Is it better to have a brush DC motor or a brushless motor? What is the difference between the two

In the end, DC brush motor or brushless motor is good, has been the subject of debate, some friends say brush good, some friends say brushless better, in fact, we can not be one-sided view, need to start from a practical point of view and use of the field. So what is the difference between the two, Vacuz give you an introduction! I hope it can be useful to everyone!

1. Different ways of speed regulation

Brush DC motor mainly through the carbon brush to commutation, adjusted voltage current through the rectifier and brush changes, changing the electrode magnetic field strength, thereby changing the speed, also called variable voltage speed regulation, the use of traditional analog circuit can be controlled, the structure is relatively simple.

Brushless DC motor main voltage remains unchanged, ESC changes the control signal, through the processor to change the switching rate of MOS tube, so as to change the speed, also called frequency regulation.

2. Response speed and starting torque

Brush starting speed is faster, torque is larger, speed change is smoother, and starting load capacity is large.

Brushless starting torque is relatively small, and the load is smaller.

3.Long life and maintenance cost

Brushless motors have no brushes and are basically maintenance-free, and can work continuously for 20,000 hours, which can be used for 7-10 years; while brushed motors usually have a life of about 5,000 hours and 2-3 years due to the wear of carbon brushes. Relatively speaking, the cost of brush motor is much lower than brushless motor, and the price will be cheaper.

4. Application occasions are different

Brushless motors are mostly used in the fields and places with high precision requirements, such as avionics, household appliances, medical equipment, power tools, office equipment, aerospace, new energy vehicles, etc.

5. Energy saving

Brushless motor is more energy-saving than brush motor.

In the end is a good brush DC motor or brushless motor, the above is a simple explanation, I hope that when you buy, according to their needs to choose, so as to help you!

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