Cooling system for electric motor of an electric vehicle. Evaporative systems are included in offtheplan largevolume standardised dwellings built on melbournes fringe. Common methods for providing cooling or heat dissipation in. Optimal cooling can lead to a significant improvement in the longterm performance of an electric motor. A wide variety of rotor cooling methods may be used, depending on the size, power rating, power density, machine topology, application, and continuous power rating or pulse power rating for duty. These coolers may also be used without water for ventilation purposes. May 11, 2012 methods of cooling of electrical machines 1. High electrical currents can generate significant heat loss in the windings. There are two basic types of evaporative air coolers eacs used to cool new mexico schools and. The inactive components, such as housing, front and rear endcaps, shaft, etc only complete the motor. This would be similar to the radiator system on an automobile engine. These methods include aircooling, cooling with coolants or refrigerants, and direct cooling or secondary cooling. The latter involves cooling the battery using an external lowtemperature cooler. Hile operating an electric motor, heat is generated due.
Evaporative coolers are used in residential and smaller systems in dry, hot climates. Before evaluating the impact of cooling, a baseline for the motor size must be established. Coolbreeze blog all your evaporative air conditioning news. Electric motor performance directly affects the overall performance of an electric vehicle ev. Simple cooling system configuration integrated into the main engine cooling system. They incorporate superior noise control technology.
Machine types, thermal limitations, cooling approaches, materials, and properties motor loss approximation methods finite element analysis fea and lumped parameter thermal analysis methods fea and lumped parameter oil jet cooling thermal performance correlations april 2011. Electric motor thermal management involves a multifaceted interaction of motor operating conditions, heat load distribution, material temperature limitations, passive thermal heat spreading, and active convective cooling. Electric ac motor and cooling fan video cooling on a conveyor ac induction motors are ideal for conveyor systems that operate continuously in one direction. Thermal control of power electronics of electric vehicles. The following image details the active magnetics that contribute to performance. The motor will restart automatically when it cools down. Experimental study of oil cooling systems for electric. Indirect evaporative cooling lowers the temperature of air via some type of. Whilst most home heating and cooling systems, do not mechanically bring fresh air into the house, evaporative air conditioning systems do.
Cooling of automotive traction motors newcastle university eprints. Experimental study of oil cooling systems for electric motors. A motor cooling system 10 for and electric motor 20 having a rotor 60, mounted on a rotor shaft 62 rotatable about a central axis and a stator 70, comprises a fluid nozzle 100 extending through an aperture disposed in said motor 20 having an inlet 104 oriented to allow a compressed cooling fluid, preferably compressed air, to expand rapidly therefrom and direct said cooling fluid. Initially, the benefits of evaporative cooling systems are restated in terms of improved engine efficiency, reduced co 2 emissions, and improved fuel economy. Thermal analysis of electric motors in engine cooling fan. This course covers 18 sections of comprehensive information on evaporative cooling towers and provides important aspects of cooling tower types, sizing, selection and performance issues. These systems operate by evaporating water into air and thereby cooling it. Electric motors are used in machines and processes all around us. Evaluation of evaporative cooling systems in industrial buildings article pdf available in international journal of heat and technology 333. As such, ev propulsion system requires cooling systems, not only to the electric motor but also to the battery banks in order to ensure efficient operation and maximizing the electric components and vehicle lifetime. The following two systems are used for cooling the i. Oil is introduced at each side of a 40 kw test machine to directly cool the stator coil endwindings. Possible evaporative cooling concepts are then classified.
Experimental study on the improvement of the thermal behavior of. About 20% of households in victoria have a unit, and about 60,000 units are sold each year. For the best cooling performance, if the pads are dry, prewet the pads by running the pump for a few minutes before starting the blower. Many households use conventional cooling systems as a backup to their evaporative cooling systems during these periods. You can find them in factories, automobiles, airplanes, robots and even your favorite dvd vending machine. It is this portion of the electric motor that is impacted by cooling. Course contents evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. Parker can cool the full range of wind turbinepower generation systems, including the converterinverter, reactor, transformer and generator with. Electric motor cooling industrial ventilation systems.
Therefore a major task in this project was to design a motor cooling system that was compatible with the constraints associated with motor design, integration and operation. Heat can effected the efficiency of motor,maximum load capacity,duty cycle and winding lifespan. Designed for evaporative coolers, pumps, and other devices in highmoisture environments. Commonly, windings cannot endure a higher temperature than 180 c. Liquid cooling can also be used to dissipate heat from an electric motor.
Heated primary coolant may be replaced by a new coolant at lower temperature or may be cooled by a secondary coolant in some form of heat exchanger. Thermal management of electric machines semantic scholar. The requirement was to provide consistent cool, clean air, with high volume and low static pressure. Evaporative cooling is common due to heavy marketing by the two or three companies that are heavily vested in it. An electrical motor is composed of some elements that can be affected by rising temperature. Thermal management in vehicles with electric drive system. Regardless of the application, managing heat dissipation is a common theme. Pdf comparison of different cooling fan designs for. Electric cooling fan 12v dc motor driven fan controlled by. The cooling system on liquidcooled cars circulates a fluid through pipes and passageways in the engine.
