Triac And Thyristor Control Circuit With Integrated Rectified Drive
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Solution Overview
Problem
Existing voltage converter circuits, particularly those using triacs or thyristors, face inefficiencies in control and power supply, leading to suboptimal performance in converting AC to AC or DC voltages and powering motors.
Innovation Solution
A control circuit for triacs or thyristors is developed, incorporating a bipolar transistor and a driving circuit referenced to a semiconductor device, which includes a diode or MOS transistor, and a Zener diode for efficient control, potentially with a processor for configuration, to improve power factor correction and reduce complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional control circuits for triacs or thyristors are used, then the circuit can perform basic voltage conversion, but the control efficiency is suboptimal and additional components like optocouplers are required
Solution Approach 1:
The patent combines the control circuit and power supply circuit into a single integrated structure. The bipolar transistor serves dual functions: controlling the triac/thyristor while also providing power supply through its collector-emitter path. This eliminates the need for separate optocouplers and independent power supply components, directly reducing component count while maintaining control efficiency.
Solution Approach 2:
The bipolar transistor is designed to perform multiple functions simultaneously: it acts as a control element for the triac/thyristor gating, provides power supply voltage through its collector-emitter connection, and enables voltage rectification through the integrated semiconductor devices. This multi-functionality reduces the need for separate dedicated components for each function.
2Reliability
If additional components like optocouplers are used for control, then isolation and control are achieved, but the circuit complexity increases and compactness is reduced
Solution Approach 1:
The control and power supply functions are merged into the bipolar transistor structure, eliminating the need for separate optocoupler components. The transistor's internal structure provides both control signal transmission and power supply capability, reducing the overall circuit volume while maintaining functional isolation through the transistor's inherent electrical properties.
3Reliability
If separate power supply circuits are used for the control circuit, then power supply stability is achieved, but the overall circuit efficiency decreases
Solution Approach 1:
The power supply circuit is merged with the control circuit through the bipolar transistor. The collector-emitter path of the transistor directly provides power supply voltage to the control circuit, eliminating energy losses associated with separate power supply circuits. This integrated approach ensures that power is drawn directly from the main circuit with minimal conversion losses while maintaining stable control voltage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the efficiency of voltage converter circuits, improves power supply for motors, and reduces the need for additional components like optocouplers, resulting in a more reliable and compact control system.
Implementation Method 1
a Zener diode for efficient control
Implementation Method 2
A first bipolar transistor; A driving circuit of said first transistor
Implementation Method 3
a voltage rectifier comprising at least a semiconductor device
Data Source
AI summary
The present disclosure relates to a control circuit of a triac or thyristor having its driving reference terminal connected to a first reference node and coupled to a voltage rectifier comprising at least a semiconductor device connected between the first reference node and a second reference node of the control circuit comprising: a first bipolar transistor; and a driving circuit of the first transistor referenced to the second reference node.