Energy recovery method of servo press

Abstract

The invention discloses an energy recovery method for a servo press. The energy recovery method comprises the following steps that S1, angular acceleration parameters of operation of the servo press are obtained; s2, whether the servo press meets the energy recovery condition or not is determined according to the obtained angular acceleration parameter; s3, under the condition that the energy recovery condition is met, the servo press is controlled to carry out energy recovery; s4, under the condition that the energy recovery condition is not met, whether the press machine meets energy feedback or not is judged; and S5, under the condition that energy feedback is met, whether the press machine needs to use the recycled energy for power supply of the press machine or not is judged. According to the energy recovery method of the servo press, the angular acceleration parameter of the servo press is obtained in real time, whether the energy recovery condition is met or not is judged according to the change of the angular acceleration, and therefore accurate control over the energy recovery opportunity is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of presses, in particular to an energy recovery method for a servo press. Background Art

[0002] With the rapid development of industrial automation and intelligent manufacturing technology, servo presses play an increasingly important role in industrial production. However, traditional servo presses generate a lot of energy waste during operation, especially during deceleration or braking. This energy is usually dissipated in the form of heat through resistors, which not only reduces energy utilization efficiency, but also increases production costs and environmental burdens. In order to solve this problem, the industry has begun to study the energy recovery technology of servo presses, aiming to recover and reuse the energy generated during braking or deceleration, thereby improving energy utilization efficiency and reducing energy waste.

[0003] However, most existing energy recovery methods have problems such as single judgment conditions, low energy recovery efficiency, and limited ways to use the recovered energy. For example, some methods only determine whether to perform energy recovery based on the operating speed or braking status of the press, ignoring the dynamic changes during the operation of the press, resulting in unsatisfactory timing and efficiency of energy recovery. In addition, existing energy recovery methods often only use the recovered energy for simple storage or reuse, without flexible allocation and scheduling according to the actual needs of the press, thus limiting the actual application effect of energy recovery technology. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and to provide an energy recovery method for a servo press.

[0005] The technical solution of the present invention is: an energy recovery method for a servo press, comprising the following steps:

[0006] S1: Get the angular acceleration parameters of the servo press;

[0007] S2: determining whether the servo press meets the energy recovery condition according to the obtained angular acceleration parameter;

[0008] S3: When the energy recovery conditions are met, the servo press is controlled to recover energy;

[0009] S4: When the energy recovery condition is not met, determine whether the press meets the energy feedback condition;

[0010] S5: Under the condition that energy feedback is satisfied, determining whether the press needs to use the recovered energy for powering the press;

[0011] S6: The press works normally without satisfying energy feedback.

[0012] It also includes setting a first angular acceleration, a second angular acceleration and a third angular acceleration; the energy recovery condition satisfied in S2 is: whether the acquired real-time angular acceleration of the press is less than the first angular acceleration.

[0013] The energy recovery is divided into two types according to the comparison between the acquired real-time angular acceleration and the second angular acceleration: when the real-time angular acceleration is greater than the second angular acceleration, the press charges the battery; when the real-time angular acceleration is less than the second angular acceleration, the press charges the capacitor.

[0014] The conditions for determining whether energy feedback is satisfied in S4 are: whether the real-time angular acceleration is greater than the third angular acceleration; if the real-time angular acceleration is greater than the third angular acceleration, the power grid, the battery and the capacitor supply power to the press at the same time; if the real-time angular acceleration is less than the third angular acceleration, the press operates normally.

[0015] There are two states of normal working of the press: the power grid supplies power to the press and the power grid and the battery supply power to the press at the same time.

[0016] When the SOC of the capacitor is less than a set threshold, the battery charges the capacitor.

[0017] The storage battery is connected to an external photovoltaic energy source, and the storage battery can be charged at any time.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects: a method for energy recovery of a servo press, which obtains the angular acceleration parameters of the servo press in real time, and determines whether the energy recovery conditions are met according to the change of the angular acceleration, thereby realizing precise control of the energy recovery timing. Compared with the prior art, the beneficial effects of the present invention are mainly reflected in the following aspects:

[0019] (1) By setting the first angular acceleration, the second angular acceleration and the third angular acceleration as judgment conditions, the present invention can more accurately judge when the servo press enters the energy recovery stage, thereby effectively improving the efficiency and accuracy of energy recovery.

[0020] (2) Based on the comparison result between the real-time angular acceleration and the second angular acceleration, the present invention uses the recovered energy to charge the battery and the capacitor respectively, thereby realizing flexible storage and utilization of energy; at the same time, when the capacitor SOC is less than the set threshold, the battery can also charge the capacitor, thereby further improving the energy utilization efficiency.

[0021] (3) When the energy feedback conditions are met, the present invention can flexibly select the power grid, battery and capacitor as the power supply source according to the size of the real-time angular acceleration, so as to provide a stable and reliable power supply for the servo press; this optimized energy feedback mechanism not only improves the energy utilization efficiency, but also enhances the stability and reliability of the press.

