What is the PWM high-frequency switching power supply
PWM is pulse width modulation
As mentioned above, through the high-frequency switch output a pulsating DC, the filter output stable DC
If the load changes will lead to changes in the output voltage then the system will adjust the output pulsating DC duty cycle to achieve the purpose of regulation.
Upstairs that is the working principle of PWM-type inverter. What I'm talking about is switching power supply. Is actually a principle.
That is, the DC power to a high-frequency chopping to a pulse when the pulse is not broken when the wave will be able to get such a smooth waveform, such as sine wave
Through the control of the pulse width in order to achieve the size of the output power control, such as sine wave peak width of the widest width and smaller pulse width when the narrow
PWM-type high-frequency switching power supply is the use of pulse width modulation (PWM), referred to as pulse width modulation, is the use of microprocessor digital output to control the analog circuit is a very effective technology, widely used in measurement, communication Power control and transformation in many areas of power.
PWM switch regulator or steady current power supply basic working principle is in the input voltage changes, internal parameters change, external load changes in the case, the control circuit through the control signal and the difference between the reference signal closed-loop feedback, adjust the main circuit switching device Of the conduction pulse width, making the switching power supply output voltage or current control signal is stable.
