![]() ![]() Brushed DC motors are widely used in applications ranging from toys to push-button adjustable car seats. There are several variations on the brush DC motor, but permanent magnet DC motor (PMDC) is used extensively in robotics. Stepper Motor Controllers: used with unipolar or bipolar stepper motors depending on their kind.Ī brushed DC motor is one which uses two brushes to conduct current from source to armature.Servo Motor Controllers: used for hobby servo motors.Brushless DC motor controllers: used with brushless DC motors.Brushed DC motor controllers: used with brushed DC, DC gear motors, and many linear actuators.Since there are several types of motors, there are several types of motor controllers (different type of motor requires different type of controller) : The size of a motor controller is usually related to the maximum current it can provide. The physical size and weight of a motor controller can vary significantly, from a device smaller than the tip of your finger used to control a mini sumo robot to a large controller weighing several Kg. Also, some motor controllers can be manually controlled by an analogue voltage (usually created with a potentiometer). Usually, the microcontroller can instruct the motor controller on how to power the motors via a standard and simple communication method such as UART or PWM. Thus, the microcontroller and the motor controller have to work together in order to make the motors move appropriately. The motor controller, on the other hand, can provide the current at the required voltage but cannot decide how the motor should run. Motor controller acts as an intermediate device between a microcontroller, a power supply or batteries, and the motors.Īlthough the microcontroller (the robot’s brain) decides the speed and direction of the motors, it cannot drive them directly because of its very limited power (current and voltage) output. ![]() A motor controller is an electronic device that helps microcontroller to control the motor.
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