Patent ID: 9083273
Filing Date: 2015-07-14
Classification: H02P

Abstract:
1. A method for controlling a brushless direct current motor, comprising: generating a motor command signal during a commutation interval of said brushless direct current motor; and adjusting a common attribute of at least two non-zero pulses of said motor command signal such that said at least two non-zero pulses of said motor command signal are not uniform; further comprising a third non-zero pulse during said commutation interval, said third non-zero pulse produced after said second pulse, said third non-zero pulse having a shorter duration high level pulse width than said second pulse; wherein a position of said brushless direct current motor is converted into a time segment counter signal, and wherein said time segment counter signal is modified by a correction and converted to an analog signal; wherein said analog signal is multiplied by a speed control adjustment and compared to an oscillating signal before being output to said brushless direct current motor; and wherein said common attribute is a pulse width or a pulse amplitude.