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You may use STGW20NC60VD.
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Same reason... need to not saturate in transient regim.
If that would happen may lead to destructive demage (present as a shot-circuit for upstream eq.) or at least blown of fuse... if is too fast.
Ok, I see now...
Ringing is about 3.5MHz, L2 with Coss Q2 || parasitic capacitance of switching node. No resistance in circuit so very small dammping factor.
May try to add a 100ohm/3W resistor parallel with L2.
Problem is ringing of motor inductance on turn-off buck higher MOS (when lower MOS is on) because circuit is not dummped... fastest test, add a resistor 100-150ohm parallel with motor.
Do you added diode and cap parallel with motor?
Fastest response mean to remain in analog zone.
High current may be detected by looking at derivative... need fast circuits.
May use few high speed comparators and an precision timer(s) to looking at derivative and if is about a short-circuit, this must send turn-off signal as fast possible.
Add a 10k resistor between gate - soruce of each MOS.
Add few 0.1micro ceramic caps on pin Vin of controller.
Try to start at lower frequency (200-250kHz) and low load and if no oscillation, increase freq and check at what freq start again.
What kind of motor use? Brushed? With a resistive load...
I agree regardind 0% and 100% values for a "switching" converter... these values are extreme cases for turn-off and turn-on for long time.
Regarding chopper duty cycle, that is in fact a buck converter, with range between DCmin to DC max, that can be 4-5% to 95-96%, which mean translated in...
This "If the noise has a radiant component will be more complicated " refer to situation when noise is send by electromagnetic waves (radio).
As you have long distance between driver and MOSFETs, these lines may acts as an antenna transmmiting and noise is "radiant" as radio waves that induce...
Sorry, but may add more details at your question? What you looking for in fact / what is main concern?
In any switching converter there are a minimum turn-on and turn-off time... can't have 0.0000001% or 99.9999999% duty cycle because IGBT/MOSFET need some time to turn-on or off in a safety mode...
100% duty cycle mean IGBT is turned on for long time... can't speak about a switching converter anymore.
Many application limit duty cycle to 95-96% because need some time for turn-off... so can't go above this limit, but can have "100%", aka IGBT turn-on for long time.
If can't use a totally separate 3.3V controller power supply (my recomandation) add LC filters on pins 3 and 9 of IR2110.
Also, may be high dv/dt, so try to increase R1 to 22ohm and add a 10ohm resistor series with D1 to slowdown turn-on/turn-off. Check if switching loss increase too much.
If...
Simple 3 diodes, one on each phase will assure power and redundancy for up 2 lost phases.
After these add caps/ filter and a flyback topology power supply. For such small power and increased redundancy may have 2 such diodes blocks and 2 power supplies, togheter connected by diodes.
Need to see Bmax difference, that is area difference of cores.
If have same material, will be same loss curve.
First core (bigger) have effective area A1 and volume V1, second core: A2 and V2.
A1=ka*A2; ka=A1/A2 and V1=kv*V2, kv=V1/V2
Flux density: B1=fi/A1 and B2=fi/A2; ratio B1/B2=A2/A1=1/ka...
I made same calculation and best values for f0=100kHz are: Lp=6micro, Lr=0.8micro, Cr=3.4micro; n=0.012 (about 1:84 or 2: 168).
Fmin (to keep ZVS) = 84kHz; Fmax=115kHz
Most of resonant converters are frequency modulated (controlled) not by PWM.
ZVS is a mode of switching that depend of load, frequency and converter switch capacity (Coss), can't be controlled by a PWM.
From resonant converters, most used seem to be LLC; depending of your application may be or...
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