Matches 1 - 50 out of 84 1 2 >


Match Document Document Title
US20130175012 POWER CONVERSION DEVICE, MOTOR INCLUDING THE SAME, AIR CONDITIONER HAVING THE MOTOR INCORPORATED THEREIN, AND VENTILATION FAN HAVING THE MOTOR INCORPORATED THEREIN  
A power conversion device includes a printed circuit board, whose mounting surface is opposite to an annular surface formed by an annular stator that constitutes a motor, arranged to be separated...
US20120161682 RETROFIT MOTOR SYSTEM FOR HEATING, VENTILATION, AND AIR CONDITIONING APPLICATIONS  
A motor control system for heating, ventilation, and air conditioning (HVAC) applications is described. The motor control system includes a thermostat and an electronically commutated motor (ECM)...
US20120319635 METHOD AND CIRCUIT FOR CONTROLLING MOTORS  
A method for controlling a motor comprises steps of: first, determining whether a switch of a motor control circuit in an electronic system is in a first state; then, operating the motor at a...
US20110075354 FAN DELAY CONTROLLING APPARATUS  
A fan delay controlling apparatus includes a connector connected to a fan of an electronic device, a power supplying module connected to the connector, and a power controlling module connected to...
US20110204837 SYSTEM AND METHOD FOR CONTROLLING DUTY CYCLE OF CPU FAN  
A fan duty cycle controlling system and method are implemented by a computing device. The fan duty cycle controlling system obtains an optimum duty cycle range of a fan around a central processing...
US20150263649 MOTOR CONTROLLER  
There is provided a motor controller including: a voltage generator that generates a voltage applied to a motor; a temperature detector that detects a temperature of a circuit; a rotation speed...
US20130033213 FAN CONTROLLING CIRCUIT FOR SERVER COMPUTER  
A circuit for controlling fans of a server computer includes a temperature sensing module configured to sense a temperature inside the server computer and a complex programmable logic device...
US20140350762 METHOD AND DEVICE FOR TEMPERATURE-DEPENDENT CONTROL OF AN ELECTRIC MOTOR  
An apparatus for temperature-dependent control of an electric motor, includes a control device for adjusting the power output of the electric motor, and means for detecting the temperature of a...
US20110037424 CONTROL CIRCUIT FOR FAN  
When the fan inserted in the fan header is a 4-pin fan, the control chip outputs PWM signals with different duty factors to the control pin of the fan header, to automatically change the rotary...
US20100117580 Rechargeable electric power tool  
In a rechargeable electric power tool, upon changeover of a trigger switch, a microcomputer determines the magnitude relation between the detected temperature outputted from the first thermistor...
US20100320951 INVERTER DEVICE, ELECTRIC AUTOMOBILE IN WHICH THE INVERTER DEVICE IS MOUNTED, AND HYBRID AUTOMOBILE IN WHICH THE INVERTER DEVICE IS MOUNTED  
A torque limit section that applies limit to a torque instruction value of an electric motor such that a switching elements temperature is restricted to no more than an element upper limiting...
US20140062373 MOTOR DRIVING DEVICE AND METHOD OF PROTECTING MOTOR DRIVING DEVICE  
A motor driving device includes a motor driving circuit, an element temperature sensor, a control circuit, an ambient-temperature estimator, and an overheat protection processor. The motor driving...
US20090261769 METHOD FOR CONTROLLING FAN SPEED  
A method for controlling a fan speed is disclosed. The fan cools a CPU in a computer. The method includes defining a CPU-max-temp value of a CPU, such that the first fan speed is linearly enhanced...
US20110089878 MOTOR DRIVE DEVICE WITH LOCK PROTECTION FUNCTION  
A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal...
US20120091936 MOTOR CONTROLLER  
A motor controller controlling a rotational speed of a motor and including a thermal detector, a capacitor, an operational amplifier (OP), a charging/discharging circuit, a flip-flop and a logic...
US20120230843 COOLING SYSTEM FOR AN ELECTRIC DRIVE MACHINE AND METHOD  
A cooling system includes a cooling duct extending between a first component and a second component of a machine. A motor powered fan in the cooling duct creates an airflow in the duct. First and...
