News:



  • April 30, 2024, 03:04:16 AM

Login with username, password and session length

« previous next »
Pages: [1]   Go Down

Author Topic: Motor Drag  (Read 354 times)

Offline Motorman

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 3261
Motor Drag
« on: February 25, 2020, 06:37:00 PM »
blank
« Last Edit: August 25, 2021, 06:24:22 PM by Motorman »
Logged

Offline Tim Wescott

  • 2016 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 12808
Re: Motor Drag
« Reply #1 on: February 25, 2020, 07:28:05 PM »
Because -- Science!

Any permanent-magnet motor will act like a generator if you spin it.  When the leads are open, the voltage generated just sits there on the wires, but when you short them, it goes to developing current in the windings.  That current makes torque, which resists you turning the motor.
Logged
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline John Rist

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 2947
Re: Motor Drag
« Reply #2 on: February 25, 2020, 10:43:04 PM »
That's how the brakes in an ESC works.  It shorts the leads together causing the motor to become a generator.
Logged
John Rist
AMA 56277

Advertise Here
Pages: [1]   Go Up
« previous next »
Tags:
 


Advertise Here