Three-phase AC / DC compatible input control circuit and equipment
The three-phase AC/DC compatible input control circuit, with its three-phase five-wire input and adaptive control, solves the problem of three-phase power supply products being incompatible with DC power, enabling wider application, lower cost, and smaller size.
Patent Information
- Application Number
- CN202423202084.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing three-phase power supply products can only accept three-phase AC power and are not compatible with DC power, resulting in poor versatility, high cost, and large size.
It adopts a three-phase five-wire input method, combined with an adapted control method, and uses the same set of power devices to achieve three-phase AC and DC compatible input. The conversion module converts the AC and DC current.
It improves the versatility of three-phase power products, reduces costs and size, and enhances system usability and efficiency.
Smart Images
Figure CN223693833U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to control circuit technical field, especially a kind of three-phase AC-DC compatible input control circuit and equipment. BACKGROUND
[0002] Three-phase power supply product is mainly composed of AC (alternating current)-DC (direct current) converter, but these power supply products can only input three-phase alternating current, when only direct current input, three-phase AC-DC converter loses effect.In addition, in order to be compatible with the input of direct current, the traditional solution is to additionally increase direct current converter or add direct current input control circuit at input end, resulting in poor versatility of three-phase power supply product, high development cost and large size. SUMMARY
[0003] Therefore, it is necessary to provide a three-phase AC-DC compatible input control circuit and equipment that can improve the versatility of three-phase power supply product, reduce cost and reduce size.
[0004] In a first aspect, the utility model provides a three-phase AC-DC compatible input control circuit, comprising:
[0005] Input module, for inputting to be handled current;To be handled current is three-phase alternating current or direct current;The input mode of to be handled current is three-phase five-wire system;
[0006] Conversion module, connected with input module, for converting to be handled current into target direct current;
[0007] Output module, connected with conversion module, for outputting target direct current.
[0008] In one embodiment, the input module includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, and a fifth input terminal;The conversion module includes a first conversion unit, a second conversion unit, and a third conversion unit;The output module includes an output capacitor;
[0009] The first end of the first conversion unit is connected with the first input terminal, and the second end of the first conversion unit is connected with the output capacitor;
[0010] The first end of the second conversion unit is connected with the second input terminal, and the second end of the second conversion unit is connected with the output capacitor;
[0011] The first end of the third conversion unit is connected with the third input terminal, and the second end of the third conversion unit is connected with the output capacitor;
[0012] The fourth input terminal is grounded, and the fifth input terminal is connected with the output capacitor.
[0013] In one of the embodiments, the first conversion unit comprises a first input inductor, a first switch tube and a second switch tube; a first end of the first input inductor is connected with the first input terminal, and a second end of the first input inductor is connected with a first end of the first switch tube and a first end of the second switch tube respectively; a second end of the first switch tube and a second end of the second switch tube are connected with the output capacitor respectively;
[0014] The second conversion unit comprises a second input inductor, a third switch tube and a fourth switch tube; a first end of the second input inductor is connected with the second input terminal, and a second end of the second input inductor is connected with a first end of the third switch tube and a first end of the fourth switch tube respectively; a second end of the third switch tube and a second end of the fourth switch tube are connected with the output capacitor respectively;
[0015] The third conversion unit comprises a third input inductor, a fifth switch tube and a sixth switch tube; a first end of the third input inductor is connected with the third input terminal, and a second end of the third input inductor is connected with a first end of the fifth switch tube and a first end of the sixth switch tube respectively; a second end of the fifth switch tube and a second end of the sixth switch tube are connected with the output capacitor respectively.
[0016] In one of the embodiments, the conversion module is further configured to, in the case that the current to be processed is direct current, open the second switch tube, the fourth switch tube and the sixth switch tube, and close the first switch tube, the third switch tube and the fifth switch tube, and store energy in the first input inductor, the second input inductor and the third input inductor.
[0017] In one of the embodiments, the conversion module is further configured to, after the first input inductor, the second input inductor and the third input inductor complete the energy storage, close the second switch tube, the fourth switch tube and the sixth switch tube, and open the first switch tube, the third switch tube and the fifth switch tube, and convert the current to be processed into target direct current.
[0018] In one of the embodiments, the conversion module is further configured to control the second switch tube, the fourth switch tube and the sixth switch tube through a triple interleaving control mode.
[0019] In one of the embodiments, the input module is further configured to, in the case that the current to be processed is direct current, connect the first input terminal, the second input terminal and the third input terminal with each other, and connect the first input terminal with a positive electrode of a direct current source to be processed, and connect the fifth input terminal with a negative electrode of the direct current source to be processed.
