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Why do transformers have air gaps?
In the case of a transformer or inductor, the air gap only reduces the slope of the B/H loop, reducing permeability and inductance, and hence increasing the magnetizing current in the primary. Thus, in the transformer example, the gap is used to reduce the inductance (perhaps for resonant applications).
Is an air gap faucet necessary?
Most plumbing codes require an air gap on the RO drain line to prevent the possibility of contamination. Since RO systems must dispense water through their own faucet, many opt for an air gap faucet that incorporates the air gap inside the body of the faucet itself.
Why do you need an air gap in a flyback transformer?
Now, flyback converters need an air gap since their unidirectional operation puts a DC component in the transformer’s primary current. But would it be advantageous to use an air gap in a high-power (say 24VDC out at 50 Amps) or very high power (340VDC out at 800 Amps for a high-power air ionizer) full-bridge converter’s output transformer?
Do you need air gap in power supply transformer?
An article I have read regarding switching power supplies ( https://sound-au.com/articles/smps-primer.html) says that push-pull, half-bridge, and full-bridge switching supplies don’t use an air gap in the transformer.
Why do you need an air gap in switch mode?
The air gap flattens the hysteresis curve and allows more energy handling by decreasing the permeability of the core. You will of course need to add more turns to get your desired inductance compared to no-gap, but you avoid core saturation.
Why does a forward topology transformer not need a gap?
A forward-topology transformer doesn’t need any gap since the peak flux density is a function of the applied volt-seconds only; the power being delivered ‘through’ the transformer isn’t a variable (other than its effect on duty cycle).