This article proposes a design method of the high-speed multilayer interior permanent magnet synchronous motor (HSML IPMSM) employing ferrite (PM). Since maximum speed traction in this is 15 kr/min, mechanical stability must be considered. Additionally, case HSML IPMSM, as number PM layers increases, thickness PMs reduced to mechanically stable. On other hand, because has relatively low coercive force compared with Nd PM, an irreversible demagnetization IPMSM likely occur. Therefore, and...

This paper proposes the design method using a numerical formula known as Advanced Inverse Cosine Function (AICF) to reduce vibration of Interior Permanent Magnet Synchronous Motor (IPMSM). The proposed reduces by modifying rotor shape based on that makes air-gap flux density sinusoidal under certain load condition. radial electromagnetic force is source causing motor related Therefore, AICF which magnitude harmonic derived in this and due decreases applying AICF. To verify validity method,...

This paper presents an advanced method of selecting the number poles slots so as to reduce vibration a traction motor for gearless elevator system. The source, i.e., radial electromagnetic force, prototype was examined through its analytical derivation. expression indicated orders and frequencies force that caused by interactions within or between armature reaction permanent magnet fields including stator slotting effect. More specifically, with 14 18 displayed problem in terms at two times...

Electric vehicle (EV) systems require a high energy-efficiency traction motor so that the motors for EV should achieve efficiency and power density. Hence, permanent magnet synchronous (PMSM) using maximum slot occupation (MSO) coil has been investigated in this study. By applying MSO coil, torque density was achieved, but an additional loss, which decreases efficiency, incurred through alternating current (AC) resistance. To reduce AC resistance of following process performed: First, by...

This paper proposes a novel structure for the concentrated flux-type synchronous motor (CFSM) in order to improve torque density, as well vibration characteristics. First, conventional surface-mounted permanent magnet prototype electric booster brake system is investigated through tests. Then, relationship between characteristics and number of poles slots analyzed. Based on analysis results, pole–slot combination an improved CFSM determined enhance Furthermore, that employs three different...

To be used as a robotic actuator, surface-mounted permanent magnet synchronous motor (SPMSM) requires low cogging torque characteristic. The aim of this study is to analyze and reduce the torque's variation due assembly imperfection segmented stator that widely in SPMSM. Considering interconnection segments, an equivalent modeling method with introduced. In addition, caused by mathematically evaluated. Then, robust design process incorporates sensitivity analysis optimization proposed. By...

Surface-mounted permanent magnet synchronous motors (SPMSMs) usually adopt a retaining sleeve for ultrahigh-speed (UHS) applications. The has high electrical conductivity and cannot be segmented. Accordingly, the rotor eddy current loss is high. Moreover, higher loss, temperature. Therefore, should considered in design stage. However, generally calculated through three-dimensional finite-element analysis (3-D FEA) cumbersome because of computation time. This article proposes simple...

This paper deals with the post-assembly magnetization process of motors using ferrite permanent magnets (PMs). In order to meet needs mass production, most are magnetized post assembly. However, increasing complex shapes required maximize flux PMs. As a result, certain locations in magnet not fully by magnetizing fixture due insufficient magnetomotive force. Therefore, an analysis concerning is needed. this paper, concentrated spoke-type synchronous motor analyzed regard process. Owing more...

This paper proposes the estimation and improvement method of energy efficiency electric vehicle (EV) using wound-field synchronous motor (WFSM). For proposed methods, 1) an EV model as well mathematical are explained considering common Artemis driving cycle (CADC), 2) a control for achieving maximum is proposed, 3) evaluation methods circuit parameters losses described to predict accurate machine. Furthermore, based on design process WFSM improve system proposed.

This article presents the design process of a sensorless-oriented interior permanent-magnet synchronous motor (IPMSM) with concentrated winding, based on spatial saliency for traction in electric vehicles. The purpose method is to ultimately achieve both stable rotor position detection and acceptable torque characteristics such as cogging ripple. First, relationship between sensorless controllability electromagnetic parameters derived through mathematical considering drive motor. After...

