Signal Separator Output Transistor Voltage Control
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Solution Overview
Problem
Existing signal separators and signal feed separators face complications due to the need for complex designs with measuring resistors, high power loss control, and susceptibility to faults, particularly when adapting supply voltage to momentary power demand and requiring voltage drops for control signals.
Innovation Solution
A signal (feed) separator design that uses a DC transformer and auxiliary energy feed with a control device to maintain a constant output voltage, independent of the burden, utilizing a measurement device with a transistor to control the output stage and minimize power loss, and incorporating a current-to-current converter to manage power efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the supply voltage of the output stage is adapted to the momentary power demand using measuring resistors, then the power loss is kept low, but the device complexity increases and fault susceptibility increases
Solution Approach 1:
The patent extracts and eliminates the measuring resistors from the circuit by using the emitter resistor of the output transistor itself for voltage sensing. This removes the problematic external measuring resistors while maintaining the power loss control functionality through the existing transistor structure.
Solution Approach 2:
The emitter resistor of the output transistor serves multiple functions: it provides the necessary voltage drop for the control circuit and simultaneously enables power loss monitoring without requiring separate measuring resistors. This multi-functionality reduces component count and complexity.
2Loss of energy
If measuring resistors are used to control the supply voltage of the output stage, then power loss is reduced, but the reliability decreases due to fault susceptibility
Solution Approach 1:
The patent removes the external measuring resistors that cause reliability issues by utilizing the transistor's own emitter resistor for voltage sensing. This eliminates the fault-prone components while maintaining the power control function.
3Ease of operation
If a resistor is used to provide a voltage drop for the control signal, then the control signal is obtained, but the device complexity increases and power loss increases
Solution Approach 1:
The emitter resistor of the output transistor serves dual purposes: it provides the necessary voltage drop for the control circuit operation and simultaneously enables power loss monitoring. This eliminates the need for separate control resistors and reduces overall device complexity.
Solution Approach 2:
The patent merges the control signal generation function with the power loss monitoring function by using the same emitter resistor for both purposes. This consolidation reduces the number of components and simplifies the circuit design.
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 effectively reduces power loss and minimizes the influence of burden on the output stage, ensuring reliable operation with reduced complexity and fault susceptibility by maintaining constant voltage and independent power management.
Implementation Method 1
a DC transformer (100) for transferring primary-side measurement input current (Iin)
Implementation Method 2
the measurement device (500) comprises a transistor (T2), whereby the potential of the output stage (200) is determined and the collector output signal of said transistor is provided to a feedback input (FB) of the control device (300) for control purposes
Data Source
AI summary
The invention relates to a signal (feed) separator for dead-zero or live-zero measurement signals. The signal (feed) separator has a primary-side (feed) input, a secondary-side output, a direct-current transformer for transferring primary-side measurement input current, an output stage for providing a secondary-side measurement output current, and an auxiliary energy feed-in for supplying the primary side and for supplying the secondary side. The auxiliary voltage of the auxiliary energy feed-in is controlled on the secondary side by a control device with the aid of a measuring device in such a way that the power loss of the output stage is substantially independent of a load connected in the operating state.