Installation of industrial use of inverters and motor problems need attention - Inverter - Electrica

Installation of industrial use of inverters and motor problems need attention - Inverter - Electrica

In the industrial use of on-site, installation of inverters and motors can be roughly divided into three kinds of distance: The source of long-distance, middle distance and close. 20m ,20-100m within the close-medium distance, 100m or more for the remote.

In the industrial use of the site Inverter And Motor Installation can be roughly divided into three kinds of distance: The source distance, middle distance and close. Within the close-20m ,20-100m for the middle distance, 100m above the distance.

As Inverter Output voltage waveform is not sinusoidal, the waveform contains a large number of harmonic components, which makes high-order harmonic inverter output current increases, resulting in motor windings heat, vibration and noise, accelerated insulation aging, and may damage the motor; the same time harmonics of various frequencies to the space launch different programs from radio interference and may also lead to Other Equipment malfunction. So I hope the transducer placed in the vicinity of charged motor. However, due to space constraints the production site, often between the inverter and motor must have a certain distance. If the inverter and the motor in close to within 20m, can be directly connected with the converter; the inverter and motor for the 20m to 100m between the middle-distance connections, need to adjust the carrier frequency converter to reduce harmonics and interference; The motor on the inverter and more than 100m distance between the connections, not only to appropriately reduce the carrier frequency, but also to install the output AC Reactor .

In highly automated factories, the central control room can monitor all of the control equipment, inverter system, the signal should be sent to the control room, if the location of the center frequency converter control, total control of Taiwan, and between the inverter can be directly connected to the voltage signal through 0-5/10v and some switches to control traffic signals. However, the converter's high frequency electromagnetic radiation signal switch control signals on the weak will have some interference, not necessarily beautiful and neat, the transducer on the center control room. If the frequency converter and the center farther away from the control room, you can use 4-20ma current signal and the number of switching capacity for control connection; If the distance is farther, you can use rs485 serial Communicate Ways to connect; if also add long-distance, you can use communication among Relay The distance to 1km; if using fiber optic connector, you can reach 23km away. Communication cables used to connect, can easily form more and drive control system and to implement master / slave and synchronization requirements. And popular Fieldbus Connected to the system will greatly enhance the transformation rate. Central control room and the distance between the transducer enclosure extension, help to shorten the distance between the inverter to the motor in order to improve the layout with a more reasonable system performance.

Short install converter, you need to consider the center of integrated control room, a transducer, the distance between the three motors to minimize the impact of harmonics and improve control stability.

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