I am using 2 lionel type V four track controllers with a full wave rectifier on each output. Someone suggested using half wave rectifiers instead, for better low speed control. Is this correct, or did I misunderstand him. Also will this have an affect the higher speeds.
Uncle Fester
ccg I am using 2 lionel type V four track controllers with a full wave rectifier on each output. Someone suggested using half wave rectifiers instead, for better low speed control. Is this correct, or did I misunderstand him. Also will this have an affect the higher speeds. Uncle Fester
Using half wave rectification produces the earliest used forms of pulse power in model railroading. It is easy to generate.
Using half wave pulses for power results in visibly improved slow speed running, limits you to about half the top speed, and generates about 4 times the heat in the motor compared to full wave rectification. This may or may not be dangerous to the motor depending on the type of motor and how it heavily it is loaded (includes both the number of cars and locomotive drive friction) the type of loading on it. The motor will also have a tendency to have a low frequency "growl" compared to operation on full wave rectification. Normally there is a switch installed to switch between full and half wave rectification.
In an ideal world, you would be monitoring the current of each locomotive running on your layout. And you would know the ratings for each motor, and what it's normal current draw and operating temperature was. Then you would know when you were approaching dangerous current or heat levels. Since you likely don't have any of the above, I would recommend not running on pulse power unattended and not running on pulse power for hours on end.
What concerns me more - and I mentioned this in your last thread - is your use of the Type V to control 4 sections of track without apparently understanding the appropriate precautions. Without knowing your layout configuration and wiring I cannot give specifics, but at the very least I would be fusing (or circuit breakers) each of the 4 legs to 1 or 2 amps.
my thoughts, your choices
Fred W
I am fusing each output at 3 amps. and I lowered the max. voltage to 12 volts.
thanx for the input Uncle fester
I took your advice, when I added the half wave rectifiers to the outputs of the lionel controller while leaving the full wave system in place. I also added a double pole double pole switch, to allow me to switch between the two systems. this arangement gives me great low speed control, and normal high speed control. By the way, each output does have both ammeters and volt meters installed, allowing me to constantly monitor the performance of my equipment. corbyn, my grandson also knows that 10 volts is the speed limit for all trains and to watch the ammeters for signs of problems.
thanx again for the input Uncle Fester
I'm very glad to hear it's working well for you. It sounds like you and your grandson are having fun together. Enjoy!