Re: home made power supply


Yukio YANO a écrit :

lerameur wrote:
Hello,

I built this circuit a little while ago and never got a chance to test
it:
http://www.uoguelph.ca/~antoon/circ/vps.htm
i di dsome test and something i do not understand is happening.
I can turn on some circuit with no problem but when it is time to turn
a motor, its a whole different story. The motor would turn for a while
then stop, no more voltage at the output. Or if i grab the shaft with
my hand and make it stop, it would not start again until a few second.
I do not know if its a bad power supply concept, or i was thinking that
my wires are not big enough, but nothing is heating in the power
supply. Any ideas?

ken

Over-Current Shut-Down circuit is being tripped. Too much current is
going through the LM317.
You need to drive the motor using an external Pass Transistor to shunt
the Motor Current around the Regulator circuit.
This is NOT an overheating problem. Heat-sinking will not help !

Well I only had some LM350 around, I added a heat sink to that and
put it in the circuit
The motor is running good, I stalled it and it starts again by its own,
something it did not do before.

ken

.

Relevant Pages

  • Re: home made power supply
    ... I built this circuit a little while ago and never got a chance to test ... i di dsome test and something i do not understand is happening. ... a motor, ...
    (sci.electronics.basics)
  • home made power supply
    ... I built this circuit a little while ago and never got a chance to test ... i di dsome test and something i do not understand is happening. ... a motor, ... I do not know if its a bad power supply concept, ...
    (sci.electronics.basics)
  • Re: Simple 555 PWM - disappointing performance
    ... >When making a motor controller, you first collect data on the motor, so 0.08 ... >an unusable circuit. ... It's called experimentation, and the fun is often in the journey, not ... language can't be construed as anything but an insult? ...
    (sci.electronics.design)
  • Proper Speed Controller Circuit for 24 VDC motor : electric bycycle
    ... an absolute novice with basic electronics, I was hoping someone here can ... I've basically narrowed the motor down ... throttle set-up for precise control). ... how to decide which particular circuit will suffice for the amp and volt ...
    (sci.electronics.basics)
  • Re: Circuit Designs
    ... The motor will be controlled by a PIC chip embedded in the circuit. ... Is it a cam that's pushing out food at intervals, ... I might suggest a design and pitfalls of ...
    (sci.engr.control)