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Yay finally able to join 4HV! I've been a long time lurker, now feel the need to ask a few questions!
I've picked up a few used AC motor controller and motor (both ~100kw) that I like to do a basic bench test (with my caps I have on hand) to verify basic controls to see if it's still functional. i.e. start motor slowly up (no load), watch wattage usage, when it hits 1200 watts, unplug AC power source. Watch voltage on caps until it hits 300v (low voltage cutoff for motor controller.) Then put motor controller into regen mode and slow/stop motor rotor. Verify voltage on caps goes up.
I'm thinking about doing this setup, and I figured I show what I'm going try to do to see if anyone sees any major mistakes I'm about to do.
I've picked up a this module AIF04ZPFC-02NTL where it will take 240v AC to 380v DC at 1600 watts. I then have 800v 8amp diode inline that connects to my bank of 12 450v 2000uf caps. The diode prevent regen energy from going back to the AC/DC module. From there I connect it to the motor controller. I know I'll likely have to pre-charge my caps, since I don't want to overload the AC/DC module when first turning it on, so I have that covered. Other than pre-charging, monitoring wattage (at AC source), and voltage monitor on caps, is there anything else I should be doing?
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
I repair drives almost every week....
I/we usually test a drive using filament lamps before connecting a motor as a fault in the drive could have nasty consequences. If you give the manufacturer and model number I may be able to help.
Registered Member #4081
Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
One option would be to get two 240 - 110 transformers, wire the 110 side of each transformer in series, then wire the 240 side in series, should get around 400 - 440 volts.
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
a full wave dublier would do. you can turn 120vac into 380vdc or if you use a bridge rectifier and rectifie your 240 and filter it with your caps you will get a better power factor.. I just bought a 1500w 110,220 to 110,220 transformer for isolation purpaces for testing. just remember to use a soft start circuit for the charge or you will get a large inrush and break something.
Sulaiman: that is a good idea to use the "filament lamps" as current limiter! At first I was sure that the motor controller will throw a fault as it was expecting a certain minimal load.. but that might not be the case as the motor could already be spinning (i.e. going downhill) before applying power..
FAN4800IN is good idea, agreed part count little to high for me to build right now.
As you may have guess by now, it's AC electric motors. These motors came out of electric bus, I'm planning on putting two of them into a car :) Also 100kw is just it's peak, it's average continuous usage is much lower.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Spaceballs3000 wrote ...
Also 100kw is just it's peak, it's average continuous usage is much lower.
Ah that makes things abit easier, you can, if PF is a problem use a special type as seen on Steve Wards site. it has a lower part count and can be modded for your purpose.
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Best way to get ~380V @ 4 Amps from 120v/240v circuit.
