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| Number | Title | Issue Date |
| 7443122 | Electric drivetrain thermal protection system An electric drivetrain for a mobile machine is disclosed. The electric drivetrain has at least one power consuming device, a sensor associated with the at least one power consuming device, and a controller in communication with the power consuming device and the sen... | 10/28/2008 |
| 7414375 | Fan voltage regulation control device A fan voltage regulation control device includes a voltage regulation control unit for providing the power to a heat-dispersing fan, wherein the voltage regulation control unit is connected to a temperature detecting element and a voltage detecting unit. The tempera... | 08/19/2008 |
| 7394215 | Thermal control variable-speed circuit without switching noise A thermal control variable-speed circuit without switching noise is connected with a driving circuit, which controls the rotation speed of a fan motor using a driving voltage. The thermal control variable-speed circuit includes a reference voltage output circuit and... | 07/01/2008 |
| 7355362 | Power supply with performance display A power supply with performance display is disclosed. The computer power supply mainly has a power converter, a control module, and a display. The control module receives and processes the operating signals from the power converter, and then sends those processed si... | 04/08/2008 |
| 7327115 | Stepping motor control apparatus, stepping motor control method, and stepping motor control program product There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and a stop circuit to stop an operation of... | 02/05/2008 |
| 7312593 | Thermal regulation of AC drive An apparatus for the thermal regulation of an AC drive for providing power to a motor includes a temperature sensor producing a signal indicative of temperature, a heater resistor connectable across a DC link of the AC drive, and a first switch. A controller is oper... | 12/25/2007 |
| 7291995 | Air fan rotation speed control method and structure thereof An air fan rotation speed control method and a structure thereof aim to provide an automatic control mode and a manual control mode at the same time to control rotation speed regulation of an air fan to achieve instant heat dissipation for an environment and reduce ... | 11/06/2007 |
| 7271561 | Fan module and control device thereof Fan module and control device thereof. The fan module comprises a plurality of fans and the control device. The control device comprises a temperature sensing circuit, and a driving circuit. The temperature sensing circuit detects an ambient temperature of the fans ... | 09/18/2007 |
| 7248006 | Electronically controlled electric motor A system for controlling an electric motor comprises, in one embodiment, an encoder; a central processor in communication with said encoder; a module processor in communication with said central processor; feedback circuitry in communication with said module process... | 07/24/2007 |
| 7205740 | Fan control device for frequency converter A fan controlling device for a frequency converter, which is applied to a high-power frequency transforming system that installs fans according to the heat dissipating requirements and their switching operation, failure detection and control, and the fan controlling... | 04/17/2007 |
| 7199542 | Fan operation adaptive control system A fan operation adaptive control system is proposed, which is designed for use with an electronic system, such as a network server, for providing the network server with an adaptive operation control function; and which is characterized by the utilization of a CPLD ... | 04/03/2007 |
| 7166978 | Motor temperature sensor system and method to determine motor performance An electric motor system includes an electric motor, a temperature sensor mounted therein capable of measuring a local temperature and generating a temperature related signal, and a processor configured to calculate an actual temperature of a rotor magnet from the t... | 01/23/2007 |
| 7148643 | Driving a single-phase motor A single-phase motor driving circuit includes a controller for outputting a control signal to drive a single-phase motor in a period in which a saw-tooth voltage of a predetermined cycle is larger than a duty setting voltage based on a result of comparing a detected... | 12/12/2006 |
| 7141953 | Methods and apparatus for optimal voltage and frequency control of thermally limited systems Methods, apparatus, and articles of manufacture control a device or system that has an operational limit related to the rate or frequency of operation. The frequency of operation is controlled at a variable rate calculated to maximize the system or apparatus perform... | 11/28/2006 |
| 7102308 | Method and system for a variable speed fan control for thermal management A method and system for variable speed fan control for thermal management of a device includes disposing a first temperature sensor proximate a variable speed fan to measure an air temperature of inlet air Tair that cools the device by convection air flow... | 09/05/2006 |
| 7038408 | Fan motor speed control circuit A fan motor speed control circuit includes a driving circuit, a voltage division circuit, and a speed modulator. The voltage division circuit has a first transistor and a plurality of resistors and is connected between a voltage source and the driving circuit. The s... | 05/02/2006 |
| 7027721 | Temperature-rated variable speed control circuit of an electric fan An electric fan temperature-rated variable speed control circuit, includes a D.C. current source and fan activation IC. There are, between the current source positive and negative poles serially connected transistor, regulation tube, with the regulation tube negativ... | 04/11/2006 |
| 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. To measure temperature, the resistance of the VCM winding is measure... | 02/28/2006 |
| 6992448 | Motor control apparatus A motor control apparatus capable of protecting a motor from overheat while changing smoothly a motor output characteristic as a function of time lapse and mitigating overhead involved in arithmetic operation includes a current command value generator for generating... | 01/31/2006 |
| 6970643 | Radiator having a fan in variable rotation speed A radiator includes a voltage regulator for providing a reference voltage, a fan including a power end connected to the reference voltage via a first resistor and a feedback end for outputting a pulse signal indicating the rotation speed of the fan, an integration c... | 11/29/2005 |
