Leadframe-based module DC bus design to reduce module inductance
First Claim
1. A DC Bus for use in a power module, comprising:
- a positive DC conductor bus plate;
a negative DC conductor bus plate placed parallel to said positive bus;
one or more positive leads connected to said positive bus, wherein said positive leads are connectable to a positive terminal of a power source;
one or more negative leads connected to said negative bus, wherein said negative leads are connectable to a ground terminal;
one or more positive connections fastenable from said positive bus to the high side of a power module;
one or more negative connections fastenable from said negative bus to the low side of a power module;
wherein said positive bus and said negative bus permit counter-flow of currents thereby canceling magnetic fields and their associated inductances; and
wherein said positive bus and said negative bus are located between the high side and the low side of the power module..
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Accused Products
Abstract
A DC bus for use in a power module has a positive DC conductor bus plate parallel with a negative DC conductor bus plate. One or more positive leads are connected to the positive bus and are connectable to a positive terminal of a power source. One or more negative leads are connected to the negative bus and are connectable to a negative terminal of a power source. The DC bus has one or more positive connections fastenable from the positive bus to the high side of a power module. The DC bus also has one or more negative connections fastenable from the negative bus to the low side of the power module. The positive bus and negative bus permit counter-flow of currents, thereby canceling magnetic fields and their associated inductances, and the positive and negative bus are connectable to the center portion of a power module.
63 Citations
20 Claims
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1. A DC Bus for use in a power module, comprising:
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a positive DC conductor bus plate;
a negative DC conductor bus plate placed parallel to said positive bus;
one or more positive leads connected to said positive bus, wherein said positive leads are connectable to a positive terminal of a power source;
one or more negative leads connected to said negative bus, wherein said negative leads are connectable to a ground terminal;
one or more positive connections fastenable from said positive bus to the high side of a power module;
one or more negative connections fastenable from said negative bus to the low side of a power module;
wherein said positive bus and said negative bus permit counter-flow of currents thereby canceling magnetic fields and their associated inductances; and
wherein said positive bus and said negative bus are located between the high side and the low side of the power module.. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14)
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9. A power module for reducing inductance, comprising:
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a lead frame for supporting the module and for providing interconnections to the motor and power source;
a substrate connected to said lead frame;
one or more pairs of high and low switches at the substrate level of the module;
a positive DC bus plate connected to the center portion of the power module;
a negative DC conductor bus plate placed parallel to said positive bus;
one or more positive leads connected to said positive bus, wherein said positive leads are connectable to a positive terminal of a power source;
one or more negative leads connected to said negative bus, wherein said negative leads are connectable to ground;
one or more positive connections fastenable from said positive bus to the high side of a power module;
one or more negative connections fastenable from said negative bus to the low side of a power module;
wherein said positive bus and said negative bus permit counter-flow of currents thereby canceling magnetic fields and their associated inductances; and
wherein said positive bus and said negative bus are located between the high side and the low side of the power module. - View Dependent Claims (10, 11, 12, 13, 15, 16, 18, 19, 20)
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17. A method of reducing inductance in a power module comprising:
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allowing DC current to flow symmetrically and directly to the switches of the module;
permiting counter-flow of electric currents, thereby canceling magnetic fields and their associated inductances; and
simultaneously positioning the positive and negative leads in close proximity to one another thereby canceling the magnetic fields and their associated inductance
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Specification