Constant power control method based on medium-voltage motor-driven proportional pump
A technology of constant power control and motor drive, applied in the driving device of the forging press, etc., can solve the problems of large starting current, no self-checking, large energy loss, etc., to reduce the design and production cost, reduce the failure rate, prevent the The effect of supercurrent
Active Publication Date: 2018-07-31
TIANJIN TIANDUAN PRESS CO LTD
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Problems solved by technology
[0002] With the rapid development of forging hydraulic press technology, the production of large forging hydraulic presses has a wide range of applications and market prospects. The traditional forging hydraulic press design uses a low-voltage motor, which has a large energy loss and a large starting current to impact the power grid. At the same time, the traditional forging hydraulic press is starting In the process, it generally does not have the function of self-inspection. In order to improve the safe working performance of forging hydraulic presses, most of them use manual self-inspection. However, it is found in practice that the process of manual self-inspection is cumbersome and the error rate is relatively high. Therefore, , it is relatively important to design and develop a constant power control method based on a medium-voltage motor-driven proportional pump that can overcome the above defects
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[0015] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0016] see figure 1 , a constant power control method based on a medium-voltage motor-driven proportional pump, which is mainly used in forging hydraulic presses, especially in large-scale forging hydraulic presses. The forging hydraulic presses are equipped with a detection system for self-inspection; the detection system includes multiple A sensor, an analog-to-digital converter, a control module, an alarm, and a display; wherein: the plurality of sensors include a position sensor for detecting the position of the slider, a workpiece sensor for detecting the position of the workpiece, and a sensor for detecting the pressure of the slider. A pressure sensor, a flow sensor for detecting the output flow of the proportional pump, a temperature ...
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A constant power control method based on a medium-voltage motor-driven proportional pump, comprising the following steps: Step 1, self-inspection of the forging hydraulic press; Step 2, if the diagnosis result of the control module is normal, then perform Step 3, such as the diagnosis result of the control module If it is not normal, send an alarm signal and return to step 1; step 3, the medium-voltage motor of the forging hydraulic press drives the proportional pump to work, and the proportional pump changes the opening of the spool through the amplifying plate according to the process action to output different flow rates to ensure the operation of the slider Speed and beat; step 4, the forging hydraulic machine enters the workpiece pressing action stage, the control module collects the pressure information of the slider through the pressure sensor, so as to control the flow rate of the proportional pump, the pressure of the slider keeps rising and the speed is constant in the initial stage; when the power reaches the middle pressure After the rated value of the motor enters the constant power closed-loop control, the pressure of the slider continues to increase while the speed continues to slow down, so as to ensure the rated power value of the medium voltage motor and complete the pressing and forming of the workpiece.
Description
technical field [0001] The invention belongs to the technical field of medium-voltage motors, and in particular relates to a constant power control method based on a medium-voltage motor-driven proportional pump with high safety factor. Background technique [0002] With the rapid development of forging hydraulic press technology, the production of large forging hydraulic presses has a wide range of applications and market prospects. The traditional forging hydraulic press design uses a low-voltage motor, which has a large energy loss and a large starting current to impact the power grid. At the same time, the traditional forging hydraulic press is starting In the process, it generally does not have the function of self-inspection. In order to improve the safe working performance of forging hydraulic presses, most of them use manual self-inspection. However, it is found in practice that the process of manual self-inspection is cumbersome and the error rate is relatively high....
Claims
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IPC IPC(8): B21J9/20
Inventor 郭威
Owner TIANJIN TIANDUAN PRESS CO LTD