Control method and system for hybrid power system

A system for controlling a hybrid power system, wherein the system is applied to the hybrid power system comprising an engine and a motor;

• the motor comprises a motor rotor, a motor stator, and a motor controller;
• an output shaft of the engine is connected to a center shaft of the motor rotor, two ends of the center shaft of the motor rotor are respectively connected to two motor bearings, and the motor rotor is supported by the two motor bearings;
• the motor controller is connected to the motor stator to provide a driving current for the motor stator;
• the motor stator is connected to a driving shaft of a motor vehicle through a transmission mechanism, so that the motor stator is driven to rotate when the driving shaft rotates;
• the motor is configured to determine an output torque according to a rotation speed of the motor, and transmit the output torque to the driving shaft;
• the rotation speed of the motor is equal to a difference between a rotation speed of the motor rotor and a rotation speed of the motor stator;
• wherein the system for controlling the hybrid power system comprises:
• a first parameter obtaining module configured to obtain operating parameters of the hybrid power system, wherein the operating parameters of the hybrid power system comprises a rotation speed of the engine, the rotation speed of the motor, a net output torque of the engine and a torque of the motor, the rotation speed of the motor is equal to a difference between the rotation speed of the motor rotor and the rotation speed of the motor stator;
• a second parameter obtaining module configured to obtain operating parameters of the motor vehicle, wherein the operating parameters of the motor vehicle comprises a rotation speed of the driving shaft, a resistance torque of the motor vehicle, and an acceleration torque of the motor vehicle;
• a motor control module configured to control, according to the operating parameters of the hybrid power system and the operating parameters of the motor vehicle, the motor controller to provide a driving signal for the motor stator, so that operating parameters of the motor satisfy a first preset formula;
• wherein the first preset formula is
• {
• n
• V
• ⁢
• e
• ⁢
• h
• =
• n
• E
• ⁢
• n
• ⁢
• g
• -
• n
• T
• ⁢
• M
• T
• V
• ⁢
• e
• ⁢
• h
• +
• T
• a
• =
• T
• E
• ⁢
• n
• ⁢
• g
• =
• T
• T
• ⁢
• M
• ⁡
• [
• [
• ;
• ]
• ]
• ,
• wherein
• nVeh is the rotation speed of the driving shaft;
• nEng is the rotation speed of the engine;
• nTM is the rotation speed of the motor;
• TVeh is the resistance torque of the motor vehicle;
• Tα is the acceleration torque of the motor vehicle;
• TEng is the net output torque of the engine;
• TTM is the torque of the motor.