Abstract
Most of the failures of induction motors become insulation faults, causing a permanent damage. Using differential current transformers, a system capable of insulation fault detection was developed, based on the differential relay protection scheme. Both signal injection and fault detection circuitry were integrated in a single chip. The proposed scheme is faster than other existing protection and not restricted to protect induction motors, but several other devices (such as IGBTs) and systems. This paper explains the principle of operation of fault protection scheme and analyzes an integrated implementation through simulations and experimental results. A power-integrated circuit (PIC) implementation is presented.
Highlights
Nowadays, induction motors are the most frequently used drives for motion control systems in industrial applications [1]
It is shown that this system could be used as a preventive offline protection system and online monitoring of the homopolar current component to detect sudden insulation faults from phase to ground
To detector (b) the injected and detected signals and prove the fast detection, with a delay of the order of 1 μs. Even though this test was made with a single-phase resistive load, it is representative of the use of the designed power-integrated circuit (PIC) as fault to ground protection of generic polyphase circuitry with any kind of linear load and sinusoidal low frequency or DC supply voltage referenced to ground
Summary
Induction motors are the most frequently used drives for motion control systems in industrial applications [1]. On the contrary online methods are those used to monitor adjustable speed drive systems in a continuous fashion They provide more accurate and reliable information about the state of the insulation and the remaining service life of the machine than the offline tests. The possibility to test the performance of the leakage current protection subsystem was given by an integrated circuit design award This allows the future use of this IP together with the HDL IP developed [12, 13] in the past at LABCATyP to integrate a complete controller. It is shown that this system could be used as a preventive offline protection system and online monitoring of the homopolar current component to detect sudden insulation faults from phase to ground. Simulation and experimental results are presented in order to validate the functionality of the design
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
