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| Number | Title | Issue Date |
| 7702223 | Circuit for controlling rotation speed of computer fan A circuit for controlling rotation speed of a computer fan includes a fan header for connecting to a 4-pin fan or a 3-pin fan, a jumper device, an amplifier, and a controller. The jumper device has a first pin for receiving a controlling signal, and connected to a f... | 04/20/2010 |
| 7436138 | Methods and systems for emulating an induction motor utilizing an electronically commutated motor A method for emulating induction motor operation using an electronically commutated motor (ECM) is described herein. The method includes receiving, at the ECM, a desired operating torque, accessing induction motor operating characteristics stored within the ECM, and... | 10/14/2008 |
| 7398412 | Measure controlled delay with duty cycle control The disclosed embodiments relate to circuits that produce synchronized output signals. More specifically, there is provided a synchronization circuit adapted to receive an input signal, the synchronization circuit comprising a delay monitor adapted to produce a dela... | 07/08/2008 |
| 7378810 | Method and apparatus for spindle motor control Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In some implementations, first and second signals indicative of BEMF of dif... | 05/27/2008 |
| 7368886 | Method of testing motor torque integrity in a hybrid electric vehicle A method of testing an electric motor that is adapted to provide a desired electric motor output torque to a vehicle powertrain system comprising an engine and the electric motor which are operatively and selectively coupled to a transmission. The method includes th... | 05/06/2008 |
| 7348757 | Circuit to improve motor phase current reconstruction via DC link Apparatus for reconstructing the phase currents of a multiphase load driven by a multiphase inverter fed by a DC link and controlled by a PWM controller, the apparatus including a sensor in the DC link, first and second sampling arrangements for sampling the current... | 03/25/2008 |
| 7317296 | Electric motor The electric motor is equipped with an electronic control, for example in the form of a frequency converter (2) and comprises at least one Seebeck element (6) whose one side is connected to the motor (1) in a heat-conducting manner and whose oth... | 01/08/2008 |
| 7282876 | System for driving brushless DC motor and method of driving same A brushless DC motor drive system includes a pole-position detector for detecting respective pole positions of permanent magnets of a rotor of a brushless DC motor. A present speed computing unit computes a present speed of the brushless DC motor on the basis of an ... | 10/16/2007 |
| 7245096 | Method and apparatus for controlling the speed of a DC motor A method and apparatus for controlling the speed of a DC electric motor receives a periodic commutation signal having a fixed duration on cycle and an off cycle. The commutation signal then is modified to form a periodic modified commutation signal having substantia... | 07/17/2007 |
| 7205733 | Self-startup circuit for DC fan A self-startup circuit for a DC fan includes a voltage sampling device receiving a first control signal, a comparator, and a self-startup device. The comparator includes two input terminals and an output terminal. One input terminal is connected to an output termina... | 04/17/2007 |
| 7166981 | Actuator, motor unit and controller unit An actuator, which allows a controller to be commonly applied to a plurality of models without requiring complicated setting operation of control parameters, and is superior in cost effectiveness, reusability and expandability, is provided. And further, a motor unit... | 01/23/2007 |
| 7109674 | Method and system for regulating the average electromagnetic torque of a rotating electrical machine, storage medium and data structure for carrying out the method A method is described for regulating the average electromagnetic torque of a polyphase rotating electrical machine, supplied with a polyphase voltage and a polyphase current that are generated by an inverter. The method comprises a step of controlling the machine, u... | 09/19/2006 |
| 7102314 | Brushless motor control apparatus having overheat protecting function A brushless motor control apparatus detects a phase current flowing in a brushless motor, converts the phase current to a vector current including a d-axis current of a magnetic flux direction component and a q-axis current of a torque direction component orthogonal... | 09/05/2006 |
| 7095188 | Serial fan set and rotation speed-matching curve generation method thereof A serial fan set and rotation speed-matching curve generation method thereof are provided. The serial fan set comprises a rotation speed control module, a first fan and a second fan, in which the rotation speed control module is used to receive the power signal and ... | 08/22/2006 |