[0020] In one of the embodiments, a wire diameter of the positive electrode of the direct current source to be processed is a sum of wire diameters of the first input terminal, the second input terminal and the third input terminal; the wire diameters of the positive electrode and the negative electrode of the direct current source to be processed are matched in carrying capacity.
[0021] In one embodiment, the conversion module is further configured to control the first input terminal, the second input terminal, and the third input terminal to be connected to the UVW three phases of the AC source to be processed, respectively, when the current to be processed is a three-phase AC current.
[0022] Secondly, this utility model provides a three-phase AC / DC compatible input control device, including the three-phase AC / DC compatible input control circuit of any one of the embodiments of the first aspect.
[0023] The aforementioned three-phase AC / DC compatible input control circuit and equipment, by adopting a three-phase five-wire input method and supplementing it with an adaptive input control method, utilizes the same set of power devices to achieve AC / DC compatibility, greatly improving the system's usability, saving the cost of three-phase power supply products and reducing their size. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is an example of a three-phase AC / DC compatible input control circuit module structure;
[0026] Figure 2 This is another embodiment of the three-phase AC / DC compatible input control circuit module structure;
[0027] Figure 3 A module structure for AC-DC conversion of a three-phase AC / DC compatible input control circuit is provided as an embodiment.
[0028] Figure 4 This is a module structure for a three-phase AC / DC compatible input control circuit during DC-DC conversion and energy storage, as one embodiment.
[0029] Figure 5 for Figure 4 A schematic diagram of the equivalent BOOST circuit;
[0030] Figure 6 This is a module structure for a three-phase AC / DC compatible input control circuit during DC-DC conversion energy dissipation, as described in one embodiment.
[0031] Figure 7 for Figure 6 A schematic diagram of the equivalent BOOST circuit;
[0032] Figure 8A current control schematic diagram of a three-phase AC / DC compatible input control circuit according to an embodiment.
[0033] Explanation of reference signs:
[0034] 100, input module; 110, first input terminal; 120, second input terminal; 130, third input terminal; 140, fourth input terminal; 150, fifth input terminal; 200, conversion module; 210, first conversion unit; 220, second conversion unit; 230, third conversion unit; 300, output module; C1, output capacitor; L1, first input inductor; L2, second input inductor; L3, third input inductor; Q1, first switch tube; Q2, second switch tube; Q3, third switch tube; Q4, fourth switch tube; Q5, fifth switch tube; Q6, sixth switch tube. DETAILED DESCRIPTION
[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.
[0037] It can be understood that the terms "first", "second" and the like used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, the first resistor can be referred to as the second resistor, and similarly, the second resistor can be referred to as the first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.
[0038] It can be understood that "connection" in the following embodiments, if the circuits, modules, units and the like connected to each other have the transmission of electrical signals or data, should be understood as "electrically connected", "communicatively connected" and the like.
[0039] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", or the like, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
[0040] The three-phase power supply products widely used in the market at present are mainly composed of three-phase AC-DC converters. Such converters are designed to convert three-phase alternating current into direct current to meet the power supply needs of various electrical equipment and systems. However, the design of such converters limits them to only accept three-phase alternating current as input, which limits their application range to some extent.
[0041] In actual applications, there are many scenarios where users may only have direct current power supply available, such as in solar photovoltaic power generation systems, energy storage systems, and certain specific industrial applications. In these cases, three-phase AC-DC converters cannot be directly used and do not have the ability to handle direct current input. To solve this problem, traditional technical solutions usually add an additional DC-DC converter module based on the three-phase AC-DC converter. Although this method can achieve the input of direct current, it increases the complexity of the system and increases the development cost and volume of the power supply product. In addition, this solution requires the power supply system to have both AC-DC and DC-DC conversion functions, which not only increases the design difficulty of the system, but also may lead to a decrease in the overall efficiency of the power supply product, occupy more space, and increase the installation and maintenance costs of the user.
[0042] Therefore, the traditional technology has obvious limitations, and the utility model aims to provide a three-phase AC-DC compatible input control circuit that can improve the versatility of three-phase power supply products, reduce costs, and reduce their volume to overcome the above-mentioned defects.
[0043] In an exemplary embodiment, as shown in Figure 1 A three-phase AC-DC compatible input control circuit is provided, including an input module 100, a conversion module 200, and an output module 300.
[0044] The input module 100 is used to input the current to be processed. The current to be processed is three-phase alternating current or direct current. The input mode of the current to be processed is three-phase five-wire system.
[0045] The conversion module 200 is connected with the input module and is used to convert the current to be processed into target direct current.
[0046] The output module 300 is connected with the conversion module, and is configured to output the target direct current.
