Current controlled resonant tank circuit
First Claim
1. A power converter comprising:
- a. a non-isolated buck converter having a first switching element, wherein the non-isolated buck converter receives a rectified power signal having an unregulated voltage and generates a buck converter output voltage;
b. an isolated Class-E amplifier having a second switching element, wherein the isolated Class-E amplifier is coupled with the non-isolated buck converter for receiving the buck converter output voltage and generating a converted voltage;
c. a galvanic isolation circuit coupled with the isolated Class-E amplifier for receiving the converted voltage and generating an output voltage;
d. a current loop comprising an inductor, a capacitor and a diode coupled in series, wherein the capacitor is coupled to the isolated Class-E amplifier, a first terminal of the inductor is coupled to the Class-E amplifier and a second terminal of the inductor is coupled to the non-isolated buck converter; and
d. a feedback control circuit coupled to sense the output voltage and to provide a corresponding signal to the non-isolated buck converter so as to regulate the output voltage by turning ON and OFF the first switching element, wherein when the first switching element is turned ON energy is stored in the inductor and when the first switching element is turned OFF energy stored in the inductor induces a current loop current from the inductor to the capacitor that charges the capacitor, and a resulting energy stored in the capacitor is transferred by the isolated Class-E amplifier through the galvanic isolation circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A cascade power system includes a non-isolated buck converter in cascade with an isolated Class-E resonant circuit, where the Class-E resonant circuit operates at high frequency, for example 4 Mhz. Further, the non-isolated buck converter is configured as a current source coupled to the Class-E resonant circuit which provides a buck converter output voltage as input to the Class-E resonant circuit. The Class-E resonant circuit includes capacitive isolation for the cascade power system output. The cascade power system further includes a feedback control circuit for regulating a system output voltage. A feedback signal is used to adjust a duty cycle of the buck converter, thereby adjusting a buck converter output voltage. The buck converter output voltage is provided as input to the Class-E resonant circuit.
-
Citations
27 Claims
-
1. A power converter comprising:
-
a. a non-isolated buck converter having a first switching element, wherein the non-isolated buck converter receives a rectified power signal having an unregulated voltage and generates a buck converter output voltage; b. an isolated Class-E amplifier having a second switching element, wherein the isolated Class-E amplifier is coupled with the non-isolated buck converter for receiving the buck converter output voltage and generating a converted voltage; c. a galvanic isolation circuit coupled with the isolated Class-E amplifier for receiving the converted voltage and generating an output voltage; d. a current loop comprising an inductor, a capacitor and a diode coupled in series, wherein the capacitor is coupled to the isolated Class-E amplifier, a first terminal of the inductor is coupled to the Class-E amplifier and a second terminal of the inductor is coupled to the non-isolated buck converter; and d. a feedback control circuit coupled to sense the output voltage and to provide a corresponding signal to the non-isolated buck converter so as to regulate the output voltage by turning ON and OFF the first switching element, wherein when the first switching element is turned ON energy is stored in the inductor and when the first switching element is turned OFF energy stored in the inductor induces a current loop current from the inductor to the capacitor that charges the capacitor, and a resulting energy stored in the capacitor is transferred by the isolated Class-E amplifier through the galvanic isolation circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A power system comprising:
-
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. an input rectifier for receiving the AC input signal and generating a rectified power signal having an unregulated voltage; ii. a non-isolated buck converter having a first switching element, wherein the non-isolated buck converter receives a rectified power signal having an unregulated voltage and generates a buck converter output voltage; iii. an isolated Class-E amplifier having a second switching element, wherein the isolated Class-E amplifier is coupled with the non-isolated buck converter for receiving the buck converter output voltage and generating a converted voltage; iv. a galvanic isolation circuit coupled with the isolated Class-E amplifier for receiving the converted voltage and generating an output voltage; v. a current loop comprising an inductor, a capacitor and a diode coupled in series, wherein the capacitor is coupled to the isolated Class-E amplifier, a first terminal of the inductor is coupled to the Class-E amplifier and a second terminal of the inductor is coupled to the non-isolated buck converter; and vi. a feedback control circuit coupled to sense the output voltage and to provide a corresponding signal to the non-isolated buck converter so as to regulate the output voltage by turning ON and OFF the first switching element, wherein when the first switching element is turned ON energy is stored in the inductor and when the first switching element is turned OFF energy stored in the inductor induces a current loop current from the inductor to the capacitor that charges the capacitor, and a resulting energy stored in the capacitor is transferred by the isolated Class-E amplifier through the galvanic isolation circuit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification