BMD-12 - DC brush motor controller

BMD-12 is a built-in speed controller for DC brush motors. The controller provides load compensation and stabilization of rotation speed without an encoder based on the back EMF of the motor. BMD-12 is equipped with a fully-featured PID controller. Independent settings for PID coefficients allow achieving ideal drive operation for any operating speeds and loads.

BMD-12 is designed for speed control and stabilization of a motor without encoder. Adjustable current limit provides overload protection.

BMD-12 is made as an electronic device without a case and is intended for embedding into a panel. The device is convenient to use for operator control panels of various devices.

Speed control modes:

 - speed control by a potentiometer without stabilization;
 - speed control by a potentiometer and speed stabilization by back EMF;
 - setting the speed by parameters via USB without stabilization;
 - setting the speed by parameters via USB, with speed stabilization.

It is possible to set the target motor speed either by a potentiometer knob or through a software (connection to a PC via USB).

Load compensation and speed stabilization

The compensation function allows stabilizing the motor speed regardless of the load on the motor shaft. An external encoder on the motor is not required, the speed is stabilized by using the back EMF measured during motor rotation.

Motor overload protection

The controllers BMD-12 have adjustable motor overload protection. The user can set the required maximum motor current value up to 12A. The function can be used both to protect the motor from current overload and to protect the mechanics from exceeding the permissible torque.

Software setting of operating parameters

Operation parameters can be controlled and adjusted via USB. The software is provided with the device. The software allows to adjust the control mode, target speed and target back EMF values, acceleration and braking ratio, and also to configure the PID parameters for the speed stabilization mode.