Alternating current and direct current conjugate reactor and frequency conversion device

Abstract

The utility model discloses an alternating current and direct current conjugate reactor and frequency conversion device, which comprises a base frame, a conjugate magnetic core, a first reactance module and a second reactance module, the conjugate magnetic core is arranged on the base frame, the first reactance module is used for being connected with an alternating current side device, and the first reactance module is wound on the conjugate magnetic core; the second reactance module is used for being connected with a direct current side device, the inductive reactance of the second reactance module is larger than that of the first reactance module, the second reactance module is arranged on the conjugate magnetic core, the first reactance module and the second reactance module are integrally arranged on the same conjugate magnetic core, the structure is compact, the overall size is reduced, and use is convenient and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic equipment technical field, especially intercommunion conjugation reactor and frequency conversion device of alternating current. BACKGROUND

[0002] In the frequency conversion circuit, the DC reactor and the AC reactor are the commonly used electronic components, the DC reactor is mainly connected to the DC output end of the frequency conversion circuit, and is used for limiting the overcurrent of the DC current, and the AC reactor is mainly connected to the AC input end of the frequency conversion circuit, and is used for controlling the voltage and the current of the AC. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, for this, the utility model provides an intercommunion conjugation reactor and frequency conversion device, compact structure, reduce the overall volume, convenient and reliable.

[0004] The intercommunion conjugation reactor according to the first aspect of the utility model comprises a base frame, a conjugate magnetic core arranged on the base frame, a first reactance module for being connected with an AC side device, the first reactance module being arranged on the conjugate magnetic core, and a second reactance module for being connected with a DC side device, the inductive reactance of the second reactance module being greater than that of the first reactance module, and the second reactance module being arranged on the conjugate magnetic core.

[0005] The intercommunion conjugation reactor according to the utility model has at least the following beneficial effects:

[0006] The intercommunion conjugation reactor according to the utility model integrates the first reactance module connected with the AC side device and the second reactance module connected with the DC side device on the same conjugate magnetic core, so that the structure is compact, the overall volume is reduced, and the intercommunion conjugation reactor is convenient and reliable to use.

[0007] According to some embodiments of the utility model, the conjugate magnetic core has a first ring arm, the first reactance module comprises a first coil and a second coil coupled with each other, and the first coil and the second coil are both arranged on the first ring arm.

[0008] According to some embodiments of the utility model, the conjugate magnetic core has a second ring arm, the second reactance module comprises a third coil and a fourth coil coupled with each other, and the third coil and the fourth coil are both arranged on the second ring arm.

[0009] According to some embodiments of the utility model, part of the first ring arm and part of the second ring arm are connected to make the conjugate magnetic core present a sun-shaped pattern, and the magnetic flux generated by the first coil and the second coil can be offset by the magnetic flux generated by the third coil and the fourth coil.

[0010] According to some embodiments of the utility model, a plurality of connecting end heads are arranged on the base frame, and each of the connecting end heads is connected to the first coil, the second coil, the third coil and the fourth coil correspondingly, each of the connecting end heads is located at the top of the conjugate magnetic core and in the space between the first coil, the second coil, the third coil and the fourth coil.

[0011] According to some embodiments of the utility model, a first temperature control switch element is arranged on the base frame, and the first temperature control switch element is used for detecting the first temperature of the first reactance module and triggering on-off according to the first temperature.

[0012] According to some embodiments of the utility model, a second temperature control switch element is arranged on the base frame, and the second temperature control switch element is used for detecting the second temperature of the second reactance module and triggering on-off according to the second temperature.

[0013] According to some embodiments of the utility model, a plurality of stands are arranged at the bottom of the base frame, and the stands protrude from the first reactance module and the second reactance module to make the first reactance module and the second reactance module both have a space interval between the plane on which the AC-DC conjugate reactor is placed.

[0014] The frequency conversion device according to the second aspect of the utility model comprises a frequency conversion module and the AC-DC conjugate reactor disclosed in any one of the above embodiments, the AC input end of the frequency conversion module is connected to the first reactance module, and the DC output end of the frequency conversion module is connected to the second reactance module.

[0015] The frequency conversion device according to the utility model has at least the following beneficial effects:

[0016] The frequency conversion device of the utility model applies the AC-DC conjugate reactor disclosed in any one of the above embodiments, has a compact structure, reduces the overall volume and is convenient and reliable to use.

[0017] According to some embodiments of the utility model, the frequency conversion module comprises an input rectification module, an inverter module, a voltage conversion module and an output rectification module connected in sequence, the input end of the input rectification module is connected to the first reactance module, and the output end of the output rectification module is connected to the second reactance module.

