AC70T Hoist Special Drive
- Automatic speed increment when light load or empty hook, matching optimal operating speed
- Zero-speed torque retention prevents the brake from slipping due to long mechanical delays
- Synchronous control function ensures that two hoisting mechanisms are synchronized to ensure safety
- Anti-collision function to prevent collision
AC70T Hoist Special Drive Overview
AC70T hoisting special frequency drive is specially designed for the application of the industry. It has perfect functions, good protection effect (resistance to salt spray corrosion), and excellent performance, ensuring the safety, reliability and efficiency of hoisting machinery. It is suitable for the drive of lifting, pitching, trolley, slewing, luffing, etc. in industries such as port machinery, ship machinery, construction machinery, mining machinery, cranes, gantry cranes, electric hoists, cranes and hoists.
Functions
1. Light load and high speed.
2. Zero-speed torque maintenance.
3. Synchronous control of multiple motors.
4. Anti-collision function.
Features
Stable operation at low frequency and large torque
0.5Hz/150% rated torque output smoothly, to ensure that the lifting equipment runs smoothly during starting, rising and falling.
Excellent current suppression and bus voltage suppression
The current suppression function can avoid frequent over-current alarms of the AC drive. When the current exceeds the current protection point, the overcurrent suppression function can continuously limit the current within the current protection point, thereby protecting the safety of the equipment and avoiding overcurrent alarms caused by sudden load or interference.
The overvoltage suppression function can avoid the overvoltage alarm of the ac drive during acceleration and deceleration. When the ac drive bus voltage reaches or exceeds the protection point during acceleration and deceleration, the overvoltage suppression function can automatically adjust the operating frequency to suppress the rise of the bus voltage, thereby protecting the safety of the equipment. Avoid the overvoltage alarm caused by the increase of the bus voltage of the ac drive.
Wide speed range
The output frequency range is 0-320Hz, which meets the requirements of light load notification, heavy load and low speed of lifting equipment, and improves the efficiency of the equipment.
Super overload capacity
150% rated current for 1 minute, 180% rated current for 10 seconds, and 200% rated current for 0.5 seconds.
Stall protection function (closed loop mode)
When it is detected that the actual speed exceeds 115% of the rated speed during operation, the ac drive quickly sends out a brake signal to realize emergency braking.
Dedicated brake control logic
Control the brake (brake) of the lifting equipment to open and close in a reasonable time sequence to ensure the safety and reliability of the system.
Wide voltage input range
Automatic voltage stabilization: to ensure that when the grid voltage drops, the output can still meet the torque output requirements of the lifting equipment, and the allowable input voltage fluctuation range is ± 20%.