access icon free Verification of effect of secondary conductor bar on starting characteristics in line-start type self-excited wound-field synchronous motor

© The Institution of Engineering and Technology
Received 19/06/2020, Accepted 15/12/2020, Revised 17/11/2020, Published 15/01/2021

This study clarifies experimentally the effect of the secondary conductor bar on line-start characteristics in a line-start type self-excited wound-field synchronous motor. This motor is based on a brushless wound-field synchronous motor having a rotor winding connected to a diode rectifier circuit. And it has a secondary conductor bar that is independently connected at a pitch of one pole, without end-ring. First, the operation principle of the proposed motor and its magnetic circuit design are described, and then the details of the prototype for principle verification are clarified. Next, when the combination of the connecting of the secondary conductor bar is changed, an experiment of line-starting characteristics and measured rotor field current is demonstrated. Consequently, it was clarified that the influence on the synchronous pull-in, speed ripple, and rotor field current.

Inspec keywords: finite element analysis; magnetic circuits; stators; synchronous motors; rotors; rectifying circuits

Other keywords: line-start characteristics; line-starting characteristics; brushless wound-field synchronous motor; line-start type self-excited wound-field synchronous motor; secondary conductor bar

Subjects: Finite element analysis; Synchronous machines; Control of electric power systems

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