Step down the voltage in the transmission lines using capacitors and high frequency switches
AssigneeSaudi Arabian Oil Company
InventorAbdulmalik Muteb Almutairi
Life of this patent
Estimating the term…
Abstract
A circuit for stepping down an alternating current (AC) voltage from an input voltage to an output voltage. The circuit includes an input configured to couple to a voltage source for providing the input voltage as an AC signal to the circuit. The circuit also includes a first and a second capacitor in parallel with the input and an output. The circuit further includes a first and a second inductor in series with the input and the output. Additionally, the circuit includes a first switch in series with the input and the output and a second switch, wherein the output voltage of the circuit provided to the output is an AC signal that is less than or equal to the input AC signal based on a duty cycle of the first switch.
Claims8
A circuit for stepping down an alternating current (AC) voltage from an input voltage to an output voltage, the circuit comprising:
- an input configured to couple to a voltage source for providing the input voltage as an AC signal to the circuit, wherein the input voltage has a frequency of 60 Hz and the output voltage has a frequency of 60 Hz;
- a first and a second capacitor in parallel with the input and an output, wherein the first and second capacitors have a capacitance of 1 microFarad (uF);
- a first and a second inductor in series with the input and the output, wherein the first and second inductors have an inductance of an inductance of 2.5 millihenries (mH);
- a first switch in series with the input and the output and a second switch, wherein the first and second switch are complementary and are thyristors that perform switching at a frequency of 10 kilohertz (kHz), such that the first switch and second switch have a total duty cycle length of 100 microseconds;
- and
- wherein the output voltage of the circuit provided to the output is an AC signal that is less than or equal to the input AC signal based on a duty cycle of the first switch, wherein the output voltage is characterized by the input voltage multiplied by
- D
- 2
- -
- D
- ,
- D being the duty cycle of the first switch.
A circuit for stepping down an alternating current (AC) voltage comprising:
- a first input having a negative terminal coupled to a ground pin and a positive terminal coupled to a first terminal of a first inductor;
- wherein the first input is configured to couple to a voltage source for providing input voltage as an AC signal to the circuit;
- a first switch having a first terminal coupled to a second terminal of the first inductor and a second terminal coupled to a first node;
- a second switch having a first terminal coupled to the first node and a second terminal coupled to the ground pin, wherein the first switch and second switch perform switching at a frequency of 10 kilohertz (kHz), such that the first switch and second switch have a total duty cycle length of 100 microseconds;
- a second inductor having a first terminal coupled to the first node and a second terminal coupled to a second node, wherein the first and second inductors have an inductance of an inductance of 2.5 millihenries (mH);
- a second capacitor having a first terminal coupled to the second node and a second terminal coupled to the ground pin, wherein the first and second capacitor have a capacitance of 1 microFarad (uF);
- a positive output terminal coupled to the second node;
- and
- a negative output terminal coupled to the ground pin, wherein the first and second switches are thyristors, such that the second terminal of the first switch and the first terminal of the second switch are cathodes of the respective switches that are coupled to the first node.
Dependencies are inferred from the claim text.