Intermediate frequency furnace after start-up dc voltage is very high

by:Hengyang Furnace     2020-10-08
Intermediate frequency furnace start dc high voltage technology after an intermediate frequency furnace start after start-up problem of intermediate frequency furnace high dc voltage a. ever check the circuit connected to the intermediate frequency voltage where go to, the trip because you set of over-voltage protection problem, specific you can consult of 'divine radiation electric furnace' search related problem, look have the right solution, if it is not clear, can be directly consulting 'divine radiation electric furnace' engineer. 。 Intermediate frequency furnace full furnace on not only the direct current no straight answer: intermediate frequency voltage KK pipe damage, intermediate frequency electric capacitance breakdown will appear this kind of situation. Failure 1 failure phenomenon: intermediate frequency furnace large dc current when starting, low voltage dc voltage and frequency and over-current protection device and start the deep voice. Analysis: there is a bridge inverter bridge arm of the thyristor may cause short circuit or open circuit inverter bridge running three arm bridge. Oscilloscope were observed four bridge inverter bridge thyristor (tube voltage waveform on the arm of the if there is a bridge. Medium frequency power supply output power how to return a responsibility after the start a: medium frequency power supply failure equipment parts processing equipment working properly it will only be in good condition, power, equipment parameters adjustment improper influence power of equipment, power couldn't get on the main reasons are: 1, not adjusted the rectifier part, rectifier dc voltage is not up to conducting rating not completely affect power output; 2 improper adjustment to make, closure pressure values. Medium frequency furnace has dc voltage no intermediate frequency voltage is what reason? Intermediate frequency furnace starts high dc voltage answer: failure analysis and treatment: the failure phenomenon does not belong to the intermediate frequency power supply failure, but because of the load impedance is too low to cause, should readjust to load impedance. 1) In the circuit of pressure load, due to the damage to dismantle series compensation capacitor, not replace, or blindly pursue high power and increase compensation capacitor unchecked, load compensation amount. Consult ace, I take a medium frequency furnace. Phenomenon on dc as follows a: suggest to check the power first potentiometer, replacement of a look, if still or phenomenon, that is the other aspects. Series inverter circuits and parallel inverter circuit, for the circuit of the connection mode is different, the same failure phenomenon lookup aspect is different also. If it is a parallel inverter circuit, suggest you Jane after numerous search, first look at the furnace charge is added. What are the common faults intermediate frequency furnace? A: common fault analysis and processing method of intermediate frequency furnace: first: fault phenomenon: equipment cannot be started, started only dc ammeter have instructions, dc voltage no instructions, intermediate frequency voltage. Analysis: a has short pulse trigger inverter phenomenon; B thyristor inverter breakdown; C capacitor breakdown; D load has a short circuit, grounding phenomenon; E intermediate frequency signal. After the medium frequency furnace melting materials, why down a: intermediate frequency voltage, dc voltage is constant power furnace, furnace charge after the Curie point the melting temperature, hysteresis effect disappeared, temperature resistance increases, the eddy current reduced, induction coil, and the mutual inductance are also decreases, and the total impedance load increases, the dc current must be reduced, that's right. But if constant power furnace, intermediate frequency voltage should not be reduced, because have the effect of the main resistance regulator. Intermediate frequency furnace not connected induction coil boot with direct current, dc voltage no answer: hello, conditions, electricity (1 Circuit, power supply will generate electricity often) 2, have free movement of charged particles. ( Circuit, also need to be closed circuit. ) A standard scale. Medium frequency furnace has dc voltage no intermediate frequency voltage is what reason? Intermediate frequency furnace starts high dc voltage answer: failure analysis and treatment: the failure phenomenon does not belong to the intermediate frequency power supply failure, but because of the load impedance is too low to cause, should readjust to load impedance. 1) In the circuit of pressure load, due to the damage to dismantle series compensation capacitor, not replace, or blindly pursue high power and increase compensation capacitor unchecked, load compensation amount. Intermediate frequency furnace after start-up dc voltage high technical information medium frequency furnace dc voltmeter shaking dc ammeter can't be started shaking medium frequency furnace starts high dc voltage answer: check the high-voltage silicon stack. No-load normal medium frequency furnace, after add load is normal, however, starts to cut the intermediate frequency furnace high dc voltage answer: is a thyristor medium frequency furnace? Check the intermediate frequency voltage and the ratio of dc voltage, normal should be more than 12, 15 of the following, if the ratio is low, shall by high frequency, make ratio increases, otherwise easy to inverter, appear over-current protection. If the ratio is normal, the dc voltmeter pointer if there is a slight swing, if you have to check if there is a pipe three-phase rectifier fully-controlled bridge circuit.
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