SHOPEE COMPRAR AGORA
If you are planning to build a DC motor controller for an electric car, a robot, or a home appliance, drop us a line and get help with electronic design, firmware development, and related services.
Printed circuit board (PCB) prototypes of the robotic lawn mower. Accessibility and simple implementation of BDC motors and their controllers make them a suitable solution for a number of projects.
Note that: I’ve deleted the Automóvel-generated TIM2 initialization function and its parameter. Since our DC Motor library will handle that, we don’t need that function at all.
Electronics and semiconductor manufacturers offer a rich selection of hardware and software components that you can use in your project. For example, in building a BDC motor controller circuit for the robotic lawn mower, we used STM32F4, which is part of the STM32 ecosystem for motor control.
We have connected the Arduino PWM pin 10 to the base of the 2N2222 NPN transistor via 1kOhm resistor. You could use any PWM pin on the Arduino but it must be PWM digital pin. A 10KOhm resistor is connected between the base of the transistor and ground to reduce unwanted current spikes into the base because the base is sensitive.
Primarily, there are two types of loads: resistive and inductive. When selecting components based on the type of load, it's important to remember that if you are working with an inductive load, such as a motor, you should add a diode in parallel with the load to protect the FET from generated reverse EMF.
Connect one resistor to the power supply. One end of the wire must be connected to one end of the resistor. Using a middle-value resistor out of the set first will give you an idea of whether to increase or decrease the resistance depending on the speed of the motor.
The direction of the motor’s spin can be changed by swapping the wires connected on either terminal of the DC motor. If the motor runs by itself and not when connected to the resistor, the value of the resistor is too high for the motor and a lower resistance is needed.
Hey, I’ve updated the article and include a link to the EasyEDA project file. Please check the section of the PCB design above and you will find it.
In a BDC motor controller, the speed and torque are regulated by changing the power supply with the help of voltage regulators. They can be either a separate system or a part of the controller. For different purposes, engineers can use linear or switching regulators.
A 10k Ohm potentiometer is used here. The ends of the resistive track are connected to 5V and ground, respectively, and the wiper pin is connected to the A0 analog input pin of the Arduino UNO.
The PWM controller accepts the control signal and adjusts the duty cycle of the PWM signal according to the requirements. PWM waves with various duty cycle are shown in the figure below.
In both circuits shown above the arduino is supposed to be powered through the 9V external power input jack.
For instance, a DC motor controller for an industrial brushed motor uses different working principles and has a different design compared to a controller for DC motors in electric vehicles.
SHOPEE COMPRAR AGORA