M. Norhisam

• Universiti Putra Malaysia

The paper presents the evaluation study to enhance the design of the motor’s permanent magnet (PM), with the goal of increasing the performance of the segmented stator Permanent Magnet Synchronous Motor (PMSM). The rotor is externally mounted and embedded permanent magnet placed into the groove. By adjusting the width, tip angle, ratio dimension an...

To improve torque characteristics, this study proposes an upgrade over the standard salient pole stator in a Permanent Magnet Synchronous Motor (PMSM) using a segmented stator. The rotor is externally oriented and has a permanent magnet (PM) incorporated in it. The structure is studied theoretically through flux linkage analysis, torque production,...

A new triple rotor vertical axis wind turbine (VAWT) is presented to produce electricity efficiently in light winds. Rotors are designed to consume less consistent energy when moving to boost efficiency. The turbine comprises numerous adjustable dual blades, a frame component adjacent to the hub, and a revolving hub in the centre. Each blade has a...

The increased electrical demand in electrical machines promotes the improvement in power density in double stator systems. The power mapping performance and density of a novel type of interior embedded permanent magnet for a double-stator generator (IEDSG) is investigated in this work. This study investigates the basic attributes of the proposed IE...

This article proposed a detection scheme for three-phase Line start permanent magnet synchronous motor (LSPMSM) under different levels of static eccentricity fault. Finite element method is used to simulate the healthy and faulty LSPMSM with different percentages of static eccentricity. An accurate laboratory test experiment is performed to evaluat...

This article proposed a detection scheme for three-phase Line start permanent magnet synchronous motor (LSPMSM) under different levels of static eccentricity fault. Finite element method is used to simulate the healthy and faulty LSPMSM with different percentages of static eccentricity. An accurate laboratory test experiment is performed to evaluat...

This article proposed a detection scheme for three-phase Line start permanent magnet synchronous motor (LSPMSM) under different levels of static eccentricity fault. Finite element method is used to simulate the healthy and faulty LSPMSM with different percentages of static eccentricity. An accurate laboratory test experiment is performed to evaluat...

Electric Vehicles (EVs) are rapidly becoming an important facet in the drive for attaining sustainable energy goals. However, EV sales still constitute only a small proportion of vehicles in most countries. The expansion of DC fast-charging network will facilitate a sustainable transportation revolution by offering end-user a versatile choice to ch...

Palm oil sector is considered one of main economical contributions in countries such a Malaysia where approximately 6.1% of their Gross Domestic Product (GDP) is contributed. Low Oil Extraction Rate (OER) from poor quality fresh fruit bunches have led to a decrease the oil palm production. The traditional method of using human naked eye to inspect...

In this study, a cost-effective and non-invasive detection strategy is proposed for three-phase line start permanent magnet synchronous motor (LSPMSM) under mixed eccentricity fault using motor current signature analysis. In this respect, theory of air gap magnetic field in eccentric LSPMSM is presented. The detection strategy is examined through m...

The increasing prevalence and miniaturization of electronic devices has driven global efforts to develop small scale, self-sustaining, rugged and ecologically viable power sources. Nanogenerators, with the ability to scavenge ambient energy from the environment, offer an elegant solution to this need for small scale power sources. A major route of...

Vienna rectifiers have gained popularity in recent years for AC to DC power conversion for many industrial applications such as welding power supplies, data centers, telecommunication power sources, aircraft systems, and electric vehicle charging stations. The advantages of this converter are low total harmonic distortion (THD), high power density,...

This research aimed to analyse the linear launcher motor (LM) for the light electric vehicle (EV) application that generated a linear movement. LM will replace the piston engine and eliminate the internal combustion engine (ICE) issues namely engine weight and friction at piston wall. The finite element magnetic softwares (FEMs) for a magnetic fiel...

Magnetic gears (MGs) technology is studied widely among research institutions, with several improvements being documented. This development attracts a high amount of attention due to the demand in the development of magnetic gears towards higher performance than the conventional mechanical counterpart. In general, the design is complicated and ther...

Oil palm is one of the key industries highly observed in Malaysia, due to its high demand both whether locally or internationally. The oil extraction rate (OER) in palm oil production is used as an element to identify the performance of the mills, estates and producers. In view of this, there are specific instrument or sensor needs to be implemente...

