CN115664231A - Rectification circuit comprising full-wave rectification power module and adjusting method thereof - Google Patents

Rectification circuit comprising full-wave rectification power module and adjusting method thereof Download PDF

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CN115664231A
CN115664231A CN202211353076.3A CN202211353076A CN115664231A CN 115664231 A CN115664231 A CN 115664231A CN 202211353076 A CN202211353076 A CN 202211353076A CN 115664231 A CN115664231 A CN 115664231A
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power module
diode
inductor
port
series branch
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杨益平
陈怡�
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Hangzhou Yunshi Iot Technology Co ltd
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Hangzhou Yunshi Iot Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A rectification circuit including a full-wave rectification power module and a regulation method thereof are disclosed. The rectifier circuit comprises at least 1 complete power module, at least 1 simplified power module and at least 1 additional module, wherein the complete power module can independently complete electric energy conversion, and the simplified power module and the complete power module cooperatively work through the additional module. Compared with the prior art, the output characteristic of the rectifier circuit provided by the embodiment of the invention has more adjustability, and the applicable output characteristic adjusting means is more diversified.

Description

Rectifying circuit comprising full-wave rectifying power module and adjusting method thereof
Technical Field
The invention relates to a rectifier circuit, in particular to a rectifier circuit with multiple input sources.
Background
The rectifier circuit is a circuit capable of converting Alternating Current (AC) into Direct Current (DC), and is widely applied to industries such as electric power, traffic, metallurgy, petroleum, chemical engineering and the like. The full-wave rectification circuit is a common rectification circuit and is mainly characterized in that: the secondary winding of the transformer needs a central tap to be led out, and the number of required rectifying devices is small.
With the development of new energy power generation technology, alternating current power supplies are diversified, and include wind power, photo-thermal, tidal and hydrogen power generator sets and the like besides traditional thermal power, hydraulic power and nuclear power generator sets. The multi-input source rectifying circuit has the capability of comprehensively utilizing various alternating current power supplies. At present, most of common rectifying circuits with multiple input sources adopt a 'single-phase multiple' form. That is, the multi-input source rectifying circuit is composed of a plurality of identical and independent single-input source sub-rectifying circuits, and the input ends of the sub-rectifying circuits are independent while the output ends thereof are connected in parallel.
Disclosure of Invention
The single-phase multiple rectifying circuit has simple structure, each sub-rectifying circuit works independently and only presents a simple decoupling working relation. However, the feature of "the sub-rectification circuits are identical in structure and independent in operation" sacrifices the possibility of the sub-rectification circuits working in cooperation with each other and simplifying the circuit.
In order to overcome the defects that the sub-rectification circuits in the existing single-phase multiple rectification circuit lack of cooperative work and the circuit simplification requirement, the invention provides a rectification circuit comprising a full-wave rectification power module, and further comprises an adjusting method, so that the performance of the rectification circuit is further improved.
The rectification circuit comprising the full-wave rectification power module comprises a complete power module, a simplified power module and an additional module. Wherein the complete power module comprises: two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module; a first diode having a cathode connected to the first intermediate port of the full power module and an anode for connection to the negative terminal of the dc bus or to the second terminal of the load; a second diode having a cathode connected to the second intermediate port of the complete power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load; and a series branch having a third diode and a first inductor, a current input terminal of which is connected to the third intermediate port of the complete power module, and a current output terminal of which is adapted to be connected to the positive terminal of the dc bus or the first terminal of the load. The simplified power module includes: and two ports and a middle tap of a primary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module, and the third middle port is used for being connected with the positive end of the direct current bus or the first end of the load. The additional module comprises at least one inductor and diode series branch, wherein: and the current input end of the inductor and diode series branch is connected with any middle port of the complete power module, and the current output end of the inductor and diode series branch is connected with the first middle port or the second middle port of the simplified power module.
The embodiment of the invention also provides a rectifying circuit comprising the full-wave rectifying power module, which comprises a complete power module, a simplified power module and an additional module. Wherein the complete power module comprises: two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module; a first diode, the cathode of which is connected to the first intermediate port of the full power module, and the anode of which is used to connect to the negative terminal of the dc bus or the second terminal of the load; a second diode having a cathode connected to the second intermediate port of the complete power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load; and a series branch having a third diode and a first inductor, a current input terminal of which is connected to the third intermediate port of the complete power module, and a current output terminal of which is adapted to be connected to the positive terminal of the dc bus or the first terminal of the load. The simplified power module includes: two ports and middle taps of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module; a fourth diode, the cathode of which is connected to the first intermediate port of the simplified power module, and the anode of which is used to connect to the negative terminal of the dc bus or the second terminal of the load; and a fifth diode having a cathode connected to the second intermediate port of the simplified power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load. The additional module comprises at least one inductor and diode series branch, wherein: and the current input end of the inductor and diode series branch is connected with any intermediate port of the simplified power module, and the current output end of the inductor and diode series branch is connected with the first intermediate port or the second intermediate port of the complete power module.
The embodiment of the invention further provides a rectifying circuit comprising a full-wave rectifying power module, which comprises a complete power module, a simplified power module and an additional module. Wherein the complete power module comprises: two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module; the anode of the first diode is connected with the first middle port of the complete power module, and the cathode of the first diode is used for being connected with the positive end of the direct current bus or the first end of the load; the anode of the second diode is connected with the second middle port of the complete power module, and the cathode of the second diode is used for being connected with the positive end of the direct current bus or the first end of the load; and the series branch circuit is provided with a third diode and a first inductor, the current output end of the series branch circuit is connected with a third middle port of the complete power module, and the current input end of the series branch circuit is connected with the negative end of the direct current bus or the second end of the load. The simplified power module includes: and two ports and a middle tap of a primary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module, and the third middle port is connected with a negative end of the direct current bus or a second end of the load. The additional module comprises at least one inductor and diode series branch, wherein: and the current output end of the inductor and the diode are connected with any one middle port of the complete power module in series, and the current input end of the inductor and the diode is connected with the first middle port or the second middle port of the simplified power module.
The embodiment of the invention also provides a rectifying circuit comprising a full-wave rectifying power module, which comprises a complete power module, a simplified power module and an additional module. Wherein the complete power module comprises: two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module; the anode of the first diode is connected with the first middle port of the complete power module, and the cathode of the first diode is used for being connected with the positive end of the direct current bus or the first end of the load; the anode of the second diode is connected with the second middle port of the complete power module, and the cathode of the second diode is used for being connected with the positive end of the direct current bus or the first end of the load; and a series branch having a third diode and a first inductor, a current output terminal of which is connected to a third intermediate port of the complete power module, and a current input terminal of which is connected to a negative terminal of the dc bus or a second terminal of the load. The simplified power module includes: two ports and middle taps of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module; the anode of the fourth diode is connected with the first middle port of the simplified power module, and the cathode of the fourth diode is used for being connected with the positive end of the direct current bus or the first end of the load; and a fifth diode having an anode connected to the second intermediate port of the simplified power module and a cathode for connection to the positive terminal of the dc bus or the first terminal of the load. The add-on module comprises at least one inductor and diode series branch, wherein: and the current output end of the inductor and the diode are connected with any middle port of the simplified power module, and the current input end of the inductor and the diode are connected with the first middle port or the second middle port of the complete power module.
