Elevator energy-saving equipment suppliers remind you that the elevator energy-saving feedback device is an effective way to 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 function 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.
1、 Why do elevators generate electricity?
Elevators rely on the rotation of traction machines to move up and down. A traction machine is an electric motor, which is usually considered to consume electricity. However, it can also operate in a generating state and actually become a generator. About half of the time, the elevator is in the process of heavy objects moving downwards. At this time, gravitational potential energy is converted into kinetic energy and converted into electrical energy through the traction machine. At this time, the traction machine of the elevator is in a state of generating electricity, especially during the deceleration and braking process, the amount of electricity generated will be even greater.
2、 Is the electricity generated by the elevator utilized? How was it handled?
Due to the fact that the traction machine is connected through a frequency converter, the electricity generated by the traction machine is directly converted into direct current and cannot be directly utilized. For this electrical energy, it is usually consumed by a heating resistor, resulting in a large amount of heat. These electricity can be recycled and reused through energy-saving feedback devices to save energy and reduce consumption.
3、 What are the benefits of installing energy-saving feedback devices?
The energy-saving feedback device can recycle the generated electricity for utilization, achieving a 20% to 50% energy-saving rate, which varies with the height of the floor and the frequency of use. Due to the fact that the electricity has been recovered and is no longer used for heating, the heat in the computer room can be greatly reduced, which can reduce the usage of air conditioning in the computer room. Generally, the usage of air conditioning can be reduced by 50% to 80%, which can bring significant energy savings to the air conditioning; Reducing heat can also improve the environment of the computer room.
4、 How can energy-saving feedback devices achieve power generation recovery?
The energy-saving feedback device is similar to a miniature power station. After processing the electrical energy, it becomes a current of the same frequency and phase as the power grid, which is supplied to the local power grid and can be used by other elevators and electrical equipment. It can reduce the amount of electricity that buildings obtain from the power company, thereby reducing electricity bills. This is a miniature "grid connected" device, similar to the "grid connected power generation" of the power sector. Beijing Times Science and Technology Co., Ltd. has obtained another power supply through an energy-saving feedback device, which can reduce the amount of electricity demanded from the grid.
5、 What is the impact of energy-saving feedback devices on elevator operation safety?
Any electrical device will generate electromagnetic noise. The energy-saving feedback device of the elevator and the elevator itself generate electromagnetic noise during operation.
In energy-saving feedback devices, it is necessary to convert DC electrical energy into AC power that is completely at the same frequency and phase as the power grid. A large amount of electromagnetic noise (interference) will be generated during the transformation process.
These interferences will affect the operation of the elevator. So any electrical equipment connected to elevator equipment must, in principle, meet the "electromagnetic compatibility standards".
Energy saving feedback device when meeting electromagnetic compatibility standards; The interference with the elevator should be controlled within the allowable range.