Oil palm ripeness’ main evaluation procedure is traditionally accomplished by human vision. However, the dependency on human evaluators to grade the ripeness of oil palm fresh fruit bunches (FFBs) by traditional means could lead to inaccuracy that can cause a reduction in oil palm fruit oil extraction rate (OER). This paper emphasizes the fruit bat...

There are many factors affecting oil extraction rate (OER) but a large contributor to high national OER is by processing good-quality fresh fruit bunches (FFB) at the mills. The current practice for grading oil palm fruit bunches in mills is using human graders for visual inspection, which can lead to repeated mistakes, inconsistent evaluation resu...

This paper aims to study a triple flat-type air coil inductive sensor that can identify two maturity stages of oil palm fruits, ripe and unripe, based on the resonance frequency and fruitlet capacitance changes. There are two types of triple structure that have been tested, namely Triple I and II. Triple I is a triple series coil with a fixed numbe...

A wind turbine works with the principle of extracting energy from the wind to generate electricity. The power generated is directly proportional to the wind speed available. There are two major types of wind turbine design namely the horizontal and vertical axis wind turbine depending on the orientation of the turbine rotor and its generator. This...

This paper presents the power density evaluation and power mapping performance of a novel magnetic geared double-stator permanent magnet generator (DSPMG) which is proposed to address problems of mechanical geared generators for low-speed power generation applications. The operating principle is based on three PM rotors consisting of prime permanen...

It is widely believed that electric cars hold the key toward a greener mode of transport in the wake of an increased global energy consumption and greenhouse gas emission. However, on the downside, electric vehicles suffer from limited drive range and insufficient battery pack energy. Due to limited energy storage, effective power utility and energ...

This paper presents the design, fabrication and experimental power analysis of a novel double-stator magnetic geared permanent magnet (DSMGPM) machine which comprises of a double-stator permanent-magnet (PM) machine integrated a with triple rotor magnetic gear. The proposed machine can upscale the low-speed rotating magnetic field of the prime PMs...

This paper proposes a new approach to diagnose broken rotor bar failure in a line start-permanent magnet synchronous motor (LS-PMSM) using random forests. The transient current signal during the motor startup was acquired from a healthy motor and a faulty motor with a broken rotor bar fault. We extracted 13 statistical time domain features from the...

This paper proposes a new approach to diagnose broken rotor bar failure in a line start-permanent magnet synchronous motor (LS-PMSM) using random forests. The transient current signal during the motor startup was acquired from a healthy motor and a faulty motor with a broken rotor bar fault. We extracted 13 statistical time domain features from the...

High-efficiency motors are being gradually introduced in many industrial applications because of their positive impacts on the environment by reducing energy consumption and CO2 emission. In this respect, line start permanent magnet synchronous motors (LS-PMSMs) have been introduced recently. Due to their unique configuration, LS-PMSMs allow the ob...

Line start-permanent magnet synchronous motor (LS-PMSM) is one of the modern high efficiency motor introduced to the industry, recently. Like other types of electrical machines, various failures may happen in LS-PMSM during its life time. Among different failures which may occur in the motors with squirrel cage rotor, rotor fault (broken rotor bar)...

Recently, the electric vehicle has emerged as a powerful platform for mitigating energy crisis and reducing environmental pollution in the transportation sector. The major drawbacks of electrically powered automobile that limits its competitiveness with the internal combustion engine counterpart are the vehicle driving range and battery energy capa...

The paper aims to study the sensor that identifies the maturity of oil palm fruit bunches by using a flat-type inductive concept based on a resonant frequency technique. Conventionally, a human grader is used to inspect the ripeness of the oil palm fresh fruit bunch (FFB) which can be inconsistent and inaccurate. There are various new methods that...

This paper presents a novel double-stator permanent-magnet machine integrated with a triple rotor magnetic gear structure, which is proposed to address problems of mechanical geared generators for low-speed applications. Torque transmission is based on three rotors consisting of prime permanent-magnet (PM) poles in the middle rotor and field PM pol...

One of the high efficiency motors that were introduced to the industry in recent times is Line Start Permanent Magnet Synchronous Motor (LS-PMSM). Fault detection of LS-PMSM is one of interesting issues. This article presents a new technique for broken rotor bar detection based on the values of Mean and RMS features obtained from captured start-up...

A new control estimator to maximize the power generated with a maximum power point estimator is introduced. The power mapping characteristics from the double-stator generator are modeled as a mathematical equation which is used to develop the estimator for maximum power tracking to maximize the generated power. The proposed estimator automatically...

