Bi-Directional Power Controller for Ripple-Free Energy Cutoff
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Solution Overview
Problem
Conventional power controllers, particularly those using thyristors, face challenges in controlling energy transfer efficiently due to uncontrollable cut-off mechanisms, leading to undesirable ripple and oscillations in high-precision applications, especially when dealing with deviations in input voltage.
Innovation Solution
A power controller circuit with a bi-directional switching assembly and a controller that can switch between conduction and non-conduction modes, allowing precise control of energy transfer by monitoring energy parameters and adjusting phase angles, incorporating an optional delay to manage energy cut-off and cut-on transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional power controllers use thyristors for energy transfer control, then the device structure is simple, but uncontrollable cut-off mechanisms cause undesirable ripple and oscillations in high-precision applications
Solution Approach 1:
The patent changes the operational parameters of the power controller by using controllable switches (MOSFETs or IGBTs) that can be precisely turned on and off, replacing the uncontrollable thyristor cut-off mechanism. This enables precise control of the duty cycle and switching timing, eliminating the harmful ripple and oscillations while maintaining simple device structure
Solution Approach 2:
The patent incorporates feedback mechanisms where the controller monitors the energy transfer and adjusts the switching timing and duration accordingly. This closed-loop control ensures precise power delivery and eliminates the oscillations caused by uncontrollable cut-off in conventional thyristor-based systems
2Productivity
If power controllers allow full input power transmission to load, then energy efficiency is maximized, but control precision over energy delivery is reduced
Solution Approach 1:
The patent employs dynamic control of the switching assembly, where the controller can adjust the switching frequency and duty cycle in real-time based on load requirements. This dynamic adjustment maintains high energy transfer efficiency while providing precise control over the amount of energy delivered to the load
Solution Approach 2:
The patent uses periodic switching action with variable duty cycles to control energy transmission. By adjusting the ratio of on-time to off-time in each switching period, the system achieves both high efficiency and precise energy delivery control, allowing the controller to deliver exactly the required amount of power
3Device complexity
If power controllers use uncontrollable cut-off mechanisms, then device complexity is reduced, but harmonics and stress on components increase
Solution Approach 1:
The patent replaces the mechanical/uncontrollable thyristor cut-off mechanism with electronic controllable switches (MOSFETs or IGBTs) that can be precisely controlled through electronic signals. This substitution maintains relatively simple device structure while eliminating the harmful harmonics and component stress caused by uncontrollable cut-off
Data Source
AI summary
A power controller circuit comprises a controller and a bi-directional switching assembly coupled to a sensor configured to sense at least one energy parameter of an energy flowing through the bi-directional switching assembly. The bi-directional switching assembly comprises a controllable switch. The controller is configured to control the controllable switch into a conduction mode during a first portion of an energy cycle of electrical energy supplied to the bi-directional switching assembly to cause the energy to flow through the bi-directional switching assembly. Via the sensor, the controller monitors the at least one energy parameter of the energy flowing through the bi-directional switching assembly. The controller controls the first controllable switch into a non-conduction mode based on an amount of the at least one energy parameter of the energy flowing through the bi-directional switching assembly during the first portion.