DC regulated power supply, control method, control device and storage medium

Abstract

The present application relates to signal generation technology, and discloses a DC regulated power supply, a control method, a control device, and a storage medium. The phase interleaving control drive between multiple transformers staggered in parallel in the DC regulated power supply is realized, and it is ensured that these transformers operate at the same switching frequency, and the conduction time of the voltage output between each other is staggered by a certain time, so as to improve the power density of the DC regulated power supply while improving the power density of the DC regulated power supply in a low-power manner. At the same time, in the transformer, the busbar is used as the winding plate of the top and bottom layers of the rectifier winding, and as a part of the secondary winding, so as to reduce the current density of the rectifier winding, thereby reducing the heat generation of the rectifier winding, so that the power density of the transformer can be made higher while ensuring the safety and stability of the use of the transformer and the DC regulated power supply.

Description

Technical Field

[0001] The present application relates to the field of signal generation technology, and in particular to a direct current regulated power supply, a control method for a direct current regulated power supply, a control device, and a computer-readable storage medium. Background Art

[0002] DC regulated power supplies are based on transformers (such as DC / DC transformers) and can convert input power signals into the required stable power output. In some fields where precision equipment with strict requirements on DC regulated power supplies are used (such as aviation, aerospace, and shipbuilding), there are high requirements for the power density of transformers, that is, DC regulated power supplies are required to provide greater energy in a smaller volume.

[0003] However, the increase in power density will also lead to an increase in the heating of the rectifier winding in the transformer, which in turn affects the safety and stability of the transformer. In other words, excessive heating of the winding is a factor that restricts the increase in transformer power density. Because it is particularly important to avoid excessive heating of the rectifier winding while increasing the power density of the transformer to ensure the safety and stability of the DC regulated power supply.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a DC regulated power supply, a control method for a DC regulated power supply, a control device and a computer-readable storage medium, aiming to improve the power density of the transformer of the DC regulated power supply while reducing the heat generation of the transformer windings to ensure the safety and stability of the transformer.

[0006] To achieve the above-mentioned purpose, the present application provides a DC regulated power supply, including a transformer circuit and a driving circuit; wherein the transformer circuit is provided with a plurality of transformers connected in parallel in an interlaced manner; the driving circuit includes a first power supply end, a square wave generating unit, a first trigger, a second trigger and two driving units, wherein the first power supply end is electrically connected to the power supply ends of the square wave generating unit, the first trigger and the second trigger respectively, and the signal output end of the square wave generating unit is electrically connected to the clock end of the first trigger; the signal output end of the first trigger is electrically connected to the clock end of the second trigger; the two signal output ends of the second trigger are electrically connected to the input ends of the two driving units respectively; the same-frequency signal output ends with a phase difference between the two driving units are respectively used to connect the control ends of the switch tube modules in each of the transformers;

[0007] Among them, the main board of the transformer is a multi-layer circuit board, and a rectifier winding is arranged on the main board, and in the rectifier winding core, the primary winding and the secondary winding are alternately stacked; the top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar and half of the secondary winding are connected in parallel between the voltage output end of the transformer and one of the switch tube modules, and are grounded through the switch tube module; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output end of the transformer and another of the switch tube modules, and are grounded through the switch tube module.

[0008] Optionally, corresponding through holes are provided in the rectifier winding core, the first bus bar, and the second bus bar, a first magnetic core is provided on the first bus bar, and a second magnetic core is provided under the second bus bar; and a raised magnetic strip in the first magnetic core passes through the through hole and contacts the second magnetic core;

[0009] A through slot is also provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is also provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.

[0010] Optionally, the square wave generating unit includes a first resistor, a second resistor, a first capacitor and a timer; wherein, the power supply end of the timer is electrically connected to the first power supply end, the first resistor is externally connected between the power supply end and the discharge end of the timer, the discharge end is also respectively connected to the threshold pin and the trigger end of the timer via the external second resistor, and the trigger end is also grounded via the first capacitor; the signal output end of the timer is the signal output end of the square wave generating unit.

[0011] Optionally, the square wave generating unit also includes a third resistor, a second capacitor and a third capacitor; wherein the third resistor is externally connected between the power supply terminal and the reset terminal of the timer, and the reset terminal is also connected to the reset signal input terminal; the common pin of the timer is also grounded via the second capacitor; and the power supply terminal of the timer is also grounded via the third capacitor.

[0012] Optionally, the power supply terminals of the first trigger and the second trigger are also grounded via a fourth capacitor.

[0013] Optionally, the driving unit includes a fourth resistor, a fifth resistor, a first diode, a second diode, a fifth capacitor, a sixth capacitor, a seventh capacitor and a driver; each signal output end of the second trigger includes a forward output end and a reverse output end;

[0014] Among them, the fourth resistor and the first diode are arranged in parallel between the forward output terminal of the second trigger and the forward input terminal of the driver, and the conduction direction of the first diode is from the forward input terminal of the driver to the forward output terminal of the second trigger; the fifth resistor and the second diode are arranged in parallel between the reverse output terminal of the second trigger and the reverse input terminal of the driver, and the conduction direction of the second diode is from the reverse input terminal of the driver to the reverse output terminal of the second trigger;

[0015] The positive input terminal of the driver is also grounded via a fifth capacitor, and the reverse input terminal of the driver is also grounded via a sixth capacitor; the power supply terminal of the driver is also grounded via a seventh capacitor, and the power supply terminal of the driver is electrically connected to the second power supply terminal;

[0016] The DC voltage input to the second power supply end is greater than the DC voltage input to the first power supply end.

