Control system of electromagnet electric leakage detection device

Abstract

The invention discloses an electromagnet electric leakage detection device control system which comprises a 220V-to-12V circuit, a 12V-to-36V booster circuit, a 12V-to-5V step-down circuit, a 5V-to-3.3 V step-down circuit, a voltage detection circuit, a coil current detection circuit, a main controller, an H-bridge drive circuit, a program control amplification circuit, a buzzer circuit, an indicator lamp circuit and a pressure detection circuit. And the 220V-to-12V circuit is electrically connected with the 12V-to-36V booster circuit and the 12V-to-5V step-down circuit at the same time. Voltage is applied between the electromagnet coil and the electromagnet shell, the leakage current value is detected in real time, and when the leakage current value exceeds a set range value, sound-light alarm is performed, so that the problems of electromagnet turn-to-turn short circuit and electric leakage of the electromagnet coil and the electromagnet shell can be effectively detected, and the probability that unqualified products flow out is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnet leakage detection, in particular to a control system of an electromagnet leakage detection device. Background Art

[0002] Electromagnets are widely used electromagnetic conversion devices in daily life, and are commonly used in relays, electromagnetic brakes, electric door locks and other applications that use electricity to control magnetism. During the production process of electromagnets, short circuits between turns and short circuits between the coil and the shell are prone to occur, resulting in excessive leakage current of the electromagnet, which in turn affects product performance and even causes product failure.

[0003] In order to solve the problem that the leakage problem generated in the electromagnet production process is difficult to detect from the appearance, resulting in the outflow of unqualified products, we designed an electromagnet leakage detection device control system. Summary of the invention

[0004] The object of the present invention is to provide a control system for an electromagnet leakage detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a control system for an electromagnet leakage detection device, comprising a 220V to 12V circuit, a 12V to 36V boost circuit, a 12V to 5V step-down circuit, a 5V to 3.3V step-down circuit, a voltage detection circuit, a coil current detection circuit, a main controller, an H-bridge drive circuit, a programmable amplifier circuit, a buzzer circuit, an indicator light circuit and a pressure detection circuit, wherein the 220V to 12V circuit is electrically connected to the 12V to 36V boost circuit and the 12V to 5V step-down circuit, and the 12V The 12V to 36V boost circuit is electrically connected to the power supply end of the electromagnet coil, the 12V to 36V boost circuit is electrically connected to the voltage detection circuit, the 12V to 5V step-down circuit is electrically connected to the 5V to 3.3V step-down circuit, the 5V to 3.3V step-down circuit is electrically connected to the main controller, the main controller is electrically connected to the coil current detection circuit through the H-bridge drive circuit, the main controller is also electrically connected to the programmable amplifier circuit, the buzzer circuit, the indicator light circuit and the pressure detection circuit, and the programmable amplifier circuit is also electrically connected to the leakage current detection circuit.

[0006] Preferably, the 220V to 12V circuit is used to convert 220V AC power into 12V DC power, and the 12V DC power converted by the 220V to 12V circuit is used to power a 12V to 36V boost circuit and a 12V to 5V buck circuit. The 12V to 36V boost circuit uses an MT3608 chip to convert 12V DC power into 36V DC power, and the 36V DC power converted by the 12V to 36V boost circuit is used to power the electromagnet coil and the voltage detection circuit. The 12V to 5V buck circuit uses an MT2492 chip to convert 12V DC power into 5V DC power, which is used to power a 5V to 3.3V buck circuit. The 5V to 3.3V buck circuit uses an MT2492 chip to convert 5V DC power into 3.3V DC power, which is used to power a main controller.

