Modular Voltage Modulation for Balanced Switching and Lower Heat Loss
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Solution Overview
Problem
Existing voltage modulation methods lead to unbalanced and unreliable operation of switching units in amplifiers, resulting in premature wear and high maintenance needs, due to unbalanced working conditions and high switching frequencies, which also limit sampling frequency and increase heat-power losses.
Innovation Solution
A method for voltage modulation that includes initializing counters and activation variables to control a series of modules, dynamically activating and deactivating them based on a modulating signal's error variable, ensuring balanced operation and reducing switching frequency stress, thereby extending device reliability and reducing heat-power losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If switching units operate at high switching frequencies to achieve high sampling frequency, then sampling frequency is improved, but heat-power loss increases and reliability deteriorates
Solution Approach 1:
The patent implements dynamic load sharing among switching units by continuously adjusting the active number of switching units based on the instantaneous value of the modulating signal. This dynamic adjustment allows the system to optimize the balance between switching frequency and power loss, as switching units are activated or deactivated according to the signal amplitude, reducing unnecessary high-frequency switching operations and thereby lowering heat-power loss while maintaining sampling frequency requirements.
Solution Approach 2:
The patent changes the operational parameters of switching units by varying the active number of switching units (k) according to the modulating signal value. This parameter change enables the system to adapt the switching frequency and power consumption characteristics dynamically, resolving the contradiction between maintaining high sampling frequency and reducing heat-power loss.
2Speed
If switching units operate at high switching frequencies, then sampling frequency is improved, but reliability deteriorates due to premature wearing
Solution Approach 1:
The patent implements dynamic load sharing among switching units by continuously adjusting the active number of switching units based on the instantaneous value of the modulating signal. This dynamic adjustment allows the system to optimize the balance between switching frequency and reliability, as switching units are activated or deactivated according to the signal amplitude, reducing unnecessary high-frequency switching operations and thereby lowering wear on individual units while maintaining sampling frequency requirements.
Solution Approach 2:
The patent employs periodic modulation of switching unit activation based on the modulating signal, creating a rhythmic pattern of switching operations. This periodic action distributes the switching stress more evenly across different units over time, preventing any single unit from undergoing continuous high-frequency switching that would lead to premature wear, thus improving reliability while maintaining the required sampling frequency.
3Loss of energy
If more switching units are activated to reduce power loss, then heat-power loss is reduced, but device complexity increases
Solution Approach 1:
The patent divides the amplifier into multiple independent switching units (first switching unit, second switching unit, etc.), each capable of independent activation and deactivation. This segmentation allows the system to dynamically adjust the number of active units based on the modulating signal, reducing power loss by activating only the necessary number of units while keeping the overall system architecture relatively simple through modular design.
Solution Approach 2:
The patent designs switching units with universal functionality, where each unit can operate independently or in combination with others based on the signal requirements. This multi-functionality allows the same switching unit design to be reused multiple times, reducing the need for different complex circuit designs while enabling flexible power management to minimize heat-power loss.
Data Source
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AI summary
In a method for voltage modulation using a plurality of modules (2) connected in series and connected to a load (3) , the modules having supply sources (Aj) and switching means (Mj ) to connect or disconnect the supply sources so as to either decrease or increase, respectively, a voltage applied to the load (3), by a value equal to the voltage (Ej) supplied by the supply source, the switching means (Mj) are controlled by a central unit (1) , according to processing of at least one modulating signal (m) . The method provides for a balanced operation of the modules (2) and a considerable increase of the duty cycle frequency (fc) , keeping the same heat losses on each module, so that a smaller and less expensive low-pass filter can be set on the load (3) .