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Question

What kind of noise is generated when the Servo System is used? Also what kind of noise affects the operation of the Servo System?

Answer
1. What Is Noise?

Noise is an unexpected random signal. Some noise originates from natural phenomena, such as lightening, but most noise that actually affects the operation of a device is created artificially inside or external to the device. Think of noise as an artificially created signal that travels through a transmission path to another signal line.

2. Types of Noises

Noise Sources
Devices that cause rapid changes in voltage or current are noise sources.
The more rapid the changes, the higher the voltage, and the higher the current, the stronger the noise source becomes.

Note:

PWM (pulse width modulation) is a method used to alter the voltage. By switching the voltage ON/OFF at a fast switching frequency, the average voltage can be modified.

3. Transmission Path of Noise

There are the following four noise transmission paths.