Novel driving system and control device of servo press

Abstract

The invention relates to the technical field of forging machines and motor control, in particular to a novel driving system and control device of a servo press. The novel driving system and control device of the servo press comprises a servo press external input signal, a human-computer interaction interface, a motion control function module, a high-level protocol stack COE, a TCP / IP protocol stack, an instruction analysis module, a ucos II embedded operating system, a motor control state machine, a motor control module, a current signal conditioning circuit, a position signal conditioning circuit, a fault protection module, a PWM module, other functional hardware, a power driving circuit, a six-phase full-bridge IGBT module, two three-phase linear motors, position sensors of the two three-phase linear motors, sampling circuits and a sliding block, wherein the current signal conditioning circuit, the position signal conditioning circuit, the fault protection module and the PWM module belong to hardware. According to the technical scheme, a motion controller and two servo controllers are integrated, communication delay is eliminated, a gear is omitted, a gap is eliminated, and the control precision of the position of the sliding block is improved; and due to the fact that the two motors are adopted for independent control, closed-loop real-time control over left-right balance of the sliding block can be achieved.

Description

technical field [0001] The invention relates to the technical field of forging machinery and motor control, in particular to a novel driving system and control device of a servo press. Background technique [0002] Patent No. CN105700453B "A Control System and Its Control Method for an Intelligent Servo Press" proposes a control system scheme for a servo press using Inovance PLC and Inovance servo drivers. The scheme is novel, but there is a fatal Disadvantages - not universal, the transmission ratio of the servo transmission mechanism stated in the article is the mechanical transmission ratio calculated by the CPU, which cannot realize the motion control function of presses of different connecting rod types, because the deceleration of the entire motion control process Ratio and transmission ratio are calculated by the servo control, not entered according to the mechanical design dimensions. The root cause of this problem is that the control system is equipped with Inovanc...

AI Technical Summary

Problems solved by technology

Since the motion controller collects the position information of the slider separately, there is a transmission delay in the communication process, which may easily cause inconsistency in the rotation of the two motors

At the same time, if dual motor drives are used, there is still a transmission delay in the communication between the two motor controllers. When the slider is independently controlled to run, it will cause the slider to be unbalanced.

And because the rotating motor must use cranks, connecting rods, reducers and other mechanisms, there will inevitably be gear gaps. Therefore, position compensation is conventionally added to the position control loop. Due to the non-linearity of the gap, the synchronous running accuracy of the slider will still be affected.

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