[0047] Optionally, the input module 100 accesses an external current source to transmit the to-be-processed current into the conversion module 200. The external current source can be a three-phase alternating current source or a direct current source. The input mode of the to-be-processed current is three-phase five-wire system, and one connection wire is added on the basis of the three-phase four-wire system input mode.
[0048] Optionally, the conversion module 200 is connected with the input module 100, converts the received three-phase alternating current or direct current into the target direct current that can be used, and delivers the target direct current to the output module 300. The output module 300 outputs the target direct current.
[0049] The three-phase alternating current and direct current compatible input control circuit realizes three-phase alternating current and direct current compatible input control by using the same set of power devices through the three-phase five-wire system input mode, significantly improves the versatility of the control circuit, and saves the cost and occupied space of the power supply product.
[0050] In an exemplary embodiment, as shown in FIG. 1, the input module 100 includes a first input terminal 110, a second input terminal 120, a third input terminal 130, a fourth input terminal 140, and a fifth input terminal 150; the conversion module 200 includes a first conversion unit 210, a second conversion unit 220, and a third conversion unit 230; and the output module 300 includes an output capacitor C1. Figure 2 The first end of the first conversion unit 210 is connected with the first input terminal 110, and the second end of the first conversion unit 210 is connected with the output capacitor C1.
[0051] The first end of the second conversion unit 220 is connected with the second input terminal 120, and the second end of the second conversion unit 220 is connected with the output capacitor C1.
[0052] The first end of the third conversion unit 230 is connected with the third input terminal 130, and the second end of the third conversion unit 230 is connected with the output capacitor C1.
[0053] The fourth input terminal 140 is grounded, and the fifth input terminal 150 is connected with the output capacitor C1.
[0054] Exemplarily, the input module 100 adopts a connector J1, which contains five pins PIN1, 2, 3, 4, and 5 corresponding to the first input terminal 110, the second input terminal 120, the third input terminal 130, the fourth input terminal 140, and the fifth input terminal 150, respectively.
[0055] Figure 2 I1, I2, I3 respectively represent the current flowing to the first conversion unit 210, the second conversion unit 220 and the third conversion unit 230. BUS is an intermediate DC bus voltage, representing the output end.
[0056] In an exemplary embodiment, as shown in FIG. 1, the conversion module 200 comprises an input module 100 and a conversion module 200. Figure 2 The first conversion unit 210 comprises a first input inductor L1, a first switch Q1 and a second switch Q2. The first end of the first input inductor L1 is connected with the first input terminal 110, and the second end of the first input inductor L2 is connected with the first end of the first switch Q1 and the second switch Q2 respectively. The second end of the first switch Q1 and the second switch Q2 is connected with the output capacitor C1 respectively.
[0057] The second conversion unit 220 comprises a second input inductor L2, a third switch Q3 and a fourth switch Q4. The first end of the second input inductor L2 is connected with the second input terminal 120, and the second end of the second input inductor L2 is connected with the first end of the third switch Q3 and the fourth switch Q4 respectively. The second end of the third switch Q3 and the fourth switch Q4 is connected with the output capacitor C1 respectively.
[0058] The third conversion unit 230 comprises a third input inductor L3, a fifth switch Q5 and a sixth switch Q6. The first end of the third input inductor L3 is connected with the third input terminal 130, and the second end of the third input inductor L3 is connected with the first end of the fifth switch Q5 and the sixth switch Q6 respectively. The second end of the fifth switch Q5 and the sixth switch Q6 is connected with the output capacitor C1 respectively.
[0059] The following embodiments specifically illustrate the AC-DC conversion scheme of the present application.
[0060] In an exemplary embodiment, as shown in FIG. 1, the conversion module 200 comprises an input module 100 and a conversion module 200. Figure 2 In the case of a three-phase alternating current to be processed, the first input terminal 110, the second input terminal 120 and the third input terminal 130 are connected to the UVW three-phase of the to-be-processed alternating current source respectively.
[0061] Exemplarily, the input module 100 adopts a J1 connector. In the case of a three-phase alternating current to be processed, the PIN1, 2, 3, 4 pins of the J1 connector are connected to the three-phase UVW lines and the ground line respectively according to the three-phase four-wire system. The software control algorithm is used for PFC (Power Factor Correction) control of the three-phase six-switch, so as to realize the conversion of AC-DC.
[0062] The following embodiments specifically illustrate the DC-DC conversion scheme of the present application.
[0063] In an exemplary embodiment, as shown in Figure 3 the input module 100 is further configured to, in the case that the current to be processed is a direct current, connect the first input terminal 110, the second input terminal 120 and the third input terminal 130 to each other, and connect the fifth input terminal 150 to a positive pole of a direct current source to be processed.
