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Method and device for controlling bus voltage of frequency conversion air conditioner controller, and air conditioner

A bus voltage control and bus voltage technology, which is applied in heating and ventilation control systems, output power conversion devices, heating methods, etc., can solve problems such as excessive current and large boost voltage difference in PFC circuits.

Active Publication Date: 2021-10-15
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem solved by the present invention is that the existing PFC circuit boosts the voltage by controlling and outputting a fixed voltage. When the input AC voltage is low, the boost voltage difference of the PFC circuit is too large, and the current may be too large.

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  • Method and device for controlling bus voltage of frequency conversion air conditioner controller, and air conditioner
  • Method and device for controlling bus voltage of frequency conversion air conditioner controller, and air conditioner
  • Method and device for controlling bus voltage of frequency conversion air conditioner controller, and air conditioner

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Embodiment Construction

[0037] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] In order to facilitate the understanding of the various embodiments of the present invention, the following are given as figure 1 The schematic diagram of the circuit topology of the inverter air conditioner controller is shown. Such as figure 1 , including AC power supply (AC power supply), rectifier module (that is, a single-phase full-wave rectifier bridge composed of four diodes), inductor L1, diode D1, PFC circuit, capacitor C, PWM control module and load compressor. The controller can Realize AC-DC conversion, that is, alternating current to direct current, and then drive the compressor motor to run. The average value of the output voltage of the controller circuit is always greater than or equal to the input voltage, and th...

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Abstract

The invention provides a method and device for controlling bus voltage of a frequency conversion air conditioner controller and an air conditioner. The method includes: obtaining the current required bus voltage and the current actual bus voltage; obtaining the voltage modulation ratio based on the current required bus voltage and the current actual bus voltage; and determining the target bus according to the voltage modulation ratio The actual bus voltage is controlled by the PFC circuit to approach the target bus voltage. The present invention can automatically adapt to busbar voltage control under different voltages, and avoids the problem of excessively high boosted voltage resulting in excessively large IGBT current.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method and device for controlling the bus voltage of an inverter air conditioner controller, and an air conditioner. Background technique [0002] At present, the electric energy required by the air conditioner motor is in the form of direct current, so it is necessary to convert the input alternating current into direct current, and after the alternating current is rectified, the power factor is low. In order to improve the power factor of the power supply, power factor correction (Power Factor Correction) is usually used , PFC) circuit. [0003] During the actual operation of the inverter air conditioner, the frequency range is wide. When operating at high frequency, due to the existence of the power generation voltage and the voltage drop of the device, there will be insufficient bus voltage. The PFC circuit can control the bus boost. However, the existing The boos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/30F24F11/64F24F11/70F24F11/88H02M1/42H02M5/458
CPCF24F11/30F24F11/64F24F11/70F24F11/88H02M1/4225H02M5/458Y02B70/10
Inventor 黄宁李家质张杰
Owner NINGBO AUX ELECTRIC