Electricity: motor control systems inventions 07/08

20080181586 - Fan rotation speed control circuit of power supply system: A fan rotation speed control circuit of a power supply system is provided, which is applicable for controlling the rotation speed of the fan according to a loading state outputted by the power supply system. The fan rotation speed control circuit of the power supply system includes a waveform generating... Agent: Rabin & Berdo, PC

20080175570 - General purpose 100% solid state drive for direct current rotary machines: General purpose 100% solid state Direct Current drive for rotary DC machines with four quadrants operation. It is to say that allows the rotary DC machine to act like motor or generator in the two direction of possible rotation. In the first and third quadrant as motor in both direction... Agent: Law Office Of Morris E. Cohen

20080170841 - Medical handle: A medical handle comprises a drive unit and a control device or circuit for driving a medical tool. The control device or circuit comprises a control and/or regulating circuit for controlling and/or regulating the drive unit, the drive unit comprises at least one magnetic element and a sensor system for... Agent: Klarquist Sparkman, LLP

20080166109 - Device and method of driving bldc motor and increasing driving speed of bldc motor: Disclosed herein are a device and method of driving a brushless DC (BLDC) motor. The device to drive the BLDC motor includes a rectifier which converts an AC voltage into a DC voltage; an inverter which converts the DC voltage into an AC voltage by switching a plurality of power... Agent: Staas & Halsey LLP

20080166110 - Fan driving circuit: A fan driving circuit includes a digital-analog converting circuit (10), an amplifier circuit (40), and a controlling circuit (50). The digital-analog converting circuit receives a digital signal from a controlling integrated circuit (IC), and outputs an analog signal. The amplifier circuit receives the analog signal from the digital-analog converting circuit,... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang