基于PWM控制的反激式氦氖激光器电源设计

根据氦氖激光器直流高压的工作特点, 成功研制了一种氦氖激光器电源。该氦氖激光器电源基于PWM控制芯片SG3524, 采用恒频脉宽调制控制方式, 自动调整输出功率得到稳定的电源输出。对反激式变压器驱动电路进行合理的设计, 实现了对电源电流的有效控制和工作过程中电流的自稳定调节。在电流值为3、4和5 mA时, 对激光电源的电流稳定性以及激光器的出光功率稳定性进行测试。测试结果表明, 激光电源输出电流和激光器出光功率均稳定。该电源结构简单、工作高效稳定、体积小、重量轻、有较强的推广性。

Abstract

According to the working characteristics of He-Ne laser DC high voltage, a He-Ne laser power supply is successfully designed. The He-Ne laser power supply is based on the PWM control chip SG3524, and adopts a constant frequency pulse width modulation control mode to automatically adjust the output power to obtain a stable power output. The flyback transformer driver circuit is reasonable designed. The effective control of the power supply current and the self-stabilization of the current during operation are realized. The current stability of the laser power source and the laser light power stability are tested at current values of 3, 4 and 5 mA. The test results show that the laser power output current and the laser output power are both stable. The power supply has the advantages of simple structure, high efficiency and stability, small size , light weight , which has strong promotion.

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