2) Frequently, the inverter leakage alarm is faulty. It may be because the cable from the motor to the inverter is too long, or the cable enters the damp area under the well. Because the metal wire inside the cable and the ground at the cable form a distributed capacitance, the frequency conversion The high-frequency harmonics of the device still form a displacement current into the earth, even if the insulated cable is good. At this time, the following measures can be taken: reduce the carrier frequency of the inverter to reduce the displacement current value, increase the output reactor on the output side of the inverter to reduce the high frequency component in the inverter output circuit, and use the harmonic-free frequency conversion on the high-voltage motor. Device.
3) When an overcurrent fault occurs frequently, first check if the load on the motor is too heavy and increase the acceleration time.
4) When there is an overvoltage fault, increase the deceleration time.
5) It is often the case that the motor does not start up. You can try to change the torque boosting parameter of the inverter. In the case of a large static starting resistance, the automatic torque boost is used, and the pump fan can adopt the quadratic torque boosting method.
6) The inverter cabinet often has an over-temperature alarm signal. One reason is that the ambient temperature is too high at room temperature, and air conditioning equipment or ventilation equipment needs to be added. Another reason is that the heat sink on the inverter has dust or flying flocculation process, which needs to be cleaned regularly.
Litecoin is an online currency based on peer-to-peer technology and is an open source software project under the MIT/X11 license. It can help users make instant payments to anyone in the world [2]. Litecoin was designed and programmed by a programmer (Li Qiwei) who used to work at Google, and launched on January 9, 2011. Litecoin is an improved digital currency inspired by Bitcoin. The technical principle of Litecoin is the same as that of Bitcoin. It also adopts a decentralized architecture, without any central authority control, and the issuance of new coins and the transfer of transactions and payments are based on open source encryption algorithms, etc. These are all imitated the design principle of Bitcoin. However, Litecoin tries its best to improve the shortcomings that Bitcoin has shown before, such as too slow transaction confirmation, small total cap, the emergence of large mining pools caused by proof-of-work mechanism and so on, SHA256 algorithm [1].
Litecoin, which aims to improve Bitcoin, has three significant differences. First, the Litecoin network can process a block every 2.5 minutes instead of 10, thus providing faster transaction confirmation. Second, the Litecoin network is expected to produce 84 million litecoins, four times the amount of money issued on the Bitcoin network. Each litecoin is divided into 100 million smaller units, defined by eight decimal places.
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