The motor above is a custom water cooled design by kollmorgen. That why heat from motor operation must be controlled by motor cooling. Loosen the motor mount bolts and slide the motor back until the belt is properly tensioned. Cooling systems and materials should be optimised to protect these elements. Electric motors are often selected based upon a particular work or load requirement. Cooling systems standard construction electric motors are closed and selfventilated with a fan mounted to the motor shaft which operates in both directions of rotation. The 3d computational fluid dynamics is the correct alternative for the analysis, concept and for the detailed design of electrical machines as it allows to precisely predict the flow structure around the stator coil ends, the distribution of the cooling medium, the pressure losses, the heat transfer coefficients and temperature distribution. One consideration of this selection process is managing. Pdf the present study focuses on the use of lubricating oil as a coolant for electrical motors. Cooling system components electric fan is mounted on the radiator and is operated by battery power. Thermal analysis of electric motors in engine cooling fan systems 2001011017 thermal study of electric engine cooling eec motors is conducted using 3d cfd and conjugate heat transfer analysis. If the ambient air density is good,it will effected for reduction of heat transfer from the electric motor. Hybrid cooling systems hybrid and electric vehicles typically use water pumps driven by an electric motor, as the pump must operate without the engine running.
In brief, 1234 studied the coupled ground water cooling systems, and focused on the main parameters that affect the cooling efficiency. The process takes place along a line of constant wet bulb. While the dye colors being used seem to have exhausted the rainbow, we hope most technicians have learned that the color of the antifreeze dye has nothing to do with the corrosion protection formula for the ethylene. Evaporative cooler motors electric motor warehouse. Use subcooled boiling in the coolingchannel to enhance the cooling of vehicle power electronics for hybrid and allelectricvehicles.
Menzel watercooled squirrel cage motors comply with protection classes ip 23 and ip 55 in accordance with din iec 34, section 5, whereby alternative protection classes are available on request. Thalackottore jose department of engineering and design school of engineering and informatics university of sussex, falmer, brighton, bn1 9qt, uk. To allow for operation of the machine in either direction of rotation, fans are usually of the bidi. Evap pads are made of a specially formulated cellulose paper. Electric motor, oil cooling, cfd, multiphase flow, fluid film, lagrangian multiphase flow. The second type of injection has been designed to supply oil. When warm, dry unsaturated air is pulled through a watersoaked pad, water is evaporated and is absorbed as water vapor into the air. The electric motor windings heats up when operated under extreme load and hence, reducing the efficiency of the vehicle. Apr 30, 2014 electric cooling fan 12v dc motor driven fan controlled by. Electric motor cooling ivs was contracted at one time to develop and design a specific cooling application for high horse power electric motors. How does the cooling system of an electric motor works.
Improper pulley adjustment will overload and burn out motor. Cooling fans can be utilized to aid in the drying process for manufactured parts. Thermo siphon system in this system the circulation of water is due to difference in temperature i. Overview all internal combustion engines are equipped with cooling and lubricating systems that work in conjunction with each other to promote efficient engine operation and performance. An additional advantage is that they are relatively small in size. Sme design and manufacture a range of water cooled electric motors to provide a alternative to standard air cooled vertical hollow and solid shaft motors,these motors are for variety of line shaft turbine applications. So the temperature is important factor to ensure the electric motor can operated smoothly without any problem. Unit 5 cooling systems of ic engines cooling systems. Chapter 6 cooling and lubrication systems topics 1. Evaporative coolers, often called swamp coolers, are cooling systems that use only. Cooling system components electric fan is mounted on the radiator and is operated by. Unit 5 cooling systems of ic engines cooling systems of ic. Experimental study on the improvement of the thermal behavior.
Sceptor will have two electric powered cruise motors one on each wing tip and a dozen smaller. Purushothama, in humidification and ventilation management. Phoenix manufacturing 0500703 14 hp evaporative cooler motor, 2speed, 120volt. Evaporative cooling design guidelines cedengineering. There are two types of cooling systems found on cars. An historical coverage follows of the proposed concepts dating back to 1918. Motor and pump have a grounded, molded plug and an automatic thermal overload switch which will shut motor off when it overheats. Types of evaporative coolers direct evaporative coolers use a fan to pull outside air through media pads that are kept. Below is several factors affecting rate of heat transfer for electric motor cooling.
