Fully superconducting machine for electric aircraft propulsion: study of AC loss for HTS stator

  title={Fully superconducting machine for electric aircraft propulsion: study of AC loss for HTS stator},
  author={Fangjing Weng and Min Zhang and Tian Lan and Yawei Wang and Weijia Yuan},
  journal={Superconductor Science and Technology},
Fully superconducting machines provide the high power density required for future electric aircraft propulsion. However, superconducting windings generate AC losses in AC electrical machine environments. These AC losses are difficult to eliminate at low temperatures, and they add an extra burden to the aircraft cooling system. Due to the heavy cooling penalty, AC loss in the HTS stator is one of the key topics in HTS machine design. In order to evaluate the AC loss of superconducting stator… 

Transient Test and AC Loss Study of a Cryogenic Propulsion Unit for All Electric Aircraft

The test shows AC loss performance of the HTS windings using calorimetric method during the short circuit event, indicating the importance of developing protection schemes for the cryogenic propulsion units to prevent damage to the H TS components.

Alternating Current Loss of Superconductors Applied to Superconducting Electrical Machines

This article systematically reviews the qualitative and quantitative analysis methods of AC loss as well as its reduction techniques in superconductors applied to electrical machines for the first time to help deepen the understanding of AC Loss and deliver a helpful guideline for the future development of superconducting machines and applied superconductivity.

Measurements and Analysis of AC Losses in HTS Windings of Electrical Machine for Different Operation Modes

The article is devoted to the study of losses in devices based on high-temperature superconductors of the 2nd generation. The complexity of the devices under study increases from a single rack coil

Characterization of HTS Coils for Superconducting Rotating Electric Machine Applications: Challenges, Material Selection, Winding Process, and Testing

The second-generation high-temperature superconducting tapes (2G-HTS) such as the REBCO coated conductors are known for their strong mechanical properties and high current carrying capacity with low

Review on the Use of Superconducting Bulks for Magnetic Screening in Electrical Machines for Aircraft Applications

An overview of different superconducting materials that can be used as magnetic screens for the inductor of high specific power electrical machines is presented.

Study of Induced Current in Closed HTS Magnets Under AC Fields: Simulation and Experiment

High temperature superconducting (HTS) magnets usually work in closed-loop mode to generate a stable magnetic field by carrying persistent currents, such as Maglev trains, machines and some projects

Barriers and Challenges Going From Conventional to Cryogenic Superconducting Propulsion for Hybrid and All-Electric Aircrafts

The development of electric aircrafts is becoming an important technology for achieving the goals set by the European Commission for the reduction of gases emissions by 2050 in the aeronautical

Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent

Non-insulation high-temperature superconducting coils provide a much lower risk of burnout in fault/abnormal conditions, such as hot-spot quench and overcurrent. This study employs an equivalent

Anatomy of a 20 MW Electrified Aircraft: Metrics and Technology Drivers

Major technologies and design trades for various components and system architectures are presented to provide guidelines and framework to address this grand challenge of electric drivetrain (EDT) designs that would significantly improve fuel burn reduction, design flexibility, and operational improvements in next generation of aircrafts.



Thermal analysis for the HTS stator consisting of HTS armature windings and an iron core for a 2.5 kW HTS generator

Most present demonstrations of high-temperature superconducting (HTS) synchronous motors/generators are partially superconducting, only installing HTS coils on the rotor as excitation windings. The

AC Losses of Superconducting Racetrack Coil in Various Magnetic Conditions

High-temperature superconductors have created the opportunity for a step change in the technology of power applications. Racetrack superconducting coils made from YBCO coated conductors have been

Development and testing of a 2.5 kW synchronous generator with a high temperature superconducting stator and permanent magnet rotor

High temperature superconducting (HTS) armature windings have the potential for increasing the electric loading of a synchronous generator due to their high current transport capacity, which could

Modeling and Electrical Measurement of Transport AC Loss in HTS-Based Superconducting Coils for Electric Machines

AC loss can be a significant problem for any applications that utilize or produce an AC current or magnetic field, such as an electric machine. The authors are currently investigating the

5 MW High Temperature Superconductor Ship Propulsion Motor Design and Test Results

American Superconductor has designed, built, tested and delivered to the U.S. Navy's Office of Naval Research (ONR) a 5MW, 230-RPM, 6-pole high temperature superconductor (HTS) ship propulsion motor.

Total AC loss study of 2G HTS coils for fully HTS machine applications

The application of HTS coils for fully HTS machines has become a new research focus. In the stator of an electrical machine, HTS coils are subjected to a combination of an AC applied current and AC

Design, Build and Test of an AC Coil Using $ \hbox{MgB}_{2}$ Wire for Use in a Superconducting Machine

Superconducting machines offer the significant advantage of smaller volume, lighter weight, and increased operating efficiencies compared with traditional electrical machines. To date,

An effective way to reduce AC loss of second-generation high temperature superconductors

Second-generation (2G) high temperature superconducting (HTS) devices have high power density and efficiency for energy applications. However, in alternative current conditions, the vortex movement

AC losses in coated conductors

Future use of coated conductors in electric power applications like transmission cables, transformers or fault current limiters is sensitive to the amount of dissipation in the AC regime. This paper

Superconducting Electromagnetic Launch System for Civil Aircraft

This paper considers the feasibility of different superconducting technologies for electromagnetic launch (EML) to assist civil aircraft takeoff to reduce the required runway length by increasing aircraft acceleration and improves overall aircraft efficiency through reducing engine design constraints.