Power supply device, inverter device and converter device employing said power supply device, and refrigeration device and air cleaner employing said inverter device or converter device
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Solution Overview
Problem
Existing power supply devices for machines like air conditioners require separate circuits for power generation and detection, leading to increased parts and mounting area on control boards, which is inefficient and costly.
Innovation Solution
A power supply device that integrates a power generation unit, a detection unit, and a calculation unit, where the detection unit uses the rectifying part of the power generation unit, reducing the need for additional components and minimizing board space and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate circuits are provided for power generation and detection, then the reliability of each circuit is improved, but the number of parts and mounting area increase
Solution Approach 1:
The patent combines the power generation circuit and detection circuit into a single integrated circuit. The rectifying part serves dual purposes: generating power for the control board and providing detection signals for AC power frequency and phase. This merging eliminates the need for separate circuits, reducing part count while maintaining functional reliability through shared components.
Solution Approach 2:
The rectifying part is designed to perform multiple functions simultaneously: it acts as both a power generation component and a detection signal source. By making this component universal, the patent reduces the overall circuit complexity without sacrificing the reliability of either power supply or detection functions.
2Adaptability or versatility
If separate circuits are provided for power generation and detection, then the functional independence is improved, but the mounting area on control board increases
Solution Approach 1:
The patent merges the power generation and detection circuits into a single integrated structure, significantly reducing the mounting area on the control board. The shared rectifying part and common circuit elements eliminate the need for separate physical circuit implementations, thereby conserving board space while maintaining functional capabilities.
Solution Approach 2:
By designing the rectifying part to serve both power generation and detection purposes, the patent achieves functional versatility within a compact footprint. This multi-functional approach allows the circuit to perform multiple tasks without requiring proportional increases in mounting area.
3Measurement precision
If separate detection circuit is provided, then the detection accuracy is improved, but the component voltage ratings and costs increase
Solution Approach 1:
The rectifying part is designed to serve dual purposes with optimized voltage ratings that satisfy both power generation and detection requirements. By making this component universal, the patent avoids the need for separate high-voltage detection components, thereby reducing overall component cost while maintaining detection accuracy through proper signal processing.
Solution Approach 2:
The patent optimizes the voltage rating parameters of the shared rectifying part and associated components to balance power handling and detection accuracy requirements. By carefully selecting parameter values that satisfy both functions, the patent reduces manufacturing costs compared to using separate circuits with redundant high-voltage components.
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 integration reduces the number of parts and mounting area on control boards, lowers component voltage ratings, and decreases costs while enabling accurate detection of AC power frequency, cycle, and phase, eliminating the need for separate detection circuits in inverter and converter devices.
Implementation Method 1
a charging unit that rectifies AC power and is charged by a rectified voltage
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
An object of the present invention is to provide a power supply device capable of realizing reduction of the number of parts and the mounting area on a control board. Since the power supply device (50) can be provided with a power cycle detection circuit (33) that also uses a rectifying element (D1) or a current limiting resistor (R1) which is already provided in a transmission power supply unit (24), the number of parts and the mounting area on a control board equipped with the power supply device (50) can be reduced. Furthermore, in the power supply device (50), because a charging unit (24a) is charged by a voltage being lower than a voltage rectified by the rectifying element (D1) and the rating of a component of the power cycle detection circuit (33) using the charging unit (24a) can be set low on the basis of the voltage being lower than a voltage rectified by the rectifying element (D1), cost reduction can be achieved in a control board equipped with the power supply device (50).