3, the fan selects the characteristics of VFD-F inverter control
1) VFD-F inverter is easy to use, the menu interface is clear, and the parameters are easy to modify.
2) Energy saving
3) The impact on the motor is small, and the service life of the motor is protected.
4) Perfect protection functions such as thermal protection, over current, over voltage, under voltage, short circuit, phase loss protection, etc.
4, the wiring of the inverter
1) Basic wiring
Figure 3 wiring of the inverter
Wiring instructions, Figure 3 FWD, DCM is the start and stop control of the inverter; ACI1, ACM is the frequency wiring of the inverter; RA, RC is the alarm contact of the inverter. These lines are all connected to the PLC.
2) Debug parameters and instructions
Parameter number P | Parameter function | Defaults | Modified value | Description |
01-00 | Maximum operating frequency | 60.0 | 50.0 | |
01-01 | Maximum voltage frequency | 60.0 | 50.0 | |
01-02 | Maximum output voltage | 440.0 | 380.0 | |
01-05 | Minimum operating frequency | 1.50 | ||
01-06 | Minimum output voltage | 5.5 | ||
01-07 | Upper limit frequency | 60.0 | 50.0 | |
01-09 | First acceleration time | 10.0 | 30.0 | |
01-10 | First deceleration time | 10.0 | 30.0 | |
02-00 | Frequency command source | 00 | 01 | External terminal ACI control |
02-01 | Operational command source | 00 | 01 | External terminal control |
02-03 | Carrier frequency | 10 | Low value reduces electromagnetic interference but increases motor noise | |
03-00 | Multi-function output 1 | 00 | twenty three | RC1-RA1 is turned on when the frequency conversion fault alarm |
04-13 | Minimum ACI current | 4.0 | Minimum current value detected | |
04-14 | Maximum ACI current | 20.0 | Maximum current value detected |
5, summary
The control of the third-level biosafety laboratory fan is completed by the PLC and the inverter. Now the three-level biosafety laboratory requires both the control and the design of the fan to be controlled by the frequency converter. Due to the complexity of the laboratory control air volume, the frequency converter can maintain constant room pressure by adjusting the frequency under different conditions of use. Therefore, the use of frequency converters in three-level biosafety experiments will become increasingly important.
references:
1) Programmable Controller Operation Manual. OMRON Corporation, 1997
2) Delta's VFD-F inverter operating manual
3) GB19489-2008 General Requirements for Laboratory Biosafety China National Accreditation Center for Conformity Assessment 2009
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Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
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(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
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