11 Brushed DC Motor Manufacturers in 2023
This section provides an overview for brushed dc motors as well as their applications and principles. Also, please take a look at the list of 11 brushed dc motor manufacturers and their company rankings.
Table of Contents
What Is a Brushed DC Motor?
A brushed DC motor is, as the name implies, a DC motor with brushes.
The structure of the motor is designed to provide current even when the motor is rotating, by providing brushes that contact the commutator in order to pass current to the constantly rotating rotor. The brushes are mainly made of carbon and other materials, and they wear out as they rub against the commutator during use, so they need to be replaced periodically. In addition to the brushes and commutator, DC motors are composed of a rotor and stator.
Uses of Brushed DC Motors
Most brushed DC motors are used to drive rollers and other equipment in factories.
In the past, DC motors were often controlled by a ward-Leonard or thyristor-Leonard method, in which a tachometer or other device attached to one shaft of the DC motor was used to detect the rotation speed, and the speed was controlled to the required speed based on the feedback.
Principle of Brushed DC Motors
In brushed DC motors, an electric current is sent through the brushes to the rotor coil, and the direction of the magnetic force of the stator permanent magnet and the current generate a rotating force according to Fleming's left-hand rule, causing the motor to rotate.
The part of the stator that generates the magnetic force is called the field magnet. The rotational speed N of the rotor can be obtained as (V-R0I0)/kΦ, which is proportional to the magnitude of the power supply and inversely proportional to the magnetic force. Therefore, if the rotation speed is to be increased, the power supply voltage must be increased or the magnetic force must be decreased. In the case of a DC motor with a constant rotation speed, the rotation speed can be increased by increasing the resistance of the variable resistor attached to the field side. This is because the magnetic force Φ = k´v´/r (r is the resistance of the field magnet) can be obtained.
To control a DC motor, an AC power source is converted to DC using a thyristor, and the voltage applied to the motor changes at the timing when the thyristor is turned on to control the speed. This is called the thyristor-Leonard method.
Difference Between Brushed DC Motors and Brushless Motors
In general, brushed DC motors are more widely used than brushless motors. This is because they are inexpensive due to their relatively simple structure.
The differences in the structure of the two are as follows:
- Rotor Structure of (inner rotor)
Brushed DC motors: Coil (electric magnet)
Brushless motor: Permanent magnet - Structure of stator (outside)
Brushed DC motors: Permanent magnet *Exceptions
Brushless motor: Coil (Electro magnet)
Brushed DC motors are also easier to control than brushless motors. Brushless motors require instructions on what speed to set, while brushed DC motors can be powered by dry cell batteries.
Brushed DC motors are less durable than brushless motors. The reason is that the brushes are in direct contact with the rotor (inner rotor) to conduct current through the coil, which gradually wears out and eventually stops flowing. Therefore, when using brushed DC motors for equipment that requires long life, it is necessary to give due consideration to the life of the motor and, in some cases, replace it periodically.
In contrast, the life of a brushless motor is mostly determined by the life of its internal bearings. Bearing life is calculated. It is generally much longer than the life of the brushes.
Why Choose Brushed DC Motors
Brushed DC motors have a coil rotor structure, of which the rotor inertia is generally small. This makes them suitable for use in operation patterns that require acceleration. They also have excellent torque characteristics.
- Fine speed control and positioning accuracy are not required
- No risk to human life at the end of life
- Lifetime cannot be controlled (periodic replacement)
- Large torque is required
- The cost of the control circuit is not high
The above applications are worth considering.
List of 11 Brushed DC Motor Manufacturers
*Including some distributors, etc.
Sort by Features
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- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
Sort by Area
- United States of America
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Kollmorgen
Brush DC Motors
Company Overview
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.
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Greensky Power
Brushed DC Motor
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GEMS MOTOR LIMITED
BRUSHED DC MOTORS
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VOLCANO ELECTRIC
Brushed DC Motor
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Power Electric
Brushed DC Motors
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Ningbo Leison Motor Co. Ltd
Brushed Dc Motors
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AMETEK PDS
DC Brush Motors
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Retek Motion Co., Limited.
Brushed DC Motors
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Brushed DC Motor Manufacturer Ranking
*Including some distributors, etc.Number of Employees
- Kollmorgen: 1,500
Newly Established Company
- Kollmorgen: 1916 (107 years ago)
Company with a History
- Kollmorgen: 1916 (107 years ago)
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