Flywheel energy storage in 2026: overview
Flywheel energy storage converts electricity into rotational kinetic energy and back again through a motor-generator. Its rapid response and ability to handle frequent cycling make it useful for short-duration power support, frequency regulation and backup applications. The engineering challenge is to deliver power reliably while managing rotor stability, bearing losses, heat and safety within a high-speed containment system.
Current work pairs flywheels with batteries and thermal power units to support low-inertia grids, while researchers refine magnetic-bearing control and machine efficiency. In September 2026, Qnetic began low-speed testing of its full-scale 200-kWh Pulsar prototype; in August 2026, it entered an EPRI validation program. Recent studies from North China Electric Power University examine flywheel-assisted frequency regulation, while work at VSB – Technical University of Ostrava analyzes casting a 34CrMo4 steel rotor. Control, validation and mechanical integrity are converging priorities.
- 1Fast grid response: Research increasingly coordinates flywheels with batteries and thermal units to deliver fast frequency support while accounting for limited stored energy.
- 2Control meets durability: Magnetic-bearing stability, vibration, thermal management and rotor integrity remain core engineering constraints as designs target reliable high-speed operation.
- 3Containment gains focus: Containment and vacuum design activity rose 60%, making it a relative bright spot as developers address losses and operational safety.
Top organizations working on flywheel energy storage
Ranked by Linknovate activity score · last 24 monthsThe activity score adds up the relevance of every patent, publication, grant and news item linking an organization to flywheel energy storage. Showing 7 of 170 organizations.
| # | Organization | Approach | Signals (24 mo) | Momentum | Why it matters |
|---|---|---|---|---|---|
| 1 | Hybrid systems and control | PUB 36 | -62% | Recently, researchers proposed a time-partitioned control strategy for flywheel-assisted coal units in secondary frequency regulation. Their work also addresses disturbance-resistant speed control and flywheel-battery coordination for grid frequency support. | |
| 2 | 
Tsinghua University
Research · China |
Electrical machines and conversion | PUB 19 | -81% | Researchers investigate flywheel rotor dynamics and stability across operating speeds, reduce eddy-current losses in high-speed stator-permanent-magnet machines, and develop model-predictive power control for grid applications. |
| 3 | 
Huazhong University of Science and Technology
Research · China |
Electrical machines and conversion | PUB 18 | -62% | Researchers designed and experimentally studied a toroidal-winding flywheel motor for low- and medium-speed operation. Their work also addresses constant-power discharge control and inverter strategies for flywheel systems. |
| 4 | 
Jiangsu University
Research · China |
Bearing systems | PUB 23 | +30% | Recently, researchers proposed robust control for vehicle-mounted magnetic-suspension flywheel batteries across different prototypes. Their work also covers magnetic-bearing control and fault-tolerant electrical machines for flywheel storage. |
| 5 | 
Inner Mongolia University of Technology
Research · China |
Hybrid systems and control | PUB 8 · NEWS 1 | -88% | Researchers study predictive control and power allocation for hybrid flywheel storage, including wind-farm smoothing. They also analyze rotor cooling and converter designs for flywheel systems. |
| 6 | 
University of Chinese Academy of Sciences
Research · China |
Bearing systems | PUB 10 | +0% | Researchers investigate hybrid magnetic-bearing control for flywheel systems, alongside rotor cooling and thermal behavior under vacuum conditions. |
| 7 | WN
Wuhan Naval University of Engineering
Research · China |
Electrical machines and conversion | PUB 10 | -57% | Researchers design flywheel motors and inverter controls, with applications including urban rail recovery of regenerative braking energy. |
| 8 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 9 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 10 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
Leading research centers
Leading research institutions 126 total
North China Electric Power UniversityRecently, researchers proposed a time-partitioned control strategy for flywheel-assisted coal units in secondary frequency regulation. Their work also addresses disturbance-resistant speed control and flywheel-battery coordination for grid frequency support.- Tsinghua UniversityChinaResearchers investigate flywheel rotor dynamics and stability across operating speeds, reduce eddy-current losses in high-speed stator-permanent-magnet machines, and develop model-predictive power control for grid applications.
- Huazhong University of Science and TechnologyChinaResearchers designed and experimentally studied a toroidal-winding flywheel motor for low- and medium-speed operation. Their work also addresses constant-power discharge control and inverter strategies for flywheel systems.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
Where flywheel energy storage innovation happens
Share of documents with at least one organization from each country.
