According to the conventional classification, lifting machinery can be divided into bridge crane, gantry crane, portal crane, tower crane, lifting crane, winch, etc. According to the purpose and world share, more than 80% of the crane share is mainly electric hoist.
Our company has independently developed hpvfv frequency converter, which has been successfully applied to the boiler tilting furnace in the steelmaking plant of Fujian Dingxin Industrial Company; The boiler tilting furnace in the steelmaking plant of Fujian Dingxin Industrial Company has always adopted ABB frequency conversion control (similar domestic boilers are basically controlled by imported brand frequency converters). Due to many factors such as high price of foreign brands and untimely after-sales service.
Jiangyin Lanwei is an enterprise specializing in the production of hoisting equipment. Its electric hoist always adopts the fast and slow gear conversion of two speed motor to lift and lower, and changes the lifting rope speed through the gearbox. Because the speed ratio of the gearbox is fixed and the speed of the two speed motor is certain, it can only operate in two gears, which is difficult to meet the requirements when the customer requires accurate and slow lifting or lowering conditions.