[0017] Optionally, an eighth capacitor is further provided between the voltage output terminal of the transformer and the ground line.

[0018] To achieve the above object, the present application also provides a control method of a DC regulated power supply, which is applied to the above DC regulated power supply. The control method of the DC regulated power supply comprises the following steps:

[0019] Generate a square wave signal of a preset frequency based on a square wave generating unit;

[0020] Based on the first trigger, the square wave signal is converted into a set of two-frequency divided pulse signals with phases staggered by 180°;

[0021] Based on the second trigger, a set of two-frequency divided pulse signals with a phase stagger of 180° is converted into two sets of two-frequency divided pulse signals with a phase stagger of 90°;

[0022] Based on each driving unit, a dead time is added to each group of binary frequency-divided pulse signals with a phase staggered by 90° to generate each group of driving signals respectively and output them to the switch tube module of the corresponding transformer.

[0023] To achieve the above-mentioned purpose, the present application also provides a control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the control method of the DC regulated power supply as described above are implemented.

[0024] To achieve the above objectives, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the DC regulated power supply as described above are implemented.

[0025] The DC regulated power supply, control method, control device and computer-readable storage medium provided by the present application realize the phase interleaving control drive between multiple transformers interleaved in parallel in the DC regulated power supply, and ensure that these transformers work at the same switching frequency, and the conduction time of the voltage output between each other is staggered by a certain time, so as to improve the power density of the DC regulated power supply while realizing the improvement of the power density of the DC regulated power supply in a low-power manner. At the same time, in the transformer, the busbar is used as the winding plate of the top and bottom layers of the rectifier winding, and is used as the secondary winding, so as to reduce the current density of the rectifier winding, thereby reducing the heating of the rectifier winding, so that the power density of the transformer can be made higher while ensuring the safety and stability of the use of the transformer and the DC regulated power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the architecture of a DC regulated power supply in one embodiment of the present application;

[0027] Figure 2 This is a structural exploded diagram of a rectifier winding on a transformer mainboard in one embodiment of the present application;

[0028] Figure 3 A circuit structure diagram related to the winding of a transformer in one embodiment of the present application;

[0029] Figure 4 A waveform diagram of a relevant signal in an embodiment of the present application;

[0030] Figure 5 is another waveform diagram of a related signal in an embodiment of the present application;

[0031] Figure 6 This is a schematic diagram of the structure of a driving circuit in an embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of the structure of a driving unit in one embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of the steps of a control method for a DC regulated power supply in an embodiment of the present application;

[0034] Fig. 9 FIG. 1 is a schematic diagram of the internal structure of a control device according to an embodiment of the present application.

[0035] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] In addition, if the descriptions of "first", "second", etc. are involved in this application, they are only used for descriptive purposes (such as for distinguishing the same or similar features), and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] In one embodiment, a DC regulated power supply is provided, referring to Figures 1 to 3 , the DC regulated power supply includes a transformer circuit and a driving circuit; wherein the transformer circuit is provided with a plurality of transformers connected in parallel in an interlaced manner; the driving circuit includes a first power supply end, a square wave generating unit, a first trigger, a second trigger and two driving units, wherein the first power supply end is electrically connected to the power supply ends of the square wave generating unit, the first trigger and the second trigger respectively, the signal output end of the square wave generating unit is electrically connected to the clock end of the first trigger; the signal output end of the first trigger is electrically connected to the clock end of the second trigger; the two signal output ends of the second trigger are electrically connected to the input ends of the two driving units respectively; the same frequency signal output end with a phase difference between the two driving units is respectively used to connect the control end of the switch tube module Q in each of the transformers;

[0039] Among them, the main board of the transformer is a multi-layer circuit board, and a rectifier winding is provided on the main board, and in the rectifier winding core, the primary winding and the secondary winding are alternately stacked; the top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar and half of the secondary winding are connected in parallel between the voltage output terminal Uo of the transformer and one of the switch tube modules Q, and are grounded through the switch tube module Q; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output terminal Uo of the transformer and another switch tube module Q, and are grounded through the switch tube module Q.

[0040] In this embodiment, the first power supply end is responsible for providing the required electrical energy for the normal operation of the driving circuit; that is, the first power supply end is responsible for providing the electrical energy required for the normal operation of the square wave generating unit, the first trigger and the second trigger, such as 5V DC input.

[0041] Optionally, the square wave generating unit may be constructed based on a timer oscillation circuit to generate a square wave signal of a preset frequency and transmit it to the first trigger.

[0042] Optionally, the preset frequency can be set according to actual needs, such as being set to 1 MHz.

[0043] Optionally, the first trigger and the second trigger are both D-type triggers, and the D-type trigger can use SN74HC74PWT chip. Each trigger can have independent data, set, reset, clock input and phase complementary output terminals.

