Matrix Converter Control Device Using Delay Circuits
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Solution Overview
Problem
The complexity of the control algorithm for matrix converters makes it difficult to control using general-purpose integrated circuits, requiring customized solutions and limiting versatility and efficiency in power conversion systems.
Innovation Solution
A matrix converter control device with multiple delay circuits that adjust pulse width modulation (PWM) signals for switching elements, allowing for flexible timing control and reducing the need for extensive customization, enabling high versatility and efficient power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a matrix converter includes many switching elements to achieve flexible power conversion, then the power conversion capability is improved, but the control algorithm complexity increases making it difficult to control using general purpose integrated circuits
Solution Approach 1:
The control device is segmented into multiple delay circuits, each corresponding to specific logic change timings of PWM signals. This segmentation allows the complex control algorithm to be divided into manageable modular units that can be implemented using standard integrated circuits rather than requiring customized solutions.
Solution Approach 2:
The delay circuits are designed with selectable delay amounts that can be configured based on different commutation patterns. This universality allows the same hardware structure to handle multiple commutation patterns and overlapping waveforms, enabling control using general purpose integrated circuits while maintaining flexible power conversion capability.
2Manufacturing precision
If customized integrated circuits are used to control the matrix converter, then the control precision is improved, but the manufacturing cost and versatility deteriorate
Solution Approach 1:
The delay amount of each delay circuit is made selectable and configurable, allowing the same hardware to adapt to different control requirements. This parameter flexibility maintains control precision for various commutation patterns while using standard integrated circuits, avoiding the need for expensive customized solutions.
3Ease of manufacture
If the control algorithm is simplified to use general purpose integrated circuits, then the ease of manufacture is improved, but the ability to handle various commutation patterns and overlapping waveforms may deteriorate
Solution Approach 1:
The delay circuits incorporate selectable delay amounts that can be dynamically configured based on the required commutation pattern. This dynamic configurability allows standard integrated circuits to adapt to various commutation patterns and overlapping waveforms, maintaining versatility while achieving ease of manufacture through standardized components.
Data Source
AI summary
A matrix converter control device includes a plurality of delay circuits which correspond to logic change timings of a plurality of input pulse width modulation (PWM) signals for controlling ON and OFF states of a plurality of switching elements included in a matrix converter. Specifically, the plurality of delay circuits are a first delay circuit, a second delay circuit, a third delay circuit, a fourth delay circuit, and a fifth delay circuit. Each of the plurality of delay circuits delays an input PWM signal by an amount of delay set for the delay circuit at a logic change timing corresponding to the delay circuit.