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Three-phase and single-phase AC synchronous and induction electric motors in ratings 0.18 kW (1/4 hp) and larger are covered in this guide. Primary emphasis is on the use of open or nonexplosionproof or nonflameproof enclosed motors in Class I, Division 2 and Class I, Zone 2 locations as covered in NFPA 70-2011. Surface temperature test methods and sine wave and non-sine wave applications are covered...
Flywheel battery is a new concept battery for storing energy in mechanical form, it offers some attractive advantages as compared to chemical battery for electric vehicles, such as high energy and power density, long cycle life and reduction of maintenance. This work designed an integrated flywheel battery with an axial-flux motor/generator which rotor is integrated with the flywheel. Mathematical...
To calculate the temperature of 31kW submersible motor of YQY114P-2Series, established the three-dimensional mathematical model of stator and rotor considering that the temperature of the lubricate oil is changing. To got the temperature distribution in map through calculating the couple field of temperature field and fluid field by the method of Finite Element Method. And also we make the comparison...
By using ODS technology, The vibration of a series-excited motor used in drum washing machine in the high rotation speeds (5000rpm, 7000rpm, 11000rpm) were investigated. Combining with the noise measurement results, the correlation between vibration and noise during high rotational conditions was preliminary discussed. It shown that, the vibration of the motor excited by the unbalance force of the...
Due to the slot ripples, there is often a strong additional torque which decreases the performance of electrical motor. In this paper, air gap flux densities of rotors with the pear-shaped slot, circular slot and trapezoidal slot are simulated and analyzed with ANSYS. The results show that the effects of the three kinds of shapes of rotors on the slot ripples are different, and the most inhibition...
The paper introduces an absolute orientation detection method for spherical motor based on machine vision. The code generation algorithm, image processing algorithm, image matching algorithm and the method of deriving the orientation of the rotor using unit quaternion are presented. The color pattern painted on the surface of the rotor and camera model are simulated in OpenGL .With the machine vision...
The steel laminations used in the stator core of electric motors and generators are electrically insulated from one another to reduce eddy-current losses. When a bearing failure results in friction between the rotor and stator, or a ground fault occurs, laminations are often fused together. Since traditional methods of core repair are labor-intensive, even moderate core damage may preclude economical...
In present article a dynamic model of universal motors, based on the design data is developed. Suppose the supply voltage is harmonic, but variable. After representing of the mathematical model a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of...
In present article a dynamic model of universal motors, based on the design data is developed. Suppose the supply voltage is harmonic, but variable. After representing of the mathematical model a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of...
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