| ??? 09/06/08 20:31 Read: times |
#158016 - Blowing MOSFETs Responding to: ???'s previous message |
One thing to avoid blowing MOSFETs is never have 100% or 0% PWM duty cycles because at these extremes the bootstrap capacitors stop charging and the MOSFETs go boom! so make minimum PWM duty cycle about 10% and maximum about 90%.
Use a fuse on the DC-Link capacitor for safety. Also use soft start because at start up spikes tend to destroy MOSFETs. Mahmood |
| Topic | Author | Date |
| Drive IGBT using AT89C51 | 01/01/70 00:00 | |
| good luck | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| IGBT short circuit protection | 01/01/70 00:00 | |
| Timings | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| 3 phase output | 01/01/70 00:00 | |
| RE:SPWM | 01/01/70 00:00 | |
| get a device with CCU (capture compare unit) | 01/01/70 00:00 | |
| or with a PCA | 01/01/70 00:00 | |
| PCA 5% useful; CCU 95% useful | 01/01/70 00:00 | |
| IGBT driver | 01/01/70 00:00 | |
| IGBT | 01/01/70 00:00 | |
| HEXFET or IGBT | 01/01/70 00:00 | |
| Compare using software | 01/01/70 00:00 | |
| Compare using software | 01/01/70 00:00 | |
| code | 01/01/70 00:00 | |
| Blowing MOSFETs | 01/01/70 00:00 | |
| soft start design | 01/01/70 00:00 | |
Schematic | 01/01/70 00:00 |