How a digital controller with pwm can be employed

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Reference no: EM131393291

Typically, when a digital transducer is employed to generate the feedback signal for an analog controller, a digital-to-analog converter (DAC) would be needed to convert the digital output from the transducer into a continuous (analog) signal. Similarly, when a digital controller is used to drive an analog process, a DAC has to be used to convert the digital output from the controller into the analog drive signal. There exist ways, however, to eliminate the need for a DAC in these two types of situations.

a. Show how a shaft encoder and a frequency-to-voltage converter can replace an analog tachometer in an analog speed-control loop.

b. Show how a digital controller with PWM can be employed to drive a dc motor without the use of a DAC.

Reference no: EM131393291

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