Basics of Control Systems – IV | PID Controller | P, I, D, PI, PD & PID Control | Electric Vehicles | Lecture 30

Control systems play a crucial role in electric vehicles, electric drives, and power electronic systems, where accurate tracking, fast dynamic response, disturbance rejection, and low steady-state error are essential. In this lecture, we continue our study of Control Systems for Electric Vehicles by introducing different types of feedback controllers and understanding how each control action influences system performance.

The lecture begins with the Proportional (P) controller, explaining how proportional action provides an immediate response to the error but may leave a non-zero steady-state error. The effect of proportional gain on the system time constant, damping, transient response, and stability is also discussed.

The Integral (I) controller is then introduced to improve steady-state accuracy. Its ability to eliminate steady-state tracking error and reject constant disturbances is explained, followed by the PI controller, which combines the fast corrective action of proportional control with the steady-state accuracy provided by integral control.

The lecture further discusses Derivative (D) control, highlighting its anticipatory nature and its ability to respond to the rate of change of error. The limitations of derivative control, particularly its sensitivity to noise, are also explained.

Finally, the PID controller is introduced as a combination of proportional, integral, and derivative actions. The lecture explains how PID control provides multiple degrees of freedom for improving system dynamics, tracking performance, stability, and disturbance rejection.

Topics Covered

Proportional (P) Controller
Integral (I) Controller
Derivative (D) Controller
PI Controller
PD Controller
PID Controller
Controller Transfer Functions
Steady-State Error
Transient Response
Effect of Proportional Gain
Integral Action and Error Elimination
Derivative Action and Anticipatory Control
Disturbance Rejection
System Stability
Comparison of P, PI, PD and PID Controllers
Practical Control-System Examples
Application of Controllers in Electric Vehicles

Who Should Watch?

B.Tech. and M.Tech. students
Control Systems learners
Power Electronics and Electric Drive students
Electric Vehicle enthusiasts
GATE and ESE aspirants
Researchers working on EV control and electric drives
Engineers designing closed-loop control systems

Recommended References

K. Ogata, Modern Control Engineering, 5th Edition, Pearson.

N. S. Nise, Control Systems Engineering, Wiley.

R. C. Dorf and R. H. Bishop, Modern Control Systems, Pearson.

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