公开(公告)号：US07573218B2

公开(公告)日：2009-08-11

申请号：US11738527

申请日：2007-04-23

Applicant: Hsing-Cheng Yu ,  Hsing-Yu Lin ,  Shir-Kuan Lin ,  Shyh-Jier Wang

Inventor： Hsing-Cheng Yu ,  Hsing-Yu Lin ,  Shir-Kuan Lin ,  Shyh-Jier Wang

IPC: H02P6/00

CPC classification number: H02P6/18 ,  H02P6/15

Abstract: A sensorless driving method for a brushless DC motor is provided. The time for the motor to rotate an electrical angle 60° is obtained by alternatively counting the occurrences of zero crossings with two counters and comparing the counted values, and the motor is delayed an electrical angle of 30°, by which a precise commutating time is obtained. The driving method provides a mask-based phase shift digital detection mechanism for effectively detecting true zero-crossing points. The driving method further provides an inhabitation mechanism with the function of soft-switch for inhibiting noise caused by transistor switching. By using these two counters, the time for the motor to rotate two electrical angles 30°−Δθ and 30°+Δθ are obtained and stored in two registers. The time period before and after the commutating point is added into a pulse width modulation (PWM) signal to reduce the noise and vibration.

Abstract translation: 提供一种无刷直流电动机的无传感器驱动方法。 电动机旋转电角度为60°的时间是通过交替地计数与两个计数器的零交叉出现并比较计数值而得到的，并且电动机的电角度延迟30°，精确的换向时间 获得。 驱动方法提供了一种用于有效检测真实过零点的基于掩模的相移数字检测机构。 该驱动方法还提供了一种具有软开关功能的抑制机制，用于抑制由晶体管切换引起的噪声。 通过使用这两个计数器，电机旋转两个电角度30° - 电压和30°+ Deltatheta的时间获得并存储在两个寄存器中。 整流点前后的时间周期被加到脉冲宽度调制（PWM）信号中以减少噪声和振动。

公开(公告)号：US20080252241A1

公开(公告)日：2008-10-16

申请号：US11738527

申请日：2007-04-23

Applicant: Hsing-Cheng Yu ,  Hsing-Yu Lin ,  Shir-Kuan Lin ,  Shyh-Jier Wang

Inventor： Hsing-Cheng Yu ,  Hsing-Yu Lin ,  Shir-Kuan Lin ,  Shyh-Jier Wang

IPC: H02P6/14 ,  H02P7/06

CPC classification number: H02P6/18 ,  H02P6/15

Abstract: A sensorless driving method for a brushless DC motor is provided. The time for the motor to rotate an electrical angle 60° is obtained by alternatively counting the occurrences of zero crossings with two counters and comparing the counted values, and the motor is delayed an electrical angle of 30°, by which a precise commutating time is obtained. The driving method provides a mask-based phase shift digital detection mechanism for effectively detecting true zero-crossing points. The driving method further provides an inhabitation mechanism with the function of soft-switch for inhibiting noise caused by transistor switching. By using these two counters, the time for the motor to rotate two electrical angles 30°−Δθ and 30°+Δθ are obtained and stored in two registers. The time period before and after the commutating point is added into a pulse width modulation (PWM) signal to reduce the noise and vibration.

Abstract translation: 提供一种无刷直流电动机的无传感器驱动方法。 电动机旋转电角度为60°的时间是通过交替地计算与两个计数器的零交叉出现并比较计数值而得到的，并且电动机的电角度延迟30°，精确的换向时间 获得。 驱动方法提供了一种用于有效检测真实过零点的基于掩模的相移数字检测机构。 该驱动方法还提供了一种具有软开关功能的抑制机制，用于抑制由晶体管切换引起的噪声。 通过使用这两个计数器，电机旋转两个电角度30° - 电压和30°+ Deltatheta的时间获得并存储在两个寄存器中。 整流点前后的时间周期被加到脉冲宽度调制（PWM）信号中以减少噪声和振动。