Servo motor is one component that gets used in high-tech devices in automation technology. This electrical device is self-contained and helps in rotating certain parts of machines with effect and accuracy. Note that the output shaft of this motor can get modified to a certain angle. These motors get used in toys, home electronics, airplanes, and the likes.

What exactly are servo motors?

A servo motor is a motor that helps with precise control as regards angular position, velocity, and acceleration. What this means is that it comes with certain features that the motor may not have. It fuses the components and features of a motor and a sensor. It does this to provide it with positional feedback.

What are the types of servo motors?

These motors can get grouped based on what they are to get used for. The two most vital uses include the DC, AC, brushless, positional, linear, and continuous rotation motors. The average motor gets built using three wires which are the control, power, and ground. Their size and shape are dependent on what they are to get used for.

  1. DC motors

This operates on the same principle as other electromagnetic motors. Their build, design, and operational mode are different. The rotors of the servo got made to belong and have shorter diameters. Also, their sizes are larger than what is obtainable with conventional motors that have the same ratings.

Here are some of the types of these motors:

  • Split series motor

These motors feature a split-field rate and to some kilowatts. The split series motors also come with a unique torque-speed curve as well as a quick decline in the torque as you approach high speed.

  • Series motors

These series motors often come with a starting torque that is rather high and usually draws a lot of currents. Note that this motor comes with poor speed regulation.

  • Permanent magnet motor

This is a fixed excitation motor in which the field gets supplied using a permanent magnet. Also, it boasts of performance that shares similarities with armature fixed field motors.

  1. AC motor

These motors are AC motors that engage the use of encoders along with controllers for giving closed-loop control and feedback. As a result, the motors can get configured for the best output. AC servomotors got grouped into two distinct categories which are the 3 phase and 2 phase groups. The majority of the AC motors are within the squirrel cage type.

  1. Brushless DC motor type

These motors are also referred to as synchronous motors which get powered using a switching power supply or inverter. This makes sure there is an AC to power all the phases of the motor through a closed-loop controller. What this controller does is to provide pulses of current to the motor windings. This in turn helps in controlling the torque and speed of the motor.

The brushless motor system gets built in such a way that shares similarities with the permanent magnet motor. This motor type comes with several unique advantages such as its high power to weight ratio, electronic control, and high speed.

  1. Positional rotational motor

This motor type is the most important servo motor type and as such the most popular. It comes with a shaft output that rotates at 180 degrees and includes physical stops which ensure that they stop turning outside these limits to protect the rotational sensor. They get used in radio-controlled cars, robots, planes, and a wide range of applications.

  1. Continuous rotation motor

This has some semblance to the positional motor, but it can navigate in any direction of choice at any time. Also, the control signal as against setting the static position of the servo gets taken as speed and the direction of movement. This servo can rotate either anticlockwise or clockwise as the case may be.

  1. Linear servo motor

It shares some distinct similarities with the positional motor. Although it comes with some added gears that change the output from moving circular to back and forth. These motors are not easy to find, but you may find them in hobby stores where they get used as actuators in advanced airplane models.

Final thoughts

The servo moto is a vital component required for running planes, toys, robots, and the likes. Knowing the different types and what each one has to offer will go a long way in making your experience pleasant.