Energy Distribution Control for Electrical Loads

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Solution Overview

Problem

Existing energy distribution methods for electrical loads during a modulation period are either slow to converge to a regular distribution or achieve suboptimal results, despite efforts to improve upon systems like the '483' method and EP 0 710 051.

Innovation Solution

A method that determines energy distribution based on a refined criterion considering the temporal length and power of electrical signals, with a classification step to prioritize signals and iterative distribution adjustments to optimize power distribution, using a calculator and switch control system with thyristors for efficient power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the modulation period is divided into equal time intervals with rising edges transmitted at the beginning of each interval, then a regular temporal distribution of electrical signals is obtained instantaneously, but the distribution is not optimal and power variations remain high

Engineering Contradiction:

Improveconvergence speedVSAvoiddistribution optimality

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent changes the distribution criterion from equal time intervals to a criterion based on the product of temporal length and power of electrical signals. This parameter change allows the system to achieve both instantaneous convergence and optimal distribution by weighting signals according to their actual energy content rather than treating all signals equally in time.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies a preliminary classification step before distribution, ordering electrical signals according to their temporal length and power characteristics. This preliminary arrangement enables the subsequent distribution algorithm to place signals in optimal positions immediately, achieving both speed and optimality without requiring iterative convergence.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If successive slippages of wave streams are used to converge toward regular distribution, then convergence toward optimal distribution is achieved, but the convergence is slow and requires multiple modulation periods

Engineering Contradiction:

Improvedistribution regularityVSAvoidconvergence time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent fundamentally changes the distribution criterion from simple temporal spacing to a criterion that incorporates both temporal length and power of signals. This allows the system to calculate optimal positions directly without requiring successive slippages and iterative adjustments, achieving optimal distribution in a single modulation period rather than multiple periods.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the iterative mechanical adjustment process (successive slippages) with a direct calculation method. Instead of gradually adjusting wave stream positions over multiple periods, the system computes optimal positions based on signal characteristics and applies them immediately, substituting a computational approach for a gradual physical adjustment process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If electrical signals are distributed without considering their temporal length and power, then the distribution criterion is simple to apply, but the instantaneous power emitted by the generator varies significantly

Engineering Contradiction:

Improvedistribution criterion complexityVSAvoidinstantaneous power variation

Core Design Contradiction:

Device complexityVSPower

Solution Approach 1:

The patent introduces two parameters (temporal length and power) into the distribution criterion to directly address power variation issues. By making the distribution criterion a function of these parameters, the system achieves optimal power distribution without requiring complex multi-step algorithms, maintaining relative simplicity while significantly reducing instantaneous power variations.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses the temporal length and power of electrical signals as feedback parameters to determine optimal distribution positions. This feedback mechanism allows the system to automatically adjust signal placement based on actual signal characteristics, ensuring minimal power variation without requiring external intervention or complex control logic.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP1837984B1Method of determination of a distribution of energy to a plurality of electrical loads and corresponding system

Publication Date: 2015.07.15 EUROTHERM AUTOMATION

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AI summary

This method of determination of a distribution of energy to a plurality of electrical loads (121, 122, ..., 12n) during a modulation period (T), the energy coming from at least one generator (14), the supply of a predetermined quantity of energy to any one of the electrical loads during this modulation period being effected by the generator emitting during a predetermined fraction of the modulation period an electrical signal the power whereof corresponds to that demanded by that electrical load, includes a temporal distribution of the electrical signals emitted by the generator in the modulation period in accordance with a distribution criterion determined as a function of the electrical signals and applied successively to each electrical signal in the same modulation period. The temporal distribution criterion for the electrical signals is more precisely determined as a function of the temporal length and the power of the electrical signals.