Resistor plate assembly with contact bands
An assembly comprises a resistor plate for a rotating rectifier assembly (RRA). A shaft bore is defined through the resistor plate for passage of a shaft of an electrical machine, and the resistor plate defines a main annular body around the shaft bore. A first protrusion extends radially outward from the main annular body, so that a first pin bore extends through the first protrusion. At least one contact band is seated in a the pin bore of the resistor plate for mounting a direct current (DC) pin to the resistor plate.
1. An assembly comprising:
a resistor plate for a rotating rectifier assembly (RRA), the resistor plate including:
a shaft bore is defined through the resistor plate for passage of a shaft of an electrical machine;
a main annular body around the shaft bore;
a first protrusion extending radially outward from the main annular body, wherein a first pin bore extends through the first protrusion;
a second protrusion extending radially outward from the main annular body, wherein a second pin bore extends through the second protrusion;
at least one contact band seated in the first pin bore of first protrusion of the resistor plate for mounting a direct current (DC) pin to the resistor plate, wherein a respective joining interface formed between each of the at least one contact band and the resistor plate is free of braze; and
at least one contact band seated in a the second pin bore of the second protrusion for mounting a direct current (DC) pin to the resistor plate, wherein a respective joining interface formed between each of the at least one contact band and the resistor plate is free of braze;
a first DC pin seated in the at least one contact band of the first protrusion; and
a second DC pin seated in the at least one contact band of the second protrusion.
2. The assembly as recited in claim 1 , wherein each respective joining interface of the at least one contact bands is an interference fit.
3. The assembly as recited in claim 1 , wherein the at least one contact band includes a first contact band and a second contact band wherein the first contact band is axially stacked with the second contact band within the pin bore.
4. The assembly as recited in claim 1 , wherein the resistor plate is of Aluminum.
5. The assembly as recited in claim 1 , wherein the at least one contact band is of a metallic material.
6. The assembly as recited in claim 1 , further comprising at least one coolant channel defined in the main annular body of the resistor plate.
7. The assembly as recited in claim 1 , wherein the resistor plate is assembled into the RRA of a variable frequency generator (VFG), wherein the first and second DC pins electrically connect between diodes and a field winding of the VFG for rectifying alternating current (AC) to DC in the RRA.
8. The assembly as recited in claim 7 , further comprising a resistor cover stacked axially with the resistor plate.
9. The assembly as recited in claim 8 , further comprising a resistor support assembly stacked axially with the resistor plate and the resistor cover, wherein the resistor plate is sandwiched between the resistor cover and the resistor support assembly.
10. The assembly as recited in claim 9 , wherein the resistor cover and the resistor support assembly further include at least one pin bore defined therein for accommodating another DC pin.
11. The assembly as recited in claim 7 , wherein the contact bands are spring type contact bands.