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Temperature rise is one of the main factors that affect the safe operation of electric vehicle. In order to improve the heat efficiency of the motor, the water-cooled motor of circular circumferential waterway for mini electric vehicle was studied as an object in this research, the structural parameters of the channel are optimized and analyzed from the following aspects: the width of the adjacent...
The evaporative cooling system for wind power generator inclines at an angle of 3∼5 degrees. Due to the special structure, it forms a liquid-gas two-phase self-circulation. Two-phase flow self-circulating system is a typical nonlinear dynamic system. So it is important to study the nonlinear characteristics. In this paper, the nonlinear characteristics were studied through theoretical analysis and...
In the inner evaporative cooling turbo-generator, the cooling medium flows in the hollow conductor of stator and the cooling system depends on the sensible heat and latent heat of cooling medium to achieve the cooling goal of generator. Due to each cooling medium has unique thermal properties, the flow characteristics of different cooling medium in the hollow conductors is disaffinity. In this paper,...
In this paper, a set of remote monitoring system is designed for the experimental platform of million kilowatt-class stator bars and bus bar whole evaporative cooling cycle model. The system data acquisition is based on the PXI architecture, the monitoring platform is based on LabVIEW, and the system has real-time signal acquisition, analysis and storage of pressure, temperature, flow and other signals...
In 2016, the licensee found that load sequence logics for the emergency diesel generator (EDG) of some Nuclear Power Plants (NPPs) in Korea were errors that can operate two component cooling water pumps (CCWP) in a train. The rated power of the EDG is designed with consideration for one CCWP. An increase of the load due to operation of two CCWPs can exceed the rated power of the EDG and cause a serious...
Rated power of a specific motor is highly dependent on cooling capacity for its own protection system. This paper addresses an effect of counter rotating vortices generated inside a weather-protected housing mounted over a IP23W motor, deteriorating thermal-flow characteristics. Generative process of the vortices was initially investigated with computational fluid dynamics and passive control device...
Overload performance of permanent magnet motor is very important for some special occasions, which has been generally limited by temperature rise of stator. This paper introduces a new method based on heat storage of phase change paraffin to enhance the overload performance of motor. The heat variation of motor was analyzed under overload process, and the key affecting factors were given to control...
The evaporative cooling technology has high cooling efficiency and high reliability and it is a promising cooling method which can be applied to switching mode power supply (SMPS). Thermal simulation is an effective way to analyze the performance of the cooling system, and can provide guidance for the optimization of SMPS. In this paper, thermal simulation models of fully-immersed evaporative cooling...
Air cooling motor in mini electric vehicle has high power density, internal heat sinking conditions are poor, thermal design and temperature control of the motor are put forward high requirement[1]. In this paper, the relationship between electromagnetic load and loss is deduced, the equivalent thermal network model of air cooling motor is constructed, and the regular of temperature rising distribution...
This paper investigates the thermal performance of a three-phase 10kW flux-switching permanent magnet (FSPM) machine used as an integrated starter generator (ISG) for hybrid electric vehicles, where the temperature rise experiments are conducted under different operating conditions. Also, the thermal analysis of the FSPM machine is simplified into one-dimensional steady heat conduction with two heat...
The utilization of asynchronous induction machines applied in railway traction drives is much higher than those used with industrial drives. Since this applies to both electromagnetic and thermal parameters, a multi-physics optimization with respect to electromagnetic and thermal behaviour will be introduced into the industrial design process. The discussed optimization approach consists of a sequential...
With the development of technology, The power density of permanent magnet synchronous motor application in aerospace is increasing rapidly. The integration of the machine with the power electronic converter and control system has many advantages such as high power density, high reliability and small size, etc. However the cooling design of it is challenging [1]. In this paper, the optimal design of...
There has been a growing need for high specific power electrical machines for a wide range of applications. These include hybrid/electric traction applications, aerospace applications and Oil and Gas applications. A lot of work has been done to accomplish significantly higher specific power electrical machines especially for aerospace applications. Several machine topologies as well as thermal management...
This paper proposes the study of the thermal management system of an energy storage system centered on lithium-ion capacitor (LiC). The investigated system is a LiC module made of 12 cells. A proposed passive thermal strategy has been designed in a 3D model using COMSOL Multiphysics. The strategy consists of integrating different cooling strategies, i.e phase-change materials (PCMs) and liquid-cooling...
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