US 12,135,207 B2
Inspection device for rotating electrical machines and method for inspecting rotating electrical machines
Norihiko Hana, Tokyo (JP); Masao Akiyoshi, Tokyo (JP); Daichi Goto, Tokyo (JP); and Kazuaki Ogura, Tokyo (JP)
Assigned to MITSUBISHI GENERATOR CO., LTD., Kobe (JP)
Appl. No. 17/637,463
Filed by Mitsubishi Generator Co., Ltd., Hyogo (JP)
PCT Filed Dec. 19, 2019, PCT No. PCT/JP2019/049829
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/124515, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2022/0276045 A1, Sep. 1, 2022
Int. Cl. G01B 21/32 (2006.01); H02K 3/487 (2006.01)
CPC G01B 21/32 (2013.01) [H02K 3/487 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inspection device for inspecting a rotating electrical machine including a stator having a wedge for fixing a winding, either with a spring interposed between the wedge and the winding, or by having a spring function, the winding being placed in a slot formed on an inner side in a radial direction of an annular core of the stator, and a rotor provided on an inner side in the radial direction of the stator with a predetermined interval therebetween, the inspection device comprising:
a receiver configured to input shape data indicating a shape of an inspection target surface of the wedge exposed from the slot in a state in which no force is applied to the wedge;
a processor and memory configured as a relation storage which acquires and stores, as a deformation reaction force relation, a relation between a reaction force of the spring or the wedge at the inspection target surface of the wedge and deformation distribution from the shape of the inspection target surface of the wedge inputted to the receiver;
the processor and memory further configured to measure measurement deformation distribution of the inspection target surface of the wedge;
the processor and memory further configured to estimate an estimation reaction force from the measurement deformation distribution and the deformation reaction force relation; and
the processor and memory further configured to judge whether a looseness of the wedge is either proper or indicates a fault on the basis of the estimation reaction force.