Although we have learned what the DC motor is in the previous article, what we know about DC Motor is just the tip of the iceberg. Today, follow me to explore the structure of a DC motor and the working principle of it.
The structure of the DC motor
The DC motor is mainly composed of a stationary stator, a rotating rotor, and an end cap.
The stator is composed of shell, bearing, magnetic shoe, and circlip.
the rotor is composed of a washer, shaft gear, insulating sheet, iron core group, shaft, commutator, pressure-sensitive, and oil baffle.
the end cap provided for the motor brush support consists of terminal blocks, end caps, elastic arms, carbon, and bearings.
How do DC Motors work
The term ‘DC motor’ is used to refer to any rotary electrical machine that converts direct current electrical energy into mechanical energy. DC motors can vary in size and power from small motors in toys and appliances to large mechanisms that power vehicles, pull elevators and hoists, and drive steel rolling mills. But how do DC Motors work?
DC motors include two key components: a stator and an rotor. The stator is the stationary part of the motor，while the rotor rotates. In a DC motor, the stator provides a rotating magnetic field that drives therotor to rotate.
A simple DC motor uses a stationary set of magnets in the stator and a coil of wire with a current running through it to generate an electromagnetic field aligned with the coil center. One or more windings of insulated wire are wrapped around the core of the motor to concentrate the magnetic field.
The windings of insulated wire are connected to a commutator (a rotary electrical switch) that applies an electrical current to the windings. The commutator allows each armature coil to be energized in turn, creating a steady rotating force (known as torque).
When the coils are turned on and off in sequence, a rotating magnetic field is created that interacts with the different magnetic field of the stationary magnets in the stator to create torque, which causes it to rotate. These main operating principles of DC motors allow them to convert the electrical energy from direct current into mechanical energy through the rotating movement, which can then be used for the propulsion of objects. See the image on the right for a schematic display of how the dc motor works.
Kinmore Motor provides permanent magnet brush commutated DC motors with a diameter between 6~80mm. Kinmore Motor keeps researching new technologies for making the motors with longer life and lower noise. DC Motors can be customized for application-specific requirements, including the integration of encoders, gearboxes, custom cable assemblies, brush materials, magnet materials, EMI/EMC suppression networks, and shaft configurations.