[0007] Preferably, the voltage detection circuit is used to detect the power supply voltage in real time. When the voltage detection circuit detects that the input voltage is lower than 10V or the input voltage is higher than 14V, it controls the buzzer circuit and the indicator light circuit through the main controller to make sound and light alarms to prevent the electromagnet from being burned by overvoltage. When the voltage detection circuit detects that the input voltage is between 10V and 14V, the voltage detection circuit enables the 12V to 36V boost circuit through the main controller to boost the voltage to 36V. Under the premise of ensuring the personal safety voltage, the voltage is increased as much as possible, thereby amplifying the potential leakage current and increasing the detection reliability.

[0008] Preferably, the H-bridge driving circuit is composed of 4 NMOS tubes and an IR2103 chip, and can control the H-bridge to output a ±12V voltage.

[0009] Preferably, the leakage current detection circuit is used to connect the electromagnet coil, the electromagnet housing, the sampling resistor and the NMOS tube in series to a 12V to 36V boost circuit. When the NMOS tube is turned on, the voltage between the electromagnet coil and the electromagnet housing is 36V, and the leakage current generates a voltage on the sampling resistor. The leakage current detection circuit detects the leakage current between the electromagnet coil and the electromagnet housing by collecting the voltage across the sampling resistor. When the result of the main controller processing is that the leakage current exceeds the set range value, the main controller controls the buzzer circuit and the indicator light circuit to sound and light alarm.

[0010] Preferably, the leakage current detection circuit amplifies the collected leakage current through a programmable amplifier circuit, and the programmable amplifier circuit sends the amplified leakage current to the main controller for processing.

[0011] Preferably, the pressure detection circuit is composed of a ceramic strain gauge pressure sensor. When the electromagnet is energized, the pressure detection circuit will generate a certain pressure on the ceramic strain gauge pressure sensor. The ceramic strain gauge pressure sensor linearly converts the pressure into a voltage value. The main controller evaluates the electromagnet suction force through the voltage value collected by the pressure sensor.

[0012] Preferably, the coil current detection circuit is used to detect the current in the electromagnetic coil and send the detection result to the main controller for processing.

