Motor Vehicle

• US 20080073132A1
• Filed: 09/21/2007
• Published: 03/27/2008
• Est. Priority Date: 09/22/2006
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Gebert, Juergen, Oesterreicher, Florian, KAINDL, Markus, Goetz, Georg
• Granted Patent: US 7,779,942 B2
• Time in Patent Office: Days
• US Class Current: 180/65.2
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 58/30 for monitoring or controlling fuel cells
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

A motor vehicle (KFZ) including an electric power source (EQ) for providing DC current, a converter (U) for converting the DC current into three-phase AC current of identical phase angle or polyphase current as a function of the vehicle operating state, and an electric machine (EM), to which the current provided by the converter is fed, is provided.

Claims

1. A motor vehicle comprising:

an electric power source for providing DC current;

a converter for converting the DC current into three-phase AC current of identical phase angle or polyphase current as a function of the vehicle operating state;

an electric machine, to which the current provided by the converter is fed; and

a control unit, which is set up to control the converter in such a way that the converter automatically provides three-phase AC current of identical phase angle or polyphase current as a function of a current vehicle operating state.

2. The motor vehicle according to claim 1, further comprising a detection unit for detecting the current vehicle operating state, which is signaled to the control unit.

3. The motor vehicle according to claim 1, further comprising an input interface for inputting the current vehicle operating state, which is signaled to the control unit.

4. The motor vehicle according to claim 1, wherein the power source comprises a super capacitor.

5. The motor vehicle according to claim 1, wherein the detection unit comprises an acceleration sensor, and

the detection unit is set up in such way that it may detect an accident vehicle operating state.

6. The motor vehicle according to claim 3, wherein the input interface is set up in such way that a repair vehicle operating state may be input via the input interface.

7. The motor vehicle according to claim 1, wherein the motor vehicle is drivable by the electric machine or the power source is chargeable by the power of the motor vehicle or the power provided by an internal combustion engine of the motor vehicle.

8. The motor vehicle according to claim 1, wherein the power source has at least one of the following properties:

discharge time of the power source is less than 20 seconds;

power content of the power source is greater than 100 watt-hours; and

the rated voltage of the power source is greater than 60 volts.

9. The motor vehicle according to claim 1, further comprising:

a control unit, which is set up to control the converter in such a way that the converter automatically provides three-phase AC current of identical phase angle or polyphase current as a function of the state of a hydrogen tank,

wherein the power source comprises a fuel cell fed from the hydrogen tank.

10. The motor vehicle according to claim 2, further comprising an input interface for inputting the current vehicle operating state, which is signaled to the control unit.

11. The motor vehicle according to claim 2, wherein the power source comprises a super capacitor.

12. The motor vehicle according to claim 3, wherein the power source comprises a super capacitor.

13. The motor vehicle according to claim 2, wherein the detection unit comprises an acceleration sensor, and

the detection unit is set up in such way that it may detect an accident vehicle operating state.

14. The motor vehicle according to claim 3, wherein the detection unit comprises an acceleration sensor, and

the detection unit is set up in such way that it may detect an accident vehicle operating state.

15. The motor vehicle according to claim 2, wherein the motor vehicle is drivable by the electric machine or the power source is chargeable by the power of the motor vehicle or the power provided by an internal combustion engine of the motor vehicle.

16. The motor vehicle according to claim 3, wherein the motor vehicle is drivable by the electric machine or the power source is chargeable by the power of the motor vehicle or the power provided by an internal combustion engine of the motor vehicle.

17. The motor vehicle according to claim 2, wherein the power source has at least one of the following properties:

discharge time of the power source is less than 20 seconds;

power content of the power source is greater than 100 watt-hours; and

the rated voltage of the power source is greater than 60 volts.

18. The motor vehicle according to claim 3, wherein the power source has at least one of the following properties:

discharge time of the power source is less than 20 seconds;

power content of the power source is greater than 100 watt-hours; and

the rated voltage of the power source is greater than 60 volts.

19. The motor vehicle according to claim 2, further comprising:

a control unit, which is set up to control the converter in such a way that the converter automatically provides three-phase AC current of identical phase angle or polyphase current as a function of the state of a hydrogen tank,

wherein the power source comprises a fuel cell fed from the hydrogen tank.

20. A method for controlling a converter of a motor vehicle, comprising the acts of:

providing DC current to the converter;

automatically converting the DC current into three-phase AC current of identical phase angle or polyphase current as a function of a vehicle operating state; and

outputting the three-phase AC current of identical phase angle or the polyphase current as a function of the vehicle operating state from the converter to an electric machine.