阅读说明：本技术 一种电晕机有效功率动态平衡系统及控制方法 (Dynamic balance system and control method for effective power of corona machine ) 是由 陈大龙 陈伟 陆金华 于 2021-09-08 设计创作，主要内容包括：本发明涉及一种电晕机有效功率动态平衡系统及控制方法,所述的电晕机内设置控制器单元以及驱动电路,控制器单元将驱动信号传递至驱动电路,驱动电路控制电晕机运行,在所述的电晕机的母线上设置电压传感器与电流传感器,所述的电压传感器实时采集母线电压信号传递至控制器单元,所述的电流传感器实时采集母线电流信号传递至控制器单元,控制器单元接收电压信号与电流信号进行处理后输出控制信号至驱动电路。通过上述系统以及控制方法,在实际工作过程中每隔一定时间对有效功率与设定功率进行对比,若出现偏差则通过调整占空比进行修正,使得在电晕机使用过程中的有效功率始终处于动态平衡中,保证电晕机处于最优电晕效果中,提高产品的质量。(The invention relates to a dynamic balance system and a control method for effective power of a corona machine, wherein a controller unit and a driving circuit are arranged in the corona machine, the controller unit transmits a driving signal to the driving circuit, the driving circuit controls the running of the corona machine, a voltage sensor and a current sensor are arranged on a bus of the corona machine, the voltage sensor acquires a bus voltage signal in real time and transmits the bus voltage signal to the controller unit, the current sensor acquires a bus current signal in real time and transmits the bus current signal to the controller unit, and the controller unit receives the voltage signal and the current signal to process and then outputs a control signal to the driving circuit. Through the system and the control method, the effective power is compared with the set power at regular intervals in the actual working process, if deviation occurs, the duty ratio is adjusted to correct, so that the effective power in the using process of the corona machine is always in dynamic balance, the corona machine is ensured to be in the optimal corona effect, and the product quality is improved.)

1. The utility model provides a corona machine effective power dynamic balance system, the corona machine in set up controller unit and drive circuit, the controller unit transmits drive signal to drive circuit, drive circuit control corona machine operation, its characterized in that set up voltage sensor and current sensor on the generating line of corona machine, voltage sensor gather generating line voltage signal in real time and transmit to the controller unit, current sensor gather generating line current signal in real time and transmit to the controller unit, the controller unit receives voltage signal and current signal and handles back output control signal to drive circuit.

2. The corona machine effective power dynamic balance system of claim 1, wherein the controller unit is a single chip, a DSP chip, a CPLD chip or an FPGA chip.

3. A method for controlling dynamic balance of effective power of corona machine is characterized by that said method includes the following steps,

s1, reading a prestored resonant frequency value, and adjusting the output PWM duty ratio to a set value;

s2, outputting and operating for a set time according to the current resonant frequency value and the duty ratio, wherein the state to be output is stable;

s3, obtaining an effective power value under the current resonance frequency;

and S4, comparing the effective power value with a preset set power value, if the effective power value is equal to the set power value, directly returning to the step S2 for circulation, and if the effective power value is not equal to the set power value, adjusting the value of the duty ratio and returning to the step S2 for circulation.

4. A method for controlling the dynamic balancing of the effective power of a corona machine according to claim 3, characterized in that said prestored values of resonant frequency are in the range of 10KHz to 50 KHz.

5. The method as claimed in claim 3, wherein the setting time in step S2 is in the range of 100 us-5S.

6. The method for controlling dynamic balance of the effective Power of the corona machine according to claim 3, wherein the effective Power value Power in step S3 is obtained by collecting the voltage value Vdc and the current value Idc of the corona machine bus and calculating the values according to a formula Power-Vdc-Idc.

7. The method for controlling dynamic balance of effective power of corona machine according to claim 3, wherein in step S4, when the effective power value is not equal to the set power value, it is determined whether the effective power value is greater than the set power value, if yes, the step S2 is returned after decreasing the duty ratio according to the set decrease amount, otherwise, the step S2 is returned after increasing the duty ratio according to the set increase amount.

8. The method as claimed in claim 7, wherein the set increment and decrement are the same.

9. The method as claimed in claim 3, wherein the set value of the duty ratio in step S1 is 0.

Technical Field

The invention relates to the technical field of corona machine control, in particular to a dynamic balance system and a control method for effective power of a corona machine.

Background

Corona treatment is an electric shock treatment which gives higher adhesion to the surface of the substrate. The principle is that high-frequency high-voltage corona discharge (high-frequency alternating current voltage reaches 5000-.

