[PSUBS-MAILIST] Motor Suggestion?

Tue May 15 18:16:52 EDT 2018

James,
a bit more info; it is made by Golden Motors, China.
https://www.goldenmotor.com/frame-bldcmotor.htm
main site...
https://www.goldenmotor.com/
There is a lot more info here along with accessaries.
Not sure what freight would cost you, but the price is better & the speed
controllers would be compatible.
Alan

Sent from my iPad

> On 16/05/2018, at 9:37 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> James,
> just thought you are probably putting it in your hull & driving a 
> pulley on the propeller shaft. So ignore the last email lol.
> I would think you could get something a lot cheaper, but make sure
> it has good bearings.
> Cheers Alan
> 
> Sent from my iPad
> 
>> On 16/05/2018, at 9:28 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Hi James,
>> just had a look at the motor & it's a bit of a beast.
>> Looks like an in-runner. It says elsewhere it is cooled with a fan but has
>> the option in the check box for air or water cooling.
>>    If you have a look at the Dragon submersible, they have gone with some
>> large diameter but short motors that resemble the high torque direct drive
>> bicycle hub motors that are popular. On the Dragon submersible it looks
>> like they have developed thier own propeller so that the thrust isn't hitting
>> the body of the thruster.
>> The cooling system on your motor isn't going to work if you put it in a water/
>> pressure proof enclosure. With the in-runner the coils are on the outside
>> & can dissipate their heat through the can, so there would be the option
>> of fitting the motor tightly in to a housing & letting the heat go through the
>> housing into the water; but the fins on the motor won't let that happen in
>> this case. Maybe grind them off. It has a temperature sensor so there is the
>> option of monitoring the temperature & running it at a suitable power. Some 
>> escs can drop the power automatically if the temperature gets too high.
>> The motor is very expensive. There is this Maytech motor designed for electric
>> surfboards that is rated at 600W
>> http://www.michobby.com/product/electric-surfboard-skateboard-e-bike-brushless-motor-8085-160kv-motor/
>> It is an 8085 160 kv out-runner & priced at $188- US. I am wanting to test 
>> one of these but will test my smaller motors first to get a better idea of what 
>> kv winding I should have. Maytech will wind to your specifications; I think you 
>> have some knowledge of the RC world so you will understand this.
>> This motor being an out-runner has the coils on the inside & so I am relying
>> on oil for cooling. 
>> You will need to replace the propeller shaft with a longer stainless shaft.
>> Your motor is designed to drive a pulley & you would have to check
>> what axial load the bearings take. In my thruster design I have my motors
>> suspended between two bearings in the thruster housing that take the
>> forward & reverse axial load.
>> Alien Power in England have some large brushless motors & motor controllers.
>> I think he's a small operator & he will respond to questions. Got an idea he's
>> in Birmingham.
>> I am focussed on my thruster testing at the moment, but could not put a 
>> time on when I will test the 8085 motor. You can keep an eye on my progress
>> if you want to hold off your thruster build.
>> There is an electric surfboard site that are using large DC motors, that may be
>> of help, but these boards are doing 40kph, so are more like planning boats
>> rather than submarines that fall in to the work boat category.
>> Good luck.
>> Alan 
>> 
>> 
>> 
>> 
>> Sent from my iPad
>> 
>>> On 16/05/2018, at 3:51 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> hi all
>>> 
>>> I am thinking about what motor I should use for my main thruster on
>>> Skadoc.  Its got to be big.
>>> 
>>> All these ideas are just thoughts at the moment, as I am working on
>>> battery pods now.
>>> 
>>> Expecting delivery of pipe from UK today.
>>> 
>>> So I have time to think how motor configuration is going to work.
>>> 
>>> What do you guys think about this motor choice here?  As a possibility.
>>> 
>>> https://www.miromax.lt/en/m-6/c-39/c-45/product-500-bldc_motor_hpm-5000b_-_nominal_power_5-86kw
>>> 
>>> I have room for 12 x12v batteries, so all voltages are a possibility.
>>> 
>>> I am also thinking of running an inverter and working at 120v AC.
>>> investigating this.
>>> 
>>> Regards
>>> James
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
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