Charger and leakage current protection device for charger
A protective device and leakage current technology, which is applied in the direction of circuit devices, automatic disconnection emergency protection devices, emergency protection circuit devices, etc., can solve the problems of not considering the leakage current changes of components, leakage current changes, etc., to avoid damage and improve safety effect
Active Publication Date: 2019-02-26
BYD CO LTD
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Problems solved by technology
New chargers generally meet the national standards, but in the long-term use process, with the prolongation of time and the aging of various components, there may be changes in leakage current
However, the relevant technology does not consider the leakage current change caused by component aging, and there is a certain danger.
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[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0016] A leakage current protection device for a charger proposed by an embodiment of the present invention and a charger having the device will be described below with reference to the accompanying drawings.
[0017] figure 1 is a schematic block diagram of a leakage current protection device for a charger according to an embodiment of the present invention. Chargers are used to convert AC power to DC power for the load. For example, the input terminal of the mobile phone charger is connected to the AC power supply, and the ou...
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The invention discloses a charger and a leakage current protector for the charger. The charger converts AC power into DC power and provides the DC power to a load. The leakage current protector comprises a leakage current detection module, an alarm signal generation module and a power supply module; the first input end of the leakage current detection module is connected with the grounding end of a DC power supply, the second input end of the leakage current detection module is connected with the grounding end of an AC power supply, and the leakage current detection module detects leakage current of the charger and outputs a detection voltage according to the detected leakage current; the alarm signal generation module is connected with the output end of the leakage current detection module, and generates an electric leakage alarm signal according to the detection voltage; and the power supply module supplies power to the leakage current detection module and the alarm signal generation module. Thus, the leakage current protector can raise the alarm when the leakage current of the charger exceeds the standard, avoids damage on the human body, and improves the safety and reliability of the charger.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a leakage current protection device for a charger and a charger with the device. Background technique [0002] Chargers in the related art have relatively high requirements on electricity safety. For example, relevant national standards stipulate that parts of the charger that can be in contact with the human body should not have excessive leakage current. New chargers generally meet the national standards, but in the long-term use process, with the extension of time and the aging of various components, changes in leakage current may occur. However, in the related art, the change of the leakage current caused by the aging of the components and the like is not taken into consideration, and there is a certain danger. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. The...
Claims
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IPC IPC(8): H02H3/32
Inventor 程连利
Owner BYD CO LTD