A C Servomotors and D C Servomotors - Control System Components - Control Systems

TL;DR

Servo motors are used in automatic control systems to convert small input power into a larger, proportionate output power for controlling mechanical variables such as position, displacement, velocity, and acceleration.

Transcript

so what is a server motor before starting with it let's understand the meaning of the word servo mechanism servo mechanism word it is a combination of two words servo plus mechanism servo is coming from the word servant or slave okay so servo mechanism is defined as so server mechanism is defined as a closed loop control system in which a small inp... Read More

Key Insights

• ✊ Servo motors are used in automatic control systems to convert small input power into a larger, proportionate output power for precise control of mechanical variables.
• 💨 A good servo motor should have low rotor inertia, fast response, linear torque-speed characteristics, a linear relationship between control signal and rotor speed, easy reversibility, stable operation, and the ability to withstand frequent starting operations.
• 🎮 DC servo motors can be classified into armature controlled and field controlled, depending on the control of armature current or field current.
• 🧑‍🦼 Armature controlled DC motors offer better performance, simplified mathematical models, faster response, and improved transient response compared to field controlled DC motors.
• 😒 AC servo motors and DC servo motors use different types of electrical supply for their operation.
• 🏑 Inductance in the armature and field circuits affects torque production and system equations in servo motors.
• 🎮 Speed of response and damping characteristics differ between armature controlled and field controlled DC servo motors.

Questions & Answers

Q: What is a servo mechanism?

A servo mechanism is a closed-loop control system in which a small input power controls a larger output power in a proportionate manner. It is used to control mechanical variables in automatic control systems.

Q: What are the requirements for a good servo motor?

A good servo motor should have a low inertia of the rotor, a fast response, linear torque-speed characteristics, a linear relationship between the electrical control signal and rotor speed, easy reversibility, stable operation without oscillations or overshoot, and the ability to withstand frequent starting operations.

Q: What is the difference between armature controlled and field controlled DC servo motors?

In armature controlled DC servo motors, the armature current is varied to control the torque, while in field controlled DC servo motors, the field current is varied. Armature controlled motors have better performance, simplified mathematical models, faster response to changing inputs, and improved transient response.

Q: How are servo motors classified based on the electrical supply used?

Servo motors are classified into AC and DC servo motors. DC servo motors can be further classified into armature controlled and field controlled DC motors.

Summary & Key Takeaways

• Servo motors are a type of motor used in automatic control systems to convert small input power into a larger, proportionate output power.

• They are used to control mechanical variables such as position, displacement, velocity, and acceleration.

• Servo motors work on error signals and are driven by these signals to achieve precise control in automatic control systems.