Electricity: motor control systems inventions 07/09

20090190903 - Motor controller and vehicular steering system using said motor controller: A low speed region position estimating portion is designed to be suitable for when the motor is operating in a low speed region, and estimates a low speed estimated rotational position θ̂L. A high speed region position estimating portion is designed to be suitable for when the motor is operating... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090190904 - Optimized determination of the after-run voltage in dc motors: A device and a method are provided for determining the after-run voltage of a direct current motor which is operated via cycled control. In normal operation the direct current motor is controlled via PWM control and a first specifiable pulse/no-pulse ratio. An evaluation unit is provided for determining an after-run... Agent: Kenyon & Kenyon LLP

20090190905 - Regulator circuit for an electric motor, provided with a microprocessor: The invention relates to a regulator circuit for controlling the power fed to an electric motor from a voltage source, wherein the regulator circuit comprises a semiconductor switching element connected in series to the electric motor and the voltage source for the purpose of controlling the power fed to the... Agent: Demont & Breyer, LLC

20090190906 - Motor system with reduced common-mode noise: A motor system with reduced common-mode noise includes an AC power, a first transformer unit electrically connected to the AC power and providing a first DC power, and a second transformer unit electrically connected to the AC power and providing a second DC power. The first DC power is supplied... Agent: Hdls Patent & Trademark Services

20090175601 - Motor controller and motor control method: A motor controller calculates a motor torque command based on motor speed and causes a motor to generate a torque corresponding to the motor torque command, to drive a machine load coupled to the motor. The motor controller includes a speed compensator that makes, when a speed compensation torque is... Agent: Leydig Voit & Mayer, Ltd

20090175602 - 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 first power... Agent: PCe Industry, Inc. Att. Steven Reiss

20090169188 - Apparatus and method for fan auto-detection: An apparatus for detecting a type of fan and controlling the fan, the fan providing during operation a tachometer signal indicating a speed of the fan, the apparatus includes: a direct current (DC) generator for coupling to the fan and configured to provide a first voltage to the fan; a... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090169189 - Motor control apparatus: A motor control apparatus includes a fan motor, a hall IC, a first power generator, and a second power generator. The hall IC is coupled with the fan motor for detecting the status of the fan motor, such as rotating or stationary. The first power generator is connected with the... Agent: Rosenberg, Klein & Lee