Based on the above structure, there are at least 4 combinations of "1 full power module +1 simplified power module +1 additional module", which are the most basic units of the rectifier circuit including the full-wave rectified power module. On the basis of the most basic unit, a composite structure of a plurality of complete power modules + a plurality of simplified power modules + a plurality of additional modules can be further realized, and the composite structure comprises a combination of 1 complete power module connected with the plurality of additional modules, 1 simplified power module connected with the plurality of additional modules and different most basic units.
In some embodiments, some or all of the diodes in the aforementioned rectifying circuit may be replaced by controllable switching devices (e.g., synchronous rectifier MOSFETs). The alternating current power supply connected with the complete power module can be a multi-level alternating current power supply with three levels or more, including a sine alternating current power supply. The alternating current power supply connected with the simplified power module can be a multi-level alternating current power supply with two or more levels, including a sine alternating current power supply.
The embodiment of the invention also provides an adjusting method applicable to the rectifying circuit, which comprises the following steps of any combination:
step 0: changing the connection mode of the additional module and the complete power module or/and the simplified power module;
step 1: increasing or decreasing the number of additional modules;
step 2: increasing or decreasing the number of series branches of the inductor and the diode inside the additional module;
and step 3: changing the inductance value of the internal inductor of the additional module;
and 4, step 4: changing an operating parameter, such as amplitude, frequency, period, phase, level value, pulse width, etc., of a first ac power source connected to the complete power module;
and 5: the operating parameters, such as amplitude, frequency, period, phase, level value, pulse width, etc., of the second ac power source connected to the simplified power module are varied.
The invention has the following beneficial effects: compared with the existing single-phase multiple rectification circuit, the rectification circuit comprising the full-wave rectification power module comprises the complete power module, the simplified power module and the additional module, wherein the complete power module can independently complete electric energy conversion, the simplified power module combines the complete power module through the additional module to complete electric energy conversion, and current flows between the complete power module and the simplified power module. The structure enables the adjusting means of the whole rectifying circuit to be more diversified, namely, the output characteristic of the rectifying circuit can be changed by changing the connecting mode of the additional modules, changing the number of the internal inductors of the additional modules and the number of the diode series branches, changing the inductance values of the inductors in the inductors and the diode series branches and changing the working parameters of the alternating current power supply, and the adjustability of the rectifying circuit is improved.
Drawings
Fig. 1 is a circuit diagram of embodiment 1 of the present invention.
Fig. 2 is an output power characteristic diagram of embodiment 1 of the present invention.
Fig. 3 is a circuit diagram of embodiment 2 of the present invention.
Fig. 4 is a circuit diagram of embodiment 3 of the present invention.
Fig. 5 is an output power characteristic diagram of embodiment 3 of the present invention.
Fig. 6 is an output current ripple characteristic diagram of embodiment 3 of the present invention.
Fig. 7 is a circuit diagram of embodiment 4 of the present invention.
Fig. 8 is an output power characteristic diagram of embodiment 4 of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by those of ordinary skill in the art that these specific details are not required in order to practice the present invention. In other instances, well-known circuits, materials, or methods have not been described in detail in order to avoid obscuring the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the figures provided herein are for illustrative purposes, and wherein like reference numerals refer to like elements throughout. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present.
Example 1
Referring to fig. 1, a rectifier circuit including a full-wave rectified power module includes at least 1 full power module, at least 1 simplified power module, and at least 1 additional module. In some embodiments, the rectifier circuit includes a plurality of full power modules, a plurality of simplified power modules, and a plurality of additional modules, and the full power modules, the simplified power modules, and the additional modules may have the same structure or different structures, respectively.
Wherein, 1 complete power module is M1,1 simplified power module is S1, and 1 additional module is J1. The rectifying circuit has a first AC power supply v connected thereto AC1 Is connected to a second alternating current power supply v ac1 And an output port connected to a dc bus or load.
The complete power module M1 comprises a transformer T 1A Inductor L 1A Diode D 1A Diode D 1B And a diode D 1C . Transformer T 1A Two ports of primary winding and AC power supply v AC1 2 ports and middle taps of the secondary winding of the transformer are respectively a first middle port 1_A, a second middle port 1 _Band a third middle port 1_C; diode D 1A Its cathode is connected to the first intermediate port 1_A and its anode is connected to the negative terminal V of the DC bus o - Or a second end of the load; diode D 1B Its cathode is connected to the second intermediate port 1_B and its anode is connected to the negative terminal V of the DC bus o - Or a second end of the load; diode D 1C And an inductance L 1A The current input end of the series branch is connected with the third middle port 1 \ u C, and the current output end of the series branch is connected with the positive end V of the direct current bus o + Or the first end of the load.
The simplified power module S1 comprises a transformer T 1a . Transformer T 1a Two ports of primary winding and AC power supply v ac1 Connected with each other, and the 2 ports and the middle taps of the secondary windings are respectively a first middle port 1_a, a second middle port 1 _ub and a third middle portPort 1 'u c, its third intermediate port 1' u c and the positive end V of the dc bus o + Or the first end of the load.
The additional module J1 comprises 2 inductor and diode series branches: first inductor and diode series branch routing inductor L a1 And a diode D a1 Formed by series connection of an inductor L a1 Is connected to the third intermediate port 1 \ u c of the complete power module M1, and an inductance L a1 Another terminal of (D) and diode D a1 Is connected to the anode of a diode D a1 Is connected to a first intermediate port 1_aof the reduced power module S1; second inductor and diode series branch routing inductor L b1 And a diode D b1 Formed in series, inductance L b1 Is connected to the third intermediate port 1 \ u c of the complete power module M1, the inductance L b1 Another terminal of (D) and diode D b1 Is connected to the anode of diode D b1 Is connected to a second intermediate port 1_b of the reduced power module S1. In addition to defining the direction of the current, the diodes also function to prevent circulating currents when the number of series branches of inductors and diodes is greater than 1. The number of series branches of the inductor and the diode in the J1 can be changed, and the change range is 0 to 2.
For ease of understanding, fig. 1 shows only a portion of the overall rectifier circuit including the full wave rectified power module-the complete power module M1, the simplified power module S1 and the additional module J1. Taking the part shown in fig. 1 as an example, the steady-state operation process of the cooperative work of the complete power module, the simplified power module and the additional module is mainly described. When the complete power module works independently, it is a typical full-wave rectification working process, so it is not described again.
