The invention provides a detection circuit and method for an alternating current power supply and a vehicle-mounted charger, and the method comprises the steps: obtaining a first sampling signal in response to a power starting action of a user for the alternating current power supply, the first sampling signal comprising a sampling signal of a first sampling point and a sampling signal of a second sampling point; performing impedance matching and hardware filtering on the first sampling signal to obtain a second sampling signal; the second sampling signal is subjected to software filtering, a third sampling signal is obtained, and the third sampling signal comprises a voltage effective value and a voltage peak value of the first sampling point and a voltage effective value and a voltage peak value of the second sampling point; and when the deviation value of the voltage effective value of the first sampling point and the voltage effective value of the second sampling point is greater than or equal to a preset voltage deviation threshold value, determining that the alternating current power supply leaks electricity. By means of the method, the problem that in the application scene of the alternating-current power supply, the electric leakage phenomenon of the alternating-current power supply causes hidden danger to the personal safety of a user is solved.
本申请提供一种交流电源的检测电路、方法及车载充电机,响应于用户针对交流电源的电源开启动作,获取第一采样信号,第一采样信号包括第一采样点的采样信号和第二采样点的采样信号;对第一采样信号进行阻抗匹配以及硬件滤波,得到第二采样信号;对第二采样信号进行软件滤波,得到第三采样信号,第三采样信包括第一采样点的电压有效值和电压峰值以及第二采样点的电压有效值和电压峰值;当第一采样点的电压有效值与第二采样点的电压有效值的偏差量大于或等于预设电压偏差阈值时,确认交流电源发生漏电。本申请通过上述方法,解决了在应用交流电源的场景下,交流电源的发生漏电现象对用户人身安全造成隐患的问题。
Electric leakage detection method and circuit of alternating current power supply and vehicle-mounted charger
一种交流电源的漏电检测方法、电路及车载充电机
2023-08-15
Patent
Elektronische Ressource
Chinesisch
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