| 6959936 | Vehicle suspension system A vehicle suspension system couples an axle to a vehicle frame so that the axle pivots about a first location with respect to the frame when the axle has a first range of articulation. The axle pivots about a second location with respect to the frame extending later... | 11/01/2005 |
| 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 permit switching operation in response to detection of abnormal heat... | 08/09/2005 |
| 6911793 | Operating procedure and cooling system mechanism for the motor of an electric powered tool An operating procedure for the motor (1) of an electric powered tool. The operating idle speed of the motor (1) is set to a value using regulator electronics (4), and the operating speed is the same as a chosen operating speed (n1). T... | 06/28/2005 |
| 6900607 | Combined feedforward and feedback parameter estimation for electric machines A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller responsive to at least one of: a current sensor, and a temperature sensor. Where the controller executes a parameter estimation proce... | 05/31/2005 |
| 6891347 | Cooling fan control based on cabinet intrusion Various systems and methods are provided for cooling a cabinet. In one embodiment, a method is provided that comprises the steps of controlling a speed of the at least one cooling fan in response to a temperature of the cabinet, and, controlling the speed of the at ... | 05/10/2005 |
| 6886977 | Measuring temperature in stationary components of electrical machines using fiber optics A sensor measures temperature in stationary components of electrical machines using fiber optics. An optical fiber is embedded in a non-metallic ribbon. Notches are cut in the ribbon to effect bends that accommodate a shape of a stationary component. The ribbon and ... | 05/03/2005 |
| 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 receiving and processing system input signals, strategies for: determ... | 03/01/2005 |
| 6810202 | Apparatus for controlling rotational speed of motor An apparatus for controlling a rotational speed of a motor, coupled to a sensing unit capable of outputting a sensing signal. The apparatus includes a controlling unit, coupled to the sensing unit, for outputting a controlling signal according to the sensing signal ... | 10/26/2004 |
| 6794843 | Ventilator having a muting device A ventilator having a muting device includes a central processing unit, and a fan motor. The fan motor is connected to a start capacitor which is electrically connected to a temperature sensing circuit which is electrically connected to the central processing unit, ... | 09/21/2004 |
| 6674260 | DC motor control A method of controlling a DC motor is presented. In a tracking action, an input to the motor is tracked. In a comparing action, the input is compared against a baseline value. In an adjusting action, a usage of the motor is adjusted when the input passes ... | 01/06/2004 |
| 6617815 | Fan control circuit The invention relates to a motor control circuit for a computer system fan motor, comprising a temperature sensor, a sensor amplifier, a fan command for applying a voltage to the fan motor according to the output of the sensor amplifier, and feedback cont... | 09/09/2003 |
| 6548981 | Actuator In the actuator device, there are provided the control means to control the rotation of the rotor axis via the driving means in the housing, the rotor axis rotation displacement detection means for detecting the rotation displacement of the rotor axis in ... | 04/15/2003 |
| 6515447 | Fan motor with variable frequency/constant speed control A fan motor with variable frequency/constant speed control comprises a frequency comparator, a differential integrating circuit, and a differential amplifier. The frequency comparator calculates a frequency difference between a frequency of an external pu... | 02/04/2003 |
| 6507162 | Motor for moving a flap of a heating, ventilation and/or air conditioning installation of a motor vehicle, with improved control A motor for moving a flap for distributing a flow of air in a duct of a heating, ventilation and/or air conditioning installation is supplied with voltage. A power-regulation module is mounted in series with the motor, and includes at least one positive-t... | 01/14/2003 |
| 6465978 | Dynamic motor drive torque control based on power switching device temperature feedback A circuit and method for permitting uninterrupted operation of a motor, even in the event of an over temperature condition, by dynamically controlling the motor torque based on the temperature of switching devices in the motor controller circuit. The circ... | 10/15/2002 |
| 6407525 | Thermal control variable speed fan motor A thermal control variable speed fan motor comprises a rectifying circuit, a differential amplifier, and a temperature-sensing circuit. The rectifying circuit converts a speed signal detected from the fan into a voltage that is outputted to a negative ter... | 06/18/2002 |
| 6354805 | Method for regulating a delivery variable of a pump In a known method for regulating a delivery variable of a pump, which is driven by an electric motor operated with alternating current of variable frequency, especially via a converter, the input power of the motor is measured as the actual value for the ... | 03/12/2002 |
| 6345399 | Hard mask process to prevent surface roughness for selective dielectric etching The propagation of microfissures from a photoresist to an underlying material layer during lithography and etching can be substantially prevented by placing a hard mask between the photoresist and the material layer to be etched. Specifically, the microfi... | 02/12/2002 |
| 6337949 | System for controlling an electric motor of a fan associated with heat exchangers in a motor vehicle The system comprises a pressure sensor for providing a signal indicative of the pressure of the refrigerant fluid of the air-conditioning system at the output or delivery of the compressor of the system, a sensor for detecting the temperature of the liqui... | 01/08/2002 |
| 6326753 | Controller of electric power-steering system A controller of an electric power steering system corrects a motor current command value by using a temperature of a motor, and compensates a variation in a motor current characteristic in accordance with a variation in the temperature. The controller inc... | 12/04/2001 |
