GoldenMotor.com Forum

General Category => General Discussions => Topic started by: Just on December 31, 2012, 07:43:01 PM

Title: What current does burn the motor -> peak or continuous?
Post by: Just on December 31, 2012, 07:43:01 PM: Hi All,

What current does burn the motor -> peak or continuous?

Which current is more dangerous?

Are motors usually rated for the peak or continuous currents?

I have a 48V motor, which was rated by a manufacturer as a 350W one, but its controller is set to 17Amps for continuous current (48V*17A=816W) and to 22Amps for a peak current (48V*22A=1KW). How so?

Thank you!
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on December 31, 2012, 08:01:35 PM: Th only way to test when the motor will burn is testing by yourself hahaha :P

Peak is for short period and continuous....>>>it can handle the amps for long period.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on December 31, 2012, 09:47:38 PM: So, what current is more dangerous? How much is possible to over-current the motor?

How much the motor can consume the current? Infinitely? Do the motors usually have some over-current ?????????? circuit or this is the controller's responsibility?
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on December 31, 2012, 09:59:08 PM: I don't know how much current is dangerous for a motor, it depends of the design of the motor.
So you should ask the maker.

Motor with thick windings/copper wires can comsumes more amps.
Normally motor don't have any current protection.

Well some of them have a temperature sensor for protection >>>>to much current >>>>more heat.

So the contoller is the brain for safe operation.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Andrew on December 31, 2012, 10:07:51 PM: In geared motors Nylon cogs can get mashed up with too much torque/amps pushing them.
Too much power through thin wires will cause heat/resistance and can make wires melt in the motor.
You can control amps with programable controllers and with cycle analysts. It all depends on what your battery can deliver.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on December 31, 2012, 10:49:18 PM: Waauww that's a nice feature controlling the amp.
I can d this while ridding?

Does it work with Kelly controller?
I don't a CA3, I have just a simple Turnigy wattmeter :-[
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on December 31, 2012, 10:57:37 PM: Yes, Kelly Controllers may work in two modes - Boost and Economic. As for the Economic mode, it's about 60% in the current limit of the Boost one. These modes are switchable during the ride.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Lollandster on January 01, 2013, 09:58:05 AM: If you install a simple 10K NTC in the motor you can even have the CA3 limit the amps based on the temperature in the motor. This makes overwatting a bit safer.

With the latest firmware you can change power settings while riding.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on January 01, 2013, 10:16:56 AM: Aaha I didn't look at those features... :-[ While using the controller.... ;D
So I don't have buy the expensive CA3, just a simple switch 8)

Thanks!
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on January 01, 2013, 10:22:47 AM: Quote from: Lollandster on January 01, 2013, 09:58:05 AM
If you install a simple 10K NTC in the motor you can even have the CA3 limit the amps based on the temperature in the motor. This makes overwatting a bit safer.

What is the 10K NTC and what is CA3?

Quote
With the latest firmware you can change power settings while riding.

What Controller do you talking about?
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on January 01, 2013, 10:25:06 AM: How to use/install the 10K NTC thermistor into the motor? Do you have some instructions / guides how to do so?
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on January 01, 2013, 10:26:54 AM: Well it's quite simple, just install nearby the copper windings.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on January 01, 2013, 10:36:51 AM: I'll try, thank you! Should the thermistors be connected to the Controller's pins directly without any additional components between them?
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on January 01, 2013, 11:45:34 AM: Yup just to the temperature sensor input pins.
Title: Re: What current does burn the motor -> peak or continuous?
Post by: Just on January 01, 2013, 12:07:04 PM: Great! Thank you! I'll try! Would you recommend any specific NTC?
Title: Re: What current does burn the motor -> peak or continuous?
Post by: MAGICPIE3FOCUSPOWER on January 01, 2013, 02:46:41 PM: Yes just the the one they recommened in the controller manual.
I think that is the safest way... :)

CA3 = cycle analyst V3