JasonA
Well-known member
garygid said:OK, let's investigate a Bursa-based micro-QC solution,
even if not terribly practical at the moment.
Let's begin by getting answers to some basic questions...
The Bursa has an isolated HV output, right?
240v in, and air cooled, with around 3.3 kW out?
Correct.. Fully isolated between the in & outputs..
garygid said:The only control of the is CAN, right?
Or, are there other control lines as well?
If you want "FULL REAL TIME" control then yes.. CAN is the way. There is an AUTO mode where you set control points, etc. This is how I ran it before we integrated it with Greg's unit. But for this project, it will require CAN control..[/quote]
I asked the "master" this.. waiting for a response.. the battery is not connected at this point correct?garygid said:Can the output voltage be ramped from zero to max
(or a few volts to around 450 volts), and then ramped back
down, under no-load conditions, using its CAN control?
Have not measured it with a scope, but as fast as I demand power, it comes up right away. So probably fast. I've watched all you guys with CHAdeMO units ramp up to 60a... The Brusa does just as quick, just to 9a :lol:garygid said:How fast can the current be ramped up, under CAN control?
The car asks for 2 amps more each 1/10 second,
but the QC does not have to follow exactly.
However, the car does not tolerate too much delay.
Yesgarygid said:Can the output current be shut off abruptly, with the
Output voltage falling quickly?
Dead on pretty much (+- 1%) it's the voltage that's off because the Brusa only has 8bit sampling. So towards the top end, it shows 395v (example) and the battery is really at 391v. I think newer units have upgraded CPU's.. waiting for response.garygid said:How well regulated is the output current?
would have to meas with a scope.. I've read on DIY that it's "pretty damn clean"garygid said:What noise is present in the HV output.
Fully on both sides so you can't screw it up!garygid said:Is there any reverse-polarity protection built in?
It has all types of options and outputs. Victor uses the outputs to drive LEDS that look like the Leaf's 3 LEDS on the dash to give him status updates.garygid said:Other than HV and CAN, does it have any other outputs?
Don't know what u mean by this?? They are all isolated and have their own outputs and seperate pins/ground. It's logic grnd.. not case/PE.garygid said:The CAN and any other control or status signals
are referenced to protective (earth) Ground?
As often as you want to sample it. up to 1,500/sec CANgarygid said:How often can the Bursa be "commanded"?
Here's a link to their CAN MATRIX...
http://www.metricmind.com/data/can_201_nlg5xx.pdf
USER MANUAL...
http://www.metricmind.com/wp-content/uploads/2011/11/Manual_V1.792.pdf
Hooking MANY up together works great together.. and they communicate and command perfectly.