Chopper frequency is given by
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In pulse-width modulation the switches are turned on at a constant chopping frequency. The total time period of one cycle of output waveform is constant. The average output voltage is directly proportional to the ON time of chopper. The ratio of ON time to total time is defined as duty cycle.
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in pulse width modulation the switches are turned on at a constant stopping frequency the total time period of one cycle of output waveform is constant average output voltage is directly proportional to the open time of chopper
the the ratio of on time to total time is defined as
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