Protection circuit for eliminating reverse voltage and current impact, power supply and magnetic stimulation device

Abstract

The utility model discloses a protection circuit for eliminating reverse voltage and current impact, a power supply and a magnetic stimulation device. The power supply protection circuit comprises a first connecting end, a switch, a first diode, a second connecting end, a third connecting end, a first inductor and a fourth connecting end, and the first connecting end is used for being connected with a power supply module; the switch is connected with the first connecting end and is used for reducing reverse current; the first diode is connected with the switch and is used for reducing backward voltage; the second connecting end is connected with the first diode and is used for being connected with a power utilization module; the third connecting end is connected with a power supply module; the first inductor is connected with the third connecting end and is used for reducing reverse current; and the fourth connecting end is connected with the first inductor and is used for being connected with a power utilization module. The utility model can eliminate the impact of reverse voltage and current on the power supply.

Description

Technical Field

[0001] The utility model relates to the field of circuits, and in particular to a protection circuit, a power supply and a magnetic stimulation device for eliminating reverse voltage and current impacts. Background Art

[0002] A magnetic stimulation device is an electromagnetic device that can stimulate living or non-living objects by generating a magnetic field. During the operation of the magnetic stimulation device, the corresponding current is generated by controlling the power module. When the current passes through the magnetic stimulation coil, a magnetic field is generated, thereby applying the magnetic field to the living or non-living object. However, during the use of the electromagnetic device, the power module is easily damaged, which reduces the service life.

[0003] It can be seen that the existing technology still needs to be improved and developed. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a protection circuit, power supply and magnetic stimulation device for eliminating reverse voltage and current shocks, aiming to solve the problem that the power supply module in the prior art is easily damaged.

[0005] The technical solution of the utility model is as follows:

[0006] A power protection circuit, comprising:

[0007] A first connection end, used to connect to a power module;

[0008] a switch connected to the first connection end, and configured to reduce reverse current;

[0009] A first diode, connected to the switch, for reducing a reverse voltage;

[0010] A second connection end, connected to the first diode, and used to be connected to a power module;

[0011] A third connection terminal is used to connect to a power module;

[0012] A first inductor connected to the third connection terminal, used to reduce reverse current;

[0013] The fourth connection end is connected to the first inductor and is used to connect to a power module.

[0014] The effect of the above scheme is that: in the power protection circuit of the utility model, the switch can prevent the reverse current from forming a loop when it is disconnected, thereby disconnecting the reverse current and protecting the power module; the first diode can suppress the impact of the reverse voltage on the power module and reduce the impact of the reverse voltage on the power module; the first inductor can suppress the impact of transient pulse current on the power module, thereby achieving effective protection of the power module and enhancing the stability and reliability of the power module.

[0015] In a further preferred embodiment, in the power protection circuit, the first diode is an insulated gate bipolar transistor.

[0016] The effect of the above solution is that the insulated gate bipolar transistor (IGBT) can withstand a higher voltage and has a relatively fast switching speed, and can accurately cut off the reverse current to protect the power module.

[0017] A power supply comprises: the power protection circuit as described above, and a power module connected to the power protection circuit.

[0018] The effect of the above scheme is that: the protection circuit in the power supply of the utility model is provided with a switch, which can prevent the reverse current from forming a loop when disconnected, thereby effectively disconnecting the reverse current and providing protection for the power module; through the action of the first diode, the power supply can suppress the impact of the reverse voltage on the power module, reducing the adverse effect of the reverse voltage on the power module; the first inductor is used to suppress the impact of transient pulse current on the power module, further enhancing the stability of the power supply, and enhancing the reliability and service life of the power supply.

[0019] In a further preferred embodiment, the power supply, wherein the power supply module, comprises: a rectifier unit connected to the power supply protection circuit, and a transformer unit connected to the rectifier unit.

[0020] The effect of the above scheme is that the voltage can be boosted by the transformer unit to reach the voltage required by the electromagnetic generation module; the alternating current (AC) output by the transformer unit can be converted into direct current (DC) by the rectifier unit, ensuring that the power supply can provide stable direct current.

[0021] In a further preferred embodiment, the power supply, wherein the rectifier unit, comprises: a first current direction control component connected to the transformer unit, and a second current direction control component connected to the transformer unit, wherein the first current direction control component is used to control the direction of the output current to a preset direction, and the second current direction control component is used to control the direction of the input current to a preset direction.

[0022] The effect of the above scheme is that the rectifier unit cuts off the current flowing to the transformer unit through the first current direction control component, and cuts off the current flowing out of the transformer unit through the second current direction control component, so that the current can first flow out of the first current direction control component, then pass through the electromagnetic generation module, and finally flow into the second current direction control component. It can be seen that the rectifier unit effectively controls the direction of the current through the first current direction control component and the second current direction control component, providing a stable DC power supply for subsequent circuits or devices.

[0023] In a further preferred embodiment, the power supply, wherein the transformer unit comprises: a core column, a first winding wound on the core column, a second winding wound on the core column, and a third winding wound on the core column;

[0024] The first current direction control component includes: a second diode, a third diode, a fourth diode and a fifth diode, wherein the anode of the second diode is connected to the first end of the first winding, the cathode of the second diode is connected to the first connection end, the anode of the third diode is connected to the second end of the first winding, the cathode of the fourth diode is connected to the first connection end, the cathode of the fourth diode is connected to the first end of the first winding, and the cathode of the fifth diode is connected to the second end of the first winding;

[0025] The second current direction control component includes: a sixth diode, a seventh diode, an eighth diode and a ninth diode, the cathode of the sixth diode is connected to the first end of the second winding, the anode of the sixth diode is connected to the fourth connection end, the cathode of the seventh diode is connected to the second end of the second winding, the anode of the seventh diode is connected to the fourth connection end, the anode of the eighth diode is connected to the first end of the second winding, the cathode of the eighth diode is connected to the anode of the fourth diode and the anode of the fifth diode respectively, the anode of the ninth diode is connected to the second end of the second winding, and the cathode of the ninth diode is connected to the anode of the fourth diode and the anode of the fifth diode respectively.

