Insulation detection method and apparatus for conversion system
AssigneeDelta Electronics (Shanghai) Co., Ltd.
InventorsDehui Zhang, Teng Liu
Life of this patent
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Abstract
The application discloses an insulation detection method and apparatus for a conversion system, the conversion system including: a converter module including n conversion units, where n≥1, each of the n conversion units including a transformer including a primary winding and a secondary winding; and a connection element connected between the primary winding and the secondary winding of the transformer; the insulation detection method including: controlling at least one switch of the converter module to turn on; detecting signals that reflect a current flowing through the connection element; and processing the signal and outputting insulation information, wherein the insulation information represents an insulation state of the conversion system.
Claims23
An insulation detection method for a conversion system, the conversion system comprising:
- a converter module comprising n conversion units, where n≥1, each of the n conversion units comprising a power conversion circuit, the power conversion circuit comprising at least a power switching device and a transformer comprising a primary winding and a secondary winding;
- and
- a connection element comprising a first end electrically connected to a first port of the converter module and a second end electrically connected to a second port of the converter module;
- the insulation detection method comprising:
- turning on at least one power switching device of the converter module to form a low impedance detection circuit via the connection element;
- detecting signals that reflect a current flowing through the connection element;
- and
- processing the signals and outputting insulation information, wherein the insulation information represents an insulation state of the conversion system.
An insulation detection apparatus for a conversion system, the conversion system comprising:
- a converter module comprising n conversion units, where n≥1, each of the n conversion units comprising a power conversion circuit, the power conversion circuit comprising at least a power switching device and a transformer comprising a primary winding and a secondary winding;
- and
- a connection element comprising a first end electrically connected to a first port of the converter module and a second end electrically connected to a second port of the converter module;
- the insulation detection apparatus comprising:
- a controller connected to the converter module for controlling at least one power switching device of the converter module to be turned on to form a low impedance detection circuit via the connection element;
- a first insulation detection unit sleeved onto the connection element and connected to the control unit for detecting signals that reflect a current flowing through the connection element;
- and
- a processing circuit connected to the first insulation detection unit for processing the signals and outputting insulation information, wherein the insulation information represents an insulation state of the conversion system.
Dependencies are inferred from the claim text.