[0044] Optional, see Figure 4 The first trigger is used to convert the received square wave signal into a set of two-way frequency-divided pulse signals with a phase stagger of 180°, and then transmit it to the second trigger. The second trigger is used to convert the received set of two-way frequency-divided pulse signals with a phase stagger of 180° into two sets of two-way frequency-divided pulse signals with a phase stagger of 90°, and then transmit the converted two sets of signals to the two drive units respectively (that is, each drive unit will receive a set of two-way frequency-divided pulse signals with a phase stagger of 90°).

[0045] The following is an example of generating a square wave signal with a preset frequency of 1MHz and a duty cycle of 0.5:

[0046] When the first trigger is triggered by the rising edge of the clock, the 1MHz square wave signal with a duty cycle of 0.5 is converted into a set of two-frequency pulse signals with a duty cycle of 0.5 and a phase stagger of 180° after logical transformation (the frequency is 500kHz). When the second trigger is triggered by the rising edge of the clock, the one set of two-frequency pulse signals with a duty cycle of 0.5 and a phase stagger of 180° is converted into two sets of two-frequency pulse signals with a duty cycle of 0.5 and a phase stagger of 90° (phase complementary 180°) after logical transformation (the frequency is 250kHz; and the two sets are staggered by 90°, that is, the pulse signals obtained by the two drive units have a phase difference of 90°).

[0047] Optionally, an RC circuit and a driver can be set in the drive unit, see Figure 5 , using the driver threshold voltage V OBy creating a dead zone through the charge and discharge time of the RC circuit, the generated drive signal can maintain the same frequency and a phase difference of 90°, forming a phase-staggered working mode. That is, the drive unit receives a set of two-frequency pulse signals with a phase stagger of 90° (phase complementary 180°), first through the RC circuit for filtering, and then adjusts the time constant of the RC circuit to set the dead zone time T DEAD , so that the driver can convert a set of two-frequency pulse signals after RC filtering into a set of dead time T DEAD The phase of the drive signal is complementary to that of the transistor by 180°, and the driver finally outputs the generated drive signal to the corresponding transformer.

[0048] Among them, the dead time T DEAD It can be set according to actual needs, such as 300ns.

[0049] Optionally, in the transformer circuit, when multiple transformers are staggered in parallel, the adopted topology structure can be Buck, Boost, Buck-Boost, etc., which can be selected according to the specific application scenario and power requirements. That is, the transformer circuit can adopt the existing multiple staggered parallel transformer structure, and each signal output end of each driving unit in the driving circuit can be connected to the control end of the corresponding switch tube module Q of each transformer (such as the gate of the MOS tube in the switch tube module Q).

[0050] Optionally, the multiple transformers may be grouped according to the number of drive units. For example, when the number of drive units is two, the multiple transformers may be divided into two groups, and the transformers in the same group are driven by the same drive unit.

[0051] Optional, see Figure 2 In each transformer, the transformer main board adopts a multi-layer circuit board structure, which can improve the compactness of the transformer and the rectifier winding arranged on the main board, and help to improve the power density. Among them, the multi-layer circuit board can be a thick copper circuit board.

[0052] The rectifier winding is set on the transformer mainboard, and its core is composed of the corresponding copper foil in each layer of the circuit board (that is, the copper foil at the winding setting, and one layer of copper foil can form a winding), and the rectifier winding core includes multiple primary windings and multiple secondary windings ( Figure 3 The figure shows a rectifier winding structure of 6 primary windings + 6 secondary windings; in this case, the multi-layer circuit board structure is composed of 12 layers of circuit boards, and one winding can be set on each layer). In the rectifier winding core, the primary winding and the secondary winding are staggered and stacked. After the rectifier winding core adopts the staggered stacking design, the overall structure is more compact, and a higher power density can be achieved in a limited space, which is suitable for application scenarios with small volume requirements.

[0053] It should be understood that, in addition to the rectifier winding, the transformer mainboard also includes other necessary components of the transformer, such as other components used in conjunction with the rectifier winding.

[0054] The top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar is connected in parallel with half of the secondary windings, so that the first bus bar is also equivalent to being used as one of the secondary windings; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar is connected in parallel with the other half of the secondary windings, so that the second bus bar is also equivalent to being used as one of the secondary windings.

[0055] A bus bar (also called a laminated bus bar) is a multi-layer laminated structure electrical connection component for power modules that can connect the power distribution of multiple circuits.

[0056] For example, Figure 3 As shown, taking the original number of secondary windings of the rectifier winding core as 6 as an example (the number of primary windings is also 6 at this time), 3 secondary windings are connected in parallel with the first bus bar, and the other 3 secondary windings are connected in parallel with the second bus bar (two bus bars plus the original 6 secondary windings can increase the number of secondary windings to 8 in a 12-layer circuit board).

[0057] Among them, the half of the secondary winding connected in parallel with the first bus bar and the other half of the secondary winding connected in parallel with the second bus bar are also arranged in an alternate and stacked manner.