[0026] The effect of the above scheme is that: through the electromagnetic mutual induction effect between the first winding and the second winding and the third winding, the electric energy is transmitted from the first winding to the second winding and the third winding, and the boost process is completed; then, the direction of the current is controlled by the first current direction control component composed of the second diode, the third diode, the fourth diode, and the fifth diode, and the second current direction control component composed of the sixth diode, the seventh diode, the eighth diode, and the ninth diode, the reverse current is cut off, and the current is converted into direct current and transmitted to the electromagnetic generation module, that is, the current is controlled to flow from the first current direction control component to the electromagnetic generation module, rather than from the second current direction control component to the electromagnetic generation module; at the same time, through the connection between the eighth diode, the fourth diode, the fifth diode, and the ninth diode, the current is controlled to flow from the first current direction control component to the second current direction control component, thereby improving the stability and reliability of the direct current output.

[0027] In a further preferred embodiment, the power supply further comprises: a first capacitor, wherein two ends of the first capacitor are respectively connected to the first connection end and the fourth connection end;

[0028] A second inductor, wherein two ends of the second inductor are respectively connected to the first current direction control component and the first connection end.

[0029] The effect of the above solution is that the first capacitor and the second inductor together form an LC filter circuit, which can provide a current filtering function, filter out the AC component, make the output DC smoother, and help improve the performance and stability of the power supply.

[0030] An electromagnetic device, comprising: the power supply as described above, a control module connected to the power supply, and an electromagnetic generating module connected to the power supply.

[0031] The effect of the above scheme is that in the electromagnetic device of the utility model, the control module can control the power supply so that the power supply can emit a current of a certain timing. The power supply module is connected to the electromagnetic generating module through the power supply protection circuit, thereby transmitting the current to the electromagnetic generating module. The electromagnetic generating module generates a magnetic field according to the current. Among them, the switch of the power supply protection module can prevent the reverse current from forming a loop by disconnecting. The first diode can significantly reduce the impact of the reverse voltage on the power supply module. The first inductor can weaken the transient pulse current, thereby effectively protecting the power supply module from damage by reverse current and reverse voltage, and also reducing the risk of failure that may occur during the operation of the electromagnetic device.

[0032] In a further preferred embodiment, the electromagnetic device, wherein the electromagnetic generating module, comprises: a magnetic stimulation coil and a second capacitor; the two ends of the magnetic stimulation coil are respectively connected to the second connection end and the fourth connection end; the two ends of the second capacitor are respectively connected to the second connection end and the fourth connection end.

[0033] The effect of the above scheme is that the second capacitor can quickly charge to store energy and discharge to release energy, and control and adjust the circuit in the circuit; during the discharge process of the second capacitor, the magnetic stimulation coil can generate a corresponding pulse magnetic field.

[0034] In a further preferred embodiment, the electromagnetic device, wherein the electromagnetic generating module, further includes: a tenth diode and a thyristor; the two ends of the tenth diode are respectively connected to the second connection end and the magnetic stimulation coil, for controlling the current to flow out of the magnetic stimulation coil; the two ends of the thyristor are respectively connected to the second connection end and the magnetic stimulation coil, for controlling the current to flow to the magnetic stimulation coil.

[0035] The effect of the above scheme is that the thyristor can block the forward current and reverse current that are less than the forward conduction voltage value, realize the rectification, regulation and control of the current in the circuit, and enhance the stability of the electromagnetic field; the tenth diode allows the current in the opposite direction of the thyristor to pass through, and cooperates with the thyristor to enable the electromagnetic generation module to generate a more stable and reliable electromagnetic field.

[0036] Compared with the prior art, in the power protection circuit of the utility model, the switch can prevent the reverse current from forming a loop when it is disconnected, thereby disconnecting the reverse current and protecting the power module; the first diode can suppress the impact of the reverse voltage on the power module and reduce the impact of the reverse voltage on the power module; the first inductor can suppress the impact of transient pulse current on the power module, thereby achieving effective protection of the power module and enhancing the stability and reliability of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a power supply module, a power supply protection circuit and an electromagnetic generating module of an electromagnetic device in one embodiment of the utility model.

[0038] Figure 2 It is a schematic diagram of the structure of an electromagnetic device in one embodiment of the utility model.

[0039] Figure 3 The figure is a schematic diagram of a power charging control waveform in one embodiment of the utility model.

[0040] Figure 4 The figure is a schematic diagram of a thyristor discharge control waveform in one embodiment of the utility model.

[0041] Figure 5 Schematic diagram of waveforms at both ends of the second capacitor in one embodiment of the utility model.

[0042] Figure 6 Schematic diagram of the current waveform of the magnetic stimulation coil in one embodiment of the utility model.

[0043] Figure 7 Schematic diagram of the approximate waveform of the second capacitor current in one embodiment of the utility model.

[0044] Figure 8 This is a schematic diagram of the approximate waveform of the magnetic stimulation coil in one embodiment of the utility model.

