The slot constant calculation method considering the relationship between positions and contribution of slot segments

Author

Iwata, Kazutoshi

Author_Institution

Toshiba Corp., Yokohama, Japan

fYear

1991

fDate

Sept. 28 1991-Oct. 4 1991

Firstpage

8

Abstract

A slot constant calculation method of semi-enclosed slots in unsaturation ranges of cast rotor cores is described. It is shown that when dividing a shape segment, the contribution of the segment to the slot constant before a division is kept constant after the division about any shape segment. It is made clear that the upper segment has the larger contribution in design calculation, and the contribution depends on the combined weighing factor. This relationship is extended to the relationship between the contribution and the position of a shape segment in a slot. An appropriate calculation method in the lowest trapezoid segment is proposed. In this method, only the self slot constant is approximated. The relationship between positions of segments and the contribution is verified by testing machines of two segment slots and four segment slots.<>

Keywords

electric machines; rotors; cast rotor cores; self slot constant; semi-enclosed slots; slot constant calculation method; slot segments; trapezoid segment; unsaturation ranges; Aluminum; Circuit testing; Induction motors; Iron; Magnetic circuits; Magnetic cores; Magnetic flux; Rotors; Saturation magnetization; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1991., Conference Record of the 1991 IEEE

Conference_Location

Dearborn, MI, USA

Print_ISBN

0-7803-0453-5

Type

conf

DOI

10.1109/IAS.1991.178125

Filename

178125