[PSUBS-MAILIST] PWM controllers

[Alan via Personal_Submersibles]

Hank,
are you working out the gearing for your electric manipulator?
I worked out that that 1/4 horsepower motor could lift 18kg, 1 metre in
1 second. Not bad for a tiny little motor! They are selling 200W
brushless motors for $14 on Hobby King.
Alan


Sent from my iPad

> On 5/10/2017, at 9:24 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
> If I have a 1\4 hp motor and I have the controller turning the motor at say 50 rpm, is the motor giving me 1\4 hp at 50 rpm?
> Hank
> 
> On Wednesday, October 4, 2017, 1:33:59 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hi Hank,
> yes. If you have your speed controller on full speed there would be no
> pulsing of the power to the motor, it would be fully on.
> You can have full power & no rpm in a stall situation. Most modern
> controllers I have seen have current limiting that you can program in;
> so in a stall or overloaded situation it would back off the power.
> Alan
> 
> 
> Sent from my iPad
> 
>> On 5/10/2017, at 7:56 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Hi All,
>> When a dc motor is speed  controlled with a PWM controller is the motor at full power regardless of rpm?
>> Hank
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