CS206307B1

CS206307B1 - Magnetic circuit of the inching electromotor

Info

Publication number: CS206307B1
Application number: CS708879A
Authority: CS
Inventors: Jan Gahura
Original assignee: Jan Gahura
Priority date: 1979-10-19
Filing date: 1979-10-19
Publication date: 1981-06-30

Description

Vynález sa týká magnetického obvodu krokového elektromotora. Magnetický obvod krokového elektromotora má vytvořený příslušný počet zubov a drážok rovnoměrně rozložených po obvode statora a rotora. Prevádzkové vlastnosti krokového elektromotora sú v značnej miere ovplyvnené tvarom drážok a zubov, obzvlášť čo sa týká hodnot záběrového a menovitého točivého momentu,The invention relates to a magnetic circuit of a stepper motor. The magnetic circuit of the stepper motor has a corresponding number of teeth and grooves distributed uniformly over the circumference of the stator and rotor. The operating characteristics of the stepper motor are largely influenced by the shape of the grooves and teeth, in particular as regards the engagement and nominal torque values,

U súčasných riešení magnetického obvodu statora a rotora krokového motora sa používajú drážky typu U, buď s rovným alebo polkruhovým zakončením dna drážky. Pre výrobu takto tvarovaných drážok sú potřebné speciálně upravené střižné nástroje. Ich výroba, vzhl’adom na vysoké technologické požiadavky pri dodržiavaní maximálnej přesnosti rozmerov drážok je náročná, vyžaduje vysoké finančně náklady na materiál a technologicko-pracovný proces výroby střižného nástroj a pre kombinované geometrické tvary je časové zdlhavý.Current solutions of the magnetic circuit of the stator and the stepper motor use U-type grooves with either a straight or semi-circular groove bottom end. Specially adapted shearing tools are required to produce such grooves. Their production, due to the high technological requirements while maintaining the maximum accuracy of the groove dimensions, is demanding, requiring high financial costs for the material and technological-working process of the production of the shearing tool and time-consuming for combined geometric shapes.

Vyššie uvedené nedostatky sú u magnetického obvodu krokového motora odstránenéThe above-mentioned drawbacks are eliminated in the magnetic circuit of the stepper motor

Claims

SUBJECT

A magnetic circuit of a stepper motor, characterized in that it has circular grooves (3, 4) of radius (R), wherein the radial grooves of the magnetic circuit are formed by only one geometric shape so as to represent part of the circle where it generally applies, that the radial distance of the center of the groove circle from the air gap is determined by the relation d = (0.1 - 0.8) R, where d is the radial distance of the center of the groove circle from the air gap and

R is the radius of the groove circle.

An example of a magnetic circuit design of a stepper motor according to the invention is shown in FIG. 1, which shows the design of the grooves on the stator and rotor in the deployed shape. The magnetic circuit of the stepper motor consists of the magnetic circuit of the stator 1 with the circular grooves 3 and the magnetic circuit of the rotor 2 with the circular grooves 4. The radial distance of the center of the grooves R.

the distance of the center of the groove circle from the air gap is given by d = (0,1-0,8) R,

206 3 07 where d is the radial distance of the center of the groove circle from the air gap a

R is the radius of the groove circle.

Magnetic circuit according to claim 1, characterized in that the annular grooves (3) are transferred to the stator (1).

Magnetic circuit according to claim 1, characterized in that the annular grooves (4) are transferred to the rotor (2).

Magnetic circuit according to claim 1, characterized in that the circular grooves (3, 4) are transferred to the stator (1) and the rotor (2).