Ms. Liuliu Yin Profile

Liuliu Yin

at Univ of Shanghai for Science and Technology

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Proceedings Article | 19 October 2016 Paper

Application of drive circuit based on L298N in direct current motor speed control system

Liuliu Yin, Fang Wang, Sen Han, Yuchen Li, Hao Sun, Qingjie Lu, Cheng Yang, Quanzhao Wang

Proceedings Volume 10153, 101530N (2016) https://doi.org/10.1117/12.2246555

KEYWORDS: Control systems, Interferometers

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In the experiment of researching the nanometer laser interferometer, our design of laser interferometer circuit system is up to the wireless communication technique of the 802.15.4 IEEE standard, and we use the RF TI provided by Basic to receive the data on speed control system software. The system’s hardware is connected with control module and the DC motor. However, in the experiment, we found that single chip microcomputer control module is very difficult to drive the DC motor directly. The reason is that the DC motor's starting and braking current is larger than the causing current of the single chip microcomputer control module. In order to solve this problem, we add a driving module that control board can transmit PWM wave signal through I/O port to drive the DC motor, the driving circuit board can come true the function of the DC motor’s positive and reversal rotation and speed adjustment. In many various driving module, the L298N module’s integrated level is higher compared with other driver module. The L298N model is easy to control, it not only can control the DC motor, but also achieve motor speed control by modulating PWM wave that the control panel output. It also has the over-current protection function, when the motor lock, the L298N model can protect circuit and motor. So we use the driver module based on L298N to drive the DC motor. It is concluded that the L298N driver circuit module plays a very important role in the process of driving the DC motor in the DC motor speed control system.

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