[0064] Exemplarily, the input module 100 adopts a J1 connector, connects the PIN1, 2, 3 pins of the J1 connector to each other, and connects the PIN5 pin of the J1 connector to an external -DC source, so as to realize the input of the external DC.
[0065] In an exemplary embodiment, as shown in Figure 4 the conversion module 200 is further configured to, in the case that the current to be processed is a direct current, open the second switch tube Q2, the fourth switch tube Q4 and the sixth switch tube Q6, and close the first switch tube Q1, the third switch tube Q3 and the fifth switch tube Q5, so as to store energy in the first input inductor L1, the second input inductor L2 and the third input inductor L3.
[0066] Exemplarily, when the current to be processed is a direct current, the switch tubes Q2, Q4, Q6 are opened, and the Q1, Q3, Q5 are closed, so as to store energy in the input inductors L1, L2, L3. Wherein, the Q1, Q3, Q5 are closed, which is equivalent to the diodes D1, D3, D4. Figure 4 In the middle, the arrows represent the current flow direction, and the current flows through the switch tubes Q2, Q4, Q6, and returns to the negative pole of the direct current source through the PIN5 pin.
[0067] At this time, the above-mentioned three-phase AC / DC compatible input control circuit can be equivalent to the BOOST circuit (boost chopper circuit) schematic diagram as shown in Figure 5 . Figure 5 In the middle, the arrows represent the current flow direction, and the direct current source current flows through the input inductor to store energy in the input inductor, the switch tube is turned on, and the current returns to the negative pole of the direct current source.
[0068] In an exemplary embodiment, as shown in Figure 6 the conversion module 200 is further configured to, after the first input inductor L1, the second input inductor L2 and the third input inductor L3 complete the energy storage, close the second switch tube Q2, the fourth switch tube Q4 and the sixth switch tube Q6, and open the first switch tube Q1, the third switch tube Q3 and the fifth switch tube Q5, so as to convert the current to be processed into a target direct current.
[0069] Exemplarily, after the first input inductance L1, the second input inductance L2 and the third input inductance L3 complete energy storage, when the switch tubes Q2, Q4 and Q6 are closed and Q1, Q3 and Q5 are opened, the input inductances L1, L2 and L3 discharge energy. Wherein, Q2, Q4 and Q6 are closed, and their functions are equivalent to diodes D2, D4 and D6. Figure 6 In the figure, the arrow indicates the current flow direction, and the input inductance current flows through the switch tubes Q1, Q3 and Q5 and flows into the output module 300, thereby completing the DC-DC conversion.
[0070] At this time, the above-mentioned three-phase AC / DC compatible input control circuit can be equivalent to the input inductance of the BOOST circuit schematic diagram as shown in Figure 7 The electric energy flows into the output circuit to achieve voltage boosting and achieve the effect of DC-DC conversion. Figure 7 In the figure, the arrow indicates the current flow direction, and the input inductance current flows through the switch tubes Q1, Q3 and Q5 and flows into the output module 300, thereby completing the DC-DC conversion.
[0071] The above-mentioned three-phase AC / DC compatible input control circuit replaces the boost diode by using Q1, Q3 and Q5 switch tubes, realizes BOOST synchronous rectification, and greatly improves the utilization efficiency of DC input.
[0072] In an exemplary embodiment, the conversion module 200 is further configured to control the second switch tube Q2, the fourth switch tube Q4 and the sixth switch tube Q6 by using a triple interleaving control mode.
[0073] Exemplarily, based on the BOOST control principle, the switch tubes Q2, Q4 and Q6 use a 120° interleaving control mode, that is, a triple interleaving BOOST voltage boosting control mode. This control mode greatly reduces the BUS voltage ripple and improves the stability of the system.
[0074] In an exemplary embodiment, the wire diameter of the positive electrode of the DC source to be processed is the sum of the wire diameters of the first input terminal, the second input terminal and the third input terminal; the wire diameter of the negative electrode of the DC source to be processed matches the carrying capacity of the positive electrode of the DC source to be processed.
[0075] Exemplarily, the wire diameter of DC+ can meet the carrying capacity of the sum of the first input terminal 110, the second input terminal 120 and the third input terminal 130. The wire diameter of DC- needs to match that of DC+.
