VIDEO
HIGHLIGHT
Log InSign up
How a DC servo motor works ? | detailed 3d Animation....
SummaryTranscriptChat

How a DC servo motor works ? | detailed 3d Animation....

Understanding Servo Motors

Introduction to Servo Motors

  • Servo motors are simple, cost-effective devices used in various creative projects. The video focuses on Hobby DC Servo Motors and their functionality.
  • A DC motor converts electrical energy into mechanical energy but lacks precision in movement, primarily providing continuous rotation.

Differences Between DC Motors and Servo Motors

  • Unlike DC motors, servo motors offer precise control over the movement of their drive shafts, making them suitable for applications requiring accuracy.

Internal Structure of a Servo Motor

Gear Section

  • The gear section of a servo motor is designed to produce low-speed, high-torque output. Torque refers to the rotating force that the motor can apply.
  • The principle of gear ratio is crucial; for example, a 3:1 gear ratio means that for every three rotations of the input gear, the output gear completes one rotation.

Application of Gear Ratio in Servo Motors

  • In servo motors, a DC motor drives the gear section with an equivalent gear ratio of 260:1. This results in low speed but high torque at the output.

Feedback Control System in Servo Motors

  • A feedback control system is integral to how servo motors operate. They utilize potentiometers as feedback sensors to relay position information back to the control unit.

Wiring and Signal Control

  • A typical DC servo motor has a three-pin connector: red for power supply, black/brown for ground, and orange/white for PWM input signal control.

Understanding PWM Signals

Definition and Functionality

  • PWM (Pulse Width Modulation) signals are analog signals used across various applications including communication and power control. They consist of repeated rectangular pulses with defined time periods.

Controlling Position with PWM Signals

  • The position of a DC servo motor is controlled by varying pulse widths within PWM signals; specific pulse widths correspond to specific angles (e.g., 1 ms = 0°, 1.5 ms = 90°, 2 ms = 180°).

Continuous Moving DC Servo Motors