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LED display 300W dc to ac 220v 230v 240v pure sine wave power inverter
268/5000
The function of the inverter is to convert direct current into
alternating current, it is composed of inverter bridge, SPWM wave
module! Drive module and filter circuit, SPWM inverter circuit is
the key to generate pure sine wave. The generation of SPWM wave
module has always been a research focus. SPWM is the pulse width
modulation technology, which is also the pulse waveform with
variable duty cycle. PWM control technology is based on this
conclusion. The semiconductor switching device on and off control,
so that the output end of a series of equal amplitude and width of
the pulse is not equal! To obtain the required waveform equivalent,
when performing pulse width modulation! If the duty cycle of pulse
series is arranged according to sinusoidal law, then the output
voltage can be filtered to get sinusoidal waveform! At the same
time, the harmonic component of load current is greatly reduced,
which is called sinusoidal pulse width modulation.