Electricity: motor control systems inventions 07/07

20070166016 - Controller for dc motor: A first determining section determines whether a recording medium is conveyed in a first direction. A setting section sets a first current value as a current initially outputted to a DC motor each time the first determining section determines that the recording medium is conveyed in the first direction. A... Agent: Baker Botts LLP C/o Intellectual Property Department

20070160352 - Apparatus and method compensating recurring false speed errors in dc motor and disk drive adopting same: Provided are an apparatus and method of controlling a motor by compensating for recurring false speed errors generated in a direct current (DC) motor. The apparatus includes a learning control unit adapted to calculate recurring false speed errors related to a mechanical tolerance associated with the motor in each one... Agent: Volentine Francos, & Whitt PLLC

20070160353 - Drill with solid state speed control and method of operating: A power tool includes solid-state motor control. The tool includes a solid state variable speed control signal generator for generating a variable speed control signal, a microcontroller for generating a pulse width modulated (PWM) signal corresponding to the variable speed control signal, a driver circuit for generating H-bridge driving signals... Agent: Maginot, Moore & Beck, LLP Chase Tower

20070160354 - Motor control circuit: A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a square wave with a sequence of alternating on-time and off-time. The waveform-shaping... Agent: Birch Stewart Kolasch & Birch

20070154192 - Surgical machine and method for controlling and/or regulating a surgical machine: To improve a surgical machine with a sensorless electric motor comprising a rotor and at least two motor windings, and with a motor controller for controlling and/or regulating the electric motor, so that the electric motor is operable with optimum efficiency at low rotational speeds and a starting of the... Agent: Lipsitz & Mcallister, LLC