Electronic expansion valve with self-checking function

The utility model provides an electronic expansion valve with a self-checking function, which comprises a rotor comprising a permanent magnet, and the permanent magnet comprises at least one pair of magnetic poles; the stator comprises a coil, and the coil is arranged on the periphery of the permanent magnet; the first circuit board is electrically connected with the coil; the sensor is arranged on the periphery of the permanent magnet, and the sensor is used for sensing the magnetic pole change of the permanent magnet; and the second circuit board is arranged at the periphery of the permanent magnet and is used for fixing a sensor and electrically connecting the sensor with the first circuit board. Compared with the prior art, the coil is additionally provided with the second circuit board, the sensor is fixed on the second circuit board, and the sensor and the first circuit board are designed separately, so that the structure of the coil can be more flexible and changeable, and various arrangement requireme