| |
A MICROPROCESSOR-CONTROLLED HIGH-ACCURACY DCM SPEED CONTROL SYSTEM
| [View]
[Download]
|
| Author(s) |
Chen Tie-Nian, Zhang Chen, Chen Wei-Jun |
| Abstract |
A high-accuracy reversible DCM speed control system is developed by using a 8-bit microprocessor. In this system, a staged control method with all digital circuits (digital reference, digital speed measurement and digital firing) is instead of the conventional double closed-loop control algorithm. A "tracking counter-emf" control method is being used at large error in order to optimize the transient behavior, and a single closed-loop linear control method is being used at little error in order to compromise between the algorithm accuracy and response speed of the system. The algorithm is 16-bit word length but the intermediate result in the process is 24-bit word length. The static error of this system is less than 0,05%. The dynamic speed drop is less than 5% and the restoring time is less thsn 0.5 s. The resolution of firing angle is less than 0,01. There is maximum torque and almost no overshoot in the motor starting period. The ratio of the performance to price is superior to common systems. |
| Download |
| Filename: | Unnamed file |
| Filesize: | 2.861 MB |
|
| Type |
Members Only |
| Date |
Last modified 2021-03-10 by System |
| |
 |