| ??? 08/25/08 17:28 Modified: 08/25/08 17:29 Read: times |
#157746 - another interesting waveform Responding to: ???'s previous message |
I just realised that the distorted waveform may not be random afterall. When I zoomed out and set my scope to 5ms, I noted
something interesting. (see waveform) (normal) And this happens only after dc bus voltage is 95V. Actually, for this one, I tried with 1uF instead of 20uF for bootstrap-capacitor. I am waiting for hi speed optos. (I have been told to use optos for isolation). I will get to you guys after I get more interesting results. This thing is getting interesting. |
| Topic | Author | Date |
| 3-phase Inverter IGBT phase waveform | 01/01/70 00:00 | |
| you are going to burn the motor | 01/01/70 00:00 | |
| Its a sine PWM | 01/01/70 00:00 | |
| ...or the IGBTs! | 01/01/70 00:00 | |
| i had same problem on a Hitachi 48kw inverter | 01/01/70 00:00 | |
| Gate Drive | 01/01/70 00:00 | |
| The driver cktry and the waveforms | 01/01/70 00:00 | |
| Bootstrap capacitors problems | 01/01/70 00:00 | |
| Some hints | 01/01/70 00:00 | |
| another interesting waveform | 01/01/70 00:00 | |
| No, no.... | 01/01/70 00:00 | |
Voltage rating of bootstrap capacitor | 01/01/70 00:00 |