Inverter apparatus and method of controlling the same
First Claim
1. An inverter apparatus configured to convert a DC input voltage into an AC output voltage for supplying power to a load, the inverter apparatus comprising:
- a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch and the fourth switch form a first switch assembly, and the second switch and the third switch form a second switch assembly;
a load detection unit configured to detect an operation condition of the load and provide a load signal; and
a control unit configured to receive the load signal and provide a plurality of control signals to correspondingly control the switches;
wherein the control unit is configured to select a control mode to be that two switches of the first switch assembly are not turned off and at least one switch of the second switch assembly is turned off, or two switches of the second switch assembly are not turned off and at least one switch of the first switch assembly is turned off, or two switches of the first switch assembly and two switches of the second switch assembly are not turned off according to the load signal, wherein the control signals are produced by comparing a first modulation wave and a second modulation wave with a carrier wave having a zero minimum value.
1 Assignment
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Accused Products
Abstract
An inverter apparatus includes a first switch, a second switch, a third switch, a fourth switch, a load detection unit, and a control unit. The first switch and the fourth switch form a first switch assembly, and the second switch and the third switch form a second switch assembly. The control unit selects a control mode to be that two switches of the first switch assembly are not turned off and at least one switch of the second switch assembly is turned off, or two switches of the second switch assembly are not turned off and at least one switch of the first switch assembly is turned off, or two switches of the first switch assembly and two switches of the second switch assembly are not turned off.
12 Citations
13 Claims
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1. An inverter apparatus configured to convert a DC input voltage into an AC output voltage for supplying power to a load, the inverter apparatus comprising:
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a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch and the fourth switch form a first switch assembly, and the second switch and the third switch form a second switch assembly; a load detection unit configured to detect an operation condition of the load and provide a load signal; and a control unit configured to receive the load signal and provide a plurality of control signals to correspondingly control the switches; wherein the control unit is configured to select a control mode to be that two switches of the first switch assembly are not turned off and at least one switch of the second switch assembly is turned off, or two switches of the second switch assembly are not turned off and at least one switch of the first switch assembly is turned off, or two switches of the first switch assembly and two switches of the second switch assembly are not turned off according to the load signal, wherein the control signals are produced by comparing a first modulation wave and a second modulation wave with a carrier wave having a zero minimum value. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. A method of controlling an inverter apparatus, the inverter apparatus configured to convert a DC input voltage into an AC output voltage for supplying power to a load, and the inverter apparatus comprising a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch and the fourth switch form a first switch assembly, and the second switch and the third switch form a second switch assembly, the method of controlling the inverter apparatus comprising steps of:
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(a) detecting an operation condition of the load and providing a load signal; (b) receiving the load signal and providing a plurality of control signals to correspondingly control the switches; and (c) selecting a control mode to be that two switches of the first switch assembly are not turned off and at least one switch of the second switch assembly is turned off, or two switches of the second switch assembly are not turned off and at least one switch of the first switch assembly is turned off, or two switches of the first switch assembly and two switches of the second switch assembly are not turned off according to the load signal, wherein the control signals are produced by comparing a first modulation wave and a second modulation wave with a carrier wave having a zero minimum value. - View Dependent Claims (8, 9)
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10. An inverter apparatus configured to convert a DC input voltage into an AC output voltage for supplying power to a load, the inverter apparatus comprising:
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a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch and the fourth switch form a first switch assembly, and the second switch and the third switch form a second switch assembly; a load detection unit configured to detect an operation condition of the load and provide a load signal; and a control unit configured to receive the load signal and provide a plurality of control signals to correspondingly control the switches; wherein the control unit is configured to select a control mode to be that two switches of the first switch assembly are not turned off and at least one switch of the second switch assembly is turned off, or two switches of the second switch assembly are not turned off and at least one switch of the first switch assembly is turned off, or two switches of the first switch assembly and two switches of the second switch assembly are not turned off according to the load signal, wherein the control signals are produced by comparing a first modulation wave and a second modulation wave with a carrier wave having positive and negative values symmetrical to a zero value. - View Dependent Claims (11, 12)
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Specification