[0058] Optional, see Figure 3 The circuit structure related to the windings in the transformer shown is as follows: the first bus bar and half of the secondary winding are connected in parallel between the voltage output terminal Uo of the transformer and one of the switch tube modules Q, and are grounded through the switch tube module Q; the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output terminal Uo of the transformer and another of the switch tube modules Q, and are grounded through the switch tube module Q. This configuration can achieve current shunting and improve the efficiency of current transmission. Moreover, this parallel design also helps to ensure the voltage stability and reliability between the voltage output terminal Uo and the ground wire GND.

[0059] Optionally, the first bus bar and half of the secondary winding connected in parallel with the first bus bar are defined as a first secondary module, wherein the first secondary module is connected to the ground wire GND via a switch tube module Q, and based on the switch tube module Q, the first secondary module can be controlled to be enabled or not.

[0060] Optionally, the second bus bar and the other half of the secondary winding connected in parallel with the second bus bar are defined as a second secondary module, wherein the second secondary module is connected to the ground wire GND via another switch module Q, and based on the switch module Q, the second secondary module can be controlled to be enabled or not.

[0061] Optionally, each switch tube module Q is provided with at least one MOS tube (not shown in the figure); or, each switch tube module Q is provided with a plurality of MOS tubes (not shown in the figure) connected in parallel.

[0062] Among them, the MOS tube in the switch tube module Q can be controlled by the drive signal output by the above drive circuit (output by the drive unit in the drive circuit) to make the MOS tube in the required on or off state, thereby realizing the control of the circuit (the switch tube module Q in the same transformer is driven by the same drive unit). This design can effectively realize the precise control of the MOS tube, so that it can play a specified function in the circuit.

[0063] It should be understood that the transformer circuit has multiple transformers connected in parallel, and the connection method between any transformer and the drive circuit can be adopted. Figure 3 The connection method between the driving circuit and the switching tube module Q in the transformer is shown.

[0064] Optionally, in the transformer circuit, the switch tube modules Q in the transformers of different groups are controlled and driven by the non-driving unit (i.e., the driving unit in the driving circuit). This ensures that the staggered parallel transformers all operate at the same switching frequency, and the conduction time of the voltage outputs are staggered by a certain time. When N transformers are connected in parallel, the conduction phase difference between each transformer is π / N, which can reduce the total ripple current and voltage and greatly improve the power density and thermal balance of the power module.

[0065] Optionally, based on the above scheme, the driving signals of the switch tube modules Q can be arbitrarily combined to maintain the same frequency and a phase difference of π, π / 2…π / n, forming an open-loop phase-staggered working mode, which can significantly reduce the output ripple voltage and current. At the same time, the ripple frequency is also increased by n times that of a single transformer, and the power density is greatly improved.

[0066] This open-loop phase interleaving operation mode can bring more flexibility and advantages to the system design of DC regulated power supplies, especially in power conversion solutions that require high efficiency and high density. Through detailed phase control and combined drive signal methods, system performance can be further optimized to meet the needs of different application scenarios.

[0067] At the same time, since the busbars in each transformer can be used as secondary windings to effectively disperse the current (i.e., reduce the current density), the heat on the winding plate is reduced, so that the power density of the transformer can be made higher. That is, by setting the first and second busbars on the top and bottom layers of the rectifier winding core respectively, and connecting them in parallel with other secondary windings, the first busbar and the second busbar are actually used as a secondary winding respectively. This design increases the reusability of the rectifier winding, fully utilizes the structural space of the transformer, and improves the overall efficiency and power density of the transformer. This ingenious design ensures that the transformer achieves higher power output in a limited space while maintaining good thermal management and stability.

[0068] In this way, for the same number of layers of circuit boards, the current density of the rectifier winding is smaller and the power density of the transformer is higher. In addition, the first bus bar and the second bus bar are also used as a secondary winding, which can reduce the interlayer thermal resistance of the multi-layer circuit board and improve the heat dissipation performance. This ensures that the transformer achieves more efficient power output within a limited space and maintains good stability and reliability.

[0069] In one embodiment, phase staggered control driving is implemented between multiple transformers staggered in parallel in a DC regulated power supply, and it is ensured that these transformers operate at the same switching frequency and the conduction time of the voltage outputs are staggered by a certain time, so as to effectively reduce the total ripple current and voltage while improving the power density of the DC regulated power supply, thereby reducing the control loss of the corresponding switch tube in the transformer, and further reducing the total control loss of the DC regulated power supply, thereby improving the power density of the DC regulated power supply in a low-power manner.

[0070] At the same time, in each transformer, by using busbars as the winding plates at the top and bottom layers of the rectifier winding and using the busbars as the secondary winding, the current density of the rectifier winding is reduced, thereby reducing the heat generation of the rectifier winding, and reducing the thermal resistance between layers of the multi-layer circuit board, and the heat dissipation performance is better. By reducing the heat generation of the rectifier winding, the power density of the transformer can be made higher, and the safety and stability of the transformer can be guaranteed, thereby ensuring the safety and stability of the DC regulated power supply.

