Thyristor AC-DC Converter Circuit With Shared Power Supply
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Solution Overview
Problem
AC-DC converters with thyristors face challenges due to the complex structure and significant cost of power supply circuits required to power each thyristor.
Innovation Solution
The proposed solution involves an AC-DC converter design that includes a first thyristor and two power supply circuits, one delivering a reference voltage between specific nodes and the other including a rectifying element and a capacitor connected to the thyristor, optimizing the power supply structure and reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate power supply circuit is provided for each thyristor, then the thyristor can be properly powered and controlled, but the circuit structure becomes complex and occupies significant surface area
Solution Approach 1:
The patent merges multiple power supply circuits into a single shared power supply circuit that serves multiple thyristors. The power supply circuit includes a power supply unit and a switching unit that can distribute power to different thyristors as needed, eliminating the need for separate power supply circuits for each thyristor and reducing overall circuit complexity
Solution Approach 2:
The power supply circuit is designed with multi-functionality to serve multiple thyristors through a switching mechanism. The switching unit can connect the power supply unit to different thyristors based on their control needs, making the power supply circuit universal rather than dedicated to a single thyristor
2Reliability
If a separate power supply circuit is provided for each thyristor, then each thyristor receives dedicated power, but the converter occupies significant surface area
Solution Approach 1:
Multiple power supply circuits are merged into one shared power supply circuit that can serve multiple thyristors. This consolidation significantly reduces the total surface area required for power supply components while maintaining the ability to properly control each thyristor through the switching unit
3Ease of operation
If separate power supply circuits are used for each thyristor, then each thyristor can be independently controlled, but the manufacturing cost increases significantly
Solution Approach 1:
The patent combines multiple separate power supply circuits into a single shared power supply circuit with a switching unit. This merger reduces the total number of power supply components needed, thereby lowering manufacturing costs while preserving the ability to independently control each thyristor through the switching mechanism
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
This design simplifies the power supply circuitry, reduces surface area occupation, and lowers manufacturing costs while maintaining effective thyristor operation in AC-DC converters.
Implementation Method 1
the second power supply circuit comprising a first rectifying element coupled to the second node of the first power supply circuit and coupled to the third node
Implementation Method 2
the second power supply circuit comprises a first capacitor comprising a first electrode connected to the cathode of the first thyristor
Data Source
AI summary
The present description concerns a converter comprising an AC-DC conversion stage comprising a first thyristor, a first power supply circuit delivering a first reference voltage between a first node and a second node, and a second power supply circuit delivering a second reference voltage between third and fourth nodes, the cathode of the first thyristor being coupled to the first node of the first power supply circuit by a first switch and being connected to the fourth node, the second power supply circuit comprising a first rectifying element coupled to the second node of the first power supply circuit and coupled to the third node.