1. test of the correct polarity of the control:
You want to ' get out, whether the high voltage cable jointing MOSFETs are controlled properly, take out the primary coil of the half bridge, provide them with 12V of normal voltage and power a small light bulb in series with the two MOSFETs. If the illuminated, while the circuit is running, the MOSFETs are controlled wrongly, then both at the same time. If not, ever ok, doesn't mean that it is.
2. test the AC generation
Turn a small transformer in the bridge Instead of the primary coil. 20 primary windings, secondarily. On the secondary side again the small light bulb. If the lights, then work the production of AC voltage, the transformer makes the light bulb glow. Does it work isn't an error somewhere, so that the bridge produces no AC. Probably the MOSFETs incorrectly by control. It also works with a full bridge.
Half-bridge you can go over also the test, because she can leave a performance only with existing AC voltage at all. A full-bridge can transport but also DC thus brauchts the transfer marker test.
3. checking the quality of the signal
Unlock any resistance (car halogen lamp or something) in the half-bridge as a consumer and slowly increase the voltage from 0V to until the lamp begins to glow. (Protective low voltage, no network!) At the same time, you befühlst the MOSFETs whether companions are warm. If not and the lamp lights up full steam ahead (the 100W or more) then alright, the MOSFETs work in pure switching operation. Those things are hot, so the signal quality of control is bad, the Moses operation run in the A and swinish generate losses. This is due mostly to the GDTs when running in the saturation or low permeability beitzen (air column!)
4. adjust the frequency
This also use only 12V bridge voltage noble and a car lamp in series to the half-bridge, thus the MOSFETs not at the frequency setting off smoke. When training without the TC output light - bad. Then the frequency at the TC adjust to maximum output power is reached.
Then, if everything works, can finish assembling the Konstruktuion & slowly increase the voltage at the bridge.
Well, so you can find out whether it is in principle. Whether the circuit then however survives a test on mains voltage - who knows...
