SU1201991A1 - Device for switching steps of multibridge thyristor converter - Google Patents

Abstract

A DEVICE FOR SWITCHING THE STAGES OF A MULTIHEAD THYRISTOR TRANSMITTER containing a driver controller, a synchronization unit whose input is intended for connecting to the secondary winding of a power transformer, a phase-shifting unit, one input of which is connected to the output of the synchronization unit, and the output connected to the first input of the transformer, and one output connected to the first input of the synchronization unit connections to the thyristor converter, about t - that, for the purpose of simplification of the device and improvement of energy indicators of works thyristor converter, it is equipped with an analog-to-digital converter, a decoder and a register, the first input of the analog-digital converter connected to the output of the driver controller, the second input to the output of the synchronization unit, and the output connected to the input of the decoder and information (About the register input, clock input which is connected to the output of the decoder, and the output is connected to another input of the phase-shifting unit and the second input of the distributor.

Description

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The invention relates to electrical engineering, in particular to converter technology: e, and can be applied to control multi-bridge inverter-inverter converters. Inventor, used mainly in the AC locomotive.

“. The aim of the invention is to simplify. (And the improvement of the energy performance of thyristor trans (azovatel.

On fig depicts a functional diagram of the device; figure 2 timing diagrams of signals on

circuit elements.

Device for switching stages of multi-bridge thyristor

 The converter contains the controller of the driver 1, the output connected to the first input of the analog-digital converter 2, the second input of which is connected to the code of the 3 syn. synchronization, the decoder 4, the input of which is connected to the output of the analog-digital converter 2, a. output to the register clock input

5, the information input of which is connected to the output of analog-digital converter 2, the phase shifting unit 6 is connected to the register 5 by the first input, the second input to the output of the synchronization unit 3, and the output to the first input of the distributor 7, the second input of which is connected to. the output of the register is 5, and the output is intended for connection to the thyristor-. Nomu converter 8 with traction motor 9 in the load circuit. .

The device works as follows.

At the output of driver controller 1, the analog signal changes from O to IQ B in 1 control zone, from 1.0 to 20 V in the C zone, from 20 to 30 V in the U1 zone, and from aO to 40 V in the I zone. The analog-to-digital converter 2 converts the analog signal c into a binary parallel code (for example, a 10-bit code), and its output information is updated according to the sync pulse of the synchronization unit 3.

Deshifrato.p 4, analyzing the change of the analog code of the 1; o-digital converter ..2 over the entire range, generates a permissive output

5 (single) signal of FIG. 2-) in a certain control range of each. For example, if there is a single and zero potential in bits 5 -8 (10-bit

About code) at the output of the decoder 4 there will be a zero potential. This means that the enabling signal at the output of the decoder 4. will be formed in the range

5 from 0.6 to 9.4 V in the X-th zone, from. 10.6 to 19.4 V in the | G zone, from 20, .6 to 2.9.4 V in the B-th zone and from 30.6 to 39.4 V in, C-i zon, t. e. from 10 to 170 el.grad. in each

0 zone regulation.

RA: the resolver of the decoder

The 4th clock input of the register 5 rewrites from its information input to the output the code of the analogous digital-to-digital converter 2. The diagram explaining the principle of forming the output code K of the register 5 is shown in FIG. .

The phase shifting block-6 performs the conversion of an 8-bit one. (I - 8 bits of the code, 1 (p) of the register code 5 to phase-impulse information synchronously with the network, for which

the input comes a clock pulse from 5 sync block 3 ..

Adjustable –PO phase pulse from the output of block 6 is fed to the input of the distributor 7, which is dependent on. Bridges from the zone number distributes the adjustable pulse to the corresponding thyristors of the converter 8 according to a predetermined algorithm. In this case, information about the zone enters the distributor 7 from the register

5 in the form of a 2-bit binary code (9 and 10 bits of the ltp code). meanings: 00 - J. zone, 01 -II. zone, 10 - W zone, M (figure 2.

The use of an 8-bit binary code proportional to the phase of the control angle ensures the discreteness of its quantization.

5 rvO, 7 el.grad.

Claims (1)

DEVICE FOR SWITCHING STEPS OF A MULTI-BRIDGE THYRISTOR CONVERTER, containing a driver's controller, a synchronization unit, the input of which is designed to connect to the secondary winding of a power transformer, a phase-shifting unit, one input of which is connected to the output of the synchronization unit, and the output is connected to the first input of the distributor, the output of which is intended for Connection to a thyristor converter, characterized in that, in order to simplify the device and improve the energy performance of the thyristor converter, it is equipped with an analog-to-digital converter, a decoder and a register, the first input of the analog-to-digital converter connected to the output of the driver’s controller, the second input to the output of the synchronization unit, and the output connected to the decoder input and the register information input, the clock input of which is connected with the output of the decoder, and the output is connected to another input of the phase-shifting unit and the second input of the distributor. (Put.1