[0076] In an exemplary embodiment, as shown in Figure 8As shown, a current control schematic of a three-phase AC / DC compatible input control circuit is provided. Wherein, Vref and VBUS are basic power supplies; PI is a proportional integral (Proportional Integral) controller, used to adjust the response speed and control accuracy of the system; I1, I2, I3 are the currents flowing into each conversion unit, Iref is the input current of PI; Limiter is used to limit the amplitude or frequency of the current signal; PWM is a pulse width modulation (Pulse Width Modulation) controller, used to adjust the duty cycle of the signal to control the average power; the switch tube Q1-Q6 is driven by the PWM controller to realize the conduction or closing of each circuit in the conversion module 200.
[0077] In one exemplary embodiment, a three-phase AC / DC compatible input control device is provided, comprising the three-phase AC / DC compatible input control circuit in any of the above embodiments.
[0078] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.
[0079] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.
[0080] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A three-phase AC / DC compatible input control circuit, characterized in that, include: An input module is used to input the current to be processed; the current to be processed is a three-phase AC current or a DC current; the input method of the current to be processed is a three-phase five-wire system; A conversion module, connected to the input module, is used to convert the current to be processed into a target DC current; An output module, connected to the conversion module, is used to output the target DC current.
2. The three-phase AC / DC compatible input control circuit according to claim 1, characterized in that, The input module includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, and a fifth input terminal; the conversion module includes a first conversion unit, a second conversion unit, and a third conversion unit; the output module includes an output capacitor. The first end of the first conversion unit is connected to the first input terminal, and the second end of the first conversion unit is connected to the output capacitor; The first end of the second conversion unit is connected to the second input terminal, and the second end of the second conversion unit is connected to the output capacitor; The first end of the third conversion unit is connected to the third input terminal, and the second end of the third conversion unit is connected to the output capacitor; The fourth input terminal is grounded, and the fifth input terminal is connected to the output capacitor.
3. The three-phase AC / DC compatible input control circuit according to claim 2, characterized in that, The first conversion unit includes a first input inductor, a first switching transistor, and a second switching transistor; a first end of the first input inductor is connected to the first input terminal, and a second end of the first input inductor is connected to the first ends of the first switching transistor and the second switching transistor, respectively; the second ends of the first switching transistor and the second switching transistor are respectively connected to the output capacitor. The second conversion unit includes a second input inductor, a third switch, and a fourth switch; a first end of the second input inductor is connected to the second input terminal, and a second end of the second input inductor is connected to the first ends of the third switch and the fourth switch, respectively; the second ends of the third switch and the fourth switch are respectively connected to the output capacitor. The third conversion unit includes a third input inductor, a fifth switch, and a sixth switch; the first end of the third input inductor is connected to the third input terminal, and the second end of the third input inductor is connected to the first ends of the fifth switch and the sixth switch, respectively; the second ends of the fifth switch and the sixth switch are respectively connected to the output capacitor.
4. The three-phase AC / DC compatible input control circuit according to claim 3, characterized in that, The conversion module is further configured to, when the current to be processed is DC, turn on the second switch, the fourth switch, and the sixth switch, and turn off the first switch, the third switch, and the fifth switch, to store energy in the first input inductor, the second input inductor, and the third input inductor.
5. The three-phase AC / DC compatible input control circuit according to claim 4, characterized in that, The conversion module is further configured to, after the first input inductor, the second input inductor, and the third input inductor have completed energy storage, turn off the second switch, the fourth switch, and the sixth switch, and turn on the first switch, the third switch, and the fifth switch, so as to convert the current to be processed into the target DC current.
6. The three-phase AC / DC compatible input control circuit according to claim 3, characterized in that, The conversion module is also used to control the second switch, the fourth switch and the sixth switch through a triple interleaved control method.
7. The three-phase AC / DC compatible input control circuit according to claim 3, characterized in that, The input module is further configured to, when the current to be processed is a DC current, control the first input terminal, the second input terminal and the third input terminal to be interconnected and connected to the positive terminal of the DC source to be processed, and control the fifth input terminal to be connected to the negative terminal of the DC source to be processed.
8. The three-phase AC / DC compatible input control circuit according to claim 7, characterized in that, The wire diameter of the positive terminal of the DC source to be processed is the sum of the power supply wire diameters of the first input terminal, the second input terminal, and the third input terminal; the wire diameter of the negative terminal of the DC source to be processed is matched with the wire diameter of the positive terminal of the DC source to be processed.
9. The three-phase AC / DC compatible input control circuit according to claim 3, characterized in that, The conversion module is also used to control the first input terminal, the second input terminal and the third input terminal to be connected to the UVW three phases of the AC source to be processed when the current to be processed is a three-phase AC current.
10. A three-phase AC / DC compatible input control device, characterized in that, Includes the three-phase AC / DC compatible input control circuit according to any one of claims 1-9.