Electrostatic AC Generator With Constant Air Gap to Prevent Arcing
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Solution Overview
Problem
Conventional alternators are heavy and inefficient due to the use of ferromagnetic materials and often experience dangerous electric arc phenomena, leading to complex structures and increased costs.
Innovation Solution
An electrostatic alternating current generator with a sinusoidal output is designed using aluminum for the armatures and dielectric materials to reduce weight and manufacturing costs, eliminating the need for ferromagnetic materials and dielectric fluids, and featuring a constant capacity to prevent electric arc phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If ferromagnetic materials (iron or nickel) are used in alternators, then magnetic field generation is effective, but the total cost increases and the alternator becomes excessively heavy
Solution Approach 1:
The patent replaces the traditional electromagnetic system (using ferromagnetic materials and moving magnetic fields) with an electrostatic system. The generator uses stationary charged electrodes that create an electric field, and a rotating dielectric element that modulates this field to induce voltage in stator windings, eliminating the need for heavy ferromagnetic rotor components
Solution Approach 2:
The invention changes the fundamental operating parameter from magnetic field induction to electrostatic field modulation. By using high voltage DC charging of electrodes and rotating a dielectric barrier, the system generates alternating current through capacitive coupling rather than electromagnetic induction, achieving weight reduction while maintaining power generation capability
2Power
If conventional alternators operate with high voltage, then current generation capability increases, but dangerous electric arc phenomena occur
Solution Approach 1:
The patent introduces a dielectric material (such as glass, ceramic, or plastic) as an intermediary barrier between the charged electrodes. This dielectric layer prevents direct electrical discharge and arc formation while still allowing electric field penetration and capacitive energy transfer, enabling safe high-voltage operation
Solution Approach 2:
The invention converts the potentially harmful high-voltage electric field into a controlled electrostatic charging system. By using the dielectric barrier to control field distribution and prevent uncontrolled arcing, the system transforms what would be a dangerous condition into a controlled mechanism for generating sinusoidal alternating current through capacitive coupling
3Object-affected harmful factors
If dielectric fluids are used to attenuate electric arc phenomena, then arc suppression is achieved, but the structure of the alternator becomes more complex
Solution Approach 1:
The patent removes the need for complex arc suppression systems by preventing arc formation in the first place. The dielectric barrier between electrodes eliminates the requirement for external dielectric fluids, control circuits, and associated cooling and monitoring systems, resulting in a simpler overall structure
Solution Approach 2:
The dielectric material serves multiple functions simultaneously: it acts as an electrical insulator to prevent arcing, as a mechanical barrier to maintain electrode spacing, and as a component of the capacitive coupling mechanism for voltage generation. This multi-functionality eliminates the need for separate arc suppression systems
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 generator is lighter, more efficient, and simpler in structure, with reduced manufacturing costs and immunity to electric arc phenomena, enabling effective sinusoidal current generation for industrial and domestic use.
Implementation Method 1
During the rotation of the rotor element, each of the rotor electrodes forms with at least one portion of the stator electrodes two capacitors connected to each other in series via the resistor
Implementation Method 2
an electrostatic alternating current generator... exploiting the laws of magnetic induction based on which an electro-motive force is generated
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
The invention relates to an electrostatic alternating current generator (100; 200) comprising: - a shaft (1) movable by a motor (Mot) for rotating about an axis (Z); - a rotor element (10; 20) fixed to the shaft and comprising at least a first (11; 21) and at least a second (12; 22) rotor electrode; - a stator element (13; 23) fixed to a generator housing (13'; 23') unmovable with respect to the shaft; such a housing is configured to enclose the stator element, the rotor element and a portion of the shaft; the stator element comprises at least a first (14; 24) and at least a second (15; 25) stator electrode; - a direct voltage source (3) connectable to the at least a first and at least a second stator electrode through a first (16; 26) and a second (17; 27) stator terminal; - a first (4) and a second (5) metal connection element fixed to the shaft, the first metal element electrically connected to the at least a first rotor electrode and the second metal element electrically connected to the at least a second rotor electrode; - a resistor (R) having a first (r1) and a second (r2) terminal electrically connected to the first and second metal connection elements, respectively, to detect a variation over time of an electric potential difference (S) applied between the at least a first and at least a second rotor electrode following the rotation of the rotor element about the axis. Such an electrostatic generator further comprises a separation air gap (2) representative of a distance between the rotor element and the stator element unchanging during the rotation of the rotor element. During the rotation of the rotor element about the axis, each of these at least a first and at least a second rotor electrode form, with at least one portion of the at least a first and at least a second stator electrode, two capacitors connected to each other in series via the resistor.