Apparatus and methods for generating uninterruptible AC power signals

• US 5,642,002 A
• Filed: 10/29/1993
• Issued: 06/24/1997
• Est. Priority Date: 10/29/1993
• Status: Expired due to Term

• Current Assignee: Alpha Technologies Incorporated (EnerSys)
• Original Assignee: Alpha Technologies Incorporated (EnerSys)
• Inventors: Zediker, Gregory Scott, Sorenson, Donald C., Osterman, Thomas S., Mekanik, Fereydoun
• Primary Examiner(s): Wysocki, Jonathan
• Assistant Examiner(s): KAPLAN, JONATHAN STUART
• Application Number:
  US08/145,069
• Time in Patent Office: 1,334 Days
• Field of Search: 307/64, 307/65, 307/66, 307/43, 307/18-24, 307/85, 307/86, 307/87
• US Class Current: 307/64
• CPC Class Codes: H02J 9/062 for AC powered loads

Abstract

A broadband communications network having an uninterruptible power supply. The power supply has one input connection to AC line voltage and another input connected to a gas powered electrical generator. The power supply contains an uninterruptible power supply module having a controlled ferroresonant transformer and a battery. The power supply also contains a bypass module having a controlled ferroresonant transformer. Switches are provided to allow either of the inputs to be connected to either the UPS module or the bypass module for the generation of power signals for supplying power to the broadband communications network.

Claims

1. A communications network comprising:

a. means for generating at least one main stream of data; and

b. a network power node comprising;

i. means for receiving the at least one main stream of data and generating a plurality channels of data from the at least one main stream of data, and

ii. power supply means for providing electrical power to allow the transmission of the plurality of channels of data to end users, the power supply means further comprising;

(a) a primary source of electrical power,

(b) an alternate source of electrical power, the alternate source of electrical power comprising a motor driven electrical generator,

(c) an uninterruptible power supply module comprising a first ferroresonant transformer,

(d) a bypass module comprising a second ferroresonant transformer, and

(e) switch means for allowing the electrical power provided by the power supply means to be obtained through one of the following paths;

from the primary source through the uninterruptible power supply module, from the alternate source through the uninterruptible power supply module, from the primary source through the bypass module, and from the alternate source through the bypass module.

2. A communications network as recited in claim 1, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the bypass module; and

f. the second transfer switch is connected to the uninterruptible power supply module.

3. A communications network as recited in claim 1, in which the uninterruptible power supply module further comprises a battery forming a second alternate source of electrical power.

4. A communications network as recited in claim 1, further comprising an output select switch connected to a distribution network for distributing the plurality of channels of data to the end users, in which:

a. the ferroresonant transformer of the uninterruptible power supply module comprises a first winding, a second winding, and a third winding, where the first winding is connected to the switch means, the second winding is connected to a battery, and the third winding is connected to the output select switch; and

b. the ferroresonant transformer of the bypass module comprises a first bypass winding and a second bypass winding, where the first bypass winding is connected to the switch means and the second bypass winding is connected to the output select switch.

5. A communications network as recited in claim 4, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the first winding of the ferroresonant transformer of the bypass module; and

f. the second transfer switch is connected to the first winding of the ferroresonant transformer of the uninterruptible power supply module.

21. A communications network as recited in claim 1, in which:

a. the uninterruptible power supply module further comprises control means for providing ferroresonant regulation without core saturation; and

b. the bypass module further comprising control means for providing ferroresonant regulation without core saturation.

6. A power supply for use in a communications network comprising:

a. a primary source of electrical power;

b. an alternate source of electrical power, the alternate source of electrical power comprising a motor driven electrical generator;

c. an uninterruptible power supply module comprising a ferroresonant transformer;

d. a bypass module comprising a ferroresonant transformer; and

e. switch means for allowing the electrical power provided by the power supply means to be obtained from the primary source through the uninterruptible power supply module, from the alternate source through the uninterruptible power supply module, from the primary source through the bypass module, or from the alternate source through the bypass module.

7. A power supply as recited in claim 6, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the bypass module; and

f. the second transfer switch is connected to the uninterruptible power supply module.

8. A power supply as recited in claim 6, in which the uninterruptible power supply module further comprises a battery forming a second alternate source of electrical power.

9. A power supply as recited in claim 6, further comprising an output select switch, in which:

a. the ferroresonant transformer of the uninterruptible power supply module comprises a first winding, a second winding, and a third winding, where the first winding is connected to the switch means, the second winding is connected to a battery, and the third winding is connected to the output select switch; and

b. the ferroresonant transformer of the bypass module comprises a first bypass winding and a second bypass winding, where the first bypass winding is connected to the switch means and the second bypass winding is connected to the output select switch.

10. A power supply as recited in claim 9, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the first winding of the ferroresonant transformer of the bypass module; and

f. the second transfer switch is connected to the first winding of the ferroresonant transformer of the uninterruptible power supply module.

22. A communications network as recited in claim 6, in which:

a. the uninterruptible power supply module further comprises control means for providing ferroresonant regulation without core saturation; and

b. the bypass module further comprising control means for providing ferroresonant regulation without core saturation.

24. A power supply as recited in claim 6, further comprising an output select switch, in which:

a. in a first state, the output select switch connects the uninterruptible power supply module to a distribution portion of the communications network; and

b. in a second state, the output select switch connects the bypass module to the distribution portion of the communications network.

11. A power supply for use in a communications network comprising:

a. a primary source of electrical power;

b. a first alternate source of electrical power, the first alternate source of electrical power comprising a motor driven electrical generator;

c. an uninterruptible power supply module comprising a ferroresonant transformer and a second alternate source of electrical power comprising a battery;

d. a bypass module comprising a ferroresonant transformer, and

e. switch means for allowing the electrical power provided by the power supply means to be generated in a first mode from the primary source through the uninterruptible power supply module, in a second mode from the alternate source through the uninterruptible power supply module, in a third mode from the primary source through the bypass module, or in a fourth mode from the alternate source through the bypass module.