For simplicity, it is assumed that the complete power module M1 and the simplified power module S1 employ the same components, the transformer T 1A The first port of the primary winding (e.g. to an AC power source v) AC1 Positive terminal) is in end-of-identity relationship with the first port 1 \ u a of its secondary winding, transformer T 1a The first port of the primary winding (e.g. to an AC power source v) ac1 Positive terminal) is in homonymous end relationship with the first port 1_aof the secondary winding, and T is taken 1A The middle tap of the secondary winding is a center tapTaking T 1a The middle tap of the secondary winding is a center tap. AC power supply v connected to a complete power module M1 AC1 Is a three-level AC power supply (+ V) AC1 、0、-V AC1 ) An AC power supply v connected to the simplified power module S1 ac1 Is a two-level alternating current power supply (+ A.V) AC1 、-A·V AC1 ) And A is a constant. By 0<A<1 is an example and will be described. One working period T of the circuit shown in FIG. 1 1 There are 4 phases, and a typical operation is as follows:
(1) Stage 1: v. of AC1 ＝+V AC1 ，v ac1 ＝+A·V AC1
In the full power module M1: d 1B And D 1C On, D 1A Cut-off, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus or load, D 1B Forming a 1 st loop;
in the additional module J1: d a1 And D b1 Conducting, (b) v AC1 Warp beam T 1A 、v ac1 Warp beam T 1a And L a1 、D a1 DC bus or load, D 1B Forming a 2 nd loop; (c) v. of AC1 Warp beam T 1A 、v ac1 Warp beam T 1a And L b1 、D b1 DC bus or load, D 1B Constituting the 3 rd loop.
(2) And (2) stage: v. of AC1 ＝0，v ac1 ＝+A·V AC1
At this time, T 1A The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 1A And D 1B Conducting, (a) D 1C Is conducted until L 1A 、D 1C DC bus or load, D 1A 、D 1B Current i in the 1 st loop formed D1C Is zero, during a period of D 1A And D 1B Share in common i D1C ；
In the additional module J1: d b1 Conducting, (b) v ac1 Warp beam T 1a And L b1 、D b1 DC bus or load, D 1A 、D 1B Form a composition2 nd loop during which D 1A And D 1B Sharing the current i of the second inductor and the diode series branch b1 ；(c)D a1 Is conducted until the voltage is from v ac1 Warp beam T 1a And L a1 、D a1 DC bus or load, D 1A 、D 1B The current in the 3 rd loop is zero, and the period is D 1A And D 1B Sharing the first inductor and the diode series branch current i together a1 。
(3) And (3) stage: v. of AC1 ＝-V AC1 ，v ac1 ＝-A·V AC1
In the full power module M1: d 1A And D 1C On, D 1B Cut-off, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus or load, D 1A Forming a 1 st loop;
in the additional module J1: d a1 And D b1 Conducting, (b) v AC1 Warp beam T 1A 、v ac1 Warp beam T 1a And L a1 、D a1 DC bus or load, D 1A Forming a 2 nd loop; (c) v. of AC1 Warp beam T 1A 、v ac1 Warp beam T 1a And L b1 、D b1 DC bus or load, D 1A Constituting the 3 rd loop.
(4) And (2) stage: v. of AC1 ＝0，v ac1 ＝-A·V AC1
At this time, T 1A The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 1A And D 1B Conducting, (a) D 1C Is conducted until L 1A 、D 1C DC bus or load, D 1A 、D 1B Current i in loop 1 D1C Is zero, during a period of D 1A And D 1B Share in common i D1C ；
In the additional module J1: d a1 Conducting, (b) v ac1 Warp beam T 1a And L a1 、D a1 DC bus or load, D 1A 、D 1B Form the 2 nd loop during which the time period is D 1A And D 1B Sharing the first inductor and the diode series branch current i a1 ；(c)D b1 Is conducted until the voltage is from v ac1 Warp beam T 1a And L b1 、D b1 DC bus or load, D 1A 、D 1B The current in the 3 rd loop is zero, and the period is D 1A And D 1B Sharing the current i of the second inductor and the diode series branch b1 。
As can be seen from the above operation process, the complete power module M1 can operate independently, but the simplified power module S1 needs to be added by the additional module J1 to participate in the electric energy conversion operation. Because the secondary winding of the transformer is provided with a center tap, and the series branch of the inductor and the diode also limits the current direction, the alternating current power supply can not only provide electric energy, but also absorb the electric energy. This operating characteristic can be utilized to smooth the output power of the entire rectifier circuit.
The working process of the J1 with the number of the series branches of the inductor and the diode being 1 is similar to that described above and will not be described again. To facilitate understanding of the effect of the additional module J1 on the output characteristics (mainly the output power) of the rectifier circuit including the full-wave rectified power module as a whole, it is assumed that: v AC1 ＝20V，v AC1 Period T of 1 ＝90μs，v AC1 Of (c) + V AC1 Pulse width of T 1 /4，v AC1 Of (a) to (V) AC1 Pulse width also being T 1 /4，v ac1 Is (a) is (V) AC1 Pulse width of T 1 /2，v ac1 Is a.V AC1 Pulse width also T 1 /2，T 1A And T 1a The original secondary side turn ratio is 1, the coupling coefficient is 0.999, and the direct current bus voltage V is o =20V. Take 3 cases for further explanation. Case 1: a =0.5; case 2: a =0.75; case 3: a =1.
Get L 1A ＝300μH、L a1 ＝L b1 =500 muh, fig. 2 shows an output power behavior of example 1 of the present invention in the above 3 cases. As can be seen from fig. 2, (i) the presence and absence of the additional module J1 (corresponding to the case where the number of its internal inductors and diode series branches is 0) has an effect on the output power of example 1; (ii) when the additional module J1 is present, its internal inductance and the number of diode series branches have an influence on the output power of embodiment 1; (iii) v. of AC1 And v ac1 The amplitude difference or level difference of (a) also has an influence on the output power of embodiment 1.
Furthermore, the person skilled in the art knows by analysis: the inductance of the inductor inside the additional module also has an influence on the output characteristics (including output power and output current ripple) of the whole rectifier circuit including the full-wave rectification power module. For reasons of space, no further description is given.
The current input terminal of the inductor and diode series branch of J1, in addition to being connected to the third intermediate port 1_c of M1, can also be connected to the first intermediate port 1 _aor the second intermediate port 1 _bof M1, while the current output terminal is connected to the first intermediate port 1 _aor the second intermediate port 1 _bof S1, which are similar in their operation and will not be described again. The number and connection mode of the series branches of the inductors and the diodes can be set according to specific application requirements. For example, the first intermediate port 1 _aand the second intermediate port 1 _bof S1 may be connected to each intermediate port of M1 through an inductive and diode series branch, respectively, when the number of series branches is up to 6.
With the above features, the adjustment method of embodiment 1 is applicable, and the steps may include:
step 0: changing the connection of the add-on module to the complete power module or/and to the simplified power module (1 _A, 1_B, 1 _Cor/and 1_a, 1 _boptional);
step 1: increasing or decreasing the number of additional modules J1 (0 to 1);
step 2: increasing or decreasing the number of additional module internal inductance and diode series branches (0 to 6);
step 3: changing the inductance (L) of the inductance inside the add-on module a1 And/or L b1 )；
Step 4: varying the AC power supply v connected to the complete power module M1 AC1 Amplitude or level value (V) AC1 )；
Step 5: changing the AC power supply v connected to the reduced power module S1 ac1 Amplitude or level value (a x V) AC1 )。
Example 2
Referring to fig. 3, a rectifier circuit including a full-wave rectified power module includes at least 1 full power module, at least 1 simplified power module, and at least 1 additional module. Wherein, 1 complete power module is M1,1 simplified power module is S1, and 1 additional module is J1.
