PdII: Piezo-electric motors and their applications
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Abstract General properties of piezo-electric motors are explained. A short review of their historical development is given. Limiting factors for the power of piezo-electric motors are discussed in comparison to standard electromagnetic motors. Aspects for the choice of piezo-electric materials for motor applications result from these limits.Keywords:
Limiting
Single-phase electric power
The use of the concept high-power motor for driving motors in electric motor vehicles is explained with the aid of speed-traction diagrams. The limiting electric and mechanical quantities are surveyed. The development of locomotive motors is described by means of an illustrative example dealing with multi-purpose locomotives for the Swiss railroad system. Advantages of collectorless three-phase traction motors are pointed out.
Traction motor
Single-phase electric power
Limiting
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The aim of the work is to carry out a comparative analysis of the energy indicators of induction single-motor and multi-motor traction electric drive based on the assessment of energy losses in traction induction electric motors of different power when using frequency control, which ensures the speed regulation of traction induction electric motors with constant magnetic flux. As a result of the analysis, a formula was obtained that allows to determine the number of low-power motors that are part of a multi-motor electric drive, in which the energy effect will be provided from the use of a multi-motor electric drive instead of a single motor electric drive.
Traction motor
Single-phase electric power
Universal motor
Wound rotor motor
Torque motor
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The use of the concept high-power motor for driving motors in electric motor vehicles is explained with the aid of speed-traction diagrams. The limiting electric and mechanical quantities are surveyed. The development of locomotive motors is described by means of an illustrative example dealing with multi-purpose locomotives for the Swiss railroad system. Advantages of collectorless three-phase traction motors are pointed out.
Traction motor
Single-phase electric power
Limiting
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The production and use of electric vehicles (EVs) are becoming widespread. The negative effect of fossil fuel vehicles to environmental pollution also increases incentives and demand for electric vehicles. One of the most important equipment in electric vehicles is the electric motors. The characteristics of the electric motors (EMs), change according to the usage area and power of the electric vehicles. There are some structural changes to the electric motors used for small powerful electric vehicles and electric motors produced for medium and large powerful vehicles. Depending on the power and structure of electric motors, the characteristics of the drives that control these motors also change. In this study, the structure, types, operating characteristics of the small, medium and large powerful electric motors used in electric vehicles and the motor driver circuits required to running the motors are mentioned.
Single-phase electric power
Traction motor
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We buy and sell new and used motors, electric motors, flange motors, synchronous motors, three-phase motors (motor, electric motor, flange motor, synchronous motors, three-phase motor). (new, used, wanted, buy, sell)
Synchronous motor
Universal motor
Traction motor
Single-phase electric power
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Compared with internal combustion engine vehicles, the trend toward electric vehicles that do not pollute the air, are highly efficient, and require less maintenance is increasing. In parallel with the increasing trend toward electric vehicles, research studies to provide optimal performance in electric vehicles are gaining speed. The choice of motor used in electric vehicles is a very serious decision as it will affect all the performance data. In the selection of the motor used in electric vehicles, simple design, high power density, low maintenance cost, and easy controllability features come to the fore. In electric vehicles, different types of electric motors are used according to the designer’s preference, including DC motor, brushless DC motor, induction motor, permanent magnet synchronous motor, and switched reluctance motor. Although different types of motors used in electric vehicles are included in the literature, induction motors are ahead of other types of electric motors in the market with their simple structures, high power density, durability, low cost, and advanced speed control techniques.
Single-phase electric power
Traction motor
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Citations (1)
The ideal characteristics of an electric motor drive for traction application in an electric and hybrid electric vehicle are high torque at low speed region for fast acceleration, hill climbing and obstacle negotiation, and low torque at high speed for normal driving. To minimize the power rating of the motor drive, therefore, the energy storage power rating, at the given vehicle performance, the electric motor drive is required to have a long constant power range to meet the torque and speed demand. In this paper, the effect of the motor characteristics on the vehicle performance is analyzed, and the characteristics of three major electric motors-induction motor, permanent magnet brushless DC motor and switched reluctance motor are investigated.
Traction motor
Universal motor
Wound rotor motor
Motor soft starter
Single-phase electric power
Reluctance motor
Torque motor
Squirrel-cage rotor
Motor controller
Synchronous motor
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With the recent development of electric drive technology, systems with multiple electric motors are increasingly used in various applications. Among them, methods of driving multiple electric motors by using only one power source is studied. This multi-motor drive system contributes to the reduction of the number of power supplies and electric parts. Because of these characteristics, the system is effective in reducing the weight and the size of whole system. Therefore, this paper proposes a circuit that can control motors by frequency separation using the principle of amplitude modulation. As a result, it is possible to drive a plurality of motors independently and simultaneously with only one power supply. The simulations of multiple motor drives by the proposed circuit was conducted.
Single-phase electric power
Motor soft starter
Modulation (music)
Synchronous motor
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The pole -changer -free electric motor technology, which connects tile large synchronous electric motors with the electric network through frequency -ehangers and uses fedback signals of magnetic pole position of rotors to achieve closed -loop control, enables large synchronous electric motors to achieve stepless smooth speed regulation as direct-current electric motors. The maximum single motor capacity has gone up to 100 MW so far with a limit capacity of 250 MW, and it has a great prospect application in the electric power and transmission industry.
Single-phase electric power
Synchronous motor
Position (finance)
Universal motor
Traction motor
Alternating current
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This project is about controlling the switching of DC and AC motors. The DC motor has large starting torque compare to AC motors and therefore they always used as starting motor to move the electric vehicle. On the other hand the AC motors is consider maintenance free and suitable for electric vehicle as well. It is common practise to put these motor in an electric vehicle. This project applied how to operate electric train. The speed of the train is varied by moving the voltage control on the transformer panel. The higher the voltage, the greater the speed. Some transformers provide at least two different voltage ranges. The lower range is used for light trains the higher range for heavier trains. The problem is how to switch ON and OFF both motors when is required. This project will switch ON DC motor first and after certain speed which is will set by user and without considering the load AC motor is ON automatically. If the speed is lower than set value the DC motor will still ON. Both motors are running simultaneously once the temperature reached at certain value (set by user). The motors back to normal sequence of operation temperature of both motor back to normal. The controller also controls the forward and reverse direction of the motors.
Universal motor
Motor controller
Motor soft starter
Traction motor
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