SU692064A1 - Arrangement for controlling a multipulse rectifier circuit - Google Patents

Description

It is consistent with the stability of the operation of the system of management and, well, multiply, rectifier.

The aim of the invention is to improve the quality of the jh: la bénée control and increase the stability of the device.

To do this, in order to control the multi-pulse rectifier, the outputs of these blocks are pulse-phase controlled and connected to the key inputs according to the ring connection scheme so that the outputs of the blocks of the pulse phase-phase control of the even ground drivers are connected to the keys of the previous odd groups of drivers , and the outputs of the pulse-frequency control blocks of the odd-numbered groups of the frkshreatiateley are connected to the inputs of the keys of the preceding even groups of drivers, and the outputs of the shapers are even and kechotyy Trupp ssyutbotstvonno connected to n: ydam subsequent nechetnrs and chetnth syloyOrs shooting istorv rectifier,

FIG. Figure 1 shows a device for controlling a multi-pulse rectifier in a circuit diagram, in particular, in a private circuit of a multi-pulse rectifier. FIG. 2 presents diagrams. bye with the principle of his work.

The system consists of optocoupler pairs 1-18, impulses 19-36 controls, blocks 3 7-42 impulsive phase control, keys (transistor) 43-48, limiting resistors 49-. 54, capacitors 55-72 of the formers, resistors 73-90 of the formers, synchronization transformer iD 1, Channels 92-97 of the control unit of the rectifier, ai ,, about amp 5 windings,

The scheme works as follows.

Consider the operation of the circuit from the moment the optocoupler 1 is turned on. Up to this point, all the optocouplers 1-18 are closed, the capacitors 55-72 are discharged, the keys 4348 are locked.

From the moment the optocoupler pair 1 comes into operation, the capacitor 55 begins to charge through the resistor 49. The charge current pulse from 49 arrives at the input of the pulse-phase-phase unit 37) and regulates the start of its operation with the opto-polar diode 1 (Fig. 2.1 ). The impulse from the output of block 37 enters the key 48 of channel 97. Last, Unlocked, shunts the capacitors of the drivers of the channel 97 pulses. Since the latter did not have time to charge at E1OT, there would be no control pulses at the output of the formers.

At the end of the work of the optocoupler pair 1 through 20 el.grad. The optocoupler pair 2 of channel 93 enters into operation. The charging current of the capacitor 56 through the resistor 50 is fed to the input of the impulse-phase control unit 38 (see Fig. 2: |) and synchronizes the start of its operation. From the output of the block 38, a pulse arrives at the input of the switch 43, which discharges the capacitor 55, which was previously charged, through the resistor 73, and forms the control impingement 20.

Upon completion of the operation of the optocoupler pair, 2 the optocoupler pair of channel 94 will begin operation.

The charging current of the capacitor 57 through the resistor 51 is fed to the input of the pulse-phase control unit 39 (see Fig. 2 |) and synchronizes the start of its operation. From the output 39, a pulse arrives at the input of the switch 44 of the channel 93, which discharges the previously charged capacitor 56 through a resistor 74 and generates a control pulse 21.

Through the next 20 email. hail, the optocoupler pair 4 of channel B5 will start to work, and from the output of the 40 pulse-phase control unit the pulse will go to the input of the key 45 and the output of the driver 94 will form a control pulse 22.

Similarly, optocouplers 5 and 6 synchronize the pulsed-phase control blocks 4 and 42, from the outputs of which the pulses arrive at the keys 46 and 47, which in turn form impulses 23 and 24 of the control, respectively.

Upon completion of the operation of the optocoupler pair 6, i.e. after 120 electr., from the moment the optocoupler 1 enters into operation, they begin to enter into the vessel in accordance with the order of their switching on the optocoupler pairs 7, 8, 9, 10, 11, 12, and the operation of the circuit is repeated by the difference that In the process of forming the control pulses, capacitors and resistors connected with the specified optocoupler pairs are involved. Similarly, the scheme works through the next 12O email. degrees, when optocouplers 13, 14,15, 16, 17 and 18 come into operation.

Thus, during a period, each cam operates with a tripled frequency of the mains voltage. The shift of control between the channels contributes 2O el. Grades, and in each channel 120 el, hail, (see Fig. 2), i.e. for the period, the system generates in 6 channels 18 by them, control pulses with a shift of 20 e. degrees

It is obvious that the connection of the outputs of the pulsed-phase control units with the key inputs according to the ring circuit eliminates the main drawback of two-channel devices for controlling the possibility of recharging the forming capacitors at small control angles and thereby increases the stability of the system.

This is clearly seen from the diagrams (Fig. 2), whence it follows that the formation of control pulses (i.e., the discharge of the capacitors of the formers) occurs after the end of the work of the corresponding optocoupler pair.

This control system works in exactly the same way, if its synchronization occurs not in the inter-switching periods, but in the cPr zero of the network.

Claims (3)

1. Sitnik N. X. Silov Semiconductor Technology, M., Energie, 1968, p. 198, fig. 4.27. 2. Pisarev A. L., Detkin L. P., Managing thyristor converters, M., Energie, 1975, p. 68 3. Forward number 2173087 / 2-4-07, cl. H 02 R 13/16, 1975, which received a positive decision on the issuance of the author's certificate. uJt (rig.g.