SU113448A2 - Contactless system of synchronous transmission of the angle of rotation and rotation of the axis on alternating current - Google Patents

Description

BASIC Auth. St. No. 106194 described a contactless system of synchronous transmission of the angle of rotation and rotation of an axis on a direct current, which contains a rotation angle sensor, a receiver and two contactless phase-sensitive amplifiers.

The proposed system is more perfect, as it reduces the number of connecting wires to three, which increases the reliability of the system.

This is achieved by the fact that the sensor and receiver have three-phase windings, and the fact that three phase-sensitive rectifying-amplifying devices are used in the system, the control windings of which are connected in a star with a neutral wire, and the output windings are connected in a star with an insulated neutral

The drawing shows a schematic diagram of the proposed system.

The device consists of a rotation angle sensor and a receiver. A non-contact sine-cosine three-phase rotary transformer (with an output winding 2 connected to a star with a neutral wire) is used as a sensor. The receiver serves as a contactless three-phase synchronous maschina 3.

The stator winding of the receiver is powered from the winding 2 of the sensor through three contactless phase-sensitive rectifying-amplifying devices 4. The excitation windings 5 of these devices are connected to the network 6 of the reference voltage, the control windings 7 are connected to a star with a neutral wire and connected to the stator windings of the sensor, and the output windings S are connected in a star with an insulated neutral and are connected to the stator windings of the receiver.

The proposed synchronous transmission operates as follows.

When the driver axis 9 is rotated, i.e., the rotor / O of the sensor at an angle and variable voltages on the three phases of its output winding 2 will vary according to the law f / sin H; f / sin (6-120 °) and C / sin (W + 120 °).

Phase sensitive devices 4 convert these variable voltages into amplified constant voltages, proportional respectively to: sin e; sin (Y - 120 °) and sin (in + 120 °). Therefore, the currents flowing through the three-phase winding of the stator of the receiver 3 will create a constant magnetic flux rotated in space by an angle. Rotation of the receiver’s magnetic flux will cause its rotor to rotate, and therefore also the executive axis 11, at the same angle (:).

Subject invention

A contactless system of synchronous transmission of the angle of rotation and rotation of the axis at a constant current according to the author. St. No. 106194, from the fact that, in order to reduce the number of connecting wires to three, the sensor and receiver have three-phase windings, the control windings of the three phase-sensitive rectifying-amplifying devices are connected to a star with a neutral wire, and the output their windings are connected in a star with an isolated neutral.