2020-09-27
| In the application of micro DC motors, brushed motors and brushless DC motors each account for half of the country. The big difference between these two types of micro DC motors is that one has a brush and the other is brushless. So apart from the difference in electric brushes, what are the differences in their performance? The performance difference between brush and brushless micro DC motor The brushed micro DC motor has a simple structure and is easy to be controlled. It also has the characteristics of fast response, large starting torque, smooth speed change, etc. The speed is almost no vibration from starting to running, and it can drive a larger load. The brushless micro DC motor has a large starting resistance, a small power factor, a relatively small starting torque, and a relatively small driving load. In terms of speed regulation, the brushed micro DC motor is adjusted by voltage regulation, starting and braking are relatively stable, and the constant speed operation is also stable. The brushless micro DC motor is variable frequency control speed regulation, and the speed is controlled by frequency change. Therefore, the brushless micro DC motor will only be stable when the speed is constant. In terms of control accuracy, the control accuracy of the brushed micro DC motor will be higher, and the brushless micro DC motor needs a limiter to obtain higher precision control. In terms of cost, the brushed micro DC motor is lower, and the brushless DC motor is more expensive, but the brushless DC means that you have no brushes and no friction during operation, which greatly reduces electromagnetic interference and lower noise. The lifespan is also longer. For example, a brushed micro DC motor has a long life of several hundred hours, while a brushless micro DC motor can reach thousands to thousands of hours, and the speed is also greatly improved, up to 10 More than ten thousand revolutions. The brushless micro DC motor integrates the characteristics of the brush micro DC motor, mainly because the control is more complicated and the cost is higher. Therefore, in practical applications, except for the case where the parameters of the brush micro DC motor cannot be satisfied, the brush DC motor application comparison many. |
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