	US 12,283,856 B2
	Coil for manufacturing a polyphase winding for an electrical machine
Ivan Petrovych Stadnyk, Kherson (UA); Vitalii Ruslanovych Harmash, Kherson (UA); and Artur Erastovych Borzakov, Kherson (UA)
Assigned to LIMITED COMPANY (LTD) SCIENTIFIC MANUFACTURING ENTERPRISE “OPTIMAG”, Kherson (UA)
Appl. No. 18/026,400
Filed by LIMITED COMPANY (LTD) SCIENTIFIC MANUFACTURING ENTERPRISE “OPTIMAG”, Kherson (UA)
PCT Filed Sep. 13, 2021, PCT No. PCT/UA2021/000078 § 371(c)(1), (2) Date Mar. 15, 2023, PCT Pub. No. WO2022/060343, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. a 2020 05940 (UA), filed on Sep. 16, 2020.
Prior Publication US 2023/0352998 A1, Nov. 2, 2023
Int. Cl. H02K 3/12 (2006.01)

CPC H02K 3/12 (2013.01) [H02K 2213/03 (2013.01)]

1 Claim

1. A coil for forming a polyphase winding of an electric machine, comprising: the coil being designed in a shape of an equilateral trapezium and manufactured using a self-baking wire, wherein active elements of the coil are straight, coil ends are positioned at right angle relative to the active coil elements and are bent arc-wise for rotating electric machines, or are straight for linear electric motors, and trapezium dimensions are determined depending on a width of the coil active element (h), a width of a magnet core tooth (h_t), a coil thickness (d), and an acute angle of the trapezium (α), where

d<2(h+h_t), h_t=0 for slotless winding design, and a distance between the active coil elements is 2h+3h_t.