Power Supply Voltage Waveform Calculation for Motor Circuit Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for calculating power supply voltage waveforms in circuit coupled magnetic field analysis require trial and error, leading to lengthy calculation times and incomplete solutions, as they primarily focus on coil line voltage calculations without determining the power supply voltage waveform, and existing acceleration methods like TP-EEC still require significant time to reach a steady-state solution.
Innovation Solution
A method involving steps to read input data, perform transient magnetic field analysis with coil current waveform as a given condition, calculate basic loop voltage, and subsequently determine the power supply voltage waveform, along with using initial coil current waveform values for faster convergence in circuit coupled magnetic field analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If trial and error method is used to adjust power supply voltage waveform amplitude and phase, then desired coil current waveform can be obtained, but calculation time becomes extremely long requiring several days for three-dimensional analysis
Solution Approach 1:
The patent performs a preliminary transient magnetic field analysis to calculate the coil induced voltage waveform and basic loop voltage waveform before the final circuit coupled magnetic field analysis. This preliminary calculation provides initial values for amplitude and phase that are close to the target, eliminating the need for multiple trial-and-error iterations and reducing calculation time from several days to a much shorter duration.
Solution Approach 2:
The patent uses the calculated coil induced voltage waveform and basic loop voltage waveform as feedback to determine the power supply voltage waveform parameters. By incorporating this feedback information from the transient analysis into the final analysis, the method achieves accurate coil current waveform in a single calculation rather than through repeated trials.
2Measurement precision
If transient analysis with many steps is performed to reach steady-state solution, then accurate coil current waveform is obtained, but calculation time extends to several days for three-dimensional analysis
Solution Approach 1:
The patent performs a preliminary transient magnetic field analysis to obtain the coil induced voltage waveform, which serves as an initial approximation for the steady-state solution. This preliminary action provides a starting point that is already close to the target steady-state, allowing the final circuit coupled magnetic field analysis to converge much faster without requiring hundreds of transient analysis steps.
Solution Approach 2:
The patent skips the lengthy transient analysis process by directly calculating the power supply voltage waveform using the coil induced voltage waveform and basic loop voltage waveform from a preliminary transient analysis. This allows the method to rush through to the steady-state solution in a single circuit coupled magnetic field analysis rather than gradually converging through hundreds of transient steps.
3Productivity
If coil induced voltage waveform is calculated by backward difference of average magnetic vector potential, then coil line voltage waveform can be obtained, but complete power supply voltage waveform calculation is not achieved
Solution Approach 1:
The patent merges the coil induced voltage waveform calculation with the basic loop voltage waveform calculation by using the same transient magnetic field analysis results. Both waveforms are derived from the same magnetic vector potential data, and their combination provides complete power supply voltage waveform information including both magnitude and phase, achieving both efficiency and completeness.
Solution Approach 2:
The patent makes the transient magnetic field analysis serve multiple functions by using it to calculate both the coil induced voltage waveform and the basic loop voltage waveform. This multi-functional approach eliminates the need for separate calculations and ensures that all necessary information for complete power supply voltage waveform determination is obtained from a single analysis.
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 allows direct calculation of power supply voltage waveforms for desired coil current waveforms, significantly reducing analysis time and design development costs by enabling faster convergence to steady-state solutions in motor design processes.
Implementation Method 1
a coil induced voltage waveform is calculated by a backward difference of an average magnetic vector potential based on a magnetic field analysis
Data Source
AI summary
In the present invention, in an electromagnetic device that uses a coil current, such as a motor, an initial value of a desired coil current waveform is inputted, a magnetic field analysis is performed for the electromagnetic device, a power supply voltage waveform which is derived from a magnetic vector potential acquired from the analysis is calculated, and a circuit coupled magnetic field analysis is performed by using a fundamental waveform component of the calculated power supply voltage waveform, thereby providing a power supply voltage waveform calculation method and a circuit coupled magnetic field analysis method for obtaining a steady solution more quickly than in the conventional technique.