This paper presents a double-stator permanent magnet generator (DSPMG) integrated with a novel magnetic gear structure which is proposed to be used as a direct drive generator for low speed applications. Torque transmission is based on three rotors consisting of prime permanent magnet poles on the middle rotor and field permanent magnet poles on th...

Coil arrangement is one of essential part in electrical machine design that affects the torque performance of the machine. Thus, a new stator slot structure of permanent magnet machine called Independent Coil Excitation Permanent Magnet Motor (ICE-PMM) is introduced. Design and magnetic circuit analysis of ICE-PMM is presented. In addition, qualita...

Early detection of faults in electrical machines are imperative because of their diversity of use in different fields. A suitable fault monitoring scheme helps to stop propagation of the failure or limit its escalation to severe degrees and thus prevents unscheduled downtimes that cause loss of production and financial income. In this study, a surv...

Early detection of irregularity in electrical machines is important because of their diversity of use in different fields. A proper fault detection scheme helps to stop the propagation of failure or limits its escalation to severe degrees, and thus it prevents unscheduled downtimes that cause loss of production and financial income. Among different...

This paper presents performance comparison between spoke type and hollow-rotor permanent magnet generator (PMG) that could be used for low speed energy harvesting application. In this application, the requirement for such generator would be higher power density due to the limitation of space, volume and weight. The drawback of spoke type PMG is the...

This paper proposed a battery charging system for intermittent generation from a synchronous generator with a novel Maximum Power Point Tracking (MPPT) control method. Analyzing the generation with boost chopper by the state space averaging method, the internal voltage of the generator, the output voltage and the resistance of the output of the boo...

This paper presents a novel electrical power supply system for an isolated system using a matrix converter (MC). MCs are able to convert AC to AC power directly without DC link capacitors. In this paper the MC is used as the main conversion equipment, because arbitrary output, AC to AC and AC to DC, are obtained to use adequate switching pattern. I...

The Malaysia's average of oil palm production have been increasing every year since last two decades. This is due to the increase global demands. Therefore, it is an urgent need to improve the harvesting productivity in the field. For such reasons, a harvesting machine had been developed to overcome this problem. This harvesting machine consis...

Accurate condition monitoring prevents unexpected failures in electrical systems including induction machines, and hence improves their performance significantly. To enhance the reliability of condition monitoring systems, wireless sensor systems are developed. In the recent years, researchers have placed considerable emphasis on developing cost-ef...

To enhance the performance of stand-alone battery based system and to achieve the continuous power transmission, the behavior of multidirectional matrix converter (MDMC) has been analyzed in different operation modes. A systematic method interfacing a renewable source, a storage battery, and a load is proposed for a stand-alone battery based power...

This paper presents the control strategy structure to extract the speed torque characteristic for the newly designed three phase Multi Type Interior Permanent Magnet Motor. The proposed structure with the driving circuits exhibit the performance of torque characteristics of the stepper motor and brushless motor with independent coil winding per pha...

Design of cylindrical electromagnetic sensor is discussed. The purpose of this sensor is to detect a change in the conductivity or permittivity of the liquid. If the evaluation frequency is less than 100 kHz, skin effects would be negligible. The proposed sensor consists of two cylindrical sensors, a solenoid coil and a cylindrical capacitor. For a...

Electrical Motors are widely employed in both industrial and domestic fields. Line start-permanent magnet motor is one of the modern high efficiency motor introduced. During working of electrical motors, various faults, like stator faults, rotor faults, bearing's faults, occur that lead to malfunction of the motor. Among these faults, rotor fault,...

In this paper, finite element method is employed for diagnosis of static eccentricity in line start permanent magnet synchronous motor. The motor is modeled with different degrees of eccentricity. Stator current spectrum of healthy and faulty motor are analyzed using power spectral density technique. Amplitudes of harmonic components around fundame...

This paper is dedicated to investigating static eccentricity in a three-phase LSPMSM. The modeling of LSPMSM with static eccentricity between stator and rotor is developed using finite element method (FEM). The analytical expression for the permeance and flux components of nonuniform air-gap due to static eccentricity fault is discussed. Various in...

As the main exporter in the oil palm industry, the need to improve the quality of palm oil has become the main interest among all the palm oil millers in Malaysia. To produce good quality palm oil, it is important for the miller to harvest a good oil palm Fresh Fruit Bunch (FFB). Conventionally, the main reference used by Malaysian harvesters is th...

