Inverter selection point - Delta

Create Date: 2024-8-30 12:03:23|Source: Delta/Delta

1. When selecting the inverter, select the inverter with the appropriate control method according to the load characteristics

In addition to the inverter manufacturing process, it is also important to use the inverter's control method. The control methods of the inverter are mainly divided into two types: open-loop control and closed-loop control. In the meantime, the open-loop control method has simple structure and stable function, but the speed regulation accuracy and dynamic response function are low; The closed-loop control method can be controlled in real time according to the changes of flow, temperature, orientation, speed, pressure and other parameters, and the dynamic response is fast, but it is difficult to implement in some cases, and the cost is high. The user should choose the corresponding control method according to their own needs, and then obtain the required speed regulation characteristics.

Inverter selection point - Delta

2. When selecting the inverter, the protective structure of the inverter should be selected according to the device environment

When selecting the inverter, the installation environment should be considered, which includes the ambient temperature, humidity, dust content, corrosive gas and other factors, which is very related to whether the inverter can operate for a long time. If the operating conditions cannot be met, corresponding protective measures need to be adopted.

Most inverter manufacturers will provide the following common protection structures for users to choose.

(1) Open IP00, which maintains the live part inside the inverter from the front maintenance of the human body, and is suitable for the screen, plate and shelf of the device in the electric control cabinet or electrical room, especially the gathering and use of multiple inverters is better, but it has higher requirements for the device environment.

(2) Enclosed IP20, IP21, the inverter of this protective structure has an outer cover all around, which can be wall-mounted on the wall in the building, and can have a small amount of dust or a small amount of temperature and humidity, and it is suitable for most indoor device environments.

(3) Sealed IP40, IP42, it is suitable for the occasion with poor environmental conditions in the industrial site.

(4) Closed IP54 and IP55, which has dustproof and waterproof protective structure, and is suitable for the occasion of poor environmental conditions on industrial sites, water showers, dust and corrosive gases.

When selecting the inverter on the engineering site, it should be selected according to its own actual process requirements and application occasions, and the pros and cons should be weighed, reasonably selected, and comprehensively considered. As long as the inverter is used correctly and sensitively, the communication frequency conversion speed regulation [system] can operate better.

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