PFE elevator feedback energy saving device

PFU elevator feedback emergency device is a low-noise energy feedback and three-phase emergency power supply product. It adopts advanced algorithm to realize complete sine wave energy feedback and sine wave three-phase emergency power output function. It can not only convert the regenerative DC power in the normal operation of the elevator into the AC power synchronized with the power grid and feed it back to the power grid to achieve the purpose of energy saving, but also provide the elevator with three-phase emergency power output after the power grid is cut off, so as to realize the emergency leveling of the elevator. effect.

PFU elevator feedback emergency device is an organic combination of elevator energy feedback function and elevator emergency power supply function into a system, which can not only realize the function of elevator energy feedback, but also provide three-phase elevator emergency power supply to realize the function of elevator emergency leveling. . The two functions are combined in one control system, which greatly improves the stability and reliability of the system

(1) It has all the functions of the 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 electricity saving efficiency reaches 20-50%;

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

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

(5) Using 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 leveling and opens the door. When the power supply of the power grid is normal, the PFU is an energy regeneration feedback device, and the economic benefits generated in the life cycle far exceed the equipment's capacity. 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, with 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 current harmonic requirements of the elevator energy feedback national standard;

(10) Meet the national standard of elevator energy feedback device

Upgraded a new generation of control software and hardware, passed GB/T 32271-2015 "Elevator Energy Feedback Device" and TSG T7007-2016 "Elevator Type Test Rules" test, report number: WT NET 19-155;

(11) Standard RS485 communication and feedback energy 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.

control;

(12) Prevent islanding effect

The software monitors the status of the power grid in real time, and the power failure of the power grid will immediately stop the power feedback to the power grid to prevent the islanding effect;

(13) Adopt LC filter technology

Optimized LC filter to effectively suppress harmonics and electromagnetic interference, voltage and current THD <5%, to ensure the feedback of clean electric energy;

(14) Adopt phase sequence automatic identification technology

Upgrade the phase sequence automatic identification technology, the phase sequence of the three-phase power grid can be connected at will, and there is no need to manually distinguish the phase sequence;

(15) The upgraded hardware design exceeds the requirements of the national standard for pressure resistance

The newly upgraded hardware design meets the 1min withstand voltage of 2500V AC, and the leakage current is less than 2mA, which is far lower than the national standard 30mA requirement;

(16) Highly integrated hardware design to improve product reliability

The hardware design circuit adopts PCB integrated circuit design to improve the consistency and reliability of the product;

(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;