5 Torque Motor Manufacturers in 2022
This section provides overview, applications, and principles of torque motors. Also, please take a look at the list of 5 torque motor manufacturers and their company rankings.
Table of Contents
What Is a Torque Motor?
Torque motor is motors with large starting torque and drooping characteristics that enable stable operation over a wide speed range.
They are especially suited for use in rollers and other winding devices because they can achieve high torque at low speeds.
When winding, low torque and high speed are required at the beginning, but as the winding progresses, low speed and high torque are needed as the diameter increases. The characteristic curve of torque motor is similar to the characteristic curve of RPM-torque, which expresses this, so it can be said that torque motor is a motor suitable for winding.
Uses of Torque Motors
Torque motors are used in devices that wind something at a constant speed.
For example, they are used to wind up sheet materials such as cloth, paper, or rubber, or objects on a wire such as metal wire or cable.
Torque motors are also suitable for tightening and loosening valves and screws, opening and closing doors, and other applications that require starting torque.
Thus, torque motors are used in situations where torque adjustment is required.
Principle of Torque Motors
While the rpm-torque characteristic curve of other motors is a mountainous curve that peaks at a specific rpm, the torque motors has a gently sloping curve that falls steadily to the right. This characteristic is called the droop characteristic. Therefore, the torque decreases as the rotation speed increases to maintain the balance between the motor and the load.
As the applied voltage to the torque motors are increased, the curve of the drooping characteristic shifts to a curve with a more rightward slope in proportion to the voltage bisector. Therefore, when used in combination with a voltage regulator, the droop characteristic can be tuned according to the application. Also, if the load torque is constant, the rotational speed can be varied by adjusting the applied voltage.
The torque applied to rotary motion with a constant angular velocity is called static torque, and torque motors operation is suitable for such winding operations that require static torque. Torque motors are also suitable for frequent start/stop operations because the high starting torque requires a small starting current.
Selection of Torque Motors
The winding mechanism requires a constant and stable winding speed. The following points should be considered when selecting a motor.
Since the diameter of the take-up roller increases as it begins to wind, the motor rotation speed must be varied in order to maintain a constant take-up speed. In addition, the torque of the motor must be varied in order to maintain the same tension without any unevenness.
The rotational speed of the motor to maintain a constant winding speed and the torque of the motor to maintain a constant tension are calculated at the beginning and at the end of winding, and torque motors with "rotational speed-torque characteristics" that meets these conditions is selected.
Note that the rating for continuous operation varies depending on the torque setting voltage, so it is necessary to confirm this.
How to Use Torque Motors As Brakes
To maintain constant tension in the take-up mechanism, use torque motors not only on the take-up side but also on the unwind side, so that fine adjustment can be made and maintained properly. The braking characteristic of the torque motors can be used. The following two types of brake characteristics are available.
- Reverse Phase Brake
Torque characteristics when the torque motors are rotated in the opposite direction to the direction of the rotating magnetic field caused by the application of a current voltage. - Eddy Current Brake
Torque characteristics when a stopped motor is rotated by the magnetic field caused by the application of DC voltage.
The torque is higher than that of the torque motors when it is driven, and the motor is turned in the opposite direction. At this time, the torque motors rotates in the opposite direction of the rotational magnetic force while generating a constant braking force. Since the brake force is generated from 0[r/min] rotation speed, this type of brake is suitable for applications where tension is required even when the motor is stopped.
On the other hand, the eddy current brake provides the same braking force regardless of whether it rotates in the forward or reverse direction. When the rotation speed is 0[r/min], the brake force is 0[N-m], but it increases as the rotation speed increases and stabilizes in the high-speed range. Suitable for applications requiring stable tension at high speeds or when tension is required in both forward and reverse rotation.
List of 5 Torque Motor Manufacturers
*Including some distributors, etc.
Sort by Features
- Default
- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
Sort by Area
- India
- Netherlands
Torque Motor Manufacturer Ranking
*Including some distributors, etc.Ranking as of January 2023 in United States
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Tecnotion | 100% |
Ranking as of January 2023 Globally
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Tecnotion | 100% |
Derivation Method
The ranking is calculated based on the click share within the torque motor page as of January 2023. 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
- NBE MOTORS PVT. LTD.: 70
Newly Established Company
- Elmech Industries: 2004 (19 years ago)
- Tecnotion: 1998 (25 years ago)
- NBE MOTORS PVT. LTD.: 1981 (42 years ago)
Company with a History
- Amit Electricals: 1978 (45 years ago)
- Nagpur Motors Pvt.Ltd.: 1981 (42 years ago)
- NBE MOTORS PVT. LTD.: 1981 (42 years ago)
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