5. Answer the following questions briefly. (a) discuss the advantages and disadv

Question

5. Answer the following questions briefly. (a) discuss the advantages and disadvantages of potentiometers compared with o encoders (b) The rotary resolver has two outputs. Vol-a V sin ut sin and Vo2-a V sin' When is it enough to use one output only and when is it required to use outputs! (c) How does the piezoelectric accelerometer work? (d) What is the difference between incremental and absolute optical encoders? (e) Discuss the advantages and disadvantages of the brushless DC motor comp with the conventional DC motor (f) Discuss the advantages and disadvantages of AC motors compared with the ventional DC motor (g) Give examples of applications where each of the following actuators is prefe i. Hydraulic actuator ii. Pneumatic actuator iii. DC servomotoir iv. Stepper motor

Explanation / Answer

a) Advantages of Potentionemeter is that the easy of implementation is very trivial.

Disadvantage is that they are dependent on the ambient temperature as resistance varies with varying temperature.

b)The question is not visible fully

c)Piezo crystals worked based on energy conversion principle. They convert mechanical to electrical energy

d)Incremental optical encoders have outputs in incremental steps as they are rotated in one direction the value increases.

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