The functioning of a Servo Electric Motor

Servo electric motor contains a DC electric motor, an equipment system, a placement sensing unit, as well as a servo circuit [วงจร เซอร์ โว, which is the term in Thai]. The DC electric motors obtain power from a battery as well as run at broadband and low torque. The Gear as well as shaft assembly connected to the DC motors lower this speed right into the adequate rate and greater torque. The position sensing unit detects the placement of the shaft from its guaranteed setting as well as feeds the details to the control circuit. The control circuit accordingly translates the signals from the placement sensor and compares the actual setting of the motors with the wanted position and as necessary regulates the instructions of rotation of the DC motor to get the needed placement. Servo electric motor typically needs a DC supply of 4.8 V to 6 V.

Controlling a Servo Motor

A servo-electric motor is controlled by controlling its placement utilizing Pulse Size Inflection Strategy. The width of the pulse related to the electric motor is varied as well as send out for taken care of the quantity of time.

The pulse width establishes the angular position of the servo-electric motor. For instance, a pulse width of 1 ms causes an angular position of 0 degrees, whereas a pulse width of 2 ms causes an angular size of 180 levels.


  • If a hefty weight is placed on the motor, the driver will raise the present to the electric motor coil as it attempts to turn the motor. There is no out-of-step problem.
  • High-speed operation is feasible.


  • Since the servomotor attempts to revolve according to the command pulses but lags, it is not ideal for accurate control of rotation.
  • Higher price.
  • When quit, the motor’s blades continue to return as well as forth one pulse, to ensure that it is not appropriate if you require to avoid resonance.