Re: re-post 24volt dc 100amp motor speed controller
- From: "Phil Allison" <philallison@xxxxxxxxxx>
- Date: Sat, 1 Jul 2006 18:07:53 +1000
"George Gosbee"
24volt dc 100amp reversing motor speed controller with dynamic breaking
slow
speed high torque required for the 750W 24v motor.
This is for a miniature seven and a quarter inch gage railway engine of
the
type used to pull sit upon carriages that will carry several adults or
lots
of kids. Power source will be 2 12volt leisure batteries about 65ah.
** The torque output from a DC motor depends on the amount of current
flowing it its coils - however, the heat developed in the same motor
depends on the square of that current value. Hence - one soon runs out of
available torque if you do not want to burn out the motor.
The power ( which does the useful stuff ) developed depends on the torque
multiplied by the rpms while the rpms depend on the applied voltage.
So, the best way and most efficient to use a DC motor to do useful work is
to have it spinning fast with a moderate current flow. I suggest you best
forget using a costly and fragile PWM controller for your application.
Arrange the two batteries so that they can be switched in series or parallel
when in use, ie to give 12 or 24 volts.
PLUS use a variable gear system ( sun and planet ? ) to couple the motor to
the drive wheels.
Get so much torque it will skid the wheels.
Very scale.
....... Phil
.
- Prev by Date: Re: Effect of lengh of wires in matrix
- Next by Date: Re: PCB layout for ADC
- Previous by thread: Re: re-post 24volt dc 100amp motor speed controller
- Next by thread: Re: re-post 24volt dc 100amp motor speed controller
- Index(es):
Relevant Pages
|
