@vishara-jyasekara Yes I've converted it with YourDyno instrument and PS, and I've sold the old control with all the boards to another LPS2000 owner that has got board issues just like you.

It works really well actually, as specific tasks for LPS2000 conversion I remember that I swapped the RPM sensor with an Hall effect one (they're VR), I've machined the RPM wheel to have less teeth and better spaced, and swapped the air lift system solenoid with a 230v AC one (it was 24V DC if I remember correctly).

The rest was just about wiring it all, and make it working with new data acquisition and brake power supply (test, calibration, etc.).

There's the wiki section for that, and Jostein is very helpful, if you have basic electrical knowledge (like how to build and modify home electrical system) you'll not have any issue in wiring the new system.

Hi danny_530 

We have a Chassis dynamometer Maha LPS 2000 with eddy current brakes which is not in operational condition. Has problems with its electronics controls (Main board). Rest of parts are in good shape. We planning to replace the electronics with a new system and software. It would nice if you can share your experience. Did you use a YourDyno instrumentation kit and YourDyno power supply? Is it compatible? if so was it hard to do the conversion? 

Specifications of what we have 

Manufacturer / Model : MAHA LPS 2000

Operational voltage : 230V,

Roller Set: R100/1 Passenger car/van

Eddy-Current brake: 1x 260kW

Voltage : 0V-190VDC / 16A

Thank you,

Jay

OK, I'll machine one of them to make a 20 teeth wheel from it, with dimensions suggested in "RPM wheel" wiki area

Wheels are 100 teeth

RPM sensors (there are two, one per roller axle ... ) 

Most def are VR, two wire....

Classic MAHA bar type load cell

@admin control signals, seems to be those 4+1 grey wires that comes from board in pic2.... That is one of the boards installed on the "main" board...

Yeah I was pretty sure it was a big "hardcoded" system 

Tomorrow I'll send a pic of the load cell (it's a bar type, I'm thinking to swap it and try to make the system capable to run vehicles in both rotation direction)... RPM sensor I'm afraid is VR, I'll also check it (and wheel teeth number)

Hi,

Lots of electronics there that you can just toss in the bin when you do the upgrade. You can reuse the load cell and possibly the RPM sensor (needs to be hall effect type or encoder type). Send a pic of the RPM sensor and I can advise.

Then about the power supply. Pic4 is the backside of the SCR bridge, but there needs to be a separate board controlling it. If the control signals come from the main board, then you need a YourDyno power supply too. 

Most eddy brakes consume about 20 amps of current at 192V DC. This translates to a bit less than that on the AC side. You should go with 1 phase, that is the standard. 

So send a few more pics and we can see what you need.

Last

Pic5

Pic4

Pic3

Pic2

Pic1

Finally I've brought it to my premises.

I'm trying to understand how the brake control works, to see how to make it working with yourdyno.

Anyway looks quite a lot of stuff, because it has boards for sensors, fan control, and so on.