[0071] In one embodiment, based on the above embodiment, referring to Figure 2 , the rectifier winding core, the first bus bar, and the second bus bar are all provided with through holes, a first magnetic core is provided on the first bus bar, and a second magnetic core is provided under the second bus bar; and the protruding magnetic strip in the first magnetic core passes through the through hole and contacts with the second magnetic core;

[0072] A through slot is also provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is also provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.

[0073] In this embodiment, corresponding through holes are provided in the rectifier winding core, the first bus bar, and the second bus bar (the specifications of the through holes in the three may be consistent or inconsistent; for example, the through hole diameters of the first bus bar and the second bus bar may be larger than the through hole diameter of the rectifier winding core to facilitate assembly), a first magnetic core is provided on the first bus bar, and a second magnetic core is provided under the second bus bar; a raised magnetic strip is provided in the first magnetic core, which can pass through the through holes in the first bus bar, the rectifier winding core, and the second bus bar; when the first magnetic core and the second magnetic core are used in combination with the first bus bar, the rectifier winding core, and the second bus bar, the magnetic strip on the first magnetic core passes through the through holes in the first bus bar, the rectifier winding core, and the second bus bar in turn to contact the second magnetic core, and in this way, the first magnetic core and the second magnetic core can achieve mutual magnetic attraction.

[0074] This design is to achieve effective magnetic coupling between the first magnetic core and the second magnetic core. By setting through holes in the first bus bar, the rectifier winding core, and the second bus bar, and designing a raised magnetic strip in the first magnetic core, it is possible to ensure good docking and contact between the first magnetic core and the second magnetic core, and to adsorb each other. This design helps to maximize the transfer of magnetic energy and ensure the efficient operation of the rectifier winding. Moreover, by optimizing the magnetic circuit, the efficiency and performance of the transformer can be improved, while reducing energy loss and heat generation, making the transformer more stable and reliable.

[0075] At the same time, a through slot is arranged on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is designed in the first magnetic core. When the first magnetic core and the second magnetic core are used in combination with the rectifier winding core, the magnetic block on the first magnetic core passes through the through slot and contacts the second magnetic core. The through slot provides an additional contact area, so that the magnetic block contacts the second magnetic core more closely, thereby increasing the transmission efficiency of magnetic energy.

[0076] This not only further enhances the magnetic coupling between the first magnetic core and the second magnetic core, but also allows the first bus bar, the rectifier winding core and the second bus bar to be clamped in the middle by the first magnetic core and the second magnetic core, thereby simplifying the assembly process and facilitating the assembly and fixation of the magnetic core and the rectifier winding core, the first bus bar and the second bus bar.

[0077] Optionally, the second magnetic core is a rectangular magnetic plate.

[0078] In one embodiment, based on the above embodiment, referring to Figure 6, the square wave generating unit comprises a first resistor R1, a second resistor R2, a first capacitor C1 and a timer; wherein, the power supply terminal VCC of the timer is electrically connected to the first power supply terminal, the first resistor R1 is externally connected between the power supply terminal VCC and the discharge terminal DIS of the timer, the discharge terminal DIS (i.e., Disch port) is also connected to the threshold pin TH (i.e., THRES port) and the trigger terminal TR (i.e., Trigger port) of the timer respectively through the external second resistor R2, and the trigger terminal TR is also grounded through the first capacitor C1; the signal output terminal OUT of the timer is the signal output terminal OUT of the square wave generating unit.

[0079] In this embodiment, the frequency and duty cycle of the square wave can be adjusted by controlling the values ​​of the resistor and capacitor using the basic working principle of the timer. In the square wave generating unit, the working frequency of the timer is determined by the first resistor R1 and the first capacitor C1, while the duty cycle is controlled by the second resistor R2. Therefore, by reasonably selecting the values ​​of the resistor and capacitor, the desired square wave output can be achieved.

[0080] Optionally, the first resistor R1 is connected between the power supply terminal VCC and the discharge terminal DIS of the timer, one end of the second resistor R2 is connected to the first resistor R1 and the discharge terminal DIS, and the other end is connected to the threshold pin TH and the trigger terminal TR of the timer (equivalent to the threshold pin TH and the trigger terminal TR being short-circuited). The first capacitor C1 is connected between the trigger terminal TR of the timer and the ground line GND.

[0081] Optionally, by controlling the first capacitor C1 to charge and discharge repeatedly within a preset voltage range, the timer can generate and output a square wave signal of a preset frequency. Assuming that the DC voltage provided by the first power supply terminal is U, the value range of the preset voltage range can be [1 / 3U, 2 / 3U].

[0082] When the square wave generating unit is working, the first capacitor C1 is charged to 2 / 3U through the first resistor R1 and the second resistor R2, and then the output voltage is reversed, so that the first capacitor C1 is discharged to 1 / 3U through the second resistor R2, and then the first capacitor C1 is recharged to 2 / 3U, and then the output voltage is reversed again, and so on and so forth, so that the timer can have the conditions to generate a square wave signal of a preset frequency.

[0083] Optionally, the specific values ​​of the first resistor R1, the second resistor R2 and the first capacitor C1 can be set according to the frequency of the square wave signal to be generated; for example, in order to enable the timer to generate a 1MHz square wave signal, the first resistor R1 can be set to 1KΩ, the second resistor R2 can be set to 500Ω, and the first capacitor C1 can be set to 1µF.

