Brushless dc servo motor controller development and the status quo

Brushless dc motor controller, although existing long in the market, but the similar products on the market in such aspects as performance, price, stability are often difficult to meet the needs of users. Especially in today's technology open market environment, different manufacturers produced brushless dc servo motor control modules are mostly the same, there is little innovation and change in technology. For some traditional industries, they on the design of brushless dc servo motor control module has no special requirements, however, with the rapid development of modern electronic technology, especially the electronic products integration, the rapid rise of the modular design idea, requirements of technical performance index of electronic products is becoming more and more high.

because of the brushless dc servo motor is a kind of no commutator of the dc motor, brushless dc motor can effectively overcome the has caused by commutation spark of torque ripple and electromagnetic interference problems, but also do not break has the characteristics of the brushless dc motor is easy to control. So as the brushless dc servo motor used in related industries, people also to its control performance requirement enhances unceasingly. Therefore, to develop high performance brushless dc servo motor control system become an issue of common concern.

the control of the brushless dc servo motor has experienced from analog control circuits to the digital control circuit with the single chip processor as the core of the development process, but there are inherent flaws. The former as a result of emulator easy aging and is sensitive to temperature changes; Although the latter overcome the inadequacy of analog devices, computing speed is slow, difficult to achieve modern industry the requirement of the real-time control on the motor.

before the advent of DSP, the designers with the traditional motor control mainly using a combination of the two: cheap expensive with dc motor controller control, or use the complex control of ac motor controller. With the development of control theory, in order to develop high performance controller, general single chip microprocessor or more pieces cannot meet the sophisticated control algorithm, and makes the control of the brushless dc servo motor can not achieve high accuracy requirement. Since the emergence of DSP motor control become one of the DSP main application fields.