The complete power module M1 comprises a transformer T 2A Inductor L 2A Diode D 2A Diode D 2B And a diode D 2C . Transformer T 2A Two ports of the primary winding of the transformer and an alternating current power supply v AC1 The two secondary windings are connected, and 2 ports and middle taps of the secondary windings are respectively a first middle port 1_A, a second middle port 1 _Band a third middle port 1 _UC; diode D 2A Its anode is connected to the first intermediate port 1_A and its cathode is connected to the positive terminal V of the DC bus o + Or the first end of the load is connected; diode D 2B Its anode is connected to the second intermediate port 1_B and its cathode is connected to the positive terminal V of the DC bus o + Or the first end of the load is connected; diode D 2C And an inductance L 2A The current output end of the series branch is connected with the third middle port 1 \ u C, and the current input end of the series branch is connected with the negative end V of the direct current bus o - Or the second end of the load.
The simplified power module S1 comprises a transformer T 2a . Transformer T 2a Two ports of the primary winding of the transformer and an alternating current power supply v ac1 Connected with 2 ports and intermediate taps of the secondary winding of the transformer, respectively, a first intermediate port 1_a, a second intermediate port 1 _ub and a third intermediate port 1 _uc, the third intermediate port 1 _uc of which is connected with the negative terminal V of the DC bus o - Or the second end of the load.
The additional module J1 comprises 2 inductor and diode series branches: first inductor and diode series branch routing inductor L a2 And a diode D a2 Formed by series connection of an inductor L a2 Is connected to the third intermediate port 1 \ u c of the complete power module M1, and an inductance L a2 Another terminal of (1) and a diode D a2 Of the cathode phaseA diode D a2 Is connected to a first intermediate port 1 \ u a of the reduced power module S1; second inductor and diode series branch routing inductor L b2 And a diode D b2 Formed in series, inductance L b2 Is connected to the third intermediate port 1 \ u c of the complete power module M1, the inductance L b2 Another terminal of (D) and diode D b2 Is connected to the cathode of diode D b2 Is connected to a second intermediate port 1 \ u b of the reduced power module S1. In addition to defining the direction of the current, the diodes also function to prevent circulating currents when the number of series branches of inductors and diodes is greater than 1. The number of series branches of the inductor and the diode in the J1 can be changed, and the change range is 0 to 2.
The current output of the series inductor and diode branch in J1 may be connected to the first intermediate port 1_a or the second intermediate port 1 _ub of M1 in addition to the third intermediate port 1 _uc of M1.
Structurally, example 2 and example 1 are in reciprocal relationship. Except that the directions of partial currents are opposite, the working principle and the effect of the embodiment 2 are similar to those of the embodiment 1, and the adjustment methods suitable for the working principle and the effect are the same, so that the description is omitted.
Example 3
Referring to fig. 4, a rectifier circuit including a full-wave rectified power module includes at least 1 full power module, at least 1 simplified power module, and at least 1 additional module. Wherein, 1 complete power module is M1,1 simplified power module is S1, and 1 additional module is J1.
The simplified power module S1 comprises a transformer T 3a Diode D 3a And a diode D 3b . Transformer T 3a Two ports of its primary winding and AC power supply v ac1 The two secondary windings are connected, and 2 ports and intermediate taps of the secondary windings are respectively a first intermediate port 1_a, a second intermediate port 1 _band a third intermediate port 1 _uc; diode D 3a The anode of which is connected to the first intermediate port 1 \ u a and the cathode of which is connected to the positive terminal V of the dc bus o + Or the first end of the load is connected; diode D 3b The anode of which is connected to the second intermediate port 1' b and the cathode of which is connected to the positive terminal V of the dc bus o + Or the first end of the load.
The additional module J1 comprises 2 inductor and diode series branches: first inductor and diode series branch routing inductor L a3 And a diode D a3 Formed by series connection of an inductor L a3 Is connected to the first intermediate port 1 v of M1, and an inductor L a3 Another terminal of (1) and a diode D a3 Is connected to the anode of a diode D a3 Is connected to the third intermediate port 1 \ u c of S1; second inductor and diode series branch routing inductor L b3 And a diode D b3 Formed in series, inductance L b3 Is connected to a second intermediate port 1 \ u B of M1, an inductance L b3 Another terminal of (1) and a diode D b3 Is connected to the anode of a diode D b3 Is connected to the third intermediate port 1 \ u c of S1. In addition to defining the direction of the current, the diodes also function to prevent circulating currents when the number of series branches of inductors and diodes is greater than 1. The number of series branches of the inductor and the diode in the J1 can be changed, and the change range is 0 to 2.
The rest of the structure is the same as in example 2.
For ease of understanding, fig. 4 shows only a portion of embodiment 3 — the complete power module M1, the simplified power module S1, and the additional module J1. Taking the portion shown in fig. 4 as an example, the steady-state operation process of the cooperative work of the complete power module, the simplified power module and the additional module is mainly described. When the complete power module works independently, it is a typical full-wave rectification working process, so it is not described again.
For simplicity, it is assumed that the complete power module M1 and the simplified power module S1 employ the same components, the transformer T 2A The first port of the primary winding is in homonymous end relationship with the first port 1A of the secondary winding, and the transformer T 3a The first port of the primary winding and the first port 1_aof the secondary winding are in homonymy end relationship, and T is taken 2A Taking the middle tap of the secondary winding as the center tap, and taking T 3a The middle tap of the secondary winding is a center tap. AC power supply v connected to a complete power module M1 AC1 Is a three-level AC power supply (+ V) AC1 、0、-V AC1 ) And simplifying workAC power supply v connected with power module S1 ac1 (t)＝v AC1 (a.t), i.e. v AC1 And v ac1 The amplitude or level values, the phases, the pulse width ratios are the same, but the frequencies and periods are different. The example is a = 2. One working period T of the circuit shown in FIG. 4 1 It can be divided into 8 stages, and a typical working condition is as follows:
(1) Stage 1: v. of AC1 ＝+V AC1 &v ac1 ＝+V AC1
In the full power module M1: d 2A And D 2C On, D 2B Cutoff, (a) v AC1 Warp beam T 2A And D 2A DC bus and load, D 2C 、L 2A Forming a 1 st loop;
in the simplified power module S1: d 3a On, D 3b Cutting off;
in the additional module J1: d a3 And D b3 Conducting, (b) v AC1 Warp beam T 2A 、v ac1 Warp beam T 3a And L a3 、D a3 、D 3a DC bus or load, D 2C 、L 2A Forming a 2 nd loop; (c) v. of AC1 Warp beam T 2A 、v ac1 Warp beam T 3a And L b3 、D b3 、D 3a DC bus or load, D 2C 、L 2A Forming the 3 rd loop.
