High-voltage soft-starting, voltage-stabilizing and voltage-regulating device of compensating transformer

Abstract

The invention relates to a high-voltage soft-starting, voltage-stabilizing and voltage-regulating device of a compensating transformer, comprising a tapped transformer and a high-voltage compensating transformer, wherein a secondary electrode of the high-voltage compensating transformer is connected in a high-voltage line in series; the high-voltage line is connected with a high-voltage motor; the tapped transformer comprises 2K taps, wherein K taps are respectively connected with an input end of a primary electrode of the high-voltage compensating transformer, by a second bidirectional silicon-controlled thyristor, and the other K taps are respectively connected with an output end of the primary electrode of the high-voltage compensating transformer by a first bidirectional silicon-controlled thyristor; K is an positive integer greater or equal to 2; and the input voltage of the tapped transformer is 220V. The high-voltage soft-starting, voltage-stabilizing and voltage-regulating device of the compensating transformer is used for replacing the existing high-voltage starting device, realizes high-voltage soft starting of the high-power high-voltage motor and has no harmonic pollution.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a high-voltage soft start, voltage stabilizing and voltage regulating device for a compensation transformer. Background technique [0002] Existing high-power high-voltage motors usually use the following two methods to limit current during startup. [0003] 1. Use a reactor to start a high-power high-voltage motor, usually starting at 65% of the power supply, and the reactor generally starts at 3500V (when the high voltage of the power supply is 10kV), but the reactor cannot adjust the voltage during the entire starting process. [0004] 2. The electronic high-voltage soft starter starts. Because electronic components operate under high voltage, the reliability of electronic components is poor, and the cost is high, so the reliability and cost of electronic components are not satisfactory. Moreover, the electronic high-voltage soft starter's chopper is used to obtain the star...

AI Technical Summary

Problems solved by technology

Because electronic components operate under high voltage, the reliability of electronic components is poor, and the cost is high, so the reliability and cost of electronic components are not satisfactory

Moreover, the electronic high-voltage soft starter's chopper is used to obtain the starting voltage, which also causes harmonic pollution to the power supply.

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