Open the interactive map with all 170 organizationsMain technical approaches
Last 24 months| Approach | What it is | Documents | Leading organizations |
|---|---|---|---|
| Rotor materials and speed | Higher rotor strength and speed can raise stored energy, but increase demands on fatigue resistance, manufacturing quality and containment. | 43 |
Netic, Siemens AG, Beacon Power |
| Bearing systems | Magnetic bearings reduce contact and friction, but require stable control and careful management of vibration, disturbances and sensor delays. | 65 |
Netic, UPS, Beacon Power |
| Electrical machines and conversion | Motor-generator and converter designs govern power transfer and losses, trading compact, responsive operation against heat and control complexity. | 69 |
North China Electric Power University, University of Nottingham, Xi'an Jiaotong University |
| Containment and vacuum design | Vacuum enclosures reduce aerodynamic losses, but make heat removal and rotor-failure containment more demanding. | 13 |
Netic, Shanghai JiaoTong University, Levistor |
| Hybrid systems and control | Flywheels paired with batteries or generation can combine fast response with longer energy delivery, but add coordination and sizing challenges. | 150 |
North China Electric Power University, Siemens AG, Inner Mongolia University of Technology |
Emerging trends
Last 12 months vs previous 36 monthsTerms whose frequency in the last 12 months grew the most compared with the previous 36 months.
Funding and investment
Recent funding rounds
FACTS records $19,664,892 in grants across 11 awards since 2020. Funding-round records are not a clean measure of flywheel-specific investment, so they are not summarized here.
Patent landscape
Top patent holders · last 24 monthsRecent developments
Latest news, duplicates removed- Sep 2026NEW YORK, Sept. 21, 2026 (GLOBE NEWSWIRE) -- Qnetic today announced it has begun low-speed testing of Pulsar™, its first full-scale 200-kWh flywheel energy storage prototype, marking the system's transition from…GlobeNewswire: News from New York
- Aug 2026NEW YORK, Aug. 18, 2026 (GLOBE NEWSWIRE) -- As utilities seek independently validated alternatives to lithium-ion batteries for long-duration energy storage, Qnetic today announced it has entered EPRI’s deRISKED…GlobeNewswire: Industry News on Renewable Energy Equipment
- Jul 2026Dublin, July 20, 2026 (GLOBE NEWSWIRE) -- The "Flywheel Energy Storage System Market - Global Forecast 2026-2032" report has been added to ResearchAndMarkets.com's offering. The Flywheel Energy Storage System Market is…GlobeNewswire: Industry News on Industrials
- Jul 2026From THE MANHATTAN CONTRARIAN Advocates of generating electricity mostly with intermittent wind and sun, when challenged on how they would deal with a calm night, are always ready with the obvious answer: energy…Watts Up With That?
- Month 20XXHidden developmentAvailable to registered users with alerts enabled.
Frequently asked questions about flywheel energy storage
What companies are working on flywheel energy storage?
Amber Kinetics, Beacon Power and Qnetic are named in the available company and news records. Amber Kinetics develops systems for grid and renewable-energy applications, while Beacon Power focuses on utility frequency regulation. Qnetic began testing its full-scale Pulsar prototype in September 2026 and entered an EPRI validation program in August 2026.
Which universities and research centers lead flywheel energy storage research?
North China Electric Power University leads the listed research organizations with 36 recent documents. Tsinghua University, Huazhong University of Science and Technology and Jiangsu University are also active. Their work spans frequency regulation, electrical machines, rotor stability, magnetic bearings and flywheel-battery coordination.
How much funding has flywheel energy storage received?
FACTS lists $19,664,892 in grants across 11 awards since 2020. This figure summarizes recorded grants, not total industry investment. Funding-round entries can include activity that is not clearly specific to flywheel energy storage, so they should not be treated as a reliable sector-wide total.
Who holds the most flywheel energy storage patents?
MItsubishi Electric leads the listed patent holders with 7 patents. Nippon Steel & Sumitomo Metal Corporation follows with 6, and Baosteel has 5. The other named holders include POSCO and Siemens Energy Global GmbH &; the listed counts describe patent-holder records, not a full measure of each organization’s intellectual property.
Is flywheel energy storage patent activity growing?
No: FACTS reports that patent activity declined over the latest 12-month window compared with the previous 12 months. Publication activity moved in the opposite direction, rising over the same comparison. This split suggests ongoing technical research alongside a weaker recent pace of patenting.
What are the latest developments in flywheel energy storage?
Qnetic began low-speed testing of its full-scale 200-kWh Pulsar prototype in September 2026 and entered EPRI’s validation program in August 2026. Recent research also addresses control of magnetically suspended rotors, coordination with batteries for low-inertia grids, steel rotor casting, and flywheel-assisted frequency regulation.
What new methods or terms are emerging in flywheel energy storage?
Recent work highlights model predictive control, electric machine control, digital storage and microgrids. Researchers are also applying transfer learning to control strategies across different vehicle-mounted flywheel prototypes, and developing control-aware sizing for frequency regulation. These directions respond to practical needs: stable operation, efficient power conversion and coordinated grid response.
Which countries lead flywheel energy storage?
China leads the listed country activity with 1,440 documents, followed by the United States with 1,088. Japan and Germany are also prominent, with 529 and 528 documents respectively. These counts indicate where the recorded research, patent and news activity is concentrated; they do not measure installed system capacity.
What are the applications of flywheel energy storage?
The listed applications include grid services; uninterruptible power and data centers; renewables and microgrids; transportation; and industrial and pulse power. Recent research emphasizes frequency regulation and renewable integration, while other work studies vehicle-mounted flywheels and recovery of regenerative braking energy.