What Does a Controller DC Motor Do?

A DC motor controller is a device that controls the working and motion of an electric DC motor. This controller could be either manual or automatic and serve the multiple purposes of regulating the speed, starting and stopping, choosing the rotational direction, limiting the torque and also giving the motor protection from overloads.

Any simple DC motor will need a controller to drive it in forward and backward directions. This is especially true if the motor is needed to build a micro controlled device which will need specific controls.

In its simplest form, the motor is connected directly to a power supply source and the switch is operated manually or using a relay. If a relay is being used, it is normally connected to a sensor which can start and stop the motor automatically. Different positions of the switch lets you choose between changing control, selecting different speeds and starting the motor at reduced voltages.

In controller DC motors that are very small, the overload protection along with the over current protection can be eliminated. The over current protection is provided by the supplying circuit in small motors. In the case of larger motors, the controller has a built in temperature sensing or protective overload relay. For over current protection, there are circuit breakers or fuses in them. A DC motor controller could also have switches for protection.

Motor controllers that are more complex can also be used to control the torque and speed of the connected motor. They are also used in closed loop control systems so that the positioning of the machine is precise.

The different kinds of motor controllers are:
Motor starters
Reduced voltage starters
Adjustable-speed drives
Intelligent controllers

Motors and controllers may be found at Teco Electric Co. Ltd. and you can check out a few to know what you need exactly, depending on the specifications.