Test bench with a Hub motor

[Eikfo]

Hi all,

I'm currently trying to assemble a test bench for a hub motor (this one), and I'm wondering about the type of link to the load machine, which is
an old standard DC motor. Due to the fact that one is a hub motor and the other one a classic, I have excluded the direct shaft connexion, so I have two other ideas to do it:

The first one is to use a platewheel sprocket, and to attach it in place of the disk brake on the hub motor, and another one to the shaft of the load machine, but I'm afraid that the lubrication of the chain will be difficult.

For the second one, it may be a dumb one, but I was thinking about using the hub motor itself as a pulley for a V-belt, with another one on the shaft of the load machine.

The first idea seems the most realistic to me but, as I am not a specialist, I'd like your opinion about the two solutions, or about another that I did not think about.

Many thanks in advance.

 

[amberwolf]

You might look at the ebikes.ca / Justin_LE hubmotor testing rigs, used to do the testing for the http://ebikes.ca/simulator page.

Sorry I don't have a direct link, but that page might have the info on it. If not, it's in one of Justin_LE's threads.

 

[Eikfo]

I'll look into it, Thanks

 

[crossbreak]

i have seen several benches with chains to connect two hubmotors. they all work fine. You need to lubricate the chain once a month if you use it daily. should not be too much effort

 

[John in CR]

What is it that you want to "test"? Simply take the measurements required for Miles Motor Comparison Spreadsheet and you'll get all the performance data you'll need. All you need is way to clamp the motor securely to get Kv and no-load current at 2 different rpm. The only thing missing would be heat rejection, and that's the primary limitation of hubmotors, which requires real world testing.