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Inverter control method and UPS

A control method and inverter technology, applied in the field of UPS, can solve the problems of device failure, reduce system reliability, and long-term operation of hardware current limiting circuit, and achieve the effect of preventing device failure and improving reliability.

Pending Publication Date: 2021-08-06
ZHANGZHOU KEHUA TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides an inverter control method and UPS to solve the problem that the hardware current limiting circuit may work for a long time when the inverter is connected to the RCD load in the prior art, causing the device to fail and reducing the system's power consumption. question of reliability

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  • Inverter control method and UPS
  • Inverter control method and UPS

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Embodiment Construction

[0020] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0021] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0022] refer to figure 2 , the embodiment of the present invention provides an inverter control method, the inverter adopts instantaneous value loop control, and the instantaneous value loop is provided with a limiter; the inverter control method includes:

[0023] S...

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Abstract

The invention is suitable for the technical field of UPSs, and provides an inverter control method and a UPS. An inverter adopts instantaneous value ring control, and the instantaneous value ring is provided with an amplitude limiter. The inverter control method comprises the following steps of: sampling a trigger state signal of a current-limiting protection device of the inverter within a first preset time to obtain a first number of trigger state values, wherein the first number of trigger state values comprises a second number of first preset values; and if the second number is greater than a first preset number, reducing an amplitude limiting value of an amplitude limiter of an instantaneous value ring of the inverter to a first preset amplitude value. When the inverter is connected with an RCD load, if the inverter enters a hardware current limiting state for a long time, the amplitude limiting value of the instantaneous value ring of the inverter is reduced, so that the inverter performs software current limiting and exits from the hardware current limiting state, a hardware current limiting protection device is prevented from working for a long time to cause device failure, and the reliability of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of UPS, in particular to an inverter control method and UPS. Background technique [0002] RCD load is a nonlinear analog load, which can be used to test power supply equipment such as UPS to understand its real working ability when it is equipped with nonlinear loads such as computers and network equipment. refer to figure 1 , when a sinusoidal voltage is applied to the RCD load, the current of the RCD load is intermittent and peak. [0003] In the prior art, when the inverter is connected to the RCD load, in order to prevent equipment damage caused by the peak current of the RCD load, a hardware current limiting protection device is usually provided. When the current of the RCD load is greater than a preset value, the hardware current limiting is triggered. However, when the RCD load is fully loaded, the hardware current limiting protection device may work for a long time, causing device failure and redu...

Claims

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Application Information

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IPC IPC(8): H02M7/48H02M1/32H02J9/06
CPCH02M7/48H02M1/32H02J9/062
Inventor 张堡森王定富郭银全
Owner ZHANGZHOU KEHUA TECH CO LTD
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