SU1527689A1 - Thyratron electric motor - Google Patents

Abstract

The invention relates to electrical engineering, in particular to contactless valve motors with built-in angular position sensors. The aim of the invention is to simplify the design of the valve motor and increase the steepness of the output signal of its angle position sensor. The valve motor comprises a rotor 2 with 2 P poles, a stator 1 with an M-phase core winding, a measuring winding 10 of an angular position sensor, each phase of which consists of two semi-phases 4 and 5 connected in series with a high-frequency alternating voltage source. with midpoint half bridge layout. The motor is equipped with a toroidal bias winding consisting of series and coils 10 interconnected among themselves, wound on the stator back through its slots, and the measuring winding half-phases are wound through holes made in the stator back, each half-phase being located relative to each other with an offset an angle multiple to pole division, and the axis of each semi-phase of the measuring winding of the sensor coincides with the axis of the coil group of the corresponding phase of the core winding. To make better use of the backrest of the stator, the holes for the semi-phases of the measuring winding of the sensor are located on the axis of the teeth of the stator, and the bias winding coils are located between the semi-phases of the measuring winding. Each semi-phase of the measuring winding may consist of one coil, made in steps equal to one tooth division of the stator, and grooves may be made for the bias coils on the outside of the stator. The bias winding is connected to a DC source. 2 hp f-ly, 2 ill.

Description

but the other is offset by an angle multiple to the pole division, and the axis of each semi-phase of the measuring winding of the sensor coincides with the axis of the coil group of the corresponding phase of the core winding. To make better use of the backrest of the stator, the holes for the semi-phases of the measuring winding of the sensor are located on the axis of the teeth of the stator, and the bias winding coils are located between the semi-phases of the measuring winding. Each semi-phase of the measuring winding may consist of one coil, made in steps equal to one tooth division of the stator, and for k, displacements from the outside of the stator can be made grooves. The bias winding is connected to a direct current source. 2 hp f-ly, 2 ill.

The invention relates to electrical engineering, in particular, to contactless valve motors.

The purpose of the invention is to simplify the design of the motor and increase the steepness of the output signal of its angle position sensor.

FIG. 1 shows a valve motor with an integrated angle position sensor, a general view; in fig. 2 is a diagram of the connection of the measuring windings of the position sensor.

Valve motor with

The integrated angular position sensor contains a stator 1 with twenty ie-grooves, a rotor 2 with 2p poles, a three-phase core winding 3 located in the slots of the stator 1, a three-phase measuring winding of an angular position sensor, each phase of which, for example, phase A, consists of wound through holes in the back of the stator 1 and semi-phases 4 and 5 connected in series between themselves, whose axis of symmetry coincides with the axis of symmetry of the coil groups of phase A of the core winding 3. Similarly to semi-phases 6 and 7, phases B are symmetrically located relative to The coil groups of phase B of the core winding 3 are united, and the semi-phases 8 and 9 are symmetrically relative to the phase C of the core winding, the toroidal displacement winding of the angle position sensor, consisting of coils 10 wound on the stator back through its grooves, and according to each other. The measuring winding of the position sensor (Fig. 1) consists of diametrically located semi-phases, however, when the electric motor is made multi-polar, these semi-phases

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five

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35

. ..

50

can be offset from each other by an angle multiple to pole division.

The bias coils 10 in FIG. 1 is placed in every second slot of the stator, however, this is not necessary. For example, for a more uniform filling of the stator slots, the number of coils can be taken equal to the number of slots and, on the contrary, if there are no high requirements for uniformity of filling of the slots, then it is enough to place one gauge 10 between the semi-phases of the sensor measuring windings, especially since it takes relatively small part of the volume of the groove.

The semi-phases of the measuring winding of the position sensor, as shown in FIG. 1, are made in steps equal to the tooth division of the stator, and the holes for these semi-phases are located on the teeth axis only for better utilization of the stator’s backrest volume, so if there are no high requirements for the stator utilization ratio, then the winding pitch for the semi-phases can be accepted t and not equal to the tooth division of the stator.

