Electricity: motor control systems inventions 02/08

20080050100 - Controller for dc brushless motor integrated with a high voltage control system: Taught herein is a controller for a direct current brushless motor connected to a high voltage control system, comprising a microprocessor and an input/output interface circuit connected between the high voltage control system and the microprocessor; wherein the input/output interface circuit is a step-down circuit for transforming a high voltage... Agent: Matthias Scholl

20080050099 - Universal brushless dc motor: The invention teaches a brushless DC motor, comprising a brushless DC motor unit and a controller unit, wherein the brushless DC motor unit comprises a stator assembly, a permanent magnet rotor assembly magnetically coupled with the stator assembly, an enclosure supporting the installation of stator assembly and the permanent magnet... Agent: Matthias Scholl

20080050101 - Electric fan device and method of driving electric fan device: An electric fan device includes a motor which drives an electric fan for a vehicle, a control switch which controls a motor current supplied to the motor, and a control unit which controls an on/off operation of the control switch with pulse-width modulation. The control unit outputs a PWM pulse... Agent: Sughrue-265550

20080044165 - Motor drive and cooler employing it: In a fan motor drive circuit which drives a motor based on a pulse-modulated external control signal, a temperature control signal generator generates a pulse-modulated temperature control signal whose duty ratio changes depending on temperature. A signal synthesizer synthesizes the external control signal and the temperature control signal by a... Agent: Cantor Colburn, LLP

20080037960 - Quenching device for a converter bridge with line regeneration: There is described a method for controlling a quenching device for a converter bridge with line regeneration, whereby the converter bridge controlled by a network-timed control circuit by ignition pulses is connected with its at least three inputs to the phases of a three-phase network and the at least two... Agent: Siemens Corporation Intellectual Property Department

20080037961 - System and method for switching control modes of spindle motor: A system and method of switching the control modes of spindle motor are described. The switch system comprises a first control module, a second control module and a switch controller. The first control module electrically coupled to the spindle motor and the OPU controls the spindle motor to be operated... Agent: Madson & Austin

20080037962 - Speed control system for a ceiling fan motor: The invention teaches a speed control system for a brushless DC motor for a ceiling fan, comprising a power circuit 1, a microprocessor circuit 2, a power drive circuit 3, a speed regulation circuit, and a brushless DC permanent magnetic motor 5, wherein the input terminal of the power circuit... Agent: Matthias Scholl