The invention discloses an insulation detection circuit, method and device which can be used in the field of electronic circuits, the insulation detection circuit comprises a first switch, a second switch and a sampling branch, and the sampling branch comprises a divider resistor, a sampling resistor and a third switch; the sampling branch is connected with a positive power line through a first switch and connected with a negative power line through a second switch. The sampling branch is provided with a first part connected with the first earth impedance in parallel and a second part connected with the second earth impedance in parallel, the first part comprises at least one divider resistor and a sampling resistor, and the second part comprises at least one divider resistor; the third switch is connected in parallel with at least one divider resistor. Therefore, the sampling branch is connected only under the condition of insulation detection, the number of electronic components is small, the circuit structure is simpler, the size of insulation detection equipment can be effectively reduced, and the circuit cost is reduced.
本申请公开了一种绝缘检测电路、方法及设备,可用于电子电路领域,其包括第一开关、第二开关以及采样支路,其中,采样支路包括分压电阻、采样电阻和第三开关;采样支路通过第一开关连接正极功率线,通过第二开关连接负极功率线;采样支路具有与第一对地阻抗并联的第一部分和与第二对地阻抗并联的第二部分,其中,第一部分中包括至少一个分压电阻和采样电阻,第二部分中包括至少一个分压电阻;第三开关与至少一个分压电阻并联。由此,仅在进行绝缘检测的情况下接入采样支路,电子元件数量少,电路结构更简单,可有效减小绝缘检测设备的体积,降低电路成本。
Insulation detection circuit, method and equipment
一种绝缘检测电路、方法及设备
2025-03-11
Patent
Electronic Resource
Chinese
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