A unique system for reducing high frequency stray noise and transient common mode ground currents to zero, while enhancing other ground issues

Author

Jacky, R.E. ; Hopkins, R.W. ; Panko, M.S.

Author_Institution

LLC, Woodridge, IL

fYear

2005

fDate

26-26 Oct. 2005

Firstpage

191

Lastpage

193

Abstract

Variable frequency drives generate high frequency switching electrical noise. The components of a typical variable frequency drive are commonly capacitively coupled to an earth ground. The power devices used today allow high frequency currents and common mode currents to circulate within earth ground. These circulating currents initiate the degradation process to insulation systems of motors, their bearings, and also interference to other systems (ie: sensors, PLC´s, industrial computers etc.). This new wiring design and method meet safety ground code requirements while reducing significantly high frequency and common mode ground currents. In this paper we will discuss the key components and operation of such a system and its application

Keywords

earthing; interference suppression; machine bearings; machine insulation; motor drives; safety; variable speed drives; wiring; ASD; BJT; HVAC; IGBT; PWM; capacitive coupling; earth grounding; motor insulation degradation; power devices; safety; stray noise; transient current; variable frequency drive; wiring design; Computer industry; Couplings; Degradation; Frequency; Insulation; Interference; Noise generators; Noise reduction; Programmable control; Sensor systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Proceedings

Conference_Location

Indianapolis, IN

Print_ISBN

0-7803-9145-4

Type

conf

DOI

10.1109/EEIC.2005.1566288

Filename

1566288