SU424284A1 - SERIAL INVERTER - Google Patents

Description

Lime and sequential inverters, consisting of several cells, operating in the Ireryvist.ch mode of currents and containing two bridges on the thyristors, one of which is connected to the extreme terminals of the capacitive divider connected to a power source, the midpoint of which is one of the output clamps, and the like clips of the alternating current of the bridges are connected in pairs to one of the plates of the switching capacitors, the other plates of which are connected into a star and connected to another of the output terminals.

The proposed inverter can extend the range of smoothly controlled output voltage. This is achieved in that the DC terminals of the other bridge are connected to the intermediate points of the capacitive delntel.

FIG. 1 given the power circuit described by the inverter; in fig. 2 - functional control circuit of the inverter; in fig. 3 is a diagram of the inverter current; FIG. 4 is an inverter voltage chart.

The inverter contains a main thyristor bridge / -6, an additional bridge on thyristors 7-72, capacitive blocks 13-16 of the divider, comilex resistance 17, 18 of the load and commuting capacitance 19-21.

The inverter control circuit consists of a geerator 22 and independent imulses yHpaii.io 1 of the phase shifter 23.

Thyristors 7-12 of the additional bridge are turned on from generator 22 in a sequence corresponding to their designated. Thyristors 1-6 of the main bridge are controlled in the same sequence by pulses coming from the phase shift, its devices 23 with delay. .

At the time of time: the control unit / i from the generator 22 is supplied with a controlling 1 pulse to the thyristor 7. The current flows through the circuit: capacitive unit 14 - thyristor 7 - capacitance /.9 - complex resistance / 5, 17 - capacitive unit 14, and to terminals 24 -Opplied voltage EI.

When the delay expires at time t, the output of the phase shifter 23 is given a control pulse to the thyristor 1. As a result, the thyristor 7 is turned off under voltage, the current switches from the thyristor 7 to the thyristor / and flows through the circuit: - clamp 24 - capacitance 9 capacitive unit 14 - - a capacitance Hbiii block / .. A clamp is applied to the terminals of the inverter .j.

By changing the delay of the phase-shifting device 23, it is possible to smoothly adjust the nap; the female at the output of the inverto 1a from the wide range 30, to the value of,.

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Consistent; inverter,

, H) several cells work;

3 mode interrupted. X currents and contain, 1; i two bridges on

ОДКи ОЧЕН to thyristors, i-us of which are “parasites to the de,

ps CONNECTED TO SOURCE 1 OM, the point of which is one 3 OUTPUT () 1x MOB. and one; mepn) 1e): e; current - bridges iioiiap io iodk; Very much to one plate of communist terminals of capacitors, the other plates of which are connected in a star are connected to another of the output terminals, characterized in that, in order to penetrate the range of the continuous regulation of the output voltage, the terminals of the other bridge are connected to the intermediate points of the capacitive 1tel.

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