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<p><strong>Understand the specifications and main parameters of the inverter</strong>:</p><p><br></p><p>1. Rated power of the inverter: the maximum power when the inverter is running, sometimes it is necessary to increase the capacity of the inverter according to the load and use environment.</p><p><br></p><p>2. Rated current: The inverter operation is the maximum working current, and the inverter current must be greater than the rated current of the motor used.</p><p><br></p><p>3. Rated voltage of inverter: working voltage of inverter. 220v, 380v, 660v, 690v, 1140v and high voltage inverter.</p><p><br></p><p>4. Inverter overload capacity: Fan and pump inverter overload is 120%, universal overload is 150%.</p><p><br></p><p>5. Can the various parameters of the inverter meet the requirements of use: Usually the basic functions of the inverter can meet the requirements of regular use, but some special industries need special functions, so they need to choose the corresponding special inverter.</p><p><br></p><p><strong>Reasonable selection according to load power and load type</strong></p><p><br></p><p>The load of the motor is different when the load is different, and the requirements for the inverter are also different.</p><p> </p><p>1.Fans and pumps are the most common loads: the requirements for the inverter are the simplest, as long as the inverter capacity is equal to the motor capacity (air compressor, deep water pump, sediment pump, fast-changing music fountain need to increase capacity).</p><p><br></p><p>2.Crane type load: The characteristic of this type of load is that the impact is large when starting, so it requires a certain margin of the inverter and has a magnetic flux vector function. At the same time, if you put your elbow under a heavy object, there will be energy feedback, so you need to use a braking unit or use a common bus.</p><p><br></p><p>3.Uneven load: Some loads are sometimes light and sometimes heavy. In this case, the inverter capacity should be selected according to the heavy load, such as rolling mill machinery, crushing machinery, mixer, etc. The inverter with magnetic flux vector function can be selected.</p><p><br></p><p>4.Large inertial load: such as centrifuges, punches, and rotary kilns in cement plants. Such loads have a large inertia, so they may oscillate at startup and have energy feedback when the motor decelerates. An inverter with a larger capacity should be used to speed up the start and avoid oscillation. Cooperate with the braking unit to eliminate the feedback energy.</p><p><br></p><p>5.Long-term low-speed rotation, due to the higher heat generation of the motor and the reduced cooling capacity of the fan, it is necessary to increase the reduction ratio or switch to a 6-level motor to make the motor run near a higher frequency.</p><p><br></p><p><strong>Reasonable selection according to the use environment (dust, temperature, humidity, altitude, corrosive gas)</strong></p><p><br></p><p>The cause of the frequency converter's bad frequency has a great relationship with the use environment, mainly the following:</p><p><br></p><p>1. Conductive dust and dust such as metal.</p><p>1) Too much conductive dust such as metal causes a short circuit in the main circuit.</p><p>2) The dust is clogged and the temperature of the cooling fin is too high, causing tripping and burning.</p><p><br></p><p>2. Corrosive gases</p><p>1) Toggle switch caused by corrosive gas, poor contact of relay.</p><p>2) Short circuit between crystals caused by corrosive gas</p><p>3) The main circuit is short-circuited due to terminal corrosion.</p><p>4) Short circuit between devices caused by corrosion of circuit board</p><p><br></p><p>3. Condensation, moisture, and moisture.</p><p>1) Discoloration of the gate due to moisture causes poor contact.</p><p>2) Fire between the copper plates of the main circuit board due to moisture.</p><p>3) The internal resistance of the inverter causes electrical corrosion and disconnection.</p><p>4) Discharge breakdown caused by condensation in the insulation paper</p><p><br></p><p>If your environment has the above factors, use the most effective measures:</p><p>It is recommended to use Aosheng fully sealed inverter, which can be waterproof, dustproof and anticorrosion, which can greatly reduce the failure rate and prolong the service life of the inverter. Run in the best use state.</p><p><br></p><p><strong>Other factors</strong></p><p>Don't just look at the price. Some inverters have low prices, but the quality and performance are extremely poor. It cuts corners, has a short lifespan, few parts, and is difficult to repair. If you replace the entire new circuit board, the repair cost will be sky high. Some companies can promise warranty service, but your inverter may have to be shipped to cities thousands of miles away, and it will take a month or two to repair it. Although some<a href="https://www.vectorque.com/products" rel="noopener noreferrer" target="_blank"> frequency converters</a> are famous brands, they are very squeamish, and they need a good environment to have good quality. Some frequency converters are equipped with components that are “exclusive and exclusive”, which are difficult to buy and have a high price, which leads to high maintenance costs. Another problem with poor-performance inverters is that they are very serious once burned, and have almost no repair value. The failure rate of inverters is relatively high, so it is necessary to know whether the maintenance is convenient when purchasing, such as whether there is a maintenance service center near you , Is the inverter module universal and easy to buy? If a certain frequency converter is used in large quantities, it is best to buy one or two more as a spare. If your frequency converter is used for simple speed control, please choose the economical series with relatively cheap price.</p><p><br></p><p><strong>In a word: </strong></p><p>Only by choosing the correct inverter, can the inverter you purchased be used normally with low failure rate and long service life. Maximize your investment income.</p>
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