Wide-range gain single-phase inverter, control method and three-phase inverter
A single-phase inverter, wide-range technology, applied in the direction of output power conversion device, 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 high-gain single-phase inverter, a control method and a three-phase inverter to solve the problem that the existing inverter can only achieve a maximum gain of 1 times
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[0019] 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.
[0020] 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 illustrative purposes only.
[0021] Unless otherwise defined, ...
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The invention provides a single-phase inverter with wide-range gain. The single-phase inverter comprises a direct-current power supply, a first inductor, a second inductor, a bidirectional switch, a second switching tube, a third switching tube, a first capacitor, a second capacitor, a load and a diode. According to the single-phase inverter with the wide-range gain, if the gain is to be reached, the gain is lt; when 1, the single-phase inverter with the wide-range gain is controlled to work in a first working mode, and the single-phase inverter with the wide-range gain is controlled to work in a voltage reduction mode; when a gain gt is required to be achieved; when the gain is 1, the single-phase inverter with the wide-range gain is switched to the second working mode, and the booster circuit continues to work, so that the limitation that the gain is 1 is broken through, high gain is realized, namely, the positive gain is infinite, the negative gain is also infinite, and meanwhile, the switching of the two modes can be ensured through control; and only one switch completely works at high frequency in one period, so that the switching loss is reduced.
Description
technical field [0001] The invention relates to the technical field of inverters, in particular to a high-gain single-phase inverter, a control method and a three-phase inverter. 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 studied. [0003] For the...
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Login to View More IPC IPC(8): H02M7/537
CPCH02M7/537Y02E10/56
Inventor 丁永强汪洪亮吴良材
Owner SHENZHEN GROWATT NEW ENERGY TECH