1
Amir S Mikhail, Craig L Christenson, Kevin L Cousineau, William L Erdman, William E Holley: Variable speed wind turbine generator. Zond Energy Systems, Blakely Sokoloff Taylor & Zafman, October 24, 2000: US06137187 (117 worldwide citation)

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...


2
Amir S Mikhail, Craig L Christenson, Kevin L Cousineau, William L Erdman, William E Holley: Variable speed wind turbine generator. Zond Energy Systems, Blakely Sokoloff Taylor & Zafman, July 16, 2002: US06420795 (86 worldwide citation)

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...


3
Michael S Selig, Kyle K Wetzel: Air foil configuration for wind turbine. Zond Energy Systems, Blakely Sokoloff Taylor & Zafman, January 7, 2003: US06503058 (20 worldwide citation)

A balancing of aerodynamic optimization and structural optimization provides a wind turbine airfoil having substantially improved performance characteristics. Mathematic modeling yields maximum aerodynamic criteria that are coupled with a structural analysis to modify the optimum aerodynamic design ...


4
Mikhail Amir S, Christenson Craig L, Cousineau Kevin L, Erdman William L, Holley William E: Variable speed wind turbine generator. Zond Energy Systems, June 14, 2000: EP1007844-A1 (7 worldwide citation)

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator (620), a torque controller (623) and a proportional, integral derivative (PID) pitch controller (1010). The torque controller controls generator torqu ...


5
Richardson Robert D, Erdman William L: Variable speed wind turbine. Zond Energy Systems, December 16, 1998: EP0884833-A1 (2 worldwide citation)

A variable speed wind turbine having a generator controller coupled to a power converter with active switches operable for controlling stator electrical quantities for a multiphase generator of the turbine to enable control of the torque in the wind turbine.


6
Hallidy William M: Variable speed constant frequency synchronous electric power generating system and method of using same. Zond Energy Systems, May 31, 2000: EP1005149-A1

A variable speed constant frequency synchronous electrical generating system includes a generator rotor (33) with a polyphase field winding (35) whereby the position of the electromagnetic field relative to the rotor structure (33) can be controllably varied. The system includes means (48) to substa ...


7
Lipo Thomas A, Li Yue: Doubly-salient permanent-magnet machine. Zond Energy Systems, January 7, 1998: EP0815633-A1

A doubly-salient permanent-magnet machine includes an annular rotor (102) interposed between a pair of laterally disposed stators (100, 104). The rotor (102) includes a plurality of permanent magnets (106) alternating with electromagnetically-salient poles (108) made of steel. Each stator (100, 104) ...


8
Mikhail Amir S, Christenson Craig L, Cousineau Kevin L, Erdman William L, Holley William E: Generatrice pour eolienne a vitesse variable, Variable speed wind turbine generator. Zond Energy Systems, General Electric Company, RICHES MCKENZIE & HERBERT, February 18, 1999: CA2300201

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator (620), a torque controller (623) and a proportional, integral derivative (PID) pitch controller (1010). The torque controller controls generator torqu ...


9
A S Mikhail, C L Christenson, K L Cousineau: Variable speed wind turbine generator. Zond Energy Systems, wang maohua, October 18, 2000: CN98809277

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...


10
Lipo Thomas A, Li Yue: Doubly-salient permanent-magnet machine. Zond Energy Systems, MALLIE Michael J, September 26, 1996: WO/1996/029774

A doubly-salient permanent-magnet machine includes an annular rotor (102) interposed between a pair of laterally disposed stators (100, 104). The rotor (102) includes a plurality of permanent magnets (106) alternating with electromagnetically-salient poles (108) made of steel. Each stator (100, 104) ...



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