There are many applications where it is necessary for a motor to maintain a cons

Question

There are many applications where it is necessary for a motor to maintain a constant speed, regardless of variations in load torque. These include products such as blenders, electric drills, electric cars, sewing machines, etc. The most accurate way to do this is to use a separate sensor to measure the actual speed of the motor in conjunction with a negative feedback circuit to control the applied voltage. However, if we're clever and careful, we can use a DC motor to measure its own speed and make appropriate adjustments. The following circuit shows one way to do this. Show that if the proper value of R3 is chosen, the motor will maintain a constant angular velocity: omega = K1 vms regardless of the load torque. What is the proper value of R3? What value of K1 results? Draw the Thevenin equivalent of the circuit seen by the motor. What will happen if R3 is smaller than the chosen value? Larger?

Explanation / Answer

a) R is unifom b)105 ohm c)remove voltage source then u will get required form

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