WO2011019334A1 - Permanent magnet motor for subsea pump drive - Google Patents
Permanent magnet motor for subsea pump drive Download PDFInfo
- Publication number
- WO2011019334A1 WO2011019334A1 PCT/US2009/053366 US2009053366W WO2011019334A1 WO 2011019334 A1 WO2011019334 A1 WO 2011019334A1 US 2009053366 W US2009053366 W US 2009053366W WO 2011019334 A1 WO2011019334 A1 WO 2011019334A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump drive
- subsea pump
- motor
- rotor
- drive motor
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/064—Details of the magnetic circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
Definitions
- the invention relates generally to subsea pumping systems and methods, and more specifically a canned permanent magnet motor for a subsea pump drive.
- the subsea pumping system should have an overall efficiency that is greater than known subsea pumping systems utilizing induction motors, such that the subsea pumping system could function using a low power rating umbilical. It would be further advantageous if the subsea pumping system had a higher power factor lhan known subsea pumping systems utilizing induction motors, such that me subsea pumping system could function using a low power rating topside variable frequency convener.
- a subsea pump drive motor comprises a stator, a rotor comprising a plurality of permanent magnet pole pieces, and a non-magnetic can configured to affix the pole pieces to the rotor.
- a subsea pump drive system comprises a permanent magnet subsea pump drive motor having a rotor configured with a plurality of permanent magnet pole pieces, the rotor and plurality of pole pieces disposed within a non-magnetic can configured to prevent corrosion of the rotor and plurality of pole pieces.
- a method of controlling a subsea pump comprises: providing a permanent magnet (PM) subsea pump drive motor, and controlling the PM drive motor such that the PM drive motor drives a subsea pump in response to variable frequency converter signals received fay the PM drive motor.
- Figure 1 illustrates a permanent magnet motor subsea pump drive according to one embodiment of the invention
- Figure 2 illustrates the permanent magnet motor subsea pump drive depicted in Figure 1, but that does not have a wireless transmitter such as depicted in Figure 1;
- Figure 3 illustrates in more detail, the rotor portion of the magnet motor depicted in Figures 1 and 2, according to one embodiment
- Figure 4 is a cross-sectional view of the permanent magnet motor depicted in Figures 1 and 2, according to one embodiment
- Figure 5 illustrates a permanent magnet motor subsea pump drive according Io another embodiment of the invention.
- FIG. 6 the permanent magnet motor subsea pump drive depicted in
- FIG. 1 illustrates a permanent magnet motor subsea pump drive 10 according to one embodiment of the invention.
- Subsea pump drive 10 includes a permanent magnet motor 12 comprising a stator 14 and a rotor 16. Windings 20 are disposed in stator slots.
- the rotor 16 comprises a plurality of permanent magnet (PM) poles described herein below with reference to Figures 3 and 4.
- the rotor 16 also includes anon-magnetic can configured to fix the permanent magnets to the rotor 16, also described further herein below with reference to Figure 3.
- blades 22 are disposed on the rotor shaft 24. These blades 22 are configured to pump cooling fluid 26 flowing through a motor sealing can 28 that encapsulates both the stator 14 and the rotor 16 according to one aspect of the invention illustrated in Figures 5 and 6, where both the stator 14 and the rotor 16 are canned for corrosion protection when processed fluid is used for cooling.
- Hie cooling fluid 26 works to provide cooling of the stator 14, rotor 16, and the associated bearings.
- the stator 14 is not canned, and the machine cavity 30 is filled with a clean cooling fluid having a suitable thermal conductivily while also possessing workable electrical insulation characteristics.
- a heat exchanger 34 operates to transfer heat from the motor 12 to outside seawater.
- a rotor 16 position signal generated via an encoder 32 is transferred to a variable frequency converter (VFD) 35 via a wireless signal transmitter 36 according to one embodiment.
- VFD variable frequency converter
- the rotor position signal is transferred to a VFD via a suitable communication cable (40).
- the encoder 32 is connected to one end of rotor shaft 24 to detector rotor position for proper speed/torque control of the permanent magnet motor 12.
- Traditional control approaches utilizing communication cables are difficult to employ when the VFD 35 is far away from me motor 12 due to signal attenuation along cables between the motor 12 and the VFD 35. Further, traditional sensoriess control approaches also face challenges due to difficulties associated with accurate measurement of motor terminal voltages through such long distances.
- the foregoing challenges associated with traditional control approaches utilizing communication cables are overcome using a wireless signal transmitter 36, discussed herein above.
- the rotor position signals are sent to the wireless signal transmitter 36, which then transmits the rotor position signals to a topside controller/VFD 35 that is used to drive the PM motor 12.
- Figure 2 illustrates ihe permanent magnet motor s ⁇ bsea pump drive depicted in Figure 1, but that does not have a wireless transmitter such as depicted in Figure 1.
- the rotor position signal is transferred through suitable communication wires 40.
- This topology is especially useful when a long cable is not required, i.e. a subsea VFD 38 is employed and is located in dose proximity to the PM motor 12.
- a subsea pump 40 such as a multiphase pump.
