DC stay alive wiring

[GSR 800]

Hobbytrax sell DC stay alive capacitors. I've been considering them for some of my kit locos, as they lack flywheels and I use insulfrog points. 

https://www.hobbytrax.co.uk/products/dc-analogue-stay-alive?variant=41263923494965

The page says the simple wired version (sans 8 pin plug) can be hardwired across the motor. Presumably meaning one wire each to the two opposite eyelets of the motor itself? I am the furthest thing from a spark, would this not short the motor? 

 

[lucas]

Yes, you're reading it right, one wire to each side of the motor.

A capacitor doesn't allow current to flow through it, so it won't short. It only stores a small amount of current which it feeds back to the motor when voltage from the rails disappears.

[GSR 800]

1 hour ago, lucas said:

Yes, you're reading it right, one wire to each side of the motor.

A capacitor doesn't allow current to flow through it, so it won't short. It only stores a small amount of current which it feeds back to the motor when voltage from the rails disappears.

Many thanks Lucas!

[Andy Cundick]

Just fitted one to a Great Western LEO Class (Broad Gauge) and it works a treat Andy

[GSR 800]

19 minutes ago, Andy Cundick said:

Just fitted one to a Great Western LEO Class (Broad Gauge) and it works a treat Andy

Capacitors are en route for me!

Out of interest, how are you finding when you actually want it to stop Andy? 

[Andy Cundick]

Not a problem it doesnt act like a flywheel just gives a smoother run Andy