The aim of this paper is to design and investigate two fault-tolerant interior-permanent-magnet motors for high reliability operation. first one the spoke type, while second has V-shape magnets embedded in rotor. structures features both are presented optimal designs performed. electromagnetic performances, such as <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">$dq$</tex-math></inline-formula> -axis...

This paper proposes a novel tubular double-stator vernier permanent-magnet (TDS-VPM) motor for artificial hearts. The key of the proposed is and structures. Due to its structure, more PMs can be adopted in TDS-VPM useful harmonics air-gap flux density are increased, thus improving thrust density. Furthermore, double stator, namely inner stator outer has an appropriate 90° (electrical degree) angle difference. Since located inside mover, space fully used. Hence, enhanced axial direction...

This paper proposes a new type of motor with hybrid permanent magnet material (HPMM); termed HPMM motor. The key the proposed is excitations, which combined rare-earth PM (REPM) ferrite (FPM). To investigate extensively, motors parallel magnetic circuit (PMC) and serial (SMC) are designed. Because property difference between REPM FPM, both PMC-HPMM SMC-HPMM can offer low total harmonic distortion at high winding factor. Besides, needs consumption offers cogging torque, while extraordinary...

Sliding-mode observer (SMO) has attracted extensive attention in the field of medium- and high-speed sensorless control permanent magnet synchronous motor (PMSM) because its strong robustness stability. However, traditional methods are vulnerable to dc bias caused by measurement errors parameter changes. Therefore, this article, an improved SMO algorithm disturbance compensation is proposed. The unifies mathematical models surface PMSM interior PMSM. Besides, a bandpass filter (BPF) used...

To cancel harmonics and get fundamental back EMFs for precise rotor position speed estimations under short-circuit fault, this article introduces a new sensorless fault-tolerant control method 5-phase PMSM using sigmoid sliding mode observer (SSMO) with second-order generalized integrator (SOGI) to replace the LPF. For tuning SOGI, two different frequency estimators are proposed. First, closed-loop synchronous reference frame phase-locked loop (SRF-PLL) is fed SOGI adaptation based on...

This article proposes a practical design guide for linear electromagnetic actuator based on the concept of magnetic screw transmission, in which manufacturing and assembly technologies are investigated. The surface-inserted is first used to form required helical-shape pole, exhibits simple processing, high precision, robust structure. Moreover, different topologies developed using 3-D finite-element analysis aided design, with goal optimizing thrust force. In addition, number...

A magnetic screw motor integrated by a and permanent magnet synchronous offers high thrust density without friction loss. However, its internal structure is complicated, resulting in difficulty to control linear displacement track the given signal time even getting out of due interference. In this article, improve tracking performance anti-interference system, an active disturbance rejection controller (ADRC) adopted current loop makes up for nonlinear regional closed-loop system. To ensure...

Sensorless control methods based on flux observer have been widely used in motor drives with medium-high speed operation. However, the conventional some shortcomings estimation accuracy due to dc bias caused by integration, measurement, and parameter uncertainty. In this article, a new frequency adaptive disturbance band-pass filter characteristics is proposed. It insensitive high-frequency noise, hence improving robustness of system. Since proposed method has no phase delay at any...

The fully high temperature superconductor (HTS) motor can offer efficiency, small size, and torque density. However, the available HTS motors suffer from cost cooling system. There should be two systems for armature coils field coils, particularly, rotating coils. In this paper, a new stator-HTS is proposed. key of proposed that both are placed in stator. Hence, only one system needed. Meanwhile, all these stationary avoid rotated Then, reduced greatly. Moreover, since rotor structure...

This article proposes a new multi-mode high-efficiency fault-tolerant permanent magnet machine with an inner stator to place AC field windings. The <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</i> -axis current in the windings enables proposed be driven individually or together armature On other hand, flux can regulated by applying xmlns:xlink="http://www.w3.org/1999/xlink">d</i> As result, multiple operation modes are realized. run...

In this article, a new fault-tolerant control (FTC) strategy based on minimum torque ripple is proposed for triple redundant permanent magnet-assisted synchronous reluctance motor (PMA-SynRM) under single-phase and double-phase faults. Different from removing the faulty modules (single six-phase (S6) operation or single three-phase (S3) operation), makes full use of healthy phase modules. By precisely controlling <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper proposes a novel double-stator flux-modulation permanent-magnet (DS-FMPM) motor for electric vehicles. The key of the proposed is and structure. Due to its special design, more PMs can be adopted, useful harmonics air-gap flux density are increased, thus improving torque capability DS-FMPM motor. Since inner stator located inside, space fully used. absence windings on rotor, cooling condition improved. electromagnetic characteristics analyzed by using finite-element method,...

