Discharge phenomenon in vacuum induction melting furnace

Discharge phenomenon in vacuum induction melting furnace

So shall we talk about, it measures have? Decline in the power supply voltage, increasing turn distance; Choose reasonable furnace coil connection methods are can be reached by effect of electric field strength. However, because of the limitation of by the coil structure, often cannot increase turns distance. Therefore, combined method of coil to become crucial in the planning of induction furnace.
(1) small vacuum furnace induction melting furnace usually choose single induction coil, (can supply voltage) between two terminal voltage of the biggest, interturn voltage is very low. And essential way to prevent this kind of induction furnace discharge is a decline in the power supply voltage, with increased according to the specific conditions of turns distance from (usually turn distance in 5 ~ 10 mm, not too much or it will cause a decrease in the electrical power). In the process of planning practice, most small vacuum induction furnace power use 250 v voltage, will not cause in the process of producing discharge of [3].
(2) large and medium-sized vacuum induction melting furnace sometimes needs to choose the method to connect two or more coils - series (figure 2) (a) or parallel (as shown in figure 2 (b)). Two conditions interturn electric field intensity can present different situation, analysis is as follows.
(a) for the two induction coil in series, in a flash the polarity as shown. Two coil into the electrical terminals (A +), the electrical terminals (B -) adjacent, assume that the supply voltage RMS V. According to the principle of electrotechnics, the two adjacent terminals (A +, B -) between the voltage amplitude was flat, in the opposite direction. For a maximum of 2 V. Maximum instantaneous field strength for/air gap.
(b) for the two induction coil in parallel, in a flash the polarity as shown. Two coil into the electrical terminals (A +), (B +) adjacent, assume that the supply voltage RMS V. According to the principle of electrotechnics, the two adjacent terminals (A + B +) between the voltage amplitude was flat, direction. For a maximum of 0. The maximum instantaneous field intensity is zero. The above analysis of vacuum induction melting furnace discharge phenomenon.