Recent Posts

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11
General Discussions / Re: New member with a few questions
« Last post by Bikemad on November 25, 2024, 06:01:17 PM »
Hi Bargo andto the forum.

If the motor diameter is approximately 310mm you most likely have Magic Pies:





As you have the 10 Pin connector they could be any of the following three options;
  • late version MPIII
  • MP4
  • MP5




The wiring of the MPIII, MP4 and MP5 motors is very similar except the MP5 had the additional +5V supply on the controller's 5 pin connector.

The 10 pin connector connects to the control harness similar to the one shown below:


The 5 pin connector is used to connect to the USB programming lead, the LCD Smart display or the Bluetooth dongle on MP5.

Check out this post for more details regarding the cables on the controller.

Alan
 
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General Discussions / New member with a few questions
« Last post by Bargo on November 25, 2024, 07:37:25 AM »
Good morning everyone,

I have just got my hands on few electric bikes that has the golden motor of some version. I’m trying to find more information from them, on the plugs to the motor have three cables one for the battery 2 positive and 2 negative female pins and one 10 male pins and 5 male pins.

I assume the 10 male pins needs some kind of converter cable to go to brakes lights throttle

And the 5 pin goes to LCD

I will come with more questions but I could not find away to tell which version are these.

All my best,


P.s Hello Alan, I could not figure out how can I confirm my membership further, thanks a lot for all the posts.
13
General Discussions / Re: EZkontrol ESC beeping 6 times on startup
« Last post by Bikemad on November 19, 2024, 10:26:11 PM »
Hi andto the forum.

6 beeps would definitely indicate a MOSFET protection error if it was the older style GM VEC controller, but your controller is the newer EZ-kontrol type.  ;)

According to the EZkontrol Users Manual the 6 beeps indicate a "Motor Overtemperature" error.
As your video also shows an indicated motor temperature of 300°C, I'm guessing there may be a problem with either the Motor's temperature sensor or its wiring.

Unfortunately, I have no experience with the EZkontrollers or their programming software/Apps so I don't know if it's possible to temporarily disable the motor temperature protection to enable the motor to be quickly tested before locating the cause of the excessively high temperature reading.

Double check the temperature sensor wiring from the motor (the Black and White wires on the Hall Sensor connector).
According to the data sheet for the KTY84-130 temperature sensor it should have a resistance of between 970 and 1030 Ohms at 100°C (measured between the black and white wires on the motor with the Hall connector disconnected.)
I would expect the resistance to be lower than 600 Ohms (if your motor temperature is also at the same 6°C that's showing for the controller temperature) if the motor temperature sensor is working correctly.


                         Temperature (°C)

Hopefully it will be something very simple like a loose connection.



Alan
 
EDIT: Temperature/Resistance Curve Added
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General Discussions / Re: EZKontrol ESC beeping 6 times on startup
« Last post by Campbell3d on November 19, 2024, 09:49:12 PM »
From what I can tell 6 beeps from the manual is for motor overheating, but since your motor isn't running, you might need to lower the max phase current.

You are currently not using the EZkontrol tuning app, what you have is just the version for monitoring speed.

For android, download https://www.goldenmotor.com/apps/EZ-Tune.apk

Haven't done it, but for apple I believe you have to download from wechat. Check their video for download instructions. https://www.youtube.com/watch?v=BOG8MIpbnWI

Once you install the app, then you can adjust parameters like the max phase current. Also check your battery settings to make sure you are within range of the overvoltage protection. Since your motor is also a golden motor, in theory, you do not need to self learn. But if you continue to have issues, the self learn button is in the application. When you first hit the button, be sure to follow the on screen instructions and give it time.
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General Discussions / EZKontrol ESC beeping 6 times on startup
« Last post by Phrogz on November 18, 2024, 08:51:17 PM »
I bought a 72V 5kW BLDC Motor with a 400A 72V EZkontrol controller. Finally got it hooked up to batteries (and power switch, and accelerator potentiometer) this weekend. When switched on, I get a light and 6 beeps from the controller. I can connect to the controller via Bluetooth and the iOS app, but I don't see the majority of the settings described in the manual.

I've found online (I think) that 6 beeps means mosfet protection. What does this mean? What is it being protected from? How do I debug this and fix it? Have I missed some critical wiring? The batteries are supplying ~80V, but the specs say the controller should top out at 95V, so that shouldn't be the issue.

Additionally, is there another app that, for example, does the learning mode described in the documentation?

