RU2349015C2 - Asynchronous machine - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and may be used in other engineering branches, for example wind-power engineering. The main point of the invention is the use of specific common rotor in asynchronous machine with two stators and common rotor. The above-mentioned common rotor rotates freely with regard to the shaft and at the same time has two separate short-circuited windings for each stator and one common short-circuited winding for both stators. One stator is fixed to the shaft, while the other rotates together with it. The windings of the fixed stator and the stator rotating together with shaft are made up from windings of two or more unequal sections of the above stators. In addition, the minor sector of the fixed stator winding and the minor winding sector of the stator rotating together with the shaft are connected to the mains. The same connection is ensured for large sectors or next by the size sections of the fixed stator or stator rotating together with stator shaft.

EFFECT: increase of electromagnetic moment at smaller dimensions, while ensuring moment control.

2 cl

Description

The invention relates to electrical engineering and can be applied in other industries, for example, wind energy.

A propeller drive is known, consisting of an asynchronous and synchronous machine, and although this device is completely different in electrical wiring, kinematics and purpose, but there are two stators and a common rotor with one common for two stators squirrel-cage winding, and a rotating stator. [one]

Known asynchronous machine with two stators and a common rotor with two short-circuited windings separate for each stator [2].

Known asynchronous machine with two stators and a common rotor with one common for two stators short-circuited winding, and one of the stators has the ability to rotate 180 el. degrees. [3] and [4] adopted as a prototype.

The disadvantage of these asynchronous machines are: the limited ability to obtain the greatest electromagnetic moment at the smallest dimensions, the lack of regulation of the electromagnetic moment and low efficiency at small and very small electromagnetic moments.

The problem to which this invention is directed is to increase the technical capabilities of obtaining the greatest electromagnetic moment at the smallest dimensions, the possibility of obtaining regulation of the electromagnetic moment and increase the efficiency at small and very small electromagnetic moments.

The technical result is achieved by the fact that in an asynchronous machine with two stators and a common rotor, the common rotor freely rotates relative to the shaft and simultaneously has two short-circuited windings separate for each stator and one short-circuited common for two stators, one of the stators is stationary on the shaft and rotates together with the shaft, and the windings of the fixed stator and the stator rotating together with the shaft are composed of windings of two (or more) unequal sectors of the above stators with jointly connected we take into the electric network the windings of the small sector of the stationary stator and the windings of the small sector rotating together with the stator shaft, the windings of large (or the next largest) sectors of the fixed stator and rotating together with the stator shaft have the same connection.

An asynchronous machine consists of a fixed stator with a winding consisting of a winding of a small sector and a winding of a large (or the rest) sector; rotating together with the stator shaft with a winding consisting of a winding of a small sector and a winding of a large (or other) sector; devices for joint inclusion in the electric network of windings of small sectors and devices for joint inclusion in the electric network of windings of large (or each of the remaining) sectors of the above stators; and a common rotor freely rotating relative to the shaft, and, at the same time, with two short-circuited windings separate for each stator, and with one short-circuited common for two stators.

The asynchronous machine operates in generator mode as follows. The stator rotating together with the shaft is driven into rotation, and they are included in the electric circuit of the winding of small sectors of the fixed stator and the stator rotating together with the shaft. At the same time, a small sector of the fixed stator and a small sector of the stator rotating together with the shaft are in operation. On this common rotor, with this switching on, there are basically two short-circuited windings separate for each stator; the influence of one common winding for two stators is the least. The energy for creating a magnetic field of an asynchronous machine is much less and corresponds to the sector share of the whole machine, which significantly increases the efficiency at small and very small electromagnetic moments. To increase the electromagnetic moment, instead of windings of small sectors, windings of large (or ascending) sectors are connected. To obtain the greatest electromagnetic torque, the windings of all sectors of the fixed stator and the stator rotating together with the shaft are connected together. On this common rotor, with this switching on, there is basically one short-circuited winding common for two stators, the influence of two short-circuited windings separate for each stator is the least.

Information sources

1. A.S. USSR No. 765943 Н02К 16/00, 1980. “Electric drive of coaxial mechanisms of counter rotation”.

2. K.I.Shenfer "Asynchronous machines", SEI, ML, 1938, Fig.226, Fig.228.

3. K.I. Schenfer "Asynchronous machines", SEI, ML, 1938, Fig. 177, p. 186 and Fig. 179 and Fig. 180, p. 187.

4. A.S. USSR No. 1453533, Н02К 16/00, 1989. “Asynchronous motor”.

Claims (2)

1. An asynchronous machine with two stators and a common rotor, characterized in that the common rotor rotates freely relative to the shaft and has at the same time two short-circuited windings separate for each stator and one short-circuited common for two stators, and one of the stators is stationary on the shaft and rotates with the shaft. 2. The asynchronous machine according to claim 1, characterized in that the windings of the fixed stator and the stator rotating together with the shaft are composed of windings of two (or more) unequal sectors of the above-mentioned stators with joint connection of a small sector of the fixed stator winding and a small winding to the electric network sectors rotating together with the stator shaft, the windings of large (or the next largest) sectors of the fixed stator and rotating together with the stator shaft have the same connection.