electric karting udc 52v

[yaroslav]

I decided to share my project too (electric karting ) I use an inverter powered by 52V maybe someone will be interested, to start I will post a photo of my controller

[yaroslav]

Now I will lay out the controller in assembled form, this is how it looks now

[yaroslav]

Схема отлично работает

[Alexstarex]

Привет. Круто получилось. Распиши характеристики.
В чем рисуешь? cad?

Hey. It was awesome. Describe the characteristics.
What do you draw? cad?

[yaroslav]

the inverter was designed for 72 volts, on the MOSFET irfp4110 I had at hand irfp3077 I used them, on the battery a maximum of 54 volts, the phase current of about 200 amps

[yaroslav]

power on the wattmeter when overclocking karting about 5 kW

[Jack Bauer]

Nice work:)

[yaroslav]

The boards were developed for me according to my schemes, I didn't ask what program they were developed in, I can find out

[johu]

Very impressive. Cool to see the Blue Pill getting used

[kiwifiat]

Nice job. I had a quick look at the schematic. My only comment would be that the output voltage from your current sensors will not be centered on 1.65v You may want to adjust the values of the voltage divider to get closer to the target 1.65v . I believe this is required by the STM32, maybe Johu could clarify if that is important? Without doubt accurate current readings are a prerequisite to good FOC or I guess if this is an induction motor it may not be relevant.

What motor are you driving with this inverter? I will be using a bluepill on an upcoming project so Johu please keep it as an option in the code base.
Pictures of you kart, motor, and controller would be nice.

[johu]

Nice job. I had a quick look at the schematic. My only comment would be that the output voltage from your current sensors will not be centered on 1.65v You may want to adjust the values of the voltage divider to get closer to the target 1.65v . I believe this is required by the STM32, maybe Johu could clarify if that is important? Without doubt accurate current readings are a prerequisite to good FOC or I guess if this is an induction motor it may not be relevant.

Haven't seen the schematic, most importantly the reading must never go above 3V3. Offset calibration is automatic, so if offset is e.g. 2V and you still never exceed 3V3 you'll be fine.

[yaroslav]

Nice job. I had a quick look at the schematic. My only comment would be that the output voltage from your current sensors will not be centered on 1.65v You may want to adjust the values of the voltage divider to get closer to the target 1.65v . I believe this is required by the STM32, maybe Johu could clarify if that is important? Without doubt accurate current readings are a prerequisite to good FOC or I guess if this is an induction motor it may not be relevant.

What motor are you driving with this inverter? I will be using a bluepill on an upcoming project so Johu please keep it as an option in the code base.
Pictures of you kart, motor, and controller would be nice.

The engine first used 90 dimensions, now put the engine with a combined winding type Slavyanka DA-90S, photos will soon do

[kiwifiat]

Your current sensors look interesting. What mV/A do they output and what ferrite cores have you used?

[yaroslav]

Depends on the gap in the ferrite ring, I cut 7mm, designed for a phase current of 400a



https://www.chipdip.ru/product/ss49e?fr ... st_product

https://www.chipdip.ru/product/b64290-l618

[kiwifiat]

Depends on the gap in the ferrite ring, I cut 7mm, designed for a phase current of 400a



https://www.chipdip.ru/product/ss49e?fr ... st_product

https://www.chipdip.ru/product/b64290-l618

Thanks for the response. What a great idea to build your own current sensors and at such a low cost The cheapest 400A current sensors I can get from Digikey here in Canada are $31.75 for one off and $20 for 200.

[yaroslav]

Only there is one inconvenience, you need to saw ferrite rings, very bad sawing, ferrite dust is very easy to get into the respiratory tract, you need to saw only with good ventilation, and preferably in a mask.

[yaroslav]

HI,

The photo my electric karting

[joromy]

Nice, like the recycled wood boxes.
Are you going to make wooden box for motor/inverter to.

Video pleeeease!!

[yaroslav]

[johu]

Sounds angry How does it drive?

[yaroslav]

Good traction in this engine, I can not achieve a dynamometer key, but if it is already turned , the torque is high, breaks the cameras in the wheels

[yaroslav]

Hi everyone , I made some more videos