The greenhouse effect is getting worse in these days. To reduce this environmental problem, emission regulation the automotive industries became strict. Accordingly, makers started to develop friendly vehicles such as hybrid electric vehicle (HEV) and (EV). In x-EV system, traction motor most important part act engine of conventional vehicle. design trend for EV high-speed low-torque with reduction gear. For reason, high speed operating condition should be considered process. paper, some...

Position recognition is one of the core technologies for driving a robot because differences in environment and rapidly changing situations. This study proposes strategy estimating position camera mounted on mobile robot. The proposed comprises three methods. first to directly acquire information (e.g., identification (ID), marker size type) recognize relative marker. advantage this system that combination markers different sizes or having may be used without update internal parameters even...

Conventional mechanical and hydraulic systems have been rapidly replaced by electromechanical systems. The demand for electric motors has significantly increased automotive parts. Nowadays, there are various types of permanent magnet synchronous (PMSMs) applied to chassis applications such as steering systems, boosters, brakes, more. components mainly designed surface mounted PMSMs (SPMSMs) because they a relatively simple rotor structure. However, the SPMSM low torque density its magnetic...

This paper presented the cost-efficient method to reflect AC copper loss when conducting characteristics analysis of EV traction motor using post-process 2-D magneto-static analysis. From magnetic vector potential as a result finite element analysis, distribution electric field intensity and current density by eddy in conductors were calculated. Then, considering input, actual was obtained, resistance calculated sequentially. With resistances along overall load conditions, synchronous...

The mobile robot is surrounded by various structures. Glass widely used for constructing walls and doors, it difficult robots to detect glass. Related studies consider the optical properties of glass when reconstructing position using LiDAR data. However, most them depend on SLAM (Simultaneous Localization And Mapping) or algorithm prior information about environment. This paper proposes a point cloud augmentation predict panel position. outlier removed with proposed local standard score,...

Considering effects of manufacturing tolerance on a performance, robust design optimization using surrogate model is applied for an electrical machine. When constructing the design, it can be required to reduce number variables because high computational costs. Therefore, sensitivity analysis method performance which affected by investigated in this paper. Analysis variance (ANOVA) employed analysis. An orthogonal array combination inner and outer used ANOVA. The proposed was interior...

This paper suggests a high efficiency design for an outer rotor type permanent magnet synchronous motor (PMSM). The key is to adopt V-shaped interior (IPMSM) considering two operating points, where their characteristics are different. To derive directions in the process, surface (SPMSM) analyzed. First, loss investigated, and limitation of SPMSM at low speed point presented. Then influences circuit parameters on each examined. From analysis result, having magnets arranged V-shape proposed...

This paper proposes a functional design to improve the torque transmission of wearable suit for walking assistance. The proposed includes soft actuator, lower-limb support module, and their fastening method. First, features functions actuator module are described. In addition, according elasticity fixed band relative positions band, method maximize performance was determined experimentally. Thus, an optimal derived, applying this developed.

The acoustic noise generated in a belt-driven integrated starter and generator (BSG) is recent issue. By many studies, it has been known that the can be caused by both radial tangential components of an electro-magnetic force. A six-phase claw pole machine widely used for BSG. In this case, due to its structural feature experimental condition, additional noises at frequency generated. paper, method analyze source prototype which type designed BSG was proposed. First, electromagnetic force...

In many countries, the demand for motors has rapidly increased. For equipment automation and energy reduction, are efficient machines play an important role in alleviating current crisis. However, rotary have been studied instead of linear machines. Furthermore, tubular induction (TLIMs) developed use industry, but characteristics these not analyzed. this study, using finite element methodology (FEM), a TLIM was examined ratio conductor thickness back iron. The design experiment (DOE)...