Online insulation detection circuit based on inverter and inverter system
A technology for detecting circuits and inverters, which is applied in the direction of testing circuits, testing dielectric strength, and converting irreversible DC power input to AC power output, which can solve problems such as inability to detect insulation resistance online.
Inactive Publication Date: 2021-02-26
HANGZHOU EV TECH CO LTD
View PDF7 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of this application is to provide an inverter-based online insulation detection circuit and inverter system to alleviate the technical problem that the insulation resistance cannot be detected online.
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
[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. the embodiment. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0052] The terms "including" and "having" mentioned in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes other unlisted steps or units, or optionally ...
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 an online insulation detection circuit based on an inverter and an inverter system, and relates to the technical field of power converters. The detection circuit comprises a DCbias circuit, a first sampling circuit, a filter and a controller; one end of the DC bias circuit is connected with a ground wire, and the other end is connected with a first node of the inverter. Thefirst sampling circuit is respectively connected with the ground wire, the first node and the filter; the filter is further connected with a first port of the controller and the ground wire. A secondport of the controller is connected with the ground wire; the first node is an output live wire or an output zero wire of the inverter; the DC bias circuit comprises a first relay, a first divider resistor and a first DC bias power supply. One end of the first relay is connected with the first node, and the other end is connected with the first divider resistor; the first divider resistor is alsoconnected with the positive electrode of the first DC bias power supply, and the negative electrode of the first DC bias power supply is connected with the ground wire; the technical problem that whether the insulation impedance fails or not cannot be detected on line is solved.
Description
technical field [0001] The present application relates to the technical field of power converters, in particular to an inverter-based online insulation detection circuit and an inverter system. Background technique [0002] An inverter is a circuit that converts direct current into alternating current, and is widely used in power conversion. For example, an on-board charger (OBC) that converts DC power from a high-voltage battery unit to AC power. [0003] When the inverter is in normal operation, that is, in the process of outputting AC power, the insulation resistance of the output terminal to the ground is the insulation resistance between the output live wire or the output neutral wire and the ground wire, which must be able to ensure personal safety. value. There are related safety regulations such as GB13870.2 which stipulate that when a person accidentally touches the output live wire or output neutral wire, it must be ensured that the current passing through the pe...
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): G01R31/14H02M7/42
CPCG01R31/14H02M7/42
Inventor 李文渝平定钢林铖阳刘钢
Owner HANGZHOU EV TECH CO LTD