openinverter forum

Posted: **Fri Feb 14, 2020 4:50 pm**

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

Posted: **Fri Feb 14, 2020 4:53 pm**

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

Posted: **Fri Feb 14, 2020 5:02 pm**

Схема отлично работает

Posted: **Fri Feb 14, 2020 6:08 pm**

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

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

Posted: **Fri Feb 14, 2020 7:24 pm**

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

Posted: **Fri Feb 14, 2020 7:25 pm**

power on the wattmeter when overclocking karting about 5 kW

Posted: **Fri Feb 14, 2020 7:25 pm**

Nice work:)

Posted: **Fri Feb 14, 2020 7:35 pm**

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

Posted: **Fri Feb 14, 2020 8:28 pm**

Very impressive. Cool to see the Blue Pill getting used

Posted: **Sat Feb 15, 2020 7:47 am**

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.

Posted: **Sat Feb 15, 2020 10:11 am**

kiwifiat wrote: ↑Sat Feb 15, 2020 7:47 am 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.

Posted: **Sun Feb 16, 2020 5:30 pm**

kiwifiat wrote: ↑Sat Feb 15, 2020 7:47 am 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

Posted: **Mon Feb 24, 2020 1:04 am**

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

Posted: **Fri Feb 28, 2020 4:41 pm**

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

Posted: **Mon Mar 02, 2020 6:53 am**

yaroslav wrote: ↑Fri Feb 28, 2020 4:41 pm 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.

Posted: **Wed Mar 04, 2020 8:17 am**

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.

Posted: **Tue Mar 10, 2020 6:56 am**

HI,

The photo my electric karting

Posted: **Tue Mar 10, 2020 7:40 am**

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

Video pleeeease!!

Posted: **Tue Mar 10, 2020 8:40 am**

Posted: **Tue Mar 10, 2020 2:26 pm**

Sounds angry

How does it drive?

Posted: **Wed Mar 11, 2020 6:16 am**

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

Posted: **Tue Mar 24, 2020 7:57 pm**

Hi everyone , I made some more videos

openinverter forum

electric karting udc 52v

electric karting udc 52v

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Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v

Re: electric karting udc 52v