[0084] In one embodiment, based on the above embodiment, referring to Figure 6The square wave generating unit further includes a third resistor R3, a second capacitor C2 and a third capacitor C3; wherein the third resistor R3 is externally connected between the power supply terminal VCC and the reset terminal RE of the timer, and the reset terminal RE is also connected to the reset signal input terminal RST; the common pin CON of the timer is also grounded via the second capacitor C2; the power supply terminal VCC of the timer is also grounded via the third capacitor C3.

[0085] In this embodiment, the third resistor R3 and the reset signal input terminal RST are used to implement the reset function of the timer. When the reset signal input terminal RST receives the reset signal input from the outside, the third resistor R3 controls the reset terminal RE of the timer to remain in the reset state. In the reset state, the timer will be reset, thereby ensuring that the square wave generating unit restarts timing after receiving the reset signal, so as to ensure that the system can accurately reset the state of the square wave signal when needed.

[0086] The presence of the reset function improves the stability and reliability of the system, and plays a key role, especially when it is necessary to respond to external events in a timely manner and reinitialize the square wave generation unit.

[0087] Optionally, the second capacitor C2 is connected between the common pin CON of the timer and the ground line GND, and is used to filter and stabilize the timer.

[0088] Optionally, a third capacitor C3 is connected between the power supply terminal VCC and the ground line GND of the timer to stabilize the input power supply and filter.

[0089] Optionally, the power supply terminal VCC of the first trigger and the second trigger is also grounded via a fourth capacitor C4.

[0090] In this embodiment, the power supply terminals VCC of the first trigger and the second trigger are connected to the ground line GND via the fourth capacitor C4, which helps to improve the trigger's resistance to power supply interference and enhances the stability and reliability of the trigger.

[0091] The signal output terminal OUT of the first trigger is electrically connected to the clock terminal CK of the second trigger, so as to output a set of two-frequency divided pulse signals with a phase staggered by 180° to the second trigger. That is, the clock terminal CK of the first trigger is electrically connected to the signal output terminal OUT of the square wave generating unit, so as to receive the square wave signal; the signal output terminal OUT of the first trigger is electrically connected to the clock terminal CK of the second trigger, so as to output a set of two-frequency divided pulse signals with a phase staggered by 180° to the second trigger.

[0092] Taking the trigger selected as SN74HC74PWT chip as an example, it includes two clock terminals, two data terminals, a clear terminal (Clear port), a preset terminal (Preset port) and two signal output terminals (not shown in the figure), and each signal output terminal also includes a forward output terminal and a reverse output terminal; therefore, in the first trigger, the first clock terminal is connected to the signal output terminal of the square wave generating unit, the second clock terminal, the clear terminal, the preset terminal and the second data terminal are connected to the first power supply terminal, the first data terminal is short-circuited with the reverse output terminal of the first signal output terminal, and the forward output terminal and the reverse output terminal of the first signal output terminal are respectively connected to the first clock terminal and the second clock terminal of the second trigger; in the second trigger, the clear terminal and the preset terminal are connected to the first power supply terminal, and the first data terminal and the second data terminal are short-circuited with the reverse output terminal of the first signal output terminal and the reverse output terminal of the second signal output terminal.

[0093] Optionally, in some optional embodiments, a controller may also be provided in the DC regulated power supply, and the monitoring end and the control output end of the controller are electrically connected to the drive circuit and the transformer circuit respectively, so as to monitor the operating status of each device in the drive circuit and the transformer circuit, and control the operation of the corresponding devices.

[0094] In one embodiment, based on the above embodiment, referring to Figure 7 , the driving unit includes a fourth resistor R4, a fifth resistor R5, a first diode D1, a second diode D2, a fifth capacitor C5, a sixth capacitor C6 and a driver; each signal output terminal OUT of the second trigger includes a forward output terminal OUT+ and a reverse output terminal OUT-;

[0095] Among them, the fourth resistor R4 and the first diode D1 are arranged in parallel between the forward output terminal OUT+ of the second trigger and the forward input terminal IN+ of the driver, and the conduction direction of the first diode D1 is from the forward input terminal IN+ of the driver to the forward output terminal OUT+ of the second trigger (that is, the anode of the first diode D1 is connected to the forward input terminal IN+ of the driver, and the cathode is connected to the forward output terminal OUT+ of the second trigger); the fifth resistor R5 and the second diode D2 are arranged in parallel between the reverse output terminal OUT- of the second trigger and the reverse input terminal IN- of the driver, and the conduction direction of the second diode D2 is from the reverse input terminal IN- of the driver to the reverse output terminal OUT- of the second trigger (that is, the anode of the second diode D2 is connected to the reverse input terminal IN- of the driver, and the cathode is connected to the reverse output terminal OUT- of the second trigger);

[0096] The positive input terminal IN+ of the driver is also grounded via a fifth capacitor C5, and the negative input terminal IN- of the driver is also grounded via a sixth capacitor C6.

