Method and system for controlling hybrid electric vehicles

A control system for a hybrid electric vehicle (HEV) comprising:

• a hybrid energy storage system (HESS) having multiple energy sources including a fuel cell, a battery, a supercapacitor, and a photovoltaic panel, wherein each energy source is connected to a DC bus through DC-DC converters, and wherein the DC bus is configured to regulate and distribute power to an induction motor and auxiliary systems of the HEV;
• an inverter and the induction motor, wherein the inverter is configured to convert DC power from the DC bus to alternative current (AC) power for driving the induction motor;
• and
• a controller configured to implement a barrier function adaptive sliding mode control (BFASMC) algorithm, wherein the controller is operatively connected to the DC-DC converters, the inverter, and the induction motor, and wherein the controller is further configured to:
• regulate power distribution among the multiple energy sources of the HESS by dynamically adjusting duty cycles of the DC-DC converters to achieve voltage stability at the DC bus,
• maintain desired speed and torque of the induction motor by controlling induction motor current components in a decoupled vector control framework, wherein the controller modulates d-axis and q-axis current components of a stator of the induction motor,
• adaptively adjust controller gain values in response to real-time load variations of the HEV to reduce control chattering and increase control precision, and
• regulate DC bus voltage and motor speed using a control law derived from a Lyapunov stability criterion to ensure global asymptotic stability of the HEV.

A method of controlling a hybrid electric vehicle (HEV), the method comprising:

• regulating power distribution in a hybrid energy storage system (HESS) having multiple energy sources, including a fuel cell, a battery, a supercapacitor, and a photovoltaic panel, by dynamically adjusting duty cycles of associated direct current (DC)-DC converters to stabilize voltage at a DC bus;
• controlling an induction motor connected to the DC bus through an inverter by applying a space vector pulse width modulation (SVPWM) technique to generate a desired alternative current (AC) output;
• maintaining a desired speed and torque of the induction motor by independently modulating d-axis and q-axis current components of a stator of the induction motor using a decoupled vector control framework;
• and
• implementing a barrier function adaptive sliding mode controller (BFASMC) to:
• adjust controller gain values in real-time in response to varying load conditions,
• mitigate control chattering, and
• adaptively manage energy flow within the HESS based on load conditions and regenerative braking scenarios.