[0045] Fig. 9 Schematic diagram of the current direction of the electromagnetic generating module at the time T1-T2 in one embodiment of the utility model.

[0046] Fig.10 Schematic diagram of the current direction of the electromagnetic generating module at the time T2-T3 in one embodiment of the utility model.

[0047] Fig.11 Schematic diagram of the current direction of the electromagnetic generating module at the time T3-T4 in one embodiment of the utility model.

[0048] Fig.12 Schematic diagram of the current direction of the electromagnetic generating module at the time T4-T5 in one embodiment of the utility model. DETAILED DESCRIPTION

[0049] This embodiment provides a protection circuit, power supply and magnetic stimulation device for eliminating reverse voltage and current impact. In order to make the purpose, technical solution and effect of this embodiment clearer and more specific, the embodiment is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain this embodiment and are not used to limit this embodiment.

[0050] See also Figure 1 The power protection circuit includes: a first connection terminal 101, a switch 102, a first diode 103, a second connection terminal 104, a third connection terminal 105, a first inductor 106 and a fourth connection terminal 107.

[0051] The first connection end 101 is used to connect to the power module 210 .

[0052] The first connection terminal 101 is a connection point in the voltage protection circuit for connecting to the power module 210. The power protection circuit is connected to the power module 210 to transmit the power of the power module 210 to the power module through the power protection circuit.

[0053] The switch 102 is connected to the first connection terminal 101 and is used to reduce reverse current.

[0054] The switch 102 can control the current in the circuit by opening and closing the circuit. The switch 102 can open the circuit when a reverse current appears in the circuit, thereby preventing the reverse current from forming a loop, thereby avoiding damage to the power module 210. The switch 102 can close the circuit when there is no reverse current in the circuit, thereby achieving circuit conduction.

[0055] In some scenarios, the first connection terminal 101 can be considered as a connection point on the switch 102 .

[0056] The first diode 103 is connected to the switch 102 and is used to reduce the reverse voltage.

[0057] The first diode 103 can only allow forward current to pass through, so it can reduce the impact of reverse voltage on the power module 210, suppress the impact of reverse voltage, and protect the power module 210 from damage. Therefore, the first diode 103 can also replace other components that can allow forward current to pass through, such as a transistor.

[0058] The first diode 103 is connected to the switch 102 , that is, one end of the switch 102 is connected to the first connection end 101 , and the other end of the switch 102 is connected to the first diode 103 , that is, the switch 102 and the first diode 103 form a series circuit.

[0059] The second connection end 104 is connected to the first diode 103 and is used to be connected to a power module.

[0060] The second connection end 104 is a connection point connected to the first diode 103 and can be connected to a power-consuming module to transmit current to the power-consuming module, such as an electromagnetic generating module.

[0061] In some embodiments, the second connection terminal 104 can be considered as a connection point on the first diode 103 .

[0062] The third connection terminal 105 is used to connect to the power module 210 .

[0063] The third connection terminal 105 is another connection point in the voltage protection circuit for connecting to the power module 210. The power protection circuit is connected to the power module 210 to achieve current flowing out through the power module and then flowing to the power supply 20 through the third connection terminal 105 of the power protection circuit.

[0064] The first inductor 106 is connected to the third connection terminal 105 and is used to reduce reverse current.

[0065] The first inductor 106 can suppress the reverse current when the reverse current exists, and in particular can greatly suppress the transient pulse reverse current, thereby preventing the reverse current from damaging the power module 210 .

[0066] In the power protection circuit, the first inductor 106 suppresses the impact of transient pulse current on the power module 210, thereby achieving effective protection for the power module 210 and enhancing the stability and reliability of the power module 210.

[0067] The fourth connection terminal 107 is connected to the first inductor 106 and is used to be connected to a power-consuming module.

[0068] The fourth connection terminal 107 is a connection point connected to the first inductor 106. Through the fourth connection terminal 107, the first inductor 106 is connected to the power module.

[0069] In some embodiments, the third connection terminal 105 and the fourth connection terminal 107 can be considered as two connection points of the first inductor 106. The power protection circuit can be applied to various electronic devices and provide protection for the power supply 20 in the electronic device. For example, the power protection circuit provides protection for the power module 210 in the electromagnetic device.

[0070] In the power protection circuit of this embodiment, the switch 102 can prevent the reverse current from forming a loop when it is turned off, thereby disconnecting the reverse current and protecting the power module 210; the first diode 103 can suppress the impact of the reverse voltage on the power module 210 and reduce the impact of the reverse voltage on the power module 210; the first inductor 106 can suppress the impact of the transient pulse current on the power module 210, thereby achieving effective protection for the power module 210 and enhancing the stability and reliability of the power module 210. It can be seen that the power protection circuit is a circuit that eliminates the impact of reverse voltage and current and provides protection for the power module 210.

[0071] In the electromagnetic device, the switch 102 is used as the second capacitor charging switch, which controls the opening and closing of the charging circuit after rectification and filtering; the first diode 103, which is unidirectionally conductive, prevents the current from flowing back into the power module; the first inductor 106 prevents the rapid change of current from impacting the inside of the power module.

[0072] In a further preferred embodiment of the first inductor, the power protection circuit, wherein the first diode 103 is an insulated gate bipolar transistor.

[0073] The first diode 103 is an insulated gate bipolar transistor (IGBT). The insulated gate bipolar transistor has the ability to withstand higher voltages and can effectively withstand the impact of reverse voltage. Moreover, the switching speed of the insulated gate bipolar transistor is relatively fast (the switching speed of the IGBT is generally below the microsecond level), and the reverse current can be accurately disconnected, thereby achieving effective protection for the power module 210.

[0074] The insulated gate bipolar transistor (IGBT) can withstand a relatively high voltage and has a relatively fast switching speed, and can accurately cut off the reverse current to protect the power module 210 .

[0075] See also Figure 1 This embodiment also provides a power supply 20, including: the power protection circuit as above, and a power module 210 connected to the power protection circuit.

[0076] The power supply 20 includes a power protection circuit and a power module 210. The power module 210 is connected to the power protection circuit, so that the power module 210 can supply power to the power-consuming module through the power protection circuit.

[0077] The function of the power module 210 is to provide electric energy to the electronic device or apparatus. The power module 210 can be connected to an external household power supply line to provide the required electric energy to the electronic device or apparatus.

[0078] The power protection circuit can protect the power module 210 by eliminating the impact of reverse voltage and current. Among them, the power protection circuit is provided with a switch 102, which can prevent the reverse current from forming a loop when disconnected, thereby effectively disconnecting the reverse current and providing protection for the power module 210. The power protection circuit is provided with a first diode 103, which can suppress the impact of the reverse voltage on the power module 210 and reduce the adverse effect of the reverse voltage on the power module 210. The power protection circuit is provided with a first inductor 106, which is used to suppress the impact of transient pulse current on the power module 210, further enhancing the stability, reliability and service life of the power supply 20.

[0079] In a further preferred embodiment, the power supply 20, wherein the power supply module 210, comprises: a rectifier unit connected to the power supply protection circuit, and a transformer unit connected to the rectifier unit.

[0080] The rectifier unit is connected to the power protection circuit and is used to adjust the current in the line, specifically to convert the AC power output by the transformer unit into DC power and provide a stable DC power output for the power protection circuit and the power consumption module.

[0081] The transformer unit is used to step up or step down the voltage to meet the voltage required by the electromagnetic generation module. Generally, the voltage required by the electromagnetic generation module is relatively high and needs to be stepped up by the transformer unit. Therefore, the power supply 20 is also called a high voltage power supply 20.

[0082] Through the cooperation of the rectifier unit and the transformer unit, the power module 210 realizes voltage regulation and stable output, and provides reliable electric energy for the normal operation of the entire electromagnetic device.

[0083] It can be seen that the voltage can be boosted by the transformer unit to reach the voltage required by the electromagnetic generation module; the alternating current (AC) output by the transformer unit can be converted into direct current (DC) by the rectifier unit, ensuring that the power supply 20 can provide stable direct current.

[0084] In a further preferred embodiment, the power supply 20, wherein the rectifier unit, comprises: a first current direction control component connected to the transformer unit, and a second current direction control component connected to the transformer unit, wherein the first current direction control component is used to control the direction of the output current to a preset direction, and the second current direction control component is used to control the direction of the input current to a preset direction.

[0085] The function of the first current direction control component is to control the output current direction to be a preset direction, and ensure that the current flows in the preset direction. Specifically, the first current direction control component allows the current with a preset direction to flow out, and cuts off the current flow in a non-preset direction. The preset direction of the current is that the current flows out from the first current direction control component, and the current flows from the transformer unit to the first current direction control component. That is, the first current direction control component allows the current of the transformer unit to flow to the power module through the first current direction control component; and cuts off the current from the power module to the first current direction control component. The first current direction control component is equivalent to the positive pole of the power supply 20.

[0086] The function of the second current direction control component is to control the input current direction to a preset direction, and ensure that the current flows in the preset direction. Specifically, the second current direction control component allows the current with a preset direction to flow into the second current direction control component, and cuts off the current in non-preset directions. The preset direction of the current is that the current flows into the second current direction control component after passing through the power module, and the current flows from the second current direction control component to the transformer unit. That is, the second current direction control component allows the current to flow into the second current direction control component after passing through the power module; and cuts off the current of the transformer unit from flowing to the power module through the second current direction control component. The second current direction control component is equivalent to the negative pole of the power supply 20.

[0087] The rectifier unit cuts off the current flowing to the transformer unit through the first current direction control component, and cuts off the current flowing out of the transformer unit through the second current direction control component, so that the current can first flow out of the first current direction control component, then pass through the electromagnetic generation module, and finally flow into the second current direction control component. It can be seen that the rectifier unit effectively controls the direction of the current through the first current direction control component and the second current direction control component, providing a stable DC power supply 20 for subsequent circuits or devices.

[0088] In a further preferred embodiment, the power supply 20 , wherein the transformer unit, comprises: a core column 211 , a first winding 212 wound on the core column 211 , a second winding 213 wound on the core column 211 , and a third winding 214 wound on the core column 211 .

[0089] The core column 211 is the core part of the transformer unit, which is usually in a columnar structure and is used to support and fix the winding. The first winding 212, the second winding 213 and the third winding 214 are coils wound on the core column 211, which are used to realize the conversion and transmission of electric energy. Through the electromagnetic mutual induction effect between the first winding 212 and the second winding 213 and the third winding 214, the electric energy is transmitted and the boost process is completed.

[0090] In the transformer unit, the first winding 212 is the input of the transformer unit, and the second winding 213 and the third winding 214 are the outputs of the transformer unit.

[0091] In a further preferred embodiment, the power supply 20, wherein the first current direction control component includes: a second diode 221, a third diode 222, a fourth diode 223 and a fifth diode 224, the positive electrode of the second diode 221 is connected to the first end of the first winding 212, the negative electrode of the second diode 221 is connected to the first connection end 101, the positive electrode of the third diode 222 is connected to the second end of the first winding 212, the negative electrode of the fourth diode 223 is connected to the first connection end 101, the negative electrode of the fourth diode 223 is connected to the first end of the first winding 212, and the negative electrode of the fifth diode 224 is connected to the second end of the first winding 212.

[0092] The anodes of the second diode 221 and the third diode 222 are connected to the transformer, respectively, and the cathodes of the second diode 221 and the third diode 222 are connected to the power module, respectively. The second diode 221 and the third diode 222 can allow the current input by the transformer unit to flow to the power module, and the second diode 221 and the third diode 222 can cut off the current from the power module.

[0093] The cathodes of the fourth diode 223 and the fifth diode 224 are connected to the transformer, respectively, and the cathodes of the fourth diode 223 and the fifth diode 224 are connected to the second current direction control component, respectively. The fourth diode 223 and the fifth diode 224 can cut off the current from the transformer unit, and the fourth diode 223 and the fifth diode 224 can allow the current from the second current control component. These diodes are used to control the direction of the current, cut off the reverse current, and ensure that the current becomes direct current and is transmitted to the electromagnetic generation module.

[0094] In a further preferred embodiment, the power supply 20, wherein the second current direction control component includes: a sixth diode 225, a seventh diode, an eighth diode 227 and a ninth diode 228, the cathode of the sixth diode 225 is connected to the first end of the second winding 213, the anode of the sixth diode 225 is connected to the fourth connection terminal 107, the cathode of the seventh diode is connected to the second end of the second winding 213, the anode of the seventh diode is connected to the fourth connection terminal 107, the anode of the eighth diode 227 is connected to the first end of the second winding 213, the cathode of the eighth diode 227 is connected to the anode of the fourth diode 223 and the anode of the fifth diode 224 respectively, the anode of the ninth diode 228 is connected to the second end of the second winding 213, and the cathode of the ninth diode 228 is connected to the anode of the fourth diode 223 and the anode of the fifth diode 224 respectively.

[0095] The cathodes of the sixth diode 225 and the seventh diode are connected to the transformer, respectively, and the anodes of the sixth diode 225 and the seventh diode are connected to the power module, respectively. The sixth diode 225 and the seventh diode can cut off the current from the transformer, and the sixth diode 225 and the seventh diode can control the current from the power module to flow into the second current direction control component.

[0096] The anodes of the eighth diode 227 and the ninth diode 228 are respectively connected to the power module transformer, and the cathodes of the eighth diode 227 and the seventh diode are respectively connected to the first current control component. The eighth diode 227 and the ninth diode 228 can cut off the current from the first current control component, and the eighth diode 227 and the ninth diode 228 can allow the current from the transformer unit. The function of these diodes is to further control the direction of the current and improve the stability and reliability of the DC output.

[0097] Through the electromagnetic mutual induction effect between the first winding 212 and the second winding 213 and the third winding 214, the electric energy is transmitted from the first winding 212 to the second winding 213 and the third winding 214, and the boost process is completed; then, the direction of the current is controlled by the first current direction control component composed of the second diode 221, the third diode 222, the fourth diode 223, and the fifth diode 224, and the second current direction control component composed of the sixth diode 225, the seventh diode, the eighth diode 227, and the ninth diode 228, and the reverse current is cut off, so that the current is converted into direct current and transmitted to the electromagnetic generation module, that is, the current is controlled to flow from the first current direction control component to the electromagnetic generation module, rather than from the second current direction control component to the electromagnetic generation module; at the same time, through the connection between the eighth diode 227, the fourth diode 223, the fifth diode 224, and the ninth diode 228, the current is controlled to flow from the first current direction control component to the second current direction control component, thereby improving the stability and reliability of the direct current output.

[0098] In a further preferred embodiment, the power supply 20 further includes: a first capacitor 232 , and two ends of the first capacitor 232 are respectively connected to the first connection terminal 101 and the fourth connection terminal 107 .

[0099] The first capacitor 232 is an electrolytic capacitor, and two ends of the first capacitor 232 are connected to the first connection terminal 101 and the fourth connection terminal 107 respectively.

[0100] Optionally, to improve the circuit's ability to withstand high voltage, the first capacitor 232 is formed by a plurality of electrolytic capacitors connected in series, and / or is connected in series with one or more resistors to balance the voltage of the electrolytic capacitors.

[0101] In a further preferred embodiment, the power supply 20 further includes: a second inductor 231 , and two ends of the second inductor 231 are respectively connected to the first current direction control component and the first connection end 101 .

[0102] The second inductor 231 is an important rectifying element in the power supply 20. Two ends of the second inductor 231 are connected to the first current direction control component and the first connection end 101 respectively.

[0103] The first capacitor 232 and the second inductor 231 together form an LC filter circuit, which provides a current filtering function, filters out the AC component, makes the output DC smoother, and improves the performance and stability of the power supply 20. The synergistic effect of the two makes the power supply 20 safer and more reliable, providing a strong guarantee for the normal operation of the entire device.

[0104] See also Figure 2 This embodiment also provides an electromagnetic device (magnetic stimulator), which includes: the power supply 20 as above, a control module 40 connected to the power supply 20, and an electromagnetic generating module connected to the power supply 20.

[0105] The electromagnetic device is a device that can generate electromagnetics. The electromagnetic device can apply the generated electromagnetics to the human body to stimulate the human body. Therefore, the electromagnetic device can also be called a magnetic stimulation device or a magnetic stimulator, and the magnetic stimulation coil 302 is also called a magnetic stimulation coil. The power protection circuit is actually a circuit that eliminates the reverse voltage and current impact of the magnetic stimulation high-voltage power supply 20.

[0106] The electromagnetic device includes a power supply 20, a control module 40 and an electromagnetic generation module. The control module 40 can control the power supply 20 to emit a current of a certain time sequence. The emitted current is transmitted to the electromagnetic generation module, so that the electromagnetic generation module generates a corresponding electromagnetic field to achieve the desired electromagnetic effect.

[0107] The control module 40 is a circuit device capable of controlling the power supply 20, specifically a main control board. The control module 40 can accurately control the timing of the current, that is, through the control module 40, the power supply 20 can emit a current with a certain timing to meet the current demand of the electromagnetic generating module.

[0108] The electromagnetic generating module is an important component of the electromagnetic device, which is used to generate a magnetic field according to the current. The electromagnetic generating module is connected to the power supply 20, and can transmit the electric energy in the power supply 20 to the electromagnetic generating module, and then use the electromagnetic induction principle to realize the function of generating an electromagnetic field.

[0109] The load of the power supply 20 of the electromagnetic device is a high-voltage energy storage capacitor, that is, the second capacitor; the power supply 20 of the electromagnetic device generally only limits the charging voltage but not the charging current.

[0110] In the electromagnetic device of the present invention, the control module 40 can control the power supply 20 so that the power supply 20 can emit a current with a certain timing. The power supply module 210 is connected to the electromagnetic generating module through the power supply protection circuit, so as to transmit the current to the electromagnetic generating module. The electromagnetic generating module generates a magnetic field according to the current. Among them, the switch 102 of the power supply 20 protection module can prevent the reverse current from forming a loop by disconnecting. The first diode 103 can significantly reduce the impact of the reverse voltage on the power supply module 210. The first inductor 106 can weaken the transient pulse current, thereby effectively protecting the power supply module 210 from damage by reverse current and reverse voltage, and also reducing the risk of failure that may occur during the operation of the electromagnetic device.

[0111] In a further preferred embodiment, the electromagnetic device, wherein the electromagnetic generating module, includes: a magnetic stimulation coil 302 and a second capacitor 301; the two ends of the magnetic stimulation coil 302 are respectively connected to the second connection terminal 104 and the fourth connection terminal 107; the two ends of the second capacitor 301 are respectively connected to the second connection terminal 104 and the fourth connection terminal 107.

[0112] The magnetic stimulation coil 302 can be used in a circuit to generate a magnetic field according to the current, that is, when the current passes through the coil, a magnetic field induction is formed in the coil. The two ends of the magnetic stimulation coil 302 are respectively connected to the second connection end 104 and the fourth connection end 107, so that the current flows in from the second connection end 104, passes through the magnetic stimulation coil 302, and then flows out from the fourth connection end 107.

[0113] The second capacitor 301 is a high-voltage energy storage capacitor. The second capacitor 301 can store electric charge in the circuit and has the characteristic of energy storage. When voltage is applied to the second capacitor 301, electric charge will accumulate on the second capacitor 301 plate, and the second capacitor 301 can release electric charge when no voltage is applied, and fast charging and energy storage and discharge release energy. The second capacitor 301 is also referred to as the discharge second capacitor 301. The two ends of the second capacitor 301 are respectively connected to the second connection terminal 104 and the fourth connection terminal 107, so that the second capacitor 301 is applied with a corresponding voltage through the second connection terminal 104 and the fourth connection terminal 107.

[0114] The second capacitor 301 can quickly charge to store energy and discharge to release energy, and control and adjust the circuit in the circuit; during the discharge process of the second capacitor 301, the magnetic stimulation coil 302 can generate a corresponding pulse magnetic field.

[0115] In a further preferred embodiment, the electromagnetic device, wherein the electromagnetic generating module, further includes: a tenth diode 304 and a thyristor 305; the two ends of the tenth diode 304 are respectively connected to the second connection end 104 and the magnetic stimulation coil 302, for controlling the current to flow out of the magnetic stimulation coil 302; the two ends of the thyristor 305 are respectively connected to the second connection end 104 and the magnetic stimulation coil 302, for controlling the current to flow to the magnetic stimulation coil 302.

[0116] When the forward voltage of the thyristor 305 is small, for example, when the forward voltage is less than the forward conduction voltage value, the forward current cannot pass through the thyristor 305, thereby preventing the forward current less than the forward conduction voltage value; when the forward voltage of the thyristor 305 is greater than or equal to the forward conduction voltage value, the current is allowed to pass through the thyristor 305, thereby achieving the conduction of the circuit. When the two ends of the thyristor 305 are in reverse voltage, the reverse current cannot pass through the thyristor 305. Through the action of the thyristor 305, the rectification, regulation and control of the current in the circuit can be achieved, which can enhance the stability of the electromagnetic field and improve the performance and reliability of the electromagnetic device.

[0117] The positive pole of the thyristor 305 is connected to the second connection terminal 104, and the negative pole of the thyristor 305 is connected to the magnetic stimulation coil 302. When the forward voltage is greater than the forward conduction voltage value, the current can be transmitted from the second connection terminal 104 to the magnetic stimulation coil 302; the current from the magnetic stimulation coil 302 is prevented from passing through the thyristor 305; and the current whose forward voltage is less than the forward conduction voltage value is prevented from passing through the thyristor 305.

