¿Cómo funciona un motor DC sin escobillas?

Brushless DC motorsare common in industrial applications worldwide. En el nivel más básico, hay motores de cepillo y cepillo, así como motores de CC y AC. Puede pensar que un motor de CC sin escobillas no contiene pinceles, pero usa la corriente de CC. Compared with other types of motors, these motors have many specific advantages, but fundamentally speaking, what exactly is a brushless DC motor? How does it work and what is its purpose?

This passage is going to talk about the followings of brushless DC motor:

(1) The working principle of brushless DC motor

(2) What are the uses of brushless DC motor?

(3) Select the best motor

The working principle of brushless DC motor

It usually helps to explain the working principle of a brushed DC motor because it has been used for a while before thebrushless DC motorestá disponible. The brushed DC motor has permanent magnets on the outside of its structure and a rotating armature on the inside. The permanent magnets fixed on the outside are called stators. The armature that rotates and contains electromagnets is called a rotor.

In a brushed DC motor, when current flows to the armature, the rotor rotates 180 degrees. To advance further, the magnetic poles of the electromagnet must be reversed. When the rotor rotates, the brushes come into contact with the stator, which reverses the magnetic field and makes the rotor rotate a full 360 degrees.

Brushless DC motors actually flip from the inside out, so there is no need to use brushes to flip the electromagnetic field. In a brushless DC motor, the permanent magnet is located on the rotor and the electromagnet is located on the stator. The computer then charges the electromagnet in the stator to rotate the rotor 360 degrees.

What are the uses of brushless DC motor?

The efficiency ofbrushless DC motorsis usually 85-90%, while the efficiency of brushed motors is usually only 75-80%. The brushes will eventually wear out, sometimes causing dangerous sparks, thus limiting the service life of the brushed motor. Brushless DC motors are quiet, light, and have a longer service life. Because the computer controls the current, the brushless DC motor can achieve more precise motion control.

Because of all these advantages, brushless DC motors are usually used in modern equipment that requires low noise and low heat, especially in equipment that runs continuously. This may include washing machines, air conditioners and other consumer electronics products. They may even be the main power of service robots, which will require very careful control of force for safety reasons.

Compared with other types of motors, brushless DC motors have several obvious advantages, which is why they have entered many household products, and may be the main factor in the development of service robots inside and outside the industrial field.

Si cree que su aplicación puede beneficiarse de esta tecnología, navegue por la lista de proveedores e integradores de motores DC sin escobillas.

Seleccione el mejor motor

Finalmente, hablemos de qué buscar al elegir un motor. La característica más importante es el motor eléctrico KV. El motor con un voltaje de 2000kV por voltio entregado al motor girará a una velocidad de 2000 revoluciones por minuto. El tamaño está estrechamente relacionado con KV. Los motores grandes generalmente tienen un par más alto, pero más bajo KV, y usan hélices más grandes, mientras que los motores delgados pero más largos tendrán KV más alto, bajo par y son más adecuados para hélices pequeñas. La potencia máxima del motor también es un factor a considerar. Exceder el límite de potencia del motor hará que el motor se caliente, reduciendo así en gran medida su eficiencia o incluso dañándolo. Para el mismo valor de KV, el rendimiento de una marca de motor puede ser mejor que otras marcas. Es por eso que debe probar el motor eléctrico antes de construir un dron u otro equipo a su alrededor.