SU67772A1 - Next drive - Google Patents

Description

One of the significant problems in the development of a modern automated electric drive is the development of high-speed follow-up drive systems, designed to carry out with high accuracy the movement of working bodies of various automatically controlled installations. The known circuits and installations are mainly developed in relation to the control of the servo system by a DC motor, which has the greatest flexibility in control.

It is also known to use a high-speed follow-up drive based on the use of ion-electronic equipment, replacing electromagnetic contactors and providing inertial control of the follower motor. Such circuits with direct current motors have a number of disadvantages (low engine efficiency, circuit complexity, difficulty in applying effective braking, etc.). The above circumstances have allowed up to now to use the following circuits with ion devices for low-power motors (for servo-drive purposes).

In the proposed design of a servo drive with an asynchronous motor, the secondary windings of serial transformers are closed through ion devices controlled from a servo system such as a system with servo semicircles. Two thyratrons are included in each winding in order to ensure the closure of the winding during the entire period of alternating current. The grid currents of thyratrons (microamps) are controlled by the following system. As the latter, you can use both contact and contactless system.

The drawing shows a device with a tracking system with a koi. tact half rings.

The following system consists of two stages, one of which is used for the coarse and the other for the precise setting of the angle. The coarse system G has two contact semirings a and 6 and a slider O which performs the angle setting with low accuracy. Vernier follow the BC system has two contact semirings A and B, PV counter-inclination level and sliding slider O. Vernier system is intended for precision No. 67772

processing of the angle and engine braking countercurrent to a complete stop .

The coarse and vernier systems are interconnected by a gear, the gear ratio of which is I-1.

The device also uses: a relay of the direction of rotation PHB, having two switching contacts and one contact; electromagnetic relays 1, 2, 3, 4 (type KDR), of which relay 5 is slow, and mechanical differential C, which is connected by the satellites engine O of the vernier tracking system of the aircraft, with the actuator AND and the angle sensor - selsyn D. If If the follower drive can be controlled remotely, it is rational to connect the engine of the vernier system with the control panel via selsyn D. The control of the thyratron is conducted on alternating current. Locking voltages on the grids are supplied from the grid transformers TR-3 and TR-4.

When setting up a vernier follow-up system of a working angle smaller than the angle at which the coarse system slider becomes on the contact half ring (see dotted line), the voltage is applied to the grid transformer TP-4. In this case, the TI thyratrons, controlled through the windings I, 2 of this transformer, go out, but the other pair of TZ tyratrons burns, because the transformer TR-3 is de-energized, and the engine comes into rotation, starting to work out the angle it sets. The rotational direction relay relay switches its contacts, which entails the activation of relay 3, which closes its normally open contact 3, through which a counter-switching stage is connected to the contact half-frame A, which controls the transformer TP-3. The motor, after working at the angle specified to it, begins to turn the actuating mechanism I, which is connected with satellite C. As a result, the BC engine of the vernier system begins to return to its original position. At the very end of the test, the slider hits the opposing arc, which through the normally open contact of relay 3 and the PHV relay contact is connected to the arc A, which controls the TR-3 grid transformer. This latter receives a voltage, as a result of which the TZ thyratrons, controlled by the transformer TR-3, go out and immediately the T-1 thyratrons are ignited, as a result of the switching off of the transformer TR-4. The engine goes into opposition mode and brakes quickly. Slow down to O, the engine does not stop, but reversed; in this case, as soon as it turns by 30 ° in the opposite direction, the relay of the direction of rotation is activated (throws its contact). Transformer TP-4 again receives voltage (across the circuit: servo system, backwire PV, normally closed RVB relay contact, resistance r, bow B, normally closed relay 2 contact and the thyratrons controlled by it go out. Transformer TR-3 remains under voltage (on the circuit: the servo system slider, the PV counter arrest, the relay contact 3, since the latter is slow and does not immediately release, the resistance r is the normally closed contact of relay 1) and the thyratrons controlled by it are extinguished. ogascheny, the engine does not work - given his corner to work.

The closure of the direct current circuit (the vernier follower engine, the anti-switching handle, relay contact 3, contact of the PHV relay, relay 4) triggers relay 4, which blocks itself through its normally open contact and bypasses it with the contact of the PHV relay. After this, relay 3 releases and the circuit comes to its initial position (relay 4 is kept in self-blocking). Relay 4 must otpu, Vernier,

install as soon as the engine of the vernier system is salted from the opposite pole on the contact half ring. However, for this relay the circuit / is maintained (-f-dc current, vernier engine, contact half ring, resistance r, normally closed contact of relay 3, backwash, contact of relay 4, relay 4}. In order to still relay 4 released, it is necessary that the current / in it was less than the release current. For this task, and introduced resistance g, which limits the current through the relay 4.

Subject matter

Claims (2)

1. The next drive with an asynchronous motor controlled by a contactless reversing controller, characterized in that a circuit with a tilting transformer and two series-type transformers, the secondary windings of which are closed through ion devices controlled from the next, are used as the specified controller. a system like a system with following semirings. 2. The form of the drive according to claim 1, characterized in that, in order to decelerate the motor with anti-switching, a relay of rotation of the PNE is used, equipped with two switch contacts and one contact of the circuit and serves to control the electrical damper-relay, which switches together with The contacts for switching the direction-of-rotation relays are intended for transferring (via the counter contact and the reverse half ring of the tracking system or directly connected to the grid transformer) bodies in opposition to its stop mode, relay lockable rotation direction emoy secured in an electromagnetic relay. - 3 - # 67772