US20120068652 FAN DRIVE CIRCUIT FOR ELECTRONIC DEVICE  
A fan drive circuit for driving a fan used in an electronic device to rotate includes a heat detector, a control unit, an integrating circuit, a regulating circuit; and a power supply. The power...
US20100117581 Rechargeable electric power tool  
A rechargeable electric power tool includes a motor driven by a secondary battery, a switching element for regulating power distribution to the motor, a motor control unit for controlling rotation...
US20110094821 ELECTRICAL POWER SUPPLY UNIT FOR VEHICLE  
An electrical power supply unit for vehicle comprises: a Main Power Supply 100, a Voltage Converter 40 for converting the output voltage of the Main Power Supply 100 to supply electrical power to...
US20130320747 ELECTRIC AUTOMOBILE  
An electric vehicle includes a motor unit to drive a wheel. The electric vehicle also includes a control system that controls the motor unit. The control system includes an inverter. The electric...
US20090102405 Motor controller of air conditioner and method of the motor controller  
The present invention relates to a motor controller for an air conditioner and a motor control method. The motor controller including a converter converting AC utility power into DC power and an...
US20120274255 FAN SPEED CONTROL CIRCUIT  
A fan speed control circuit for controlling the rotation speed of a fan motor unit. The speed control circuit includes a resistor, a voltage stabilizing unit, a transistor and a thermal resistor....
US20120161683 FAN SPEED CONTROL CIRCUIT  
A fan speed control circuit includes a voltage input terminal, a thyristor, a thermistor, and first and second switches. The terminal is grounded through a first resistor and the thermistor,...
US20120274249 ELECTRICAL MACHINE, METHOD OF CONTROLLING AN ELECTRICAL MACHINE, AND SYSTEM INCLUDING AN ELECTRICAL MACHINE  
A method of controlling an electrical machine. The electrical machine includes a stator having a core and a plurality of windings, and a rotor disposed adjacent to the stator to interact with the...
US20100066292 Retarding energy calculator for an electric drive machine  
A cooling system for a retarding system of an electric drive machine (100) includes a direct current (DC) link having first and second rails. A first resistor grid (214) is selectively placed in...
US20130342148 ELECTRIC POWER STEERING DEVICE  
A microcomputer calculates an internal resistance value of a motor, and subsequently calculates an internal resistance value of a switching element of a motor drive circuit. When the internal...
US20090088294 THERMAL PROTECTION OF AN ELECTRIC DRIVE SYSTEM  
Temperature of an electric drive is regulated to prevent undesirable thermal effects. Temperature conditions of the electric drive system are monitored and torque of the electric drive system is...
US20100171456 VOLTAGE SOURCE INVERTER WITH A VOLTAGE OFFSET  
Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage...
US20150145457 Control Circuits for Motors and Related Methods  
Control circuits and related methods are provided. One exemplary control circuit includes a solid state switching device for coupling to a first tap of a motor and a control device coupled to the...
US20120007531 FAN MOTOR CONTROL SYSTEMS  
A fan system includes a motor control module external to a motor housing of a fan assembly. The motor control module includes a speed control module. The fan assembly includes a fan and the motor...
US20070132416 Sprayer thermal protection  
In an electric airless sprayer (16), as the motor (14) temperature approaches allowable limits, several performance cutbacks can be used to prevent overheating. The preferred method is to...
US20130175964 ELECTRIC COMPRESSOR  
An electric compressor capable of following temperature changes of a power element even if a temperature measurement unit is disposed separately from the power element. In the electric compressor,...
US20120223666 PULSE WIDTH MODULATION FAN CONTROLLER  
A pulse width modulation (PWM) fan controller includes a sensor, a generator, a selector, and a multiplexer. The sensor is configured for sensing a current temperature of an electronic device. The...
US20090051307 EXCESSIVE TEMPERATURE DETECTING SYSTEM OF ELECTRIC MOTOR CONTROLLER  
An electric motor controller for a vehicle has a voltage detecting section for detecting the voltage of a filter capacitor inserted on a direct current side of an inverter device including a...
