Timeline for H bridge not switching correctly - Induction heater
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 18, 2018 at 6:32 | vote | accept | Junkers | ||
| Jan 16, 2018 at 19:28 | answer | added | metacollin | timeline score: 3 | |
| Jan 16, 2018 at 17:38 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Dec 17, 2017 at 11:50 | history | tweeted | twitter.com/StackElectronix/status/942361323798777856 | ||
| Dec 17, 2017 at 9:52 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Sep 25, 2017 at 4:11 | comment | added | Junkers | @next-hack The MOSFETs are IRFP260ns | |
| Sep 25, 2017 at 4:11 | comment | added | Junkers | @Marla The tank frequency is approximately 15.34KHz. I've noticed the effect of what you are pointing out. If the frequency is too low, ringing occurs during a positive going transition. I find this tends to happen as the graphite crucible heats up and the net inductance decreases. I typically have to increase the frequency to keep the circuit stable. | |
| Sep 24, 2017 at 15:20 | answer | added | analogsystemsrf | timeline score: 0 | |
| Sep 24, 2017 at 15:07 | comment | added | Marla | The FET diode will experience reverse recovery losses. Extra heating in the transistor package when operating below resonance | |
| Sep 24, 2017 at 15:00 | comment | added | analogsystemsrf | @ Marla What are the energy-management issues, such that Foperate must be above Fresonate? | |
| Sep 24, 2017 at 14:37 | comment | added | Marla | What is the frequency of your tank circuit (parallel I see). Operating frequency needs to be above resonant frequency of the tank circuit at all times. | |
| Sep 24, 2017 at 14:36 | comment | added | next-hack | Which MOSFET did you use for Q1-4 ? | |
| Sep 24, 2017 at 14:33 | comment | added | Junkers | My implementation of this circuit doesn't include R3-4 and R7-8. I didn't really see the point of them and they didn't make any practical impact during simulation. | |
| Sep 24, 2017 at 14:31 | comment | added | Transistor | @Junkers: SE does limit the number of images in a post until the user has some rep. I've embedded them for you and given you some rep. | |
| Sep 24, 2017 at 14:30 | history | edited | Transistor | CC BY-SA 3.0 |
added 220 characters in body
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| Sep 24, 2017 at 14:25 | comment | added | next-hack | What are the resistor R3-4 and R7-8 for? IR2110 outputs are not meant for resistive loads... | |
| Sep 24, 2017 at 14:19 | history | asked | Junkers | CC BY-SA 3.0 |