IP Library › Granted Patent US 10,917,029
Granted Patent B2
US 10,917,029 · App. 16/594,976 · Granted Feb 9, 2021

Pi source inverter-converter for hybrid electric vehicles

Inventor: Ping Zhu (Auburn Hills, MI)
Assignee: Vitesco Technologies USA, LLC
H02P23/04H03H7/0115B60K6/26B60K2006/268B60L50/60B60L2210/10B60Y2200/91B60Y2200/92B60Y2400/61
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Quick Facts
Patent No.
US 10,917,029
App. No.
16/594,976
Granted
Feb 9, 2021
Kind
B2
Abstract

A system for reducing a resonant oscillation on a direct current bus is disclosed. The system includes a battery, a first capacitor connected in parallel with the battery, and an inductor connected in series with the first capacitor. The system also includes a first element connected in series with the inductor, a second element connected in parallel with the inductor and the first element, and a second capacitor connected in series with the first element. The system also includes an electric machine connected to the second capacitor. During a re-generation mode for charging the battery, a re-generation current flows from the electric machine to the battery, passing through the first element and the inductor and bypassing the second element. Additionally, during a motor mode, a motor current flows from the battery to the electric machine, passing through the second element and bypassing the first element and the inductor.

Claims (26)

1. A system for reducing a resonant oscillation on a direct current bus, the system comprising:

a battery;

a first capacitor connected in parallel with the battery;

an inductor connected in series with the first capacitor;

a first element connected in series with the inductor;

a second element connected in parallel with the inductor and the first element;

a second capacitor connected in series with the first element; and

an electric machine connected to the second capacitor;

wherein:

during a re-generation mode for charging the battery, a re-generation current flows from the electric machine to the battery, passing through the first element and the inductor and bypassing the second element; and

during a motor mode, a motor current flows from the battery to the electric machine, passing through the second element and bypassing the first element and the inductor.

2. The system of claim 1 , wherein the first element is a MOSFET.

3. The system of claim 1 , wherein the second element is a MOSFET.

4. The system of claim 1 , wherein the first capacitor and the inductor form an L-C filter.

5. The system of claim 1 , wherein during the re-generation mode for charging the battery, the re-generation current flows through the first capacitor and the inductor respectively.

6. The system of claim 1 , further comprising a power inverter/converter connected between the electric machine and the second capacitor.

7. The system of claim 6 , wherein the power inverter/converter comprises six MOSFETS each including a diode.

8. The system of claim 6 , wherein the power inverter/converter comprises six insulated-gate bipolar transistors (IGBT).

9. The system of claim 6 , wherein the power inverter/converter comprises a four quadrant DC-DC converter.

10. The system of claim 6 , wherein the power inverter/converter comprises a two quadrant DC-DC converter.

11. The system of claim 6 , wherein:

during the motor mode, the power inverter/converter includes an inverter from DC to 3-phase AC sinusoidal; and

during the re-generation mode, the power inverter/converter includes a converter from 3-phase AC sinusoidal to DC.

12. The system of claim 1 , wherein the electric machine is a starter-generator.

13. The system of claim 1 , wherein the electric machine is a bi-directional load.

14. The system of claim 1 , wherein the electric machine is an on-board charger.