Electric Machine Phase Correction for Power Input Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric machines face challenges in precisely detecting the position of the rotator and controlling electric power input timing, leading to inefficiencies and potential wasteful power consumption due to deviations in timing alignment.
Innovation Solution
An electric machine system with a control unit that corrects the phase of electric power signals to optimize input and output timing, using a correction unit to adjust the phase so that electric power magnitude approaches an extreme value, such as a minimum or maximum, thereby minimizing losses and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position of the rotator is detected using hysteresis properties of the motor, then the position detection can be implemented, but the detection precision is insufficient leading to timing deviations
Solution Approach 1:
The patent implements a feedback mechanism where the detected rotator position information is fed back to the control unit, which then adjusts the power input timing accordingly. This closed-loop feedback system compensates for detection inaccuracies by continuously optimizing the power input timing based on actual rotator position, thereby resolving the contradiction between using simple hysteresis-based detection and maintaining energy efficiency.
Solution Approach 2:
The patent changes the control parameter from fixed timing based solely on hysteresis detection to variable timing that adjusts according to detected rotator position. By making the power input timing a variable parameter that responds to position feedback, the system optimizes energy efficiency despite using relatively simple position detection methods.
2Productivity
If the power input timing is controlled based on detected rotator position, then performance can be optimized, but timing deviations still occur causing wasteful power consumption
Solution Approach 1:
The control unit uses feedback from rotator position detection to continuously adjust power input timing. This feedback loop ensures that power is input at the optimal moment corresponding to the rotator's actual position, preventing timing deviations and eliminating wasteful power consumption while maintaining high performance.
Solution Approach 2:
The patent transitions from static, fixed power input timing to dynamic timing that adapts to the rotator's real-time position. This dynamic adjustment mechanism allows the system to optimize performance and minimize energy waste by continuously synchronizing power input with the rotator's actual state.
Data Source
AI summary
An electric machine system includes an electric machine, an electric power converter, and a control unit. The electric machine includes a stator that includes coils, and a rotator that includes a magnet and is rotatable with respect to the stator. The electric power converter inputs electric power with respect to the coils of the electric machine. The control unit controls the electric power converter. The control unit includes an output unit and a correction unit. The output unit outputs a control signal for operating the electric power converter to the electric power converter. The correction unit corrects a phase of the control signal that determines input timing of the electric power with respect to the coils of the electric machine. The correction unit corrects the phase so that the magnitude of the electric power approaches an extreme value.