The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2021
Filed:
Jul. 31, 2017
Hitachi Industrial Products, Ltd., Tokyo, JP;
Kazuo Nishihama, Tokyo, JP;
Masanori Sawahata, Tokyo, JP;
Takayuki Koyama, Tokyo, JP;
Makoto Imura, Tokyo, JP;
Yuuichirou Yoshitake, Tokyo, JP;
Kenichi Sugimoto, Tokyo, JP;
Kengo Ueda, Tokyo, JP;
Hitachi Industrial Products, Ltd., Tokyo, JP;
Abstract
There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as μ, a relationship of ws>μ×I×Tr/0.6 is met.