[0018] Additional aspects and advantages of the present application will be described in the following description, become apparent from the following description, or be learned by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a perspective view of one embodiment of the AC-DC conjugated reactor of the present application;

[0021] Figure 2 It is a perspective view of one embodiment of the conjugated magnetic core;

[0022] Figure 3 It is a principle structure block diagram of one embodiment of the frequency conversion device of the present application.

[0023] REFERENCE NUMERALS

[0024] Base frame 100;Leg stand 110;Conjugated magnetic core 200;First ring arm 210;Second ring arm 220;First reactance module 300;First coil 310;Second coil 320;Second reactance module 400;Third coil 410;Fourth coil 420;Connection end 500;First temperature control switch piece 610;Second temperature control switch piece 620;Input rectification module 710;Inverter module 720;Voltage conversion module 730;Output rectification module 740;Control module 750. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0026] In the description of the present application, it is understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as limiting the present application.

[0027] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1 、 Figure 2 As shown, an AC / DC conjugate inductor according to an embodiment of the first aspect of the present utility model includes a base frame 100, a conjugate magnetic core 200, a first reactance module 300 and a second reactance module 400, the conjugate magnetic core 200 is arranged on the base frame 100, the first reactance module 300 is used to connect with the AC side device, and the first reactance module 300 is wound on the conjugate magnetic core 200; the second reactance module 400 is used to connect with the DC side device, the inductive reactance of the second reactance module 400 is greater than that of the first reactance module 300, and the second reactance module 400 is arranged on the conjugate magnetic core 200.

[0030] Among them, the base frame 100 can be made of steel or aluminum and other alloy materials, and is used to support the conjugate magnetic core 200, the first reactance module 300 and the second reactance module 400. The conjugate magnetic core 200 can be made of iron alloy material. Generally speaking, since the first reactance module 300 is used to connect with the AC side device and the second reactance module 400 is used to connect with the DC side device, the number of coil turns of the second reactance module 400 is usually greater than the number of coil turns of the first reactance module 300, and the inductive reactance of the second reactance module 400 is greater than that of the first reactance module 300.

[0031] The AC / DC conjugate reactor of the present invention integrates a first reactance module 300 connected to an AC side device and a second reactance module 400 connected to a DC side device on the same conjugate magnetic core 200, which has a compact structure, reduces the overall volume, and is convenient and reliable to use.

[0032] The main functions of the first reactance module 300 include: smoothing and filtering the input AC power, reducing transient voltage dv / dt, thereby extending the service life of circuit components; reducing noise and losses; and protecting the frequency converter when used in the frequency converter. By connecting to the AC input terminal of the frequency converter, it improves the power factor and protects the power switching components within the frequency converter. In the power system, the first reactance module 300 has multiple functions such as regulating voltage, limiting short-circuit current, and filtering harmonics to ensure the safe and stable operation of the power grid.

[0033] The second reactance module 400 mainly functions as follows:

[0034] The AC pulsating component superimposed on the DC-side output current is reduced, limiting the AC pulsating component of the current to a specified value, thereby maintaining the continuity of the rectified current, reducing the current pulsation value, improving the input power factor, and suppressing the harmonics generated by the converter. The second reactance module 400 can improve the power factor. When the frequency converter is also equipped with the first reactance module 300, the first reactance module 300 and the second reactance module 400 can cooperate with each other to further improve the power factor. The second reactance module 400 can weaken the impact immediately after power is connected, protecting the circuit from damage. In the converter station, the second reactance module 400 can prevent inverter commutation failure and reduce voltage and current harmonics in the DC line. In the event of a line short circuit, the second reactance module 400 limits the current in the output rectifier module 740 during the line short circuit to prevent excessive current from damaging the device. When operating at minimum current, the second reactance module 400 can maintain current continuity, act as a filter, and reduce the AC pulsating component on the DC side.

[0035] In some embodiments of the present invention, the conjugate magnetic core 200 has a first loop arm 210 , and the first reactance module 300 includes a first coil 310 and a second coil 320 coupled to each other, and the first coil 310 and the second coil 320 are both wound around the first loop arm 210 .

[0036] The first coil 310 and the second coil 320 can both be made of materials such as copper. The first coil 310 and the second coil 320 generate inductive reactance to the current. The current forms a magnetic flux on the first ring arm 210, causing the first coil 310 and the second coil 320 to couple inductively with each other.

[0037] In some embodiments of the present invention, the conjugate magnetic core 200 has a second loop arm 220 , and the second reactance module 400 includes a third coil 410 and a fourth coil 420 coupled to each other, and the third coil 410 and the fourth coil 420 are both wound around the second loop arm 220 .

[0038] Both the third coil 410 and the fourth coil 420 can be made of materials such as copper. The third coil 410 and the fourth coil 420 generate inductive reactance to current, and the current forms magnetic flux on the second loop arm 220, causing the third coil 410 and the fourth coil 420 to be coupled and induced with each other.

