High-frequency pulse electromagnetic valve control circuit

Abstract

The utility model discloses a high-frequency pulse electromagnetic valve control circuit, and belongs to the field of electromagnetic valves. Comprising a power supply processing module, a main control module, a signal conversion module, a load driving module and a power control module, the power supply processing module, the main control module, the signal conversion module, the load driving module and the power control module are connected in sequence, and the signal conversion module, the load driving module and the power control module are connected with the power supply processing module; and the power control module is electrically connected with the main control module. The power supply processing module processes an input power supply signal, filters out an interference signal and then supplies the processed power supply signal to the main control module, the signal conversion module and the load driving module; after the master control module generates high-frequency PWM electric pulse signals, high-low level conversion is achieved through the signal conversion module, then the signals are output to a coil of the electromagnetic valve, a magnetic field is generated after the coil is powered on, a valve element is controlled to act, and opening and closing of the electromagnetic valve are achieved. Therefore, the high-frequency PWM electric pulse signals can be stably output, and stable control over the air source is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electromagnetic valve, especially relates to a high frequency pulse electromagnetic valve control circuit. BACKGROUND

[0002] Hot melt adhesive, polyurethane glue, epoxy resin and other fluids need to use glue spraying valve when spraying, to ensure that the glue can be evenly and accurately coated on the required surface. The viscosity and characteristics of these fluids require that the spraying equipment have good performance. A considerable part of the existing glue spraying valves are pneumatic valves. This pneumatic valve is driven by gas pressure, usually uses compressed air as a power source, and relies on the change of gas pressure to realize the opening and closing of the valve body, thereby controlling the spraying and flow of glue.

[0003] However, to achieve stable spraying of fluids, especially in high-precision and high-frequency applications, relying solely on the gas source adjustment of the pneumatic valve is not enough. Stable gas source control not only relates to the spraying effect, but also directly affects production efficiency and product quality. Therefore, the gas source of the pneumatic valve must be stably controlled to ensure that each spraying can achieve the expected effect.

[0004] As a common and effective gas source control device, the electromagnetic valve has the advantages of fast response speed and high control precision, and has been widely applied in many fields. If it is applied to the pneumatic valve, the overall performance of the spraying system can be significantly improved. However, how to design the control circuit of the electromagnetic valve so that it can stably output high-frequency electric pulse signals to control the gas source of the pneumatic valve is a technical problem that needs to be solved in the prior art. CONTENT OF THE UTILITY MODEL

[0005] To solve the above problems, the purpose of the utility model is to provide a high-frequency pulse electromagnetic valve control circuit which can stably output high-frequency electric pulse signals and realize stable control of the gas source.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] The utility model provides a high-frequency pulse electromagnetic valve control circuit, comprising:

[0008] A power processing module processes the input power signal;

[0009] A main control module is used for outputting high-frequency PWM electric pulse signals;

[0010] A signal conversion module is used for conversion between positive and negative levels of high-frequency PWM electric pulse signals;

[0011] A load driving module is used for controlling the magnetic field of the coil and driving the valve body of the electromagnetic valve to work;

[0012] a power control module for controlling the power of the PWM electric pulse signal;

[0013] The power supply processing module, the main control module, the signal conversion module, the load driving module and the power control module are sequentially connected, and the signal conversion module, the load driving module and the power control module are connected with the power supply processing module; the power control module is electrically connected with the main control module.

[0014] Further, the power supply processing module comprises a diode DB, an inductor L1, a triode Q1 and a triode Q2, the diode DB, the triode Q1 and the triode Q2 are connected with an externally inputted direct current power signal, the main control module and the inductor L1 are electrically connected with the diode DB, the triode Q1 and the triode Q2 are connected in parallel with the diode DB, and the signal conversion module and the power control module are electrically connected with the inductor L1, the triode Q1 is electrically connected with the power control module, and the triode Q2 is electrically connected with the load driving module.

[0015] Further, the main control module comprises a main control chip U3 and a filter capacitor C1, the filter capacitor C1 is connected with an externally inputted direct current power signal, and the main control chip U3 is electrically connected with the diode DB through the filter capacitor C1; the signal conversion module and the power control module are electrically connected with the main control chip U3. The filter capacitor C1 can filter the external direct current voltage signal and provide it for the main control chip U3, the main control chip U3 adopts a PWM chip, outputs a high-frequency PWM electric pulse signal to the signal conversion module for level conversion, and provides it for the subsequent load driving module.

[0016] Further, the main control chip U3 is a TL5001C produced by Texas Instruments.

[0017] Further, the signal conversion module comprises a compound triode U1, which is electrically connected with the main control chip U3, the inductor L1 and the load driving module. After receiving the high-frequency PWM electric pulse signal outputted by the main control chip U3, the compound triode U1 performs level conversion and provides it for the subsequent load driving module.