(2) And (2) stage: v. of AC1 ＝+V AC1 &v ac1 ＝0
At this time, T 3a The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 2A And D 2C On, D 2B Cutoff, (a) v AC1 Warp beam T 2A And D 2A DC bus or load, D 2C 、L 2A Forming a 1 st loop;
in the simplified power module S1: d 3a And D 3b Conducting;
in the additional module J1: d a3 Conducting, (b) v AC1 Warp beam T 2A And L a3 、D a3 、D 3a And D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 3a And D 3b Sharing together; (c) D b3 Is conducted until the voltage is from v AC1 Warp beam T 2A And L b3 、D b3 、D 3a And D 3b DC bus or load, D 2C 、L 2A The current in the 3 rd loop is zero, during which the current in the 3 rd loop is D 3a And D 3b Sharing the same.
(3) And (3) stage: v. of AC1 ＝0&v ac1 ＝-V AC1
At this time, T 2A The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 2C Conducting, (a) D 2A And D 2B Is conducted until the voltage is increased from L 2A 、D 2A 、D 2B DC bus or load, D 2C The current in the 1 st loop is zero, during which the current in the 1 st loop is represented by D 2A And D 2B Sharing together;
in the simplified power module S1: d 3b On, D 3a Cutting off;
in the additional module J1: d a3 And D b3 Conducting, (b) v ac1 Warp beam T 3a And L a3 、D a3 、D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop; (c) v. of ac1 Warp beam T 3a And L b3 、D b3 、D 3b DC bus or load, D 2C 、L 2A Constituting the 3 rd loop.
(4) And (4) stage: v. of AC1 ＝0&v ac1 ＝0
At this time, T 2A And T 3a All the secondary sides of (a) are equivalent to short circuits;
in the full power module M1: d 2C On, D 2A And D 2B All are cut off;
in the simplified power module S1: d 3a And D 3b Conducting;
in the additional module J1: d a3 And D b3 Conducting, (a) L a3 、D a3 、D 3a 、D 3b DC bus or load, D 2C 、L 2A Forming a 1 st loop, during which the current in the 1 st loop is represented by D 3a And D 3b Sharing together; (b) L is b3 、D b3 、D 3a 、D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 3a And D 3b Sharing the same.
(5) And (5) stage: v. of AC1 ＝-V AC1 &v ac1 ＝+V AC1
In the full power module M1: d 2B And D 2C On, D 2A Cut-off, (a) v AC1 Warp beam T 2A And D 2B DC bus or load, D 2C 、L 2A Forming a 1 st loop;
in the simplified power module S1: d 3a On, D 3b Cutting off;
in the additional module J1: d a3 And D b3 Conducting, (b) v AC1 Warp beam T 2A 、v ac1 Warp beam T 3a And L a3 、D a3 、D 3a DC bus or load, D 2C 、L 2A Forming a 2 nd loop; (c) v. of AC1 Warp beam T 2A 、v ac1 Warp beam T 3a And L b3 、D b3 、D 3a DC bus or load, D 2C 、L 2A And forming a 3 rd loop.
(6) And (6) stage: v. of AC1 ＝-V AC1 &v ac1 ＝0
At this time, T 3a The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 2B And D 2C On, D 2A Cut-off, (a) v AC1 Warp beam T 2A And D 2B DC bus or load, D 2C 、L 2A Forming a 1 st loop;
in the simplified power module S1: d 3a And D 3b Conducting;
in the additional module J1: d b3 Conducting, (b) v AC1 Warp beam T 2A And L b3 、D b3 、D 3a And D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 3a And D 3b Sharing together; (c) D a3 Is conducted until the voltage is from v AC1 Warp beam T 2A And L a3 、D a3 、D 3a And D 3b DC bus or load, D 2C 、L 2A The current in the 3 rd loop is zero, during which the current in the 3 rd loop is D 3a And D 3b Sharing the same.
(7) And (7) stage: v. of AC1 ＝0&v ac1 ＝-V AC1
At this time, T 2A The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 2C Conducting, (a) D 2A 、D 2B Is conducted until the voltage is increased from L 2A 、D 2A 、D 2B DC bus or load, D 2C The current in the 1 st loop is zero, during which the current in the 1 st loop is D 2A And D 2B Sharing together;
in the simplified power module S1: d 3b On, D 3a Cutting off;
in the additional module J1: d a3 And D b3 Conducting, (b) v ac1 Warp beam T 3a And L a3 、D a3 、D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop; (c) v. of ac1 Warp beam T 3a And L b3 、D b3 、D 3b DC bus or load, D 2C 、L 2A Constituting the 3 rd loop.
(8) And (8): v. of AC1 ＝0&v ac1 ＝0
At this time, T 2A And T 3a All the secondary sides of (a) are equivalent to short circuits;
in the full power module M1: d 2C On, D 2A And D 2B All are cut off;
in the simplified power module S1: d 3a And D 3b Conducting;
in the additional module J1: d a3 And D b3 Conducting, (a) L a3 、D a3 、D 3a 、D 3b DC bus or load, D 2C 、L 2A Forming a 1 st loop, during which the current in the 1 st loop is represented by D 3a And D 3b Sharing together; (b) L is a radical of an alcohol b3 、D b3 、D 3a 、D 3b DC bus or load, D 2C 、L 2A Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 3a And D 3b Sharing the same.
It can be seen from the above working process that when the complete power module M1, the simplified power module S1 and the additional module J1 work cooperatively, 2 ac power supplies are incorporated into the loop for converting electric energy in a staggered manner or in a superimposed manner. Because the secondary winding of the transformer is provided with a center tap, and the direction of current is limited by the series branch of the inductor and the diode, the alternating current power supply can not only provide electric energy, but also absorb the electric energy. This operating characteristic can be utilized to smooth the output power of the entire rectifier circuit.
The working process of the J1 with the number of the series branches of the inductor and the diode being 1 is similar to that described above, and is not described again. For ease of understanding the effect of the additional module J1 on the output characteristics (mainly output power and output current ripple) of embodiment 3, assume that: v AC1 ＝20V，v AC1 Period T of 1 ＝90μs，v AC1 Is + V AC1 Pulse width of T 1 /4，v AC1 Of (a) to (V) AC1 Pulse width also T 1 /4，T 2A And T 3a The original secondary side turn ratio is 1, the coupling coefficient is 0.999, and the direct current bus voltage V is o =20V. Take 2 cases for further explanation. Case 1: a =2; case 2: a =1.
Get L a3 ＝L b3 ＝L 2A =300 muh, fig. 5 shows an output power behavior of example 3 of the present invention in the above 2 cases, and fig. 6 shows an output current ripple behavior of example 3 of the present invention in the above 2 cases. As can be seen from fig. 5 and 6, (i) the presence and absence of the additional module J1 (corresponding to the case where the number of its internal series branches of inductors and diodes is 0) has an influence on the output power and the output current ripple of example 3; (ii) The number of the series branches of the inductor and the diode inside the additional module J1 has an influence on both the output power and the output current ripple of embodiment 3; (iii) v. of AC1 And v ac1 The frequency difference or period difference of (a) has an influence on the output power of embodiment 3.
In addition, the inductance L inside the additional module J1 a3 And L b3 There is also an effect on the output characteristics (including output power and output current ripple) of example 3.
