PFC circuit switching method, air conditioner, and computer-readable storage medium
An air conditioner and circuit technology, which is applied in the direction of electronic commutation motor control, generator control, motor generator control, etc., can solve the problem of not being able to take into account the requirements of energy efficiency and power factor of air conditioners at the same time, and achieve both energy efficiency and power factor. Effect
Active Publication Date: 2020-05-22
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The main purpose of the present invention is to provide a method for switching PFC circuits, an air conditioner and a computer-readable storage medium, aiming to solve the problem that existing air conditioners often only use high-frequency PFC or low-frequency PFC and cannot take into account the air conditioner's energy efficiency and power at the same time. Technical Issues of Factor Requirements
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
no. 1 example
[0089] Based on the first embodiment, the second embodiment of the switching method of the PFC circuit of the present invention is proposed, referring to Figure 6 , in this embodiment, step S200 includes:
[0090] Step S210, determining whether the demand voltage is lower than the DC bus voltage;
[0091] Step S220, when the demand voltage is greater than or equal to the DC bus voltage, determine that the first working state is a high-frequency PFC state.
[0092] Further, in an embodiment, after step S210, the method further includes: when the demand voltage is lower than the DC bus voltage, determining that the first working state is a low-frequency PFC state.
[0093] In this embodiment, when the DC bus voltage of the compressor and the demand voltage of the bus voltage are obtained, it is determined whether the demand voltage is less than the DC bus voltage, and if the demand voltage is greater than or equal to the DC bus voltage, then it is determined that the first wor...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a switching method of a PFC circuit; the switching method comprises the following steps of acquiring the direct current bus voltage of an air conditioner compressor, and the demand voltage of the bus voltage of the compressor; based on the mapping relation among the direct current bus voltage, the demand voltage and the working state of the PFC circuit, determining the first working state matched with the direct current bus voltage; determining whether the first working state is consistent with the current second working state of the PFC circuit or not; and when the first working state is inconsistent with the second working state, switching the working state of the PFC circuit into the first working state. The invention further discloses an air conditioner and a computer readable storage medium. Switching between a low-frequency PFC state and a high-frequency PFC state can be reasonably realized according to the direct-current bus voltage and the demand voltageof the bus voltage, so that the air conditioner can meet the requirements of energy efficiency and power factor.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a PFC circuit switching method, an air conditioner and a computer-readable storage medium. Background technique [0002] Currently, PFC (Power Factor Correction, power factor correction) technology has been widely used in air conditioners, and the PFC technology includes low-frequency PFC and high-frequency PFC. [0003] Among them, the low-frequency PFC is a PFC technology with a low switching frequency. Generally, its switching frequency is less than 1 KHz, such as single-pulse PFC and multi-pulse PFC. High-frequency PFC is a PFC technology with a switching frequency above 30K, including topologies such as BoostPFC and totem-pole PFC. High-frequency PFC can effectively improve power factor. Systems using high-frequency PFC have a high power factor, but are less efficient than systems using low-frequency PFC. [0004] Existing air conditioners generally use high-frequ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/28H02P23/26
CPCH02P21/28H02P23/26
Inventor 李曹磊
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD