DC-AC Power Adapter with Selective Output for AC Devices
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Solution Overview
Problem
The transition from alternating current (AC) to direct current (DC) energy sources poses a compatibility issue for AC devices, as existing conversion methods are costly and energy-intensive, and conventional inverters are bulky.
Innovation Solution
An electrical energy transmission apparatus with a DC driving unit and an AC driving unit, connected to an adapter component that includes a detection unit, controller, and output selection unit, allowing for the conversion and selection of DC or AC power based on the AC device's requirements, ensuring compatibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional inversion manner is used to convert DC power into sine AC power, then AC devices can be powered, but costs are high, energy consumption is high, and inverter apparatus has large volume
Solution Approach 1:
The patent changes the fundamental parameter of power conversion by eliminating the inverter component entirely. Instead of converting DC to AC, the system directly outputs DC power to AC devices, leveraging the devices' existing rectification capabilities. This parameter change from 'DC-AC conversion' to 'DC direct output' resolves the energy consumption issue while maintaining compatibility
Solution Approach 2:
The patent extracts and removes the inverter component from the power supply system. By taking out the unnecessary AC conversion stage, the system eliminates the associated energy losses, costs, and volume while still achieving the goal of powering AC devices through their built-in rectifiers
2Adaptability or versatility
If conventional inversion manner is used to convert DC power into sine AC power, then AC devices can be powered, but costs are high, energy consumption is high, and inverter apparatus has large volume
Solution Approach 1:
The patent extracts and removes the inverter component from the power supply system. By taking out the unnecessary AC conversion stage, the system eliminates the associated energy losses, costs, and volume while still achieving the goal of powering AC devices through their built-in rectifiers
Solution Approach 2:
The patent inverts the conventional approach by not converting DC to AC, but rather outputting DC directly and letting the AC device's internal rectifier handle the conversion. This reversal of the power conversion sequence simplifies the external power supply apparatus significantly
3Adaptability or versatility
If DC power is output to AC device, then compatibility is improved, but arc may form across switch contacts when main switch opens
Solution Approach 1:
The patent introduces periodic pulse action to the DC output, creating intentional current interruptions that prevent arc formation. The pulse width modulation technique ensures current does not persist when switches open, eliminating harmful arcs while maintaining effective power delivery to AC devices
Solution Approach 2:
The patent applies preliminary action by using detection units to identify AC device characteristics before power delivery, and by implementing protection circuits that preemptively prevent harmful conditions. The system prepares appropriate pulse parameters in advance based on device detection, preventing arc formation before it can occur
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 apparatus provides a cost-effective, high-compatibility solution for powering AC devices using DC energy, reducing energy consumption and inverter size, while ensuring safe and efficient power delivery.
Implementation Method 1
an input component connected to a direct current (DC) energy storage component; the DC driving unit being arranged to converts energy of the DC energy storage component into a DC power
Implementation Method 2
the AC driving unit being arranged to converts energy of the DC energy storage component into an AC power
Data Source
Figure 1-I
Figure 1-II~2-II
Figure 2-I
AI summary
This invention discloses an electrical energy transmission apparatus. The electrical energy transmission apparatus includes an input component which is connected to a direct current (DC) energy storage component, an output component which comprises an alternating current (AC) device interface used to connect an AC device, and an adapter component which transfers electrical energy from the input component to the output component. The adapter component comprises a DC driving unit and an AC driving unit. The DC driving unit converts energy of the DC energy storage component into a DC power. The AC driving unit converts energy of the DC energy storage component into an AC power. At least one of the DC driving unit and the AC driving unit is connected to the AC device interface. The invention also discloses a control method for an electrical energy transmission apparatus, and a power supply system comprising an electrical energy transmission apparatus. The benefit of this invention is: an alternating current (AC) device interface of an electrical energy transmission apparatus selectively outputs a DC power and a AC power, reduce the cost for providing power to a AC device.