(1) Adopting military grade high-speed DSP central processing unit
High feedback efficiency, accurate control precision, good stability, few harmonics, strong anti-interference ability
(2) 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
(3) Adopting LC filtering technology
Effectively suppress harmonics and electromagnetic interference, with current and voltage THD<5%, ensuring feedback of clean electrical energy
(5) 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
(5) Built in fuse
Short circuit protection is in place to ensure safe operation of the elevator
(6) 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,
(7) Adopting multiple cutting-edge technologies, compatible with all brands of elevator frequency converters
(8) Significant energy-saving effect, with a comprehensive energy-saving efficiency of 20-50%
(9) The efficiency of regenerative energy recovery is as high as 97.5%
(10) Easy installation, debugging, and operation, convenient maintenance and upkeep
(11) PFK elevator star centralized feedback energy-saving device, which concentrates the regenerative kinetic energy and mechanical energy of 1 to 6 elevators and feeds them back to the power grid, achieving the green energy-saving goal of elevators
(12) PFK elevator star centralized feedback energy-saving device has higher safety, with electromagnetic isolation between each elevator and electrical isolation between the elevator and feedback
(13) PFK Elevator Star uses each elevator room as a unit for centralized control and unified feedback, resulting in higher efficiency
(14) PFK Elevator Star does not have any restrictions on the way it feeds back to the power grid, and can freely feed back to third-party power grids, making the system more reliable
(15) PFK Elevator Star ensures that there is no mutual influence between different elevators, and each elevator has its own independence, making operation more stable
Technical Specifications Table
| Category | Item | Specifications |
| Power Supply | Grid Voltage | Three-phase 200~240Vac |
| Three-phase 340~460Vac | ||
| Grid Frequency | 45Hz~65Hz | |
| Control | Current Control Mode | Vector Control, THD < 5% @ 100% Load |
| Output Control Mode | DC Bus Voltage Predictive Control | |
| Feedback Start Voltage | 357Vdc (220V class) ± 120Vdc adjustable | |
| 617Vdc (380V class) ± 120Vdc adjustable | ||
| Fan Control | ON at 43°C, OFF at 40°C | |
| Overheat Protection | 85°C (IGBT internal temperature) | |
| Display | Status Indication | Power indicator, Fault indicator, Feedback status indicator, etc. |
| Installation Environment | Installation Site | Indoor, altitude ≤ 1000m (derate by 10% for every 1000m increase), no direct sunlight, no conductive dust or corrosive gases. |
| Ambient Temperature | -10~40°C, well-ventilated | |
| Ambient Humidity | Below 90% RH (non-condensing) | |
| Vibration | Below 0.5g | |
| Air Environment | Free of dust, direct sunlight, corrosive/flammable gases, oil mist, steam, water bodies, etc. No excessive salt content. | |
| Storage Environment | Ambient Temperature | -40~70°C |
| Ambient Humidity | 5~95% RH | |
| Air Environment | Free of dust, direct sunlight, corrosive/flammable gases, oil mist, steam, water bodies, etc. No excessive salt content. |
Electrical Specifications
| PFK Model | Number of Elevators | Applicable Grid Voltage Range | Feedback Current (Three-phase Output Current) | |
| Continuous Rated | Peak | |||
| PFK-04-2-45NDC | 2 Units | 340VAC ~ 460VAC | 22A | 33A |
| PFK-04-3-45NDC | 3 Units | 24A | 36A | |
| PFK-04-4-45NDC | 4 Units | 26A | 39A | |
| PFK-04-5-45NDC | 5 Units | 28A | 42A | |
| PFK-04-6-45NDC | 6 Units | 30A | 45A |
Table 2: Physical Dimensions
| PFK Model | Enclosure Space Dimensions (L*W*H, Unit: mm) | Height Code |
| PFK-04-2-45NDC | 300 * 340 * 650 | B |
| PFK-04-3-45NDC | 300 * 340 * 850 | C |
| PFK-04-4-45NDC | 300 * 340 * 850 | C |
| PFK-04-5-45NDC | 300 * 340 * 1050 | D |
| PFK-04-6-45NDC | 300 * 340 * 1050 | D |
