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- เผยแพร่เมื่อ 27 ส.ค. 2024
- #ElectroTechCC #SPWM #Inverter
The term SPWM stands for “Sinusoidal pulse width modulation” is a technique of pulse width modulation used in inverters. An inverter generates an output of AC voltage from an input of DC with the help of switching circuits to reproduce a sine wave by generating one or more square pulses of voltage per half cycle. If the size of the pulses is adjusted, the output is said to be pulse width modulated. With this modulation, some pulses are produced per half cycle. The pulses close to the ends of the half cycle are constantly narrower than the pulses close to the center of the half cycle such that the pulse widths are comparative to the equivalent amplitude of a sine wave at that part of the cycle. To change the efficient output voltage, the widths of all pulses are amplified or reduced while keeping the sinusoidal proportionality. With PWM (pulse width modulation), only the on-time of the pulses are changed during the amplitudes.
Sine Pulse Width Modulation
The hardware and software requirements of the sine pulse width modulation (SPWM) includes 8051 series Microcontroller, MOSFET, Gate Driver, Crystal Oscillator, Toggle Switches, Resistors, Capacitors, Required Diodes, Transformer, Regulator, Opto-isolators, Keil compiler, and Languages: Embedded C or Assembly.
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Sir what will be the freq range of low pass filter
Not that bad