- a seal 42 between the motor 12 and pump 40 to block motor cooling fluid 26 from flowing into the pump 40.
- the fluid pressure inside the motor 12 is normally maintained higher than the fluid pressure inside the pump 40 via a pressurizer typically located subsea beside the motor 12, such as described below with reference to Figures 5 and 6, to prevent any processed fluid 44 flowing into the motor side from the pump side.
- Any motor cooling fluid leakage that may pass from the motor side into the pump side that occurs during motor-pump set rotation is replenished via a topside fluid tank 46 that is connected to the subsea motor 12 through an umbilical supply line 48 to provide cooling fluid as needed.
- FIG 3 illustrates in more detail, the rotor 16 portion of the permanent magnet motor 12 depicted in Figures 1 and 2. according to one embodiment.
- a nonmagnetic can 50 that is constructed from a suitable nonmagnetic material such as, without limitation, incond or aluminum, is configured to attach a plurality of magnets 52 to the rotor core or back iron portion 54 of the rotor 16, and to protect each magnet from corrosion.
- the back iron portion 54 is constructed from a suitable ferromagnetic material.
- Figure 4 is a cross-sectional view of the permanent magnet motor 12 depicted in Figures 1 aad 2, according to one embodiment.
- One portion of the motor shaft 24 is encapsulated via the rotor core 54.
- the permanent magnets 52 having north and south poles, are attached to the rotor core 54 via the rotor can 50.
- Slater laminations 56 having slots 58 surround the rotor can 50.
- FIG. 5 illustrates a permanent magnet motor subsea pump drive 100 according to another embodiment of the invention.
- Pump drive 100 includes a permanent magnet motor 102 that is cooled using the fluid 44 processed by the subsea pump 40.
- Subsea pump drive 100 does not require a topside storage tank or associated umbilical cooling fluid supply line such as employed by pump drive 10 described above with reference to Figures 1 and 2.
- a pressurizer 104 is employed to maintain a positive pressure from the motor 12 to the subsea pomp 40 under all conditions.
- An optional liquid storage tank 106 can be used to store processed fluid 44 for motor cooling purposes when the processed fluid is purely gas.
- the stator 14 is also encapsulated via a can 108 to prevent any process fluid 44 or gas from entering the stator 14 portion of the permanent magnet motor 102.
- This stator can 108 is filled wilh a dean cooling fluid 26, such as a suitable oil, to cool me stator 14.
- a heat exchanger 34 can be enjoyed to exchange heat from the motor 102 to outside seawater.
- Subsea pump drive 100 also employs an encoder 32 mat is connected to one end of rotor shaft 24 to detector rotor position for proper speed/torque control of the permanent magnet motor 102.
- a rotor 16 position signal generated via the encoder 32 is transferred to a variable frequency converter (VFD) 35 via a wireless signal transmitter 36 according to one embodiment
- VFD variable frequency converter
- the rotor position signal is transferred to a VFD 38 via a suitable communication cable (40) and does not have a wireless transmitter such as depicted in Figure 5.
- a subsea pump drive employs a permanent magnet (PM) motor to drive a subsea pump.
- the PM motor rotor in one embodiment is canned with a non-magnetic material such as inconel, that can provide a desired level of corrosion protection.
- the PM motor provides a subsea pump drive that is smaller and more efficient, having a high power factor than a subsea pump drive utilizing a conventional induction motor.
- the PM motor subsea pump drive eliminates the necessity for a topside storage tank and associated fluid transfer lines when the motor rotor is cooled with processed fluid.
- the PM subsea pump drive motor achieves its high efficiency due to the permanent magnetic flux on the rotor linking the st ⁇ for so that the PM motor can achieve higher efficiency due to absence of rotor current.
- the PM s ⁇ bs ⁇ a pump drive motor further has an increased power factor due to the absence of exciting current
- the PM subsea pump drive motor employs lower power umbilical features due to the aforesaid high power factor and high motor efficiency.
