Boost Converter Power Limiting Without Full Temperature Sensing

The patent introduces an intermediary measurement approach by measuring the temperatures of only two specific capacitors (first and second capacitors) instead of all capacitors. The controller uses these limited temperature measurements along with output power information to infer the thermal state of other capacitors, thereby preventing overheating without requiring temperature sensors for every capacitor.

The patent creates a thermal model or correspondence relationship that copies the thermal behavior patterns from measured capacitors to unmeasured capacitors. By establishing relationships between capacitor temperatures and output power, the system can estimate temperatures of unmeasured capacitors based on measurements from a subset, reducing the number of required sensors while maintaining reliable overheating prevention.

The patent implements dynamic power limit adjustment by continuously monitoring capacitor temperatures and adapting the output power limit in real-time. When temperatures are low, the system allows operation above continuous rated power (utilizing short-term surge capacity). When temperatures approach thresholds, the system dynamically reduces the power limit to prevent overheating. This creates a dynamic balance between component protection and power output capability.

The patent changes the operating parameter (output power limit) based on temperature conditions. Instead of maintaining a fixed continuous rated power limit, the system adjusts the power limit parameter according to real-time temperature measurements and pre-established temperature-power correspondence relationships, enabling both component protection and efficient utilization of short-term power surge capacity.

The patent uses output power as an intermediary parameter to infer temperatures of unmeasured capacitors. By measuring temperatures of only two capacitors and combining this data with output power information, the system can estimate temperatures of other capacitors through pre-established correspondence relationships, achieving comprehensive temperature monitoring without installing sensors on every capacitor.

The patent makes the measured temperature data and output power information serve multiple functions: directly monitoring measured capacitors, inferring temperatures of unmeasured capacitors through correspondence relationships, and dynamically adjusting power limits. This multi-functional use of limited measurement data achieves comprehensive monitoring with minimal sensors.