US 12,249,945 B2
Control method, device, power system and electric vehicle
Xiaojian Huang, Ningde (CN); Zhimin Dan, Ningde (CN); Xianxi Pan, Ningde (CN); and Xiyang Zuo, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 20, 2022, as Appl. No. 18/085,490.
Application 18/085,490 is a continuation of application No. PCT/CN2021/114980, filed on Aug. 27, 2021.
Claims priority of application No. 202011554389.6 (CN), filed on Dec. 24, 2020.
Prior Publication US 2023/0130303 A1, Apr. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02P 27/06 (2006.01); H02P 21/14 (2016.01); H02P 29/68 (2016.01); B60L 58/10 (2019.01)
CPC H02P 29/68 (2016.02) [H02P 21/14 (2013.01); H02P 27/06 (2013.01); B60L 58/10 (2019.02)] 7 Claims
OG exemplary drawing
 
1. A control method being applied to a power system, wherein the power system comprises a power battery, a motor, and an inverter, the method comprising:
obtaining a battery cell temperature of the power battery; and
sending a first control signal to the inverter when the battery cell temperature of the power battery satisfies a preset heating condition for the power battery;
wherein the first control signal is configured to control the inverter to convert an electricity provided by the power battery into an alternating current with a randomly changing frequency, and the alternating current with the randomly changing frequency is configured to supply power to the motor;
wherein before the sending the first control signal, the method further comprises:
randomly generating a plurality of set frequencies, and determining a duration of each of the plurality of set frequencies according to each of the plurality of set frequencies;
determining a reference value sequence of a d-axis component according to the plurality of set frequencies and the duration of each of the plurality of set frequencies, and setting a reference signal sequence of a q-axis component as a null sequence; and
generating the first control signal according to the reference value sequence of the d-axis component, the reference value sequence of the q-axis component, and motor parameters of the motor.