| 7089128 | Control circuit of a DC fan motor for start with high voltage and high rotational speed with low voltage A control circuit of a DC fan motor for start with high voltage and high rotational speed with low voltage at least includes an input unit, an output unit, a control unit and a comparator. The input unit is connected to the comparison unit and the control unit for t... | 08/08/2006 |
| 7078871 | Method for determining the effective resistance of a DC motor and open loop voltage mode controlling of a DC motor A method for determining an effective resistance of a voltage controlled DC motor having a nominal resistance includes driving the DC motor with a signal so that the DC motor has a targeted acceleration, and sensing an effective acceleration of the DC motor. The eff... | 07/18/2006 |
| 7042176 | Vehicle The present invention concerns a motor vehicle comprising at least one electric motor, an energy storage device for providing drive energy for the electric motor, a plug connector connected to the energy storage device for connection to a current source and a contro... | 05/09/2006 |
| 6946815 | Switch for a variable-speed induction motor A switch for a variable-speed induction motor includes conductive connecting pieces, a rotary member, and a driving unit. The connecting pieces are mounted in a housing, are adapted to be connected to the induction motor, and have distal contact parts that surround ... | 09/20/2005 |
| 6912353 | Brushless DC ring motor cooling system A method of operating a cooling fan in a cooling system for a vehicle includes determining a required speed of the cooling fan. First and second signals are provided to a motor controller operatively connected to a motor having a rotatable portion connected to the c... | 06/28/2005 |
| 6895176 | Method and apparatus for controlling electronically commutated motor operating characteristics A permanent magnet DC brushless motor control assembly permits a user to select the permanent magnet DC brushless motor operating characteristics by selecting appropriate control circuits to interface with the motor. The assembly includes a permanent magnet DC brush... | 05/17/2005 |
| 6828748 | Speed control circuit for a brushless dc motor A speed control circuit for a brushless dc motor includes a motor drive circuit, a drive member and a PWM control circuit. The motor drive circuit includes at least one coil and at least one transistor serially connected to the coil. The drive member is provided wit... | 12/07/2004 |
| 6812658 | Drive unit A drive unit, in particular for a fan in motor vehicles, is indicated, comprising an electric motor (12) operated on a DC line (UBat), and comprising a device (13) for controlling the speed of the motor (12) by changing the operating ... | 11/02/2004 |
| 6775469 | Method of controlling an electronically commutatable motor An electronically commutatable motor having field windings activatable in sequence with a commutation frequency via semiconductor output stages using control signals connectable and disconnectable from a direct voltage supply, the control signals being clocked using... | 08/10/2004 |
| 6771034 | Children's ride-on vehicle with electronic speed control A children's ride-on vehicle having an electronic speed controller adapted to regulate at least one of the timing and rate of application of a selected rotational input. The vehicle includes a body with a seat, a steering mechanism positioned for operation by a chil... | 08/03/2004 |
| 6654548 | Method and apparatus for controlling the speed of rotation of a direct current motor for model vehicles The invention relates to a method for control of the speed of rotation of a separately excited direct current motor for model vehicles, the speed of rotation of the motor being controlled by means of a pulse sequence, the motor being alternately supplied ... | 11/25/2003 |
| 5371445 | Switching device for controlling two electric motors at different speeds A system, which may be a cooling system for a motor vehicle engine, has two direct current motors together with switching circuits which provide selective connection of the windings of the two motors to a direct current voltage source in such a way as to ... | 12/06/1994 |
| 4952081 | Manual rotary sphere control of an electronic equipment with touch sensing of scale marks A sphere which may be rotationally displaced by manual action, protruding from a control panel, is mechanically connected for resolving its rotary motion into motions about two axes perpendicular to each other, for control of the direction and speed opera... | 08/28/1990 |
