Discharge Characteristics and Mechanism of Bubble Flow in FC-72 Under Unipolar Repetitive Pulse Voltage

This article investigates the discharge characteristic of the bubble flow in FC-72 under unipolar repetitive pulsed voltage, which supports the insulation design of two-phase cooling in an HV power electronic device. The effect of thermal bubble flow on the insulation of FC-72 refrigerant was evalua...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2022-04, Vol.29 (2), p.709-717
Main Authors: Mo, Shenyang, Wei, Xiaoyun, Zhang, Jinqiang, Li, Xuebao, Zhao, Zhibin
Format: Article
Language:English
Subjects:
Bubble flow
Couplings
Discharge
Discharges (electric)
Electric fields
Electric potential
FC-72
Heating systems
Insulation
nonuniform electric field
Optical pulses
partial discharge (PD)
Partial discharges
phase-change cooling
repetitive unipolar pulsed voltage
Threshold voltage
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article investigates the discharge characteristic of the bubble flow in FC-72 under unipolar repetitive pulsed voltage, which supports the insulation design of two-phase cooling in an HV power electronic device. The effect of thermal bubble flow on the insulation of FC-72 refrigerant was evaluated. According to the partial discharge (PD) characteristics, it is found that there are two stages in the discharge characteristics of the bubble flow as voltage rises. Combining the PD inception voltages of FC-72 vapor under unipolar pulse voltage and dc voltage, it reveals the discharge thresholds of the vapor inside the bubble under the transient electric field and the steady electric filed, respectively, which proves the mechanism of the staged PD evolution. Based on the motion calculation of the bubble, the PD probability of the bubble flow within a voltage period is analyzed. It simulates the phase-resolved PD pattern, which reveals the PD mechanism of the bubble flow. The research provides a reference for the insulation design for the two-phase cooling technology in power electronics.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2022.3163802