heat generated by heat generation of a motor circuit is connected to a motor circuit, the blowing temperature being a temperature...
6498560 Protector assembly and method for electrically insulating a thermally responsive protector from a motor winding of an electric motor  
A protector assembly and method for protecting motor windings from an overload condition. The assembly comprises a thermally responsive protector, a skirt, and a sleeve. The protector comprises a...
6453260 Apparatus and method for collecting motor test data  
A system for motor thermal protector device performance test data collection includes a microprocessor configured to measure elapsed times of reset and trip power cycles of a motor winding through...
6405154 Method and apparatus for power electronics health monitoring  
A method for monitoring the health of power electronics includes: providing a switch command to a power electronic device ( 12 ) through a gate driver ( 14 ); measuring a switching time of the...
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...
6338026 Method for limiting an electric current through an electrical component, and limiting apparatus  
The thermal load of an electrical component is used as a basis to limit an electric current through the electrical component, in particular the rotor winding of a turbogenerator. This reliably...
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...
6331925 Two stage reciprocating compressors and associated HVAC systems and methods  
A two stage reciprocating compressor and associated HVAC systems and methods are disclosed. The reciprocating compressor includes a crankshaft having an eccentric crankpin, a reversible motor for...
6326879 Thermal switch arrangement for electromagnetic coils  
A thermal switch arrangement for electromagnetic coils of electric motors, including at least one coil, which has a winding (52, 54) and a coil former (30, 48) in the form of a winding core (32),...
6313974 Resistor for a servo amplifier and servo amplifier provided thereof  
Leg portions are provided at the four corners of a resistor that generates a large amount of heat and a partition panel is secured to the top of the leg portions through a heat-insulating spacer. A...
6301090 Control system using an electric motor  
The electric motor drive includes an electric motor (10); an end stage (12) for triggering the electric motor; a trigger circuit (18) for pulse-width-modulated triggering of the end stage, which is...
6297607 Thermal compensation control for a motor starter  
A motor starter thermal-compensation control is disclosed in which an ambient temperature sensor is positioned to sense ambient temperature and provide an ambient temperature signal in a motor...
6294888 Frequent start protection and economizer control for a motor starter  
A motor starter control is disclosed in which an ambient temperature sensor is positioned to sense ambient temperature and pole temperature sensors are used to sense each pole temperature in a...
6291958 Temperature limiting controller for electric machines  
A method (10, 30) for actively controlling the temperature (t motor ) of an electric machine operating under torque (T*), speed and/or position control. A controlled output (T*), i.e. torque...
6285150 Method for controlling the operating voltage of a fan in electrical equipment  
In order to control the operating voltage of a fan in electrical equipment, the temperature of an output diode (D) of an output circuit of the power supply of the electrical equipment is monitored....
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...
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...
6198186 Thermally self-protected electric motor  
An electric motor includes a stator having a plurality of conductive windings radially spaced about a central axis. A rotor is located radially inward up the stator and is rotationally fixed with...
6172860 DC power source unit alarming before electrically powered tool is overheated and stopping power supply thereafter  
A DC power source unit includes a main unit that generates DC voltage, and an output cable. The output cable has one end connected to the output of the main unit and another end attached to an...
Matches 1 - 50 out of 195 1 2 3 4 >