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Characteristics of Din Rail Power Supply and Selection of Motor Power Supply Method

The DIN Rail Power Supply is a switching power supply that converts an unstable input voltage into a regulated output voltage. Compared to linearly regulated power supplies (transformers), switching power supplies are characterized by significantly higher conversion efficiency, lower weight and more compact design. lightweight and more compact design than linearly regulated power supplies (transformers).

The special feature of DIN-rail power supplies is the type of mounting, which gives them their name. The power supply is connected to a standardized DIN rail, also known as a top hat. rails, also known as top hat rails.

The rails are mounting rails made of metal with fixed standardized dimensions. These dimensions were originally defined by the German Institute for Standardization (DIN). This type of mounting has spread worldwide and has been adopted as a European (EN) and International (IEC) standard. It is suitable for most industrial applications worldwide. It has become a fixed component of electrical cabinets, distribution boxes and machines. The choice of available electrical components (power supplies, circuit breakers, relays, industrial PCs, etc.) for this type of mounting is virtually unlimited.

Cross-section of 15mm rail
Cross-section of 7.5mm rail

There are 2 ways for the power supply to power the drives:

Option 1: One power supply with multiple drives

Cost and space saving: using one power supply can reduce the acquisition cost of the equipment and the occupied space, which is in the space and budget limited application is very favorable.
Simplify wiring: only one power supply can drive multiple drives, which can simplify the arrangement and management of power lines.
Convenient maintenance: If there is a problem with a power supply, only one power supply needs to be maintained and replaced instead of checking multiple power supplies. sources.
Power load: a power supply needs to provide enough current and voltage to drive all the stepper motor drivers. If the rated output of the power supply is not rated to deliver enough output to support all the drivers, the power supply may be overloaded or the voltage may drop, affecting driver and motor performance.
Interference Problems: Sharing a power supply with all the drives can lead to power supply noise and interference problems. If one drive If the power noise generated by one drive is captured by the other drives, it may affect their performance.
Impact of Failure: If a power supply fails, all drives connected to that power supply may be affected, which can cause the entire system to shut down.

Option 2: One power supply with one drive

Independent power supply: Each drive has an independent power supply and is not affected by other drives. This improves the stability and reliability of the system. Stability and reliability of the system.
Separation of power supply and load: Each drive has its own power supply, which can avoid overloading the power supply and reduce the interference of power fluctuation on other devices. devices.
Increased cost: Each drive requires a separate power supply, which may increase the cost of the system.
Space consumption: Each drive requires an additional power supply unit, which may require more space to install these devices.
Failure impact: If the power supply of one drive fails, it may affect the normal operation of other drives.

Updated on: 21/08/2023

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