Mar 03, 2017 the cooling system of electric motor or generator consists of water tanks, fans, pumps, thermostats thermostats, compensating kettle, the engine is a machine that converts other forms of mechanical energy from the cylinder block to the water lin. With liquid cooling ethylene glycol or other liquid cooling agent is circulated in or around the motor housing or coils to dissipate heat. Oil cooling of electric motor using cfd kamilla al shadidi approved 20140825 examiner bjorn e palm supervisor bjorn e palm commissioner semcon contact person federico ghirelli semcon abstract keywords. The evaporative cooling pad evaporative cooling pads evap pads are a product developed for horticultural and agricultural cooling applications. Types of cooling system in engine working and advantages. Many hybrid vehicles will have multiple cooling systems, one for the ice, internal combistion engine, and one for the electrical components and electric traction motor. The cooling system of electric motor or generator consists of water tanks, fans, pumps, thermostats thermostats, compensating kettle, the engine is a machine that converts other forms of mechanical energy from the cylinder block to the water lin. Because of the high power density of electric motors, the selection and design of the cooling concept has a big influence on the performance and efficiency of the engine. In the air cooling structure for the inwheel motor, an outer surface on the housing is provided with cooling grooves to increase the heat transfer area.
C engine require a cooling system because combustion of fuel takes place inside the engine itself. Mar 12, 2002 a motor cooling system 10 for and electric motor 20 having a rotor 60, mounted on a rotor shaft 62 rotatable about a central axis and a stator 70, comprises a fluid nozzle 100 extending through an aperture disposed in said motor 20 having an inlet 104 oriented to allow a compressed cooling fluid, preferably compressed air, to expand rapidly therefrom and direct said cooling fluid. C engines these days the necessity of cooling system in engine. Engine coolant temp ect switch ac select switch turns onoff at specific temperatures. The spray cooling technique has been previously used for cooling electronic components 9, 10 or for metal quenching 11, 12. While the dye colors being used seem to have exhausted the rainbow, we hope most technicians have learned that the color of the antifreeze dye has nothing to do with the corrosion protection formula for the ethylene glycolbased fluid. Cooling of electric motors used for propulsion on sceptor. Pdf experimental study of oil cooling systems for electric motors. Thus, the thermal model for the stator and for the rotor can be written as. This cooling system, per iec 600346, is designated ic411. Common methods for providing cooling or heat dissipation. Air gives up heat the latent heat of vaporization at the rate of roughly 2. Experimental study on the improvement of the thermal.
Numerical and experimental study of a sessile droplet evaporation. A 3d model of a smoke ventilation motor was created and a transient thermal analysis was carried out for assumed smoke temperatures up to 350 oc. Electric motor generated the heat from inductance process. Enclosure types and cooling motors are often exposed to damaging atmospheres such as excessive moisture, steam, salt air, abrasive or conducting dust, lint, chemical fumes, and combustible or explosive dust or gases. Evaporative cooler motor, motor design capacitorstart, motor enclosure design open dripproof, hp 112, nameplate rpm 1725, 56z frame, voltage 115230, 60 hz, 1 phase, 15. In general, the most applications rely on the use of evaporative cooling tower systems, which include wet cooling towers, cooling ponds or spray ponds.
In this article, we discuss the types of cooling system in engine. The present study focuses on the use of lubricating oil as a coolant for electrical motors. The second way consists of the cooling method by pulverization of a liquid spray. Evaporative cooler an overview sciencedirect topics. Principles of evaporative cooling system pdh online. Due to their compact designs, cooling types ic 81w and ic 86w airtowater heat exchanger allow increased motor power and optimal vibration damping. In all the years weve been reporting on cooling systems, weve never seen the antifreeze situation more confusing. Process by which heat resulting from losses occurring in a machine is given up to a primary coolant by increasing its temperature. As such, ev propulsion system requires cooling systems, not only to the electric motor but also to the battery banks in order to ensure efficient operation and maximizing the. Pump receptacle is for grounded evaporative cooler pump only. Electric motor, oil cooling, cfd, multiphase flow, fluid film, lagrangian multiphase flow this thesis investigated the heat transfer of internally oil cooled rotors in permanent magnet electric machines which are, among other things, used in hybrid vehicles or zero emission vehicles. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the inwheel motor for. The removal of the forced air cooling and replacement with a water jacket fed from the discharge of the pump ensures. Evaporative cooling is a process which takes advantage of the latent heat of evaporation of water to absorb sensible heat from the surrounding air with which it is in contact.
Electric ac motor and cooling fan video cooling on a. Pdf experimental study of oil cooling systems for electric. Cooling systems of ic engines types of water cooling system there are two types of water cooling system. Evaporative cooling an overview sciencedirect topics. Most commonly for ac induction motors, cooling air is usually circulated internally and externally by one or more fans mounted on the rotor shaft. Fresh outside air is drawn through watersaturated filter panels in the air conditioner, cooling the air through evaporation, just. Distribution automation handbook prototype power system protection 8. Electric ac motor and cooling fan video cooling on a conveyor. Cooling performance of 25 kw inwheel motor for electric. Phoenix manufacturings 14 hp, 120volt, 2speed evaporative cooler motor is built for reliable, long life performance and can be used for a new cooler or as a replacement motor for an existing unit. So in this system pump is not required but water is circulated because of density difference only.
355 545 430 1109 865 819 916 1176 1078 1150 379 282 1167 1050 1147 1289 404 137 689 531 958 825 61 373 1140 374 650 581 48 1420 153 538 1278 1255 820 1162 704 780 685 458 984 1231 1255 202 606 1471