The current output end of the inductor and diode series branch in J1, in addition to the third intermediate port 1_c of S1, may also be connected to the first intermediate port 1 _aor the second intermediate port 1 _bof S1, while the current input end is connected to the first intermediate port 1 _aor the second intermediate port 1 _bof M1, and their working processes are similar and will not be described again. The number and connection mode of the series branches of the inductor and the diode can be set according to specific application requirements. For example, the first intermediate port 1 _aand the second intermediate port 1 _bof M1 may be connected to each intermediate port of S1 by an inductive and diode series branch, respectively, when the number of series branches is up to 6.
With the above features, the adjustment method of embodiment 3 is applicable, including any combination of the following steps:
step 0: changing the connection of the add-on module to the complete power module or/and to the simplified power module (1 _A, 1 _Bor/and 1_a, 1_b, 1 _coptional);
step 1: increasing or decreasing the number of additional modules J1 (0 to 1);
step 2: increasing or decreasing the number of inductor and diode series branches in the inductor branch module (0 to 6);
step 3: changing the inductance (L) of the inductance inside the add-on module a3 And/or L b3 )；
Step 4: changing the ac power supply v connected to the complete power module M1 AC1 Frequency or period (T) 1 )；
Step 5: changing the AC power supply v connected to the simplified power module S1 ac1 Frequency or period (T) 1 /a)。
Example 4
Referring to fig. 7, a rectifier circuit including a full-wave rectified power module includes at least 1 full power module, at least 1 simplified power module, and at least 1 additional module. Wherein, 1 complete power module is M1,1 simplified power module is S1, and 1 additional module is J1.
The simplified power module S1 comprises a transformer T 4a Diode D 4a And a diode D 4b . Transformer T 4a Two ports of the primary winding of the transformer and an alternating current power supply v ac1 2 ports and intermediate taps of the secondary winding are respectively a first intermediate port 1_a, a second intermediate port 1_b and a third intermediate port 1_c; diode D 4a Its cathode is connected to the first intermediate port 1 \a and its anode is connected to the negative terminal V of the DC bus o - Or a second end of the load; diode D 4b Its cathode is connected to the second intermediate port 1V b and its anode is connected to the negative terminal V of the dc bus o - Or the second end of the load.
The additional module J1 comprises 4 inductor and diode series branches: first inductor and diode series branch routing inductor L a4 And a diode D a4 Formed by series connection of an inductor L a4 Is connected to the first intermediate port 1 \ u A of M1, inductor L a4 Another terminal of (D) and diode D a4 Is connected to the cathode of diode D a4 Is connected to the first intermediate port 1_aof S1; second inductor and diode series branch routing inductor L b4 And a diode D b4 Formed in series, inductance L b4 Is connected to the first intermediate port 1 \ u A of M1, inductor L b4 Another terminal of (D) and diode D b4 Is connected to the cathode of a diode D b4 Is connected to the second intermediate port 1_bof S1; third inductor and diode series branch routing inductor L c4 And a diode D c4 Formed by series connection of an inductor L c4 One end of which is connected to a second intermediate port 1 v b of M1,inductor L c4 Another terminal of (1) and a diode D c4 Is connected to the cathode of a diode D c4 Is connected to the first intermediate port 1 \ ua of S1; fourth inductor and diode series branch routing inductor L d4 And a diode D d4 Formed by series connection of an inductor L d4 One end of which is connected to the second intermediate port 1 v b of M1, inductor L d4 Another terminal of (1) and a diode D d4 Is connected to the cathode of diode D d4 Is connected to the second intermediate port 1 v b of S1. In addition to defining the direction of the current, the diodes also function to prevent circulating currents when the number of series branches of inductors and diodes is greater than 1. The number of series branches of the inductor and the diode in the J1 can be changed, and the change range is 0 to 4.
The rest of the structure is the same as in embodiment 1.
For ease of understanding, fig. 7 shows only a portion of embodiment 4 — the complete power module M1, the simplified power module S1, and the additional module J1. Taking the portion shown in fig. 7 as an example, the steady-state operation process of the cooperative work of the complete power module, the simplified power module and the additional module is mainly described. When the complete power module works independently, the whole power module is a typical full-wave rectification working process, and therefore, the description is omitted.
For simplicity, it is assumed that the complete power module M1 and the simplified power module S1 employ the same components, the transformer T 1A The first port of the primary winding is in homonymous end relationship with the first port 1A of the secondary winding, and the transformer T 4a The first port of the primary winding and the first port 1\ a of the secondary winding are in the same name end relation, and T is taken 1A Taking the middle tap of the secondary winding as the center tap, and taking T 4a The middle tap of the secondary winding is a center tap. AC power supply v connected to a complete power module M1 AC1 Is a three-level AC power supply (+ V) AC1 、0、-V AC1 )，+V AC1 and-V AC1 All have a pulse width of t W An AC power supply v connected to the simplified power module S1 ac1 Also a three-level AC power supply (+ V) AC1 、0、-V AC1 ) But + V AC1 and-V AC1 All have a pulse width of B.t W I.e. v AC1 And v ac1 Amplitude or level valuesThe frequency or period, the phase are all the same, but the pulse width is different. With B<1 is an example and will be described. One working period T of the circuit shown in FIG. 7 1 It can be divided into 6 stages, and a typical working condition is as follows:
(1) Stage 1: v. of AC1 ＝+V AC1 &v ac1 ＝+V AC1
In the full power module M1: d 1B And D 1C On, D 1A Cut-off, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus and load, D 1B Forming a 1 st loop;
simplified power module S1: d 4b On, D 4a Cutting off;
in the additional module J1: d c4 On, D a4 And D d4 Cut-off, (b) v AC1 Warp beam T 1A 、v ac1 Warp beam T 4a And D c4 、L c4 、L 1A 、D 1C DC bus or load, D 4b Forming a 2 nd loop; (c) D b4 Is conducted until the voltage is from v AC1 Warp beam T 1A And D b4 、L b4 、L 1A 、D 1C DC bus or load, D 4b The current in the 3 rd loop is zero.
(2) And (2) stage: v. of AC1 ＝+V AC1 &v ac1 ＝0
At this time, T 4a The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 1B And D 1C On, D 1A Cutoff, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus and load, D 1B Forming a 1 st loop;
in the simplified power module S1: d 4a And D 4b Conducting;
in the additional module J1: d c4 On, D a4 、D b4 And D d4 Cut-off, (b) v AC1 Warp beam T 1A And D c4 、L c4 、L 1A 、D 1C DC bus or load, D 4a 、D 4b Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 4a And D 4b Sharing the same.
(3) And (3) stage: v. of AC1 ＝0&v ac1 ＝0
At this time, T 1A And T 4a All the secondary sides of (a) are equivalent to short circuits;
in the full power module M1: d 1C Conducting, (a) D 1A And D 1B Is conducted until the voltage is increased from L 1A 、D 1C DC bus and load, D 1A 、D 1B The current in the 1 st loop is zero, during which the current in the 1 st loop is D 1A And D 1B Sharing together;
simplified power module S1: d 4a And D 4b Conducting;
in the additional module J1: d c4 On, D a4 、D b4 And D d4 Cut-off, (b) D c4 、L c4 、L 1A 、D 1C DC bus or load, D 4a 、D 4b Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 4a And D 4b Sharing the same.
