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　　With the rapid development of the economy, in engineering construction, larger and more complex projects have higher requirements for lifting machinery, which puts higher requirements on the design and manufacturing of lifting machinery. The rated lifting weight of many types of cantilever cranes (rotating arm cranes) has been constantly refreshed.

　　The product life cycle is shortened, the crane renewal is accelerated, and people's expectations for crane delivery period are getting higher and higher. In order to meet users' requirements for diversification and personalization of products, enterprises' ability to develop new products is becoming stronger and stronger, and the development cycle of spiral arm cranes is greatly shortened. Due to the application of new technologies, the manufacturing cycle and life cycle of cranes have been shortened, which has accelerated the speed of renewal of spiral arm cranes. Diversification of production methods.

　　With the diversification and personalization of user needs and the requirements for product delivery time, some companies need to adjust their production methods to meet the requirements of different users. The driving methods of the cantilever crane operation mechanism can be divided into two categories: centralized driving, that is, a motor drives a long drive shaft to drive the driving wheels on both sides; the other is to drive separately, that is, the driving wheels on both sides are driven by one motor.

　　Medium and small bridge cranes mostly use a "three-in-one" driving method that combines brakes, reducers and motors. To facilitate installation and adjustment of ordinary bridge cranes with large lifting, the driving device often uses universal couplings. Frequency conversion speed regulation is to change the synchronous rotation speed by changing the motor stator power supply frequency to achieve speed regulation. To make the power supply frequency of an asynchronous motor variable, a frequency converter must be used. A variable frequency speed regulation device is a power supply device that converts constant voltage and constant frequency power to variable voltage and variable frequency power.

　　The control mode of the inverter is divided into two forms: open-loop and closed-loop control, and users can choose at will. The frequency conversion speed control electronic control equipment is programmable and can be composed of power supply inlet switches, line contactors, auxiliary switches, auxiliary relays, etc.

　　With the rapid development of the economy, in engineering construction, larger and more complex projects have higher requirements for lifting machinery, which puts higher requirements on the design and manufacturing of lifting machinery. The rated lifting weight of many types of cantilever cranes (rotating arm cranes) has been constantly refreshed.

　　The product life cycle is shortened, the crane renewal is accelerated, and people's expectations for crane delivery period are getting higher and higher. In order to meet users' requirements for diversification and personalization of products, enterprises' ability to develop new products is becoming stronger and stronger, and the development cycle of spiral arm cranes is greatly shortened. Due to the application of new technologies, the manufacturing cycle and life cycle of cranes have been shortened, which has accelerated the speed of renewal of spiral arm cranes. Diversification of production methods.

　　With the diversification and personalization of user needs and the requirements for product delivery time, some companies need to adjust their production methods to meet the requirements of different users. The driving methods of the cantilever crane operation mechanism can be divided into two categories: centralized driving, that is, a motor drives a long drive shaft to drive the driving wheels on both sides; the other is to drive separately, that is, the driving wheels on both sides are driven by one motor.

　　Medium and small bridge cranes mostly use a "three-in-one" driving method that combines brakes, reducers and motors. To facilitate installation and adjustment of ordinary bridge cranes with large lifting, the driving device often uses universal couplings. Frequency conversion speed regulation is to change the synchronous rotation speed by changing the motor stator power supply frequency to achieve speed regulation. To make the power supply frequency of an asynchronous motor variable, a frequency converter must be used. A variable frequency speed regulation device is a power supply device that converts constant voltage and constant frequency power to variable voltage and variable frequency power.

　　The control mode of the inverter is divided into two forms: open-loop and closed-loop control, and users can choose at will. The frequency conversion speed control electronic control equipment is programmable and can be composed of power supply inlet switches, line contactors, auxiliary switches, auxiliary relays, etc.