Outdoor Fan Startup Control During Bootstrap Capacitor Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing motor starting control technologies for outdoor fans in air conditioners suffer from a low motor starting success rate due to the initial starting working conditions differing from the detected conditions before the bootstrap capacitor is charged, leading to motor starting failures.
Innovation Solution
A method and system that involves real-time detection of the motor's initial rotating state during the charging of the bootstrap capacitor, allowing for corresponding control of the motor startup based on the detected state, thereby improving the starting success rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time detection of motor rotating state is performed during bootstrap capacitor charging, then motor starting success rate is improved, but detection precision requirements increase
Solution Approach 1:
The patent performs detection of the motor's rotating state during the charging process of the bootstrap capacitor, before the motor starting control is executed. This preliminary detection allows the system to identify the initial rotating state (forward rotation, counter rotation, or stillness) and prepare appropriate starting strategies in advance, ensuring accurate detection and reliable starting without requiring enhanced detection precision during critical starting moments.
2Loss of time
If real-time detection is performed during capacitor charging, then starting time is reduced, but control complexity increases
Solution Approach 1:
The patent merges the detection function and control function into an integrated control system. The same control unit that manages the bootstrap capacitor charging also performs the rotating state detection and determines the starting strategy. This integration avoids the need for separate detection hardware and processing units, reducing overall system complexity while enabling real-time detection during the charging phase and minimizing starting time.
Data Source
AI summary
An air conditioner and a startup control method and system for an outdoor fan of the air conditioner. While in a process of charging a bootstrap capacitor in an actuator of a motor of the outdoor fan, an initial rotation state of the motor is detected in real time, and, when charging of the bootstrap capacitor is completed, startup of the motor is correspondingly controlled on the basis of the detected initial rotation state. This allows real time initial startup work state to be acquired when charging of the bootstrap capacitor is completed, thus allowing the motor to be started smoothly, increasing the success rate in starting the motor, and solving the problem of low success rate in starting the motor of an outdoor fan.