Method and device for controlling brushless d. c. motor

Application Number: 00108374
Application Date: 2000.05.12
Publication Number: 1274194
Publication Date: 2000.11.22
Priority Information: 1999/5/14 IT TO99A000399
International: H02P6/08;H02P6/18
Applicant(s) Name: L. G. L. Electronis S. P. A.
Inventor(s) Name: P. Zeniro;G. Pedrini;L. Goti
Patent Agency Code: 31100
Patent Agent: hong ling
Abstract The method consists in determining the angular positions of the rotor, which are useful for switching the phase currents (Ia-b-c), by deducing them from the sampled reading of the phase voltages (Va-Vb-Vc), and in measuring the current of each phase by deriving it from the detection of the voltage (Vs) that is present across a shunt resistor (RS) inserted on the negative power supply conductor of the three-phase star bridge (PO) of the driving inverter that generates the set of three phase voltages (Va-Vb-Vc) supplied to the motor.