Elevator energy-saving equipment suppliers remind you: with the development of urbanization, the demand for elevators is growing, in the electricity consumption survey statistics for hotels, office buildings, etc., elevator electricity consumption accounts for more than 17% ~ 25% of the total electricity consumption, second only to air conditioning electricity consumption, higher than lighting, water supply, etc.
At present, the elevator has been divided into "energy-consuming" and advanced "feedback type" two kinds, customers in the new purchase of the elevator, the proportion of the choice of "feedback type" elevator is more and more. The energy-saving effect is related to the elevator power, the entire system of the elevator, the balance system of the elevator, etc., the following types of situations are better energy-saving effect:
(1) The higher the floor of the elevator, the more frequent the braking, the more energy saving;
(2) the newer the elevator installed, the greater the mechanical inertia, the more energy saving;
(3) The faster the elevator, the more frequent the braking, the more energy saving;
(4) The more frequent the use of the elevator, the more frequent the braking, the more energy saving.
Adopting advanced power electronics technology, reliable and safe quality, intelligent operation, simple to no need for customers to do any operation. There is a perfect after-sales warranty service, to solve all customer concerns.
Product Principle Overview
As the scale of modern production continues to expand and people's living standards continue to improve, the contradictions in power supply and demand are becoming more prominent, and the call for energy saving is increasing. Relevant statistics show that the electric motor drag load consumes more than 70% of the total power consumption. Therefore, the motor drag system has a particularly important social significance and economic benefits.
There are two main types of ways to save electricity in the motor traction system:
(1) improve the operating efficiency of the motor traction system, such as the fan, water pump speed adjustment is an energy-saving measure aimed at improving the load operating efficiency, and then the elevator tractor adopts frequency converter speed adjustment to replace the asynchronous motor pressure adjustment speed is an energy-saving measure aimed at improving the operating efficiency of the motor;
(2) The mechanical energy (bit energy, kinetic energy) on the load in motion is converted into electricity (renewable electricity) through the energy feeder and returned to the AC grid for use by other electrical equipment nearby, so that the motor drag system consumes electricity from the grid in the unit time, thus achieving the purpose of saving electricity.
Elevator for example to introduce the second type of energy saving principle
In addition, the lift is also a bit capacity load, in order to evenly drag the load, the load dragged by the tractor is composed of the passenger compartment and the counterweight balance block, only when the passenger compartment weight is about 50% (1 ton passenger lift passengers are about 7 people), the compartment and the counterweight balance block are balanced, otherwise, the compartment and the counterweight balance block will have poor quality, so that the mechanical bit capacity is generated when the elevator is running.
The excess mechanical energy in the operation of the elevator (containing bit energy, kinetic energy) is converted into DC electricity stored in the capacitor in the DC circuit of the frequency converter, at this time the capacitor is like a small reservoir, the more electricity returned to the capacitor, the higher the capacitor voltage, (such as the water level of the reservoir is ultra-high), if the capacitor is not released in time to store the electricity, it will produce an overvoltage failure, so that the frequency converter stops working, the elevator can not run properly.
At present, the vast majority of the domestic variable frequency adjustment elevators use the method of resistor consumption stored in the capacitor to prevent the capacitor overvoltage, but the resistor energy consumption not only reduces the efficiency of the system, the large amount of heat generated by the resistor also worsens the environment around the elevator control cabinet.
The role of the energy feeder is to efficiently return the stored electricity in the capacitor to the AC grid for use by other electrical equipment. The energy saving effect is very obvious, and the general energy saving rate can reach 21% ~ 46%. In addition, due to the non-resistive heating element, the machine room temperature drops, it can save the power consumption of the machine room air conditioning, in many cases, saving air conditioning power consumption tends to bring greater energy saving effect.
One of the main features of the new type of energy feeder compared to other energy feeders at home and abroad is the voltage adaptive control feedback function.
General energy feeders are based on the size of the inverter DC circuit voltage UPN to decide whether to feed back electricity, the feed back voltage adopts a fixed value UHK. Due to fluctuations in the grid voltage, when the UHK value is small, it will generate false feedback when the grid voltage is high; When the UHK value is large, the feedback effect decreases significantly (the energy stored in the capacitor is consumed by the resistance in advance).
The new type of energy feeder adopts voltage adaptive control, that is, regardless of how the grid voltage fluctuates, only when the mechanical energy of the elevator is converted into electricity into the DC circuit capacitor, the new type of energy feeder will timely return the storage energy in the capacitor to the grid, effectively solving the defects of the original energy feedback.
In addition, the new type of energy feeder has a very perfect protection function and extension function, which can be used both for the transformation of existing elevators and for the support of new elevator control cabinets. The new elevator control cabinet uses a new type of energy feeder to power, not only can greatly save electricity, but also can effectively improve the quality of input current, to achieve higher potential compatibility standards.
The new type of energy feeder is suitable for a wide range of voltage classes, 220VAC, 380VAC, 480VAC, 660VAC, etc.
Product Life
According to the detection, the energy feeder can run reliably for more than 70,000 hours. That is, the elevator runs 24 hours a day, 365 days a year, and the energy feeder can be used continuously for more than 8 to 10 years. Because the elevator has a waiting or standby state, it is not like a bulb, it is in a long-term working state.