INVERTER SYSTEM
First Claim
1. A current detection circuit of an inverter that converts DC input into AC output and supplies the AC output to a load, comprising:
- a current detection part that detects change in a circuit current of said inverter through the medium of the magnetic flux change due to the change of said circuit current caused by discharge.
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Abstract
An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
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Citations
22 Claims
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1. A current detection circuit of an inverter that converts DC input into AC output and supplies the AC output to a load, comprising:
a current detection part that detects change in a circuit current of said inverter through the medium of the magnetic flux change due to the change of said circuit current caused by discharge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An anomaly detection circuit of an inverter that converts DC input into AC output and supplies the AC output to a load, comprising:
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a current detection part that detects change in a circuit current of said inverter through the medium of the magnetic flux change due to the change in said circuit current caused by discharge; and
a detection signal output part that, based on a result of a detection of said current detection part, outputs a detection signal representative of whether or not anomaly exists in a current route including said load. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A test method using an inverter that converts DC input into AC output and supplies the AC output to a load, comprising:
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a step that detects change in a circuit current of said inverter through the medium of the magnetic flux change due to the change in said circuit current caused by discharge; and
a step that decides based on a result of a detection of the change in said circuit current whether or not anomaly exists in a current route including said load.
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22. A test device comprising:
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an inverter that converts DC input into AC output and supplies the AC output to a load; and
a current detection part that detects change in a circuit current of said inverter through the medium of the magnetic flux change due to the change in said circuit current caused by discharge, wherein whether or not anomaly exists in a current route including said load is decided based on a result of a detection of said current detection part.
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Specification