US 12,459,366 B2
Failure prediction system, failure prediction method, and failure prediction program
Masaaki Kuranuki, Kyoto (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 18/579,933
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jun. 30, 2022, PCT No. PCT/JP2022/026185
§ 371(c)(1), (2) Date Jan. 17, 2024,
PCT Pub. No. WO2023/008082, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 2021-121662 (JP), filed on Jul. 26, 2021.
Prior Publication US 2024/0351442 A1, Oct. 24, 2024
Int. Cl. B60L 3/00 (2019.01); B60L 3/12 (2006.01)
CPC B60L 3/0061 (2013.01) [B60L 3/12 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2240/427 (2013.01); B60L 2240/429 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A failure prediction system comprising:
acquirer acquiring driving data items of an electrically-powered moving body; and
a predictor predicting, based on the driving data items of the electrically-powered moving body, an aging failure of an electromechanical transducer including a motor driving a driving wheel of the electrically-powered moving body and a drive circuit driving the motor, wherein
the driving data items each include an input voltage of the drive circuit, an input current of the drive circuit, a rotational speed of the motor driven by the drive circuit, and a rotational torque of the motor, and
the predictor predicts the aging failure of the electromechanical transducer based on a change of a value statistically representing a relationship between an input electric power of the drive circuit and a shaft output power of the motor, the input electric power of the drive circuit being obtained based on the input voltage and the input current of the drive circuit, and the shaft output power of the motor being obtained based on the rotational speed and the rotational torque of the motor.