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Why does the intermediate frequency transformer always burn out?

Author : hongteng Time : 2020-12-08

Fault phenomenon: The intermediate frequency transformer burns out. After replacement, the equipment is restarted and the intermediate frequency transformer is still burnt out.

Fault analysis and treatment: This kind of fault is common in equipment with booster load, mainly caused by virtual connection and open circuit of discharge inductance. In a boost load, The voltages across the series capacitor bank and the parallel capacitor bank cannot be absolutely consistent, As that two set of compensating capacitor discharge, As that terminal voltage are inconsistent, The length of discharge time is also different, The discharge time is slow when the voltage is high, And this set of capacitors started the charging process before the full discharge was completed, Direct current charges will accumulate on this capacitor bank. These direct current charges will be released through the discharge inductance. If the discharge inductance is open, the accumulated direct current charges on the capacitor will be released through the intermediate frequency transformer. As the capacity of the intermediate frequency transformer is very small, it cannot withstand such large current flow, causing the intermediate frequency transformer to burn out.

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