1. Product Introduction:
The PFE series elevator energy feedback device is a high-performance feedback braking unit specifically designed for elevators. It can effectively convert the regenerated electrical energy stored in the elevator inverter capacitor into AC power and send it back to the grid, turning the elevator into a green "power plant" to supply power to other equipment, and has the effect of saving electricity. In addition, by replacing resistors for energy consumption, the ambient temperature in the machine room is reduced, and the operating temperature of the elevator control system is improved, extending the service life of the elevator. The machine room does not require the use of cooling equipment such as air conditioning, indirectly saving electricity. Suitable for all configurations of frequency converters and energy consuming resistors in the elevator industry, it has been widely used in Mitsubishi, Tongli, Xunda, Vauxhall, Kuaiyi, Asia Pacific Tongli, Tongyou, Gangri, Fuji, Hitachi, Otis, Thyssen, Yongda, Ulivit, Sanrong, Deshengmi and other high-end brand elevators.
2. Product features:
⑴ Adopting military high-speed DSP central processing unit
High feedback efficiency, accurate control precision, good stability, few harmonics, strong anti-interference ability
⑵ Adopting SVPWM modulation technology
SVPWM modulation technology can achieve DC to AC conversion, perfectly restore three-phase output voltage, and output perfect current waveform through the superposition effect of filters and three-phase power grids
⑶ Adopting LC filtering technology
Effectively suppress harmonics and electromagnetic interference, with current and voltage THD<5%, ensuring feedback of clean electrical energy
⑷ Adopting phase sequence automatic recognition technology
The phase sequence of a three-phase power grid can be freely connected without the need for manual distinction of phase sequence
⑸ Built in fuse
Short circuit protection is in place to ensure safe operation of the elevator
⑹ Can automatically disconnect from faults to ensure the normal operation of the elevator
It is redundant with the original control system of the elevator and does not change the original control mode of the elevator,
⑺ Adopting multiple cutting-edge technologies, compatible with all brands of elevator frequency converters
Significant energy-saving effect, with a comprehensive energy-saving efficiency of 20-50%
The efficiency of regenerative energy recovery is as high as 97.5%
(10) Easy installation, debugging, and operation, convenient maintenance and upkeep
Adopting self diagnostic technology ensures accurate output voltage, prevents current backflow, and ensures that the frequency converter is not affected in any way.