The difference between Servo motor and DC motor is explained here considering factors like the number of wires used either two-wire or three-wire system. The assembly system used, rotation of the motor whether it is continuous or not. The examples of both the motor.
Difference Between Servo Motor and DC Motor in the tabulated form is given below.
| BASIC | SERVO MOTOR | DC MOTOR |
|---|---|---|
| Wire system | The Servo motor is three wire system known as power, ground and control. | DC motor is two wire system known as power and ground |
| Assembly | It has an assembly of four things DC motor, gearing set, control circuit and a position sensor. | DC motor is an individual machine with no assembly. |
| Rotation | Servo motor does not rotate freely and continuously like DC motor. Its rotation is limited to 180⁰ | Movement of DC motor is continuous |
| Examples | They are used in robotic arms, legs or rudder control. | DC motor is used in car wheels, fans etc. |
The Servo Motor is basically a DC motor that does not run continuously for a longer period of time. It has a unique arrangement that allows the motor to rotate at a specific angle with greater accuracy and precision. This machine is controlled by a feedback system.
Direct Current (DC motor) as already discussed in the article DC machine, is a device that converts electrical energy into mechanical. It is based on the principle of Fleming’s left-hand rule that when a conductor is placed in a magnetic field that carries current in it, torque is generated which moves the motor.
According to Fleming’s left-hand rule index finger, middle finger, and thumb when stretched perpendicular it represented the direction of the magnetic field, the direction of the current, and the direction of the force respectively.
Difference Between Servo Motor and DC Motor
- The Servo motor comprises the three-wire system known as Power, Ground, and Control whereas the DC motor is a two-wire system known as Power and Ground.
- Servo motor has an assembly of four things DC motor, gearing set, control circuit, and a position sensor. DC Motor does not comprise any assembly.
- Servo motor does not rotate freely and continuously like DC motor. Its rotation is limited to 180⁰ whereas the DC motor rotates continuously.
- Servo motors are used in robotic arms, legs, or rudder control systems and toy cars. DC motors are used in fans, car wheels, etc.
Hence, a servo motor is different from a DC motor.