A control method for parallel operation of permanent magnet synchronous motors for crane and cart travel
A permanent magnet synchronous motor, operation control technology, applied in the directions of transportation, packaging, load hanging components, etc., can solve problems such as poor control accuracy, and achieve the effects of high dynamic balance, simple structure and high power factor
Active Publication Date: 2021-06-29
SHANGHAI ZHENHUA HEAVY IND
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Problems solved by technology
[0004] The present invention aims at the problem of poor control accuracy of a driver with multiple synchronous motors in the traditional vehicle industry control, and proposes a parallel operation control method for permanent magnet synchronous motors traveling on cranes and carts. The present invention can realize high-precision control and meet the requirements of The demand for high-precision cart control at the wharf is suitable for the control of multiple permanent magnet synchronous motors driven by multiple drives of shore container crane equipment, and is more energy-saving and efficient than traditional control methods
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[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] combine figure 1 , The traveling mechanism of the crane cart is composed of PLC controller and frequency converter, permanent magnet synchronous motor unit, resolver, speed feedback and so on. The PLC controller is connected to the permanent magnet synchronous motor unit through multiple frequency converters, the permanent magnet synchronous motor unit is connected to the rotary transformer, and the permanent magnet synchronous motor unit drives the rotary transformer and is connected to the frequency converter through speed feedback.
[0022] Usually, there are 16 motors in the traveling mechanism of the crane cart, 8 on each side, symmetrically arranged on both sides, divided into sea side and land side. Both sides adopt the position synchronous control method to realize the synchronous operation of both sides, "comm...
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The invention discloses a method for controlling the parallel operation of permanent magnet synchronous motors for crane carts, and relates to large crane equipment used in container terminals. The invention has simple structure and high dynamic balance, and the motor adopts permanent magnet synchronous motors. The magnetic synchronous motor is driven by an independent driver, and the resolver feeds back the speed to form a closed-loop control; the permanent magnet synchronous motor has high efficiency, high power factor, and energy saving, which can solve the problem of increasing power demand and increasing motor size and weight. question. The present invention can realize high-precision control, meet the requirement of high-precision cart control at the wharf, is suitable for the control of multiple permanent magnet synchronous motors driven by multiple drives of container crane equipment on the shore, and is more energy-saving and efficient than traditional control methods.
Description
technical field [0001] The invention relates to a large-scale crane equipment used in a container terminal, and more specifically refers to a method for controlling the parallel operation of a permanent magnet synchronous motor running on a crane cart. Background technique [0002] With the continuous development of the port industry, the operation progress of crane equipment is getting higher and higher. The traditional control method of crane equipment mainly adopts open-loop or closed-loop control with one driver and multiple motors. This control method has no speed feedback or There is only one wheel motor speed feedback, and the control accuracy is poor, which cannot meet the increasingly high-precision control requirements. And as the power demand increases, the volume and weight of the motor further increase. Contents of the invention [0003] (1) Solved technical problems [0004] The present invention aims at the problem of poor control accuracy of a driver with...
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IPC IPC(8): B66C13/22B66C13/16
CPCB66C13/16B66C13/22
Inventor 杨雷忠许文彬褚华强黄中元傅夏杨龚海霞胡军薛帅斌费文豪
Owner SHANGHAI ZHENHUA HEAVY IND