Inverter Switch Transition Timing Control
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Solution Overview
Problem
The complexity of managing conduction/de-conduction times in inverters for aircraft fan motors due to various power components and control laws, leading to design errors and electromagnetic pollution, is a significant challenge.
Innovation Solution
A method for controlling an inverter that generates specific digital signals to manage switch transitions based on rotor position, delaying execution to avoid violations in conduction/de-conduction times, allowing for reliable and robust management of motor position changes and easy implementation of new control laws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If switching orders are generated without considering switch transition times, then control law implementation is simpler, but switch damage and electromagnetic pollution occur
Solution Approach 1:
The control module checks the timing of switching orders against the actual transition times of switches before executing the control law. By performing this verification in advance, the system prevents switching orders that would cause switch damage or electromagnetic pollution, while maintaining relatively simple control law implementation.
2Object-affected harmful factors
If switch transition times are strictly managed, then electromagnetic pollution is reduced, but control system complexity increases
Solution Approach 1:
The control module continuously monitors the actual transition times of switches and uses this feedback to adjust and optimize the timing of switching orders. This feedback mechanism ensures that switching operations respect the physical constraints of the switches, thereby reducing electromagnetic pollution while keeping the control system relatively simple through adaptive optimization.
3Reliability
If control laws are customized for specific switch references, then switching performance is optimized, but adaptability to different configurations decreases
Solution Approach 1:
The control module stores transition time parameters for different switch references and dynamically selects and adjusts these parameters based on the actual switch configuration. This allows the system to optimize switching performance for each specific switch reference while maintaining adaptability to different configurations through parameterization rather than hard-coded control laws.
Data Source
AI summary
A method for controlling an inverter configured to power electrically a motor including a stator and a rotor capable of being rotated relative to the stator when the motor is electrically powered, the inverter including a plurality of switches suitable for being controlled to open/close in order to regulate the power supply of the motor, each switch having a predetermined transition time from a closed state to an open state, and a predetermined transition time from the open state to the closed state, wherein the method includes the step of not generating the command to open and close the switches when this violates the predetermined transition times from a closed state to an open state, and the predetermined transition times from the open state to the closed state.