Hsw embroidery machine in chennai , perambur, mylapore, madipakkam - VS SewingMachine
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We describe the development of a
permanent-magnet (PM) brushless DC motor for driving high-speed
embroidery machines by employing advanced design and analysis
techniques. In the design of the motor, magnetic field finite-element
analyses accurately calculate the key motor parameters such as the
air-gap flux, back electromotive force (EMF), and inductance. Using the
numerical magnetic field solutions, a modified incremental energy method
calculates the self and mutual inductances of the stator windings. A
phasor diagram is derived to compute the motor's steady-state
characteristics. To predict the dynamic performance and increase the
prediction accuracy, a Simulink-based model simulates the motor
performance with the real waveforms of applied phase voltage, back EMF,
and current. The motor prototype tested with both a dynamometer and a
high-speed embroidery machine validated the theoretical calculations.
To predict the motor performance, a phasor diagram withthe sinusoidal waveforms (e.g., the fundamental components)of the applied phase voltage, back EMF, and current is de-rived under the optimum BLDC control condition. However,this method cannot predict the dynamic performance and thecalculated steady-state characteristic is only an approximateas the harmonics are not taken into account. Therefore, a Simulink-based simulation model is also built to simulate themotor performance with the real waveforms of the appliedphase voltage, back EMF, and current.jack sewing machine price in chennai,perambur, mylapore, madipakkam
The rise rate of armature current is limited by the windinginductances, and this may affect the output performance of themotor, especially when operating at high speed. Therefore, it isnecessary to investigate whether or not the motor can reach therequired electromagnetic torque and speed at a given voltage.This is studied by the proposed simulation model.The developed motor prototype has been fabricated and testedwith both a dynamometer and a high-speed embroidery ma-chine. Theoretical calculations are validated by the good agree-ment with the experimental results .
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