30.45V Charger for Dyson V10 V11 V12 V13 V14 V15 Vacuum Charger,Replacement Charger for Dyson SV12 SV14 SV16 SV20 SV22 969350 217160 Absolute Animal Motorhead Cordless Vacuum Power Supply

I don’t have a Dyson… I just like to test power supplies for various electronics projects. 30 V is fairly rare, so I jumped on this one. If you load it less than 1.1 A, it can look like a regular power supply, reasonably constant regulated voltage.See plots 1 and 2 which show output voltage as the load current is varied. Above about 1.1 A, the supply voltage collapses rapidly, and basically the supply shuts down.Plot 3 shows behavior near 1.1 A load current in more detail. For my unit 1.09 A produced the normal 30 V, but asking for 1.095 A pretty much shut the supply down. This implied to me that the supply is more of a constant current source, which might be because it’s basically a battery charger.Plot 4 shows what happens if you try to ‘tug down’ the voltage with a constant voltage load. Full current (about 1.1 A) is supplied up to about 30.3 V, and above that, current ramps down until you hit about 30.54 V. Plot 5 shows, though, that if you try to pull voltage below about 11 V, the supply shuts down.Plot 6 shows the supply working into something like the most challenging load for 2 hours. The output current forced into a 30 V fixed load shows well under 1% variation over the time span, and continuous operation without overheating or shutting down.So, this may not be as general purpose as I was hoping, but for a very modest price, this supply can output 33 W or so continuously, and seems like it should perform well in the intended application. [...]