It might be difficult to define exactly what servo motors are and when they should be used as they grow increasingly prevalent. This post highlights the special characteristics of servo motors and how they help particular applications.
Benefits of using servo motors in industrial applications
When choosing a motor, it’s crucial to take the needs of the particular application into account. There are numerous advantages that servo motors may have over induction motors in industries. They are as follows:
More powerful and compact
The higher torque density of synchronous motors as compared to induction motors is their most obvious advantage. Similar in size to an induction motor, a servo motor will often have 40–60% more torque.
This means that a servo motor must be more compact and lightweight than its induction counterparts in order to achieve the needed torque, speed, or power for the application.
A PM motor is therefore perfect for applications that have weight or space restrictions.
For instance, servo motors perform admirably in a variety of robotics applications that require small, light motors with great power, accuracy, and speed.
Builders of robotics machines have a significant edge because of the outstanding power output that servo motors provide, which results in more dependable, space-saving solutions.
In renewable energy applications like wind power, where motor performance and efficiency are crucial, the same idea is applicable.
Low inertia for High Dynamic Response
A servo motor has a lower inertia than equivalent induction motors by nature because it is more compact. The synchronous motor can accelerate and descend to/from its rated speed much more quickly due to its low inertia.
Additionally, it enables far more accurate starting and stopping at full speed. Synchronous motors are therefore perfect for motion-control or highly dynamic applications.
For motion control purposes, servo motors are particularly well suited for packing applications.
For accurate, coordinated motion, these low-inertia motors collaborate with EtherCAT Motion Controls. The packing line’s tracking, sorting, and shaping processes all benefit from this adaptable setup.
Full Torque at Zero Speed
The PM motor’s ability to continually deliver its full torque at zero speed is a significant advantage. Contrast this with the majority of induction motors, which have low-speed torque and stability limitations.
For low-speed operation, VFD changes (such as Voltage Boost) can be made, but the performance is constrained and the motor is further heated.
So, a servo motor (with feedback) would be required if a holding torque at zero speed is required or if the application calls for running at low speeds.
Higher IP rated protection
In addition to advantages for motor control, servo motors frequently have advantages in the layout of their housings. Because KEB’s synchronous motors do not need a cooling fan, they can achieve IP65 protection.
On the other hand, induction motors are typically IP44 or IP54. Therefore, a servo motor may be advantageous to prevent premature failure if the motor is operating in a hostile environment.
The brushless construction of servo motors makes them particularly suitable for harsh conditions and applications.
This applies to the food and beverage industry where equipment may be subject to rapid temperature changes and washdowns.
A servo motor can be advantageous in many industrial applications that involve high pressures or temperatures.
And last, with all the benefits that servo motors have over induction motors, you might be wondering why anyone would ever choose an induction motor.
The traditional explanation is because servo motors have historically been far more expensive than induction motors.
Additionally, even though servo motors are still more expensive, the difference in cost has been closing. Today, synchronous motors can be found for only 10–20% more expensive than induction motors with equal power ratings.
In the past, the price of a servo motor could be twice as expensive as an induction motor or even more. This price disparity ought to continue to close as servo motors become more widespread.
Other benefits of Servo motors include:
A servo motor is used to actuate movements at each “joint” of a robot, giving the robot arm its exact angle.
Servo motors move, halt, and start conveyor belts that transport products to different stages, such as product packaging/bottling and labeling.
To sharpen out-of-focus photographs, a camera’s built-in, very precise servo motor adjusts the lens.
The wheels of the robotic vehicle are controlled by servo motors, which are frequently employed in military applications and bomb detonation.
These motors produce enough torque to move, stop, and start the robotic vehicle smoothly, as well as to regulate its speed.
Solar tracking system:
Servo motors change the solar panels’ angles throughout the day so that they remain facing the sun and provide the most energy possible from sunrise to sunset.
Machines for cutting and shaping metal:
Servo motors offer accurate motion control for milling, lathe, centering, punching, pressing, and bending in the manufacturing of metal for goods like jar lids and car wheels.
The azimuth and elevation driving axes of antennas and telescopes used by the National Radio Astronomy Observatory are driven by servo motors (NRAO).
Servo motors operate woodturning machinery (lathes) that, for instance, shape table legs and stair spindles. They also auger and drill the holes required for the subsequent assembly of such goods.
Industrial spinning, weaving, and knitting equipment
that creates textiles like carpeting and fabrics as well as wearable goods like socks, hats, gloves, and mittens is controlled by servo motors.
Whether printing a newspaper, a magazine, or an annual report, servo motors accurately stop and start the print heads on the page and move paper while printing several rows of text or graphics in precise lines.
Automatic Door Openers:
Whether the signal to open is given by a push plate near the door for handicapped access or by a radio transmitter placed overhead, supermarkets and hospital entrances are great examples of automatic door openers operated by servo motors.
Without servo motors, the world would be a very different place. They enhance our quality of life, make a variety of tasks simpler, and frequently result in goods that are more reasonably priced, whether they are utilized in industrial manufacturing or in commercial applications.
Epoch Servo Motors: An application advantage
We,at epoch automation, provide high quality synchronous and asynchronous servo motors. We provide a suitable drive solution. The USP of our product are as follows:
1) We have a wide variety of motors such as 1.5 KW, 2.2 KW,3.7 KW, 5.5 KW, 7.5 KW and 9.3 KW servo motors which need 400V and 66.7 Hz input supply.
2) RPM: 2000 to 6000 .
3) The rotor inertia is low which gives high response to speed command and control the load effectively.
4) These motors have Class F insulation which makes them capable of working at 155 C temperature.
5) It has incremental encoder 1024 PPR for Speed feedback.
6) It has Winding protection by thermal switch , mounting flange cum Foot B35 and Star winding connection.
To know more about our products , visit our Website www.Epochautomation.com or contact us at 9825045087.