Bridging Unit for Control Unit Power Supply Stability
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Solution Overview
Problem
Electrical devices with switching units often experience undesirable startup times and performance issues due to power supply interruptions, particularly in devices like hand-held machine tools, where the control unit is not adequately powered during switching off.
Innovation Solution
Incorporating a bridging unit with a voltage conversion unit, including a high-impedance resistance element, to maintain a continuous power supply to the control unit, enabling a low-energy standby mode and simplifying voltage conversion, thus ensuring stable operation and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching unit switches off the power supply to the consumer unit, then the consumer unit is powered off, but the control unit cannot be supplied with power causing undesirable startup time
Solution Approach 1:
The bridging unit is pre-configured to take over power supply to the control unit when the switching unit disconnects the consumer unit. This preliminary arrangement ensures that the control unit maintains power availability without interruption, eliminating startup delays while preserving the switching function.
2Reliability
If a bridging unit is added to supply power to the control unit, then continuous power supply is achieved, but the device complexity increases
Solution Approach 1:
The bridging unit is integrated into the existing electrical circuit architecture by merging it with the switching unit and power supply components. This combination approach achieves continuous power supply functionality without adding completely separate systems, thereby limiting the increase in overall device complexity.
3Use of energy by moving object
If a voltage conversion unit is added to the bridging unit, then low-energy standby mode is enabled, but the device complexity increases
Solution Approach 1:
The voltage conversion unit is designed to serve multiple functions: it converts voltage for the control unit during normal operation, enables low-energy standby mode, and can support additional functions. This multi-functionality justifies the added complexity by delivering multiple benefits from a single integrated component.
4Device complexity
If high-impedance resistance unit is used for voltage conversion, then simple structure is achieved, but voltage conversion capability is limited
Solution Approach 1:
The voltage conversion capability is achieved by changing the impedance parameter of the resistance unit to high values. This parameter change enables simple voltage division and conversion using basic resistive elements, maintaining structural simplicity while providing adequate voltage conversion for control and standby functions.
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
This configuration ensures a stable and efficient power supply to the control unit, reducing startup times and enhancing performance by allowing continuous operation and adding protective functions, particularly in hand-held machine tools like angle grinders.
Implementation Method 1
The voltage conversion unit has a resistance unit with at least one high-impedance resistance element
Data Source
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AI summary
The invention relates to an electrical device comprising a switching unit (12), which is provided for switching a power supply of a consumer unit (14), and a control unit (16) for controlling the consumer unit (14). According to the invention, the electrical device comprises a bridging unit (18) provided for supplying power to the control unit (16) when the power supply is switched off by the switching unit (12).