Electricity: motor control systems inventions 11/07

20070274692 - Motor driving circuit: According to some preferred embodiments of the present invention, a motor driving circuit includes a phase detection circuit configured to detect a rotation phase of a motor and output a phase detection signal, a first amplifier configured to amplify the phase detection signal and output an amplified detection signal, and... Agent: Watchstone P+d, PLC

20070274693 - Systems and methods for regulating power in a medical device: A system for controlling a motor for use in a ventilation system may include a motor, a voltage adjustment system, a user interface, and a motor controller. The voltage adjustment system may be configured to adjust a voltage applied to the motor. The user interface may be configured to receive... Agent: Baker Botts L.L.P. Patent Department

20070274694 - Fan motor control method and device thereof: A fan motor control device comprises a clock signal generator and a drive unit. The clock signal generator generates a low-frequency clock signal. A frequency of low-frequency clock signal is less than 23 KHz. The drive unit converts the low-frequency clock signal to a high-frequency drive signal and outputs the... Agent: Birch Stewart Kolasch & Birch

20070274695 - Automotive universal latch control implementation: Latch control methods and systems are disclosed, including a latch that receives power from a motor associated with an H-bridge circuit. A sensor can be provided for monitoring the latch, wherein the sensor obtains latch feedback data from the latch. A microcontroller controls the latch based on the latch feedback... Agent: Dickstein Shapiro LLP

20070263992 - Motor driving apparatus: There is provided a motor driving apparatus in which variations in individual circuit constants have a small effect even when a drive current is small. An error amplifier circuit amplifies a difference between a current detection signal showing a current value of a drive current that flows in the motor... Agent: Ratnerprestia

20070253685 - Quiet fan speed control: A novel a circuit for driving a fan includes an output terminal for supplying the fan with drive power, a pulse width modulation driver, and a limiter. A first power terminal of the fan is held at a first voltage (e.g., 0V), and a second power terminal of the fan... Agent: Henneman & Associates, PLC