A． The output voltage of the SPWM inverter is a series of pulses, and the pulse frequency is equal to the carrier frequency.
B. In the current of the motor, there is a harmonic component with a strong carrier frequency, which will cause the vibration of the motor core and announce the noise. If the frequency of the noise is equal to the natural oscillation frequency of the motor core and resonates, the noise will increase. In order to reduce noise, the inverter provides the user with the ability to adjust the carrier frequency within a certain range to avoid the resonant frequency of the noise.
C. The harmonic component of the carrier frequency has a strong radiation ability, which will cause electromagnetic disturbance to external electronic equipment.
D. From the perspective of improving the current waveform, the higher the carrier frequency, the smoother the current waveform. However, the stronger the electromagnetic disturbance to the outside world.
E. The higher the carrier frequency setting, the smaller the motor noise, but the greater the switching loss of the power equipment of the inverter itself, the more serious the heating of the inverter. The lower the carrier frequency setting, the louder the motor noise, but the smaller the switching loss of the power equipment of the inverter itself.
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The inverter should be installed inside the control cabinet, and the following problems should be paid attention to when planning the control cabinet:
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Fatal failure of LS power terminal block
From the point of view of application, the function that should be reached is: it is necessary to conduct the local area where the touch part should be conducted, and the touch is reliable. If the insulating part should not be conducted, it is necessary to insulate it firmly. There are three common fatal problems in terminal blocks:
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(2) ...
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The communication control of the inverter is a control method for the operation, speed regulation and status indication of the inverter through the communication interface of the inverter.
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LS Electric has been selected as one of the "Top 100 Global Innovators" for 10 consecutive years.
In Clarivate's recent statement, LS Electric was named one of the top 100 innovators in the world. The trophy handover ceremony was held in Anyang, LS Electric R&D Park, with Kim Yeong-geun, Chief Technical Officer of LS Electric, and Ahn Seong-sik, CEO of Clarivate Korea, acting as representatives of both parties.
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LG Inverter-LS Inverter-IGXA Sales
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