12. A power supply as recited in claim 11, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the bypass module; and

f. the second transfer switch is connected to the uninterruptible power supply module.

13. A power supply as recited in claim 11, further comprising an output select switch, in which:

a. in a first state, the output select switch connects the uninterruptible power supply module to a distribution portion of the communications network; and

b. in a second state, the output select switch connects the bypass module to the distribution portion of the communications network.

14. A power supply as recited in claim 13, in which:

a. in a first mode, the output select switch is in the first state, the fourth switch is open, the third switch is closed, and the second transfer switch transfers electrical power from the third switch to the uninterruptible power supply module;

b. in a second mode, the output select switch is in the first state, the third switch is open, the fourth switch is closed, and the second transfer switch transfers electrical power from the fourth switch to the uninterruptible power supply module;

c. in a third mode, the output select switch is in the second state, the second switch is open, the first switch is closed, and the first transfer switch transfers electrical power from the first switch to the bypass module; and

d. in a fourth mode, the output select switch is in the second state, the first switch is open, the second switch is closed, and the first transfer switch transfers electrical power from the second switch to the bypass module.

15. A power supply as recited in claim 11, further comprising an output select switch, in which:

a. the ferroresonant transformer of the uninterruptible power supply module comprises a first winding, a second winding, and a third winding, where the first winding is connected to the switch means, the second winding is connected to the battery, and the third winding is connected to the output select switch; and

b. the ferroresonant transformer of the bypass module comprises a first bypass winding and a second bypass winding, where the first bypass winding is connected to the switch means and the second bypass winding is connected to the output select switch.

16. A power supply as recited in claim 15, in which the switch means comprises a source switch array having first through fourth switches and first and second transfer switches, wherein

a. the first switch is connected between the primary source of electrical power and the first transfer switch;

b. the second switch is connected between the alternate source of electrical power and the first transfer switch;

c. the third switch is connected between the primary source of electrical power and the second transfer switch;

d. the fourth switch is connected between the alternate source of electrical power and the second transfer switch;

e. the first transfer switch is connected to the first winding of the ferroresonant transformer of the bypass module; and

f. the second transfer switch is connected to the first winding of the ferroresonant transformer of the uninterruptible power supply module.

17. A power supply as recited in claim 16, in which:

a. in a first state, the output select switch connects the third winding of ferroresonant transformer of the uninterruptible power supply module to a distribution portion of the communications network; and

b. in a second state, the output select switch connects the second winding of ferroresonant transformer of the bypass module to the distribution portion of the communications network.

18. A power supply as recited in claim 17, in which:

a. in a first mode, the output select switch is in the first state, the fourth switch is open, the third switch is closed, and the second transfer switch transfers electrical power from the third switch to the uninterruptible power supply module;

b. in a second mode, the output select switch is in the first state, the third switch is open, the fourth switch is closed, and the second transfer switch transfers electrical power from the fourth switch to the uninterruptible power supply module;

c. in a third mode, the output select switch is in the second state, the second switch is open, the first switch is closed, and the first transfer switch transfers electrical power from the first switch to the bypass module; and

d. in a fourth mode, the output select switch is in the second state, the first switch is open, the second switch is closed, and the first transfer switch transfers electrical power from the second switch to the bypass module.

23. A communications network as recited in claim 11, in which:

a. the uninterruptible power supply module further comprises control means for providing ferroresonant regulation without core saturation; and

b. the bypass module further comprising control means for providing ferroresonant regulation without core saturation.

19. A power supply for use in a communications network comprising:

a line inlet connected to utility AC line voltage;

a gas inlet connected to a source of natural gas;

an electrical generator for generating an alternate line signal based on the natural gas entering the gas inlet;

an uninterruptible power supply module comprising a first ferroresonant transformer, a battery, and a first controlled output circuit, the first ferroresonant transformer having a first winding, a second winding to which the battery is connected, and a third winding to which the first controlled output circuit is connected;

a bypass module comprising a second ferroresonant transformer and a second controlled output circuit, the second ferroresonant transformer having a first winding and a second winding to which the second controlled output circuit is connected;

a first transfer switch connected to the first winding of the second ferroresonant transformer;

a second transfer switch connected to the first winding of the first ferroresonant transformer;

an output select switch configured to allow, in a first state, the third winding of the first ferroresonant transformer to a distribution portion of the communications network or, in a second state, the second winding of the second ferroresonant transformer to be connected to the distribution portion of the communications network;

a first switch connected between the line inlet and the first transfer switch;

a second switch connected between the electrical generator and the first transfer switch;

a third switch connected between the line inlet and the second transfer switch; and

a fourth switch connected between the electrical generator and the second transfer switch;

wherein

in a first mode, the output select switch is in the first state, the fourth switch is open, the third switch is closed, and the second transfer switch transfers electrical power from the third switch to the uninterruptible power supply module;

in a second mode, the output select switch is in the first state, the third switch is open, the fourth switch is closed, and the second transfer switch transfers electrical power from the fourth switch to the uninterruptible power supply module;

in a third mode, the output select switch is in the second state, the second switch is open, the first switch is closed, and the first transfer switch transfers electrical power from the first switch to the bypass module; and

in a fourth mode, the output select switch is in the second state, the first switch is open, the second switch is closed, and the first transfer switch transfers electrical power from the second switch to the bypass module.

20. A communications network as recited in claim 19, in which:

a. the uninterruptible power supply module further comprises control means for providing ferroresonant regulation without core saturation; and

b. the bypass module further comprising control means for providing ferroresonant regulation without core saturation.