As urban traffic congestion becomes more and more serious, various large and medium-sized cities have made urban construction and transportation the top priority in order to solve the traffic congestion. Reduce people's commuting difficulties during peak hours. Since the world's first subway was opened to traffic in London, England in 1863, the subway has become a highly regarded and ideal mode of transportation due to its advantages such as the smallest area and space, large transportation energy, fastest running speed, and low environmental pollution. The gantry crane walking trolley is indispensable for subway construction. The gantry crane walking trolley is designed according to the factory concept, streamlined operation, and mechanized construction. The production and storage and transportation areas are covered by gantry cranes. The mechanical advantages are used to improve production efficiency and speed up the construction progress. In order to ensure the completion of the construction period, the humanized mechanical equipment is designed. The following introduces the application of Easydrive M200 series in the construction of subway gantry cranes.
2. Application on Gantry Crane
In the process of traveling, the four track wheel motors often run out of sync, causing the entire vehicle body of the vehicle to deviate from the track, causing the wheels to squeeze the track while the vehicle is traveling, making noise, and the vehicle body shakes. In severe cases, the track Shift. In the process of walking, three speed sections are required to facilitate the control of walking stably and safely. If there is cargo on the hook, the speed is required to be slow and the low-frequency starting torque is large. If the inverter is not used to control the motor speed, it is very troublesome to achieve.
3. Technical parameters of easy drive inverter
M200 high-performance general-purpose inverter is a general-purpose inverter newly developed by Shenzhen Yidrive Electric Co., Ltd. based on a speed sensorless full current vector algorithm control. Using advanced SPWM technology. Using advanced vector algorithm, 0.5HZ can output 180% rated torque, stable speed accuracy 0.5%, external terminal combination can be set to 16 speeds, perfect protection measures: overvoltage, undervoltage, input phase loss, output can be realized Nearly 20 types of fault protection, including phase loss, overload, overheating, overcurrent, external terminal failure, communication failure, current detection error, motor tuning failure, etc., are highly reliable. It can fully meet the on-site process requirements.
Fourth, on-site inverter requirements
The installation in the power distribution cabinet requires small volume. One forward gear, one backward gear, three speed stages, low speed 15HZ, medium speed 30HZ, high speed 50HZ. With braking resistor. A 5.5KW inverter with four 0.75KW motors.
Five, field application electrical control and inverter wiring circuit diagram