Dual Rectifier PMSG Voltage Regulation Across Extended Speed Range
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Solution Overview
Problem
Existing permanent magnet synchronous generators (PMSGs) face challenges in effectively regulating voltage output over extended speed ranges, particularly due to the dependence of output voltage on rotational speed and the lack of efficient switching mechanisms between different rectifier bridges.
Innovation Solution
The implementation of a dual rectifier bridge system with high and low speed rectifier bridges, coupled with a control coil converter, allows for dynamic switching based on rotational speed, enabling improved voltage regulation across varying rotational speeds by utilizing different numbers of stator winding turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed number of turns in stator windings is used, then the device complexity is reduced, but voltage regulation performance deteriorates over extended speed ranges
Solution Approach 1:
The stator winding is divided into multiple sections with different numbers of turns (first section with first number of turns, second section with second number of turns). The system segments the rectification function into low speed rectifier bridge and high speed rectifier bridge, each handling different speed ranges. This segmentation allows voltage regulation across extended speed ranges while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
The system dynamically switches between different winding sections and rectifier bridges based on rotational speed. The control system activates appropriate circuit breakers to connect either the first or second section to the rectifier bridge, enabling adaptive voltage regulation as speed changes. This dynamic reconfiguration resolves the contradiction by making the system flexible without requiring complete redesign for each speed range.
2Adaptability or versatility
If multiple rectifier bridges are used for different speed ranges, then voltage regulation improves, but device complexity increases
Solution Approach 1:
Both the low speed rectifier bridge and high speed rectifier bridge are designed with identical circuit topology and structure. This universal design allows the system to handle different speed ranges using the same basic rectification circuit, reducing the need for completely different designs for each speed range. The multi-functionality of identical circuits resolves the complexity issue while maintaining adaptability.
Solution Approach 2:
The rectification system is segmented into multiple independent rectifier bridges, each optimized for specific speed ranges. Rather than using a single complex rectifier that must handle all speeds, the system divides the rectification function across multiple simpler units that can be selectively activated. This segmentation maintains voltage regulation performance while keeping individual components manageable in complexity.
3Adaptability or versatility
If stator windings are configured with different numbers of turns, then voltage output adaptability improves, but manufacturing precision requirements increase
Solution Approach 1:
Different sections of the stator winding are designed with locally optimized turn counts (first section with first number of turns, second section with second number of turns) to match specific speed ranges. Each local section is optimized for its intended operating condition rather than requiring uniform precision across the entire winding. This local quality approach improves voltage adaptability while making manufacturing precision requirements more manageable by localizing the precision needs to specific sections.
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 approach enhances voltage regulation capabilities, allowing for stable power output across a broader range of rotational speeds, thereby improving the efficiency and adaptability of the electrical power system.
Implementation Method 1
A permanent magnet synchronous generator (PMSG) may be used to generate electric power for an electronic power system (EPS). A PMSG typically includes three stator windings and a rotor with permanent magnets (PMs) to generate a single three-phase voltage.
Implementation Method 2
The three-phase voltage may be outputted to a rectifier for conversion to a DC voltage. the low speed rectifier bridge is configured to receive the first AC power, and the high speed rectifier bridge is configured to receive the second AC power.
Data Source
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AI summary
An electric power system (EPS) (100) may comprise a permanent magnet synchronous generator (PMSG) (120), a high speed rectifier (140) configured to receive a first alternating current (AC) power from the PMSG (120), and a low speed rectifier (130) configured to receive a second AC power from the PMSG (120). The low speed rectifier (130) may be configured to receive the first AC power in response to the PMSG (120) rotating at a first rotational speed, and the high speed rectifier (140) may be configured to receive the second AC power in response to the PMSG (120) rotating at a second faster rotational speed.