einnh
Lifetime Supporting Member
I have been working developing winder systems for the past several years. They operate using winders running on AC induction motors and PowerFlex 755's with braking resistors sized for 110% power -- due to what I consider an overhauling layout.
I am not convinced we need braking resistors this large. On every unit I have built the resistors never get much above ambient temperature.
In an effort to optimize the system I wanted to see if there was a good way to measure how much of the braking resistor I am using in order to optimize but due to the nature of how they are used I'm not sure the best way of measuring this.
I know the DC bus is pulsed to the resistor, so I could attempt to measure voltage in those leads but I am not sure if I could capture and log quick enough for a significant amount of time.
Any ideas or suggestions would be greatly appreciated.
I am not convinced we need braking resistors this large. On every unit I have built the resistors never get much above ambient temperature.
In an effort to optimize the system I wanted to see if there was a good way to measure how much of the braking resistor I am using in order to optimize but due to the nature of how they are used I'm not sure the best way of measuring this.
I know the DC bus is pulsed to the resistor, so I could attempt to measure voltage in those leads but I am not sure if I could capture and log quick enough for a significant amount of time.
Any ideas or suggestions would be greatly appreciated.