Abstract
This paper presents an analysis of the drive mechanism of an AC three-phase electromagnetic contactor. One of the keyfeature of the drive mechanism is the strength characteristic, which has been established from experimental tests. A good correlation between strength torque characteristic and the mechanical characteristics of the drive coil for different voltage supply (from 1.1 to 0.7 of rated voltage) has been observed. The recorded oscillograms of the time evolution of the trip of the movable armature, allow to obtain the connection time and the disconnection time of the contactor. Also, the drive coil has been supplied with variable voltage (from 1.1 to 0.7 of rated voltage). The connection and disconnection times are important parameters related to the contactor behaviour from mechanical point of view. Keywords: Electromagnetic Contactor, Drive Mechanism, Trip Characteristic.
Highlights
Contactors with AC coils are among the most widely utilized electromechanical devices in industry
The fight for ecological solutions is lead in every technical field
This characteristic can be used with the aim to optimize the response time of the drive mechanism
Summary
Contactors with AC coils are among the most widely utilized electromechanical devices in industry. A fast and effective method for detecting and isolating faults in multi-terminal medium voltage dc shipboard power distribution systems is presented in [16, 17] This method allows converters and contactors to use only local measurements when deciding whether or not to trip in order to isolate the faulted section. The analytical study of the behaviour of the power contactors drive mechanism during dynamic switching conditions, requires a mathematical model and an experimental model in order to validate the proposed mathematical ones. The strength characteristic of the drive mechanism, in the case of a power contactor means the variation of the resultant strength force FR vs the air gap δ This characteristic has discontinuities because of the prestressed springs of the main contacts and auxiliary contacts, Figure 1
Sign-in/Register to view highlights & summary 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.
