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Hi
Do you have enough dead time in your drive signals a and a' ?
Its also possible that gate sources being self charged somehow so adding a parallel damping resistor would probably solve it .
Btw : why you didnt use a float driver instead ? For instance ir 2113 or ir2110 or ... ?
Hi
Whats that circuit ? If you wanna drive a mosfet with pulse or pwm or sth , there are lots of good options available for instance ics like ir21xx series or perhaps transformer drivers or maybe totem pole circuit or ....
Why that circuit ?
Hi
What you have done , is a way that everybody will use to see ripple voltage and noise , separately .
Technically consider that mode , equivalent to a series capacitor with signal . Ac will go through and dc will block .
Best wishes
Hi
As i know , you can go through LT (Linear technology productions ) chips . I used many led drivers and current controller chips from that company .
However it would be nice if you could at least give us more specifications . Isn't it ?
Best wishes
Re: 5 volt to drive 300 watt heater
Hi Klaus
OMG ! i thought he/she is mentioning 300 mw but now i saw it is in watts !!!
in this matter relays or contactors will do the job !
More information is required .
Re: 5 volt to drive 300 watt heater
Hi
Use a current driver and then drive it . because MCU can't handle this current .
For current driver , darlington pair or perhaps a mosfet would be fine .
Best Wishes
Goldsmith
Hi
after reading the books which other fellas suggested , it would be nice to have a look over here too :
https://www.edaboard.com/showthread.php?t=229615&highlight=inductor+design+methodology
Good luck
Goldsmith
Hi
You mean simulating by capture cis ? did you draw a schematic ? perhaps it would be good , to see your schematic and edit simulation menu ?
Best Wishes
Goldsmith
Hi
So he has to check it if the SPWM is correctly generated .
Yes that is simple . why you think measuring an small level DC is that hard ?
About Digital oscilloscopes , i guess everybody has a good digital oscilloscope these days , of course everybody who wants to work with inverters and...
You are absolutely right
Single supply but we are talking about full bridge which can provide a pure AC signal if the control signal (SPWM ) is designed well .
In this matter , i was meaning across the resistive load we can simple measure it .
And as i know every usual digital oscilloscope...
Hi
about capacitors that was an example . i wanted to tell you you most consider equivalent circuit of a real capacitor (not an ideal one ) . then you'll face with several issues e.g ESR or ESL or leakage . you must try to reduce em . how ? several different ways are available . one of them is...
Hi
where this DC should come from ? switches only would be either on or off . they are not working in linear region hence DC signal won't be applied but of course if message signal
(sine wave ) is dealing with DC offset then it can happen but i seriously don't think he summed his sine wave via...
Hi jano2358
using different kind of capacitors in parallel together is a regular method . for instance film capacitors and electrolytic capacitors .
All the matter is , decreasing ESL and ESR . as a suggestion , try to read about Y2X2 capacitors .
Best Wishes
Goldsmith
Hi KlausST
I presume he means comparing a triangle wave with a sine wave however i didn't saw it in his schematic too .
if with resistive load it works fine then the problem is either out put impedance and resonant frequency of LC filter with motor or motor type ( universal or squirrel cage...
hi
that is not surprising .
you have put an LC filter in order to take the sine signal from SPWM . that looks fine but did you ever think every filter deals with an impedance ? out put impedance i mean !
when you put your motor , it can change impedance of that filter and short circuit or...
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