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Is it better to choose a brush motor or a brushless motor for Mini electric vehicles?

pxid 2021-01-18 173 times

The motor is one of the four major components of an electric vehicle. Its function is to convert the electrical energy of the battery into mechanical energy and drive the wheels of the electric vehicle to rotate to achieve the purpose of continuous riding of the electric vehicle. So is the electric vehicle motor better with a brush motor or a brushless motor? Let me introduce it in detail below.

First of all, let's understand the meaning of brush motor and brushless motor:

A brushed motor is a rotating electric machine that converts electrical energy into mechanical energy (motor) or converts mechanical energy into electrical energy (generator) with a built-in brush device. The brush motor is the basis of all motors. It has the characteristics of fast starting, timely braking, smooth speed regulation in a large range, and relatively simple control circuit.

The brushless motor is composed of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor runs in a self-controlled manner, it will not add a start winding to the rotor like a synchronous motor that is started under heavy load under variable frequency speed regulation, nor will it cause oscillation and loss of synchronization when the load changes suddenly.

The difference between a brush motor and a brushless motor for electric vehicles:

Is it better to choose a brush motor or a brushless motor for Mini electric vehicles?

1. Scope of application:

Brushless motor: usually used in equipment with relatively high control requirements and high speed, such as model airplanes, precision instruments, etc., which have strict control of motor speed and high speed.

2. Use effect:

Brushless motor: usually digital frequency conversion control, strong controllability, from a few revolutions per minute to tens of thousands of revolutions per minute can be easily achieved. Brushed motors: The old carbon brush motors generally work at a constant speed after starting, and the speed adjustment is not easy. The series motor can also reach 20,000 rpm, but the service life will be relatively short.

3. The brush motor is a traditional product with relatively stable performance.

The brushless motor is an upgraded product, and its life performance is better than that of the brush motor. However, its control circuit is more complicated, and the requirements for aging and screening of components are stricter. Although the motor has a long life, the control circuit is prone to malfunction. Therefore, the selection of brushless motors must undergo rigorous reliability tests to ensure quality.

At present, brushless gearless motors are one of the most widely used motors in electric vehicles. They are widely used by electric vehicle industrial design companies due to their long life, relatively simple structure, and noiselessness. The brushless motor is a new generation of electric vehicle motors. The motor is more advantageous to start, and has strong climbing ability. There is no noise during the driving of the electric vehicle. The brushless motor does not need to replace the carbon brush. Even if the Hall in the motor is damaged, there is no need Replace the motor.