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Inverter control method, AC load drive system, refrigeration circuit

A technology of AC load and control method, which is applied in the direction of converting irreversible DC power input into AC power output

Active Publication Date: 2022-04-26
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Patent Document 1 below discloses that when the voltage input to the inverter drops extremely, the operation of the inverter is stopped to prevent malfunction of the inverter and damage to components.

Method used

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  • Inverter control method, AC load drive system, refrigeration circuit
  • Inverter control method, AC load drive system, refrigeration circuit
  • Inverter control method, AC load drive system, refrigeration circuit

Examples

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Embodiment Construction

[0026] figure 1 It is a block diagram showing the configuration of an AC load driving system 100 , and here, the AC load driving system 100 drives an AC load 5 . As the AC load 5, either a single-phase AC load or a multi-phase AC load can be used. For example, AC load 5 is an AC motor. For example, the AC motor drives a compressor for a refrigeration circuit. For example, the AC motor drives a fan that supplies air to a heat exchanger for a refrigeration circuit. For example, the AC motor drives a fan for an air cleaner.

[0027] The AC load drive system 100 includes an inverter 4 . The inverter 4 converts the DC voltage Vdc input to itself into an AC voltage V1 and applies the AC voltage V1 to the AC load 5 . The inverter 4 supplies the AC load 5 with electric power (hereinafter referred to as “operating power”) Po for operating the AC load 5 . The number of phases of the AC voltage V1 corresponds to the number of phases of the AC load 5 .

[0028] The AC load driving ...

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PUM

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Abstract

Heat generation of switching elements of the inverter is suppressed. The AC load drive system (100) has: a converter (2) that converts an AC voltage (V2) output from a commercial power supply (1) into a DC voltage (Vdc); and an inverter (4) that converts the The DC voltage (Vdc) is converted into an AC voltage (V1) to supply operating power (Po) to the AC load (5). The control circuit (6) detects the current voltage (Vdc), and can reduce the power (Po) supplied from the inverter (4) to the AC load (5) if the DC voltage (Vdc) is lower than a predetermined first value.

Description

technical field [0001] The present disclosure relates to power converters. Background technique [0002] Patent Document 1 below discloses that when the voltage input to the inverter drops extremely, the operation of the inverter is stopped to prevent malfunction of the inverter and damage to components. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 63-290193 Contents of the invention [0006] The problem to be solved by the invention [0007] The present disclosure suppresses heat generation of the inverter. [0008] means to solve the problem [0009] The AC load driving system (100) of the present disclosure has an inverter (4) and a control circuit (6), wherein the inverter (4) converts an input DC voltage (Vdc) into a first AC voltage (V1) And applied to the AC load (5). [0010] In this first aspect, the control circuit can reduce the power supplied from the inverter to the AC load ( Po)(S84)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48
CPCH02M7/48
Inventor 中岛雄希
Owner DAIKIN IND LTD