| ??? 07/02/05 10:59 Modified: 07/02/05 11:04 Read: times |
#96436 - high frequency Responding to: ???'s previous message |
hi kai,
thanks for your valuable reply,i think it is high frequency instability,as my ciruit is running on 40khz driving igbt at this high frequency, it is feedback circuit causing a problem,the application is induction heating machine,in which primary currnet of transformer is kept constant through pwm of pulse running at 40khz.when i remove feedback coil(C.T.) from primary of transformer and feed the voltage through potentiometer circuit works fine,lm324 is used to detect under volatge threshold. thanks kuldeep |
| Topic | Author | Date |
| is it ground bounce | 01/01/70 00:00 | |
| No, hum or high frequency instability | 01/01/70 00:00 | |
| high frequency | 01/01/70 00:00 | |
| plastic enclosure | 01/01/70 00:00 | |
| Spray nickel | 01/01/70 00:00 | |
| nice idea | 01/01/70 00:00 | |
| cost vs working | 01/01/70 00:00 | |
| Then use internal shielding | 01/01/70 00:00 | |
| internal shielding | 01/01/70 00:00 | |
| Schematic, plan of whole setup? | 01/01/70 00:00 | |
| hi kai | 01/01/70 00:00 | |
| So where is the problem? | 01/01/70 00:00 | |
Then, good luck... | 01/01/70 00:00 | |
| Nickel paint | 01/01/70 00:00 | |
| Ground bounce | 01/01/70 00:00 | |
| and next week | 01/01/70 00:00 |