I have a short video of the setup and behavior here: https://youtu.be/Orf2QBU2NOA

Not shown in the video: we tried twisting the accelerator potentiometer to see if maybe the motor would turn despite the error; it did not.
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General Discussions / Re: Need help setting up 10kw motor and ezkontrol controller for electric buggy
« Last post by Campbell3d on November 13, 2024, 07:48:58 PM »
You're awesome Alan. Thanks for your help. I currently haven't tested with a load, so that might be a cause. If memory serves, I believe it is setup for torque control. I'll adjust those settings and see if that helps.

Wish there were more resources on all the parameters of the controller. I reached out to golden motor support, but they never responded. I take it, there isn't a true programming guide that exists. These are expensive motors and controllers to not have any additional reference material.

Justin
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General Discussions / Re: Need help setting up 10kw motor and ezkontrol controller for electric buggy
« Last post by Bikemad on November 13, 2024, 06:25:53 PM »
Hi andto the forum.

Unfortunately, I have no experience with the EZKontrollers so I don't know what benefit you would see by changing the firmware. If the 96V firmware is specifically tailored for the 96V motor, it might even make things worse.  :-\
I would try setting the battery parameters to suit your battery and then see how it performs.

The "all or nothing" throttle response is usually because the controller is using torque control instead of speed control and when there is insufficient load being applied to the motor shaft.

I haven't seen any rpm figures for the 120V 10kW motor but I would expect it to be similar to the 96V motor (~4130rpm) if you were running it on the expected 120V battery.
As you are only using a 96V battery, I would have expected the maximum speed to be ~3300 rpm (you may only achieve 80% of its rated speed if you're running it on 80% of its rated voltage) so your 3500 rpm is actually higher than I would have expected.

As the 96V motor develops it maximum power at 3611.9rpm, I would expect the maximum power from the 120V motor to be achieved at a similar rpm on a 120V battery, but this might also be reduced to ~2890rpm when running it on a 96V battery.
This means that your gearing on your buggy will need to be high enough to achieve your maximum speed at this lower rpm.

Alan
 

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General Discussions / Need help setting up 10kw motor and ezkontrol controller for electric buggy
« Last post by Campbell3d on November 12, 2024, 07:01:14 PM »
I'm in the process of building an electric buggy. I recently purchased an 120v 10kw liquid cooled motor and the matching 120v ezkontrol controller. My battery setup is only going to be 96v with capability of 200 continuous amps with a max of 400amps.

First question, since I'm only using a 96v battery, should I update my controller with a 96v firmware file for optimal performance or leave it alone and just manually set the battery parameters?

Second question, I have everything connected and have tested the motor/controller. I have also ran the self learn. I'm not happy with the throttle settings. It's pretty much all or nothing. The throttle can be at 50-75% but the RPMs have already reached the max (around 3500rpms), which honestly feels low for my setup. I was expecting this thing to scream. I haven't changed any of the settings because I'd like to learn what each does first. I have searched everywhere for a programming guide from Golden Motors about what the parameters do but can't find one. Does anyone have a copy of the guide? If not, I would appreciate any help or reference, so I can dial this thing in.

Thanks!
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Electric Motorcycle Conversion / Re: Special bike (old trial) converted but weak
« Last post by Triad on November 04, 2024, 12:12:02 PM »
This project is really a pain... when I got it it was too weak, now that I solved that it's got new problems (the belts not holding up)  :P

In all honesty I'm thinking about breaking it for parts, maybe fit the parts on a bycicle with shocks. At least it would be "road legal" and I could use it without peoples calling the police  ;D
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Electric Motorcycle Conversion / Re: Special bike (old trial) converted but weak
« Last post by Bikemad on November 04, 2024, 10:23:19 AM »
Quote from: Triad on November 03, 2024, 04:09:29 PM
Is there a way to make it easier to go in reverse? I mean, if you need to park the bike and you try to pull it backward, there's a lot of resistence. Is it normal and is there a way to avoid this?

The resistance is caused by the extreme gear reduction. A 12:1 reduction increases the torque at the back wheel by a factor of 12, but this also make it 12 times more difficult for the wheel to turn the motor.  ;)

To overcome the motor drag resistance, I would fit a momentary switch (i.e. a horn switch) on the left hand side of the handlebars and connect it to the reverse wires so that you can simply press and hold the switch to engage reverse and then use the throttle as required.
You should also reduce both the Backword speed ratio (%) and the Reverse torque ratio (%) settings to ~25% (or maybe even lower) to ensure you don't accidentally apply too much power or go too fast in reverse.

Alan
 
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