IP Library Granted Patent US 7,109,600
Granted Patent B1
US 7,109,600 · App. 11/419,299 · Granted Sep 19, 2006

Direct drive wind turbine

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,109,600
App. No.
11/419,299
Granted
Sep 19, 2006
Kind
B1
Abstract

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Claims (26)

1. A method for transferring electrical power from a wind turbine comprising the steps of:

rotating blades using wind;

rotating a generator;

generating electricity with said generator;

supporting said generator with a tower;

suspending a transformer adjacent said generator;

damping the movement of said tower by contacting said transformer;

transmitting said electricity through said transformer.

2. The method of claim 1 wherein said damping is accomplished by contacting said transformer with said tower.

3. The method of claim 1 wherein said damping is accomplished by contacting said transformer with a viscous fluid connected to said tower.

4. The method of claim 1 further comprising the step of converting the frequency of said electricity.

5. The method of claim 4 further comprising the step of rotating said wind turbine such that said blades are facing into the wind.

6. The method of claim 5 further comprising the step of applying a brake to said generator opposite said blades.

7. A method for operating a wind turbine comprising the steps of:

rotating a plurality of blades;

generating variable frequency electrical power by the rotation of said plurality of blades;

converting said variable electrical power from a first electrical characteristic to a second electrical characteristic;

transferring said electrical power with said second electrical characteristic to a transformer suspended from a nacelle bedplate;

damping the oscillations of said wind turbine with said transformer.

8. The method of claim 7 wherein said first electrical characteristic is a frequency between 10 and 30 Hz.

9. The method of claim 8 wherein said second electrical characteristic is a frequency between 50 and 60 Hz.

10. The method of claim 8 wherein said oscillations are damped by the contacting of said transformer against the wall of a tower.

11. The method of claim 8 wherein said oscillations are damped by the movement of said transformer in a viscous fluid.

12. The method of claim 9 further comprising the step of transforming said variable electrical power from an alternating current to a direct current.

13. The method of claim 12 further comprising the step of transforming said direct current to an alternating current.

14. The method of claim 13 wherein said transformer is either a dry-type or oil-filled transformer.

Assignments (10)
SECURITY INTEREST Recorded Sep 17, 2018
From: NORTHERN POWER SYSTEMS, INC.
To: COMERICA BANK
Reel/Frame 046888/0822 →
MERGER Recorded Mar 18, 2014
From: NORTHERN POWER SYSTEMS UTILITY SCALE, INC.
To: NORTHERN POWER SYSTEMS, INC.
Reel/Frame 032461/0921 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 16, 2011
From: NORTHERN POWER SYSTEMS, INC.
To: WIND POWER HOLDINGS, INC.
Reel/Frame 027403/0650 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 16, 2011
From: WIND POWER HOLDINGS, INC.
To: NORTHERN POWER SYSTEMS UTILITY SCALE, INC.
Reel/Frame 027403/0657 →
AFFIDAVIT OF RELEASE OF SECURITY INTERESTS Recorded Nov 23, 2011
From: MARK, ELLIOT J.
To: NORTHERN POWER SYSTEMS, INC.
Reel/Frame 027280/0699 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 14, 2008
From: NORTHERN POWER SYSTEMS, INC.
To: CB WIND ACQUISITION CORP.
Reel/Frame 021824/0753 →
CHANGE OF NAME Recorded Nov 14, 2008
From: CB WIND ACQUISITION CORP.
To: NORTHERN POWER SYSTEMS, INC.
Reel/Frame 021838/0255 →
SECURITY AGREEMENT Recorded Jun 8, 2007
From: NORTHERN POWER SYSTEMS, INC.
To: PERSEUS PARTNERS VII, L.P.
Reel/Frame 019399/0410 →
CONFIRMATORY LICENSE Recorded Dec 15, 2006
From: NORTHERN POWER SYSTEMS
To: UNITED STATES DEPARTMENT OF ENERGY
Reel/Frame 018672/0845 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2006
From: DANFORTH, WILLIAM; BYWATERS, GARRETT LEE; BEVINGTON, CHRISTOPHER; STOWELL, JESSE; COSTIN, DANIEL
To: NORTHERN POWER SYSTEMS, INC.
Reel/Frame 017643/0961 →