The traditional corona machine usually adopts one of PFM, PAM and PWM or a combined mode to control the effective power, the power of the corona machine is fixed when the corona machine leaves a factory, the corona machine can reach the required power only by using the corona machine under the same voltage and current states, and the load parameters are frequently changed in the actual use process, so that the output effective power can be changed, the corona machine cannot reach the corresponding power in the working process, and the corona effect and the product quality are influenced.

Disclosure of Invention

The invention aims to provide a dynamic balance system and a control method for effective power of a corona machine, which realize that the effective power output by the corona machine in the working process is always kept at a set power.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a corona machine effective power dynamic balance system, the corona machine in set up controller unit and drive circuit, the controller unit transmits drive signal to drive circuit, drive circuit control corona machine operation the bus-bar of corona machine on set up voltage sensor and current sensor, voltage sensor gather bus voltage signal in real time and transmit to the controller unit, current sensor gather bus current signal in real time and transmit to the controller unit, the controller unit receives voltage signal and current signal and handles back output control signal to drive circuit.

Further specifically, the controller unit adopts a single chip microcomputer, a DSP chip, a CPLD chip or an FPGA chip.

A method for controlling dynamic balance of effective power of corona machine includes such steps as providing a power controller,

s1, reading a prestored resonant frequency value, and adjusting the output PWM duty ratio to a set value;

s2, outputting and operating for a set time according to the current resonant frequency value and the duty ratio, wherein the state to be output is stable;

s3, obtaining an effective power value under the current resonance frequency;

and S4, comparing the effective power value with a preset set power value, if the effective power value is equal to the set power value, directly returning to the step S2 for circulation, and if the effective power value is not equal to the set power value, adjusting the value of the duty ratio and returning to the step S2 for circulation.

More specifically, the range of the prestored resonant frequency value is 10KHz to 50 KHz.

More specifically, the time set in step S2 is in the range of 100us to 5S.

More specifically, the method for obtaining the effective Power value Power in step S3 includes collecting the voltage value Vdc and the current value Idc of the corona bus, and calculating and obtaining the effective Power value Power according to the formula Power ═ Vdc × Idc.

More specifically, in step S4, when the effective power value is not equal to the set power value, it is determined whether the effective power value is greater than the set power value, if so, the step S2 is returned after the duty ratio is decreased according to the set decrease amount, and if not, the step S2 is returned after the duty ratio is increased according to the set increase amount.

More specifically, the set increase amount is the same as the set decrease amount.

More specifically, the set value of the duty ratio in step S1 is 0.

The invention has the beneficial effects that: through the system and the control method, the effective power is compared with the set power at regular intervals in the actual working process, if deviation occurs, the duty ratio is adjusted to correct, so that the effective power in the using process of the corona machine is always in dynamic balance, the corona machine is ensured to be in the optimal corona effect, and the product quality is improved.

Drawings

FIG. 1 is a schematic diagram of a corona machine active power dynamic balancing system of the present invention;

FIG. 2 is a flow chart of a control method for dynamic balancing of corona machine active power in accordance with the present invention;

FIG. 3 is a logic diagram controlled by software in accordance with the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, a corona machine system includes a circuit module located on a corona machine, and a control module for outputting a control signal to the circuit module, wherein the circuit module includes a rectification circuit, a filter circuit, an inversion unit, a transformer, and a discharge load, a single-phase or three-phase ac power is connected to the rectification circuit to convert the ac power into a dc power and input the dc power to the filter circuit, and then the dc power is supplied to the discharge load through the inversion unit and the transformer to perform corona operation, and the corona machine system further includes a driving circuit for sending voltage and current signals to the inversion unit; the control module comprises a controller unit, a display unit, an input unit, an alarm unit, a remote interface and a corresponding signal feedback unit, wherein the display unit, the input unit, the alarm unit, the remote interface and the corresponding signal feedback unit are connected with the controller unit, the input unit is used for inputting corresponding parameters and starting or stopping signals into the controller unit, the display unit displays the working state of the corona machine to an operator through a display screen, the signal feedback unit receives the actual working state of the corona machine and displays the working state through the display unit and alarms through the alarm unit, and the remote interface can realize remote control input and other operations through a network.

Based on the system, in order to ensure that the effective power can be adjusted at any time and the set power is close to, a voltage sensor and a current sensor are arranged on a corona bus, the voltage sensor collects voltage signals of the corona bus, the current sensor collects current signals of the corona bus, the voltage signals and the current signals are transmitted to a controller unit and processed in the controller unit, processed control signals (including resonant frequency and duty ratio) are output to a driving circuit, and the driving circuit outputs control signals to an inverter unit so as to control the working state of a discharging load.

