I am trying to opearate Leaf A/C compressor. It supposedly have 3 pole pairs and is wired for 96S battery, so my Ampera battery is ideal.
I am using my Volt inverter with Lebowski brain set to low amperage of some 15A.
First i tried to run motor with one Ebike controler and 50V. Compressor ran fine,
Then i connected Volt inverter and main battery. To get a reference for motor parameters i measured motor with inductance and resistance meter. I got good results. However when i tried to run motor FOC autotest i got strange readings.
leafdriveblog 
Are you having any success with the Leaf A/C compressor? Have you opened the Leaf A/C compressor inverter?
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I have succesfuly run Leaf AC cpmoressor with one chineese 48V controler. Also i had some sucess with Lebowski controller, but due to low current resolution motor had problems with starting. I designed controler for third power stage inside Volt inverter. I just got the boards and i am at assembly. It should run better since it has 50A current sensors with higher resolution for small drive. I hope to run compressor with this soon.
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Do you know Nissan’s specs for the A/C compressor – voltage, current, rpm, pressure…? Other than it being a brushless DC motor using PWM, I haven’t been able to find much information about the compressor.
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AC compressor seems like it is 3phase 6 pole BLDC motor. I am not sure if it is IPM like the Leaf motor. I was able to run it directly with 48V BLDC Ebike controler. No sensors.
Lebowski controller is still in the making. I had some success with the large motor controller, but its current sensors have much less resolution in lower amp range. I am now finishing my car and need every second for mechanical work and cable routing. I think later in august i will have m ore time to play with AC compressor. I see much will depend on fine acceleration control.
If you have more success by then let me know please.
tnx
A
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If you check the picture you will see my FOC measurement. 4000uH and 500mOhm. I think it is somewhat false due to low sensor resolution.. Manual measurement shows 9.22mH across two phases which gives some 4600uH. Not so bad… Resistance i get 4.3ohm cross two phases, which means single phase should have 2.15Ohm. Hm… this one is wildly off then.
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You’re correct, the Leaf A/C compressor is 3-phases BLDC. Manually measuring phase winding resistance should be much lower – something like 0.7 ohms. Which is why I’m wondering about Nissan’s voltage and current demands – especially under load. Hi-side gauge pressure is +300psi.
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