Development of Residual Voltage Testing Equipment
10.3969/j.issn.1671-7104.2014.03.008
- VernacularTitle:剩余电压测试仪的研制
- Author:
Xiaohui ZENG
1
;
Mingjun WU
;
Li CAO
;
Jinyi HE
;
Zhensheng DENG
Author Information
1. 中南大学地球科学与信息物理工程学院
- Keywords:
residual voltage detection;
outage at voltage peak;
zero crossing detection;
delay control
- From:
Chinese Journal of Medical Instrumentation
2014;(4):261-263,286
- CountryChina
- Language:Chinese
-
Abstract:
For the existing measurement methods of residual voltage which can't turn the power off at peak voltage exactly and simultaneously display waveforms, a new residual voltage detection method is put forward in this paper. First, the zero point of the power supply is detected with zero cross detection circuit and is inputted to a single-chip microcomputer in the form of pulse signal. Secend, when the zero point delays to the peak voltage, the single-chip microcomputer sends control signal to power off the relay. At last, the waveform of the residual voltage is displayed on a principal computer or osciloscope. The experimental results show that the device designed in this paper can turn the power off at peak voltage and is able to accurately display the voltage waveform immediately after power off and the standard deviation of the residual voltage is less than 0.2 V at exactly one second and later.
