Electricity: motor control systems inventions 09/08

20080232786 - Method for supplying electrical power to a dc motor which can be commutated electronically via a semiconductor power output stage: A method is proposed for supplying electrical power to a DC motor (16) which can be commutated electronically via a semiconductor power output stage (28), preferably a three-phase DC motor, through which a control unit (22) passes current in blocks, corresponding to the signals from a rotor position sensor (20).... Agent: Michael Best & Friedrich LLP

20080226266 - Control apparatus for and control method of controlling motor for vehicle: The present invention is aimed at provision of a control apparatus for and a control method of controlling a motor for a vehicle driven by a driving circuit that operates according to a pulse width modulation (PWM) signal. Measurement of a duty of an output signal from the driving circuit... Agent: Crowell & Moring LLP Intellectual Property Group

20080219648 - Circuit and method for controlling the rotating speed of a bldc motor: A circuit and a method for controlling the rotating speed of a brushless direct current (BLDC) motor are provided, whose goal is solving the stall problem encountered by conventional BLDC motors driven by pulse width modulation (PWM). The circuit includes a closed-loop control mechanism for adjusting the duty cycle of... Agent: At&t Corp.

20080219649 - Motor drive device and electric apparatus using the same: A motor drive device of the present invention includes: an output circuit provided with a switch element connected to a motor; a PWM signal generating circuit for generating a PWM signal having a duty corresponding to a ratio between a power supply voltage applied to the motor and a predetermined... Agent: Fish & Richardson P.c.