Single-phase DCAC converter with adjustable gain, control method and three-phase DCAC converter
A control method and converter technology, which are used in output power conversion devices, conversion of AC power input to DC power output, climate sustainability, etc.
Active Publication Date: 2022-06-03
SHENZHEN GROWATT NEW ENERGY TECH
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[0005] The purpose of the present invention is to provide a gain-adjustable single-phase DCAC converter, a control method and a three-phase DCAC converter to solve the problem that the existing inverter can only achieve a maximum gain of 1 times
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[0018] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Several embodiments of the invention are presented in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions are used herein for the purpose of illustration only.
[0020] Unless otherwis...
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The invention provides a single-phase DCAC converter with adjustable gain. The single-phase DCAC converter comprises a DC power supply, a first inductor, a second inductor, a first switching tube, a bidirectional switch, a third switching tube, a first capacitor, a second capacitor, a load, a first diode and a second diode, the positive electrode of the direct-current power supply is connected with the first end of the first switching tube; according to the single-phase DCAC converter with the adjustable gain, when the gain is required to be achieved, the gain is set to be 1t; 0 or the wanted gain gt; when 1, the inverter works in a first working mode, and at the moment, the intermittent inverter works in a voltage reduction mode; a gain lt to be achieved; and when 1 is greater than 1, the interrupted inverter cannot meet the working condition at the moment, the interrupted inverter is switched to the second working mode, and the Buck circuit continues to work, so that high gain is realized. The invention further provides a control method of the gain-adjustable single-phase DCAC converter and a three-phase inverter.
Description
technical field [0001] The invention relates to the technical field of inverters, in particular to a single-phase DCAC converter with adjustable gain, a control method and a three-phase DCAC converter. Background technique [0002] Inverters are divided into voltage source inverters and current source inverters, while most of the traditional voltage source inverters are step-down circuits, that is, the output AC voltage is lower than the input DC voltage. Therefore, many applications at present are to add a first-stage boost circuit (such as a Boost circuit) before the inverter circuit, so that the inverter becomes a two-stage structure, which will increase the volume and reduce the system stability. Therefore, a single-stage high gain is studied. The inverter is very important, so some scholars have proposed the Z-source inverter, which is an impedance network composed of two inductors and two capacitors, which can realize the function of boosting, so it has been widely stu...
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Login to View More IPC IPC(8): H02M7/537
CPCH02M7/537Y02E10/56
Inventor 王清媛汪洪亮丁永强吴良材
Owner SHENZHEN GROWATT NEW ENERGY TECH