Electricity: motor control systems inventions 06/09

20090162038 - Motor characteristics acquiring apparatus, control apparatus using the acquired motor characteristics, and power window control apparatus: The rotation period of a motor is subdivided by edge interval times and a rate of change between a currently calculated edge interval time and an edge interval time calculated one rotation of the motor previously is calculated at the detection of each edge. Then the rotation period of the... Agent: Schwabe, Williamson & Wyatt, P.C. Pacwest Center, Suite 1900

20090162039 - Circuit for controlling rotation speed of computer fan: A circuit for controlling rotation speed of a computer fan includes a fan connector providing for controlling the rotation speed of the computer fan, a rotation speed detector providing for detecting the rotation speed of the computer fan, a BIOS chip connected to the fan connector via the rotation speed... Agent: PCe Industry, Inc. Att. Steven Reiss

20090154905 - Single output h-bridge drive: Disclosed is a drive circuit for generating the drive current used to energize the windings of a motor. The drive circuit includes a data processing unit that produces two outputs used to control an H-bridge and generation of the drive current. One output, a commutation signal, controls the timing of... Agent: Townsend And Townsend And Crew, LLP

20090154906 - System and method for controlling multiple dc fans: A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common processor for centrally controlling the speeds of... Agent: Townsend And Townsend And Crew, LLP

20090148138 - Method for controlling an electric motor by using the pwm technique: A method for controlling an electric motor by using the PWM technique; the control method includes the steps of: applying to the clamps of the electric motor an electric voltage varying in time, which displays a square waveform and consists of a sequence of pulses having a uniform wave period... Agent: Davidson Berquist Jackson & Gowdey LLP

20090148139 - Method of operating drill with solid state speed control: A method of operating a hand power tool in one embodiment includes generating a variable speed control signal with a solid state switch that corresponds to a selected speed for a motor, generating a pulse width modulated (PWM) signal corresponding to the variable speed control signal, generating H-bridge driving signals... Agent: Maginot, Moore & Beck, LLP Chase Tower

20090148140 - Electronic device for regulating the voltage across a high-side load: The invention relates to an electronic control device for regulating the voltage across a high-side load, especially for regulating a fan in a motor vehicle, with a control voltage (V1) which is referenced to system ground and which is mirrored to the positive high-side supply voltage, wherein the control voltage... Agent: Walter A. Hackler Patent Law Office