How big is the gap between domestic inverters and ABB inverters?

At present, there are many domestic manufacturers of inverters, and there are several domestic inverters that do well (for low-end and mid-range industry applications), so how far is it from high-end inverters of international brands?

Are international brands better than domestic ones?

                                                                                       A: Software

1. Software, control algorithm ... Whether it is DTC or vector control, it is no longer a secret. Even TI ’s chip information is readily available. Find an intern to compile a motor control software. In fact, even the code is No need to write ... it will let the motor spin up.

2. So software and algorithms are mature? Nor, you worked in Siemens after graduating from a Ph.D. Can you imagine having a Ph.D. with a salary of more than 100,000 yuan only be responsible for the decoding software for a position sensor? And it takes half a year to do it ... Of course, the required position accuracy ... Of course, it is also unimaginable ...

This cost cannot be borne by a domestic company ... nor can any domestic company do it quietly.

It can be said that the overall software architecture is the same whether it is Siemens or Huichuan, the difference is a little detail.

                                                                                       B: Hardware

1. In fact, it is still a question of mentality. A LEM sensor with 400% error is 400 pieces, and a domestic sensor with 1% error is 40 pieces. Which one do you buy?

2. Copper wire or aluminum wire? Is the core material good or bad? Is it a problem?

3. As for the IGBT, the chip is basically the same, what is used in the ABB Siemens inverter, and what is basically used in the domestic, or that sentence, the overall structure is the same, the difference is the details.

                                                                                     C: How big is the gap?

1. It can be said that there is basically no difference. The inverter is not a high-tech thing. I have worked in foreign companies and private companies, and the personnel are also interflow. How big can you say the gap?

2. The problem lies in the impetuous mentality. Let's take a simple number. Assuming the same model design, ABB will take more than 2 years from the proposal to mass production. Siemens will take nearly 4 years. In China, it will take about half a year ...

3. Research and development costs, assuming ABB 15 million, Siemens will have 20 million, domestic companies go to dig out individuals, counter copying, 2 million.

4. The days of foreign companies are not necessarily better than those of domestic small companies ... ABB and Siemens are also coping with the challenges of low-cost domestic models every day.

5. However, it is worth noting that more and more domestic enterprises are investing in formal R & D ... But the current main players in the northern market are still Noluzi, and the hope of the manufacturing industry is in Shenzhen ...

The overall gap is relatively large:

The vector algorithm was proposed by Siemens, and the DTC was proposed by ABB. The two rely on the algorithm to achieve the first and second respectively. If the vector or DTC algorithm is still used in China, then the R & D expenditure and time invested cannot be compared How can we make up the gap between the two?

Maybe everyone thinks that the control principle is known, but for example, the principle of the gearbox is well known in the world, why domestic heavy-duty and automobile gearboxes are always bad? If you look at the principles of aeroengines, India has invested tens of billions of dollars, and even a prototype cannot be made! Unless one day we discover a new control theory or main device, redefine the inverter, and overtake in a corner! Otherwise, we can only rely on our overtime and industrious proximity. It is said that Apple killed Nokia, but Nokia is still the number one mobile phone, but Apple has redefined the mobile phone. The Nokia era mobile phone is used to call and send text messages. The proportion of Apple era mobile phones to call and send text messages is even Can be ignored.

                                                                   The gap in the segmented user market is not large:

The market segment gap here does not refer to users. For example, if the user only controls a single fan, anyone can do any function and performance, and more is a waste. The higher part is not used at all, and the domestic brands are more friendly in interface and operation. Just like you don't choose vernier calipers when measuring the runway, it fits best.