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| Application No. | Application Title | Issue Date |
| 20120081056 | APPARATUS AND METHOD FOR CONTROLLING SPEED OF FAN IN COMPUTER An apparatus and method controls a speed of a fan in a computer. The apparatus includes a signal generator, a signal buffer, a signal switch, and an integrated baseboard management controller (IBMC). The IBMC includes a general purpose input output (GIPO) pin and a sign... | 04/05/2012 |
| 20120068652 | 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 supply cooperates with the regulating circuit to drive the fan to rotate, t... | 03/22/2012 |
| 20120044644 | 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 portion; a drive circuit arranged to drive the motor portion; a rotation d... | 02/23/2012 |
| 20120007531 | 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 housing. One or more first conductors are configured to connect the motor ... | 01/12/2012 |
| 20110279975 | MOTOR DRIVING CIRCUIT A first calculation unit subtracts third digital data which indicates the minimum value of the duty ratio from first digital data which indicates the duty ratio of the PWM driving operation. A slope calculation unit generates slope data which is dependent on the tempera... | 11/17/2011 |
| 20110204837 | 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 unit (CPU), and controls the fan to operate at the optimum duty cycle ran... | 08/25/2011 |
| 20110101903 | FAN CONTROL SYSTEM A fan control system includes a temperature detecting circuit and a rotation rate control circuit. The detecting circuit includes an amplifier and a thermal diode. The detecting circuit detects temperature and outputs a voltage signal. The control circuit receives the v... | 05/05/2011 |
| 20110094821 | 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 a Motor Drive Circuit 30, a Subsidiary Power S... | 04/28/2011 |
| 20110089881 | 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 semiconductor element whose temperature becomes highest among a plurality... | 04/21/2011 |
| 20110089880 | 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 control circuit includes a first terminal, a second terminal, and a third termi... | 04/21/2011 |
| 20110089878 | 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 instructing rotation of the fan motor that is to be driven instructs stoppage ... | 04/21/2011 |
| 20110075354 | 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 the power supplying module. The power supplying module is connected to a f... | 03/31/2011 |
| 20110042969 | 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 torque profiles for the starter motor. The processor may provide an initial tor... | 02/24/2011 |
| 20110037424 | 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 speed of the 4-pin fan. When the fan inserted in the fan header is a 3-pin f... | 02/17/2011 |
| 20100320951 | 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 temperature includes a torque restriction section that finds a torque restrict... | 12/23/2010 |
| 20100171456 | 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 level, the method comprising sensing a low output frequency condition; determ... | 07/08/2010 |
| 20100117581 | 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 of the motor through the switching element, a lead wire for supplying a d... | 05/13/2010 |
| 20100117580 | 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 and the first temperature threshold value, the second temperature threshold... | 05/13/2010 |
| 20100064706 | 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 temperature of an inverter that supplies three-phase power to the permanent-... | 03/18/2010 |
| 20100066292 | 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 circuit between the rails by an automatic switch (216)... | 03/18/2010 |
| 20090295317 | Ultra-compact, high-performance motor controller and method of using same Featured is a controller for a motor that is ultra-compact, with a power density of at least about 20 watts per cubic cm (W/cm3). The controller utilizes a common ground for power circuitry, which energizes the windings of the motor, and the signal circuitry,... | 12/03/2009 |
| 20090261769 | 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 with the increase of a real temperature value of the CPU, when the real t... | 10/22/2009 |
| 20090174353 | Motor control device A motor control device has a drive circuit that is respectively provided on arms of an inverter circuit supplying current to an AC motor, and that drives a switching element included on the arms; and a power source control circuit that performs a control of a power supp... | 07/09/2009 |
| 20090153088 | METHOD AND DEVICE FOR TEMPERATURE LIMITATION ACCORDING TO CURRENT AND/OR VOLTAGE The invention relates to a method for temperature limitation according to the current and/or voltage, for an actuating device (10) associated with an electric motor (M), especially a fan regulator (12) of a motor vehicle, the temperature limitation being c... | 06/18/2009 |
| 20090102405 | 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 inverter having a plurality of switching elements, the inverter receiving t... | 04/23/2009 |
| 20090088294 | 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 limited based on the temperature conditions.... | 04/02/2009 |
| 20090051307 | 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 semiconductor element for large electric power; an electric current detecting s... | 02/26/2009 |
| 20090021204 | METHOD AND APPARATUS FOR THERMAL SENSING IN AN ELECTRICALLY COMMUTATED MOTOR A control circuit for a motor includes a voltage regulator having a thermal shutdown apparatus that turns off the voltage regulator while retaining power to a micro-controller preventing an automatic restart of the motor absent a recycling of power when the temperature ... | 01/22/2009 |
| 20090001915 | 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 determining a speed of the electric motor and modifying the gate voltage based on ... | 01/01/2009 |
| 20080315815 | CONTROL DEVICE AND CONTROL METHOD A control device for controlling a recovery from a locking of a motor includes: a switching unit which supplies a motor current from a current supplying unit to the motor; and a driving control unit which supplies a PWM control signal to the switching unit to control a ... | 12/25/2008 |
| 20080094762 | Power Supply Apparatus With Function of Detecting Abnormality of Current Sensor A current detector (60) samples a motor current (MCRT_A) from a controlling sensor and a motor current (MCRT_B) from a monitoring sensor, and holds respective motor current maximum values (MCRT_Amax, MCRT_Bmax) at each prescribed operation cycle. An abnormality d... | 04/24/2008 |
| 20080074068 | Brushless motor The brushless motor includes a coil array, a magnet array, a magnetic sensor, a drive control circuit for driving the coil array, and a temperature sensor for detecting a detection target temperature associated with either the coil temperature or the driving element tem... | 03/27/2008 |
| 20070132416 | 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 gradually reduce the controlled pressure. If the temperature continu... | 06/14/2007 |
