Analysis of Temperature Response Characteristics of Voltage RMS Sensor Packaging Based on Diode

Voltage is the most basic and important electrical parameter of circuit and signal. Voltage RMS (Root Mean Square) is an important parameter reflecting the size of active power, and its monitoring is very important. In this paper, based on the principle that the junction voltage of the PN junction of the diode varies with temperature, the packaging design of the AC voltage RMS conversion sensor based on the thermal equivalent method is carried out, and the packaging temperature response characteristics are analyzed.

I. Introduction

Voltage is the most basic and important electrical parameter of circuit and signal. RMS, average and peak are important electrical parameters of AC voltage. RMS is an important parameter reflecting the size of power, and its monitoring is very important. With the development of power electronic converter technology toward high frequency, the higher harmonic component of voltage waveform in motor and power system increases, the waveform distortion becomes more and more severe, and the monitoring of voltage effective value becomes more difficult. At present, the measurement methods of RMS mainly include thermal equivalent method, numerical analysis and calculation method, average method, true RMS (TRMS) method and so on. Thermal equivalent method is the most accurate measurement method, and its measured frequency band is wider.