[0013] Compared with the prior art, the present invention applies voltage between the electromagnet coil and the electromagnet casing and detects the leakage current value in real time. When the leakage current value exceeds the set range, an audible and visual alarm is issued. This can effectively detect the short circuit between the electromagnet turns and the leakage of the electromagnet coil and the electromagnet casing, greatly reducing the probability of unqualified products flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a system connection block diagram of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1As shown, the present embodiment proposes a control system for an electromagnet leakage detection device, including a 220V to 12V circuit, a 12V to 36V boost circuit, a 12V to 5V step-down circuit, a 5V to 3.3V step-down circuit, a voltage detection circuit, a coil current detection circuit, a main controller, an H-bridge drive circuit, a program-controlled amplifier circuit, a buzzer circuit, an indicator light circuit and a pressure detection circuit. The 220V to 12V circuit is electrically coupled with the 12V to 36V boost circuit and the 12V to 5V step-down circuit at the same time. The 12V to 36V boost circuit is electrically connected to the power supply end of the electromagnet coil, the 12V to 36V boost circuit is electrically connected to the voltage detection circuit, the 12V to 5V step-down circuit is electrically connected to the 5V to 3.3V step-down circuit, the 5V to 3.3V step-down circuit is electrically connected to the main controller, the 220V to 12V circuit is used to convert 220V AC power into 12V DC power, and the 12V DC power converted by the 220V to 12V circuit is used to power the 12V to 36V boost circuit. The 12V to 36V boost circuit and the 12V to 5V step-down circuit are used for power supply. The 12V to 36V boost circuit uses the MT3608 chip to convert the 12V DC into 36V DC. The 36V DC converted by the 12V to 36V boost circuit is used to power the electromagnet coil and the voltage detection circuit. The 12V to 5V step-down circuit uses the MT2492 chip to convert the 12V DC into 5V DC, which is used to power the 5V to 3.3V step-down circuit. The 5V to 3.3V step-down circuit uses the MT2492 chip to convert the 5V DC into 3.3V DC, which is used to power the main controller. The main controller is electrically connected to the coil current detection circuit through the H-bridge drive circuit. The H-bridge drive circuit is composed of 4 NMOS tubes and an IR2103 chip, which can control the H-bridge to output ±12V voltage. The main controller is also electrically connected to the program-controlled amplifier circuit, the buzzer circuit, the indicator light circuit and the pressure detection circuit. The program-controlled amplifier circuit is also electrically connected to the leakage current detection circuit. The voltage detection circuit is used to detect the power supply voltage in real time. When the voltage detection circuit detects that the input voltage is lower than 10V or higher than 14V, it controls the buzzer circuit and the indicator light circuit through the main controller to give an audible and visual alarm to prevent the electromagnet from being burned by overvoltage. When the voltage detection circuit detects that the input voltage is between 10V and 14V, the voltage detection circuit activates the 12V to 36V boost circuit through the main controller to boost the voltage to 36V. Under the premise of ensuring the personal safety voltage, the voltage is increased as much as possible, thereby amplifying the potential leakage current and increasing the detection reliability. The leakage current detection circuit is used to connect the electromagnet coil, the electromagnet shell, the sampling resistor and the NMOS tube in a series connection mode to a 12V to 36V boost circuit. When the NMOS tube is turned on, the voltage between the electromagnet coil and the electromagnet shell is 36V, and the leakage current generates a voltage on the sampling resistor. The leakage current detection circuit detects the leakage current between the electromagnet coil and the electromagnet shell by collecting the voltage across the sampling resistor. The leakage current detection circuit amplifies the collected leakage current through a program-controlled amplifier circuit. The program-controlled amplifier circuit sends the amplified leakage current to a main controller for processing. When the result of the main controller processing is that the leakage current exceeds a set range value, the main controller controls the buzzer circuit and the indicator light circuit to give an audible and visual alarm. The present invention applies a voltage between the electromagnet coil and the electromagnet shell and detects the leakage current value in real time. When the leakage current value exceeds the set range value, an audible and visual alarm is given, so that the short circuit between the electromagnet turns and the leakage of the electromagnet coil and the electromagnet shell can be effectively detected, and the probability of unqualified products flowing out can be greatly reduced.

[0017] Furthermore, the pressure detection circuit is composed of a ceramic strain gauge pressure sensor. When the electromagnet is energized, the pressure detection circuit will generate a certain pressure on the ceramic strain gauge pressure sensor. The ceramic strain gauge pressure sensor linearly converts the pressure into a voltage value. The main controller evaluates the electromagnet suction force through the voltage value collected by the pressure sensor. The coil current detection circuit is used to detect the current in the electromagnetic coil and send the detection result to the main controller for processing.

[0018] The method of using this embodiment is as follows: the 12V direct current converted by the 220V to 12V circuit supplies power to the 12V to 36V boost circuit and the 12V to 5V step-down circuit; the 36V direct current converted by the 12V to 36V boost circuit supplies power to the electromagnet coil and the voltage detection circuit; the 12V to 5V step-down circuit supplies power to the 5V to 3.3V step-down circuit; the 5V to 3.3V step-down circuit supplies power to the main controller; when the voltage detection circuit detects that the input voltage is lower than 10V or higher than 14V, the voltage detection circuit controls the buzzer circuit and the indicator light circuit through the main controller to give an audible and visual alarm to prevent the electromagnet from being burned by overvoltage; when the voltage detection circuit detects that the input voltage is between 10V and 14V, the voltage detection circuit activates the 12V to 36V boost circuit through the main controller to boost the voltage to 36V. Under the premise of ensuring the personal safety voltage, the voltage is increased as much as possible, thereby reducing the potential leakage. The leakage current is amplified to increase the detection reliability; at the same time, the leakage current detection circuit is used to connect the electromagnet coil, the electromagnet shell, the sampling resistor and the NMOS tube in series connection to the 12V to 36V boost circuit. When the NMOS tube is turned on, the voltage between the electromagnet coil and the electromagnet shell is 36V, and the leakage current generates a voltage on the sampling resistor. The leakage current detection circuit detects the leakage current between the electromagnet coil and the electromagnet shell by collecting the voltage across the sampling resistor. The leakage current detection circuit amplifies the collected leakage current through the program-controlled amplifier circuit, and the program-controlled amplifier circuit sends the amplified leakage current to the main controller for processing. When the result of the main controller processing is that the leakage current exceeds the set range value, the main controller controls the buzzer circuit and the indicator light circuit to sound and light alarm, so as to effectively detect the short circuit between the electromagnet turns and the leakage of the electromagnet coil and the electromagnet shell, thereby greatly reducing the probability of unqualified products flowing out.

