A power conversion device comprising: a power conversion unit configured to supply a driving AC power to a motor of a controlled object that includes the motor and a movable part driven by the motor; and an abnormality detection unit configured to acquire index information associated with an operation condition of the motor; and detect an abnormality in the controlled object based on the index information acquired; characterized in that the index information includes a value of a first index and a value of a second index associated with the condition of the motor, and wherein the abnormality detection unit includes a first abnormality detection unit configured to detect the abnormality in the controlled object based on a relation between the value of the first index and the value of the second index associated with the condition of the motor; wherein the first abnormality detection unit includes: an upper limit setting unit configured to set an upper limit of a correlation profile representing a change in the second index in response to a change in the first index, a lower limit setting unit configured to set a lower limit of the correlation profile, and a first determination unit configured to determine that there is an abnormality in the controlled object in a case where a combination of a value of the first index and a value of the second index is outside a range between the upper limit and the lower limit of the correlation profile; and wherein the upper limit setting unit and the lower limit setting unit are configured to set the upper limit and the lower limit so that a width of the correlation profile in a fluctuation direction of the second index varies depending on the first index. a power conversion unit configured to supply a driving AC power to a motor of a controlled object that includes the motor and a movable part driven by the motor; and an abnormality detection unit configured to acquire index information associated with an operation condition of the motor; and detect an abnormality in the controlled object based on the index information acquired; the index information includes a value of a first index and a value of a second index associated with the condition of the motor, and wherein the abnormality detection unit includes a first abnormality detection unit configured to detect the abnormality in the controlled object based on a relation between the value of the first index and the value of the second index associated with the condition of the motor; wherein the first abnormality detection unit includes: an upper limit setting unit configured to set an upper limit of a correlation profile representing a change in the second index in response to a change in the first index, a lower limit setting unit configured to set a lower limit of the correlation profile, and a first determination unit configured to determine that there is an abnormality in the controlled object in a case where a combination of a value of the first index and a value of the second index is outside a range between the upper limit and the lower limit of the correlation profile; and wherein the upper limit setting unit and the lower limit setting unit are configured to set the upper limit and the lower limit so that a width of the correlation profile in a fluctuation direction of the second index varies depending on the first index. an upper limit setting unit configured to set an upper limit of a correlation profile representing a change in the second index in response to a change in the first index, a lower limit setting unit configured to set a lower limit of the correlation profile, and a first determination unit configured to determine that there is an abnormality in the controlled object in a case where a combination of a value of the first index and a value of the second index is outside a range between the upper limit and the lower limit of the correlation profile; and wherein the upper limit setting unit and the lower limit setting unit are configured to set the upper limit and the lower limit so that a width of the correlation profile in a fluctuation direction of the second index varies depending on the first index.