SU752646A1 - Electric alternating-current generator - Google Patents

Description

The invention relates to electric machines and can be used to produce alternating current under conditions that do not allow the use of rubbing electrical contacts.

Synchronous generators with combined excitation are known, having an anchor winding and an excitation winding on the stator, and permanent magnets magnetized radially or ₁₀ tangentially (along the chord) and magnetic shunts on the rotor. The excitation winding is made circular and connected to the anchor winding through a regulator containing a rectifier [1}

The disadvantage of generators with combined _JS excitation is the complexity of the excitatory link, low speed, the presence of a transformer-rectifier unit, and an increased axial size. 20

The closest one to the proposed alternating current electric generator, containing on the stator a multiphase anchor winding and an excitory link with a multiphase distributed excitatory winding connected to the anchor winding in phases through the regulator, and on the rotor are permanent magnets and soft magnetic elements. As the latter, end magnetic soft shunts are used that are not magnetically connected with magnetized radially permanent magnets [2].

The disadvantage of the generator is the cumbersomeness of the excitatory Even and the reduced speed of voltage regulation due to the presence of a massive magnetic · circuit and autonomous shunts in the delivery link.

The purpose of the invention is to simplify the excitatory link and increase the speed of voltage regulation of the electric non-contact generator .. This goal is achieved by heme, that in an electric alternator containing a multiphase armature winding and a exciter link with a multiphase excitatory

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winding connected in phase to the anchor winding through the regulator, and on the rotor permanent magnets and magnetically soft elements, a flat sub-reinforcing winding on the stator adjoins through the air gap at least one of the ends of the rotor with tangentially magnetized permanent magnets, between which there are magnetically soft: sector poles moreover, as a regulator connecting phase-by-stage anchors and excitatory winding using a static phase regulator.

Figure 1 schematically shows a generator, a longitudinal section; in Fig.2 - 15 the same, cross section ;, in Fig. 3 electric circuit of inclusion of windings.

The stator of the generator contains a multiphase anchor winding 1, a lined core 2 anchors, a flat multiphase 20 excitatory winding 3, laid on the end lined core 4, a non-magnetic bracket 5, a side shield 6 and a housing 7. The number of phases and poles of the excitatory and anchor windings is 25 Cov. These windings are connected in phase through a static phase regulator (SFR), which is used, for example, a zero type phase regulator, which has high values of efficiency and 30 power factor, as well as high speed.

Magnetically tangentially permanent magnets 8, magnetically soft sector poles 9, 35 non-magnetic inserts 10, non-magnetic ring 11, shaft 12 are located on the rotor of the generator and the end of the rotor (or both ends) pushes through the constructive ¹ gap to the excitatory winding.

The excitatory winding is connected 40 directly to the anchor winding and secured to the rotary washer.

When the generator winding podvozbuditelnaya _sozdaet additional magnetic, flux η _s p rotating with the n: th speed as the rotor. The stream φ _{n is} closed through sector poles 9 and the anchor. With a change in the phase of the current in the sub-excitatory winding, the phase changes, and therefore the total magnetic flux _; excitation ranging from f - f _p to. , where ф _о flux, ¹ created by permanent magnets.

In this way, the output voltage of the generator is regulated.

Claims (2)

The invention relates to electrically driven machines and can be used to obtain alternating current under conditions that do not allow the use of rubbing electrical contacts. Synchronous generators with combined excitation are known, having on the stator the main winding and sub-excitation winding, and on the rotor constant agnity, n: magnetically radially or tangentially (along the chord), magnetic shunts. The excitation winding is ring-shaped and connected to the core winding through a regulator containing a multiple of the cores. A disadvantage of generators with combined excitation is the difficulty of supplying evens, low speed, the presence of a transformer-forming block, and an increased axial size. Most of the bizok to the proposed electric alternating current generator contains on the stator a multiphase main winding and an extra-excitatory link with a multi-phase distributed subexciting winding connected to the core (embotka phase by phase through the regulator, and on the rotor - permanent magnets and magnetically soft elements. As the last Magnetic end shunts are used that are not magnetically connected with magnetized radially permanent magnets 2. The generator has the disadvantage of being awkwardly connected and lower speed voltage regulation, due to the presence of a massive magnetic circuit and autonomous shunts in the excitatory link. The purpose of the invention is to simplify the secondary link and increase the speed of voltage regulation of an electrical contactless device. a bundle containing on the stator a multi-focal core winding and a motor link with a multi-phase substimulsive 37 winding connected to the main winding via a pofeno The regulator, and on the rotor permanent magnets and magnetically flexible elements, is flat along the auxiliary winding on the stator adjacent to: air gap at least to; one of the end faces of the rotor tangentially. magnetized permanent magnets, between which there are magnet sector poles, moreover, as a guideline tqpa, connecting the pfaano core and an excitatory winding, using a static phase regulator. In Fig.1 schematically shows a generator, a longitudinal section; FIG. 2 is the same cross section; FIG. 3 electrical circuit for winding. The generator stator contains a multi-phase core winding 1, laminated core 2 core, a flat multi-phase subsuppetitive winding 3, laid on the front laminated core 4, a non-magnetic bracket 5, a side shield 6 and the housing 7. The number of phases and poles at the subsurface and root windings are the same. These windings are connected in phase through a static phase regulator (SFR), for example, a zero-type phase regulator with high efficiency and power factor, as well as high speed. On the rotor of the generator there are magnetized tangentially permanent magnets 8, magnetically soft sector poles no magnetic inserts 10, non-magnetic ring 11, shaft 12. The rotor butt end (or both ends of the rotor connects to the subsurface winding through the constructive gap, the exciter winding connects directly to the core winding and fastened to the swivel washer. 6 When the generator is operating, the pre-excitable winding creates an additional magnetic flux iF rotating at the same speed as the rotor. Poles 9 and measles. When the current phase changes in the subelectric winding, the phase and, consequently, the total magnetic flux changes; the excitation ranges from f - f to o p ... where the photomasses generated by the permanent magnets. generator output voltage. Formula of the invention. An electric alternator containing a multiphase main winding and an extra-excitatory link with a multiphase sub-excitation winding connected phase to the main winding through the regulator and on the rotor on the stator Permanent magnets and magnetically flexible elements, distinguished by the fact that, in order to simplify the pre-excitation unit and increase the control speed, it is also possible to wind the stator on the stator through at least one of the rotor ends with tangentially magnetized permanent magnets, between which are magnetically soft; sector poles, moreover, a static phase regulator was used as a transducer connecting the phase winding of the core and the substimulus winding phase by phase. The source of information taken into account in the examination 1. Work of MEI, vol. 258, 1975, p. 23. 2. US Pat. No. 325076, cl. 32249, 1965.