What are the defects of frequency conversion speed regulation of mining trolley locomotive?
There are three speed regulation methods for mining trolley locomotives, resistance speed regulation, chopper speed regulation and frequency conversion speed regulation. There are many introductions about resistance speed regulation and chopper speed regulation. This article introduces frequency conversion speed regulation. There are many advantages of frequency conversion speed regulation, such as energy saving, stepless speed regulation, good speed regulation performance, simple control and so on. So what's wrong with it?
The main reason is that its cost will be higher than that of resistance speed regulation and chopper speed regulation. This not only refers to its price, but also its subsequent maintenance costs are relatively high. In most cases, the resistance speed regulation is caused by damage to the resistance or the metal contact, while the chopper speed regulation and frequency conversion speed regulation need to test which part of the circuit has the problem. Among them, the chopper speed regulation also has the IGBT module that is relatively prone to problems, and the frequency conversion speed regulation is difficult to find the problem place based on experience. To find out the problem quickly and accurately, maintenance personnel must not only have a certain level of mechanical and electrical maintenance, but also be able to understand the corresponding drawings. If the ability of the maintenance personnel is insufficient, then contact the manufacturer. Even if the maintenance personnel are capable enough or the manufacturer's remote guidance is in place, the repair may take a certain amount of time. Because boards such as IGBT modules or other electronic components are not only relatively expensive, but also require storage, so mines generally do not have inventory.
The above is the main defect of frequency conversion speed regulation of mining trolley electric locomotive.