US20110042969 CONTROL METHODOLOGY FOR AN AC STARTER-GENERATOR SYSTEM  
An aircraft engine starting system may comprise a starter motor, a start controller for controlling the starter motor to operate with a desired torque output, and a processor for determining...
US20110089881 ELECTRIC COMPRESSOR  
Provided is an electric compressor whose manufacturing cost is reduced and in which a motor driving circuit can be positively protected. A temperature sensor is provided in the vicinity of a power...
US20120044644 FAN SYSTEM AND ELECTRONIC DEVICE  
A fan system includes a pulse signal generation portion and a plurality of fans. Each of the plurality of fans preferably includes a motor portion; an impeller arranged to be rotated by the motor...
US20130169207 METHOD AND DEVICE FOR PROTECTING AN INVERTER POWER SWITCHING SEMICONDUCTOR DEVICE FROM THERMAL CYCLING  
A method and device for protecting a power switching semiconductor inverter from thermal cycling is disclosed. The method compares the actual frequency of the inverter to a low fundamental...
US20150145458 CONTROLLING CIRCUIT FOR OUTPUTTING A SQUARE WAVE SIGNAL TO CONTROL A FAN ROTATING SPEED  
A controlling circuit for outputting a square wave circuit to control a fan rotating speed is disclosed, where an output unit continuously outputs the square wave signal and the output unit is...
US20140191695 THERMAL PROTECTION METHOD AND SYSTEM TO MAXIMIZE AVAILABILITY OF ELECTRIC DRIVE SYSTEM  
An electric drive system may include a plurality of heat sensitive components, at least one temperature sensor positioned in or on each of the components and a system controller. The temperature...
US20090001915 METHOD AND APPARATUS FOR ACTIVE VOLTAGE CONTROL OF ELECTRIC MOTORS  
Methods and apparatus are provided for dynamic voltage control of electric motors. An inverter provides an output voltage to an electric motor based on a gate voltage. The method includes...
US20140169982 HEAT DISSIPATION SYSTEM, ROTATION SPEED CONTROL CIRCUIT AND METHOD THEREOF  
A rotation speed control circuit is disclosed. The rotation speed control circuit includes a temperature-controlled voltage duty generator, a pulse-width signal duty generator, a multiplier and a...
US20130147411 SYSTEM AND METHOD FOR CONTROLLING FANS  
A system for controlling fan speed, wherein fans are employed to dissipate heat generated by a plurality of hard disk drives divided into groups, includes a temperature sensor detecting an overall...
US20120194117 FAN CONTROL SYSTEM  
A fan control system includes a temperature detecting circuit and a rotation rate control circuit. The detecting circuit includes a first amplifier, a second amplifier, and a thermistor. The...
US20120194116 FAN CONTROL SYSTEM  
A fan control system includes a temperature detecting circuit and a rotation rate control circuit. The detecting circuit includes a first amplifier, a second amplifier, and a thermistor. The...
US20130249460 POWER CONVERSION APPARATUS  
In a power conversion apparatus that is configured to cool switching elements by using a boiling-refrigerant-type cooling device that uses a boiling phenomenon of a refrigerant included therein,...
US20130307457 Method Of Optimising Input Components  
A method of controlling a current flowing through a component of a drive comprising the steps of: estimating the current flowing through a component; estimating the temperature of the component;...
US20110089880 FAN CONTROL SYSTEM  
A fan control system includes a temperature detecting circuit and a rotation rate control circuit. The detecting circuit includes a first amplifier, a second amplifier, and a thermistor. The...
US20100064706 CONTROL DEVICE, METHOD, AND PROGRAM OF PERMANENT-MAGNET TYPE SYNCHRONOUS MOTOR  
There is provided a control device of a permanent-magnet type synchronous motor that sets a synchronous operation current at start-up in response to a current limiting value determined from the...
US20130119912 Power Conversion Device and Temperature Rise Calculation Method Thereof  
A temperature rise of a semiconductor switching element, which is part of a power conversion device such as an inverter, is estimated by an extremely simple method to assess the degradation and...

Matches 1 - 50 out of 84 1 2 >