Brushless DC motor controller BLD-50

Dimensions of brushless DC motor controller BLD‑50

Description of brushless DC motor controller BLD‑50

The controller BLD-50 is designed to control 3-phase brushless motors with Hall sensors. Maximum current of up to 50 A is suitable for medium and big size motors.

The controller provides current limiting function to prevent motor overload and damage. An external braking resistor can be connected for long-term braking and operation with high-inertial loads.

The DC brushless motor controller BLD‑50 provides the following functions:

• Analog speed control of a BLDC motor is carried out by a built-in or external potentiometer or analog signal;
• Switching to a second speed when receive an external discrete signal;
• Smooth acceleration and deceleration of the motor, which is regulated using the internal potentiometer;
• Start and stop the motor with the button START/STOP or with a signal to the discrete input;
• Reversing the direction of rotation of the motor with the button DIR or with a signal to the discrete input;
• Emergency stop of the brushless motor in case of breaking the protective electrical circuit HARD_STOP;
• The maximum operating current limit is set by a user within the range from 5 to 50 A;
• Connection of an external braking resistor to dissipate regenerative energy (generated by the motor during coasting, forced rotation);
• Control of an external electromagnetic brake - automatically when start and stop the motor, or using an external discrete signal.
• Indication of alarms with a discrete output signal, error code is available to be read through USB.
• PID coefficients adjustment is available by users when connected to a computer;
• Connection to a computer via USB (TYPE-C) for setting and monitoring drive operating parameters.

Brushless motor speed control:

The following control signal options are available to control the motor speed:

• built-in potentiometer;
• external potentiometer;
• analog signal 0 … 5 V;
• analog signal 0 … 10 V;
• analog signal -10 … +10 V;
• analog signal 4 … 20 mA;
• PWM signal;
• Discrete signal SECOND_SPEED for switching to the second speed (set by the built-in potentiometer)

Discrete input control signals:

• START/STOP – motor start and stop;
• DIR – set motor direction
• SECOND_SPEED – switching to the second speed;
• BRAKE – control of an external electromagnetic brake

The logic of the START/STOP and DIR signals is selected and can be configured by the user in accordance with the system requirements – triggering by the signal level or by the signal edge.

Alarm Indication

The controller BLD-50 provides alarm indication with an external discrete signal FAULT. The current error code is available for reading via USB.

Limiting the maximum motor current

The controller BLD-50 provides for limiting the maximum current (and output power) of the motor. The limit is set by a built-in potentiometer, the set value can be controlled when connected to a computer via USB.

• Current limit setting – from 5A to 50A;
• Limit response time – adjustable

External electromagnetic brake control

The controller BLD-50 provides the function to control an external electromagnetic brake of the motor. Brakes are usually built into motors to prevent shaft displacement under the influence of an external force. BLD-50 provides two options for brake control:

• Automatic hold and release when start and stop a motor;
• Brake control using an external discrete signal.