SU915176A1 - Thyratron ac motor with power sensor-transformer - Google Patents

Description

The invention relates to electrical engineering, in particular to electric machines of alternating current with contactless switching of windings - valve electric motors.

Known valve AC motors with a power sensor-transformer, located with axial shift. There are DC poles on the motor stator, and the rotor winding sections are connected to thyristors [ΐ] ·

The disadvantage of this engine is its considerable mass and dimensions and low energy indices.

Also known is an alternating current valve electric motor with a power sensor-transformer containing a stator, in the grooves of the magnetic circuit of which the windings of the DC poles are located and the alternating current windings shifted by a fixed angle, and the rotor on which is located

The sections of the rotor winding are closed to the valves ^].

Its main drawback is low energy indicators, due to the inconsistency of the form of the current form of electromotive force.

The purpose of the invention is to increase the energy performance of the engine.

This goal is achieved by the fact that the DC and AC windings of the stator are distributed, their conductors are located in the same grooves, and the groove area occupied by the conductors of the DC windings 82. and AC windings 5 ^ within half of the pole division obeys the exponential the law of distribution _and | M

where η is the slot number from the beginning of the pole

divisions;

N is the number of grooves on the pole division

5 is a constant value.

W 915176

FIG. 1 shows the electrical circuit of the stator windings, 'in figure 2. arrangement of sections of DC and AC windings; on fig.Z ~ distribution of conductors of windings in ₅ slots.

In the slots 1-8 of the stator on the pole division 'C is located a single-phase winding 9 of alternating current and a winding 10 of direct current. ten

the shape of the current is determined by the shape of the emf induced in the conductors by the currents of the direct and alternating current poles, which, in turn, depend on the spatial arrangement and their windings.

It is necessary that the difference between the transformer electromotive force in the rotor winding and the counter electromotive force of rotation in the same winding 1θρ (Χ) from the pole field of the direct current voltage is a monotonically decreasing function of the X coordinate at any speed within the pole division from X - £ to · = Ζ / 2. (figure 1). On the other half of the polar division from Χ-ΌίΤ. to X = T> - 6, this difference should monotonously increase, where 6 is the part of the interpolar space on which the second sides of the DC winding ₃₀ are placed.

These conditions are met if II C ³⁶ ·)! '

V ^x '

where ~ distribution function

the maximum value of the transformer EMF in the rotor rods along the active pole arc at an ideal idle;

the distribution function of the EMF of rotation in the rotor conductors along the pole arc at the same speed.

The second condition that determines the manufacturability of the design is the placement of the windings of alternating and direct current within the active pole arc in the same grooves, i.e.

3, + 3 _g = 5

where Zu is the groove area occupied by the alternating current winding;

5 ^ is the area of the groove occupied by the winding ⁵⁵ koi DC;

3 - groove area occupied by both windings.

35

40

45

50

^four

These conditions can be reduced to a system of equations whose solution are the expressions

\ ίΣω

. 3 _A * ze'—

Where

ν ₀

the angular frequency of the AC mains voltage, the rotor circumferential speed at ideal idle.

The expressions for 3 and 5 ₂ can be transformed taking into account the fact that the value of the relation \ ₀ 122и> is a dummy pole division. With the selected tooth pitch on the stator, a dummy number of slots Ν equal to

R

Ν = -r—

The ratio X / · ^ side, the number of the groove p, located at a distance X from the edge of the pole division.

Then 5 ^ = 51

32 = 3 (1-15) In this case, the current form in the rotor bars will provide high energy performance.

Claims (1)

Claim Valve AC motor with a power transformer sensor, containing a stator, in the magnet duct of which the windings of the DC poles are located and the windings of the alternating current are shifted by a fixed angle, and the rotor, on which the rotor winding sections are closed, closed on the valves, that, in order to increase the energy performance. the windings of the direct and alternating current of the stator are made distributed, their conductors are located in the same grooves, and the groove area occupied by the conductors windings of direct current 3 ^ and windings of alternating current 3 ₄ , within half a pole division, obey the exponential distribution law 5, = 5% · = SQ ⁴ - ^, five 915176 where η is the slot number from the beginning of the pole condition *, N is the number of grooves on the pole division g 5 is a constant value.