Inverter N line detection control circuit and method thereof
The embodiment of the invention discloses an inverter N line detection control circuit and a method thereof. The circuit comprises a sampling module used for collecting three-phase voltage; the filtering module is connected among the L1 line, the L2 line, the L3 line and the N line of the three-phas...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
29.09.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The embodiment of the invention discloses an inverter N line detection control circuit and a method thereof. The circuit comprises a sampling module used for collecting three-phase voltage; the filtering module is connected among the L1 line, the L2 line, the L3 line and the N line of the three-phase inverter; the controlled module is connected between any one of the L1 line, the L2 line and the L3 line and the N line, and when the controlled module is conducted, the X capacitance capacity of the line connected with the controlled module to the N line is larger than the X capacitance capacities of the other two lines to the N line respectively; and the control module is configured to control the controlled module to be switched on or switched off according to the output mode, and judges whether the N line is connected to the power grid or not by comparing the phase angle difference value of the three-phase voltage with a preset angle range. According to the invention, the capacitance capacity of any one line |
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Bibliography: | Application Number: CN202311091445 |