Comparative Analysis of Energy Performance of Induction Single-Motor and Multi-Motor Traction Electric Drive
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Abstract:
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.Keywords:
Traction motor
Single-phase electric power
Universal motor
Wound rotor motor
Torque motor
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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We have developed a type of ac commutatorless motor which is a combination of a motor and thyristor controller. The rotor of the motor has neither a commutator, slip rings nor brushes. The motor can therefore be designed rugged for a high speed control. The motor may be most suitable for use in such an environment as with acid or alkaline gas and at locations where maintenance-free motors are most urgently required.
Universal motor
Wound rotor motor
Commutator
Motor controller
Motor soft starter
Synchronous motor
Squirrel-cage rotor
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Brushless direct current (BLDC) motor is widely used in small and medium side electric vehicles as it exhibit highest specific power and thermal efficiency compared with induction motor. The permanent magnets in the rotor create a constant magnetic flux, which limit the motor top speed. As the back electromotive force (EMF) voltage increases proportionally with motor rotational speed and it approaches the amplitude of the input voltage, the phase current amplitude will reach zero. By advancing the phase current, it is possible to extend the maximum speed of the BLDC motor beyond the rated top speed. This will allow smaller BLDC motor to be used in small electric vehicles and in larger applications will allow the use of BLDC motor without the use of multispeed transmission unit for high speed operation. Adjusting the phase angle will affect the speed of the motor as the each coil is energized earlier than the corresponding rise in back emf of the coil. Preliminary test results indicated that the motor top speed can be increased at least by 40 percent over the baseline speed at no load condition.
Universal motor
Wound rotor motor
Synchronous motor
Electronic speed control
Counter-electromotive force
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Citations (5)
This paper proposes new type multi-DOF motor called Hybrid multi-DOF motor. Unlike spherical motor, this multi-DOF motor has cylindrical shape. Also it has two separated motors to handle the rotating and tilting motion independently. The outer motor is used for rotating movement, and the inner motor is used for tilting movement. The hybrid motor and its two separated motors are shown. A hybrid multi-DOF motor is shown. It is composed of an outer motor and an inner motor. The outer motor is for 1-DOF rotating motion and it is outer-rotor type 3-phases BLDC motor. Also the design of the outer motor is not difficult because it is totally separated from the inner motor. Another motor in the hybrid multi-DOF motor is the inner motor. This motor is for tilting motion with 2-DOF. For the 2-DOF motion, it has 2-pairs of PMs(Permanent Magnets) and coils. The PMs is on the rotor. Also, the coils is on the support plate(stator). The rotor and the stator are connected by an universal joint. The universal joint helps the 2-DOF tilting motion smooth. Meanwhile, two opposite coils and PMs can make same direction torque.
Universal motor
Wound rotor motor
Torque motor
Squirrel-cage rotor
Synchronous motor
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Citations (1)
Abstract A new motor (ADTR‐motor: Anti‐Directional Twin Rotary Motor) for electric vehicle drive is proposed. A stator in a conventional motor is reformed to be movable, and the stator (outer rotor) and the rotor (inner rotor) rotate in anti‐directions. The IM‐type ADTR‐motor and the SM‐type ADTR‐motor are considered, and in this paper a prototype of the IM‐type ADTR‐motor is constructed experimentally. When the ADTR‐motor is used for an EV drive, the direction of one of the rotors should be reversed. Both rotors, when rotated in the same direction, propel the two wheels of EV. The torque of the wheels can be balanced without differential gear. The fundamental characteristics of ADTR‐motor are clarified. The characteristics are the structure of ADTR‐motor, the equivalent circuit parameters, the torque balance theory, the torque‐speed characteristics, the rotor speed transient characteristics, and the transient response under the speed sensorless torque control.
Wound rotor motor
Universal motor
Torque motor
Squirrel-cage rotor
Transient (computer programming)
Motor soft starter
Stall torque
Synchronous motor
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Citations (1)
A new motor, anti-directional-twin-rotary motor (ADTR-motor) for an electric vehicle drive is proposed. A stator in a conventional motor is reformed to be movable, and the stator (outer rotor) to rotate in the anti-direction of the inner rotor. Several types of ADTR-motor exist, such as induction motor and synchronous motor types. In this paper an induction motor-type ADTR-motor was experimentally constructed. When the ADTR-motor is used for an electrical vehicle, the direction of one of the rotors should be reversed, and both rotors rotate in the same direction, and propel the two wheels of electrical vehicles. The torque of the wheels can be balanced without a differential gear. The fundamental characteristics of the ADTR-motor are clarified, which are the structure, the electrical equivalent circuit parameters, the torque balance theory, the torque-speed characteristics, and the transient torque response under the speed sensor-less torque control.< >
Wound rotor motor
Torque motor
Universal motor
Synchronous motor
Squirrel-cage rotor
Motor soft starter
Stall torque
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Citations (11)
A new motor (ADTR-Motor: Anti-Directional Twin Rotary Motor) for electric vehicle drive was proposed. A stator in a conventional motor was reformed to be movable, and the stator (outer rotor) and the rotor (inner rotor) rotate in anti-directions. IM type ADTR-Motor and SM type ADTR-Motor are considerable, and in this paper a prototype of IM type ADTR-Motor was experimentally constructed. When ADTR-Motor is used for an EV drive, the direction of one of the rotors should be reversed, and both rotors, which rotate in the same direction, propel the two wheels of EV. The torque of wheels can be balanced without differential gear. The fundamental characteristics of ADTR-Motor are clarified, which are the structure of ADTR-Motor, the equivalent circuit parameters, the torque balance theory, the torque-speed characteristics, the rotors speed transient characteristics, and the transient response under the speed sensorless torque control.
Wound rotor motor
Torque motor
Universal motor
Squirrel-cage rotor
Transient (computer programming)
Stall torque
Motor soft starter
Synchronous motor
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Citations (2)
The Design And Contruction Of Electric Motor Cycle With 250 W 24 V Dc Motor Controlled By Dc Chopper
The rapid development of technology everyday has an impact on the environment, especially human. Technology is designed to facilitate and provide comfort to humans. This which makes the scientists increasingly triggered to develop increasingly modern technologies, one of them is transportation. Transportation that uses renewable energies and renewable natural resources is the electric motor cycle. This electric motor cycle is known as one of the eco-friendly technologies and uses electricity as its driving force. The electric motor consists of an electric motor as the main component of the propulsion, and the battery as the driving source. All of it is incomplete if not using a rotary speed controller of the electric motor to fit the needs of the electric motorcycle users. Electric motor are used brushed DC motor which has many advantages, especially in the controlling speed. The controller used in the form of DC chopper. DC chopper is a coverter of pure DC voltage into variable DC voltage so it can adjust the voltage on DC motor.
Chopper
Universal motor
Single-phase electric power
Braking chopper
Traction motor
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