[0097] In this embodiment, the two signal output terminals OUT of the second trigger are respectively connected to the corresponding driving units, and each outputs a set of two-frequency divided pulse signals with a phase staggered by 90°. Each signal output terminal OUT of the second trigger includes a forward output terminal OUT+ and a reverse output terminal OUT-, and the forward output terminal OUT+ and the reverse output terminal OUT- are connected to the same driving unit, and two signals in a set of two-frequency divided pulse signals with a phase staggered by 90° are respectively output to a driving unit through the forward output terminal OUT+ and the reverse output terminal OUT-.

[0098] Optionally, the fourth resistor R4, the first diode D1 and the fifth capacitor C5 constitute an RC circuit used by the positive input terminal IN+ of the driver; the fifth resistor R5, the second diode D2 and the sixth capacitor C6 constitute an RC circuit used by the reverse input terminal IN- of the driver.

[0099] Optionally, the driver has two signal output terminals OUT, which are used to respectively output two signals of a set of driving signals with dead time and complementary phases of 180° that are finally generated.

[0100] Optionally, the device selection of the driver may be UCC27524ADGN.

[0101] Optionally, the power supply terminal VCC of the driver is further grounded via a seventh capacitor C7, and the power supply terminal VCC of the driver is electrically connected to the second power supply terminal;

[0102] The DC voltage input to the second power supply terminal is greater than the DC voltage input to the first power supply terminal; the second power supply terminal is connected to the power supply terminal VCC of the driver to provide sufficient working voltage for the driver. The DC voltage input to the second power supply terminal (optionally 12V) is greater than the DC voltage input to the first power supply terminal.

[0103] Optionally, the power supply terminal VCC of the driver is further connected to the ground line GND via a seventh capacitor C7 to further improve the stability and anti-interference capability of the circuit.

[0104] In one embodiment, based on the above embodiment, referring to Figure 3 An eighth capacitor C8 is also provided between the voltage output terminal Uo of the transformer and the ground line GND.

[0105] In this embodiment, by arranging the eighth capacitor C8 between the voltage output terminal Uo and the ground line GND, high-frequency noise or fluctuation in the circuit can be filtered out, thereby ensuring the stability and purity of the output voltage.

[0106] In some cases, there will be instantaneous fluctuations or spikes in voltage in the circuit, which may cause damage to the connected equipment. The eighth capacitor C8 can help absorb these fluctuations and make the output voltage more stable.

[0107] Furthermore, the eighth capacitor C8 can compensate for the power factor in the circuit, making the circuit more efficient and helping to provide a stable power supply.

[0108] In addition, the eighth capacitor C8 can provide overload protection to some extent, absorb overcurrent in the circuit, and protect the connected equipment from damage.

[0109] In one embodiment, based on the above embodiment, a control method of a DC regulated power supply is proposed, which is applied to the DC regulated power supply described in the above embodiment; Figure 8 , the control method of the DC regulated power supply includes:

[0110] Step S10, generating a square wave signal of a preset frequency based on a square wave generating unit;

[0111] Step S20: based on the first trigger, convert the square wave signal into a set of two-frequency divided pulse signals with phases staggered by 180°;

[0112] Step S30, based on the second trigger, converting a set of two-frequency divided pulse signals with a phase stagger of 180° into two sets of two-frequency divided pulse signals with a phase stagger of 90°;

[0113] Step S40: Based on each driving unit, a dead time is added to each group of binary frequency-divided pulse signals with a phase staggered by 90° to generate each group of driving signals respectively, and output them to the switch tube module Q of the corresponding transformer.

[0114] In this embodiment, the execution terminal of the embodiment may be a control device, or may be other equipment or devices (such as a control device) that controls the control device.

[0115] Since the control method of the DC regulated power supply adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0116] In addition, a control device is also provided in an embodiment of the present application. The internal structure of the control device can be as follows: Fig. 9As shown, it includes a processor, a memory, a communication interface and an input interface connected by a system bus. Among them, the processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database is used to store data called by the computer program. The communication interface is used to communicate data with an external terminal. The input interface is used to receive a signal input by an external device. When the computer program is executed by the processor, a control method of a DC regulated power supply as described in the above embodiment is implemented.

[0117] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation on the control device to which the present application scheme is applied. For example, in some optional embodiments, the control device may also include an output interface (not shown in the figure), and the output interface is also connected to the system bus and is used to output corresponding signals to the peripheral device.

[0118] In addition, the present application also proposes a computer-readable storage medium, the computer-readable storage medium includes a computer program, and when the computer program is executed by a processor, the steps of the control method of the DC regulated power supply as described in the above embodiment are implemented. It can be understood that the computer-readable storage medium in this embodiment can be a volatile readable storage medium or a non-volatile readable storage medium.

[0119] In summary, the DC regulated power supply, the control method of the DC regulated power supply, the control device and the computer-readable storage medium provided in the embodiments of the present application realize the phase interleaving control drive between the multiple transformers staggered in parallel in the DC regulated power supply, and ensure that these transformers operate at the same switching frequency, and the conduction time of the voltage output between each other is staggered by a certain time, so as to improve the power density of the DC regulated power supply while improving the power density of the DC regulated power supply in a low-power manner. At the same time, in the transformer, the busbar is used as the winding plate of the top and bottom layers of the rectifier winding, and is used as the secondary winding, so as to reduce the current density of the rectifier winding, thereby reducing the heat generation of the rectifier winding, so that the power density of the transformer can be made higher while ensuring the safety and stability of the use of the transformer and the DC regulated power supply.

