On 9/25/22 19:39, andy pugh wrote:
On Mon, 26 Sept 2022 at 00:11, gene heskett wrote:
If the field supply fails, the motor runs faster and faster if it can,
until the armature parts
exit the frame in pieces big enough to make quite effective bullets.
If the field supply fails, how is there
If the motor is at base speed or above, things happen very fast.
Scott
On Sunday, September 25, 2022, 10:18:43 PM CDT, Ralph Stirling
wrote:
This only happens in lightly-loaded DC shunt field machines. Here is a
pretty good explanation:
This only happens in lightly-loaded DC shunt field machines. Here is a
pretty good explanation:
https://www.quora.com/What-is-the-run-away-condition-in-D-C-motors
My electric machines professor demonstrated this to my class 40 years
ago, He would kill the armature power before it blew up, of
On Mon, 26 Sept 2022 at 00:11, gene heskett wrote:
> If the field supply fails, the motor runs faster and faster if it can,
> until the armature parts
> exit the frame in pieces big enough to make quite effective bullets.
If the field supply fails, how is there any torque to spin the motor
On 9/25/22 11:20, dave engvall wrote:
On 9/24/22 11:18 AM, gene heskett wrote:
On 9/24/22 11:34, Jon Elson wrote:
On 9/23/22 17:24, gene heskett wrote:
Each brand of vfd seems to have its own setup. But that lf boost is
a tricky one. I don't know
if that invertor shows you the amperage
On 9/24/22 11:18 AM, gene heskett wrote:
On 9/24/22 11:34, Jon Elson wrote:
On 9/23/22 17:24, gene heskett wrote:
Each brand of vfd seems to have its own setup. But that lf boost is
a tricky one. I don't know
if that invertor shows you the amperage being delivered but it seems
it would be
