SPWM is a set of constant amplitude but unconstant width rectangular serial pulse produced by control return circuit to approximate sinusoidal voltage waves.
(正弦脉宽调制)是由控制回路产生一组等幅而不等宽的矩形脉冲列，用来近似正弦电压波。
The structure substituted rectangular prism for common quarter wave, and improved the stability of the optical voltage transformer.
该结构用直角棱镜代替了普通的四分之一波片，提高了光学电压互感器的稳定性。
The machine directly winds the primary coil on the rectangular enclosed voltage transformer core, which is originated by our institute.
该机可在矩形封闭的电压互感器铁芯上直接绕制一次线圈，为我所之首创。
Thus, the AC motor control device can suppress generation of an offset current when performing the rectangular wave voltage control.
由此，在进行矩形波电压控制时能够抑制失调电流的产生。
Because the clamp effect of DC voltage source, AC side output the rectangular wave voltage waveform, and it has nothing to do with the load impedance Angle.
由于直流电压源的钳位作用，交流侧输出电压波形为矩形波，并且与负载阻抗角无关。
The source generates a rectangular wave voltage according to a first control, and applies the voltage to at least one organic electroluminescent element, thereby driving the element.
方波电压源，根据第一控制产生方波电压且将所述电压施加在至少一个有机电致发光元件上，以驱动所述元件；
The source generates a rectangular wave voltage according to a first control, and applies the voltage to at least one organic electroluminescent element, thereby driving the element.
方波电压源，根据第一控制产生方波电压且将所述电压施加在至少一个有机电致发光元件上，以驱动所述元件；
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