Bidirectional electrical signal converter
First Claim
1. A power converter comprising:
- a circuit comprising;
a first inductor-capacitor circuit;
a second inductor-capacitor circuit configured to be electrically connected to an alternating current (AC) element and the first inductor-capacitor circuit;
an electrical switching device electrically connected to the first inductor-capacitor circuit and the second inductor-capacitor circuit, the electrical switching device being configured to switch at a first predetermined frequency corresponding to a frequency of the AC element;
a first switching transistor electrically connected to the first inductor-capacitor circuit and configured to be electrically connected to a direct current (DC) element; and
a controller operatively connected to the first switching transistor to operate the power converter in an AC-to-DC conversion mode, the controller being configured to;
identify a first error between a measured DC output signal from the circuit that is applied to the DC element and a predetermined DC output signal; and
adjust a first duty cycle of a first pulse width modulation (PWM) switching signal to switch the first switching transistor at a second predetermined frequency with the first adjusted duty cycle to reduce the identified error, wherein the second predetermined frequency is greater than the first predetermined frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
A bidirectional AC-to-DC and DC-to-AC circuit includes a first inductor-capacitor (LC) circuit connected to an AC power source, a transistor synchronized with the AC power source signal, a second LC circuit electrically connected to the synchronized transistor and the first inductor-capacitor circuit, a high-frequency switching transistor electrically connected to the second inductor-capacitor circuit and a direct current (DC) load, and a controller connected to the high-frequency switching transistor. The controller identifies an error between a measured DC output signal and a predetermined DC output signal that is applied to the DC load, and adjusts a duty cycle of a pulse width modulation (PWM) switching signal for the high-frequency transistor to reduce the identified error.
19 Citations
19 Claims
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1. A power converter comprising:
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a circuit comprising; a first inductor-capacitor circuit; a second inductor-capacitor circuit configured to be electrically connected to an alternating current (AC) element and the first inductor-capacitor circuit; an electrical switching device electrically connected to the first inductor-capacitor circuit and the second inductor-capacitor circuit, the electrical switching device being configured to switch at a first predetermined frequency corresponding to a frequency of the AC element; a first switching transistor electrically connected to the first inductor-capacitor circuit and configured to be electrically connected to a direct current (DC) element; and a controller operatively connected to the first switching transistor to operate the power converter in an AC-to-DC conversion mode, the controller being configured to; identify a first error between a measured DC output signal from the circuit that is applied to the DC element and a predetermined DC output signal; and adjust a first duty cycle of a first pulse width modulation (PWM) switching signal to switch the first switching transistor at a second predetermined frequency with the first adjusted duty cycle to reduce the identified error, wherein the second predetermined frequency is greater than the first predetermined frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for converting power comprising the steps of:
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providing a circuit comprising a first inductor-capacitor circuit, a second inductor-capacitor circuit configured to be electrically connected to an alternating current (AC) element and the first inductor-capacitor circuit, an electrical switching device electrically connected to the first inductor-capacitor circuit and the second inductor-capacitor circuit, the electrical switching device being configured to switch at a first predetermined frequency corresponding to a frequency of the AC element, a first switching transistor electrically connected to the first inductor-capacitor circuit and configured to be electrically connected to a direct current (DC) element and a controller operatively connected to the first switching transistor to operate the power converter in an AC-to-DC conversion mode; identifying a first error between a measured DC output signal from the circuit that is applied to the DC element and a predetermined DC output signal; and adjusting a first duty cycle of a first pulse width modulation (PWM) switching signal to switch the first switching transistor at a second predetermined frequency with the first adjusted duty cycle to reduce the identified error, wherein the second predetermined frequency is greater than the first predetermined frequency. - View Dependent Claims (16, 17)
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18. A power converter comprising:
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a circuit including a first inductor-capacitor circuit; a second inductor-capacitor circuit configured to be electrically connected to an alternating current (AC) element and the first inductor-capacitor circuit; an electrical switching device electrically connected to the first inductor-capacitor circuit and the second inductor-capacitor circuit, the electrical switching device being configured to switch at a first predetermined frequency corresponding to a frequency of the AC element; a first switching transistor electrically connected to the first inductor-capacitor circuit and configured to be electrically connected to a direct current (DC) element; a second switching transistor electrically connected to the DC element and the first inductor-capacitor circuit; and a controller operatively connected to the second switching transistor to operate the power converter in a DC-to-AC conversion mode, the controller being configured to; identify an error between a measured AC output signal from the circuit that is applied to the AC element and a predetermined AC output signal for the AC element; and adjust a duty cycle of a pulse width modulation (PWM) switching signal to switch the second switching transistor at a second predetermined frequency with the adjusted duty cycle to reduce the error. - View Dependent Claims (19)
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Specification