This article proposes a novel hybrid rotor flux-switching permanent magnet (PM) machine with low torque ripple. The of this is composed inverted T-shaped PMs and surface-mounted the teeth PM are designed modified shape. Compared conventional machine, arrangement proposed introduces additional air-gap flux density time–space harmonics based on modulation principle. Especially, these contribute to negative ripples further counteract positive ripple suppress total ripples. Furthermore,...

Abstract To suppress parameter mismatch and improve the output performance of model predictive control (MPC), a new robust virtual‐vector MPC strategy is proposed for five‐phase permanent‐magnet motor in this study. Firstly, incremental applied to remove impact flux mismatch. Then d‐q axis inductance sensitivity analysed, which produces current error between normal mismatched parameter. Based on error, cost function designed select voltage vector more accurately when occurs. Thus, good...

This paper addresses the problem of direction-of-arrival (DOA) estimation multiple wideband coherent chirp signals, and a new method is proposed. The based on signal component analysis array output covariance, instead complicated time-frequency used in previous literatures, thus more compact effectively avoids possible energy loss during hyper-processes. Moreover, priori information number no longer necessity for DOA method. Simulation results demonstrate performance superiority over ones.

This paper describes a high force density linear electromagnetic actuator for active vehicle suspension. The integrates an 18-slot, 8-pole permanent magnet (PM) machine and magnetic screw into single unit to achieve significantly higher compared the design employing actuation technology. leading parameters of motor part are optimized against given set specification. Furthermore, due difficulty in manufacturing helically magnetized pattern, more practical assembly radially segments is...

This paper describes the design and testing of a high force density linear electromagnetic actuator which explores magnetic gearing technology. The integrates screw with rotary motor is designed for active vehicle suspension. has superior thrust derived from free mechanic jamming. It has, therefore, great potential in number applications. To circumvent difficulties realizing helically magnetized structure, discrete, parallel-magnetized magnets are deployed along helical profile both...

In this article, a position sensorless control strategy for the five-phase interior permanent magnet synchronous motor (IPMSM) by injecting pseudo-random signal into third harmonic space is proposed. The conventional of IPMSM based on extracts rotor information high-frequency square voltage signals space. However, square-wave injection (HFSVI) produces loud audible noise. Different from HFSVI strategy, proposed injects simplified fixed-frequency phase-switching (SPRFFPS) to reduce To verify...

In this paper, a double-stator tubular PM (DSTPM) motor has been newly proposed, which two stators and one mover. The magnetic circuits of the inner stator outer are in series, thus reducing radial length. As result, volume can be saved, force capability improved. Its topology electromagnetic performance presented analyzed. order to accurately calculate cogging end proposed four-slot/seven-pole motor, three slot/pole combinations modeled analyzed, namely, 4-slot/7-pole, 8-slot/14-pole,...

This paper quantitatively compares two coaxial magnetic gears (CMGs) with parallel circuit and series circuit, which are artfully integrated into a permanent magnet (PM) brushless DC motor. By using the finite-element method, performances of both CMGs compared evaluated. Analysis results show that CMG can offer higher pull-out torque back-EMF than while has lower PM eddy current loss, iron losses distortion back-EMF.

This article presents a particular flux-leakage that utilized permanent magnet (FLUPM) rotor for ferrite spoke-type (STPM) motors to improve torque density. The key is build toroidal magnetic field (TMF) between the yoke and N-pole, TMF only formed by S-pole flux-leakage. In addition, enhance TMF, usage increased generate more Moreover, barrier reasonably designed prevent flux flow shaft. Thus, strong utilizing established. with shielding effect reduces N-pole leakage, forcing air gap. As...

In this article, the influence of atypical vibration source on hybrid rotor permanent magnet (HRPM) motor is analyzed. Accurate analysis and comparison typical contributions to are critical. First, changes in space-time order radial forces resulting from structure Meanwhile, total modulated force (TMRF) calculated based modulation effect. Next, a 3-D structural model developed verified for accuracy through modal experimentation. Then, sources analyzed, considering amplitude, order,...

The magnetic screw motor (MSM) drive systems often require both a rotary encoder and linear for their precise positioning, which makes the design of such very challenging costly. This paper proposes novel position sensorless control strategy. First, an improved pulsating current injection (IPCI) is proposed to replace encoder. method associates amplitude signal with <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</i> -axis by introducing...