Hello Esteemed Colleagues,

While the term "overshoot" is employed across various industries and sectors, our examination is oriented specifically towards motor speed control systems (VFD).

Overshoot can be defined as deviating from the target, exceeding the set limits of revolution or current/voltage. An inverter is another expression for a "speed control device" and is used for controlling the speed of electric motors. In drive systems, the term "overshooting" generally denotes situations where the desired target value in a system is exceeded. For example, if you want to set a motor's speed to a specific value, if the control system is not properly designed, the motor speed can surpass the desired value (overshoot) before returning to the intended target.

This scenario can lead to system instability, performance losses, and in some cases, equipment damage. Consequently, control engineers often employ control strategies like PID controllers (Proportional, Integral, Derivative) to minimize such overshooting incidents. These controllers are designed to balance system dynamics and reach the desired target value swiftly and steadily.

Let us delve a bit deeper into the concept of "overshooting" in drive systems.

An inverter is a device that controls the speed of electric motors by altering the frequency of the power source. This can reduce the energy consumption of the motor and offer more flexible control over the motor.

Overshooting:

Overshooting occurs when a control system exceeds its target value in the process of reaching it. For instance, if we aim to achieve 1000 RPM in motor speed, initially, it might reach a higher value like 1100 RPM before settling at 1000 RPM. This results in overshoot or dampening in the response of the control system.

Reasons and Effects:

Overshooting usually stems from improperly adjusted control system parameters, leading to unwanted oscillations, delays, and decline in system performance. It can also cause increased stress on the equipment, potentially leading to premature failures.

Solution:

The solution to overshooting generally involves more careful adjustment of the control system. PID controllers are frequently used to resolve such problems. They correct system response using Proportional (P), Integral (I), and Derivative (D) control actions.

    P (Proportional): Acts proportionally to the error.
    I (Integral): Acts proportionally to the integration of the error over time.
    D (Derivative): Acts proportionally to the rate of change of error over time.

Correctly adjusting these parameters can minimize overshooting in control systems and enable the system to reach the desired target value more quickly and stably.