The controller unit adopts a singlechip, a DSP chip, a CPLD chip or an FPGA chip.

Based on the above system, a control method for dynamic balance of effective power of corona machine is provided, which comprises the steps as shown in figure 2,

s1, reading a prestored resonant frequency value, and adjusting the output PWM duty ratio to a set value, wherein the set value can be selected according to needs, the resonant frequency value can be changed according to needs and can be directly set through an input unit, the range of the resonant frequency value is 10KHz-50KHz, and 30KHz is preferred in the scheme;

s2, outputting and operating the set time according to the current resonant frequency value and the duty ratio, wherein the output state is stable, the set time mainly ensures that the corona machine operates stably completely, and the set time range is 100us-5S, preferably 0.2S;

s3, obtaining an effective power value under the current resonance frequency, wherein the effective power value can be obtained by obtaining the voltage value and the bus current value of a corona bus or by collecting the voltage and the current of an alternating current input end;

in the scheme, the current value is calculated by the voltage value Vdc and the current value Idc, and the formula is that the effective Power value Power is equal to Vdc + Idc;

and S4, comparing the effective power value with a preset set power value, if the effective power value is equal to the set power value, directly returning to the step S2 to continue circulation by using the current resonant frequency value and the duty ratio, and if the effective power value is not equal to the set power value, adjusting the value of the duty ratio to return to the step S2 to continue circulation.

When the effective power value is not equal to the set power value, it is necessary to determine whether the effective power value is greater than the set power value, if so, the duty cycle is reduced by the preset set decrement amount, and the step S2 is returned, and the current resonant frequency value and the modified duty cycle are output to continue the cycle; if not, the duty ratio is increased by the preset increment amount, and the process returns to step S2, at this time, the current resonant frequency value and the modified duty ratio output are used to continue the cycle.

The setting decrease amount and the setting increase amount may be the same or different.

The control method can realize automatic adjustment to realize dynamic balance through software, and the specific embodiment shown in fig. 3 is as follows:

the method comprises the following steps that firstly, a corona machine is started, at the moment, a self-checking program in the corona machine is started to carry out self-checking, no protection condition is triggered, and the machine is in a normal running state;

secondly, after the machine is in a normal running state, the controller unit firstly reads a preset resonant frequency value F _ RES from the read-only memory, assigns the resonant frequency value F _ RES to Fout, namely that Fout is equal to F _ RES, and assigns a variable Dout of the current output PWM duty ratio to 0, namely that Dout is equal to 0;

thirdly, the controller unit outputs a driving pulse signal to the driving circuit according to the conditions that Fout is equal to F _ RES and Dout is equal to 0, and the driving circuit controls the discharging load to work;

fourthly, the program waits for a short time, which is 0.2s, and the main purpose is to wait for the corona output to be in a stable state;

fifthly, the voltage sensor acquires the voltage value of the corona bus and converts the analog signal into a digital signal to the controller unit through the analog-to-digital conversion circuit, and the current sensor acquires the current value of the corona bus and converts the analog signal into the digital signal to the controller unit through the analog-to-digital conversion circuit;

sixthly, the controller unit calculates the obtained voltage value Vdc and current value Idc according to a formula Power-Vdc-Idc to obtain the current effective Power;

seventhly, comparing the effective Power with the Power PowerSet set by the display unit, judging whether the Power is equal to the PowerSet, if yes, returning to the third step, and continuing to perform circulation by means of Fout equal to F _ RES and Dout equal to 0; if not, entering the eighth step;

eighthly, judging whether the Power is larger than the PowerSet or not, if so, subtracting a single-STEP variation D _ STEP based on the current duty ratio, assigning the varied duty ratio to Dout, and returning to the third STEP of cyclic operation, namely, the Dout is Dout-D _ STEP; and if the current duty ratio is not the same as the preset duty ratio, increasing a single STEP change amount D _ STEP on the basis of the current duty ratio, assigning the changed duty ratio to Dout, and returning to the third STEP of cycle operation, namely Dout is Dout + D _ STEP.

The software realizes the automatic calculation of the effective power and the comparison between the effective power and the set power, ensures that the effective power of the corona machine is always close to the set power in the use process, and maintains a dynamic balance.

In summary, through the system and the control method, the effective power is compared with the set power at regular intervals in the actual working process, and if deviation occurs, the effective power is corrected by adjusting the duty ratio, so that the effective power in the using process of the corona machine is always in dynamic balance, the corona machine is ensured to be in the optimal corona effect, and the product quality is improved.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.