SU1695456A2 - Non-contact synchronous generator - Google Patents

Abstract

The invention relates to electrical machines, namely, machines with magnetic switching. The aim of the invention is to increase the efficiency by improving the quality of the generated generator voltage. The contactless synchronous generator consists of a rotor 1, consisting of a light non-magnetic material with laminated magnetically conducting packages 2 pressed into it and separating them of the jumpers 3 of a non-magnetic material with high electrical conductivity. The stator 4 contains the main excitation winding 5 and the additional excitation winding 6 connected in series, as well as the main winding 7 core and the additional winding 8 core interconnected in series i-counter. 4 il.,

Description

FIG L

The invention relates to electric machines, can be used to generate electricity and is an improvement of the invention according to the author. St. No. 1361682.

The aim of the invention is to increase the efficiency by improving the quality of the generated generator voltage.

FIG. Figure 1 shows the sweep of the generator core at four different positions (1-4) of the rotor; in fig. 2 shows a diagram of the dependence of the flux linkage of the windings of the core with the magnetic fluxes of both excitation windings ,5, Fz with the total flux of excitation windings Φ on the rotor position; in fig. 3 is a diagram of variation of the flux linkage derivative.

dVte. dt

(EMF) in the windings of the core at idle

generator running; FIG. 4 shows the construction of the generator with p 2 (p is the number of pole pairs).

The contactless synchronous generator contains a rotor 1 consisting of a light non-magnetic material with laminated magnetically conducting packages 2 pressed into it and bridges 3 separating them bridges of non-magnetic material with high conductivity, stator 4, main excitation winding 5, additional excitation winding b, orthogonal to the excitation winding 5, the main winding 7 of the core and the additional winding 8 of the core made circular.

Contactless synchronous generator operates as follows.

When current flows through the windings 5 and 6 of the excitation at the position f (Figs. 1 and 2), only the flow of the excitation winding 5 - Fy (continuous line) participates in the induction of EMF in the windings 7 and 8 cor. When the rotor is rotated by one tooth division of the stator

(90 electrical degrees) in the windings 7 and 8, the core EMF is induced only by the flow of the winding 6 of the excitation - & 5 (dotted line), equal in magnitude and opposite in

to a flow of 3% (Fig. 1 - 3 position-e @.

Thus, the magnetic fluxes created by both excitation windings 5 and 6 have mutual spatial and

time shifts (Fig. 2). The total magnetic flux penetrating the coil of the core, F + Fb when the rotor 1 rotates, as well as the shape of the EMF of the core windings 7 and 8 (the change in the flux coupling derivative d) is shown in FIG. 3. The frequency of the EMF is f p p / 60, where p is the number of rotor revolutions per minute.

The EMF form is a periodic alternating function, close to a rectangular, with a duty ratio of 2/3. In this case, the effective value of the first harmonic emf is 0.955.

The content of higher harmonics in the function of the output emf of the proposed generator is significantly reduced.

Claims (1)

Claims of the invention Contactless synchronous generator according to the author. St. Ms 1361682, different so that, in order to increase efficiency by improving the quality of the generator voltage, it is provided with an additional field winding and core winding, each of the additional windings is made identical to the corresponding main one and is located orthogonal to it, the main and additional core windings are interconnected in series oppositely, the main and additional field windings are sequentially. Fig 2 L dt Fia.Z F cut