? I. Elevator Energy - Saving Technology: Energy - Storage Power - Saving and Emergency Leveling System
Energy - Storage Elevator Power Saver
Technical Principle: A high - power bidirectional DCDC converter is used to detect the DC bus voltage of the elevator frequency converter in real - time. The excess electric energy generated when the elevator is in the power generation state (light load upward, heavy load downward or braking) is recovered into the supercapacitor energy storage module. It is then released and reused when the elevator consumes energy, replacing the energy waste of the traditional braking resistor.
Energy - Saving Effect:
The comprehensive power saving rate ranges from 30% to 46.2% (up to 46.1% when no - load and 42.1% when fully loaded);
At the same time, it reduces the temperature of the control cabinet and the energy consumption of the machine room air conditioner (saving about 5,000 yuan per unit per year).
Integration of Emergency Leveling Function
In the LP060 emergency - type power saver, the energy storage module can start within 3 seconds when the mains power fails, providing emergency power for the elevator to realize automatic leveling and door opening to release passengers, avoiding passengers being trapped.
The patented technology (CN110054045A) ensures that the elevator decelerates smoothly when the power is off, and the lighting/ventilation is uninterrupted, improving safety and comfort.
?? II. Core Patents and Technological Innovation
High - power Bidirectional DCDC Converter
As the core component of the elevator energy saver, it realizes the efficient two - way flow of energy between the DC bus and the energy storage module, with a response speed of milliseconds, supporting the rapid charging and discharging of supercapacitors.
Combined with full - digital PWM control technology, the electric energy conversion efficiency exceeds 95% without harmonic pollution.
Filtering and Reactive Power Compensation Devices
Active Power Filter (W - APF): Co - developed with Tsinghua University, it can simultaneously filter harmonics (40μS response), dynamically compensate reactive power, balance three - phase loads, and increase the power factor to more than 0.95.
Contactless Reactive Power Compensation Device: Adopting thyristor switched capacitor technology, it has no inrush current and no overvoltage, and is suitable for power grids/industrial equipment with a compensation capacity of 22.5 - 300kvar.
???? III. Energy - Saving Effect and Economic Benefits
???? IV. Product Series and Application Scenarios
Elevator Power Saver Series
LM040 Basic Type: For small elevators with less than 10 floors, mainly for energy saving;
LM060 Heavy - duty Type: For large elevators with more than 10 floors, supporting high loads;
LP060 Emergency Type: Integrating emergency leveling function to ensure safety.
Application Case: Shanghai Jiao Tong University School of Medicine project, with a comprehensive power saving rate of 35%, certified by the National Elevator Testing Center.
Extended Power Quality Products
Voltage Stabilizer: ZSBW/ZDBW intelligent contactless voltage stabilizer, anti - interference, maintenance - free, suitable for precision equipment (such as CNC machine tools, medical instruments);
High - frequency Isolated DC Power Supply: Used as a backup power supply for power systems, supporting automatic switching of constant voltage/constant current/constant power;
Port/Microgrid System: Although the technical parameters are not detailed, the company clearly mentions that its products cover the field of port machinery energy saving and new energy microgrids.
???? V. Enterprise R & D Strength and Background
Technical Cooperation: Jointly established a FACTS technology transformation base with Shanghai Jiao Tong University, and developed filters with Tsinghua University;
Customer Coverage: Global enterprises such as Huawei, Siemens, Mitsubishi, as well as major projects such as Oriental Pearl and rail transit;
Positioning: Focusing on "comprehensive power quality solutions", covering four main lines: voltage stabilization, harmonic treatment, reactive power compensation, and energy - saving equipment.
???? VI. Summary: Core Products and Technical Advantages
The following table summarizes the main products and their technical highlights of Shanghai Wenlida in the field of elevator energy saving and power electronics:
Wenlida's core competitiveness lies in the integration of energy recovery (DCDC conversion), safety emergency (supercapacitor) and power grid purification (filtering compensation) technologies, providing an integrated "energy saving - safety - stability" solution for high - energy - consuming scenarios such as elevators, which is in line with the national green development strategy. Its product customization capability (such as special interfaces/IP protection levels) further expands the industrial adaptation boundary.
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