[0039] In some embodiments of the present invention, part of the first loop arm 210 and part of the second loop arm 220 are connected so that the conjugate magnetic core 200 is in the shape of a Chinese character 'Ri' (日), and the magnetic flux generated by the first coil 310 and the second coil 320 can cancel out the magnetic flux generated by the third coil 410 and the fourth coil 420.

[0040] The first loop arm 210 and the second loop arm 220 have an overlapping part. As Figure 2 shown, the first coil 310 and the second coil 320 are wound around the first loop arm 210, and the third coil 410 and the fourth coil 420 are wound around the second loop arm 220. For example, the magnetic flux formed by the first coil 310 and the second coil 320 is in the clockwise direction on the first loop arm 210, while the magnetic flux formed by the third coil 410 and the fourth coil 420 is in the counterclockwise direction on the second loop arm 220. Since both the first reactance module 300 and the second reactance module 400 are connected to the circuit for operation, the magnetic fluxes generated by the two can cancel each other out.

[0041] Generally speaking, the magnetic flux generated by the coils on a conventional reactor will accumulate on the conjugate magnetic core 200, and the magnetic flux can only slowly dissipate over time. As the working time increases or the current increases, too much magnetic flux accumulated on the conjugate magnetic core 200 will affect the performance of the reactor. Therefore, in this design, the magnetic fluxes generated by the first reactance module 300 and the second reactance module 400 cancel each other out, stabilizing the operating performance of the reactor.

[0042] In some embodiments of the present invention, a plurality of connection terminals 500 are provided on the base frame 100. Each of the plurality of connection terminals 500 is correspondingly connected to the first coil 310, the second coil 320, the third coil 410, and the fourth coil 420. Each of the connection terminals 500 is located at the top of the conjugate magnetic core 200 and in the space where the first coil 310, the second coil 320, the third coil 410, and the fourth coil 420 are spaced apart from each other.

[0043] The connecting end 500 is used for connecting with external electronic devices, so that the electronic devices can be connected with the first coil 310, the second coil 320, the third coil 410 and the fourth coil 420, the connecting end 500 is located at the top of the conjugate magnetic core 200, and is convenient for users to connect wires, and is arranged in the space spaced from each other among the first coil 310, the second coil 320, the third coil 410 and the fourth coil 420, so that the space is fully utilized, and the structure of the reactor is more compact.

[0044] In some embodiments of the utility model, as shown in Figure 1 The first temperature control switch piece 610 is arranged on the base frame 100, and is used for detecting the first temperature of the first reactor module 300 and triggering on-off according to the first temperature.

[0045] The first temperature control switch piece 610 can be selected from a temperature-sensitive elastic sheet switch, a liquid expansion type temperature control switch and an electric control trigger type switch, when the detected first temperature is lower than a trigger temperature threshold, the first temperature control switch piece 610 remains on, when the detected first temperature is higher than the trigger temperature threshold, the first temperature control switch piece 610 triggers off, and the electronic devices can be connected with the first coil 310 or the second coil 320 in the first reactor module 300 through the first temperature control switch piece 610, and the connection is automatically disconnected when the temperature is too high, thereby improving use safety.

[0046] In some embodiments of the utility model, as shown in Figure 1 The second temperature control switch piece 620 is arranged on the base frame 100, and is used for detecting the second temperature of the second reactor module 400 and triggering on-off according to the second temperature.

[0047] The second temperature control switch piece 620 can be selected from a temperature-sensitive elastic sheet switch, a liquid expansion type temperature control switch and an electric control trigger type switch, when the detected second temperature is lower than a trigger temperature threshold, the second temperature control switch piece 620 remains on, when the detected second temperature is higher than the trigger temperature threshold, the second temperature control switch piece 620 triggers off, and the electronic devices can be connected with the third coil 410 or the fourth coil 420 in the second reactor module 400 through the second temperature control switch piece 620, and the connection is automatically disconnected when the temperature is too high, thereby improving use safety.

[0048] In some embodiments of the utility model, the bottom of the base frame 100 is provided with a plurality of foot supports 110, the foot supports 110 protrude from the first reactor module 300 and the second reactor module 400, so that the first reactor module 300 and the second reactor module 400 are both provided with a space interval between the first reactor module 300 and the second reactor module 400 and a plane on which the AC-DC conjugate reactor is placed.

[0049] The foot stand 110 can lift the base stand 100 as a whole, so that the first reactance module 300 and the second reactance module 400 will not contact or be too close to the plane on which the AC-DC conjugate reactor is placed, the electrical insulation distance is improved, and meanwhile, sufficient space is left for ventilation and heat dissipation, so that the AC-DC conjugate reactor can operate stably.

