Leading DC Motor Manufacturers

A direct current (DC) motor is an electrical machine that transforms electrical energy into mechanical energy by creating a magnetic field powered by a direct current.

What is a DC Motor?

When the DC motor is powered, a magnetic field is created in the stator. The magnetic field attracts and repels magnets on the rotor, which results in the rotor's rotation. For the rotor's continuous rotation, the commutator attached to brushes connected to the power source supplies current to the wire winding of the direct current motor. DC motors are preferred for industrial machinery because of their ability to control their speed with higher precision.

How DC Motors Function

DC motors work based on the idea that mechanical force is produced when a current-carrying conductor is placed in a magnetic field. The direction of this result can be determined using the left-hand rule. Using a variable supply voltage or changing the strength of the current in the motor's windings, we can control the contained speed over a wide range. For bigger areas of use, alternating current (AC) is changed into DC because a DC motor's torque and speed characteristics are superior to an AC motor.

Types of DC Motors

DC motors can be differentiated by the connections between the field winding and the armature. This field winding can be connected parallel to the armature or inserted in a series manner. In some cases, the connection is both. The DC motors can also be differentiated by how the rotor is powered, as they can be brushed or brushless.

Brushed DC Motor

In brushed DC motors, the current is applied by brushes, and the magnetic field is produced by the current sent through the commutator and brushes connected to the rotor. The brushes are made of carbon, which can be separately excited or self-excited. The contained stator is the enclosure that contains the part of the motor and the magnetic field.

The winding of the coil on the rotor can be in a series or parallel to form either a shunt wound DC motor or a series wound DC motor. The commutator is the electrical switch that reverses the current between the rotor and the external power source. This method applies electrical current to the windings and produces a steady, rotating torque by reversing the direction of the current.

Brushless DC Motor

This type of motor contains a permanent magnet rotor and a coil wound stator. Because of this DC motor design, there is no need for brushes. The advantage of a brushless DC motor is the removal of tear and wear of the brushes since very little heat will result from the rotating magnet. Brushless DC motors are more expensive because of their efficiency.

Separately Excited DC Motor

In this type of DC motor, the contained motor has separate electrical supplies for the armature winding and field winding, which are electrically separate from each other. The functions of the armature current and the field current do not interfere with each other, but the input power is their total sum.

Permanent Magnet DC Motor

This DC motor contains an armature winding but does not contain a field winding. Instead, it has a permanent magnet mounted on the stator core's inner surface to produce the magnetic field. The armature is regular, and it consists of a commutator and brushes. The permanent magnet DC motor is smaller in size and is less expensive. In their operation, they use rare earth magnets such as samarium cobalt.

Applications and Uses of DC Motors

DC motors are used in diesel-electric locomotives. The electrical energy converted by a generator in the diesel-electric locomotive from rotational energy is supplied to DC motors connected to the wheels on the engine. In use in cranes, it is ideal for the motor to have the ability to hold a full zero speed where mechanical brakes may not be needed. In electric vehicles, brushed DC motors retract and position electrically powered windows. DC motors are used in pumps because they have variable speed control, high starting torque, good transient response, and a simple control system.

Choosing the Right Brushless Motor Supplier

For the most positive outcome when purchasing a brushless motor from a brushless motor supplier, it is important to compare several companies using our directory of brushless motor suppliers. Each brushless motor supplier has a business profile page highlighting their areas of experience and capabilities, along with a contact form to directly communicate with the supplier for more information or request a quote. Review each brushless motor company website using our proprietary website previewer for an understanding of what each company specializes in. Then, use our simple RFQ form to contact multiple brushless motor companies with the same form.