Switching AC-DC Power Converter Frequency Control
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Solution Overview
Problem
Existing power supply devices for electromechanical actuators have high electrical consumption and manufacturing costs, especially when equipped with communication modules, and fail to maintain low energy efficiency in standby mode.
Innovation Solution
A power supply device with a switching AC-DC power converter and a regulating device that adjusts switching frequency based on measured electrical quantities, using a sensor and control circuit to identify predetermined intervals and associate them with optimal switching frequencies for energy efficiency, including an additional interval for predefined energy efficiency response curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a communication module is added to the electromechanical actuator, then wireless communication capability is improved, but electrical consumption increases
Solution Approach 1:
The power supply device dynamically adjusts the switching frequency of the power converter based on the electrical quantity measured at the output. The control circuit identifies which predetermined interval the measured value falls into and selects the corresponding switching frequency, enabling the system to adapt its energy consumption to actual load requirements while supporting communication modules.
2Device complexity
If the switching frequency is fixed, then device complexity is reduced, but energy efficiency deteriorates
Solution Approach 1:
The invention changes the switching frequency parameter dynamically based on measured electrical quantities. The control circuit measures an electrical quantity at the output, identifies the corresponding predetermined interval, and selects an appropriate switching frequency from multiple predefined options. This allows the system to optimize energy efficiency across different operating conditions while maintaining relatively simple control logic through predetermined intervals and frequencies.
3Ease of operation
If PWM signal adaptation is used, then ease of operation is improved, but manufacturing cost increases
Solution Approach 1:
The control approach is segmented into predetermined intervals of electrical quantity values, each associated with a specific switching frequency. Instead of implementing complex continuous control algorithms, the system divides the operating range into discrete segments, making the control logic simpler and more cost-effective to manufacture while still providing adaptive PWM signal control for different operating conditions.
4Loss of energy
If standby mode consumption is reduced below 0.5 Watt, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The power supply device monitors its own output electrical quantity and automatically adjusts its switching frequency accordingly. This self-regulating mechanism enables the system to enter low-power states during standby conditions without requiring complex external power management circuits, achieving standby consumption below 0.5 Watt while maintaining relatively simple device architecture.
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
Optimizes energy efficiency by adapting switching frequency to reduce conduction and switching losses, maintaining low electrical consumption in standby mode and reducing manufacturing costs.
Implementation Method 1
a sensor, the sensor being configured to measure an electrical quantity associated with the output
Implementation Method 2
The control circuit is configured for: automatically determining a switching frequency as a function of the electrical quantity measured by the sensor, to switch the power switch with the determined switching frequency
Implementation Method 3
a switching AC-DC power converter, the power converter comprising at least one power switch
Data Source
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AI summary
A power supply device (200; 200') comprises: - a switching AC-DC power converter (210; 210'), including at least one power switch (214); and - an output (222) connected to the output of the power converter. The power supply device further comprises at least one control device (230), including at least: - a sensor (232) configured to measure an electrical quantity associated with the output (222); and - a control circuit (234) configured to: - automatically determine a switching frequency based on the electrical quantity measured by the sensor; and - switch said at least one power switch at the determined switching frequency.