Question

What is the minimum frequency accepted for the spark gap converter, used in current production of high frequency induction furnace?

(a) 10,000 cycles/second

(b) 15,000 cycles/second

(c) 20,000 cycles/second

(d) 25,000 cycles/second

I got this question in my homework.

My enquiry is from Induction Furnace topic in chapter Metal Furnace and Practice of Casting-Forming-Welding II

Answer 1

Right answer is (c) 20,000 cycles/second

To elaborate: Spark gap converters which are equipped for the production of high frequency current can have a minimum frequency of 20,000 cycles every second, in high frequency induction furnace.