AC Generator Phase Control for Load Voltage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power generating apparatuses with magnet type AC generators face challenges in controlling output to maintain load voltage at a target value due to the inability to control magnetic fields, leading to inefficient power generation and increased costs due to the need for high-performance microprocessors and extensive memory storage for delay phase calculations.
Innovation Solution
A power generating apparatus with an n-phase armature winding and an n-phase voltage source inverter, using voltage and current phase detecting means to control the phase of the control voltage to match the phase of the phase voltage and phase current, eliminating the need for complex delay phase maps and high-performance microprocessors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If delay phase maps and complex calculations are used to control output, then load voltage control precision is improved, but device complexity and microprocessor performance requirements increase
Solution Approach 1:
The patent changes the control parameter from complex delay phase calculations to simple phase angle detection. By detecting the phase angle between voltage and current directly and using this to control the thyristor firing timing, the system achieves accurate load voltage control without requiring complex maps or high-performance microprocessors. This parameter simplification resolves the contradiction between control precision and device complexity.
2Measurement precision
If extensive memory storage is used for delay phase maps, then control accuracy is improved, but cost and device complexity increase
Solution Approach 1:
The patent extracts and eliminates the need for extensive memory storage by removing complex delay phase maps. Instead of storing pre-calculated delay phase data, the system directly detects phase angles and uses them for control. This extraction of unnecessary memory requirements reduces both cost and device complexity while maintaining control accuracy through direct phase angle measurement and control.
3Measurement precision
If high-performance microprocessors are used for complex calculations, then control precision is improved, but cost and device complexity increase
Solution Approach 1:
The patent replaces expensive high-performance microprocessors with simpler, lower-cost control devices. By using direct phase angle detection and simple timing control instead of complex calculations, the system achieves the same control precision with much less computational power. This substitution of high-performance components with simpler alternatives reduces cost and device complexity while maintaining control precision.
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 solution allows for accurate and efficient control of load voltage and power generation, maximizing output while reducing costs and complexity by eliminating the need for extensive memory storage and high-performance processors.
Implementation Method 1
an AC generator (1) having an n-phase (n is an integer equal to or larger than 1) armature winding (103)
Implementation Method 2
apply control voltage having a predetermined phase angle to the armature winding from the voltage accumulating means (2) through the inverter (4)
Data Source
AI summary
A power generating apparatus including an AC generator that supplies electric power to a load including a voltage accumulating means, an inverter that applies AC control voltage to armature winding of the generator from the voltage accumulating means, and a controller that controls a phase of control voltage applied to the armature winding by the inverter to keep load voltage at a target value, wherein the phase of the control voltage is controlled so as to advance when the load voltage is higher than the target value, hold the present phase when the load voltage is equal to the target value, advance when the load voltage is lower than the target value and a phase of phase voltage of the generator is delayed behind a phase of a phase current of the same phase, and delay when the load voltage is lower than the target value and the phase of the phase voltage of the generator is advanced ahead of a phase of a phase current of the same phase.