MDSVM Circuit Topology for Individual Coil Current Control
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Solution Overview
Problem
Existing space vector modulation systems face challenges in controlling the current intensity and direction for multiple magnetic field generation coils due to complexity and the need for a large number of switches, especially when controlling passive and active loads, which affects accuracy and efficiency.
Innovation Solution
A multidimensional space vector modulation circuit (MDSVM) that combines full-bridge circuit characteristics with a novel configuration, utilizing N electronic components and N+1 logic control circuits to form a neutral point, reducing the number of switches required and allowing for individual control of voltage states across each component, thereby simplifying control and saving switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full-bridge circuit is used to control each magnetic field generating coil, then the controllability and accuracy of current intensity and direction are improved, but the number of switches increases to 4N and the control complexity increases
Solution Approach 1:
The patent merges N half-bridge circuits into a unified MDSVM circuit structure where N electronic components are coupled to form a neutral point, and N+1 logic control circuits share common switches. This combining approach maintains the individual controllability of each coil while reducing the total switch count from 4N to 2N+2, thereby reducing control complexity while preserving current control accuracy.
Solution Approach 2:
The N+1 logic control circuits in the MDSVM circuit serve multiple functions simultaneously. Each logic control circuit can control multiple electronic components through shared switches, and the circuits work together to generate multidimensional space vectors. This multi-functionality allows a reduced number of switches to achieve the same control capability that would otherwise require more switches in traditional full-bridge configurations.
2Ease of operation
If a full-bridge circuit is used to control N magnetic field generating coils, then the individual control of current intensity and direction is improved, but the number of switches increases to 4N which is more than the 2N+2 in half-bridge circuit
Solution Approach 1:
The patent combines N half-bridge circuits into an integrated MDSVM structure where electronic components are coupled at a common neutral point and logic control circuits share switches. This merging reduces the total switch quantity from 4N in separate full-bridge circuits to 2N+2 in the integrated structure, while maintaining individual control capability through the multidimensional space vector modulation technique.
Solution Approach 2:
The patent introduces the concept of multidimensional space vectors to control N electronic components. By using N+1 logic control circuits that can independently control switches and combine their effects in a multidimensional space, the system achieves individual control of each electronic component with fewer switches. The dimensionality approach allows efficient control where each logic control circuit contributes to multiple components simultaneously.
3Quantity of substance
If a half-bridge circuit is used to control magnetic field generating coils, then the number of switches is reduced to 2N+2, but the controllability and accuracy of current intensity and direction are worsened due to interference from other electrical loads
Solution Approach 1:
The patent merges N half-bridge circuits into a unified MDSVM structure with N electronic components coupled to form a neutral point and N+1 logic control circuits. This merging enhances control accuracy by providing centralized management and coordinated control of all switches, eliminating the interference problems that occur in isolated half-bridge circuits while maintaining the reduced switch count of 2N+2.
Solution Approach 2:
The MDSVM circuit implements feedback control through its N+1 logic control circuits that monitor and coordinate the switching states. The system calculates reference voltages and compares them with actual states, adjusting switch control signals to maintain accurate current control. This feedback mechanism ensures that the reduced number of switches does not compromise control accuracy, as the coordinated control compensates for the reduced hardware redundancy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The MDSVM circuit enables efficient and accurate control of magnetic fields and voltage states across multiple components, reducing the complexity of switch management and allowing for the modulation of both passive and active loads, including magnetic field generation and power supplies.
Implementation Method 1
Each of the logic control circuits has at least two switches coupled in series; each of the electronic components is individually coupled between the two switches of the logic control circuits
Implementation Method 2
The electronic components have coils, and when current flows through the coils, each of the electronic components generates a magnetic field
Data Source
AI summary
This patent presents a multidimensional space vector modulation (MDSVM) circuit formed by coupling a half-bridge logic control circuit not directly coupled to electronic components with at least three half-bridge logic control circuits coupled to electronic components. The half-bridge logic control circuit not directly coupled with any electronic components can form a full-bridge circuit with any other half-bridge logic control circuit coupled with electronic components. Therefore, users can further control the voltage difference between both ends of each electronic component separately and then individually control the strength and direction of current flowing through each electronic component and solving the problem of control attributed to the complexity of prior art.