[0018] Further, the load driving module comprises a load driving chip U2, an inductor L2, a resistor R6, a voltage stabilizing diode D5 and a voltage stabilizing diode D6, the load driving chip U2 is electrically connected with the compound triode U1, the inductor L2, the voltage stabilizing diode D5 and the voltage stabilizing diode D6 are electrically connected with the load driving chip U2, the resistor R6 and the power control module are electrically connected with the inductor L2, and the load driving chip U2 is electrically connected with the triode Q2.

[0019] Further, the load driving chip U2 is FDS4559 of ONSEMI.

[0020] Further, the power control module comprises a power control chip U4, and the power control chip U4 is electrically connected with the inductor L1, the main control chip U3, the resistor R6, the inductor L2 and the triode Q1. After the resistor R6 collects the working power of the load driving module, the working power is fed back to the power control chip U4, the power control chip U4 compares the working power with the preset power, and the comparison result is fed back to the main control chip U3, and the main control chip U3 adjusts the output power of the PWM signal.

[0021] Further, the power control chip U4 is TS321ILT of SEMICONDUCTOR.

[0022] Compared with the prior art, the power processing module of the utility model filters out interference signals after processing the input power signal, and provides the main control module, the signal conversion module and the load driving module; after the main control module generates a high-frequency PWM electric pulse signal, the high-low level conversion is realized through the signal conversion module, and then the signal is output to the coil of the electromagnetic valve; the coil generates a magnetic field after being electrified, the valve core is controlled to act, and the opening and closing of the electromagnetic valve are realized; after the power control module obtains the output power of the load driving module, the output power is compared with the preset power, and the comparison result is fed back to the main control module; the main control module adjusts the output power of the PWM signal, so that the high-frequency PWM electric pulse signal can be stably output, and the stable control of the gas source is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the circuit principle drawing of the power processing module.

[0024] Figure 2 is the circuit principle drawing of the power processing module.

[0025] Figure 3 is the circuit principle drawing of the main control module.

[0026] Figure 4 is the circuit principle drawing of the signal conversion module.

[0027] Figure 5 is the circuit principle drawing of the load driving module.

[0028] Figure 6 is the circuit principle drawing of the power control module. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.

[0030] To realize above-mentioned purpose, the technical scheme of the utility model is as follows:

[0031] Referring to Figure 1 The embodiment provides a high-frequency pulse solenoid valve control circuit, which comprises:

[0032] A power processing module processes the input power signal;

[0033] A main control module is used for outputting a high-frequency PWM electric pulse signal;

[0034] A signal conversion module is used for conversion between positive and negative levels of the high-frequency PWM electric pulse signal;

[0035] A load driving module is used for controlling the magnetic field of the coil and driving the valve body of the solenoid valve to work;

[0036] A power control module is used for controlling the power of the PWM electric pulse signal;

[0037] The power processing module, the main control module, the signal conversion module, the load driving module and the power control module are sequentially connected, and the signal conversion module, the load driving module and the power control module are connected with the power processing module; the power control module is electrically connected with the main control module.

[0038] In the embodiment, the power processing module processes the input power signal, filters out interference signals and provides the main control module, the signal conversion module and the load driving module; after the main control module generates the high-frequency PWM electric pulse signal, the high-low level conversion is realized through the signal conversion module, and then the signal is output to the coil of the solenoid valve; the coil generates a magnetic field after being electrified, controls the valve core to act and realizes the opening and closing of the solenoid valve; after the power control module obtains the output power of the load driving module, the output power is compared with the preset power, and the comparison result is fed back to the main control module; the main control module adjusts the output power of the PWM signal, so that the high-frequency PWM electric pulse signal can be stably output, and the stable control of the gas source can be realized.

[0039] Further, referring to Figure 2The power processing module comprises a diode DB, an inductor L1, a triode Q1 and a triode Q2, the diode DB, the triode Q1 and the triode Q2 are connected to an externally inputted direct current power signal, the main control module and the inductor L1 are electrically connected to the diode DB, the triode Q1 and the triode Q2 are connected in parallel to the diode DB, the signal conversion module and the power control module are electrically connected to the inductor L1, the triode Q1 is electrically connected to the power control module, and the triode Q2 is electrically connected to the load driving module.

[0040] In the embodiment, an externally inputted 24V direct current voltage signal is directly supplied to the main control module for power supply, and another part of the signal is inputted to the diode DB for rectification, and the inductor L1 is used after filtering and energy storage, the signal conversion module and the power control module.

[0041] Further, referring to Figure 3 The main control module comprises a main control chip U3 and a filter capacitor C1, the filter capacitor C1 is connected to an externally inputted direct current power signal, and the main control chip U3 is electrically connected to the diode DB through the filter capacitor C1; the signal conversion module and the power control module are electrically connected to the main control chip U3.

[0042] Further, the main control chip U3 is a TL5001C produced by Texas Instruments.

[0043] Further, referring to Figure 4 The signal conversion module comprises a compound triode U1, which is electrically connected to the main control chip U3, the inductor L1 and the load driving module.

