CASCADE POWER SYSTEM ARCHITECTURE
First Claim
1. A cascade power apparatus comprising:
- a. a non-isolated converter having a switching element, wherein the non-isolated converter receives a rectified power signal having an unregulated voltage and generates a regulated voltage;
b. an isolated converter coupled with the non-isolated converter for receiving the regulated voltage and generating a converted voltage;
c. a transformer coupled with the isolated converter for receiving the converted voltage and generating an output voltage; and
d. an internal controller coupled with an output of the isolated converter for receiving the converted voltage and generating a control signal for adjusting the switching element based on a feedback algorithm, wherein the feedback algorithm is independent of the output voltage.
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Abstract
A cascade power system comprises a non-isolated converter in a cascade configuration with an isolated converter and a controller that is coupled with the output of the isolated converter and the switching element of the non-isolated converter. The non-isolated converter steps-down the input voltage to a lower regulated voltage. The isolated converter converts the regulated voltage to a square wave signal that is output to a transformer and the controller. Thus, a the resulting feedback loop comprising the isolated converter, controller and non-isolated converter is completely independent from the output of the system. As a result, a feedback relation can be derived in the form of a feedback algorithm that can effectively regulate/adjust the output of the non-isolated converter and therefore the isolated converter output as well. Further, because the non-isolated converter steps down the voltage and the isolated converter operates on this low stepped down voltage, the system is able to be highly efficient.
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Citations
46 Claims
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1. A cascade power apparatus comprising:
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a. a non-isolated converter having a switching element, wherein the non-isolated converter receives a rectified power signal having an unregulated voltage and generates a regulated voltage; b. an isolated converter coupled with the non-isolated converter for receiving the regulated voltage and generating a converted voltage; c. a transformer coupled with the isolated converter for receiving the converted voltage and generating an output voltage; and d. an internal controller coupled with an output of the isolated converter for receiving the converted voltage and generating a control signal for adjusting the switching element based on a feedback algorithm, wherein the feedback algorithm is independent of the output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cascade power system comprising:
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a. an electronic device for receiving an output voltage; b. a power supply for generating an AC input signal; and c. a power converter coupled between the power supply and the electronic device comprising; i. a rectifier for receiving the AC input signal and generating a rectified power signal having an unregulated rectified voltage; ii. a non-isolated converter having a switching element, wherein the non-isolated converter receives the unregulated voltage and generates a regulated voltage; iii. an isolated converter coupled with the non-isolated converter for receiving the regulated voltage and generating a converted voltage; iv. a transformer coupled with the isolated converter for receiving the converted voltage and generating the output voltage; and v. an internal controller coupled with an output of the isolated converter for receiving the converted voltage and generating a control signal for adjusting the switching element based on a feedback algorithm, wherein the feedback algorithm is independent of the output voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of regulating a cascade power apparatus comprising:
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a. receiving an unregulated rectified voltage at a non-isolated converter comprising a switching element and generating regulated voltage; b. receiving the regulated voltage at an isolated converter and generating a converted voltage; c. receiving the converted voltage at a transformer and generating an output voltage; and d. receiving the converted voltage at an internal controller and generating a control signal that adjusts the switching element based on a feedback algorithm, wherein the feedback algorithm is independent of the output voltage. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A cascade power apparatus comprising:
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a. a rectifier for receiving an AC input signal and generating a rectified power signal having an unregulated rectified voltage; b. a non-isolated converter having a switching element, wherein the non-isolated converter receives the rectified power signal having the unregulated voltage and generates a regulated voltage; c. an isolated converter coupled with the non-isolated converter for receiving the regulated voltage and generating a converted voltage; d. a transformer coupled with the isolated converter for receiving the converted voltage and generating an output voltage; and e. an internal controller coupled with an output of the isolated converter for receiving the converted voltage and generating a control signal for adjusting the switching element based on a feedback algorithm, wherein the feedback algorithm is independent of the output voltage. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification