Electromagnet driving and protection circuit for ATS

Abstract

The utility model relates to electrical engineering field technical field discloses a kind of electromagnet drive and protection circuit for ATS, including charging voltage stabilizing circuit, by diode, energy storage capacitor, voltage stabilizing diode and several high-voltage resistance one, high-voltage resistance two, high-voltage resistance three, high-voltage resistance four, high-voltage resistance five, high-voltage resistance six, high-voltage resistance seven, high-voltage resistance eight are formed, for charging energy storage capacitor and stabilizing output voltage;Protection circuit, by adjusting resistance one, adjusting resistance two, voltage protection capacitor and circuit diode are formed, for preventing the breakdown of sharp peak voltage to electronic device.The utility model is characterized in that stable driving voltage, sharp peak voltage protection, fast and accurate start-stop control and efficient energy release, ensure the reliability and durability of electromagnet in high-frequency switching, meet miniaturization and high-performance demand simultaneously.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical engineering field technical field especially, it relates to a kind of electromagnet drive and protection circuit for ATS. BACKGROUND

[0002] ATS electromagnet refers to a kind of electromagnetic device used in automatic transfer switch (ATS). It is a kind of component that realizes mechanical action by electromagnetic induction principle, and is mainly used to control or drive the switching of ATS internal contact.

[0003] DC electromagnet is generally used in ATS product as the driving part of ontology, compared with AC electromagnet, DC electromagnet is suitable for the occasion that needs frequent switching and reliable work, with small size, fast speed, large current, reliable work, allows higher switching frequency and other characteristics.During driving process, the switching of controller electromagnet current is needed.

[0004] The principle of traditional electromagnet current switching circuit is to use relay to cut off electric arc, and relay bears the functions of arc extinguishing and isolation, so as to realize the maximization of cost and performance. However, since relay is a mechanical device, arc extinguishing function is mainly completed by contact, and in the use scene with strong vibration intensity, vibration may cause relay malfunction, thereby electrifying electromagnet, and causing the problem of relay burning. Especially for some products that need to break large current, the size of relay is uncontrollable, which may cause the rise of cost, and is not suitable for small-size and low-cost products; And relay has fixed attraction and release time, and when there is a forced requirement for ATS conversion time, it cannot meet the use, so an electromagnet drive and protection circuit for ATS is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides an electromagnet drive and protection circuit for ATS, which aims to improve the problem that the existing technology cannot meet the use when there is a forced requirement for ATS conversion time.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An electromagnet drive and protection circuit for ATS, comprising:

[0008] Charging voltage stabilizing circuit, composed of diode, energy storage capacitor, voltage stabilizing diode, and a plurality of high-voltage resistors one, high-voltage resistors two, high-voltage resistors three, high-voltage resistors four, high-voltage resistors five, high-voltage resistors six, high-voltage resistors seven, high-voltage resistors eight, for charging energy storage capacitor and stabilizing output voltage;

[0009] The protection circuit is composed of the first regulating resistor, the second regulating resistor, the voltage protection capacitor and the circuit diode, and is used for preventing the breakdown of the electronic device caused by the sharp peak voltage;

[0010] The driving circuit is composed of the gate driver, the primary control resistor, the first conversion resistor, the second conversion resistor, the coupling capacitor, the insulated gate bipolar transistor and the triode, and is used for controlling the start-stop action of the electromagnet;

[0011] The freewheeling protection circuit comprises the first freewheeling diode, the second freewheeling diode and the anti-inrush diode, and is used for releasing the stored energy in the electromagnet coil and preventing the damage of the IGBT caused by the inductive current mutation;

[0012] As a further description of the above technical solution:

[0013] The charging voltage stabilizing circuit adjusts the charging time of the energy storage capacitor through the combination of the first high-voltage resistor, the second high-voltage resistor, the third high-voltage resistor, the fourth high-voltage resistor, the fifth high-voltage resistor, the sixth high-voltage resistor, the seventh high-voltage resistor and the eighth high-voltage resistor;

[0014] As a further description of the above technical solution:

[0015] The protection circuit effectively suppresses the sharp peak voltage when the IGBT is turned off through the design of the circuit diode, the first regulating resistor and the second regulating resistor, and ensures the working reliability;

[0016] As a further description of the above technical solution:

[0017] The gate driver is isolated from the primary control circuit through the photosensitive diode, and is used for preventing the short circuit or the misoperation caused by the external vibration;

[0018] As a further description of the above technical solution:

[0019] The first freewheeling diode, the second freewheeling diode and the anti-inrush diode of the freewheeling protection circuit are used for consuming the residual energy in the electromagnet coil, and ensuring the safety of the IGBT in the process of turning on and turning off;

[0020] As a further description of the above technical solution:

[0021] The driving circuit adjusts the parameters of the first conversion resistor, the second conversion resistor and the coupling capacitor, and optimizes the switching speed of the gate driver and the IGBT;

[0022] As a further description of the above technical solution:

[0023] The driving circuit comprises the triode, which is used for controlling the turning on and turning off of the gate driver through the current signal, and realizing the accurate control of the electromagnet.

[0024] The utility model has the following beneficial effects:

[0025] In the utility model, through the cooperative design of the charging voltage stabilizing, protection, driving and freewheeling protection, efficient and safe driving of the electromagnet is realized, and the electromagnet has the characteristics of stable driving voltage, peak voltage protection, fast and accurate start-stop control and high energy release, ensures the reliability and durability of the electromagnet in high-frequency switching, and meets the miniaturization and high performance requirements. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of an electromagnet driving and protection circuit for ATS is provided in the utility model.

[0027] LEGEND:

[0028] 1, gate driver;2, high-voltage resistor one;3, high-voltage resistor two;4, high-voltage resistor three;5, high-voltage resistor four;6, high-voltage resistor five;7, high-voltage resistor six;8, high-voltage resistor seven;9, high-voltage resistor eight;10, primary control resistor;11, adjusting resistor one;12, adjusting resistor two;13, conversion resistor one;14, conversion resistor two;15, energy storage capacitor;16, voltage protection capacitor;17, coupling capacitor;18, insulated gate bipolar transistor;19, triode;20, freewheeling diode one;21, anti-inversion diode;22, voltage stabilizing diode;23, freewheeling diode two;24, circuit diode. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, any person skilled in the art can make further modifications without creative efforts, and all the modifications belong to the protection scope of the utility model.

[0030] REFERENCE Figure 1 An embodiment provided by the utility model: an electromagnet driving and protection circuit for ATS, comprising: a charging voltage stabilizing circuit composed of freewheeling diode one 20, energy storage capacitor 15, voltage stabilizing diode 22 and high-voltage resistor one 2, high-voltage resistor two 3, high-voltage resistor three 4, high-voltage resistor four 5, high-voltage resistor five 6, high-voltage resistor six 7, high-voltage resistor seven 8 and high-voltage resistor eight 9, used for charging the energy storage capacitor 15 and stabilizing the output voltage;This ensures that the electromagnet can obtain constant driving voltage when running, thereby improving the action stability and reliability.

[0031] The protection circuit is composed of regulating resistor 11, regulating resistor 12, voltage protection capacitor 16 and circuit diode 24, which is used to prevent the breakdown of electronic devices caused by sharp voltage. This effectively reduces the loss of IGBT, prolongs the service life of the circuit and enhances the anti-interference ability.

[0032] The drive circuit is composed of gate driver 1, primary control resistor 10, conversion resistor 13, conversion resistor 14, coupling capacitor 17, insulated gate bipolar transistor 18 and transistor 19, which is used to control the start-stop action of electromagnet. By optimizing the gate drive signal, the response speed of electromagnet can be greatly improved to achieve precise control.

[0033] The freewheeling protection circuit includes freewheeling diode 20, freewheeling diode 23 and anti-inrush diode 21, which is used to release the energy stored in the electromagnet coil. This prevents damage caused by inductive current surge when IGBT is closed, further improving the safety of the drive circuit.

[0034] The charging voltage stabilizing circuit adjusts the charging time of energy storage capacitor 15 through the combination of several high-voltage resistors 2-9. This design can flexibly adjust the charging rate according to the needs to adapt to different application scenarios.

[0035] The protection circuit effectively suppresses the sharp voltage when IGBT is closed through the design of circuit diode 24 and regulating resistor 11, regulating resistor 12. This ensures the stability of the circuit under high-frequency operation and prevents the risk of electronic device breakdown caused by voltage transient.

[0036] The gate driver 1 is isolated from the primary control circuit by a photosensitive diode, which is used to prevent short circuit or misoperation caused by external vibration. This isolation measure improves the anti-interference ability of the system and ensures the reliability of long-time operation.

[0037] The freewheeling diode 20, freewheeling diode 23 and anti-inrush diode 21 in the freewheeling protection circuit work together to consume the residual energy in the electromagnet coil. This design avoids damage caused by reverse current when IGBT is closed, improving the safety margin of the circuit.

[0038] The drive circuit optimizes the switching speed of the gate driver 1 and IGBT by adjusting the parameters of the conversion resistor 13, conversion resistor 14 and coupling capacitor 17. This optimization significantly reduces energy loss and enhances the accuracy and sensitivity of electromagnet action.

[0039] The transistor 19 in the drive circuit controls the conduction and shutdown of the gate driver 1 through current signal control, realizing precise control of the electromagnet. This control mechanism improves the adaptability of the drive circuit to the load and meets the use requirements under different working conditions.

