Team Update - 4/2/2013

[David Brinza]

I really can't tell you how many times we've been bitten by sinusoidal depleneration until we learned about the Allen-Bradley Retro Entabulator.

Rockwell Automation provided a timely solution to a previously unknown and un-encountered problem.

[Grim Tuesday]

Let me just whip up a GUI in visual basic!

[Mike Copioli]

In a nut shell;

The Talon reverses the output polarity to the motor every off period of the duty cycle.

The Talon SR simply "Brakes" during the off period of the duty cycle. This is type of rectification that the Jaguar uses.

This type of rectification produces less heat at the Talons input capacitor during stall.

It does not change the linearity or maximum output power. It does however produce significantly less heat during motor stall.

[Racer26]

Originally Posted by Mike Copioli

In a nut shell;

The Talon reverses the output polarity to the motor every off period of the duty cycle.

The Talon SR simply "Brakes" during the off period of the duty cycle. This is type of rectification that the Jaguar uses.

This type of rectification produces less heat at the Talons input capacitor during stall.

It does not change the linearity or maximum output power. It does however produce significantly less heat during motor stall.

Correct me if I'm wrong Mike, but will the SR not behave differently on a non-level surface (like the 2012 bridges) in terms of controlled descent?

[Mike Copioli]

Originally Posted by Racer26

Correct me if I'm wrong Mike, but will the SR not behave differently on a non-level surface (like the 2012 bridges) in terms of controlled descent?

The behavior during the off period is to decay the fly-back/freewheeling current from the motor. Instead of redirecting the current back into the system like the Talon, the Talon SR simply connects the motor leads together. The observed mechanical behavior for both open and closed loop control among both devices is almost identical.

Both methods result in a very rapid decay of flyback current.

[Racer26]

TL;DR version: yes, technically they're different, but in practice it has little tangible effect. Cool