摘要:
The invention describes a method of inspecting an air-gap (1) of an electrical machine (2), which method comprises the steps of directing at least one laser beam (L) into the air-gap (1); detecting the laser beam (L) after reflection; determining the distance (d OK , d F ) travelled by the laser beam (L); and analysing the travelled distance (d OK , d F ) to detect an irregularity (F pole , F oval , F object ) in the air-gap (1). The invention further describes an air-gap inspection apparatus (3) for detecting an irregularity in the air-gap (1) of an electrical machine (2), which apparatus (3) comprises a laser module (30) realised to direct at least one laser beam (L) into the air-gap (1) and to detect the laser beam (L) after reflection; a computation unit (31) realised to determine the distance (d OK , d F ) travelled by the laser beam (L); and an analysis unit (32) realised to analyse the travelled distance (d OK , d F ) to detect an irregularity in the air-gap (1).
摘要:
The present invention relates to a stator for an electrical machine comprising a stator body (101) which has a tubular profile with a ring shaped cross sectional shape. The stator body (101) is divided along a centre axis (109) of the stator body (101) at least into a first stator segment (113) and a second stator segment (114). The first stator segment (113) comprises a stator tooth (104) and a tooth tip cover (106), wherein the stator tooth (104) extents from a surface (201) of the first stator segment (113) along a radial direction (102) and has a free end (202). The tooth tip cover (106) is mounted to the free end (202) of the stator tooth (104) in a detachable manner.
摘要:
It is described a method (100) of estimating torque for a synchronous electromagnetic machine (101) comprising a stator having at least one winding and a rotor having a, during operation, magnetic region, the method comprising: receiving a current signal (i d , i q , 105, 107) indicative of an electrical current flowing in the winding; receiving a voltage signal (u d , u q , 103) indicative of a voltage applied to the winding; estimating a back electromotive force (e d , e q ) based on current (i d , i q ) and voltage (u d , uq) ; deriving a torque (Te) based on estimated back electromotive force (e d , e q ) and current signal (i d , i q ).
摘要:
Beschrieben ist ein Konvertersystem (101) zum Konvertieren von Wechselstrom (113,115,117,121,123,125) variabler Frequenz in Wechselstrom (129,131,133,135,137,139) konstanter Frequenz, wobei das Konvertersystem aufweist: einen ersten Konverter (119), welcher mit einem ersten Satz (109) von Windungen eines Generators (107) elektrisch verbindbar ist; und zumindest einen zweiten Konverter (127), welcher mit einem zweiten Satz (111) von Windungen des Generators (107) elektrisch verbindbar ist, wobei der erste Konverter in einem ersten Betriebsmodus ausgebildet ist, eine erste geschätzte Rotorposition (145) des Generators (107) zu bestimmen, und Ansteuerungen von in dem ersten Konverter umfassten ersten Leistungstransistoren (153) zum Konvertieren des Wechselstroms basierend auf der ersten geschätzten Rotorposition (145) vorzunehmen, wobei der zweite Konverter (127) in einem ersten Betriebsmodus ausgebildet ist, die erste geschätzte Rotorposition (145) des Generators (107) von dem ersten Konverter (119) zu empfangen, und Ansteuerungen von in dem zweiten Konverter (127) umfassten zweiten Leistungstransistoren (163) zum Konvertieren des Wechselstroms basierend auf der ersten geschätzten Rotorposition (145) vorzunehmen.
摘要:
There is described a rotor of an electric generator, preferably an outer rotor of a generator in a wind turbine. This rotor consists of a rotor structure comprising a ferromagnetic material (610,611,612) able to guide the magnetic flux, wherein at least one cavity (615) is formed in the ferromagnetic material (610,611,612) in such a manner that the magnetic flux in a direction substantially perpendicular to the pole body (611) is attenuated by the cavity (615), see stippled line 616.
摘要:
The invention describes a method of inspecting an air-gap (1) of an electrical machine (2), which method comprises the steps of directing at least one laser beam (L) into the air-gap (1); detecting the laser beam (L) after reflection; determining the distance (d OK , d F ) travelled by the laser beam (L); and analysing the travelled distance (d OK , d F ) to detect an irregularity (F pole , F oval , F object ) in the air-gap (1). The invention further describes an air-gap inspection apparatus (3) for detecting an irregularity in the air-gap (1) of an electrical machine (2), which apparatus (3) comprises a laser module (30) realised to direct at least one laser beam (L) into the air-gap (1) and to detect the laser beam (L) after reflection; a computation unit (31) realised to determine the distance (d OK , d F ) travelled by the laser beam (L); and an analysis unit (32) realised to analyse the travelled distance (d OK , d F ) to detect an irregularity in the air-gap (1).
摘要:
A rotor of an electric machine which might be used in a wind turbine is described. The rotor comprises (a) a mechanical support structure and (b) a magnet arrangement (560). The magnet arrangement comprises (b1) a first permanent magnet component (570a) and (b2) a second permanent magnet component (570b). The first (570a) and the second (570b) permanent magnet component are attached to said support and are arranged in axial direction of the rotor. The cross section in circumferential direction of the first permanent magnet component (570a) has a first shape and the cross section in circumferential direction of the second permanent magnet component (570b) has a second shape being different from the first shape.
摘要:
The present invention relates to a tubular body (100) for an electrical machine. The tubular body (100) comprises a curved surface area (101), a first tooth (110) and a second tooth (120). The tubular body (100) is arrangable with respect to a further tubular body (100) such that one of the tubular body (100) or the further tubular body (100) is rotatable with respect to the other one around a rotary axis (105). The first tooth (110) and the second tooth (120) extend from the curved surface area (101) along a radial direction (102) with respect to the rotary axis (105), wherein the first tooth (110) and the second tooth (120) are spaced apart from each other along a circumferential direction (103) around the rotary axis (105). The first tooth (110) comprises a first side wall (113) facing a second side wall (123) of the second tooth (120), wherein the first side wall (113) comprises a first section (111) which is parallel to the second side wall (123) such that a circumferential distance (104) between the first section (111) and the second side wall (123) is constant along the radial direction (102).