Our Frequency Conversion Hoist is widely used to serve the increasing demand for high-rise construction we offer the high speed VF hoist, with a max. lifting speed of 96m/min. A few salient features of these hoists are
* Adopts the most advanced VF speed control device and microcomputer programmable logic controller.
* Step-less speed control helps eliminate the concussion during start-up and braking, steadies the operation and ensures automated levelling.
* Adopts open loop VF control; the speed preci sion can reach +_ 2~3%. Realising the accu rate low speed positioning of the hoist, thus avoiding slipping during downward stopping of the hoist.
* The VF system has current restriction function, suring lower current in motor start-up and reduces the concussion to power supply. This reduces the energy consumption are site.
* The steadiness during operation, mitigates concussion to mechanical parts, reduces wears of rack, pinion and the brake, prolonging the life of these parts.
* The VF system also has the over voltage protection, low-voltage protection, over-current, overload and anti-stalling protection functions.