[0118] The second capacitor 301, the thyristor 305, the diode 304 and the magnetic stimulation coil 302 together form the discharge part of the electromagnetic device.

[0119] The tenth diode 304 allows the current in the opposite direction to the thyristor 305 to pass through, and cooperates with the thyristor 305. The regulation and control of electromagnetic wave radiation can be optimized, so that the electromagnetic generation module can generate a more stable and reliable electromagnetic field.

[0120] The two ends of the tenth diode 304 are connected to the second connection terminal 104 and the magnetic stimulation coil 302 respectively, that is, the tenth diode 304 is connected in parallel with the thyristor 305, and the directions of the currents allowed to pass through the two are opposite. The anode of the tenth diode 304 is connected to the magnetic stimulation coil 302, and the cathode of the tenth diode 304 is connected to the second connection terminal 104, which can allow the current from the magnetic stimulation coil 302 to pass through the tenth diode 304; and prevent the current from the second connection terminal 104 from passing through the tenth diode 304.

[0121] It can be seen that the thyristor 305 can block the forward current and reverse current that are less than the forward conduction voltage value, realize the rectification regulation and control of the current in the circuit, and enhance the stability of the electromagnetic field; the tenth diode 304 allows the current in the opposite direction of the thyristor 305 to pass through, and cooperates with the thyristor 305 to enable the electromagnetic generation module to generate a more stable and reliable electromagnetic field.

[0122] Compared with the prior art, in the power protection circuit of the utility model, the switch 102 can prevent the reverse current from forming a loop when disconnected, thereby disconnecting the reverse current and protecting the power module 210; the first diode 103 can suppress the impact of the reverse voltage on the power module 210 and reduce the impact of the reverse voltage on the power module 210; the first inductor 106 can suppress the impact of transient pulse current on the power module 210, thereby achieving effective protection of the power module 210 and enhancing the stability and reliability of the power module 210.

[0123] The technical solution of the utility model is specifically described below through tests.

[0124] Figure 2 Schematic diagram of the structure of the electromagnetic device. The electromagnetic device (magnetic stimulation host or magnetic stimulator) includes a high-voltage power supply module 210, a second capacitor (discharging capacitor) 301, and a control unit in the main control board (control module 40). After receiving the command, the control unit controls the high-voltage power supply module 210 to send a certain timing charging and discharging waveform to charge the second capacitor (energy storage capacitor) 301, and controls the discharge switch 102 to make the second capacitor 301 discharge the magnetic stimulation coil 302. The magnetic stimulation coil 302 generates a pulsed magnetic field to act on the human body. Among them, the charging control waveform of the power supply 20, the discharge control waveform of the thyristor 305, the waveform at both ends of the second capacitor 301, and the current waveform of the magnetic stimulation coil 302 are respectively as shown in FIG. Figure 3 , Figure 4 , Figure 5 and Figure 6 shown.

[0125] By analyzing the voltage and current waveform of the discharge circuit of the magnetic stimulation coil 302, it is found that harmful current and harmful reverse voltage impact the internal circuit of the power module 210, which has an adverse effect. Specifically, the discharge current of the magnetic stimulation coil is similar to a sine wave, such as Figure 7 and Figure 8 As shown. The following will analyze the T1-T2 moment, T2-T3 moment, T3-T4 moment and T4-T5 moment respectively.

[0126] T1-T2 moment:

[0127] See also Fig. 9, the second capacitor 301 discharges the magnetic stimulation coil 302. At T1, the voltage of the second capacitor 301 is at its maximum value U+max, the thyristor 305 is turned on, and the current increases from 0——>+Imax. The reverse electromotive force of the magnetic stimulation coil 302 prevents the current from increasing. At T2, the current +Imax of the magnetic stimulation coil 302 is at its maximum, and the voltage of the second capacitor 301 is 0. Due to the reverse cutoff effect of the first current control component connected to the transformer of the power module 210, although the internal circuit of the power module 210 will not generate current, there will be an impact of the reverse voltage Uc2, which may damage components.

[0128] T2-T3 moment:

[0129] See also Fig.10 , the magnetic stimulation coil 302 acts as a current source, reversely charging the second capacitor 301, and the current continues to flow through the thyristor 305 loop, and the current goes from +Imax——>0. The electromotive force of the magnetic stimulation coil 302 is in the same direction as the current; this electromotive force causes the current to enter the interior of the power module 210, which has a harmful effect on the power module 210 and causes the internal components to heat up. At T3, the current of the magnetic stimulation coil 302 is 0, and the reverse voltage of the energy storage second capacitor 301 is the maximum -Um.

[0130] T3-T4 moment:

[0131] See also Fig.11 , the reverse voltage of the second capacitor 301 discharges the magnetic stimulation coil 302, and the magnetic stimulation coil 302 prevents the current from increasing, opens the tenth diode 304 loop, and the current goes from 0-->-Im, and the electromotive force of the charging magnetic stimulation coil 302 is opposite to the reverse current; the reverse voltage will also enter the interior of the power module 210, and have a harmful effect on the power module 210. The current enters the interior of the power module 210, and has a harmful effect on the power module 210, causing the internal components to heat up. At T4, the current of the magnetic stimulation coil 302 is -Im, and the reverse voltage of the second capacitor 301 is 0.

