Introduction：
Construction elevator is an indispensable vertical transportation equipment in the construction of modern high-rise buildings. In particular, it plays an extremely important role in the construction of high-rise and super high-rise buildings, and plays an irreplaceable role in ensuring the construction period and safety, reducing construction costs and reducing labor intensity. D32 inverter has good performance and energy saving effect in the use of building construction elevators.
Features：
D32 is a wall-mounted inverter, the power range is 0.75KW-500KW, the voltage level of the incoming line voltage is 380V-480V, and the control method is vector control without speed sensor. D32 has a wealth of substations, including 8 digital inputs (LI1-LI8), 2 analog inputs (AI), 2 relay outputs (TA), 2 analog outputs (AO), 5V auxiliary power supply for analog power supply Fixed input, 24V auxiliary power supply is used for digital input, all LI/TA, AI/AO can be freely programmed to define functions.
MODBUS interface is standard configuration of D32, no option is required. The D32 can be connected to higher-level automation systems via MODBUS.
Advantage：
It has excellent low frequency torque characteristics and can provide 0.5Hz 150% rated torque;
Reliable brake control, safe and reliable;
Multi-stage speed adjustment to realize the function of fast light load speed and slow heavy load speed;
Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
It has strong environmental adaptability, and the completely independent air duct design can greatly improve the resistance to harsh environments such as oil pollution, dust and damp heat.
System Introduction：
In this system, the main circuit part of the motor is driven by the D32 37KW inverter. The whole system is controlled by the D32 frequency converter, and the running speed uses two speeds to realize the function of fast light load speed and slow heavy load speed. Output a group of relay brake signals to control the opening and closing of the motor's brake.
Technical Parameter
| Inverter technical parameters | Device configuration | |
 Model: D32 | Output current: 75A | One D32 inverter |
| Input voltage: 3-phase, 380-480V | Frequency range: 0-400Hz | 11kW motor and load |
| Input frequency: 50/60Hz ±5% | Overload capacity: 150%, 60 seconds | Brake unit |
| Output power: 37KW | Ambient temperature: -10-40°C | Braking resistor |
| Output voltage: 0-480V (the maximum value is determined by the input voltage) | Protection level: IP20 | |
On Site Usage：
According to the on-site space situation, a D32 series inverter is installed in the control cabinet, and the inverter installation and on-site motor are as shown in the figure
Running Result：
The elevator control system using D32 inverter has been put into operation for more than three years, and has achieved good economic and social benefits
The control device operates reliably, has good environmental adaptability, can resist harsh environments such as oil pollution, dust and damp heat, and has a low failure rate;
*Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
*There is no "slip hook" phenomenon when the lifting weight is different when the load starts and stops;
*Light load speed-up and loose rope detection functions meet customer requirements for improving production efficiency and safety.
Customer Benefits：
Precise speed control improves production efficiency;
Reduce the wear and tear of equipment gears and reduce maintenance costs;
Safe and reliable performance to ensure the safety of production activities;