Search found 264 matches

by johnspark
Tue Apr 18, 2023 5:48 am
Forum: Inverters / Motor Controllers
Topic: Boost converter simulation
Replies: 1
Views: 451

Boost converter simulation

Boost converters are free with the Toyota inverters, they are worthwhile exploring to see what they can do for us.

Soon I will start submitting LT Spice simulations here, all comments will be welcome as usual.

Kind regards,

Johnspark
by johnspark
Tue Apr 18, 2023 5:45 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

Thank you for your thoughts Pete9008. Sorry about your health issues.
Sounds very interesting about not needing the boost converter. Reduces the complexity quite a bit.
by johnspark
Mon Apr 17, 2023 12:42 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

I would like to start a boost converter simulation topic under Software, but cannot find a 'New topic' button, would someone please start one for me,

Kind regards,

Johnspark
by johnspark
Sun Apr 16, 2023 11:01 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

So what I am doing, is using Prius Gen 2 MG1 and MG2 with 5 speed manual gear box, with up to 350 V battery, and AVV50R inverter. So need to use the boost converter. My car is an E39. Yes I know, far too heavy etc. Its about history. When I started it was about looking for a 13 inch DC motor, or $30...
by johnspark
Sat Apr 08, 2023 8:28 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

This model now has adjustable mark/space ratio via the adjustable battery. Very happy with this model, it can be adjusted, and gives realistic values :). For this example, I have 3 different mark space ratios for initial conditions, to reduce the large inrush current (slows down speed of getting HV)...
by johnspark
Sat Apr 08, 2023 7:00 am
Forum: Classifieds
Topic: zeva BMS
Replies: 6
Views: 716

Re: zeva BMS

Ah Mike, well that's better. Which modules can you get?
by johnspark
Sat Apr 08, 2023 12:03 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

I can also adjust mark space ratio by adjusting +/-DC offset of sinewave generator. So model becoming more realistic and simpler.
by johnspark
Sat Apr 08, 2023 12:02 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

i took your advise Pete and got rid of the D flip flop. But found I could replace it and the buffer with a schmitt buffer. Now I am getting sensible results. For a 250V battery and approx 500V output, current from battery is approx double that going to load resistor. Also that saw tooth waveform sup...
by johnspark
Thu Apr 06, 2023 10:51 am
Forum: Toyota/Lexus
Topic: Denso ES27C AC Compressor control (Toyota/Lexus)
Replies: 49
Views: 11670

Re: Denso ES27C AC Compressor control (Toyota/Lexus)

I still have my Hybrid Camry AVV50 of which I can test the Denso compressor. I have uploaded signals before, but I could redo assuming my compressor uses Lin bus too perhaps?
by johnspark
Thu Apr 06, 2023 9:42 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

Today I was able to measure the inductance of a MG1 generator from a Prius V2. Please note, I did not turn the shaft for these measurements. Here are the values, These measurements are across 1 phase and the other two phases placed in parallel. M1 = 2.2mH M2 = 1.2mH M3 = 2.2mH. Using your formulas P...
by johnspark
Thu Apr 06, 2023 9:36 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

Will try these things Pete9008 .
by johnspark
Tue Mar 28, 2023 8:09 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

I have made an LTspice XVII model, and have put one graph on the forum: image.png Operation is more complicated than I thought it would be. I have included the file as well below. So far my model only has equal mark / space ratio, but battery voltage and parameter values can be changed. If anybody w...
by johnspark
Tue Mar 28, 2023 7:58 am
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

Thank you Pete9008, perhaps we can think of the boost inductor system as a transformer in the AC world so power in is power out, but we can double output voltage at expense of output current being only 1/2 the input current.
by johnspark
Sun Mar 26, 2023 11:43 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

Thank you Romale, I will think about this a bit more...
by johnspark
Sun Mar 26, 2023 9:46 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

I think there is value in boost converters for high L motors. To me it seems the higher the battery/boost voltage the more efficiently the motor can run (apart from extra losses in the boost system). Limits of boost system are: current boost inductor and IGBTs can handle, and I think power capabilit...
by johnspark
Sun Mar 26, 2023 9:41 pm
Forum: Inverters / Motor Controllers
Topic: IPM Motor Simulation and FOC Software
Replies: 986
Views: 105135

Re: IPM Motor Simulation and FOC Software

This leakage inductance would be a fairly small number for high inductance motors, but may be a lot more important for low L motors I presume?
by johnspark
Fri Mar 24, 2023 9:57 am
Forum: Projects
Topic: [DRIVING] Audi A2 /w Prius Gen2 Transaxle & Inverter [FINISHED]
Replies: 343
Views: 59143

Re: Audi A2 /w Prius Gen2 Transaxle & Inverter [FINISHED]

Hi Johu,

is there somewhere that you have tabled your optimum MG2 parameter values?

Kind regards,

Johnspark
by johnspark
Wed Mar 22, 2023 3:30 am
Forum: Inverters / Motor Controllers
Topic: Measuring IPM Motor Parameters from Plots
Replies: 37
Views: 12746

Re: Measuring IPM Motor Parameters from Plots

EMC with very sharp voltage source waveforms.

For Toyota motors, each individual phase wire is shielded, so no voltage EMC from the 3 phase supply wires.
As far as current EMC, if the motor has high L, current EMC will be low...
by johnspark
Wed Mar 22, 2023 3:28 am
Forum: Inverters / Motor Controllers
Topic: Measuring IPM Motor Parameters from Plots
Replies: 37
Views: 12746

Re: Measuring IPM Motor Parameters from Plots

I agree with aiming for 80% with only 20% effort :). Well here is some info on harmonics to help understand this stuff a bit better. image.png So there are no rotation forces on the motor either positive or negative, but we do get the center of the 3 windings wanting to do something, so if the neutr...
by johnspark
Tue Mar 21, 2023 8:37 am
Forum: Inverters / Motor Controllers
Topic: Measuring IPM Motor Parameters from Plots
Replies: 37
Views: 12746

Re: Measuring IPM Motor Parameters from Plots

Probably everyone thinks the lambda discussions are finished, but I am a bit slow. [While everyone is having main course for dinner/tea, I am still eating ice cream desert from lunchtime]. :lol: So I got this page out of the Evaluation of 2004 Toyota Prius Hybrid Electric Drive System Oakridge pdf. ...
by johnspark
Tue Mar 21, 2023 6:59 am
Forum: Toyota/Lexus
Topic: Knocking noise in camry hybrid transaxle
Replies: 4
Views: 789

Re: Knocking noise in camry hybrid transaxle

Ah that is very pleasing to read Dxtawise :)
by johnspark
Fri Mar 17, 2023 9:23 am
Forum: Classifieds
Topic: zeva BMS
Replies: 6
Views: 716

Re: zeva BMS

OK Ieman2112, I am interested, how much to also get to Adelaide South Australia?

Kind regards,

Johnspark.
by johnspark
Fri Mar 17, 2023 9:18 am
Forum: Toyota/Lexus
Topic: Characterisation of Prius Gen3 Inverter Over Current and Over Temperature Trips
Replies: 14
Views: 1316

Re: What's the best way to handle desat on Toyota inverters with OpenInverter logic board?

Ages ago Pete9008, I downloaded a pdf of an IC, and had another one printed off of an IGBT which I have turned into 2 jpg pages (sorry missing pg 48). Here it is for you. It uses the ESGAK. AK terminals are for a diode on the substrate isolated from any other connections, used for measuring substrat...