A medium frequency furnace will check

by:Hengyang Furnace     2020-10-21
Would a medium frequency furnace check technology principle and maintenance of an intermediate frequency furnace will check? A: a medium frequency furnace of medium frequency power supply working principle is: the three-phase bridge type all control the ac rectifier for dc rectifier circuit, after the flat wave reactor, became a constant dc current source, then through single phase inverter bridge, the dc current inverter with a certain frequency ( Generally between 1000 and 8000 hz) The single-phase medium frequency current. Load is composed of induction coil and compensating capacitor, connection. Intermediate frequency furnace without intermediate frequency voltage is going on a: there is no intermediate frequency voltage is typical of inverter is not successful, sometimes sound despite the current, dc ammeter also have show, but there is no intermediate frequency voltage, electric current as long as a little bigger will over-current protection. So you should check the inverter part emphatically: 1 check whether there is any breakdown on inverter silicon, in 5-1 k file test Between 10 k. 2 check whether there is any breakdown on electricity distressful, general and simple method with 1. 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. Who know how to judge it pulse of intermediate frequency furnace is a: whether pulse rectifier ( On the control panel of six small pulse transformer) , or the inverter pulse ( Installed in other places, according to each intermediate frequency furnace manufacturers use different pulse pulse transformer, a single transformer, there are also two transformer in a small circuit board, there are four transformer on a circuit board) 。 But the edge of each transformer has a red. How to detect the fault in medium frequency furnace in a medium frequency furnace will check, please answer: 1 intermediate frequency furnace repair phase rectifier: problem characterized by abnormal noise when working, maximum rose less than output voltage rating, and strange sound bigger power ark, then to lower output voltage is controlled in 200 v, oscilloscope for investigation of the rectifier output voltage waveform ( Oscilloscope should be placed in power synchronization) , when the normal input voltage waveform each cycle were six waveform, lack of. Intermediate frequency electric furnace flow is the reason why a: 1, the reason: medium frequency furnace condenser soft breakdown. This phenomenon is commonly voltage suddenly flow to a certain value. Measures: with each wave table capacitor, or a capacitance of a drop, until find out bad capacitor. 2, reason: rectifier, inverter silicon soft breakdown or intermediate frequency furnace heat dissipation is not good. Measures: SCR soft breakdown when the multimeter to measure, only the boot. I always burn inverter unit 2 tons of intermediate frequency furnace tube, is not the same for each of the burning, answer: is over-current burn or overvoltage? Now can try in the several direction: 1 check panel inverter pulse is given; 2 thyristor signal before end should be a inverter pulse transformer, to see if it is have a problem; 3 finishing line, may be there is interference cause triggered by mistake; 4 thyristor installation should pay attention to the size of the installation force when appropriate, too big. Intermediate frequency furnace up not to cause a medium frequency furnace will check, please answer: 1, the SCR burned 2, 3 cable is broken, capacitor broken 4, there is something wrong with the furnace body 5, there is something wrong with the line voltage. What is the principle of intermediate frequency electric furnace? A: intermediate frequency electric furnace is a kind of smelting equipment, not household electric furnace! - - - - - - Through the electromagnetic induction eddy current in the metal surface melt metal heating equipment, consists of furnace body, bus before furnace busbar, frequency conversion device, water cooling device, control of five parts. Features: 1, the melting speed, metal components uniform, 2, low temperature around the stove, smoke less, make it. 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. A medium frequency furnace will check it the foundry enterprises with technical data of intermediate frequency furnace will there be a one-size-fits-all answer: should not Mr. I guess the reason of the temperature is equal to do the heat treatment, become a soft iron. Intermediate frequency furnace will have leakage phenomenon? A: star if after the intermediate frequency furnace transformer, if leakage is more easily hurt, if not grounded, the leakage of the voltage to ground for real voltage, you should pay attention to safety. Wear shoes bottom thick insulation is better, this will reduce the feeling of hemp electricity.
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