Conveners
Wed-Mo-Po3.12 - Motors IX
- Qiuliang Wang (IEE CAS)
- Hao Chen (China University of Mining & Technology)
In this paper, a novel 3-phase 12/10-pole rotor-permanent magnet (PM) hybrid excited axial switched-flux (RPM-HEASF) machine is proposed and investigated, which exhibits high power/torque density, wide speed-regulation range, and good overload capability, and is interesting for electrical vehicle (EV) or hybrid EV applications.
The RPM-HEASF machine contains double-outer-stator and...
The use of a permanent magnet (PM) to achieve high performance and high efficiency in the modern motor and generator industry technology has increased rapidly. In the design process, one needs to consider the magnetic properties and the eddy current loss due to high conductivity in long term operating condition. Due to high eddy current loss the temperature of the permanent magnet increases...
To investigate the electromagnetic characterization of HTS coil under a travelling magnetic field, a no-insolation racetrack coil was wound with YBCO tapes. For comparison, another HTS coil which has the same geometric and structural parameters was wound with insolated tape between the layers. The coils were injected with DC current and a flat stator which has traditional copper windings and a...
Regarding a linear motion and forces the linear electric motors have a number of advantages over ordinary motors, the most obviously the lack of an intermediate gearbox to convert rotational motion into straight line motion saves energy. Essentially linear electric motors with conventional conductor (copper) coils are designed to produce high force at low speeds and the demand for these...
The surface-mounted permanent magnet linear motor (PMLM) is a good candidate for the application of urban transit due to its merits of high-power density and efficiency. However, this kind of machine needs a lot of permanent magnets (PMs) on the long stator structure, which is costly. To solve this problem, a novel PMLM has been proposed in this paper. The stator of novel PMLM has the...
Since only one tenth of the ore is deposited as rare earth elements, these elements are not common. However, these elements are constantly needed to be used to supplement the thermal demagnetization strength of the motor.
However, there are many cost variables and risks for continuous use of these elements, since these elements are mainly buried in only certain countries.
Recently, a lot of...
When designing a motor, the motor should be designed to withstand harsh conditions, for it to operate at any extreme environment. For the motor that uses permanent magnet (PM), its irreversible demagnetization is undesired characteristic that has negative effect on motor performance. As interior PM synchronous motor (IPMSM) is often used for high torque density generation, its operation...
Permanent magnets are largely classified into ferrite magnets, Alico magnets, and rare earth magnets. Ferrite magnets and Alico magnets are significantly less magnetic than rare earth magnets. Therefore, when a rare-earth magnet is used, it is advantageous in size and weight because it uses less magnet than other magnets. Particularly, in the case of a magnet used in a vehicle, it is necessary...
This paper describes the analysis on the Number of Axial Segments of Permanent Magnet in SPMSM for Ultra-High-Speed Application; Electric-Turbo Compound System(E-TCS) for Construction Equipment. E-TCS is a device that combines a turbocharger, which is a regenerative device through exhaust gas, and a compressor to improve the turbo lag. As a result, E-TCS must be able to drive at least 80,000...
Due to its stator robustness and the substitution of permanent magnets by DC field windings, the magnetless linear variable reluctance motor (MLVRM) possesses several advantages: high reliability, low cost and flexible flux regulation capability, which is a good candidate for rail transit applications. However, the MLVRM is essentially a doubly-salient machine, so there exists a drawback of...
Several tubular switched reluctance linear machines (TSRLMs) with transverse flux are proposed for improving thrust density recently. Owing to the particularity of the structure of transverse-flux TSRLMs, how to maximize the electrical utilization becomes a key to improve these machines’ performance. A novel three-phase transverse-flux TSRLM is proposed in this paper, whose stator sleeve is...
Synchronous electric machines with superconducting field windings have been around for a long time but have not gone beyond prototypes and very limited demonstrations. However, magnetic resonance imaging (MRI) systems use superconducting magnets that are made in significant volumes each year and run with high reliability. Leveraging significant technology advances in cryogenic systems...
A fundamental challenge with High Temperature Superconductors (HTS) is their high critical temperature (Tc) values and the stability that they impart when used in a magnet device with sufficient stored energy. Low normal propagation velocities and high stability of HTS wires cause localized damage due to an excessive peak hot spot temperature during a quench. Protection of HTS magnets for...
