公开(公告)号：US20030034747A1

公开(公告)日：2003-02-20

申请号：US09930148

申请日：2001-08-16

Applicant: PROLIFIC TECHNOLOGY INC.

Inventor： Chia-Chang Hsu ,  Chih-Shih Yang

IPC: H02P001/18 ,  H02P003/08 ,  H02P005/06 ,  H02P007/06 ,  H02K023/00

CPC classification number: H02P6/16 ,  H02P6/30

Abstract: A method for driving a brushless DC motor is disclosed in accordance with the present invention. Firstly, a driving control signal is generated based on sensed information of a motor rotor's magnetic field distribution. The driving control signal is inactive in the case that four rotor magnetic arcs are rotated more or less than critical positions of the rotor corresponding a stator. At that time, no magnetic fields are produced from the motor's stator, and thus the rotor rotates by inertial force. In another case, the driving control signal is issued in a conventional manner.

Abstract translation: 根据本发明公开了一种用于驱动无刷直流电动机的方法。 首先，基于电机转子的磁场分布的感测信息生成驱动控制信号。 在四个转子磁场转动或多或少地转动对应于定子的转子的情况下，驱动控制信号是无效的。 此时，电动机的定子不产生磁场，因此转子通过惯性力旋转。 在另一种情况下，以常规方式发出驱动控制信号。

公开(公告)号：US20020024399A1

公开(公告)日：2002-02-28

申请号：US09925424

申请日：2001-08-10

Applicant: PROLIFIC TECHNOLOGY INC.

Inventor： Chia-Chang Hsu ,  Chih-Shih Yang

IPC: H03K007/08

CPC classification number: H03K7/08 ,  H02P6/08

Abstract: A DC brushless motor operation speed control method is disclosed. First, a linearly voltage dependent current source is used to charge a capacitor and the terminal voltage of the capacitor is coupled to a linearly voltage dependent base frequency level detector. When the output voltage of the capacitor reaches the base frequency reference voltage, the signal output from the base frequency level detector will make the capacitor discharge, outputting a series of base frequency triangular waves. Under different supply voltages, all the generated base frequency triangular waves have the same cycle time. The base frequency triangular waves are transmitted to a speed control comparator. Through pulse width modulation, the speed control reference voltage adjusts the output pulse width of the comparator and thereby controls the speed of the motor.

Abstract translation: 公开了一种直流无刷电机运行速度控制方法。 首先，使用线性电压相关电流源对电容器充电，并且电容器的端子电压耦合到线性电压依赖的基极频率电平检测器。 当电容器的输出电压达到基准频率参考电压时，从基频电平检测器输出的信号将使电容放电，输出一系列基频三角波。 在不同的电源电压下，所有产生的基频三角波具有相同的周期时间。 基频三角波被传送到速度控制比较器。 通过脉宽调制，速度控制参考电压调节比较器的输出脉冲宽度，从而控制电机的转速。