High current capacity rectifier package
View Patent ↗Disclosed is a dynamoelectric machine having improved heat dissipation capabilities. The dynamoelectric machine includes a three-phase stator winding with a rectifier assembly electrically connected to the stator winding. The rectifier assembly includes an end frame having at least one negative diode contained therein and a positive heat sink which has at least one positive diode disposed therein. Connecting the negative diodes and positive diodes is a terminal assembly. The terminal assembly includes one or more electrically conductive and heat dissipative straps. The straps electrically connect one or more negative diodes and one or more positive diodes. Also disclosed is a method for dissipating heat from a rectifier of a dynamoelectric machine.
1. A rectifier for a dynamoelectric machine comprising:
an end frame having at least one negative diode disposed therein, the at least one negative diode electrically connectable to a stator winding of the dynamoelectric machine;
a positive heat sink having at least one positive diode disposed therein, the at least one positive diode electrically connectable the stator winding of the dynamoelectric machine; and
a terminal assembly including:
a plurality of bosses, one boss of the plurality of bosses disposed at each negative diode of the at least one negative diode and each positive diode of the at least one positive diode; and
at least two electrically conductive and heat dissipative straps, the straps extending between the plurality of bosses, electrically connecting one or more negative diodes and one or more positive diodes, the straps substantially bare between bosses of the plurality of bosses.
2. The rectifier of claim 1 wherein the at least two straps are disposed in a configuration such that each positive diode and each negative diode are electrically connected to at least two straps.
3. The rectifier of claim 1 wherein the end frame includes at least one vent slot to increase a flow of cooling air through the rectifier.
4. The rectifier of claim 1 wherein the end frame includes an outer wall disposed at least partially perimetrically around and extending axially from the end frame to increase a cooling capacity of the end frame.
5. The rectifier of claim 4 wherein the positive heat sink includes a plurality of fins extending from a perimeter of the positive heat sink defining pathways between the positive heat sink and the outer wall of the end frame, the pathways configured to allow cooling air to flow therethrough.
6. A rectifier for a dynamoelectric machine comprising:
an end frame having at least one negative diode disposed therein, the at least one negative diode electrically connectable to a stator winding of the dynamoelectric machine;
a positive heat sink having at least one positive diode disposed therein, the at least one positive diode electrically connectable the stator winding of the dynamoelectric machine; and
a terminal assembly including:
a plurality of bosses, one boss of the plurality of bosses disposed at each negative diode of the at least one negative diode and each positive diode of the at least one positive diode; and
one or more electrically conductive and heat dissipative straps configured to facilitate uninterrupted welded connection to substantially uninsulated portions of one or more negative diodes and one or more positive diodes, the straps configured as substantially bare and extending between bosses of the plurality of bosses.
7. The rectifier of claim 6 wherein the one or more straps are disposed in a configuration such that each positive diode and each negative diode are electrically connected to said plurality of straps.
8. The rectifier of claim 6 wherein the end frame includes at least one vent slot to increase a flow of cooling air through the rectifier.
9. The rectifier of claim 6 wherein the end frame includes an outer wall disposed at least partially perimetrically around and extending axially from the end frame to increase a cooling capacity of the end frame.
10. The rectifier of claim 9 wherein the positive heat sink includes a plurality of fins extending from a perimeter of the positive heat sink defining pathways between the positive heat sink and the outer wall of the end frame, the pathways configured to allow cooling air to flow therethrough.
11. A rectifier for a dynamoelectric machine comprising:
an end frame having at least one negative diode disposed therein, the at least one negative diode electrically connectable to a stator winding of the dynamoelectric machine;
a positive heat sink having at least one positive diode disposed therein, the at least one positive diode electrically connectable the stator winding of the dynamoelectric machine; and
a terminal assembly including one or more substantially bare electrically conductive and heat dissipative straps, the straps electrically connecting one or more negative diodes and one or more positive diodes.
12. The rectifier of claim 11 wherein the one or more straps are disposed in a configuration such that each positive diode and each negative diode are electrically connected to said plurality of straps.
13. The rectifier of claim 11 wherein the end frame includes six negative diodes and the positive heat sink includes six positive diodes.
14. The rectifier of claim 11 wherein two positive diodes and two negative diodes are electrically connected to each phase of the stator winding.
15. The rectifier of claim 14 wherein the one or more straps connect the two positive diodes and two negative diodes electrically connected to each phase of the stator winding in a parallel configuration.
16. The rectifier of claim 11 wherein the end frame includes at least one vent slot to increase a flow of cooling air through the rectifier.
17. The rectifier of claim 11 wherein the end frame includes an outer wall disposed at least partially perimetrically around and extending axially from the end frame to increase a cooling capacity of the end frame.
18. The rectifier of claim 17 wherein the positive heat sink includes a plurality of fins extending from a perimeter of the positive heat sink defining pathways between the positive heat sink and the outer wall of the end frame, the pathways configured to allow cooling air to flow therethrough.
19. A method for dissipating heat from a rectifier of a dynamoelectric machine, the method comprising:
conducting heat into an end frame from at least one negative diode disposed therein, the at least one negative diode electrically connectable to a stator winding of the dynamoelectric machine;
conducting heat into a positive heat sink from at least one positive diode disposed therein, the at least one positive diode electrically connectable to said stator winding of the dynamoelectric machine;
further conducting heat from the at least one negative diode and at least one positive diode into one or more substantially bare electrically conductive and heat dissipative straps of a terminal assembly, the straps electrically connecting one or more negative diodes and one or more positive diodes;
urging cooling air through the rectifier to radiate heat from the end frame, the positive heat sink, and/or the straps.
20. The method of claim 19 wherein the straps are disposed in a configuration such that each positive diode and each negative diode are electrically connected to a plurality of straps.
21. The method of claim 19 wherein the end frame includes at least one vent slot to increase a flow of cooling air through the rectifier.
22. The method of claim 19 wherein the end frame includes an outer wall disposed at least partially perimetrically around and extending axially from the end frame to increase a cooling capacity of the end frame.
23. The method of claim 22 wherein the positive heat sink includes a plurality of fins extending from a perimeter of the positive heat sink defining pathways between the positive heat sink and the outer wall of the end frame, the pathways configured to allow cooling air to flow therethrough.