The difference between brushed motor and brushless motor. Problem of brushless motor failing to start.

Which is better, brushless or brushed motor?

Brushless motors have the following advantages over brushed motors:

High efficiency: Since brushless motors have no brushes, friction and energy loss are small, so they are more efficient in converting energy and can save more energy.

High torque: Brushless motors have higher torque density, which means they can provide greater output force at the same volume and weight.

High reliability: Since there are no brushes, brushless motors have low maintenance costs, long life, strong anti-interference and higher reliability.

Low noise: Brushless motors have lower noise because there are no sparks and friction noises generated by brushes.

In general, brushless motors have higher efficiency, greater output, longer life and lower noise, so they are superior to brushed motors in many applications. However, brushless motors are usually more expensive and more complex to control, so in some cost-sensitive applications, brushed motors still have a certain market and application prospects.

The difference between brushed motor and brushless motor

The biggest difference between brushed motors and brushless motors is that their rotor structures are different. The rotor of a brushed motor is composed of permanent magnets and brushes, while the rotor of a brushless motor is composed of windings and permanent magnets.

In addition, their working principles are also different. The brushed motor is connected to the power supply through the brush, so that the current flows through the rotating part of the motor, thereby generating a rotating magnetic field, which in turn drives the motor's rotor to rotate. The brushless motor controls the direction and size of the winding current through an external controller to generate a rotating magnetic field, thereby driving the motor's rotor to rotate.

In addition, brushless motors have advantages over brushed motors, such as higher efficiency, greater output force, longer life, and lower noise. However, brushless motors are usually more expensive and more complex to control, so in some cost-sensitive applications, brushed motors still have a certain market and application prospects.

Brushless motor cannot start

There may be many reasons why a brushless motor cannot start. Here are some common problems and solutions:

Power problem: Check whether the power supply is normal, the voltage is sufficient, and the power cord is well connected.

Motor circuit problem: Check whether the motor circuit is connected correctly and whether it is short-circuited or open-circuited.

Controller problem: Brushless motors need to be used with a dedicated controller. Check whether the controller is correctly configured and connected, and whether there is any fault.

Sensor problem: The brushless motor needs a sensor to detect the position and speed of the rotor. Check whether the sensor is normal.

Mechanical problem: Check if the motor rotor is stuck or if there is a malfunction in the motor mechanical part.