The Importance of Uninterruptible Power Supply for Electric Drives
For the uninterrupted operation of electric drives, stable power supply is necessary. However, sometimes the power grid cannot provide adequate support, leading to failures and interruptions in the operation of the device. This negatively affects the efficiency of electric drives, especially in critical areas such as lifting and transportation mechanisms in industrial production. Ensuring a continuous power supply and increasing the reliability of mechanisms is a pressing task of today.
Development of Uninterruptible Power Supply Systems
To solve the problem of uninterrupted power supply for electric drives, active developments are being conducted. One of such systems is the frequency converter (FC), which consists of a rectifier, voltage inverter, and a direct current link. This scheme has already gained wide recognition in the industry and is in high demand among consumers.
Use of UPS for Powering Electric Drives
Currently, to ensure continuous power supply for mechanisms, consumers often resort to using ordinary uninterruptible power supplies (UPS) with built-in batteries. Such devices operate on a scheme where the inverter and rectifier are connected in series, with a battery that provides conversion from alternating to direct current and vice versa. In case of fluctuations in the power grid, the battery starts to power the system while the inverter continues to draw electricity from the grid. However, this approach has significant disadvantages: double conversion of voltage leads to a decrease in the efficiency of the electric drive, which, in turn, increases costs.
Advantages of the FC-DCP System
A more effective alternative is the FC-DCP system. It is represented by the Uninterruptible Power Supply Unit (UPSU) — a block of continuous power management. The main advantage of such a block is the continuous connection of the direct current components with the voltage inverter and the battery, which helps to avoid interruptions in the operation of the electric drive.
This system allows charging the battery during braking, where the battery functions as a generator. It is worth noting that almost half of the working time of mechanisms with electric drives occurs in braking mode. When the battery discharges, the system automatically switches to grid power through the rectifier. This advantage significantly reduces electricity costs without stopping the mechanisms.
Conclusion
The Uninterruptible Power Supply Unit is the optimal choice for those who require uninterrupted operation of equipment with minimal costs and losses. The system provides stable power supply and enhances the efficiency of electric drives in various applications.