I should preface this question indicating I'm a house power storage and generation system enthusiast, not an electrical engineer.
I am building a Remote Rectifier for a small case P style 12V 120A engine driven alternator that will have external voltage regulation. The reason being the alternator is located in an area of high heat and under a high constant load so wish to reduce the heat of the alternator so it doesn't experience as much output loss or burn up. The existing internal rectifier will be removed and the 3 phase AC taken off the alternators stator via heavy gauge wires (say 6g) to the Remote Rectifier. It will have a heat sink and a fan. The alternators voltage regulators power source will go via thermal switch on the Remote Rectifier's alloy case in the event the fan malfunctioned and the rectifier overheated thus causing the regulator to switch off the alternator. Alternator output should be in the order of 100A hot with this modification so not to over stress the windings.
My knowledge of bridge rectifiers in this application is only limited to knowing they are taking 3 phase AC and via 3 sets of diodes converting it to DC and their DC current capacity to exceed that of the alternator to allow some headroom. I assume any excess current capacity of the rectifier will simply mean it will operate at a cooler temperature? I have attached a picture of the bridge rectifier I'm contemplating which indicates it is a full wave module with 3 sets of diodes and rated at 1600v and 300A.
My questions are;
1. Other than the current rating of 300A is there any other rectifier specification that I need to be concerned about for this application?
2. Am I correct in assuming the 3 phase AC cable run length even at 6g will need to be limited otherwise DC current output will be reduced?
As you can see this is my first post so I would be greatly appreciative of any guidance and assistance given.
Thanking you in anticipation.
I am building a Remote Rectifier for a small case P style 12V 120A engine driven alternator that will have external voltage regulation. The reason being the alternator is located in an area of high heat and under a high constant load so wish to reduce the heat of the alternator so it doesn't experience as much output loss or burn up. The existing internal rectifier will be removed and the 3 phase AC taken off the alternators stator via heavy gauge wires (say 6g) to the Remote Rectifier. It will have a heat sink and a fan. The alternators voltage regulators power source will go via thermal switch on the Remote Rectifier's alloy case in the event the fan malfunctioned and the rectifier overheated thus causing the regulator to switch off the alternator. Alternator output should be in the order of 100A hot with this modification so not to over stress the windings.
My knowledge of bridge rectifiers in this application is only limited to knowing they are taking 3 phase AC and via 3 sets of diodes converting it to DC and their DC current capacity to exceed that of the alternator to allow some headroom. I assume any excess current capacity of the rectifier will simply mean it will operate at a cooler temperature? I have attached a picture of the bridge rectifier I'm contemplating which indicates it is a full wave module with 3 sets of diodes and rated at 1600v and 300A.
My questions are;
1. Other than the current rating of 300A is there any other rectifier specification that I need to be concerned about for this application?
2. Am I correct in assuming the 3 phase AC cable run length even at 6g will need to be limited otherwise DC current output will be reduced?
As you can see this is my first post so I would be greatly appreciative of any guidance and assistance given.
Thanking you in anticipation.