Anti-Parameter Perturbation Junction Temperature Balance Model Predictive Control for Power Amplifiers with High Reliability

In the application scenario of active marine exploration, digital power amplifiers are used to drive electroacoustic transducers to generate acoustic waves. Digital power amplifiers with full-bridge parallel inverter topology suffer from the junction temperature imbalance. Therefore, this paper proposes the anti-parameter perturbation junction temperature balance model predictive control (APPJTB-MPC) to balance the junction temperature of power devices for various operating conditions with the inductance parameter perturbation. When the bridge arm inductance parameters are not perturbed, the maximum junction temperature difference of the power devices is less than 0.65℃ during the full modulation range. When the bridge inductor parameter perturbation is extremely severe, the maximum junction temperature difference of the power devices is only 1.23℃.