[0019] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control system for an electromagnet leakage detection device, comprising a 220V to 12V circuit, a 12V to 36V boost circuit, a 12V to 5V step-down circuit, a 5V to 3.3V step-down circuit, a voltage detection circuit, a coil current detection circuit, a main controller, an H-bridge drive circuit, a program-controlled amplifier circuit, a buzzer circuit, an indicator light circuit and a pressure detection circuit, characterized in that: The 220V to 12V circuit is electrically connected to the 12V to 36V boost circuit and the 12V to 5V buck circuit at the same time. The 12V to 36V boost circuit is electrically connected to the power supply end of the electromagnet coil. The 12V to 36V boost circuit is also electrically connected to the voltage detection circuit. The 12V to 5V buck circuit is electrically connected to the 5V to 3.3V buck circuit. The 5V to 3.3V buck circuit is electrically connected to the main controller. The main controller is electrically connected to the coil current detection circuit through the H-bridge drive circuit. The main controller is also electrically connected to the programmable amplifier circuit, the buzzer circuit, the indicator light circuit and the pressure detection circuit. The programmable amplifier circuit is also electrically connected to the leakage current detection circuit.

2. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The 220V to 12V circuit is used to convert 220V AC power into 12V DC power. The 12V DC power converted by the 220V to 12V circuit is used to power the 12V to 36V boost circuit and the 12V to 5V buck circuit. The 12V to 36V boost circuit uses the MT3608 chip to convert 12V DC power into 36V DC power. The 36V DC power converted by the 12V to 36V boost circuit is used to power the electromagnet coil and the voltage detection circuit. The 12V to 5V buck circuit uses the MT2492 chip to convert 12V DC power into 5V DC power, which is used to power the 5V to 3.3V buck circuit. The 5V to 3.3V buck circuit uses the MT2492 chip to convert 5V DC power into 3.3V DC power, which is used to power the main controller.

3. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The voltage detection circuit is used to detect the power supply voltage in real time. When the voltage detection circuit detects that the input voltage is lower than 10V or higher than 14V, it controls the buzzer circuit and the indicator light circuit through the main controller to give an audible and visual alarm to prevent the electromagnet from being burned by overvoltage. When the voltage detection circuit detects that the input voltage is between 10V and 14V, the voltage detection circuit enables the 12V to 36V boost circuit through the main controller.

4. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The H-bridge driving circuit is composed of 4 NMOS tubes and an IR2103 chip.

5. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The leakage current detection circuit is used to connect the electromagnet coil, the electromagnet housing, the sampling resistor and the NMOS tube in series to the 12V to 36V boost circuit. The leakage current detection circuit detects the leakage current between the electromagnet coil and the electromagnet housing by collecting the voltage across the sampling resistor.

6. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The leakage current detection circuit amplifies the collected leakage current through the program-controlled amplifier circuit, and the program-controlled amplifier circuit sends the amplified leakage current to the main controller for processing.

7. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The pressure detection circuit is composed of a ceramic strain gauge pressure sensor.

8. The control system of an electromagnet leakage detection device according to claim 1, characterized in that: The coil current detection circuit is used to detect the current in the electromagnetic coil and send the detection result to the main controller for processing.

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