Elevator energy-saving equipment suppliers remind you that the practical application of energy feedback energy-saving technology in elevator energy-saving mainly involves manufacturing and using energy feedback devices based on this feedback technology. The energy feedback device adopts a DSP central processing unit, which has high speed, high accuracy, good stability, low harmonics, and strong anti-interference ability; Adopting PWM pulse width modulation technology, the output phase is accurate, effectively suppressing high-order harmonics; Self diagnostic technology and bidirectional automatic voltage tracking ensure accurate output voltage, prevent current backflow, and ensure that the elevator is not affected in any way; Voltage distortion<5%, in compliance with the requirements of IEC6100-3-2 and GB/T14549 for power grid harmonics; By using grid self identification technology and utilizing reactors and filters, it can be directly connected to the 220V/380V grid for use, resulting in more significant energy savings in frequent braking situations.
If the variable frequency elevator can use an elevator power feedback device, it can smoothly convert the DC energy stored in the capacitor into AC energy and send it back to the grid, with a power saving rate of 25% -50%. Furthermore, due to the absence of resistance heating elements, the ambient temperature in the machine room has been reduced, and the operating temperature of the elevator control system has also been improved, preventing the control system from crashing and extending the service life of the elevator. The computer room can no longer use air conditioning and other cooling equipment, which can save the power consumption of the computer room air conditioning and cooling equipment, save energy and environmental protection, and make the elevator more energy-efficient.
The feedback device can ignore the resistance heat source because it does not use high consumption resistors. In addition, because there is no resistor, the temperature in the elevator machine room will not be too high, which greatly reduces the possibility of elevator failures, extends the service life of the elevator, and also effectively reduces the power consumption of the cooling equipment in the machine room. Through this approach, the energy-saving efficiency is greatly increased. Of course, the energy-saving effect will be more pronounced under high power, high-rise buildings, and frequent use.
The energy feedback device has a very prominent feature, which is the voltage adaptive control feedback function. In practical use, this function is very valuable because when the grid voltage fluctuates greatly, the elevator will still work as usual. In addition, only when the mechanical energy of the elevator is converted into electrical energy and sent to the DC circuit capacitor, the new electric energy feedback device can timely return the stored energy in the capacitor to the grid, effectively solving the shortcomings of the original energy feedback. It can minimize the harmonic interference of the frequency converter driving the elevator on the power grid and purify the power grid environment. The electric energy feedback device is significantly better than the high-energy consumption resistive braking unit device, improving the machine room environment, reducing the adverse effects of high temperature on control system components, and extending the service life of elevator equipment.