Motor Vehicle

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.

Description

DETAILED DESCRIPTION OF THE DRAWING

The FIGURE is restricted to the components necessary for understanding the present invention. Of course, the motor vehicle KFZ 100 may have all further components typical for a motor vehicle, in particular having electric drive or hybrid drive.

The FIGURE shows a power source EQ 110, which supplies a converter U 120 with DC current via two connection lines. In the normal vehicle operating states, in particular in normal electric-motor travel, the DC current is converted by the converter U 120 into a polyphase current, which is in turn fed to an electric machine EM 130 via three connection lines to drive it.

The converter U 120 is activated by a control unit STE 140, such as a program-controlled processor unit or an application-specific circuit.

If a critical vehicle operating state, such as an accident, is detected by a detection unit EE 150, such as a crash sensor, and signaled to the control unit, or a critical vehicle operating state, such as a vehicle repair, is input via an input interface ES 160, such as a key or a testing device, and signaled to the control unit, the converter U 120 is automatically activated in such a way that the DC current of the power source EQ 110 is converted into three-phase AC current of identical phase and fed via the three connection lines to the electric machine EM 130. The power source EQ 110 may thus be discharged in a controlled way.

After a discharge of the power source EQ 110 detected by a measuring device, for example, it may be displayed by the output of an optical or acoustic signal that the power source EQ 110 has been discharged, and that rescue personnel or mechanics are no longer subject to danger from the power source EQ 110.

The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.

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; anda 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; andthe 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; andthe 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; andthe 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; andoutputting 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.