DC Voltage Converting Device

• US 20100244561A1
• Filed: 06/09/2010
• Published: 09/30/2010
• Est. Priority Date: 09/19/2001
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Cameron International Corporation (Schlumberger NV)
• Inventors: Biester, Klaus, Kunow, Peter
• Granted Patent: US 8,106,538 B2
• Time in Patent Office: Days
• US Class Current: 307/11
• CPC Class Codes: H04M 1/247 Telephone sets including user guidance or feature selection means facilitating their use user interfaces specially adapted for cordless or mobile telephones H04M1/724
• CPC Class Codes: H04M 1/663 Preventing unauthorised calls to a telephone set
• CPC Class Codes: H04M 1/72451 according to schedules, e.g. using calendar applications
• CPC Class Codes: H04M 19/042 with variable loudness of the ringing tone, e.g. variable envelope or amplitude of ring signal

Abstract

A DC voltage converting device is on the output side connected to a DC voltage source and, on the output side, supplies a converted DC voltage to at least one electrical consumer via a cable connection. To improve such a DC voltage converting device in that also with high DC voltages on the input side, a conversion into another DC voltage is possible without any special constructional efforts and high costs while complicated cooling means or the like, are avoided at the same time, the DC voltage converting device comprises a plurality of DC voltage converting units of which each is serially connected to the DC voltage source on the input side and connected in parallel with the cable connection on the output side for supplying the converted DC voltage.

Claims

1. A DC voltage converting device which supplies a converted DC voltage to at least one electrical consumer via a cable connection,

the DC voltage converting device comprising:

a plurality of DC voltage converting units of which each is serially connected to a DC voltage source on an input side and connected in parallel with the cable connection on an output side for supplying the converted DC voltage to the at least one electrical consumer.

2. A DC voltage converting device according to claim 1, wherein a DC voltage from the DC voltage source applied on the input side of the DC voltage converting units is in the order of about 1 kV to 10 kV.

3. A DC voltage converting device according to claim 1 wherein the cable connection comprises a coaxial cable.

4. A DC voltage converting device according to claim 1 wherein the DC voltage converting device further comprises a filter on the input side of the DC voltage converting units.

5. A DC voltage converting device according to claim 1 wherein each DC voltage converting unit is designed as a clocked switch mode power supply.

6. A DC voltage converting device according to claim 5 wherein the switch mode power supply is primarily clocked.

7. A DC voltage converting device according to claim 5 wherein the switch mode power supply is designed as a push-pull converter.

8. A DC voltage converting device according to claim 5 wherein the switch mode power supply is designed as a full-bridge push-pull converter.

9. A DC voltage converting device according to claim 5 wherein the switch mode power supply comprises one or more switching transistors selected from the group consisting of power MOSFET transistors and power BIMOSFET transistors.

10. A DC voltage converting device according to claim 9 wherein the one or more switching transistors are clocked in push-pull fashion at a clock ratio of 1:

1.

11. A DC voltage converting device according to claim 5 wherein the switch mode power supplies of the DC voltage converting device are clocked in synchronism.

12. A DC voltage converting device according to claim 5 wherein the switch mode power supplies of the DC voltage converting device are clocked in phase-shifted fashion relative to one another.

13. A DC voltage converting device according to claim 12 wherein a phase shift associated with a clocking of neighboring switch mode power supplies comprises a phase shift of 1/n if n is the number of the switch mode power supplies of the DC voltage converting device.

14. A DC voltage converting device according to claim 4 wherein a data coupler/decoupler is arranged upsteam of the filter in the direction if the DC voltage source.

15. A DC voltage converting device according to claim 14 further comprising a controller that is assigned to one or more components selected from the group consisting of the DC voltage converting units, the filter, and the data coupler/decoupler.

16. A DC voltage converting device according to claim 5 wherein a clock frequency of the switch mode power supply is within the range of 50 kHz to 300 kHz.

17. A DC voltage converting device according to claim 9 wherein an output voltage of each switch mode power supply is readjustable in case of failure of another switch mode power supply of the DC voltage converting device.

18. A DC voltage converting device according to claim 17 wherein a duty factor of the one or more switching transistors is variable for readjusting the output voltage of a switch mode power supply.

19. A DC voltage converting device according to claim 9 wherein the switch mode power supply comprises a pulse modulator that is operable to output a sequence of variable pulses for clocking the one or more switching transistors.

20-41. -41. (canceled)

42. A system for supplying power to a remote electrical device, the system comprising:

a DC source;

a plurality of DC voltage converters each having an input serially connected to the DC source and each having an output connected in parallel to the remote electrical device via a conductor,

wherein the length of the conductor is at least two kilometers.

43. A system for supply power to an electrical device, comprising:

a DC source; and

a plurality of DC voltage converters each having an input serially connected to the DC source and each having an output connected in parallel to the electrical device via a conductor,

wherein at least some of the DC voltage converters are configured to provide different output voltages.

44. The system of claim 43 wherein at least some of the DC voltage converters have different constructions for providing the different output voltages.