An integrated method for three-phase AC excitation and high-frequency voltage signal injection for sensorless starting of aircraft starter/generator

Jiadan Wei, Hua Xu, Bo Zhou, Zhuoran Zhang, Chris Gerada

Research output: Journal PublicationArticlepeer-review

28 Citations (Scopus)

Abstract

This paper proposes an integrated method of three-phase ac excitation and high-frequency voltage signal injection (HFVSI) for sensorless controlled starting of brushless synchronous machines (BSM) used as starter/generator in variable frequency ac power systems of civil aircraft. Fixed 400 Hz of the three-phase ac power is adopted both for the ac excitation and HFVSI in the initial starting process to eliminate the bulky rotor position sensor for BSM. The resulting 6th sequence harmonic voltage determined by the rotating rectifier is utilized as the HFVSI into the field-winding of main generator without any extra high-frequency signal injection. The rotor position is estimated by the high-frequency response signals extracted from the armature windings of main generator. Due to the nonlinear rotating rectifier linked in the HFSI chain, a novel frequency-insensitive asynchronous demodulation strategy is proposed in this paper for rotor position estimation. Furthermore, the initial rotor position detection is calibrated by polarity decision of the induced currents of the armature windings within the establishment procedure of field current of the main generator at standstill. The effectiveness of the ac excitation and feasibility of rotor position estimation for sensorless starting control of BSM are validated by the simulation and experimental results.

Original languageEnglish
Article number8476619
Pages (from-to)5611-5622
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number7
DOIs
Publication statusPublished - Jul 2019
Externally publishedYes

Keywords

  • Asynchronous demodulation strategy
  • brushless synchronous machine (BSM)
  • initial rotor position detection
  • sensorless controlled starting

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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