Model Boat Mayhem

Technical, Techniques, Hints, and Tips => DC Motors (Brushed) and Speed Controllers => Topic started by: Gardener on January 19, 2019, 08:56:33 am

Title: Speed Controller size
Post by: Gardener on January 19, 2019, 08:56:33 am

https://howesmodels.co.uk/product/mfa-540-5-pole-low-noise-6-12-volts/ (https://howesmodels.co.uk/product/mfa-540-5-pole-low-noise-6-12-volts/)


What size Speed viper marine Controller would I need with the above motor ?
Thanks

Title: Re: Speed Controller size
Post by: malcolmfrary on January 19, 2019, 09:27:12 am

Taking the numbers from the link provided -

Quote

Operating Voltage: 6-12 Volts


No Load Speed @ 12Volts: 6000RPM


No Load Current @ 12 Volts: 0.17Amps


@ Max Efficiency @12 Volts: 4930RPM


@ Max Efficiency @12 Volts: 1.6Amps

I would say any that are rated for your chosen voltage.  They start at 10A, which gives plenty of safety margin, but for a very few quid more, the 15 will do exactly the same job.

Title: Re: Speed Controller size
Post by: Gardener on January 19, 2019, 10:32:03 am

Thanks

Title: Re: Speed Controller size
Post by: john44 on January 19, 2019, 01:01:08 pm

I agree with Malcolmfrary, go 15 amp ,with a 10 amp fuse in circuit.


John

Title: Re: Speed Controller size
Post by: Gardener on January 19, 2019, 01:08:42 pm

Great will do !

Title: Re: Speed Controller size
Post by: Netleyned on January 19, 2019, 02:21:11 pm

I have been running a Springer on 540, 6V lead acid
15A mtroniks and a 10A fuse for the last 8 years.
In the lake twice a week and at least one rescue each outing. Never even stuttered.
Should say though motor is water-cooled.
She pushes everything from a Club 500 to HMS Hermes at 8ft and heavy





Ned

Title: Re: Speed Controller size
Post by: Gardener on January 19, 2019, 03:15:42 pm

 :-))