Hi everyone,
I built a huge constant current rectifier using zero point swtching controller, but the result is not as I expected. The complete diagram (in 2 pages, fig. 1 and 2) can be found at :
HTTP://usb06net.multiply.com and the components list is in attachment
The load is a series of lead-acid otomotive batteries. The desired charge curent is set by rotating the 2K-B POT. The charger will now maintain the preset charge current. The max of I is 60 A-DC.
Problems :
1. Why the system not works efficiently? At I = 30 A-DC, T1 requires 60 A-AC from source, while other branded system only needs 33 A-AC.
2. Why the system unstable? The preset charge current varying more than (+/-) 0.5%, while other branded system only varies (+/-) 0.2% max.
3. At the 2K-B POT in full-clockwise, the charger produces I more than 60 A-DC, meanwhile the T1 rating is 60 A-AC.
Any help would be much appreciated.
Please attach some figure/drawing if necessary.
Best Regards,
leonard
I built a huge constant current rectifier using zero point swtching controller, but the result is not as I expected. The complete diagram (in 2 pages, fig. 1 and 2) can be found at :
HTTP://usb06net.multiply.com and the components list is in attachment
The load is a series of lead-acid otomotive batteries. The desired charge curent is set by rotating the 2K-B POT. The charger will now maintain the preset charge current. The max of I is 60 A-DC.
Problems :
1. Why the system not works efficiently? At I = 30 A-DC, T1 requires 60 A-AC from source, while other branded system only needs 33 A-AC.
2. Why the system unstable? The preset charge current varying more than (+/-) 0.5%, while other branded system only varies (+/-) 0.2% max.
3. At the 2K-B POT in full-clockwise, the charger produces I more than 60 A-DC, meanwhile the T1 rating is 60 A-AC.
Any help would be much appreciated.
Please attach some figure/drawing if necessary.
Best Regards,
leonard