Brushless DC motor controller, also known as BLDC motor controller, is composed of the motor main body and the driver. It has the advantages of good adjustment and starting performance of the DC motor and the simple structure of the asynchronous motor without maintenance. ATO.com offers different models of BLDC motor controllers at economical price to match with 12V, 24V, 36V, 48V 3 phase brushless motors, worm gear motors and planetary gear motors. They are compact and easy to control your motor speed.
The brushless DC motor controller is a control device that can be used to provide a closed-loop commutation control signal for a 3 phase brushless motor. At the same time, the mode can also be used to control the motor speed and perform the necessary protection of the motor. The brushless motor controller is much more complicated than a brushed motor controller.
The brushless DC motor controller is mainly composed of a single-chip microcomputer main control circuit, a power tube pre-drive circuit, an electronic commutator, a Hall signal detection circuit, a signal circuit, an under-current detection circuit, a current-limiting/over-current detection circuit, a brake signal circuit, speed limit circuit and power circuit.
Brushless DC motors must be equipped with corresponding controllers to rotate. This is determined by the structural principle of the brushless dc motor. The brushless DC motor replaces the mechanical commutator with an electronic commutator. It is precisely because the bldc motor uses electronic commutation, so it needs a controller to drive the circuit. The commutation circuit of the DC brushless motor consists of two parts: drive and control. The two parts are inseparable, especially low-power circuits often integrate the two to form a single application specific integrated circuit.
Brushless DC motor belongs to the category of permanent magnet stepper motors. Its performance parameters, model, power supply voltage, output power, phase angle, photoelectric switch or self-identification function must be matched with the controller of the DC brushless motor to ensure the normal operation of the bldc motor. The controller of the brushless DC motor can control the motor to start and stop, forward and reverse, adjust the speed, adjust overvoltage, overcurrent, undervoltage and other conditions. Therefore, the brushless DC motor must use a controller, otherwise the brushless DC motor will not run even if it is powered.
The speed control methods of the BLDC motor controller include self-contained potentiometer speed control, external potentiometer speed control, and external analog signal speed control (0 ~ 5V). Different occasions and distances can use different speed control mode, which is one of the features of our brushless DC motor kit. Watch the video below to learn more about BLDC motor controller control speed with analog signal.
The quiescent current of the BLDC motor controller should normally be within 50MA. The current of the motor is generally around 1.4A at no-load speed, and some motors are around 1.8A. When the control panel does not work, the signal light on the board should flash every second/time. If the signal light does not flash without turning the handle signal, you should check:
Controller current and voltage adjustment.
Example: When using 48V battery voltage and the value of undervoltage is 40.5V:
Ra = (1.2 x 40.5 - 1.2 x 3) / 3 ------- Ra = 15K
Note: 1.2 is the resistance connected to the ground. 3 in the formula is the AD value of the under-voltage processed by the single-chip microcomputer.
When the undervoltage value needs to be adjusted between 40.5V and 42V, when the fully loaded 1.2K resistor is connected to 82K, 39K, 36K, 33K, and 30K, the undervoltage corresponds to: 41.04V, 41.65V, 41.75V, 41.86V, 42V.