Regulator Accumulator Limits Input Voltage Distortion
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Solution Overview
Problem
Fully regenerative power systems often experience input voltage distortion and are costly due to the need for bulky line reactors to mitigate this distortion, and they provide more regeneration capability than required for many applications, making them inefficient for applications needing limited regeneration.
Innovation Solution
A system and method that includes a regulator with an integrated accumulator to limit input voltage by determining error values from input power feedback and references, and using these errors to adjust torque references, thereby controlling regenerative power and preventing DC bus overvoltage faults without the need for line reactors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If line reactors are used to reduce input voltage distortion in regenerative systems, then voltage distortion is reduced, but system size and cost increase
Solution Approach 1:
The patent extracts and removes the line reactors from the system by implementing an active front end with controlled switching devices that actively manage regenerative current without requiring passive filtering components. This eliminates the bulky line reactors while maintaining voltage distortion reduction.
Solution Approach 2:
The patent replaces the passive mechanical/electrical filtering approach (line reactors) with an active electronic control system using switching devices and pulse width modulation to achieve the same voltage distortion reduction function without the physical bulk of reactors.
2Object-affected harmful factors
If line reactors are used to reduce input voltage distortion, then voltage distortion is reduced, but system cost increases
Solution Approach 1:
The patent removes the expensive line reactor components from the system architecture, replacing them with control electronics that are more cost-effective while achieving the same voltage distortion mitigation function.
Solution Approach 2:
The patent substitutes expensive passive line reactor components with more economical active electronic control systems using switching devices and microcontroller-based regulation.
3Adaptability or versatility
If fully regenerative systems are used, then regeneration capability is maximized, but system cost and complexity increase for applications requiring limited regeneration
Solution Approach 1:
The patent implements a dynamic configuration where the regenerative system can adapt its operation mode based on detected DC bus voltage conditions, transitioning between full regenerative mode and limited regeneration mode to match actual application requirements and reduce unnecessary complexity.
Solution Approach 2:
The patent changes the operational parameters of the regenerative system by detecting DC bus voltage levels and adjusting the regenerative current flow accordingly, enabling the system to operate in different regeneration modes (full or limited) based on real-time conditions.
Data Source
AI summary
A system and method for limiting input voltage to a power delivery system having regeneration capability. According to various embodiments, the system includes a regulator having a multiple input variables and at least one output variable; and an accumulator in communication with the regulator wherein the accumulator presets the output of the regulator to facilitate a quick output as well as accumulates error values related to the multiple input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated values.