Search International and National Patent Collections

1. (WO2017156116) HYBRID ELECTRIC MOTOR FOR ELECTRIC SUBMERSIBLE PUMP

Pub. No.:    WO/2017/156116    International Application No.:    PCT/US2017/021343
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Mar 09 00:59:59 CET 2017
IPC: H02K 1/27
F04D 13/10
F04D 13/06
F04D 29/02
E21B 43/12
Applicants: BAKER HUGHES INCORPORATED
Inventors: KHOTSYANOV, Ivan D.
CAIN, Sean A.
TRAN, Thien Q.
LI, Yong
KNAPP, John M.
Title: HYBRID ELECTRIC MOTOR FOR ELECTRIC SUBMERSIBLE PUMP
Abstract:
Systems and methods for constructing electric motors including both permanent magnet elements and inductive elements. In one embodiment, a motor is implemented of an ESP system has multiple rotor sections that are mounted end-to-end within the bore of the stator. The permanent magnet elements and inductive elements may be combined within individual rotor sections, or they may be segregated so that one rotor section has only one type or the other. The inductive elements of the rotor allow the motor to be started without a VFD, and without knowing the position of the rotor within the motor. The permanent magnet elements synchronize the rotor with the rotating stator fields when the rotor approaches the operating frequency of the drive.