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Design of Hot-cathode Ionization Vacuum Gauge
Author(s): 
Pages: 4-5,9
Year: Issue:  6
Journal: ELECTRONIC ENGINEER

Keyword:  电离真空计热阴极真空度脉宽调制(PWM);
Abstract: 结合测量高真空用的检测器--高真空电离规管,叙述了热阴极电离真空计的结构、工作原理及其用途;介绍了采用脉宽调制(PWM)技术与推挽变换结合的方法设计出简单、实用、稳定可靠的热阴极电离真空计的驱动电路.该真空计电路性能稳定可靠,由于采用了PWM控制,并经过了变压器的电流变换,没有直接控制热阴极的大电流,从而降低了功耗,大大减少了大电流发热元件的数量,使整机的温升得到有效抑制.
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