公开(公告)号：US10700578B2

公开(公告)日：2020-06-30

申请号：US15858043

申请日：2017-12-29

Applicant: ABB Schweiz AG

Inventor： Ghanshyam Shrestha ,  Chenjie Lin ,  Mehanathan Pathmanathan ,  Pedro Rodriguez

IPC: H02K11/042 ,  H02K3/20 ,  H02K21/04 ,  H02K19/28

Abstract: Unique systems, methods, techniques and apparatuses of an exciterless synchronous generator are disclosed. One exemplary embodiment is an exciterless synchronous generator comprising a stator, a rotor, and a startup excitation system. The stator includes a set of stator windings. The rotor includes an energy harvest winding, a DC power supply including a DC bus and coupled to the energy harvest winding, and a field winding coupled to the DC power supply. The startup excitation system comprises one of a magnetic field generation system structured to generate a magnetic field received by the energy harvest winding in response to a rotation of the rotor, wherein the magnetic field is converted to DC power with the DC power supply and transmitted to the field winding; or a rotor DC power source including and diode coupled in series across the DC bus.

公开(公告)号：US10608508B2

公开(公告)日：2020-03-31

申请号：US15718568

申请日：2017-09-28

Applicant: ABB Schweiz AG

Inventor： Chenjie Lin ,  Ghanshyam Shrestha ,  Jing Xu ,  Joonas Puukko

IPC: H02K11/042 ,  H02K19/28 ,  H02K19/12 ,  H02K11/33 ,  H02K3/20 ,  H02K11/04

Abstract: Unique systems, methods, techniques and apparatuses of an exciterless synchronous machine are disclosed. One exemplary embodiment is a salient pole rotor for an electric machine including one set of pole pairs including a first, second, and third pole pair; a field winding; a set of energy harvest windings, each winding mounted to each of the plurality of pole pairs and structured to receive a harmonic component of AC power from a stator; and a DC power supply structured to receive the harmonic component from the set of energy harvest windings, convert the harmonic component to DC power, and output the DC power to the field winding. The set of energy harvest windings are arranged in a first sequence on the first pole pair, a second sequence on the second pole pair, and a third sequence on the third pole pair, and each sequence is different.

公开(公告)号：US20190207492A1

公开(公告)日：2019-07-04

申请号：US16223971

申请日：2018-12-18

Applicant: ABB Schweiz AG

Inventor： Chenjie Lin ,  Matthew Henricksen ,  Ghanshyam Shrestha ,  Elio Alberto Perigo

IPC: H02K21/02 ,  H02K1/27 ,  H02K21/14

CPC classification number: H02K21/028 ,  H02K1/276 ,  H02K21/14

Abstract: A permanent magnet motor is provided that produces variable magnetic flux. The motor may include two different types of permanent magnets with different coercivities. The magnetic state of one of the magnets may be altered during use. In one state, the effective magnetic flux of the motor is greater, and in another state, the effective magnetic flux of the motor is less.

公开(公告)号：US20180034396A1

公开(公告)日：2018-02-01

申请号：US15726443

申请日：2017-10-06

Applicant: ABB Schweiz AG

Inventor： Ghanshyam Shrestha ,  Darren Tremeling ,  Waqas Arshad ,  Wen Ouyang ,  Jan Westerlund

IPC: H02P9/30 ,  H02K3/28 ,  H02K19/12 ,  H02K11/042

CPC classification number: H02P9/302 ,  H02K3/20 ,  H02K3/28 ,  H02K11/042 ,  H02K19/12

Abstract: A synchronous machine and related systems include a stator and rotor separated by an air gap. The rotor includes a rotating DC power supply coupled to exciter windings disposed adjacent the air gap. Power from air gap harmonics, including air gap slot harmonics induce current in the exciter windings, which is rectified and supplied to the rotor field windings. In operation, a desired current level in the rotor field windings can be achieved through control of the DC power supply or superposition of harmonics into the stator winding current which induces the prescribed current in exciter windings.