Electric Machine Pulsed Control With Ramped Mode Transitions
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Solution Overview
Problem
Conventional electric machines operate inefficiently when subjected to varying load conditions, as they are typically driven continuously without adjusting to their most efficient operating ranges, leading to suboptimal energy conversion efficiency.
Innovation Solution
Implementing pulsed control of electric machines by intermittently modulating their output between different torque levels, using a ramp generator to transition between pulsed and continuous operations, thereby optimizing energy conversion efficiency under varying operational demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electric machines operate continuously under varying load conditions, then they can maintain constant output, but energy conversion efficiency deteriorates
Solution Approach 1:
The patent applies periodic action by implementing pulsed control where the electric machine operates in alternating pulsed and continuous modes. The controller switches between these modes based on operating conditions, creating periodic operation cycles that optimize efficiency while maintaining required output delivery over time
Solution Approach 2:
The patent applies dynamics by making the operating mode adjustable and adaptive. The controller dynamically transitions between pulsed and continuous operation based on real-time operating conditions, allowing the system to adapt its behavior to varying load demands while optimizing energy conversion efficiency
2Object-affected harmful factors
If electric machines operate continuously, then stable output is maintained, but noise, vibration, and harshness increase
Solution Approach 1:
The patent applies periodic action by implementing pulsed control where the electric machine operates in alternating pulsed and continuous modes. The controller switches between these modes based on operating conditions, creating periodic operation cycles that optimize efficiency while maintaining required output delivery over time
Solution Approach 2:
The patent applies intermediary by introducing a ramp generator as a mediating component between the pulsed and continuous operation modes. The ramp generator provides smooth transitions between operating states, preventing abrupt changes that would cause noise and vibration while maintaining operational stability
Data Source
AI summary
An electric machine controller arranged to direct a power converter to cause a pulsed operation of an electric machine in selected operational ranges to deliver a desired output and to cause a continuous operation of the electric machine in selected operational ranges is provided. A ramp generator is adapted to provide a ramping between the pulsed operation and the continuous operation.