Recently, the low-speed and high-torque permanent magnet direct drive frequency conversion control system provided by Wolong Electric Drive was successfully debugged on the Guilin Southern Cement Powder Concentrator. After on-site testing, when the maximum production speed is 500 tons/hour, compared with the original asynchronous motor +The reducer solution can achieve a power saving rate of more than 40% and save an area of more than 50%. In addition, by reducing design redundancy, the low-speed permanent magnet direct drive solution also reduces failure points, making the system more reliable and easier to maintain.
Guilin Southern Cement Co., Ltd. is a subsidiary of Southern Cement in Guilin. The company’s main business is the production of cement clinker, cement finished products, cement products, and self-generated waste heat power generation. Under the dual requirements of the “dual carbon” policy and environmental protection, Guilin Southern Cement decided to upgrade a 14-year-old powder separator as a pilot project, replacing the old three-phase asynchronous motor and reducer with Wolong’s permanent magnet DC The drive motor is used for driving.
Wolong’s low-speed permanent magnet direct drive system solutions are suitable for mining, coal, shipbuilding, metallurgy, chemical industry, building materials, electric power, oil fields and other fields; in addition to powder concentrators, the solution can be widely used in belt conveyors, scraper conveyors, grinding mills and other fields. Machines, mixers, elevators or other mechanical equipment that require low-speed operation. Has the following technical advantages:
Safe and reliable
1. Direct drive without deceleration system, smoother operation and higher reliability
2. There is no impact when starting with variable frequency, which can solve the harm caused by dynamic tension waves to conveyor belts and equipment in belt conveyor situations.
3. Good controllability, solving the multi-drive power balance problem of long-distance and large-capacity conveyors
4. The system is matched with reactors and filtering devices to avoid pollution to the power grid and interference with other equipment.
Energy efficient
1. High efficiency area of permanent magnet motor within 0~120% rated load range
2. The intermediate loss of direct drive is approximately 0, and the transmission efficiency is approximately 100%.
intelligent control
1. It can achieve smooth start-up under heavy load, has low-speed belt inspection function, and achieves multi-drive power balance.
2. The S-curve start and stop of the conveyor can be realized, and the operating speed can be adjusted according to the working conditions.
3. Solve the braking and emergency stopping problems during down operation and realize electric energy feedback
Safe and reliable
No deceleration system and associated hydraulic system and cooling system, low maintenance difficulty, small workload and low cost
Post time: Nov-23-2023