[0022] (4) By recovering and reusing the energy generated by the servo press during braking or deceleration, the present invention effectively reduces production costs and energy consumption, reduces heat emissions and environmental pollution, and is in line with the concepts of green manufacturing and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 The figure is a flow chart of the energy recovery method of the servo press of the present invention. DETAILED DESCRIPTION

[0025] (Example 1)

[0026] See Figure 1 The energy recovery method of the servo press of this embodiment comprises the following steps:

[0027] S1: Get the angular acceleration parameters of the servo press;

[0028] S2: determining whether the servo press meets the energy recovery condition according to the obtained angular acceleration parameter;

[0029] S3: When the energy recovery conditions are met, the servo press is controlled to recover energy;

[0030] S4: When the energy recovery condition is not met, determine whether the press meets the energy feedback condition;

[0031] S5: Under the condition that energy feedback is satisfied, determining whether the press needs to use the recovered energy for powering the press;

[0032] S6: The press works normally without satisfying energy feedback.

[0033] Furthermore, it also includes setting a first angular acceleration, a second angular acceleration and a third angular acceleration, wherein the first acceleration, the second acceleration and the third acceleration are all set values ​​manually calculated according to the system parameters of the press; the energy recovery condition satisfied in S2 is: whether the real-time angular acceleration of the press obtained is less than the first angular acceleration.

[0034] Furthermore, the energy recovery is divided into two types according to the comparison between the acquired real-time angular acceleration and the second angular acceleration: when the real-time angular acceleration is greater than the second angular acceleration, the press charges the battery; when the real-time angular acceleration is less than the second angular acceleration, the press charges the capacitor.

[0035] Furthermore, the condition for determining whether energy feedback is met in S4 is: whether the real-time angular acceleration is greater than the third angular acceleration; if the real-time angular acceleration is greater than the third angular acceleration, the power grid, battery and capacitor simultaneously supply power to the press; if the real-time angular acceleration is less than the third angular acceleration, the press operates normally.

[0036] Furthermore, there are two states of normal operation of the press: the power grid supplies power to the press and the power grid and the battery supply power to the press at the same time.

[0037] Furthermore, when the SOC of the capacitor is less than a set threshold, that is, less than an artificially set value, such as 70%, the battery charges the capacitor, and the battery is prohibited from charging the capacitor during the energy recovery phase.

[0038] Furthermore, the storage battery is connected to an external photovoltaic energy source, so that the storage battery can be charged at any time.

[0039] The energy recovery method of the servo press in this embodiment changes the original energy recovery device from a single supercapacitor to a composite device of a capacitor and a battery, so that clean energy outside the power grid can be used, which is not only more energy-saving but also environmentally friendly.

[0040] This embodiment provides an efficient, flexible and reliable servo press energy recovery method, which adds batteries and capacitors on the traditional basis. Energy can be flexibly stored and utilized through batteries and capacitors, and provides new technical approaches and solutions for energy conservation, emission reduction and energy efficiency improvement in industrial production.

[0041] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for energy recovery of a servo press, characterized in that: The following steps are involved: S1: Get the angular acceleration parameters of the servo press; S2: determining whether the servo press meets the energy recovery condition according to the obtained angular acceleration parameter; S3: When the energy recovery conditions are met, the servo press is controlled to recover energy; S4: When the energy recovery condition is not met, determine whether the press meets the energy feedback condition; S5: Under the condition that energy feedback is satisfied, determining whether the press needs to use the recovered energy for powering the press; S6: The press works normally without satisfying energy feedback.

2. The energy recovery method of a servo press according to claim 1, characterized in that: It also includes setting a first angular acceleration, a second angular acceleration and a third angular acceleration; the energy recovery condition satisfied in S2 is: whether the acquired real-time angular acceleration of the press is less than the first angular acceleration.

3. The energy recovery method of a servo press according to claim 2, characterized in that: The energy recovery is divided into two types according to the comparison between the acquired real-time angular acceleration and the second angular acceleration: when the real-time angular acceleration is greater than the second angular acceleration, the press charges the battery; when the real-time angular acceleration is less than the second angular acceleration, the press charges the capacitor.

4. The energy recovery method of a servo press according to claim 3, characterized in that: The condition for determining whether the energy feedback is satisfied in S4 is: whether the real-time angular acceleration is greater than the third angular acceleration; If the real-time angular acceleration is greater than the third angular acceleration, the power grid, battery and capacitor supply power to the press at the same time; if the real-time angular acceleration is less than the third angular acceleration, the press works normally.

5. The energy recovery method of a servo press according to claim 4, characterized in that: There are two states of normal working of the press: the power grid supplies power to the press and the power grid and the battery supply power to the press at the same time.

6. The energy recovery method of a servo press according to claim 3, characterized in that: When the SOC of the capacitor is less than a set threshold, the battery charges the capacitor.

7. The energy recovery method of a servo press according to claim 3, characterized in that: The storage battery is connected to an external photovoltaic energy source, and the storage battery can be charged at any time.

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