[0120] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided in this application and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0121] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0122] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A DC regulated power supply, characterized in that: It comprises a transformer circuit and a driving circuit; wherein the transformer circuit is provided with a plurality of transformers connected in parallel in an interlaced manner; the driving circuit comprises a first power supply end, a square wave generating unit, a first trigger, a second trigger and two driving units, wherein the first power supply end is electrically connected to the power supply ends of the square wave generating unit, the first trigger and the second trigger respectively, the signal output end of the square wave generating unit is electrically connected to the clock end of the first trigger; the signal output end of the first trigger is electrically connected to the clock end of the second trigger; the two signal output ends of the second trigger are electrically connected to the input ends of the two driving units respectively; the same-frequency signal output ends with a phase difference between the two driving units are respectively used to connect the control ends of the switch tube modules in each of the transformers; Among them, the main board of the transformer is a multi-layer circuit board, and a rectifier winding is arranged on the main board, and in the rectifier winding core, the primary winding and the secondary winding are alternately stacked; the top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar and half of the secondary winding are connected in parallel between the voltage output end of the transformer and one of the switch tube modules, and are grounded through the switch tube module; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output end of the transformer and another of the switch tube modules, and are grounded through the switch tube module.

2. The DC regulated power supply according to claim 1, characterized in that: The rectifier winding core, the first bus bar, and the second bus bar are all provided with corresponding through holes, a first magnetic core is provided on the first bus bar, and a second magnetic core is provided under the second bus bar; and the protruding magnetic strip in the first magnetic core passes through the through hole and contacts with the second magnetic core; A through slot is also provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is also provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.

3. The DC regulated power supply according to claim 1, characterized in that: The square wave generating unit comprises a first resistor, a second resistor, a first capacitor and a timer; wherein the power supply end of the timer is electrically connected to the first power supply end, the first resistor is externally connected between the power supply end and the discharge end of the timer, the discharge end is also connected to the threshold pin and the trigger end of the timer respectively via the external second resistor, and the trigger end is also grounded via the first capacitor; the signal output end of the timer is the signal output end of the square wave generating unit.

4. The DC regulated power supply according to claim 3, characterized in that: The square wave generating unit also includes a third resistor, a second capacitor and a third capacitor; wherein the third resistor is externally connected between the power supply terminal and the reset terminal of the timer, and the reset terminal is also connected to the reset signal input terminal; the common pin of the timer is also grounded via the second capacitor; and the power supply terminal of the timer is also grounded via the third capacitor.

5. The DC regulated power supply according to claim 1, characterized in that: The power supply terminals of the first trigger and the second trigger are also grounded via a fourth capacitor.

6. The DC regulated power supply according to claim 1, characterized in that: The driving unit includes a fourth resistor, a fifth resistor, a first diode, a second diode, a fifth capacitor, a sixth capacitor, a seventh capacitor and a driver; each signal output end of the second trigger includes a forward output end and a reverse output end; Among them, the fourth resistor and the first diode are arranged in parallel between the forward output terminal of the second trigger and the forward input terminal of the driver, and the conduction direction of the first diode is from the forward input terminal of the driver to the forward output terminal of the second trigger; the fifth resistor and the second diode are arranged in parallel between the reverse output terminal of the second trigger and the reverse input terminal of the driver, and the conduction direction of the second diode is from the reverse input terminal of the driver to the reverse output terminal of the second trigger; The positive input terminal of the driver is also grounded via a fifth capacitor, and the reverse input terminal of the driver is also grounded via a sixth capacitor; the power supply terminal of the driver is also grounded via a seventh capacitor, and the power supply terminal of the driver is electrically connected to the second power supply terminal; The DC voltage input to the second power supply end is greater than the DC voltage input to the first power supply end.

7. The DC regulated power supply according to claim 1, characterized in that: An eighth capacitor is also arranged between the voltage output terminal of the transformer and the ground line.

8. A method for controlling a DC regulated power supply, characterized in that: The DC regulated power supply is a DC regulated power supply according to any one of claims 1 to 7; the control method of the DC regulated power supply comprises: Generate a square wave signal of a preset frequency based on a square wave generating unit; Based on the first trigger, the square wave signal is converted into a set of two-frequency divided pulse signals with phases staggered by 180°; Based on the second trigger, a set of two-frequency divided pulse signals with a phase stagger of 180° is converted into two sets of two-frequency divided pulse signals with a phase stagger of 90°; Based on each driving unit, a dead time is added to each group of binary frequency-divided pulse signals with a phase staggered by 90° to generate each group of driving signals respectively and output them to the switch tube module of the corresponding transformer.

9. A control device, characterized in that: The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the steps of the control method of the DC regulated power supply as claimed in claim 8 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the control method of the DC regulated power supply according to claim 8 are implemented.

Images