Three-Phase Inverter Control With Variable Gain for Lower Power Loss

The patent applies dynamics by making the gain k variable rather than fixed. The control device dynamically adjusts the gain k based on real-time operating conditions (output active power, output reactive power, DC voltage) to optimize conversion efficiency. This resolves the contradiction by allowing the system to achieve both adequate output voltage amplitude and minimized power loss through adaptive control.

The patent changes the parameter k from a fixed value (0.5) to a variable parameter determined by optimization calculations. By calculating the optimal gain k that minimizes conversion loss based on current operating conditions, the system can simultaneously maintain required output voltage amplitude while reducing power loss, thus resolving the technical contradiction.

The patent extracts only the essential computational elements needed for optimization. Instead of implementing full third harmonic wave superimposition calculations, the invention extracts and applies only the necessary gain optimization calculation based on output power and DC voltage, significantly reducing computation complexity while still achieving power loss minimization.

The patent performs preliminary calculation of the optimal gain k using pre-established optimization criteria and stored characteristics. By calculating the optimal gain in advance based on current operating conditions and storing it for immediate application, the system avoids complex real-time computations during normal operation, thus reducing computational complexity while maintaining efficiency optimization.