[0040] Working principle: First, the charging voltage stabilizing circuit is composed of freewheeling diode one 20, energy storage capacitor 15, voltage stabilizing diode 22, high voltage resistor one 2, high voltage resistor two 3, high voltage resistor three 4, high voltage resistor four 5, high voltage resistor five 6, high voltage resistor six 7, high voltage resistor seven 8 and high voltage resistor eight 9. This part adjusts the charging time of the energy storage capacitor 15 by adjusting the combination of high voltage resistors, thereby providing a continuous and stable driving voltage for the electromagnet. This stable voltage output ensures that the electromagnet operates reliably at high frequency, avoiding the impact of voltage fluctuations on system performance.

[0041] The protection circuit is composed of regulating resistor one 11, regulating resistor two 12, voltage protection capacitor 16 and circuit diode 24, and its main function is to suppress the damage of sharp peak voltage to IGBT. When IGBT is off, high amplitude sharp peak voltage may occur in the circuit, which can be significantly reduced by the protection circuit to absorb and disperse the voltage, thereby prolonging the service life of the equipment and enhancing the overall stability of the circuit.

[0042] The driving circuit is composed of gate driver 1, primary control resistor 10, conversion resistor one 13, conversion resistor two 14, coupling capacitor 17, insulated gate bipolar transistor 18 and control triode 19, which is mainly used for start-stop control of the electromagnet. The gate driver 1 realizes isolation design with the primary control circuit through the photosensitive diode, effectively preventing short circuit and misoperation caused by external vibration. At the same time, by adjusting the parameters of conversion resistor one 13 and conversion resistor two 14 and coupling capacitor 17, the switching speed of the gate drive signal is optimized. Triode 19 further enhances the control accuracy of the drive signal, ensuring the response speed and accuracy of the electromagnet action.

[0043] The freewheeling protection circuit is composed of freewheeling diode one 20, freewheeling diode two 23 and anti-inrush diode 21, which is used to dissipate the excess energy stored in the electromagnet coil. When IGBT is off, the remaining current in the inductor is released through the freewheeling protection circuit, avoiding damage to IGBT caused by sudden current. This design greatly improves the safety and reliability of the circuit, ensuring the stable operation of the electromagnet in high-frequency switching.

[0044] Through the coordinated work of the charging voltage stabilizing, protection, driving and freewheeling protection circuits, this circuit can realize efficient and safe driving of the electromagnet, while meeting the needs of different working scenarios, providing technical support for the miniaturization and high performance of the system.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An electromagnetic drive and protection circuit for an ATS, characterized by, The application relates to a charging voltage stabilizing circuit, a protection circuit, a driving circuit and a freewheeling protection circuit. The charging voltage stabilizing circuit is composed of a diode (20), an energy storage capacitor (15), a voltage stabilizing diode (22) and a plurality of high-voltage resistors (2, 3, 4, 5, 6, 7, 8, 9) and is used for charging the energy storage capacitor (15) and stabilizing output voltage. The protection circuit is composed of an adjusting resistor (11), an adjusting resistor (12), a voltage protection capacitor (16) and a circuit diode (24) and is used for preventing breakdown of electronic devices caused by sharp peak voltage. The driving circuit is composed of a gate driver (1), a primary control resistor (10), a conversion resistor (13), a conversion resistor (14), a coupling capacitor (17), an insulated gate bipolar transistor (18) and a triode (19) and is used for controlling start-stop actions of an electromagnet. The freewheeling protection circuit is composed of a freewheeling diode (20), a freewheeling diode (23) and an anti-backflow diode (21) and is used for releasing energy stored in a coil of the electromagnet and preventing damage of an IGBT caused by sudden change of inductive current.

2. The circuit of claim 1, wherein, The charging voltage stabilizing circuit adjusts charging time of the energy storage capacitor (15) through combination of the plurality of high-voltage resistors (2, 3, 4, 5, 6, 7, 8, 9).

3. The circuit of claim 1 or 2, characterized in that, The protection circuit effectively suppresses sharp peak voltage when the IGBT is turned off through design of the circuit diode (24), the adjusting resistor (11) and the adjusting resistor (12) and guarantees working reliability.

4. The circuit of claim 1, wherein, The gate driver (1) is isolated from the primary control circuit through a photosensitive diode and is used for preventing short circuit or misoperation caused by external vibration.

5. The circuit of claim 1, wherein, The freewheeling diode (20), the freewheeling diode (23) and the anti-backflow diode (21) of the freewheeling protection circuit are used for consuming residual energy in the coil of the electromagnet and guaranteeing safety of the IGBT in the process of turning on and turning off.

6. The circuit of claim 1, wherein, The driving circuit optimizes switching speed of the gate driver (1) and the IGBT by adjusting parameters of the conversion resistor (13), the conversion resistor (14) and the coupling capacitor (17).

7. The circuit of claim 1, wherein, The driving circuit includes the triode (19) and is used for controlling turning on and turning off of the gate driver (1) through a current signal and realizing accurate control of the electromagnet.

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