[0132] T4-T5 moment:

[0133] See also Fig.12 , the magnetic stimulation coil 302 acts as a current source to positively charge the second capacitor 301, and the current continues to flow through the tenth diode 304 loop, and the current goes from -Im——>0. This electromotive force will enter the interior of the power module 210, which will have a harmful effect on the power module 210, causing the internal components to bear reverse voltage. At T5, the current of the magnetic stimulation coil 302 is 0, and the voltage of the energy storage second capacitor 301 is the maximum Ut5.

[0134] It can be seen that without protection,

[0135] At the time T1-T2 and the time T4-T5, the reverse voltage will enter the interior of the power supply 20, causing a harmful effect on the power supply 20 and causing the internal components to withstand the reverse voltage.

[0136] At the time T2-T3 and the time T3-T4, the reverse current will enter the interior of the power supply 20, causing harmful effects on the power supply 20 and causing the internal components to be subjected to current shock.

[0137] In order to eliminate these adverse effects, the circuit is improved by adding a power protection circuit consisting of a diode, a first inductor 106 and a switch 102. Among them, (1) the high-voltage diode (first diode 103) prevents the reverse voltage from impacting the power supply 20; the first inductor 106 prevents the transient pulse current from impacting the power supply 20; (2) the switch 102 is disconnected when the coil is discharged, so that the current cannot form a loop, thereby disconnecting the reverse current. (3) The selection of switch 102, for example: high-voltage IGBT. The control waveform generating circuit based on the IGBT switch 102 can achieve: the driving signal of the switch 102 is the same as the charging signal of the high-voltage power supply 20, complementary to the discharge signal, and has a dead time, such as Figure 3 and Figure 4 (4) Since the IGBT drive waveform is loaded on the high voltage output side of the power supply 20, when the low voltage signal is introduced, the drive end needs to be isolated.

[0138] It can be seen that the above analysis and measured results verify the generation of harmful voltage and current when the magnetic stimulator is working, and the reverse irrelevant current can be completely eliminated through the power protection circuit, reducing the secondary heating of the power supply 20 system and improving stability.

[0139] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made according to the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A protection circuit for eliminating reverse voltage and current shock, characterized in that: include: A first connection end, used to connect to a power module; a switch connected to the first connection end, and configured to reduce reverse current; A first diode, connected to the switch, for reducing a reverse voltage; A second connection end, connected to the first diode, and used to be connected to a power module; A third connection terminal is used to connect to a power module; A first inductor connected to the third connection terminal, used to reduce reverse current; The fourth connection end is connected to the first inductor and is used to connect to a power module.

2. The protection circuit for eliminating reverse voltage and current shock according to claim 1, characterized in that: The first diode is an insulated gate bipolar transistor.

3. A power supply, characterized in that: include: A protection circuit as claimed in any one of claims 1 to 2, and a power supply module connected to the protection circuit.

4. The power supply according to claim 3, characterized in that: The power module includes: a rectifier unit connected to the protection circuit, and a transformer unit connected to the rectifier unit.

5. The power supply according to claim 4, characterized in that: The rectifier unit includes: a first current direction control component connected to the transformer unit, and a second current direction control component connected to the transformer unit, wherein the first current direction control component is used to control the direction of the output current to be a preset direction, and the second current direction control component is used to control the direction of the input current to be a preset direction.

6. The power supply according to claim 5, characterized in that: The transformer unit comprises: a core column, a first winding wound on the core column, a second winding wound on the core column and a third winding wound on the core column; The first current direction control component includes: a second diode, a third diode, a fourth diode and a fifth diode, wherein the anode of the second diode is connected to the first end of the first winding, the cathode of the second diode is connected to the first connection end, the anode of the third diode is connected to the second end of the first winding, the cathode of the fourth diode is connected to the first connection end, the cathode of the fourth diode is connected to the first end of the first winding, and the cathode of the fifth diode is connected to the second end of the first winding; The second current direction control component includes: a sixth diode, a seventh diode, an eighth diode and a ninth diode, the cathode of the sixth diode is connected to the first end of the second winding, the anode of the sixth diode is connected to the fourth connection end, the cathode of the seventh diode is connected to the second end of the second winding, the anode of the seventh diode is connected to the fourth connection end, the anode of the eighth diode is connected to the first end of the second winding, the cathode of the eighth diode is connected to the anode of the fourth diode and the anode of the fifth diode respectively, the anode of the ninth diode is connected to the second end of the second winding, and the cathode of the ninth diode is connected to the anode of the fourth diode and the anode of the fifth diode respectively.

7. The power supply according to claim 5, characterized in that: The power supply further comprises: A first capacitor, wherein two ends of the first capacitor are respectively connected to the first connection end and the fourth connection end; A second inductor, wherein two ends of the second inductor are respectively connected to the first current direction control component and the first connection end.

8. A magnetic stimulation device, characterized in that: include: A power supply as claimed in any one of claims 3 to 7, a control module connected to the power supply, and an electromagnetic generating module connected to the power supply.

9. The magnetic stimulation device according to claim 8, characterized in that The electromagnetic generation module includes: a magnetic stimulation coil and a second capacitor; the two ends of the magnetic stimulation coil are respectively connected to the second connection end and the fourth connection end; the two ends of the second capacitor are respectively connected to the second connection end and the fourth connection end.

10. The magnetic stimulation device according to claim 9, characterized in that The electromagnetic generating module also includes: a tenth diode and a thyristor; the two ends of the tenth diode are respectively connected to the second connection end and the magnetic stimulation coil, for controlling the current to flow out of the magnetic stimulation coil; the two ends of the thyristor are respectively connected to the second connection end and the magnetic stimulation coil, for controlling the current to flow to the magnetic stimulation coil.

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