Industrial Motors diagnostic equipment is highly dependent on the automation system, so if there are defects in the automation equipment, it can only rely on the operator’s intuitive judgment.To help with intuitive judgment, Park’s Vactor Approach(PVA) represents the current signal as a pattern of circles, so it can tell if a fault occurs when the circle is distorted. However, the failure to judge the degree of distortion of the circle pattern is the basis of the fault, so it will face difficulties. In this paper, in order to compare the faults of PVA, the period of d-axis current of PVA pulsation was mastered, so that two phase differences occurred in the same signal source. Through experiments, it is confirmed that this is a 90 degree cross formation of PVA, which is convenient for judging from the vision that there is no fault, thus helping the operator to make intuitive judgment.

Abstract
1. 서 론
2. 실험환경 및 조건
    2.1 실험환경
    2.2 실험조건
3. PVA
4. Clarke 변환과 PVA의 관계
5. 가시성을 위한 PVA 패턴생성 방법
6. 결 론
7. References

• 고영진(순천제일대학교 전기자동화과) | Yeong-Jin Goh (Department of Electrical and Automation Engineering, Suncheon Jeil College) Corresponding Author
• 강인원(청암대학교 소방안전관리과) | In-Won Kang (Department of Fire safety and Management, Cheongam College)