[0044] Further, referring to Figure 5 The load driving module comprises a load driving chip U2, an inductor L2, a resistor R6, a voltage stabilizing diode D5 and a voltage stabilizing diode D6, the load driving chip U2 is electrically connected to the compound triode U1, the inductor L2, the voltage stabilizing diode D5 and the voltage stabilizing diode D6 are electrically connected to the load driving chip U2, the resistor R6 and the power control module are electrically connected to the inductor L2, and the load driving chip U2 is electrically connected to the triode Q2.

[0045] Further, the load driving chip U2 is a FDS4559 produced by On-Semiconductor.

[0046] In the embodiment, after the load driving chip U2 receives the high-frequency PWM electric pulse signal converted by the composite triode U1, the high-speed on or off electric pulse signal of the auxiliary L2 can be controlled to control the magnetic field of the inductor coil and drive the valve body of the electromagnetic valve to work. When the inductor L2 is powered off, the composite triode U1, the load driving chip U2, the voltage stabilizing diode D5 and the voltage stabilizing diode D6 can quickly absorb the induced electromotive force after the inductor L2 loses the electric signal, so that the valve core can be quickly reset by elasticity; the triode Q2 can monitor whether there is a power input in the load driving module.

[0047] Further, referring to Figure 6 , the power control module comprises a power control chip U4, and the power control chip U4 is electrically connected with the inductor L1, the main control chip U3, the resistor R6, the inductor L2 and the triode Q1. After the resistor R6 collects the working power of the load driving module, the working power is fed back to the power control chip U4, the power control chip U4 compares the working power with the preset power, and the comparison result is fed back to the main control chip U3, and the main control chip U3 adjusts the output power of the PWM signal.

[0048] Further, the model of the power control chip U4 is TS321ILT, and the manufacturer is STMicroelectronics.

[0049] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-frequency pulse solenoid valve control circuit, characterized in that: include: The power processing module processes the input power signal; Main control module, used to output high-frequency PWM electrical pulse signals; Signal conversion module, used for conversion between positive and negative levels of high-frequency PWM electrical pulse signals; The load driving module is used to control the magnetic field of the coil and drive the valve body of the solenoid valve to work; A power control module, used to control the power of the PWM electrical pulse signal; The power processing module, main control module, signal conversion module, load driving module, and power control module are connected in sequence. The signal conversion module, load driving module, and power control module are connected to the power processing module; and the power control module is electrically connected to the main control module.

2. A high-frequency pulse solenoid valve control circuit as claimed in claim 1, characterized in that: The power processing module includes a diode DB, an inductor L1, a transistor Q1, and a transistor Q2. The diode DB, transistor Q1, and transistor Q2 are all connected to an external DC power signal. The main control module and the inductor L1 are electrically connected to the diode DB. The transistor Q1 and transistor Q2 are connected to the diode DB in parallel. The signal conversion module and the power control module are both electrically connected to the inductor L1. The transistor Q1 is electrically connected to the power control module, and the transistor Q2 is electrically connected to the load driving module.

3. A high-frequency pulse solenoid valve control circuit as claimed in claim 2, characterized in that: The main control module includes a main control chip U3 and a filter capacitor C1. The filter capacitor C1 is connected to an external DC power signal, and the main control chip U3 is electrically connected to the diode DB through the filter capacitor C1. The signal conversion module and the power control module are electrically connected to the main control chip U3.

4. A high-frequency pulse solenoid valve control circuit as claimed in claim 3, characterized in that: The model of the main control chip U3 is TL5001C.

5. A high-frequency pulse solenoid valve control circuit as claimed in claim 3, characterized in that: The signal conversion module includes a composite triode U1 , and the composite triode U1 is electrically connected to the main control chip U3 , the inductor L1 , and the load driving module.

6. A high-frequency pulse electromagnetic valve control circuit as claimed in claim 5, characterized in that: The load driving module includes a load driving chip U2, an inductor L2, a resistor R6, a Zener diode D5, and a Zener diode D6. The load driving chip U2 is electrically connected to the composite transistor U1, the inductor L2, the Zener diode D5, and the Zener diode D6 are all electrically connected to the load driving chip U2, the resistor R6 and the power control module are electrically connected to the inductor L2, and the load driving chip U2 is electrically connected to the transistor Q2.

7. A high-frequency pulse electromagnetic valve control circuit as claimed in claim 6, characterized in that: The model of the load driver chip U2 is FDS4559.

8. A high-frequency pulse electromagnetic valve control circuit as claimed in claim 6, characterized in that: The power control module includes a power control chip U4 , which is electrically connected to the inductor L1 , the main control chip U3 , the resistor R6 , the inductor L2 , and the transistor Q1 .

9. A high-frequency pulse electromagnetic valve control circuit as claimed in claim 8, characterized in that: The model of the power control chip U4 is TS321ILT.

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