This study presents a new modulation method for multidirectional matrix converter (MDMC), based on the direct duty ratio pulse width modulation (DDPWM). In this study, a new structure of MDMC has been proposed to control the power flow direction through the stand-alone battery based system and hybrid vehicle. The modulation method acts based on the...

Detailed analytical and experimental approaches were performed to calculating the ratio of the pull-in thrust to the input power of High Density Transverse Flux linear Stepper Motor (HDTFLSM) with considerations of the electrical time constant, the mechanical time constant and the friction. The analytical approach involves the use of Fourier series...

The paper presents the energy density improvement using magnetic circuit analysis of the interior permanent magnet motor. The leakage flux from the conventional structure is improved with modified magnetic circuit to improve the energy and thereby the torque value. This is approached with a double stator structure design. The proposed structure is...

Palm oil has become the most consumed vegetable oil. In order to ensure its sustainability, the productivity of oil palms is targeted to increase by about 3.5% each year. Mechanization is one method to improve the oil palm productivity. Most activities in the oil palm process have been mechanized, and the mechanization of the harvesting process sti...

Among palm oil millers, the ripeness of oil palm Fresh Fruit Bunch (FFB) is determined through visual inspection. To increase the productivity of the millers, many researchers have proposed with a new detection method to replace the conventional one. The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the metho...

This paper presents the design of liquid detection sensor with low-frequency electromagnetic field. The purpose of this sensor is to detect a change in the conductivity or permittivity of the liquid. If the evaluation frequency is less than 100 kHz, skin effects would be negligible. This paper proposes sensor that consists of two cylindrical sensor...

Early fault detection of the induction machine is necessary in order to guarantee its stable and high performance. To evaluate the motor's health and detect existence of any failure in it, any motor parameter is first measured using condition monitoring techniques. The raw signal acquired is then interpret applying signal processing and data analys...

The paper presents the influence on torque characteristics of the outer rotor displacement in the double rotor reluctance motor. At the first stage the magnetic equivalent circuit of the machine is developed based on the magnetic circuit of the machine in each of the parts that describes their own reluctances. From the equivalent circuit at the par...

An optimal chopping strategy to enhance the ratio of pull-in thrust to input power for the high density transverse flux linear motor is presented. The high density transverse flux linear motor is a novel machine combining the characteristics of the high density linear motor and the transverse flux linear machines. The analytical approach presents t...

A Linear pulse motor is an actuator that provides linear motion without any motion translation. By using a linear pulse motor, linear motion can be produced with a high degree of efficiency. On the other hand, the linear pulse motor eliminates operational limitations and reduces the system complexity that is inherent to the motion translator. The l...

From the Malaysian harvester's perspective, the determination of the ripeness of the oil palm (FFB) is a critical factor to maximize palm oil production. A preliminary study of a novel oil palm fruit sensor to detect the maturity of oil palm fruit bunches is presented. To optimize the functionality of the sensor, the frequency characteristics of ai...

The introduction of the oscillatory torque inside the reluctance machine during its operation with the reduction the air-gap length is a major tumble it as a high torque density machine. A double rotor structure that embeds the dual air gap structure to maximize the flux linkage and thereby the torque generating capability is proposed. For efficien...

This paper presents a new controller design method using the coefficient diagram method (CDM) for matrix converters (MCs). MCs are able to convert AC to AC power directly without DC link capacitors. In this paper MCs are used in unified power flow controllers (UPFCs), which is one of the flexible AC transmission system (FACTS) devices located in th...

The electro-magnetic torque production in the reluctance machine is highly influenced by the magnetic linkages in the air-gap area. The conventional machines derive the drawback of reduction in the air-gap area to a minimal due to influence of mechanical unbalancing thereby restricting the effective energy conversion area. In order to increase the...

Currently, palm oil has become the most consumed vegetable oil type. This is due to an awareness of the effect Trans Fat has on human health. Therefore, increasing productiveness is a crucial factor to ensure its continued availability as a product in the marketplace. One of the processes that should be improved to increase productivity is harvesti...

Wind turbine works with the principle of extracting energy from the wind to generate electricity. The power generated is directly proportional to the wind speed available. There are two major types of wind turbine design namely the horizontal and vertical axis wind turbine depending on the orientation of the turbine rotor and its generator. This pa...

Conference code: 95813, Export Date: 19 August 2013, Source: Scopus, Art. No.: 6450194, :doi 10.1109/PECon.2012.6450194, Language of Original Document: English, Correspondence Address: Mailah, N.F.; Department of Electrical and Electronic Enginering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; email: na...

