Advantages of a Brush DC Motor
The DC Brush Motor is one of the earliest of all electrical motor designs.It is usually the motor of choice for the majority of torque control and variable speed applications.The following discusses the advantages of using a Brush DC Motor in machinery and processes.
The DC Brush Motor is one of the earliest of all electrical motor designs. It is usually the motor of choice for the majority of torque control and variable speed applications.The following discusses the advantages and disadvantages of using a Brush DC Motor in machinery and automated processes.
The Brush DC Motor has a simple construction, therefore may not require a controller.When a controller is chosen, it is typically a simple and inexpensive drive design.
• Understandable design technology facilitates in the quick application of the DC Brush Motor
• The design of the Brush DC Motor is quite simple, in that a permanent magnetic field is created in the by either of two means; permanent magnets or electro-magnetic windings
• If the field is created by permanent magnets, a Brush DC Motor is said to be a "permanent magnet DC motor" (PMDC).If created by electromagnetic windings, the DC
Brush Motor is often said to be a "shunt wound Brush DC Motor" (SWDC). Today, because of cost-effectiveness and reliability, the PMDC motor is the motor of choice for applications involving a fractional horsepower Brush DC Motor, as well as most applications up to about 2.0 horsepower.
• Opposing the stator field is the armature field, which is generated by a changing electromagnetic flux coming from windings
located on the rotor of the DC Brush Motor.The magnetic poles of the armature field will attempt to line up with the opposite
magnetic poles generated by the stator field.Next, the section of the rotor where the electricity enters the rotor windings is
called the commutator.The electricity is carried between the brush motor rotor and the stator by conductive graphite-copper
brushes (mounted on the rotor) which contact rings on stator.