Traction motor state monitoring device, traction motor and diesel locomotive

The utility model discloses a state monitoring device of a traction motor, the traction motor and a diesel locomotive. The state monitoring device of the traction motor comprises a detection piece which is electrically connected in a power transmission circuit of the traction motor and is electrically connected with a first communication interface; the execution part is electrically connected in the power transmission circuit and is electrically connected with a second communication interface; and the controller is electrically connected with the first communication interface and the second communication interface, and is used for controlling the execution part to disconnect the power transmission circuit according to a judgment result when the motor state data detected by the detection part is judged to be greater than a preset data threshold value. The technical problems that the structure is complex, and wiring operation of personnel is troublesome are solved. 本申请公开了一种牵引电动机的状态监测装置、牵引电动机及内燃机车。该牵引电动机的状态监测装置包