The measuring windings of the angular position sensor are connected via a three-phase half-bridge circuit, where V is the high-frequency AC source voltage, which through a transformer with a midpoint O on the secondary winding is applied to the half-phases 4-9 of the sensor winding. Each of the three phases of the measuring winding consists of successively interconnected half-phases and is connected to the secondary winding of the transformer. The output signals of the dph phases of the sensor are the voltages between points A, B, C and the midpoint O on the secondary winding of the transformer.

Valve motor with integrated angle position sensor operates as follows.

A bias winding consisting of twelve coils 10 is connected to the DC source, and a closed ring magnetic flux (its direction is shown in Fig. 1 by arrows) is created in the back of the stator 1, which is summed with the pole current of the rotor 2. Since the magnetic flux from the bipolar rotor 2 is also closed along the back of the stator 1, then in the upper part of the back of the stator (fig. The rotor flow is summed with the annular displacement flow, and at the bottom it is subtracted,

The high frequency AC source with a voltage Ug connects the primary winding of the transformer (Fig. 2) and between the middle point O of the secondary winding of the transformer and the output, for example, of phase A, a voltage occurs that is proportional to the difference in induction between diametrically located back stator sections in which the semi-phases 4 and 5 of phase A are located. When the rotor 2 rotates, the output signal in the phases of the measuring winding of the sensor varies sinusoidally with a period equal to one revolution the rotor 2. When the rotor position shown in FIG. 1, the signal in phase A has a maximum value, since the diametrically located portions of the back of the stator, in which the holes of semi-phases 4 and 5 are located, have the maximum difference in the induction values. Phases B and C work similarly, shifted relative to phase A, respectively, by 120 and 240 electrical degrees. The output signals of phases A, 3 and C of the angular position sensor are fed to the control circuits of the keys connected by an output to the terminals of the core winding 3, as well as in the known electric motor, through the phase-sensitive rectifier circuit.

Since the angular position sensor is located on the magnetic core of the electric motor, the magnetic flux of the core winding affects the amplitude and phase of its output signal. However, as shown by tests of the layout of such an electric motor, this effect to the nominal values of the current in the core winding is insignificant and

96

No effect on engine performance.

The valve motor can also be made with a distributed winding of each semi-phase of the sensor measuring winding consisting of several coils made in increments greater than one perforation of the stator and arranged in the corresponding holes, the number of which can be, for example, equal to the number of stator teeth.

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five

g

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five

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five

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five

Claims (3)

1. A centrifugal motor with an integrated angular position sensor, containing a rotor with 2p poles, a stator with a ha-phase core winding, a t-phase measuring winding of the angular position sensor, each phase of which contains two semi-phases connected in series with the source high-frequency voltage with a midpoint half-bridge circuit, characterized in that, in order to simplify the design and increase the steepness of the output signal of the angle position sensor, it is equipped with a toroidal winding displacements containing, in series and according to interconnected coils, wound on the stator's back through its slots, openings are made in the back in the same circle, the half-phases of the measuring winding are wound through the openings, the half-phases of each phase are spaced from each other and shifted by an angle multiple of the pole division, and the axis of each semi-phase measuring sensor winding coincides with the axis of the coil group of the corresponding phase of the core winding. 2. An electric motor according to claim 1, which is characterized by the fact that, in order to better utilize the stator back volume, the holes for the semi-phases of the measuring winding of the sensor are located on the axis of the teeth of the stator, and the bias coils are located between the half-phases of the measuring winding. 3. Electric motor on PP. 1 and 2, characterized in that each measuring winding half-phase consists of one coil, made in steps equal to one tooth division of the stator, on the outer side of which the outer sides of the back surface are grooved, in the offset windings. "6 8 O / f 3 C fas. 2