In many end markets and applications, an obvious trend is to replace AC motor pumps or mechanical pumps with high-efficiency BLDC pumps. It is very important to realize the control and conversion of high-resolution current and rotational position information of the brushless motor. Although the sensorless solution can be used to detect the back-EMF current, the starting performance of the brushless motor may be an issue.
Another method is to use an angle sensor based on anisotropic magnetoresistance (AMR) technology, which is cheap and accurate. With the help of the ARM sensor, not only high angular accuracy can be achieved, but also the detection element and the electronic circuit can be integrated in the same package. This results in a very small sensor subsystem and the ability to locate the sensor within the motor assembly.
Regarding how to improve the control performance of brushless motors, this article discusses some views from two aspects of brushless controllers and motors.
1. Brushless controller
As the core component of the brushless motor, the brushless controller determines the life and efficiency of the motor itself. Just like the hot new energy electric vehicles, it is more stable and efficient for the controller. Therefore, how to improve the performance of the motor is an aspect of the brushless controller.
2. Motor
The motor is the embodiment of its performance. Only with the brushless controller can its performance be displayed. Therefore, in the manufacture of the motor, it is necessary to select the raw materials of the brushless motor, such as rare earth high magnetic steel, so that the selection of winding materials and internal phase angles can be controlled more conveniently.
3. Energy saving
For example, electric bicycles and new energy electric vehicles use batteries as power sources, which save electricity and can be supplemented by a combination of brushless controllers and brushless motors.
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