The profound impact of Huawei's technology school on domestic inverters is revolutionary. In that era when small private bosses were desperately trying to play in the high-tech industry with half a set of immature solutions. Huawei is already working on multiple series of complete solutions. The two research institutes are respectively working on the underlying architecture of the VF inverter TD2000 and the current vector inverter TD3000. They are working on the basic levels of software such as chip architecture, algorithms, and functional programs; from the circuit principle The derivation, device level, circuit board design, raw material brand selection, almost created the first complete set of reports for the Chinese inverter industry, and the MEC specifications of the complete machine were in line with the European inverters at that time. The landmark event is that domestic inverters finally have the opportunity to make stable high-power inverters without purchasing Ximenkang's driver board. Therefore, we have worked hard and started from the lowest level. Our unremitting efforts have led to the success of domestic inverters. The price of Huawei inverters can also be as strong as imported European and Japanese brands, and the price is significantly higher than Taiwanese series and Korean series. Inverter brand. The editor believes that the sale of Huawei's inverter business to Emerson at that time was not cost-effective from the perspective of the development of domestic inverters, because it would be many years before Inovance Technology, Blue Ocean Huateng, Megmeet, etc. would have the opportunity to sprout. Senior brothers, otherwise those guys would definitely be even more awesome than they are now. This is a watershed. The Chinese have a full range of full-power inverter designs, and this is a blueprint that has the opportunity to make the inverter more stable. Nowadays, everyone's requirements for domestic inverters are very high, which proves our progress, but in 2002, you should not expect a 2% failure rate in inverters.

In those years, the main promotion method of domestic inverters was energy saving. Most users installed inverters for energy-saving renovation, hoping to save electricity and recover costs in 3-5 months. It would not matter if the inverter broke later. , because such advanced and magical equipment is almost free of charge after the cost is recovered. Users are also happy to see the results, and they feel full of satisfaction in taking advantage of it. At that time, energy-saving renovation companies came one after another, and the energy-saving renovation of an injection molding machine was 1,800 yuan/KW; the energy-saving company with an electric meter shared the saved electricity bill with the user 7:3 in the first half of the year, with one reduction at a time. The contract period is generally 3 years, and a 315KW The story that energy-saving renovation of frequency converters can make an energy-saving renovation company prosper is still vivid in our minds. So it doesn’t matter whether it’s bad or not, as long as it saves money, everything is fine! Energy-saving companies are generally leather companies. How many people can afford 150,000 to buy a 200KW imported inverter? So the opportunity came for domestic inverter manufacturers to knock on a copper plate with an iron case, make a power board, and buy IGBTs. Infineon did not exist at that time, and Ximenkang’s 3-piece driver board cost 1,500 yuan * 3 = 4,500 yuan. , so domestic inverters with a capacity of more than 200 kilowatts came out, but Chinese people are still more cautious. Generally, high-power inverters have to run with load for 72 hours before leaving the factory, and such a large machine manufacturer basically agrees to on-site debugging. Domestic inverters A 200KW machine costs 50,000 yuan +, and the customer level also costs tens of thousands yuan more. It was still quite profitable at that time. Therefore, it was normal for the inverter to break down again in 2000, so I contacted the customer, analyzed the problem, and started repairing the machine after a lot of rhetoric. The inverter manufacturer's salesmen, service engineers, and R&D personnel just stayed up late at night to analyze the problem. To improve the product, work hard to identify the 5 possible reasons among the 20 most likely causes. Salesmen usually don't forget to talk about things during the mid-year and year-end summaries. Wei Wei's sales performance is poor and he finds some excuses. The boss listens to similar reports tirelessly and has no temper, because the products in those years were indeed like this.

 I have been exploring the domestic inverter industry for 20 years. From the time when inverters were mainly promoted as energy-saving, to today, inverters are a must-have accessory for electronic control in the machinery industry. The methods used by everyone to sell them have changed the deep-seated anatomy. The selling point of the product is to explain the essential issues of the product to customers. At present, the salesperson in the industry talks most about why our product is good. To put it simply, it is no longer marketable. Around 2000, domestically produced inverters mainly relied on a certain university or a few people, who took advantage of the opportunity of industry-university exchanges to bring back two sets of inverter solutions from foreign technical exchange venues, and deduced the schematic diagram and selected components at home. For PCB processing (manual welding), if there is no source code program, you can only enter an unmodifiable application package, and you accidentally start the machine. In addition to excitement, facing such advanced high-tech products, my heart aroused the desire to make money, so I found the first batch of high-tech entrepreneurs in the industry to start a business together. Shenzhen is a good place. As long as there are opportunities, there will be people who dare to do it. As a result, frequency converters have developed rapidly in Shenzhen, a city that was only relatively developed at the time but absolutely open. Puzhuan, Anbangxin, etc. are also slightly famous, and Jialing has been divided into several companies. This time, Senlan and Huifeng plus Kangwo shouted that I was number one every day. A large number of outstanding young people who go out to work and pursue their dreams in life, under the cover of anti-static clothing, chant various quality control slogans, and install 300 1.5-kilowatt inverters every day on long benches that are described as assembly lines. Enjoying all kinds of glory in the tournament. However, the failure rate of domestic inverters at this time was extremely high, about 20%. What was the main reason? Because inverters were a very new thing in China at that time, and they were almost just a set of experimental products that were quickly used as As a tool for making money, there is no relevant industrial chain in China to support the purchase of high-quality and guaranteed materials. There is no quality control process at all. All we can do is shout slogans to strengthen workers' attention.