- the PM subsea pump drive motor employs a lower power topside variable frequency converter due to the aforesaid high power factor and high motor efficiency.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09791362A EP2464875A1 (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
PCT/US2009/053366 WO2011019334A1 (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
SG2012009379A SG178355A1 (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
CN2009801609461A CN102472286A (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2009/053366 WO2011019334A1 (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011019334A1 true WO2011019334A1 (en) | 2011-02-17 |
Family
ID=41828303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/053366 WO2011019334A1 (en) | 2009-08-11 | 2009-08-11 | Permanent magnet motor for subsea pump drive |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2464875A1 (en) |
CN (1) | CN102472286A (en) |
SG (1) | SG178355A1 (en) |
WO (1) | WO2011019334A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012163996A2 (en) | 2011-05-31 | 2012-12-06 | Fmc Kongsberg Subsea As | Subsea compressor directly driven by a permanent magnet motor with stator and rotor submerged in liquid |
CN103187829A (en) * | 2011-12-30 | 2013-07-03 | 哈米尔顿森德斯特兰德空间系统国际有限公司 | Cooling of permanent magnet motor |
WO2016057934A1 (en) * | 2014-10-09 | 2016-04-14 | Direct Drive Systems, Inc. | Permanent magnet motor control for electric subsea pump |
US11053954B2 (en) | 2018-08-28 | 2021-07-06 | Hawe Hydraulik Se | Modular motor pump unit |
US11808268B2 (en) | 2020-10-19 | 2023-11-07 | Milwaukee Electric Tool Corporation | Stick pump assembly |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013201778A1 (en) * | 2013-02-04 | 2014-08-07 | Siemens Aktiengesellschaft | Electric machine with stand direct cooling |
CN107002688B (en) * | 2014-05-19 | 2019-03-29 | 通用电气石油和天然气Esp公司 | Optimization for the motor in artificial lift is cooling |
EP3763943A1 (en) | 2019-07-10 | 2021-01-13 | Grundfos Holding A/S | Method for manufacturing a can |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2556435A (en) * | 1950-04-27 | 1951-06-12 | Layne & Bowler Inc | Means for cooling lubricating oil in submerged motors |
DE1030441B (en) * | 1956-04-07 | 1958-05-22 | Ritz & Schweizer Geb | Liquid cooling of the electric drive motor of a submersible motor pump |
EP0163126A1 (en) * | 1984-05-02 | 1985-12-04 | Pompe Ing. Calella S.p.A. | Electric pumping device |
EP1826887A2 (en) * | 2006-02-24 | 2007-08-29 | General Electric Company | Methods and apparatus for using an electrical machine to transport fluids through a pipeline |
WO2007110271A1 (en) * | 2006-03-24 | 2007-10-04 | Siemens Aktiengesellschaft | Compressor unit and use of a cooling medium |
EP1843449A1 (en) * | 2006-04-07 | 2007-10-10 | General Electric Company | Compressor motor with a permanent magnet rotor for transporting a fluid in a pipeline |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5795135A (en) * | 1995-12-05 | 1998-08-18 | Westinghouse Electric Corp. | Sub-sea pumping system and an associated method including pressure compensating arrangement for cooling and lubricating fluid |
GB0314553D0 (en) * | 2003-06-21 | 2003-07-30 | Weatherford Lamb | Electric submersible pumps |
-
2009
- 2009-08-11 CN CN2009801609461A patent/CN102472286A/en active Pending
- 2009-08-11 SG SG2012009379A patent/SG178355A1/en unknown
- 2009-08-11 WO PCT/US2009/053366 patent/WO2011019334A1/en active Application Filing
- 2009-08-11 EP EP09791362A patent/EP2464875A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2556435A (en) * | 1950-04-27 | 1951-06-12 | Layne & Bowler Inc | Means for cooling lubricating oil in submerged motors |
DE1030441B (en) * | 1956-04-07 | 1958-05-22 | Ritz & Schweizer Geb | Liquid cooling of the electric drive motor of a submersible motor pump |
EP0163126A1 (en) * | 1984-05-02 | 1985-12-04 | Pompe Ing. Calella S.p.A. | Electric pumping device |
EP1826887A2 (en) * | 2006-02-24 | 2007-08-29 | General Electric Company | Methods and apparatus for using an electrical machine to transport fluids through a pipeline |
WO2007110271A1 (en) * | 2006-03-24 | 2007-10-04 | Siemens Aktiengesellschaft | Compressor unit and use of a cooling medium |
EP1843449A1 (en) * | 2006-04-07 | 2007-10-10 | General Electric Company | Compressor motor with a permanent magnet rotor for transporting a fluid in a pipeline |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012163996A2 (en) | 2011-05-31 | 2012-12-06 | Fmc Kongsberg Subsea As | Subsea compressor directly driven by a permanent magnet motor with stator and rotor submerged in liquid |
US10794386B2 (en) | 2011-05-31 | 2020-10-06 | Fmc Kongsberg Subsea As | Subsea compressor directly driven by a permanent magnet motor with stator and rotor submerged in liquid |
CN103187829A (en) * | 2011-12-30 | 2013-07-03 | 哈米尔顿森德斯特兰德空间系统国际有限公司 | Cooling of permanent magnet motor |
WO2016057934A1 (en) * | 2014-10-09 | 2016-04-14 | Direct Drive Systems, Inc. | Permanent magnet motor control for electric subsea pump |
AU2015330672B2 (en) * | 2014-10-09 | 2018-10-04 | Direct Drive Systems, Inc. | Permanent magnet motor control for electric subsea pump |
US10263547B2 (en) | 2014-10-09 | 2019-04-16 | Direct Drive Systems, Inc. | Permanent magnet motor control for electric subsea pump |
US11053954B2 (en) | 2018-08-28 | 2021-07-06 | Hawe Hydraulik Se | Modular motor pump unit |
US11808268B2 (en) | 2020-10-19 | 2023-11-07 | Milwaukee Electric Tool Corporation | Stick pump assembly |
Also Published As
Publication number | Publication date |
---|---|
EP2464875A1 (en) | 2012-06-20 |
CN102472286A (en) | 2012-05-23 |
SG178355A1 (en) | 2012-03-29 |
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