Voltage fluctuation protection method and device of electric appliance, storage medium and electric appliance
A technology of voltage fluctuations and electrical appliances, applied in the field of control, can solve the problems of the main circuit not being disconnected in time and inrush current, and achieve the effects of preventing potential safety hazards, preventing inrush current, and avoiding inrush current
Active Publication Date: 2021-12-24
GREE ELECTRIC APPLIANCES INC
View PDF13 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004]
The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies, and provide a voltage fluctuation protection method, device, storage medium and electrical appliances for electrical appliances, so as to solve the problem that the main circuit cannot be timely when the power supply in the related art drops from the original voltage to a certain voltage. Disconnected, when the power supply output high-voltage contactor pulls in again, the pressure difference reaches a certain level and causes the problem of inrush current
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
Embodiment Construction
[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embo...
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 provides a voltage fluctuation protection method and device for an electric appliance, a storage medium and the electric appliance, and the method comprises the steps: obtaining a change value of an instantaneous voltage and / or a change value of an average voltage at a preset interval of a bus input voltage of the electric appliance, calculating a first voltage drop slope according to the change value of the instantaneous voltage and / or calculating a second voltage drop slope according to the change value of the average voltage; and determining whether to trigger a preset protection operation according to whether the first voltage drop slope is greater than a preset no-load voltage drop slope and / or whether the second voltage drop slope is greater than the preset no-load voltage drop slope. According to the scheme provided by the invention, impact current caused by voltage difference can be avoided, and potential safety hazards are prevented.
Description
technical field [0001] The invention relates to the field of control, in particular to a voltage fluctuation protection method, device, storage medium and electric appliance for electrical appliances. Background technique [0002] At present, new energy vehicles use high-voltage DC power supplies to power vehicle air conditioners. Due to the existence of a large number of capacitive loads, a huge surge current will be generated when the circuit is closed, which may cause damage to high-voltage circuit components in severe cases. Therefore, the usual practice is to design a pre-charging circuit to prevent instantaneous inrush current, that is, connect a pre-charging contactor and a pre-charging resistor in parallel at both ends of the main contactor between the output of the power supply and the input of the air conditioner, and first close the pre-charging circuit. Contactor, when the capacitor charging reaches the power supply voltage, the main contactor is closed, the pre-...
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 Applications(China)
IPC IPC(8): B60L1/00B60L3/00
CPCB60L1/00B60L3/0023
Inventor 李俊彦褚艳伟魏智乐谢四雄胡聪单成龙
Owner GREE ELECTRIC APPLIANCES INC