Here is a look at how a Servo Motor functions. Its advantages and disadvantages as well as its applications.
The selection of an electric motor for electro-mechanical projects is crucial. If the project requires high precision, the servomotor is an option. We will be discussing what a servomotor is, its advantages and disadvantages as well as their applications.
We’ll also find out why they are a fundamental device in robotics, and other industrial sectors that demand precise motions.
A servomotor is either a linear or rotary actuator. It can be used to control acceleration, velocity, and angular position. The motor is coupled to a sensor for position feedback. This controller must also be very sophisticated. It is common to find a module specifically designed for servo motors.
It’s an electrical device that can move or rotate objects with great precision. You can use the servo motor to rotate an object at specific angles or distances. It is a simple motor that runs through the servo mechanism.
If the motor draws its power from DC, it is called a DC servomotor. If the motor is powered by AC power, then it’s an AC servomotor. You can have a high-torque servomotor in small and lightweight packages. They are useful in many applications, including toy cars, RC planes, robotics, and machines.
Construction of Servo Motor
This motor is a closed loop mechanism that uses positional feedback to control the rotational and linear speed as well as position.
In reality, this motor is actually four pieces:
Normal DC motor – It is responsible for creating the motion through its shaft.
Gear reduction unit/gear box
The DC motor is connected with a gear system that provides feedback to the position sensor. This sensor is usually a potentiometer.
It is connected to a central shaft and indicates at all times which angle the shaft of the motor is available.
The output of the motor is sent via servo spindle to the servoarm from the gearbox or gear reduction. The gear box contains gears that may increase or decrease the speed or torque.
Visit for ZGSM for servo motor power cable.
The standard servomotor uses a plastic gear while the high power servomotor uses a metal gear.
A control circuit is used to control the motor’s movement by sending out electric pulses.
Three wires make up the motor. One is a black wire that connects to ground. A yellow/white wire is connected to the control unit. The power supply is also connected by a red wire.
Advantages of Servo Motor
Drivers who place a lot of load on the motor will cause it to draw more current. The motor will then attempt to turn. There is no exception to the rule.
High-speed operation can be achieved.
Disadvantages to Servo Motor
Motor tries to turn according to command pulses but fails. It is not designed for precise control of rotation.
Stopping the motor will cause its rotor to continue moving one pulse back and forth. If vibration is a concern, the motor’s rotor will continue to move one pulse after it has stopped.
Applications of Servo Motor
It’s used for applications that require high speeds and low heat.
They are employed in many industries, including packaging, factory automation and material handling. Automation, robotics and CNC machinery are used in many other challenging applications.
Uses radio-controlled airplanes to control movement and positioning of elevators.
Because of their precise positioning, smooth switching on/off and precise switching.
Hydraulic fluid is essential for aerospace industries.
Uses in many radio-controlled toys.
Use in electronic devices, such as DVDs and Blue ray Disc Players to extend or replay disc trays.
To maintain vehicle’s speed, used in automobiles
What are the Types of Servo Motors Available?
A servomotor is a widely-used variable speed drive in process automation, industrial production and building technology. They are intended and designed to be used in motion control applications that require precise positioning, fast reversing, and exceptional performance. We will be discussing the different types and uses of servo motors in various fields.
What is a Servo Motor, and how does it work?
The servomotor is either a linear actuator or rotary actuator. It can be used to control acceleration, velocity, and angular position. The motor is coupled to a sensor to provide position feedback. This controller must also be very sophisticated. Although the working principle is identical for both the servo and electromagnetic motors, the function and structure are quite different. The standard servomotor uses the plastic gear while the high power servomotor uses the metal gear.
The microprocessor, power transistor and high precision control have made them suitable for many different applications. There are three wires: ground, power, and control. They can be used in a wide variety of applications based on their dimensions and shapes. Most commonly, RC servomotors are used in hobby applications. The main features of this motor are simplicity, cost-effectiveness, and consistency.
Based on the type of supply, there are generally two main types. There are two types: AC servomotors or DC servomotors.
The types of servo motors are briefly described below.
1. AC Servo Motor
An encoder is a component of an AC servomotor. This encoder provides feedback and close loop control. These motors can produce more torque thanks to their superior designs. A servo motor is most commonly used in robotics, automation and other related applications.
Motor positional rotation servo
Positional rotation motors have a shaft that rotates 180 degrees. This type of motor has physical stops in the gear system that prevent the shaft from turning outside. The positional rotation motor is used in robots and aircraft as well as toys and controlled cars.
Continuous rotation servo motor
The continuous rotation servomotor is very similar to the common rotation servomotor. However, it can travel in any direction for an indefinite time. Instead of setting the servo’s static position, the control signal sets the speed and direction for rotation. A range of possible commands can cause the servos to turn clockwise or counterclockwise. The command signal can cause it to change the speed. This motor can be used in a radar dish on a robot. Or, it can be used as a motor for a mobile robotic device.
Linear Servo motor
Linear servomotors are similar to the positional rotation servomotor. It comes with extra gears that allow for the alteration of the o/p to be from circular to back and forth. These servo motors can be difficult to find but you might find them in hobby shops. They are used as actuators for higher-model airplanes.
2. DC Servo Motor
In general, the DC-servo motor has a separate DC source located in the field winding. The field current or armature can be used to control the motor. Both field control and armature control both have their benefits. Because of its small armature reaction, this motor can respond quickly and accurately to end or begin command signals. They can be used in many devices and numerically controlled apparatus.
Series servomotors are capable of producing high starting torque, as well as drawing huge current. This motor’s speed regulation is extremely poor. It is possible to turn around the motor by changing the field voltage polarity with split series field winding.
Split series servomotor
Split series motors are capable of operating as a single-energized, field controlled motor. The motor armature supplies a steady current supply. This motor shares a common curve that corresponds to the motor’s torque speed. This indicates a motor with high stall torque and rapid decrease in torque due to amplifying the speed.
Motor to Control Shunt
Two windings are included in the shunt controller motor, namely armature windings or field windings. The stator is where the field windings are, while the machine’s rotating rotor has the armature and armature windings. In a DC-shunt motor, both windings are connected across the DC source in parallel.
Permanent Magnet Shunt Motor
The permanent excitation motor can be used anywhere a magnetic field is available. The motor performance is the same as an armature controlled permanent motor.
These are the types of servomotors. This motor is a part of servomechanism. They usually pair with an encoder that provides speed feedback and positioning information, as well a fault correcting apparatus that activates the supply signals.