Transformation Scheme of AU500 Dedicated Inverter for Crane

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Introduction As the demand for speed regulation performance in industrial production cranes continues to rise, traditional methods like rotor resistance speed regulation for wound rotor induction motors, thyristor stator voltage regulation, and cascade speed regulation have common drawbacks. These include periodic maintenance requirements for components such as collector rings and brushes in wound rotor induction motors, leading to frequent failures. Additionally, the extensive use of relays and contactors increases on-site maintenance, resulting in high failure rates and poor overall technical indicators. To address these issues, the widespread application of AC variable frequency speed control technology in the industrial sector has provided a new solution for precise and high-quality speed regulation of cranes driven by AC asynchronous motors.

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Characteristics of Crane Operation Crane operation characteristics include the need for a large starting torque, smooth transition between inverter torque and mechanical brake torque to prevent hook slipping, management of regenerative energy during rapid deceleration, and smooth control of impact loads during sudden changes in load.

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Introduction to Ausenist AU500 Crane Dedicated Inverter

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Main Functions and Features The Ausenist AU500 crane dedicated inverter is a high-performance vector inverter designed specifically for the crane industry by Shenzhen Ausenist Electrical Co., Ltd. It is used for AC stepless speed regulation of various crane mechanisms such as lifting, pitching, variable range, main and auxiliary trolleys, rotation, and grab buckets. Key functions and features include:

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·Wide speed regulation range for precise control and positioning.

·Soft start and stop functions to reduce mechanical transmission impact, improving structural load-bearing capacity and extending crane lifespan.

·Brake logic control and monitoring for accurate brake engagement and closure control sequence, ensuring safety and reliability.

·Light load acceleration for doubling speed during empty hook or light load operation, enhancing loading and unloading efficiency.

·Control circuit power supply and main circuit power supply can be independently controlled for improved safety during user debugging, fault diagnosis, and maintenance.

·Supports MODBUS communication protocol for communication between multiple inverters and PLCs.

·Hazardous speed monitoring, quick stop, and overspeed protection for real-time monitoring of motor speed, triggering fault alarms and immediate shutdown if the motor speed exceeds the set maximum allowable speed or deviation value.

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Brake Function Explanation The AU500 crane dedicated inverter includes built-in mechanical brake logic sequence control to solve the problem of mechanical brake logic. This feature ensures smooth switching between inverter output torque and mechanical brake torque to prevent hook slipping during instant engagement or disengagement of the mechanical brake.

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Application Range The AU500 crane dedicated vector inverter, with excellent torque control performance, is widely applicable to various port machinery such as shore container cranes (STS), rail-mounted container gantry cranes (RMG), rubber-tired container gantry cranes (RTG), gantry cranes, shipbuilding gantry cranes, ship loaders, ship unloaders, overturning machines, stacking and reclaiming machines, and various types of general bridge, gantry, and tower cranes, as well as hoisting machinery like lifting beams, bridge cranes, etc., for AC stepless speed regulation of lifting, variable range, main and auxiliary trolleys, rotation, grab buckets, and other mechanisms.

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Conclusion The use of Ausenist inverters has addressed the high failure rates, complex wiring, inability to smoothly regulate speed, and high maintenance requirements of old speed control systems. Simultaneously, it has simplified the design process, bringing electrical control performance to a new level. Its reliability and advanced features are unparalleled by old speed control systems, making it well-received by users due to its superior performance-to-price ratio.