Precision switching power amplifier and uninterruptible power system

• US 6,385,056 B1
• Filed: 09/29/2000
• Issued: 05/07/2002
• Est. Priority Date: 09/29/2000
• Status: Expired due to Fees

• Current Assignee: Jeff Gucyski
• Original Assignee: Jeff Gucyski
• Inventors: Gucyski, Jeff
• Primary Examiner(s): NGUYEN, MATTHEW VAN
• Application Number:
  US09/676,793
• Time in Patent Office: 585 Days
• Field of Search: 363/15, 363/16, 363/55, 363/56.01, 363/95, 363/97, 363/131
• US Class Current: 363/15
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02M 7/48 using discharge tubes with control electrode or semiconductor devices with control electrode
• CPC Class Codes: H02M 7/4807 having a high frequency intermediate AC stage
• CPC Class Codes: H02M 7/538 in a push-pull configuration H02M7/5375 takes precedence ; with oscillating arrangements H02M7/53832, H02M7/53846
• CPC Class Codes: H02M 7/5387 in a bridge configuration

Abstract

This instantaneously interruptible power source (I²PS) produces a precise AC output voltage. The I²PS can be built using only 7 power components, including an output capacitor. Moreover, currents applied thereto are unidirectional and independently developed. In the conventional switching power amplifier or uninterruptible power source, an output inductor continuously delivers a current to an output capacitor. A precise correction is simply impossible since, at the end of every switching cycle, the correction is either insufficient or continues while no longer required. This includes even most sophisticated class-D amplifiers. By contrast, the I²PS can instantaneously interrupt the correction and become idle. Without transformation, the output voltage can exceed supply voltages. An inductive block comprises at least one inductor and/or transformer for providing a return voltage. A switch or switches selectively apply a DC supply voltage or voltages to the inductive block. A rectifier limits the return,voltage, e.g. to one supply voltage. Another switch or switches can be used for selectively applying the output voltage to the inductive block. The output capacitor provides the output voltage of the I²PS.

Claims

1. Unidirectional or bi-directional switching power apparatus converting a supply voltage or voltages into an AC output voltage comprising:

a converter means for converting the supply voltage or voltages into a primary current;

a transformer means for providing a secondary current in response to the primary current;

a capacitive means for providing the AC output voltage; and

a switching means for selectively applying the secondary current to the capacitive means.

2. Switching power apparatus of claim 1 wherein the converter means includes a second switching means for selectively applying the supply voltage or voltages to the transformer means.

3. Switching power apparatus of claim 1 wherein the converter means includes a rectifying means for limiting a voltage applied to the transformer means.

4. Switching power apparatus of claim 1 wherein the converter means includes an inductive means for attaining the primary current.

5. Switching power apparatus of claim 4 wherein the inductive means provides a return voltage or voltages, and

further wherein the converter means includes a rectifying means for limiting the return voltage or voltages.

6. Switching power apparatus of claim 1 further including a second capacitive means coupled in series with the transformer means for storing an intermediate DC voltage.

7. Switching power apparatus of claim 1 further including:

a comparator means for comparing a reference voltage against the AC output voltage and providing a comparator signal; and

a means for controlling the switching means or the converter means and the switching means in response to the comparator signal.

8. Unidirectional or bi-directional switching power apparatus converting a supply voltage or voltages into an AC output voltage comprising:

an inductive means for providing a return voltage or voltages;

a first switching means for selectively applying the supply voltage or voltages to the inductive means;

a rectifying means for limiting the return voltage or voltages;

a capacitive means for providing the AC output voltage; and

a second switching means for selectively applying the AC output voltage to the inductive means.

9. Switching power apparatus of claim 8 further including a second capacitive means coupled in series with the inductive means for storing an intermediate DC voltage.

10. Switching power apparatus of claim 8 further including a second capacitive means coupled in series with first said capacitive means for storing an intermediate DC voltage.

11. Switching power apparatus of claim 8 further including:

a comparator means for comparing a reference voltage against the AC output voltage and providing a comparator signal; and

a means for controlling the second switching means or the first and second switching means in response to the comparator signal.

12. Unidirectional or bi-directional switching power apparatus converting a supply voltage or voltages into an AC output voltage comprising:

a converter means for converting the supply voltage or voltages into a primary voltage;

a transformer means having a primary winding with the primary voltage applied thereto, and a secondary winding with a tap for providing a secondary voltage in response to the primary voltage;

an inductive means coupled to the tap for attaining a current and providing a return voltage or voltages;

a rectifying means for limiting the return voltage or voltages;

a capacitive means for providing the AC output voltage; and

a switching means coupled to the secondary winding for selectively applying the current to the capacitive means.

13. Switching power apparatus of claim 12 wherein the inductive means includes:

a first inductive means for attaining the current; and

a second inductive means coupled to the first inductive means for providing the return voltage or voltages.

14. Switching power apparatus of claim 12 wherein the switching means includes a second rectifying means coupled to the secondary winding for rectifying the secondary voltage.

15. Switching power apparatus of claim 12 further including:

a comparator means for comparing a reference voltage against the AC output voltage and providing a comparator signal; and

a means for controlling the switching means or the converter means and the switching means in response to the comparator signal.

16. Unidirectional or bi-directional switching power apparatus converting a supply voltage or voltages of a voltage source into an AC output voltage comprising:

an inductive means for attaining a current and providing a return voltage or voltages;

a switching means for selectively applying the current to the voltage source;

a rectifying means for limiting the return voltage or voltages when the current is substantially equal to zero; and

a capacitive means for providing the AC output voltage in response to the current.

17. Switching power apparatus of claim 16 wherein the inductive means includes:

a first inductive means for attaining the current; and

a second inductive means coupled to the first inductive means for providing the return voltage or voltages.

18. Switching power apparatus of claim 16 wherein the rectifying means provides a return current or currents to the voltage source and includes:

a second capacitive means for storing a holdup voltage or voltages; and

a converter means for converting the holdup voltage or voltages into the return current or currents.

19. Switching power apparatus of claim 16 further including a second capacitive means coupled in series with the inductive means for storing an intermediate DC voltage.

20. Switching power apparatus of claim 16 further including:

a comparator means for comparing a reference voltage against the AC output voltage and providing a comparator signal; and

a means for controlling the switching means in response to the comparator signal.