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This section provides an overview for servo motors as well as their applications and principles. Also, please take a look at the list of 10 servo motor manufacturers and their company rankings. Here are the top-ranked servo motor companies as of December, 2024: 1.B&R.
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Servo motor is a general term for a motor that can freely determine its displacement while incorporating an encoder. The word "servo" is derived from the word "servant" (slave), indicating that it operates as specified. Servo motor is often used in robots and processing machines.
Servo motors are almost never seen in household applications, but they are widely used in industrial applications.
One example is assembly robots in automobile factories. Servo motors can be used to assemble a large number of parts quickly and accurately.
Robots with servo motors are also used for painting and welding in automotive plants. Depending on the program, they can reproduce the same motions accurately and quickly.
Precision industrial equipment, such as semiconductor manufacturing equipment and medical devices, also requires high repeatability and accuracy. Many servo motors, both large and small, are used in production equipment.
Permanent magnet synchronous motors are the most widely used small AC servo motors in use today. A synchronous motor consists of a rotor, stator, bearings, and a casing.
The rotor of a permanent magnet type synchronous motor has a permanent magnet attached to it, and the stator winding surrounds the rotor in a circular pattern. Wires connected to the stator windings from the outside conduct alternating current to the stator windings.
The stator winding becomes an electromagnet when the current flows through it. As the AC current changes phase with frequency, the electromagnet also changes polarity with time.
The rotor, on the other hand, rotates in response to the phase change of the stator because the polarity of the permanent magnet is fixed. This is the principle of rotational operation of servomotors.
Most servomotors are small in size and capacity. However, induction motors are sometimes used for large-capacity servo motors.
The most important feature of servo motors is that they come with an encoder. The encoder provides feedback of motor displacement to the control equipment.
A dedicated control device is used to power the servo motors. The control device reads the encoder signal and can control the number of revolutions, speed, etc.
Dedicated control devices for servo motors are called servo drivers or servo amplifiers and are sold by motor manufacturers.
Stepping motors can easily and accurately control the angle and speed of rotation with pulse signals because the amount of rotation is determined by a single pulse. Although the structure is simple and inexpensive, it can be out of synchronization under sudden load and has low torque and high noise level at high rotation speeds.
Servo motors, on the other hand, use a sensor to detect rotation and send feedback signals to the driver. The control signal is compared with the feedback signal and the output is adjusted so that there is no difference, thus enabling fine control.
They rotate more smoothly than stepping motors and are stable, even under high torque, high rotation, or sudden load. On the other hand, motors and drivers are complex and expensive, and since they are controlled by comparison with feedback signals, there is a delay in response to changes in output. Servo motors are used when frequent starting and stopping is required, or when fine control is desired, such as very low speed or reverse rotation.
Servo motors torque is divided into rated torque and instantaneous maximum torque. Rated torque is the torque output at the motor's rated output and rated rotation speed. During normal operation, the motor is used at or below this torque.
Instantaneous maximum torque is the maximum torque that can be output in a short period of time, which reduces the time required for acceleration and deceleration. It can generate 3 to 5 times more torque than the rated torque, but continued use of the motor at the instantaneous maximum torque will shorten its service life.
*Including some distributors, etc.
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Moog Inc. was incorporated in 1951 and is headquartered in East Aurora, New York. The company designs manufactures and integrates precision motion and fluid controls and control systems for customers including OEMS in industries such as aerospace, defense, industrial machinery, motorsports, and construction. The company’s product offerings include both systems and components. Examples of systems include actuation systems, naval systems, turreted weapon systems, and space vehicles. Examples of components include manifolds, slip rings, actuators, and servo actuators.
FANUC Corporation, established in 1972 and headquartered in Yamanashi Prefecture, Japan, is a manufacturer of factory automation, robomachine, IoT, and robotics. The company offers an extensive and diversified product portfolio including, servomotor, robodrill small cutting machine, roboshot electric injection molding machine, robocut wire electrical discharge machine, and lasers. These cutting-edge products cater to a wide range of industries, spanning from automotive, health care, and aerospace to electronics. The aim of the company is to provide efficient and low-cost products to customers.
Initially established in 1938, Shibaura Machine has three-quarters of a century providing Comprehensive technology and supporting the “monozukuri” of the world. With the technical and development capabilities of the Shibaura Machine Group, various machines and services create rich value and contribute to the creation of an industrial base. Working on the eight technical platforms, they develop and manufacture a wide range of production devices that meet the needs of the times, delivering the best solutions by combining our accumulated excellent know-how and the latest technology. Shibaura Machine uses its knowledge of modern global standards of advanced technology to support Japan and the world.
B&R Industrial Automation GmbH, founded in 1979 with headquarters in Austria, is a manufacturer of automation technology, including a complete portfolio of robotics, automation, and software. The company's standard and tailored products are used in the automotive, maritime, medical device assembly, packaging, and plastics markets, among many others. The product line includes industrial PCs, I/O systems, robotics, and software for industrial components. B&R joined the ABB Group in 2017 to specialize in the integration of technology and sophisticated engineering to provide industries with solutions for machine and factory automation, motion control, and integrated safety technology.
Founded in New York in 1916, Kollmorgen designs and manufactures motion system, drives, motors, actuators, gear heads, automated guided vehicle (AVG) systems, and accessories across a number of implementations and industries. These include aerospace, AGV, food&beverage, machine tools, metal forming, medical automation and imaging, energy, packaging, pharmaceutical, postal sorting, printing, robotics, smart warehouses, and tire and rubber production. Kollmorgen assists customers both in custom designs and in allowing customers to design their own devices based on individual needs.
Omron Corporation, started in 1933 and headquartered in Kyoto, Japan, is a manufacturer of automation components, equipment, and systems, and it developed the first contactless proximity switch in 1960. It has four domains, including industrial automation, electronic components, healthcare, and social systems, and it provides products and services in around 120 countries and regions. Some of its products include microsensing devices, access control systems, industrial robots, surveillance cameras, and blood pressure monitors. In 1971, it developed the first online cash machine, and in 1972, it established Japan’s first welfare factory.
Elmo Motion Control is headquartered in Israel and has offices globally. As per its namesake, Elmo motion control servos, drives, controllers, software and more for customers across a wide array of industries. These include medical, packaging, robotics, laboratory automation, semiconductors, laser processing, and aerospace. Elmo also offers products designed for underwater systems, harsh environments, and warehouse management.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | B&R |
100.0%
|
Derivation Method
The ranking is calculated based on the click share within the servo motor page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
5 | 83.3% |
|
United States of America
|
1 | 16.7% |
155 products found - Page 2
155 products - Page 2
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