Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.  (Read 1627 times)

rathikrishna

  • Guest
MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« on: December 28, 2010, 12:36:48 PM »

Friends, all we know, that, one of the real threat, while playing with RC ships and boats is MOTOR stalling, means jamming of the motor with many reasons.first one is stranding the propeller on anything from a weed to nets, and jamming brush also can cause stalling. the jamming of the armature,makes ample of heat, as it drops a high degree of Amperage, cause potentialy disastrous results.one of the ever simple damage inflicted by this  incident is burning of the ESC we used. a heavy money loss will occur instantly. here i am posting a simple proven circuit, for years, to protect our entire unit.
Logged

rathikrishna

  • Guest
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #1 on: December 28, 2010, 12:37:24 PM »

as we can see here, some simple components are used.here transistor BC77 ,metal case acts as a temperature sensor,as its leakage current differs ,accordance with the temperature it stands.this variation is used for biasing an other transistor,and triggering circuit.BC 108 is used as  a buffer amp between the sensor and triggering circuit.AC 128 is used to drive a relay here.we can simply adjust the temperature by adjusting the 470Kilo Ohms potentio meter.we can use any general purpose transistors here, but take care to take only metal case transistors as sensors.

how it helps us..? 
Logged

rathikrishna

  • Guest
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #2 on: December 28, 2010, 12:37:58 PM »

Here the answer...when a stalling occur, a great heat will produced on the ESC, and motor itself.so we now theres always will be a safest maximum temperature levels, as we use our crafts in water.we can simply fix the metal cased transistor, on ESC, or motor by a simple aluminium clamp or by a screw.then we can adjust the value of the biasing voltage by reseting the 470 K ohms resistor.

we can set the preset, just above the maximum temperature after running our craft for several minutes.so when a high heat sensed by the sensor it triggers the other.instantly the relay energised. opening the DC voltage line to the ESC circuit. so we can save our ESC and motor simultaneously.
Logged

Geoff Cropper

  • Guest
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #3 on: February 12, 2011, 11:30:40 AM »

Hi Rathi,        Can you draw a wiring diagram please,   thanks a lot.    Geoff.
Logged

Geoff Cropper

  • Guest
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #4 on: February 12, 2011, 11:35:07 AM »

Hi Rathi,     Please disregard my last post.      I've just seen the diagram on the other thread.     Regards,   Geoff
Logged

Shipmate60

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 5,239
  • You bark - I will bite!!!
  • Location: Fareham
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #5 on: February 12, 2011, 11:45:21 AM »

Rathi has been rather quiet since being confirmed as a male.

Bob
Logged
Officially a GOG.

Colin Bishop

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 10,136
  • Location: SW Surrey, UK
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #6 on: February 12, 2011, 12:12:57 PM »

Quote
Rathi has been rather quiet since being confirmed as a male.

I'm not surprised, I imagine it would come as a bit of a shock to anyone..... :}
Logged

roycv

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,278
  • Location: S.W. Herts
Re: MAKE THIS SIMPLE MOTOR STALL PROTECTION CIRCUIT.
« Reply #7 on: February 12, 2011, 02:47:25 PM »

Hi all, I see that the personal details suggest female still.  I don't think that gender should be of concern to us but the o/p of Rathi has shown that it does.
Personally, as a male dancer (what connotations there, I wonder!) I much prefer not to be the one dancing backwards.
Still, nice to see the enthusiasm, but honesty also has its merits.
kind regards Roy
Logged
Pages: [1]   Go Up