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I have worked with this type controller extensively before and I have the following comments on the above statements. 1. The voltage reduction of a Nola type controller will work on a large number of escalator applications. Jraefs comment that the escalators need to be minimally loaded is...

Thanks for the input guys. I think I may not have been clear in my initial desciption. The system is designed to control the motor to optimize power savings. What I am looking to do is provide a way that if a fault in our control circuitry exists, the load will still be powered, it will just no...

I am building a DSP driven motor controller and I am looking for a way to implement fail on functionality. Currently the DSP controls a triac that turns on and off when needed. Unfortunately, it is driven by the on board power supply and in the event of a controller or power supply failure I...