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US 2022/0069731 A1Published application
High Frequency Multi-Level Inverter
AssigneeSolaredge Technologies Ltd.
InventorIlan Yoscovich
Life of this patent
Estimating the term…
Abstract
A multi-level inverter having at least two banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.
Claims17
A method of operating a single-phase multi-level inverter for generating a sine-wave AC output signal having a first frequency, wherein the single-phase multi-level inverter comprises:
- four banks, each comprising series connected MOSFET transistors, wherein a first bank of the four banks is connected in series with a second bank of the four banks, a third bank of the four banks is connected in series with a fourth bank of the four banks, and the series connection of the first bank and the second bank is connected in parallel to the series connection of the third bank and the fourth bank,
- at least one first capacitor, each of the at least one first capacitor connected between two adjacent MOSFET transistors of the first bank and two adjacent MOSFET transistors of the second bank;
- at least one second capacitor, each of the at least one second capacitor connected between two adjacent MOSFET transistors of the third bank and two adjacent MOSFET transistors of the fourth bank;
- a first terminal and a second terminal for providing the sine-wave AC output signal having the first frequency there between, wherein
- the first terminal is between the first bank and the second bank, and
- the second terminal is between the third bank and the fourth bank;
- and wherein the method comprises:
- controlling each of the series connected MOSFET transistors of the first bank to switch at staggered times during each cycle of a switching frequency that is greater than the first frequency;
- controlling each of the series connected MOSFET transistors in the second bank to switch at staggered times during each cycle of the switching frequency;
- controlling each of the series connected MOSFET transistors in the third bank to switch at staggered times during each cycle of the switching frequency;
- and
- controlling each of the series connected MOSFET transistors in the fourth bank to switch at staggered times during each cycle of the switching frequency.
9 more elements
A single-phase multi-level inverter for generating a sine-wave AC output signal having a first frequency, wherein the single-phase multi-level inverter comprises:
- four banks, each comprises a plurality of MOSFET transistors connected in series, wherein a first bank of the four banks is connected in series with a second bank of the four banks, a third bank of the four banks is connected in series with a fourth bank of the four banks, and the series connected first and second banks is connected in parallel to the series connected third and fourth banks,
- at least one first capacitor, each of the at least one first capacitor connected between two adjacent MOSFET transistors of the first bank and two adjacent MOSFET transistors of the second bank;
- at least one second capacitor , each of at least one second capacitor connected between two adjacent MOSFET transistors of the third bank and two adjacent MOSFET transistors of the fourth bank;
- a first terminal and a second terminal for providing the sine-wave AC output signal having the first frequency there between, wherein
- the first terminal is between the first bank and the second bank , and
- the second terminal is between the third bank and the fourth bank ;
- and
- a controller configured to :
- control each of the plurality of MOSFET transistors of the first bank to switch at staggered times during each cycle of a switching frequency that is a greater than the first frequency;
- control each of the plurality of MOSFET transistors in the second bank to switch at staggered times during each cycle of the switching frequency;
- control each of the plurality of MOSFET transistors in the third bank to switch at staggered times during each cycle of the switching frequency;
- and
- control each of the plurality of MOSFET transistors in the fourth bank to switch at staggered times during each cycle of the switching frequency.
10 more elements
A single-phase multi-level inverter for generating a sine-wave AC output signal having a first frequency, wherein the single-phase multi-level inverter comprises:
- a first bank and a second bank connected in series at a third terminal and between a first terminal and a second terminal, wherein each of the first bank and the second bank comprise a plurality of series connected MOSFET transistors;
- at least one first capacitor, each of the at least one first capacitor connected between two adjacent MOSFET transistors of the a first bank and two adjacent MOSFET transistors of the second bank;
- a first inductor connected between the third terminal and a fourth terminal;
- a third plurality of series connected transistors coupled between the second terminal and the fourth terminal, and comprising a first intermediate point;
- a fourth plurality of series connected transistors coupled between the second terminal and the fourth terminal, and comprising a second intermediate point;
- and
- a controller configured to generate the sine-wave AC output signal having the first frequency between the first intermediate point and the second intermediate point by:
- switching each of the plurality of series connected MOSFET transistors of the first bank at staggered times during each cycle of a switching frequency that is greater than the first frequency;
- switching each of the plurality of series connected MOSFET transistors in the second bank at staggered times during each cycle of the switching frequency;
- and
- switching, at the first frequency, each transistor of the third plurality of series connected transistors and the fourth plurality of series connected transistors.
8 more elements
Dependencies are inferred from the claim text.