Motor matching control system for hydraulic machine

Abstract

The invention relates to a motor matching control system for a hydraulic machine, which comprises a hydraulic machine PLC, a motor starting switch assembly connected with the hydraulic machine PLC and arranged in a control box of the hydraulic machine, hydraulic system motors connected with the motor starting switch assembly, a touch screen connected with the hydraulic machine PLC, and a motor starting circuit and a hydraulic machine PLC input-output circuit connected with the hydraulic machine PLC and the hydraulic system motors respectively. The motor starting circuit comprises a main circuit connected with a motor and a motor starting control circuit connected with the hydraulic machine PLC. The main circuit adopts star-triangle reduced-voltage starting to start the motor, and comprises a plurality of groups of circuit breakers of which one end is connected with a three-phase power supply and the number is the same as that of the hydraulic system motors, wherein the other end of each group of the circuit breakers is connected with one motor through two groups of switching contacts of a corresponding AC contactor, and the motor is also connected with another group of switching contacts of the AC contactor. The motor matching control system is provided with a 'motor selection' frame[,] so that a user can flexibly change the motor matching according to technological requirements.

Description

technical field [0001] The invention belongs to a hydraulic machine control, in particular to a motor matching control system of a hydraulic machine capable of automatically controlling the starting of a motor and reducing energy waste. Background technique [0002] At present, the frame-type automobile longitudinal beam products hydraulic press is mainly engaged in the pressing and blanking process of large-scale automobile bottom beams, and can also be engaged in the pressing, bending, forming and other processes of other plastic materials. Hydraulic presses for automotive longitudinal beam products generally have a relatively large tonnage and many high-power motors. The existing control system is only controlled by electrical hardware. Once the system is generated, it is difficult to change and has poor flexibility. Moreover, as long as it is started, all motors are turned on so that some unnecessary The motor is idling, which will inevitably cause energy waste, which no...

AI Technical Summary

Problems solved by technology

Hydraulic presses for automotive longitudinal beam products generally have a relatively large tonnage and many high-power motors. The existing control system is only controlled by electrical hardware. Once the system is generated, it is difficult to change and has poor flexibility. Moreover, as long as it is started, all motors are turned on so that some unnecessary The motor is idling, which will inevitably cause energy waste, which not only increases the cost, wastes energy, and reduces production efficiency, but also is not conducive to the management concept of modern industrial production; Through "motor selection", the user can flexibly change the matching of the motor according to the process requirements, thereby reducing waste and reducing production costs

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