Week 7: 10/03 - 10/10

On October 03, 2018:

-> Following up with the projects, we met with our mentor to narrow down the motor that we are going to use for Makers Faire.

Specification:
- Motor type:  M12500 - 3A by MAC motor
- Brushless DC hub motor
- Rated Power: 600 - 1000 [W]
- Rated Voltage: 36 [V] / 48 [V]
- Speed: 2000 - 4000 [RPM]

We are currently keeping in contact with MAC motor for more detail information, such as:
- Customizing planetary gearbox
- Exact dimensions of the motor
- Possibly customizing shaft design and length


-> We spoke with the control team to discuss KBL controller for controlling the motor speed. KBL controllers are a device that sees voltage and converts that into motor speed.

-> We spoke with our mentor about our concern about the motor overheating while running at 2 miles per hour for few minutes during Makers Faire. We believed that in order for the bogie to run at 2 miles per hour, our motor has to run at a low RPM. However, according to the specs provided by MAC motor, the M12500 - 3A motor will run from 2000 to 4000 rpm. A solution we came up after discussing with our mentor was to use a planetary gearbox to help to provide more stall torque power and reduce RPM. In a way, we want to decrease the speed of the bogie while increasing the RPM of the motor to avoid overheating.

-> We talked about Tesla Pump as an additional system to avoid overheating of the motor.

Future plans:
-> Decide on the gear ratios of planetary gearbox for motor
-> Decide on how to mount planetary gearbox to the motor (design casing)
-> Design shaft for customization

Comments

  1. Eric HagstromOctober 15, 2018 at 10:03 AM

    Great post! According to the schedule (see the main post by me on the SpartanSuperway.blogspot), your team should be working on your designs required for your particular project.

    This week I want to see some initial sketches / CAD work done, and where you intend on mounting your planetary gearbox (are you designing this, or is MAC motors providing this??).

    I would also like to see how you will design your drive shaft to enable all 4 drive wheels to work together.

    How will you mount your motors to the chassis?

    What system did Tesla Pump provide in regards to cooling the motor?

    ReplyDelete

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