公开(公告)号：EP1459435B1

公开(公告)日：2012-05-02

申请号：EP02804292.7

申请日：2002-12-02

申请人： Iskra Wind Turbines Ltd.

发明人： WASTLING, Michael, Andrew ,  BALSON, John, Charles ,  CANN, Robert, James ,  IRVING, David

IPC分类号： H02P3/22 ,  F03D7/02 ,  H02K3/47 ,  H02K21/24 ,  H02P3/12 ,  F03D7/04

CPC分类号： H02K3/47 ,  F03D7/0268 ,  F05B2240/511 ,  H02K3/04 ,  H02K7/106 ,  H02K11/0094 ,  H02K21/24 ,  H02P3/12 ,  Y02E10/723

摘要： A synchronous alternating current generator incorporates a braking mechanism which comprises a coil (21) providing a predetermined inductance and a predetermined resistance, and switch means (22) for connecting the coil across an output of the generator.

公开(公告)号：EP1478849B1

公开(公告)日：2007-07-18

申请号：EP02702488.4

申请日：2002-02-25

申请人： Iskra Wind Turbines Ltd.

发明人： WASTLING, Michael, Andrew ,  BALSON, John, Charles ,  IRVING, David ,  CANN, Robert, James

IPC分类号： F03D7/02

CPC分类号： F03D7/0256 ,  F03D7/0224 ,  F03D7/0268 ,  F05B2260/74 ,  F05B2260/75 ,  F05B2260/77 ,  F05B2260/78 ,  F05B2270/1011 ,  F05B2270/1071 ,  Y02E10/723

摘要： A wind turbine has its blades (1) arranged so that they can pitch towards stall against the action of a spring (15) or other resilient device. The centrifugal loading on the blades (1) acts against the spring (15) in a direction to shed power by pitching the blades (1) towards the stall. The torque loading provided by the generator or other power conversion device acts to pitch the blades (1) in the opposite direction, so as to reduce the amount of load shedding whenever the power is being extracted from the wind turbine.