Lifting technology and cranes
Frequency inverters save energy with hoists
Power consumption and clean energy are also important in industrial lifting technology. Gefran's vector-controlled frequency inverters for hoists and cranes offer various functions that enable high energy savings.
The intelligent frequency inverters with field-oriented vector control ADV200 HC from Gefran are designed for motor outputs from 0.75 kilowatts to 1.65 megawatts and can be defined as a universal drive. They control asynchronous motors with or without speed sensors and control all lifting and adjusting movements - for example in hoists, gantries or overhead cranes. The inverters are characterized by high performance and sophisticated control functions. At the same time, they are easy to install and configure and offer a high level of user-friendliness as well as programming software in five languages.
Depending on the model, the voltage supply of the inverters is 380 Vac...690 Vac, 50 to 60 Hertz or 450...1120 volts DC. The overload is up to 180 percent. Key functions and features include self-calibration of the speed-current-flow controllers and detection of motor data when the motor is rotating and stationary, brake control, load swing damping, a joystick for safe remote operation, no overrunning of positions, "Moist Speed Up" and collision protection to prevent damage to the load.
The ADV200 HC also has the RS485 serial interface (Modbus RTU) and offers a connection to the common ProfiBus-DP, Canopen, DeviceNet and Real Time Ethernet fieldbuses, for example GDNet, EtherCAT, EtherNet/IP and ProfiNet.
In combination with the AFE200 active front-end unit, the power consumption of the respective application can be reduced. The infeed and regenerative unit uses the inertia forces of the loads to save energy and thus enables the lifting systems to be optimized. They are designed for a power range from 22 kilowatts to 1.65 megawatts for a three-phase supply of 400 to 690 volts and can feed the DC bus of the frequency inverters. This means that clean energy can be fed back with a cosφ of 1 and extremely low distortion (THDi ≤ 3%). The SMB200 and FFE200 feed-in and feed-back units can also contribute to significantly more economical operation of a system if suitably designed. as
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