What is the PWM

Pulse width modulation (PWM) is a very effective technique for the control of analog circuits based on the digital output of microprocessors, it is widely used in many fields, such as measurement, communication, power control and transformation
Pulse width modulation is an analog control mode, according to the corresponding changes in the load to the base of the transistor bias modulation or MOS tube grid, to achieve a transistor or MOS tube turn-on time of change, so as to realize the switching power supply output change. In this way, the output voltage of the power supply can be kept constant when the working condition is changed. It is a very effective technique to control the analog circuit by the digital signal of the microprocessor.
With the advantages of simple control, flexible and dynamic response, PWM control technology has become the most widely used control method of power electronics technology, and it is also the focus of research. Because of the development of science and technology, there is no boundary between disciplines, and the combination of modern control theory or the realization of non resonant wave switching technology will become one of the main development directions of the PWM control technology. According to the change of the corresponding load, the bias of the transistor base or the MOS tube grid is modulated to realize the change of the turn-on time of the transistor or the MOS tube, so as to realize the change of the output of the switching voltage stabilized power supply. In this way, the output voltage of the power supply can be kept constant when the working condition is changed. It is a very effective technique to control the analog circuit by the digital signal of the microprocessor.

SSP3111C 1-2KVA Modified Sine Wave Solar Power Inverter For Home With PWM Solar Charge Controller

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