Connector block with parallel electrical connection
An external connector block that can be positioned over multiple standard-sized power supply terminals that are secured to the housing of, e.g., a compressor is disclosed. The connector block includes an electrically conductive bridge connecting respective pins of the terminals in parallel. By connecting the terminals in parallel, the connector block increases the maximum allowable operating current of a terminal connection, while still utilizing standard-sized power terminal feed-throughs. As such, the connector block of the present disclosure may enable higher power rated applications without requiring a new power supply terminal design.
1. An external connector block for connecting a first terminal and a second terminal of an electric machine to an external power source, comprising:
a nonconductive body having a longitudinal axis, the nonconductive body including:
a support having a first side and a second side,
a first boss disposed on the first side of the support and adapted to engage the first terminal, the first boss and the support defining a first set of N holes extending through the first boss and the support to the second side and adapted to receive a first set of N current conducting pins of the first terminal, N being an integer greater than two,
a second boss disposed on the first side of the support and adapted to engage the second terminal, the second boss longitudinally spaced apart from the first boss, the second boss and the support defining a second set of N holes extending through the second boss and the support to the second side and adapted to receive a second set of N current conducting pins of the second terminal, and
walls extending from the second side and defining N longitudinally extending channels separated from each other by the walls; and
N conductive connectors coupled to the second side of the nonconductive body, each extending longitudinally within a respective one of the channels and adapted to connect a first pin of the first set of current conducting pins to a respective second pin of the second set of current conducting pins via a first hole of the first set of holes and a second hole of the second set of holes;
wherein one of the first boss and the second boss is adapted to couple to a fastener located on the second side used to secure the connector block to one of the first terminal and the second terminal; and
wherein at least one of the conductive connectors is made from a metal member.
2. The connector block of claim 1 , wherein at least one of the conductive connectors is at least partially embedded in the nonconductive body, thereby coupling the at least one conductive connector to the nonconductive body.
3. The connector block of claim 1 , wherein the conductive connectors are adapted to connect to leads of the external power source at locations separate from the locations where the conductive connectors connect to the first set of current conducting pins and the second set of current conducting pins.
4. The connector block of claim 1 , wherein the nonconductive body is made from a polymeric material.
5. The connector block of claim 1 , further comprising:
a threaded insert for receiving a fastener used to connect one of the N conductive connectors to one of the first pin and the second pin,
wherein the threaded insert is coupled to the second side and extends at least partially through one of the first boss and the second boss, and
wherein the threaded insert overlaps the one conductive connector.
6. An apparatus, comprising:
an electric machine disposed within a housing;
a first terminal for supplying power to the electric machine, the first terminal extending through the housing and having a first set of N current conducting pins, N being an integer greater than two;
a second terminal for supplying power to the electric machine, the second terminal extending through the housing and having a second set of N current conducting pins; and
a connector block for electrically connecting leads of an external power source to the first terminal and the second terminal on an exterior of the housing, the connector block including:
a nonconductive body having a first set of N holes extending through the nonconductive body to a second side and receiving the first set of current conducting pins, and a second set of N holes extending through the nonconductive body to the second side and receiving the second set of current conducting pins; and
N conductive connectors, each having portions positioned on the second side and extending within a respective one of the channels and connecting a first pin of the first set of current conducting pins to a respective second pin of the second set of current conducting pins via a first hole of the first set of holes and a second hole of the second set of holes;
2N conductive coupling members, each disposed within one of the first set of holes and the second set of holes and overlapping one of the conductive connectors on the second side; and
wherein the conductive connectors are made from a metal member.
7. The apparatus of claim 6 , each conductive coupling member connected on a first end with one of the first set of current conducting pins and the second set of current conducting pins and on an opposite second end to a respective one of the conductive connectors.
8. The apparatus of claim 7 , further comprising 2N threaded inserts for receiving a fastener used to connect the conductive coupling members to the conductive connectors, each of the threaded inserts coupled to the second side and extending at least partially through the nonconductive body in a lateral direction, each of the threaded inserts overlapping a respective one of the conductive connectors.
9. The apparatus of claim 7 , wherein the conductive coupling members are resistance welded to the current conducting pins.
10. The apparatus of claim 6 , wherein the conductive connectors are at least partially embedded in the nonconductive body, thereby coupling the conductive connectors to the nonconductive body.
11. The apparatus of claim 6 , wherein the conductive connectors are adapted to connect to leads of the external power source at locations separate from the locations where the conductive connectors connect to the first set of current conducting pins and the second set of current conducting pins.
12. The apparatus of claim 6 , wherein the nonconductive body is made from a polymeric material.
13. The apparatus of claim 6 , wherein the electric machine is a refrigeration compressor.
14. The apparatus of claim 6 , wherein the nonconductive body further comprises a plurality of walls extending from the second side, the walls defining N longitudinally extending channels separated from each other by the walls; and
wherein each conductive connector extends along a respective one of the channels.