Floating Voltage Source With Capacitive Coupling For Stable Output
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Solution Overview
Problem
In electric motor power supply circuits, existing voltage sources face challenges in maintaining a stable voltage between output nodes with varying potentials, leading to significant current variations and potential overloads when switching between different voltage applications.
Innovation Solution
A floating voltage source is designed with capacitive elements and MOS-type transistors to maintain a constant voltage between nodes by using auxiliary voltage sources and current mirrors, which control the switching of potentials and manage capacitive coupling, ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional voltage source is used to supply power to electric motor circuits, then the circuit can operate with simple structure, but the voltage between output nodes cannot remain stable when potentials vary, causing current variations and potential overloads
Solution Approach 1:
The voltage source is segmented into multiple independent sections: a first section with a first switch and first capacitive element for controlling the first output node, and a second section with a second switch and second capacitive element for controlling the second output node. This segmentation allows each section to independently maintain voltage stability at its respective node, resolving the voltage stability issue while keeping each segment's complexity manageable.
Solution Approach 2:
Capacitive elements are coupled between each output node and its respective control node beforehand, creating preliminary charge storage paths. When potential variations occur at output nodes, these pre-positioned capacitive elements immediately respond to maintain voltage stability, preventing current spikes and overloads before they can affect the overall circuit.
2Adaptability or versatility
If switches are used to alternate potential application on output nodes, then the power supply can adapt to different operating conditions, but significant current variations and overloads occur during switching transitions
Solution Approach 1:
Capacitive elements are introduced as intermediary components between the switches and the output nodes. During switching transitions, these capacitive elements act as mediators that absorb and release charge to smooth out current variations, preventing direct current spikes while allowing the switches to maintain their adaptive potential application functionality.
Solution Approach 2:
The invention changes the electrical parameters (voltage and current) at the output nodes by coupling capacitive elements that can store and release charge. This parameter transformation allows the power supply to adapt to different operating conditions through switch control while maintaining current stability through the charge-regulating effect of the capacitive elements.
3Reliability
If a floating voltage source maintains constant voltage between output nodes with varying potentials, then voltage stability is achieved, but the circuit requires multiple capacitive elements and auxiliary voltage sources
Solution Approach 1:
The floating voltage source is divided into independent first and second sections, each with its own switch and capacitive element. This segmentation allows each section to maintain voltage stability at its respective output node independently, achieving overall voltage constancy between nodes while using minimal necessary components for each function rather than requiring a single complex circuit.
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 solution effectively maintains a substantially constant voltage between output nodes during potential variations, reducing current spikes and preventing voltage overloads, thus enhancing the reliability and efficiency of the power supply.
Implementation Method 1
at least one first capacitive element couples the first node or a second node of the voltage source to a control node of the first switch
Implementation Method 2
the first resistive element comprises at least one first MOS-type transistor having its gate coupled to its drain, the first switch comprising at least one second MOS-type transistor forming a current mirror with the first transistor
Data Source
AI summary
A voltage source wherein at least one first switch couples a first node of the voltage source to a node of application of at least one potential of a power supply voltage, and at least one first capacitive element couples the first node or a second node of the voltage source to a control node of the first switch.