(4) And (4) stage: v. of AC1 ＝-V AC1 &v ac1 ＝-V AC1
In the full power module M1: d 1A And D 1C On, D 1B Cut-off, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus and load, D 1A Forming a 1 st loop;
in the simplified power module S1: d 4a On, D 4b Cutting off;
in the additional module J1: d b4 On, D a4 And D d4 Cut-off, (b) v AC1 Warp beam T 1A 、v ac1 Warp beam T 4a And D b4 、L b4 、L 1A 、D 1C DC bus or load, D 4a Forming a 2 nd loop; (c) D c4 Is conducted until the voltage is from v AC1 Warp beam T 1A And D c4 、L c4 、L 1A 、D 1C DC bus or load, D 4a The current in the 3 rd loop is zero.
(5) And (5) stage: v. of AC1 ＝-V AC1 &v ac1 ＝0
At this time, T 4a The secondary side of (a) is equivalent to a short circuit;
in the full power module M1: d 1A And D 1C On, D 1B Cut-off, (a) v AC1 Warp beam T 1A And L 1A 、D 1C DC bus and load, D 1A Forming a 1 st loop;
in the simplified power module S1: d 4a And D 4b Conducting;
in the additional module J1: d b4 On, D a4 、D c4 And D d4 Cut-off, (b) v AC1 Warp beam T 1A And D b4 、L b4 、L 1A 、D 1C DC bus or load, D 4a 、D 4b Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 4a And D 4b Sharing the same.
(6) And (6) stage: v. of AC1 ＝0&v ac1 ＝0
At this time, T 1A And T 4a All the secondary sides of (2) are equivalent to short circuits;
in the full power module M1: d 1C Conducting, (a) D 1A And D 1B Is conducted until the voltage is increased from L 1A 、D 1C DC bus and load, D 1A 、D 1B The current in the 1 st loop is zero, and the current in the 1 st loop is D 1A And D 1B Sharing together;
in the simplified power module S1: d 4a And D 4b Conducting;
in the additional module J1: d b4 On, D a4 、D c4 And D d4 Cut-off, (b) D b4 、L b4 、L 1A 、D 1C DC bus or load, D 4a 、D 4b Forming a 2 nd loop, during which the current in the 2 nd loop is represented by D 4a And D 4b Sharing the same.
It can be seen from the above working process that the complete power module M1 can perform electric energy conversion either independently or in cooperation with the simplified power module S1 system. Because the secondary winding of the transformer is provided with a center tap, and the direction of current is limited by the series branch of the inductor and the diode, the alternating current power supply can not only provide electric energy, but also absorb the electric energy. This operating characteristic can be utilized to smooth the output power of the entire rectifier circuit.
The working process of the J1 with the number of the series branches of the inductor and the diode being 1 to 3 is similar to that described above, and is not described again. For the convenience of understanding the influence of the additional module J1 on the output characteristics (mainly output power) of embodiment 4, it is assumed that: v. of AC1 T of (a) W ＝22.5μs，V AC1 ＝20V，v AC1 Period T of 1 ＝90μs，T 1A And T 4a The turn ratio of the primary side to the secondary side is 1 o =20V. Taking 2 cases for further explanation, case 1: b =0.6; case 2: b =1.
Taking L a4 ＝L b4 ＝L c4 ＝L d4 ＝L 1A =300 muh, fig. 8 shows an output power performance of example 4 of the present invention in the above 2 cases. As can be seen from fig. 8, (i) the presence and absence of the additional module J1 (corresponding to the case where the number of its internal inductors and diode series branches is 0) has an effect on the output power of example 4; (ii) When the additional module J1 exists, the number of series branches of the internal inductor and the diode has an influence on the output power of the embodiment 4; (iii) v. of AC1 And v ac1 The pulse width difference of (a) has an influence on the output power of embodiment 4.
In addition, the additional module J1 has an internal inductance L a4 To L d4 The sensitivity of (2) also has an influence on the output characteristics of example 4.
In addition to connecting the first intermediate port 1_a and the second intermediate port 1 _bof S1, the current input terminal of the inductor and diode series branch of J1 may also be connected to the third intermediate port 1 _cof S1, and the current output terminal is connected to the first intermediate port 1 _aor the second intermediate port 1 _bof M1, which have similar operation processes and will not be described again. The number and connection mode of the series branches of the inductors and the diodes can be set according to specific application requirements. For example, based on the embodiment shown in fig. 6, an inductor and a diode series branch may be further provided to connect the third intermediate port 1_c of S1 to the first intermediate port 1 _aand the second intermediate port 1 _bof M1, respectively, where the number of series branches is up to 6.
With the above features, the adjustment method of embodiment 4 is applicable, including any combination of the following steps:
step 0: changing the connection of the add-on module to the complete power module or/and to the simplified power module (1 _A, 1 _Bor/and 1_a, 1_b, 1 _coptional);
step 1: increasing or decreasing the number of additional modules J1 (0 to 1);
step 2: increasing or decreasing the number of inductor and diode series branches in the inductor branch module (0 to 6);
step 3: changing the inductance (L) of the inductance inside the add-on module a4 And/or L b4 And/or L c4 And/or L d4 )；
Step 4: varying the AC power supply v connected to the complete power module M1 AC1 Pulse width (t) of W )；
Step 5: changing the AC power supply v connected to the simplified power module S1 ac1 Pulse width (B x t) of W )。
Although diodes are used for freewheeling and energy transfer on the secondary side of each transformer in the above embodiments, it will be understood by those skilled in the art that the diodes may be replaced by controllable switching devices (e.g., synchronous rectifier MOSFETs). Further, the alternating-current power source in the foregoing embodiments may be an electric power (electronic) device that outputs alternating current, such as AC-AC, DC-AC, or the like; the parameters of the transformer (such as the number of turns of the original secondary side, the excitation inductance, the relation of homonymous terminals and the position of a middle tap) in the complete power module and the simplified power module can be the same or different. The number, the component composition and the component connection mode of the series branches of the inductor and the diode in the additional module can be selected and adjusted according to specific applications. Besides the series connection of the inductor and the diode, the aforementioned series branch of inductors and diodes may additionally comprise other types of elements or combinations of elements, without departing from the scope of the invention. The embodiments described in this specification are merely illustrative of implementation forms of the inventive concept, and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments, but also equivalent technical means that can be conceived by one skilled in the art based on the inventive concept.

Claims (10)

1. A rectifier circuit including a full wave rectified power module, comprising a complete power module, a simplified power module, and an additional module, wherein:
the complete power module includes:
two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module;
a first diode having a cathode connected to the first intermediate port of the full power module and an anode for connection to the negative terminal of the dc bus or to the second terminal of the load;
a second diode having a cathode connected to the second intermediate port of the complete power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load; and
the current input end of the series branch circuit is connected with the third middle port of the complete power module, and the current output end of the series branch circuit is used for being connected with the positive end of the direct current bus or the first end of the load;
the simplified power module includes:
two ports of a primary winding of the second transformer are used for being connected with a second alternating current power supply, two ports and a middle tap of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module, and the third middle port is used for being connected with a positive end of a direct current bus or a first end of a load;
the additional module comprises at least one inductor and diode series branch, wherein:
and the current input end of the inductor and the diode are connected with any one middle port of the complete power module in series, and the current output end of the inductor and the diode is connected with the first middle port or the second middle port of the simplified power module.