[0050] According to the frequency conversion device of the second aspect of the utility model, as shown in Figure 1 Figure 3 The frequency conversion device comprises a frequency conversion module and the AC-DC conjugate reactor disclosed in any one of the above embodiments, the AC input end of the frequency conversion module is connected with the first reactance module 300, and the DC output end of the frequency conversion module is connected with the second reactance module 400.

[0051] The frequency conversion device of the utility model has the AC-DC conjugate reactor disclosed in any one of the above embodiments, is compact in structure, reduces the overall volume, and is convenient and reliable to use.

[0052] In some embodiments of the utility model, as shown in Figure 3 The frequency conversion module comprises an input rectification module 710, an inverter module 720, a voltage conversion module 730 and an output rectification module 740 connected in sequence, the input end of the input rectification module 710 is connected with the first reactance module 300, and the output end of the output rectification module 740 is connected with the second reactance module 400.

[0053] Specifically, the input rectification module 710 can comprise a full-bridge rectification circuit or a full-wave rectification circuit formed by a plurality of rectifier diodes, the input end of the input rectification module 710 is connected with the first reactance module 300, the output end of the input rectification module 710 is connected with the input end of the inverter module 720, the inverter module 720 can comprise an H-shaped inverter circuit formed by a plurality of semiconductor switching tubes, the switching tube can be a MOS tube or an IGBT, the frequency conversion device can further comprise a control module 750, the control module 750 can be selected from a processor such as an MCU or a CPU and an accessory circuit thereof, the control module 750 is connected with the controlled ends of the switching tubes respectively to modulate the power frequency, the voltage conversion module 730 can be selected from a conventional transformer, the output end of the inverter module 720 is connected with the primary winding of the transformer, the output rectification module 740 comprises a full-bridge rectification circuit or a full-wave rectification circuit formed by a plurality of rectifier diodes, the input end of the output rectification module 740 is connected with the secondary winding of the transformer, and the output end of the output rectification module 740 is connected with the second reactance module 400.

[0054] ​Any technical features in the above-described embodiments can be combined, and for the sake of brevity, not all possible combinations are described, however, any combination of the technical features is considered to be within the scope of the present specification.

[0055] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An AC-DC conjugated reactor, characterized by, The application relates to an AC-DC conjugated electric reactor, which comprises the following parts: a base frame; a conjugated magnetic core arranged on the base frame; a first reactance module for connecting with an AC device, the first reactance module being arranged on the conjugated magnetic core; a second reactance module for connecting with a DC device, the second reactance module having a larger inductance than the first reactance module, and the second reactance module being arranged on the conjugated magnetic core.

2. An AC-DC conjugated reactor according to claim 1, characterized in that: The conjugated magnetic core has a first ring arm, the first reactance module comprises a first coil and a second coil which are coupled with each other, and the first coil and the second coil are arranged on the first ring arm.

3. An AC-DC conjugated reactor according to claim 2, characterized in that: The conjugated magnetic core has a second ring arm, the second reactance module comprises a third coil and a fourth coil which are coupled with each other, and the third coil and the fourth coil are arranged on the second ring arm.

4. An AC-DC conjugated reactor according to claim 3, characterized in that: Part of the first ring arm and part of the second ring arm are connected to make the conjugated magnetic core in a sun shape, and the magnetic flux generated by the first coil and the second coil can be offset by the magnetic flux generated by the third coil and the fourth coil.

5. An AC-DC conjugated reactor according to claim 4, characterized in that: The base frame is provided with a plurality of connecting terminals, the connecting terminals are respectively connected with the first coil, the second coil, the third coil and the fourth coil, and each connecting terminal is located on the top of the conjugated magnetic core and in the space between the first coil, the second coil, the third coil and the fourth coil.

6. An AC-DC conjugated reactor according to claim 1, characterized in that: The base frame is provided with a first temperature control switch, which is used for detecting the first temperature of the first reactance module and triggering the on-off according to the first temperature.

7. An AC-DC conjugated reactor according to claim 1, characterized in that: The base frame is provided with a second temperature control switch, which is used for detecting the second temperature of the second reactance module and triggering the on-off according to the second temperature.

8. An AC-DC conjugated reactor according to claim 1, characterized in that: The bottom of the base frame is provided with a plurality of legs, the legs protrude from the first reactance module and the second reactance module to make the first reactance module and the second reactance module have a space interval with the plane on which the AC-DC conjugated electric reactor is placed.

9. A frequency conversion device, characterized by The application further relates to a frequency conversion module and the AC-DC conjugated electric reactor, the AC input end of the frequency conversion module is connected with the first reactance module, and the DC output end of the frequency conversion module is connected with the second reactance module.

10. The frequency varying device of claim 9, wherein, The frequency conversion module comprises an input rectification module, an inverter module, a voltage conversion module and an output rectification module which are connected in sequence, the input end of the input rectification module is connected with the first reactance module, and the output end of the output rectification module is connected with the second reactance module.

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