Flywheel Hybrid Induction Power Supply for Clean Pulsed Laser AC
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Solution Overview
Problem
Existing power systems struggle to provide clean, sinusoidal AC power to pulsed loads like lasers, as they are sensitive to noise and waveform deviations from primary AC generators, and conventional energy storage solutions like lithium batteries and capacitor arrays are inadequate for handling rapid, large current demands.
Innovation Solution
A multi-port hybrid induction machine system that integrates a stator with multiple windings and a rotor connected to a flywheel, using a power converter and rotor exciter to stabilize power frequency and buffer kinetic energy, combined with filtering and feed-forward harmonic cancellation to isolate and smooth power outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional energy storage solutions like lithium batteries and capacitor arrays are used, then they can store electrical energy, but they are inadequate for handling rapid, large current demands and introduce noise into power waveforms
Solution Approach 1:
The patent combines a flywheel energy storage system with an induction machine to create a hybrid system that merges kinetic energy storage with electrical energy conversion. This integration allows the system to handle rapid current demands through the flywheel's inertial energy while the induction machine converts this kinetic energy to electrical energy with clean sinusoidal waveforms, avoiding the noise problems of conventional electrical energy storage solutions.
Solution Approach 2:
The patent replaces conventional electrical energy storage solutions (lithium batteries, capacitor arrays) with a mechanical energy storage system (flywheel). The flywheel stores energy mechanically through rotational kinetic energy, and the induction machine converts this mechanical energy to electrical energy, providing a noise-free alternative to electrical energy storage systems that inherently introduce waveform noise.
2Power
If a primary AC generator is used to power pulsed loads, then it can provide electrical power, but the power supplied sags and varies due to large current loads
Solution Approach 1:
The induction machine with flywheel acts as an intermediary between the primary AC generator and the pulsed loads. It buffers the large current demands of pulsed loads through the flywheel's kinetic energy, preventing direct impacts on the AC generator. This intermediary system maintains stable power waveforms by smoothing out the variations and sags that would otherwise occur when pulsed loads are directly connected to the generator.
Solution Approach 2:
The flywheel stores kinetic energy in advance, providing a cushion of energy that can be rapidly discharged to meet sudden current demands. This beforehand energy storage prevents power sags and variations by having energy already available to compensate for load fluctuations, rather than relying on the AC generator to respond to each transient demand.
3Object-affected harmful factors
If a hybrid induction machine with flywheel is used, then it can buffer kinetic energy and provide clean power, but the system complexity increases with multiple windings and ports
Solution Approach 1:
The induction machine is designed with multiple windings (input, output, and rotor windings) that enable a single device to perform multiple functions: receiving power from the AC generator, storing kinetic energy via the flywheel, providing clean buffered power to loads, and isolating noise. This multi-functionality consolidates what would otherwise require separate components into one integrated system, managing complexity through functional consolidation.
4Object-affected harmful factors
If filtering and feed-forward harmonic cancellation are applied, then noise and transients are isolated, but the control system complexity increases
Solution Approach 1:
The system employs feedback control mechanisms where the state of the flywheel (rotational speed, kinetic energy level) is continuously monitored and used to adjust the induction machine's operation. This feedback enables the system to dynamically respond to load changes and maintain power quality, with the control system adjusting excitation levels and power flow based on real-time conditions, managing the complexity through intelligent control rather than purely passive filtering.
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 system provides continuous, clean AC power to pulsed loads by isolating noise and transients, maintaining power quality despite fluctuations, and dynamically adjusting to meet instantaneous energy demands using kinetic and electrical energy storage.
Implementation Method 1
The shaft is connected to an energy storage device, such as flywheel
Implementation Method 2
The rotor is disposed to rotate within a magnetic field of the input winding, the first output winding and the second output winding
Implementation Method 3
a rotor exciter connected to the first rotor port and configured to provide an AC excitation signal
Data Source
AI summary
A hybrid induction machine includes a stator with an input winding, a plurality of output windings with output ports, and a rotor connected to a flywheel operating as a reserve of kinetic energy to buffer surges in demand for electrical power due to large, pulsed loads with high repetition rates. Degradation of power quality at the output ports of the hybrid induction machine due to electrical noise on a main bus providing electrical power to the hybrid induction machine and other apparatus can be eliminated through the use of feed-forward harmonic cancellation signals, galvanic and magnetic isolation of the output ports, and damper networks.