2. The full wave rectified power module according to claim 1, wherein said additional module comprises a first inductor and diode series branch and a second inductor and diode series branch, wherein current inputs of said first inductor and diode series branch and said second inductor and diode series branch are connected to a third intermediate port of said complete power module, a current output of said first inductor and diode series branch is connected to a first intermediate port of said simplified power module, and a current output of said second inductor and diode series branch is connected to a second intermediate port of said simplified power module.
3. A rectifier circuit including a full wave rectified power module, comprising a complete power module, a simplified power module, and an additional module, wherein:
the complete power module includes:
two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module;
a first diode, the cathode of which is connected to the first intermediate port of the full power module, and the anode of which is used to connect to the negative terminal of the dc bus or the second terminal of the load;
a second diode having a cathode connected to the second intermediate port of the complete power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load; and
the current input end of the series branch circuit is connected with the third middle port of the complete power module, and the current output end of the series branch circuit is used for being connected with the positive end of the direct current bus or the first end of the load;
the simplified power module includes:
two ports and a middle tap of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module;
a fourth diode, the cathode of which is connected to the first intermediate port of the simplified power module, and the anode of which is used to connect to the negative terminal of the dc bus or the second terminal of the load; and
a fifth diode having a cathode connected to the second intermediate port of the simplified power module and an anode for connection to the negative terminal of the dc bus or the second terminal of the load;
the additional module comprises at least one inductor and diode series branch, wherein:
and the current input end of the inductor and diode series branch is connected with any intermediate port of the simplified power module, and the current output end of the inductor and diode series branch is connected with the first intermediate port or the second intermediate port of the complete power module.
4. A rectification circuit including a full wave rectified power module according to claim 3, wherein said additional module comprises a first inductor and diode series branch, a second inductor and diode series branch, a third inductor and diode series branch, and a fourth inductor and diode series branch, wherein current inputs of the first inductor and diode series branch and the third inductor and diode series branch are connected to a first intermediate port of said simplified power module, wherein current inputs of the second inductor and diode series branch and the fourth inductor and diode series branch are connected to a second intermediate port of said simplified power module, current outputs of the first inductor and diode series branch and the second inductor and diode series branch are connected to a first intermediate port of said full power module, and current outputs of the third inductor and diode series branch and the fourth inductor and diode series branch are connected to a second intermediate port of said full power module.
5. A rectifier circuit comprising a full wave rectified power module, comprising a full power module, a simplified power module and an additional module, wherein:
the complete power module includes:
two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module;
a first diode, the anode of which is connected to the first intermediate port of the complete power module, and the cathode of which is used to connect to the positive terminal of the dc bus or the first terminal of the load;
the anode of the second diode is connected with the second middle port of the complete power module, and the cathode of the second diode is used for being connected with the positive end of the direct current bus or the first end of the load; and
a series branch having a third diode and a first inductor, a current output terminal thereof connected to a third intermediate port of the complete power module, and a current input terminal thereof connected to a negative terminal of the dc bus or a second terminal of the load;
the simplified power module includes:
two ports of a primary winding of the second transformer are used for being connected with a second alternating current power supply, two ports and a middle tap of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module, and the third middle port is connected with a negative end of the direct current bus or a second end of the load;
the additional module comprises at least one inductor and diode series branch, wherein:
and the current output end of the inductor and the diode are connected with any one middle port of the complete power module in series, and the current input end of the inductor and the diode is connected with the first middle port or the second middle port of the simplified power module.
6. The full wave rectified power module according to claim 5, wherein said additional module comprises a first inductor and diode series branch and a second inductor and diode series branch, wherein current outputs of said first inductor and diode series branch and said second inductor and diode series branch are connected to a third intermediate port of said complete power module, a current input of said first inductor and diode series branch is connected to a first intermediate port of said simplified power module, and a current input of said second inductor and diode series branch is connected to a second intermediate port of said simplified power module.
7. A rectifier circuit including a full wave rectified power module, comprising a complete power module, a simplified power module, and an additional module, wherein:
the complete power module includes:
two ports and middle taps of a secondary winding of the first transformer are respectively a first middle port, a second middle port and a third middle port of the complete power module;
a first diode, the anode of which is connected to the first intermediate port of the complete power module, and the cathode of which is used to connect to the positive terminal of the dc bus or the first terminal of the load;
the anode of the second diode is connected with the second middle port of the complete power module, and the cathode of the second diode is used for being connected with the positive end of the direct current bus or the first end of the load; and
a series branch having a third diode and a first inductor, a current output terminal thereof connected to a third intermediate port of the complete power module, and a current input terminal thereof connected to a negative terminal of the dc bus or a second terminal of the load;
the simplified power module includes:
two ports and middle taps of a secondary winding of the second transformer are respectively a first middle port, a second middle port and a third middle port of the simplified power module;
the anode of the fourth diode is connected with the first middle port of the simplified power module, and the cathode of the fourth diode is used for being connected with the positive end of the direct current bus or the first end of the load; and
the anode of the fifth diode is connected with the second middle port of the simplified power module, and the cathode of the fifth diode is used for being connected with the positive end of the direct current bus or the first end of the load;
the add-on module comprises at least one inductor and diode series branch, wherein:
and the current output end of the inductor and the diode are connected with any one middle port of the simplified power module in series, and the current input end of the inductor and the diode is connected with the first middle port or the second middle port of the complete power module.
8. The full wave rectified power module containing rectifier circuit of claim 7, wherein said additional module comprises a first inductor and diode series branch and a second inductor and diode series branch, wherein the current output terminals of the first inductor and diode series branch and the second inductor and diode series branch are connected to the third intermediate port of said simplified power module, the current input terminal of the first inductor and diode series branch is connected to the first intermediate port of said complete power module, and the current input terminal of the second inductor and diode series branch is connected to the second intermediate port of said complete power module.
9. A rectification circuit including a full wave rectified power module according to any one of claims 1 to 8, wherein some or all of the diodes are replaced by controllable switching devices.
10. A regulating method suitable for a rectification circuit comprising a full-wave rectified power module according to any one of claims 1 to 8, comprising any combination of the following steps:
step 0: changing the connection mode of the additional module and the complete power module or/and the simplified power module;
step 1: increasing or decreasing the number of additional modules;
and 2, step: increasing or decreasing the number of series branches of the internal inductor and the diode of the additional module;
and step 3: changing the inductance value of the inductor in the additional module;
and 4, step 4: changing operating parameters of a first AC power source connected to the full power module;
and 5: an operating parameter of a second ac power source connected to the reduced power module is changed.
CN202211353076.3A 2022-10-28 2022-10-28 Rectification circuit comprising full-wave rectification power module and adjusting method thereof Pending CN115664231A (en)

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