PFU elevator emergency feedback device

The PFU elevator feedback emergency device is a low-noise energy feedback and three-phase emergency power supply product manufactured with Canadian technology. It uses advanced algorithms to achieve complete sine wave energy feedback and sine wave three-phase emergency power output functions. It can not only convert the regenerative DC power in normal operation of the elevator into AC power synchronized with the grid and feed it back to the grid to achieve the purpose of energy saving, but also provide three-phase emergency power output to the elevator after the grid is out of power to achieve emergency leveling of the elevator. The role of. The PFU elevator feedback emergency device organically combines the elevator energy feedback function and the elevator emergency power supply function into a system, which can not only realize the elevator energy feedback function, but also provide the three-phase elevator emergency power supply to realize the elevator emergency leveling function . The two functions are combined in one control system, which greatly improves the stability and reliability of the system.

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(1) It has all the functions of elevator emergency power supply;

(2) The recovery efficiency of regenerative electric energy is as high as 97.5%, the energy-saving effect is remarkable, and the comprehensive power-saving efficiency reaches 20-50%;

(3) Built-in reactor and noise filter can be directly connected to the grid without causing interference to the grid and surrounding electrical equipment;

(4) Special battery management, so that the battery life can reach more than three times that of peers (other elevator emergency power equipment);

(5) Adopt a variety of original technologies, compatible with all brands of elevator inverters;

(6) When the power supply of the power grid is interrupted, the PFU ensures that the elevator stops nearby or returns to the first floor and opens the door. When the power supply of the power grid is normal, it is an energy regeneration feedback device, and the economic benefits generated during the life of the equipment far exceed the equipment’s cost of investment;

(7) Electromagnetic isolation technology is used to isolate the battery from the three-phase electricity to ensure the safety of the battery and the inverter;

(8) Adopt high-speed DSP central processing unit: upgrade a new generation of feedback control software, accurate control accuracy, good stability, less harmonics, and strong anti-interference ability;

(9) Adopt the latest SVPWM modulation technology in the industry: upgrade a new generation of SVPWM vector control technology to meet all the requirements of the elevator energy feedback national standard for current harmonics;

(10) Meet the national standards of elevator energy feedback device: upgrade the new generation of control software and hardware, and pass the test of GB/T 32271-2015 "Elevator Energy Feedback Device" and TSG T7007-2016 "Elevator Type Test Rules", report number: WT NET 19-155;

(11) Standard RS485 communication and feedback power display: the product comes standard with RS485 communication and keyboard communication display, and all software control parameters are open for display and debugging, which is convenient for product monitoring;

(12) Prevention of islanding effect: the software monitors the status of the power grid in real time, and the power outage of the power grid will immediately stop the power feedback to the grid to prevent the islanding effect;

(13) Using LC filter technology: Optimize LC filter, effectively suppress harmonics and electromagnetic interference, voltage and current THD<5%, to ensure clean energy feedback;

(14) Adopt the automatic phase sequence identification technology: upgrade the automatic phase sequence identification technology, the phase sequence of the three-phase power grid can be connected at will, without the need to distinguish the phase sequence artificially;

(15) The upgraded hardware design exceeds the national standard requirements for withstand voltage: the newly upgraded hardware design meets the withstand voltage of 2500 volts AC for 1 min, and the leakage current is less than 2 mA, which is far lower than the national standard 30 mA requirement;

(16) The hardware design is highly integrated to improve product reliability: all hardware design circuits adopt PCB integrated circuit design to improve product consistency and reliability;

(17) Standard air circuit breaker and fuse: standard DC and three-phase AC fuses, standard air circuit breaker, short circuit protection in place, to ensure the safe operation of the elevator;

(18) It can automatically escape from the fault to ensure the normal operation of the elevator: it is mutually redundant with the original control system of the elevator, and does not change the original control method of the elevator;

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