Power supply circuit, circuit fault detection method, circuit board and vehicle air conditioner
A technology for power supply circuits and detection components, which is used in electronic circuit testing, instruments, measuring electricity, etc., and can solve problems such as damage to switch components and power supply circuit failures.
Active Publication Date: 2021-11-26
MIDEA GRP CO LTD +1
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- Application Information
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Problems solved by technology
However, the existing step-up power supply circuit is generally provided with a switch part and a one-way conduction part. When the one-way conduction part is damaged and a short circuit occurs, the switch part will bear a higher turn-on current and easily cause damage, so that the power supply circuit There is a fault, and the existing power supply circuit does not have a detection measure for the fault caused by the short circuit of the one-way conducting part
Method used
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[0082] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote 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 only for explaining the present invention and should not be construed as limiting the present invention.
[0083] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in ...
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The invention discloses a power supply circuit, a circuit fault detection method, a circuit board and a vehicle-mounted air conditioner. The power supply circuit is provided with a first detection component and a second detection component, and uses the first detection component to obtain the current value flowing through the switch component and output the The first signal can preliminarily detect the working state of the one-way conducting part according to the first signal, and then use the second detection part to obtain the voltage value of the output terminal of the power supply and output the second signal, and can further confirm the state of the one-way conducting part according to the second signal working state, therefore, the above-mentioned power supply circuit can detect whether there is a fault caused by the short circuit of the one-way conducting part, and the accuracy of the detection result can be improved through the cooperation detection of the first detection part and the second detection part.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a power supply circuit, a circuit fault detection method, a circuit board, a vehicle air conditioner and a computer-readable storage medium. Background technique [0002] At present, car air conditioners generally use batteries to drive the operation, but using batteries to directly drive the compressor needs to output a very large current, so that the compressor needs to use very thick copper wires for winding; the existing car air conditioner power supply circuit generally uses the battery The voltage is provided to the compressor after step-up conversion. Since the voltage step-up can reduce the current under the same power, the purpose of reducing the volume and cost of the compressor can be achieved. However, the existing step-up power supply circuit is generally provided with a switch part and a one-way conduction part. When the one-way conduction part is damaged a...
Claims
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IPC IPC(8): G01R31/28H02M3/158
CPCG01R31/2812G01R31/2825H02M3/158
Inventor 霍兆镜
Owner MIDEA GRP CO LTD