Search found 329 matches

by marcos
May 12 2019 5:17pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Is there any way of increasing the voltage excitation to the resolver? It seems to be around 2.7V which means the sin and cos inputs are significantly less. Have you tried different frequencies? Maybe it resonates at a particular frequency making the sin cos signals larger. The EXC signal is 12V, b...
by marcos
May 11 2019 8:51pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Boards! I've been looking at the general design and pondering what awesome project I would like to put one of these in and am curious about how the choice of battery/IGBT affects the possible power out. With the reference design at an awesome 100kW, would changing to 600A modules proportionately in...
by marcos
May 11 2019 1:59pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Its here: encoder detection.png But first you need to ensure the encoder readings are okay, like you were testing today. The encoder detection will try to make the motor spin, for that you need to setup the current and voltage limits, set the deadtime compensation, etc. It won't work if the angle me...
by marcos
May 11 2019 1:37pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

It seems logical that somewhere I need to tell the controller that there are 10 poles and 4 rotors? Yes, the controller needs to know the offset angle and the ratio of the encoder, its under the encoder tab. This would be the ratio. If your motor has 10 poles and the resolver is x4 it would create ...
by marcos
May 11 2019 12:44pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

x4 means that it provides 4 sine periods per shaft revolution. Its handy if your motor has 4 pole pairs. Imagine for instance that your motor has 14 pole pairs, so 1 mechanical revolution would take 14 electrical revolutions. When a x1 encoder measures 1° at the shaft, it would mean 14 electrical de...
by marcos
May 11 2019 10:59am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

That's great feedback, 2 things could be needing tuning: 1) Sin/cos signal voltage should be within some limits 2) Resolver can be tuned to work at some particular frequency Here is Axiom resolver circuit, pretty much the same as the previous version: resolver tuning.png 1): According to the datashe...
by marcos
May 11 2019 8:15am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Thanks Marcos, we will wait for ACIM support, another question: any idea about prices of the control board? (only pcb, fully assembled ecc) Yes, through the contact form please so we can keep better track. Once you're there you can join the newsletter as well ;-) These beta units are meant for engi...
by marcos
May 10 2019 5:31pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Hey Marcos, could you please tell us how much time it is going to take to have the support for induction motors? :D I don't really know, first we need to get Field Wakening and IPM support officially merged before we start the ACIM branch, and we will need to sort out other things as well. ACIM nee...
by marcos
May 10 2019 9:51am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

So we introduced individual IGBT temperature monitoring. PR here: https://github.com/vedderb/bldc/pull/92 Hardware was ready but was missing the code to deal with that. The board connects directly to the temp sense connectors, no wiring needed! Math is done for the NTC sensors present in FF600R07ME4...
by marcos
May 06 2019 4:37pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

In this case we might need to open the circuit between the controller and the battery. I mean that opening the circuit with the fuse or the contactors takes some time (tens of ms-s or more), and the semiconductors (antiparallel diode in forward conduction) may fail faster than that. Can't tell for ...
by marcos
May 04 2019 5:01pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Correct me if I'm wrong, but if the pwm stops in FW mode and the BEMF becomes so high that the phase-to-phase voltage exceeds the battery voltage then the antiparallel diodes start to conduct at the sine wave peaks at an uncontrollable high current. Isn't it true? If it is so, then the higher volta...
by marcos
May 04 2019 8:51am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

About FW downsides, keep in mind that small VESC's have been historically low voltage devices, with 60V as an absolute maximum. If at full modulation at 50V you are spinning the motor at 10000 rpm, if through FW you increase the speed to 12000rpm and somehow your pwm stops working (there are lots of...
by marcos
May 03 2019 7:09pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Wooot!! :flame: :flame: Field Weakening released! :flame: :flame: FW allows VESC to go beyond base speed and will unlock the constant power range of the machine. field weakening.png 02jA0u5V-X0 Iq current in red Id current in blue More info in the pull request: https://github.com/vedderb/vesc_tool/p...
by marcos
May 02 2019 6:13pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Thats the reason i also order smd stencil and i will use it to apply solder paste on board and arrange all components then use my reflow oven to finish things up. If you have any suggestions then please tell me as i am beginner I have a decade of experience assembling with solder paste, stencil and...
by marcos
Apr 29 2019 6:03pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

From where i can donwload the gerbers and bom for the AXIOM. I cant wait to put that in my bike. [emoji7] Its my first smd based project but i will try my best Gerbers are not available ATM, I fear the production of chinese boards with cheaper or poorly assembled components. You know, the people dy...
by marcos
Apr 26 2019 7:29pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

I know in the past the VESC firmware couldn't use IGBTs for switching elements due to the way it did auto-detection of some motor parameters; does this mean that IGBT support is now in the base firmware and could be used by smaller scale derivatives? Its actually not a firmware issue, its the hardw...
by marcos
Apr 25 2019 7:42am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Yay!
Screenshot_20190425_091453.png

Benjamin added a way to store custom information in flash, I might use that to store current sensor gain, which is currently hardcoded and not exposed to the gui, so I have several binaries for each current sensor part. I should fix that soon.
by marcos
Apr 22 2019 3:38pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Continuous flash memory CRC check was merged a few of days ago! In the hackaday project page I'm logging the new *merged* features, while here you get to know the new features before they are merged. Next pull request in the line is the detection of current sensor failures https://github.com/vedderb...
by marcos
Apr 17 2019 9:28pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Marcos, are you able to provide details on the fault codes? I have the fault light flashing when I power up the board and I am keen to debug. I have connected the throttle and I am able to calibrate it and see the throttle input working in the VESC input wizard. I haven't been out to my motor to ch...
by marcos
Apr 14 2019 7:10am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Sepex motors... thats a strange topology for an OEM, it has 3 phase, a neutral and slip rings for driving a separate field current. You would need a DC/DC converter for the field current, experiment a lot to know which ratios of inverter to field current are good, and figure out why they have a neut...
by marcos
Apr 13 2019 10:07am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

I have 2 5V connections and a 5VA connection (according to the screen on the Mitsubishi controller) I can see a 5V available on the rev D board, but what is the 5VA about?! Sounds like 5V Analog, its usually a more filtered/less noisy/weaker power rail. Is there any way I can check the resolver in ...
by marcos
Apr 13 2019 8:50am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Woot! Put some heat-shrink tubing on those current sensor wires, so they stay very very close together. You want the sensor signal to travel very close to its GND return path, with minimal loop area. That loop area will pick up lots of noise when the switching starts. If during testing your phase cu...
by marcos
Apr 13 2019 1:17am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

Any thought on this on your side? I'm well aware nowdays there are microcontrollers better targeted for motor control applications, with AEC qualification and specific peripherals, we plan someday using one of those. However the software effort to achieve such product is simply not worth it at the ...
by marcos
Apr 11 2019 9:51pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

I trust we will see a fully laminated DC bus. One would use a laminated bus to connect the switches to dc link capacitor with minimal ESL. Our capacitor is custom made, mechanically designed so it bolts directly to the IGBT modules, avoiding the cost and assembly of the laminated busbar. We were al...
by marcos
Apr 11 2019 7:00pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 414
Views: 88595

Re: VESC-controller: Axiom hardware released!

motherofgod.jpg The magnitude of engineering, research, and development here is astonishing! This Axiom controller is going to make some serious waves in the EV world. Congratulations to @marcos and team for cranking out this gem. I wanna be like you guys when I grow up. Thanks! You'll be there som...