The review of High Power Density Motor (HPDM) is presented, the high power density refers to ratio of output power to volume of the motor. As a result even a small envelope motor can have high power output. HPDM are also known as low speed high torque motors. The HPDM are compact, lightweight, has high torque and less cogging torque, finding application in automotive field, especially in electric and hybrid electric vehicles. This paper analyses the design, performance and efficiency of various HPDM. Comparative analysis of thirteen different HPDM are reviewed and tabulated for power density, speed, weight, rating and its applications.

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Double Sided Linear Synchronous Reluctance Motors (DSL-SynRM) are being increasingly used in high force density applications. The force ripples are one of the major issue in machine which is due to nonlinear nature of current in the machines. This paper focuses on the reduction of force ripples for increasing the force density of the motor. In order to reduce the force ripples, DSL-SynRM with a skewed translator is proposed. The proposed structure is designed and developed by using computational magnetic tools. This concept is effective for reduction of the force ripples and improves the force density of the machine. The proposed design has been reduced the percentage of force ripples by 21.62 %, improved the force density by 10.32 N/mm³ and efficiency by 0.89%.

Monitoring the flow rate of low conductive fluid is critical in sectors such as waste, culinary, chemical, pharmaceutical, oil and gas, and power. The flow meter can be used to measure several parameters like flow rate range, fluid electrical conductivity, cost and the scenario of desired monitoring. The existing invasive flow sensors for monitoring the velocity of conductive fluid are often associated with undesirable attributes of being obstructive, prone to interference effects, corrosion, significant pressure reduction, and energy loss in pipe systems causing severe and long-term damage to pipes during installation. This paper presents a comprehensive survey of various non-invasive methods for characterizing low conductive fluid flow based on the sources of strong magnetic and electric fields. This review discusses fundamental insights for understanding the physical phenomenon in the generation of eddy currents, Lorentz force, and the formation of the electric double layer with pertinent illustrations and discussions. The review presented in this paper concludes that each non-invasive measurement technique has limitations based on the excitation source of either magnetic or electric fields. Different values of low conductivity of fluid flow and flow velocity have been considered in various studies to get an in-depth understanding of the capability of selected techniques so that their scope and versatility can be researched further. This paper also highlights that emerging technologies like cryostats with superconducting magnet systems, which unquestionably exceed the mass limitation, have become viable in applications such as Lorentz force velocimetry.

Induction motor usage is increasing drastically due to new entrant of electric vehicle, traction and propulsion systems at present. Temperature of electric motors are significantly affect its parameters. Since, resistances variation of stator and rotor winding are depend on temperature, the torque speed characteristics also affects in the induction motors. In this paper, a innovative approach is proposed to arrive the relation of temperature on torque. Thermal analysis of 160 L-frame induction motors is carried out using Finite Element Method (FEM) under various load to obtain temperature. The mathematical relationship between temperature and torque is arrived using curve fitting technique. The expression arrived in this method is used to predict the torque for a given temperature of SCIM.