Wind turbine works with the principle of extracting energy from the wind to generate electricity. The power generated is directly proportional to the wind speed available. There are two major types of wind turbine design, namely the horizontal and vertical axis wind turbine depending on the orientation of the turbine rotor and its generator. This p...

Static measurement characteristics of the double rotor switched reluctance motor developed on the basis of double salient dual air-gap structure is put forward in this paper. The reduction of the air - gap length of the conventional machine is constrained by the mechanical intolerances that inherit the torque generating capability. Therefore there...

The paper describes the comparison of torque characteristics of ferromagnetic rotor double stator brushless DC permanent magnet motor (BLDC). Normally, most of researcher used non-ferromagnetic rotor in double stator topologies to avoid saturation and higher production of cogging torque due to unsymmetrical flux distribution. Furthermore, parallel...

With their highly robust nature and simple design, switched reluctance machines are finding their way into numerous modern day applications. However, they produce oscillatory torque that generates torque ripple and mechanical vibrations. A double rotor structure to maximize the flux linkage and thereby increase the torque generating capability is p...

This paper present the analysis on harmonics components of torque characteristics of single phase single stator small size Brushless DC permanent magnet motor (BLDC). The main objective of this paper is to analyze the harmonic components of the torque characteristics due to optimal air gap flux density and proposed serial magnetic circuit as altern...

Linear actuator are used to provide linear motion in the absence of a motion translator. By using the linear actuator, the linear motion can be produce with high degree of efficiency. Linear actuators can be designed with and without slots; moreover, there are various types of magnetization arrangements can be applied to the mover. In this paper, t...

Purpose The purpose of this paper is to describe a capacitive biosensor device consisting of an enzyme electrode and a simple detector which has been developed for histamine measurement. Design/methodology/approach In this analysis, degradation of histamine through enzymatic reaction produces signal that is monitored using a simple detector equipp...

E Cutter is a harvesting tool dedicated for oil palm fresh fruit bunch (FFB). It employed rapid chopping method and bunch harvest as it harvesting method. The E Cutter development was inspired by the usage of Cantas TM which currently efficient tool for oil palm FFB harvesting. However, due to height limitation that influences the operation of Cant...

The torque characteristic of the novel Multi Type Interior Permanent Magnet (MTIPM) motor that can be operated as permanent magnet stepper (PMST) and dc brushless motor (BLDC) configuration is presented. It briefly presents the structural characterization and the derivation of performance characteristics of the machine from the first principles. Th...

The comparative evaluation based on the power speed density of several types of portable Permanent Magnet Generator (PMG) considered for agricultural applications is presented. These generators are purposely designed to be used in agriculture sectors and thereby it should be of lightweight, small in size and ease to use. Six different generator top...

This paper deals with the reduction of cogging torque in a single phase brushless DC motor. The constructional features and operating principles of the developed motor is presented. Reduction of the cogging torque is achieved by the use of slit as flux barrier. By using slit to stable the flux density of the motor, the cogging torque produced by th...

The paper presents the torque characteristics of small size single and double stator of brushless permanent magnet DC motor (BLDC). The effect of different magnetic circuit towards the torque characteristic of permanent magnet motor is presented. Three different magnetic circuits are modeled using Finite Element Analysis (FEA) tool to simulate the...

A novel switched reluctance machine with a double rotor configuration is introduced in this paper. The proposed design is based on optimization of the electromagnetic forces, which leads to a better electro mechanical energy conversion process. Finite Element Analysis (FEA) is used to simulate the torque characteristics and the harmonic distortion...

The performance of an electrical generator using bio-fuel and gasoline blends of different composition as fuel in a single cylinder engine is presented. The effect of an optimized blend ratio of bio-fuel with gasoline on engine performance improvement and thereby on the electrical generator output is studied. Bio-fuels such as ethanol, butanol and...

This paper presents a Mobile Hall Sensor Array system for the shape detection of ferromagnetic materials that are embedded in walls or floors. The operation of the Mobile Hall Sensor Array system is based on the principle of magnetic flux leakage to describe the shape of the ferromagnetic material. Two permanent magnets are used to generate the mag...

This paper discusses the effect of inductive coil shape on the sensing performance of a linear displacement sensor. The linear displacement sensor consists of a thin type inductive coil with a thin pattern guide, thus being suitable for tiny space applications. The position can be detected by measuring the inductance of the inductive coil. At each...