DC inverter having reduced switching loss and reduced voltage spikes
First Claim
1. An electrified vehicle propulsion system comprising:
- a DC link having a link capacitor and a link inductance;
a first converter bridge with a first phase leg having first upper and lower switching devices, each switching device having a respective gate loop;
a second converter bridge with a second phase leg having second upper and lower switching devices, each switching device having a respective gate loop;
a plurality of gate drivers providing gate drive signals to respective gate loops for turning the respective switching devices on and off;
a plurality of gate coils, each gate coil connected in series between a respective gate driver and a respective gate loop and each respectively inductively coupled to the link inductance.
1 Assignment
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Accused Products
Abstract
An electrified vehicle propulsion system uses current feedback to modify gate drive signals to suppress voltage spikes and increase switching efficiency. A DC link having a link capacitor and a link inductance is connected to first and second converters. A first converter bridge has a first phase leg with first upper and lower switching devices, each switching device having a respective gate loop. A second converter bridge has a second phase leg with second upper and lower switching devices, each switching device having a respective gate loop. A plurality of gate drivers provide gate drive signals to respective gate loops for turning the respective switching devices on and off. A plurality of gate coils are provided, wherein each gate coil is connected in series between a respective gate driver and a respective gate loop. Each gate coil is respectively inductively coupled to the link inductance.
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Citations
19 Claims
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1. An electrified vehicle propulsion system comprising:
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a DC link having a link capacitor and a link inductance; a first converter bridge with a first phase leg having first upper and lower switching devices, each switching device having a respective gate loop; a second converter bridge with a second phase leg having second upper and lower switching devices, each switching device having a respective gate loop; a plurality of gate drivers providing gate drive signals to respective gate loops for turning the respective switching devices on and off; a plurality of gate coils, each gate coil connected in series between a respective gate driver and a respective gate loop and each respectively inductively coupled to the link inductance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electric drive inverter, comprising:
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a DC link having a link inductance; a plurality of phase legs, each having upper and lower switching devices, each device having a gate loop; a plurality of gate drivers providing gate drive signals to respective gate loops; and a plurality of gate coils, each gate coil connected in series between a respective gate driver and a respective gate loop and each respectively inductively coupled to the link inductance. - View Dependent Claims (10, 11, 12, 13)
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14. An electric vehicle drive comprising:
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a DC power source; a DC link having a link capacitor and a link inductance; a variable voltage converter having upper and lower switching devices, each switching device having a respective gate loop; a motor inverter with a plurality of phase legs each having upper and lower switching devices, each switching device having a respective gate loop; a plurality of gate drivers providing gate drive signals to respective gate loops for turning the respective switching devices on and off; a plurality of gate coils, each gate coil connected in series between a respective gate driver and a respective gate loop and each respectively inductively coupled to the link inductance. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification