High-capacity transformer primary current rising control system

Abstract

The invention discloses a primary current rising control system for a high-capacity transformer, and relates to the technical field of transformers, the primary current rising control system comprises a charging driving module, a charging output module and a driving management module, the charging driving module drives the charging output module to output voltage-stabilized direct current to a rechargeable battery, and the driving management module drives the charging output module to output voltage-stabilized direct current; the driving management module manages the charging driving module, and the charging output module obtains a detection result of direct current and sends the detection result to the driving management module. According to the invention, the power supply part can be effectively monitored, and the use performance of the transformer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a primary current boost control system for a large-capacity transformer. Background Art

[0002] In recent years, the growth of high-power electrical appliances has put the power grid under great pressure, and its load carrying capacity and voltage position capacity are obviously insufficient. Especially during the peak period of electricity consumption in summer, the capacity of the original power transformer is often insufficient, the reliability of power supply is reduced, the economic effect of operation is reduced, and even overload operation occurs, and power outages often occur.

[0003] The solution to change the current situation of rural power supply is to transform the lines, mainly to replace aging lines and increase the cross-sectional area; the second is to replace new transformers, mainly large-capacity and energy-saving transformers. How to choose a transformer is related to the reliability and quality of the entire power supply system, so it must be comprehensively considered according to the type, size and distribution of the load. At the same time, the reasonable selection of the capacity of the transformer is also a requirement for the economic operation of the transformer. If the capacity is too small, it will cause the transformer to overload and increase the overload loss, and the final result is to burn the transformer; if the capacity of the distribution transformer is too large, the "big horse pulling a small cart" phenomenon will occur, the transformer cannot be fully utilized, and the no-load loss will increase. Therefore, there is an urgent need for a transformer control system to solve the problem of rural power supply.

[0004] However, the transformer design in the prior art is complex and the power supply part cannot be effectively monitored, resulting in frequent transformer failures. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a primary current boost control system for a large-capacity transformer.

[0006] A first aspect of the present invention provides a large-capacity transformer primary current boost control system, comprising a charging drive module, a charging output module and a drive management module, wherein the charging drive module drives the charging output module to output regulated direct current to a rechargeable battery, the drive management module manages the charging drive module, the charging output module obtains a detection result of direct current and sends the detection result to the drive management module, and the drive management module comprises a chip L6599.

[0007] Preferably, the drive management module also includes: 2 optocouplers (P2B, P3B), 4 transistors (Q2, Q7, Q5, Q29), 9 capacitors (C37, C18, C49, C51, C9, C1, C28, C16, C33), and 14 resistors (R60, R59, R143, R30, R91, R93, R120, R58, R54, R70, R40, R69, R37, R71), wherein both ends of the capacitor (C16) are connected to the controlled end of the optocoupler (P3B), and the third pin of the controlled end of the optocoupler (P2B) is grounded, one end of the resistor (R69) is connected to the fourth pin of the controlled end of the optocoupler (P2B), and the other end of the resistor (R69) is connected to To the collector of the transistor (Q5), the collector of the transistor (Q5) is connected in series with a resistor (R54) and then connected to the PFC port of the chip L6599, one end of the resistor (R40) is connected to the RF port of the chip L6599, the other end of the resistor (R40) is connected to the collector of the transistor (Q5), one end of the resistor (R70) is connected to the STBY port of the chip L6599, the other end of the resistor (R70) is connected to the collector of the transistor (Q5), the non-grounded end of the capacitor (C28) is connected to the STBY port of the chip L6599, the non-grounded end of the capacitor (C33) and the resistor (R37) in parallel is connected to the ISEN port of the chip L6599, and one end of the resistor (R71) is connected to the capacitor (C33). ) and resistor (R37), the other end of resistor (R71) is connected to the power supply circuit, resistor (R58) is connected between the collector and emitter of transistor (Q5), the non-grounded end of the series-connected resistor (R120), capacitor (C9) and capacitor (C49) is connected in parallel to the emitter of transistor (Q5), the non-grounded end of capacitor (C1) is connected between resistor (R120) and capacitor (C9) and is also connected to the VCC port of chip L6599, one end of capacitor (C49) is connected to the emitter of transistor (Q5) and the collector of transistor (Q7), the collector of transistor (Q2) is connected to the base of transistor (Q7) via resistor (R91), and one end of resistor (R93) is connected to the transistor The base of the transistor (Q7), the other end of the resistor (R93) is connected to the 4th pin of the controlled end of the optocoupler (P3B), one end of the resistor (R30) is connected to the 3rd pin of the controlled end of the optocoupler (P3B), the other end of the resistor (R30) is connected to the collector of the transistor (Q29), the collector of the transistor (Q29) is connected to the base of the transistor (Q2), the resistor (R143) and the capacitor (C18) are connected in parallel between the collector and the emitter of the transistor (Q29), the capacitor (C37) and the resistor (R59) are connected in parallel between the base and the emitter of the transistor (Q29), one end of the resistor (R60) is connected to the base of the transistor (Q29), and the other end of the resistor (R60) is connected to the power supply circuit.

[0008] Preferably, the charging drive module includes an upper half-bridge tube drive unit and a lower half-bridge tube drive unit, and the upper half-bridge tube drive unit and the lower half-bridge tube drive unit jointly drive the charging output module, and the upper half-bridge tube drive unit includes: 1 MOS tube (Q3), 2 triodes (Q75, Q77), 2 diodes (D19, D22), 3 capacitors (C62, C92, C93), 7 resistors (R26, R167, R112, R128, R55, R7, R37 ), two ends of the capacitor (C62) are connected to the S pole and the D pole of the MOS tube (Q3), the S pole of the MOS tube (Q3) is connected to one end of the half-bridge excitation inductor (L4), the D pole of the MOS tube (Q3) is connected to the diode (D18), the emitter of the transistor (Q75) is connected to the emitter of the transistor (Q77), one end of the resistor (R167) is connected to the base of the transistor (Q75), the other end of the resistor (R167) is connected to the base of the transistor (Q77), and the One end is connected between the resistor (R167) and the transistor (Q75), one end of the series connection of the diode (D22), the resistor (R128), the resistor (R55), and the resistor (R7) is connected in parallel to the emitter of the transistor (Q75) and the emitter of the transistor (Q77), the other end of the series connection of the diode (D22), the resistor (R128), the resistor (R55), and the resistor (R7) is connected in parallel to the S pole of the MOS tube (Q3) through the resistor (R37), and the diode (D19) One end of the series connection of a diode (D19) and a resistor (R112) is connected to the collector of the transistor (Q75); the other end of the series connection of a diode (D19) and a resistor (R112) is connected to a power supply circuit; one end of a capacitor (C93) is connected to the S pole of the MOS tube (Q3); the other end of the capacitor (C93) is connected to the collector of the transistor (Q75); one end of a capacitor (C92) is connected to the S pole of the MOS tube (Q3); and the other end of the capacitor (C92) is connected between the diode (D19) and the resistor (R112).

[0009] Preferably, the lower half-bridge tube driving unit comprises: 1 MOS tube (Q4), 2 triodes (Q76, Q80), 1 diode (D21), 4 capacitors (C96, C4, C30, C1A), 6 resistors (R41, R127, R9, R126, R24, R119), two ends of the capacitor (C1A) are connected to the S pole and D pole of the MOS tube (Q4), the D pole of the MOS tube (Q4) is connected to one end of the half-bridge excitation inductor (L4), the S pole of the MOS tube (Q4) is grounded, one end of the series-connected diode (D21), resistor (R127) and resistor (R9), and resistor (R126) is connected in parallel between the emitter of the triode (Q76) and the emitter of the triode (Q80), the emitter of the triode (Q76) is connected to the D pole of the triode (L4), and the S pole of the MOS tube (Q4) is grounded. The emitter of the transistor (Q80), the other end of the series-connected diode (D21), resistor (R127) and resistor (R9) and resistor (R126) connected in parallel is connected to resistor (R24) and then grounded, the non-grounded end of the capacitor (C30) is connected to the collector of the transistor (Q80), one end of the series-connected resistor (R119) and capacitor (C4) is connected to the collector of the transistor (Q76), the other end of the series-connected resistor (R119) and capacitor (C4) is grounded, the non-grounded end of the capacitor (C96) is connected to the collector of the transistor (Q76), one end of the resistor (R41) is connected between the base of the transistor (Q76) and the base of the transistor (Q80), the base of the transistor (Q76) is connected to the base of the transistor (Q80), and the other end of the resistor (R41) is connected to the charging circuit.

[0010] Preferably, the charging output module adopts a full-bridge rectifier unit for current detection, and the full-bridge rectifier unit includes: a half-bridge excitation inductor (L4), a main high-frequency transformer (T1 / T2), a capacitor (C27), a differential mode inductor (T70) and five diodes (D1, D3, D7, D9, D10), one end of the half-bridge excitation inductor (L4) is connected to the charging drive module, the other end of the half-bridge excitation inductor (L4) is connected to the first end of the main high-frequency transformer (T1 / T2), the non-grounded end of the series-connected diode (D1), the diode (D3) and the series-connected diode (D9), the diode (D10) is connected in parallel to one end of the diode (D7) via the differential mode inductor (T70), the other end of the diode (D7) is connected to the positive output end of the charging output module, the capacitor (C27) is connected in parallel with the series-connected diode (D1) and the diode (D3),

[0011] The third end and the fourth end of the main high-frequency transformer (T1 / T2) are connected, the fifth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D9) and the diode (D10), and the fourth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D1) and the diode (D3).

[0012] Preferably, the charging output module also includes an output balancing capacity storage absorption circuit and a resonant circuit, wherein the output balancing capacity storage absorption circuit includes: 2 capacitors (C41, C65), 4 resistors (R30, R38, R39, R40), and the non-grounded end of the series-connected capacitor (C41), capacitor (C65) and the series-connected resistor (R30), resistor (R38), resistor (R39), and resistor (R40) is connected in parallel to one end of the diode (D7); the resonant circuit includes: 2 diodes (D17, D18), 4 capacitors (C39, C24, C78, ​​C42), and the non-grounded end of the series-connected diode (D17), diode (D18) and the series-connected capacitor (C39), capacitor (C24), capacitor (C78), and capacitor (C42) is connected in parallel to one end of the diode (D7).

[0013] Preferably, the charging output module also includes an output voltage regulation circuit and a charging constant current detection circuit, wherein the output voltage regulation circuit includes: 1 capacitor (C71), 5 resistors (R62, R57, R63, R61, R60), the non-grounded ends of the capacitor (C71), resistor (R62), and resistor (R57) connected in parallel are connected in sequence to resistor (R63), resistor (R61), and resistor (R60) and then connected to one end of the diode (D7), and the charging constant current detection circuit includes: 2 diodes (D86, D87), 3 resistors (D10, R110, R109), wherein the resistor (R10), the parallel diodes (D86, D87), the resistor (R110), and the resistor (R109) are connected in series in sequence and then connected to the negative output end.

[0014] Preferably, the charging output module further comprises an input current transfer loop, which comprises: 1 current transformer (L1A), 1 capacitor (C53), 3 resistors (R29, R72, R73) and 4 diodes (D72, D73, D74, D75), wherein one end of the current transformer (L1A) is connected to the second end of the main high-frequency transformer (T1 / T2), the diode (D75) and the diode (D74) connected in series and the diode (D73) and the diode (D72) connected in series, the resistor (R72) and the resistor (R73) are connected in parallel to the power supply circuit (T11, T12), one end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D75) and the diode (D74), and the other end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D73) and the diode (D72).

[0015] Preferably, the charging output module also includes an output voltage stabilizing circuit, which includes: 2 capacitors (C43, C75), 10 resistors (R75, R74, R77, R76, R78, R49, R42, R56, R48, R45), wherein the capacitor (R71), resistor (R75), resistor (R74) connected in parallel and resistor (R77), resistor (R76), resistor (R78) are connected in series to form a first protection unit, and the capacitor (C43), resistor (R49), resistor (R42) and resistor (R45), resistor (R48), resistor (R56) are connected in series to form a second protection unit, one end of the first protection unit and the second protection unit after being connected in parallel is connected to the other end of the diode (D7), and one end of the first protection unit and the second protection unit after being connected in parallel is connected to the power supply circuit.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The large-capacity transformer primary current boost control system provided by the present invention includes a charging drive module, a charging output module and a driving management module. The charging drive module drives the charging output module to output regulated direct current to the rechargeable battery. The driving management module manages the charging drive module. The charging output module obtains the detection result of the direct current and sends the detection result to the driving management module. The driving management module includes a chip L6599, which effectively monitors the power supply part and improves the performance of the transformer.

[0018] 2. The data acquisition module collects the voltage and / or current signals of the power circuit on the user side and sends them to the control processing module. The control processing module generates a switch control signal according to the voltage and / or current signals on the user side and the performance parameters of the parallel transformer group, and sends the switch control signal to the first control switch and the second control switch to control the two control switches to operate synchronously to realize the working state control of the parallel transformer group;

[0019] 3. When a transformer fails, other transformers running in parallel can continue to supply power; improve the economic efficiency of operation, switch transformers according to the load changes to reduce power loss and improve operating efficiency, which can avoid the phenomenon of "big horse pulling a small cart" and overload;

[0020] 4. It is conducive to arranging transformer maintenance, which can not only reduce the no-load loss of the transformer and improve efficiency, but also reduce reactive excitation current and improve the power factor of the power grid;

[0021] 5. It is conducive to saving investment, especially in the upgrading and reconstruction of rural power grids. The main method of increasing capacity is to replace large-capacity transformers. If a transformer is connected in parallel, it can save investment, ensure the need for medium and long-term capacity increase, and save investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a circuit schematic diagram of a primary current boost control system for a large-capacity transformer provided by the present invention;

[0023] Figure 2 The present invention is another circuit schematic diagram of a primary current boost control system for a large-capacity transformer provided by the present invention. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention effectively monitors the power supply part and improves the performance of the transformer. The large-capacity transformer primary current boost control system and its various parts are described in detail below.

[0026] Embodiment 1

[0027] Reference Figure 1As shown, a large-capacity transformer primary current boost control system provided by an embodiment of the present invention includes a charging drive module, a charging output module and a driving management module. The charging drive module drives the charging output module to output regulated DC power to the rechargeable battery. The driving management module manages the charging drive module. The charging output module obtains the detection result of the DC power and sends the detection result to the driving management module. The driving management module includes a chip L6599. The driving management module uses the chip L6599 to realize half-bridge driving. The feedback system of the driving management module and the charging output module constitutes a closed-loop control system to achieve the stability of the DC output voltage and current.

[0028] The drive management module also includes: 2 optocouplers P2B and P3B, 4 transistors Q2, Q7, Q5, and Q29, 9 capacitors C37, C18, C49, C51, C9, C1, C28, C16, and C33, and 14 resistors R60, R59, R143, R30, R91, R93, R120, R58, R54, R70, R40, R69, R37, and R71, wherein both ends of capacitor C16 are connected to the controlled end of optocoupler P3B, and the third pin of the controlled end of optocoupler P2B is grounded, one end of resistor R69 is connected to the fourth pin of the controlled end of optocoupler P2B, and resistor R The other end of 69 is connected to the collector of transistor Q5, the collector of transistor Q5 is connected to the PFC port of chip L6599 after being connected in series with resistor R54, one end of resistor R40 is connected to the RF port of chip L6599, the other end of resistor R40 is connected to the collector of transistor Q5, one end of resistor R70 is connected to the STBY port of chip L6599, the other end of resistor R70 is connected to the collector of transistor Q5, the non-grounded end of capacitor C28 is connected to the STBY port of chip L6599, the non-grounded end of capacitor C33 and resistor R37 in parallel is connected to the ISEN port of chip L6599, and resistor R70 is connected to the collector of transistor Q5. One end of resistor R1 is connected between capacitor C33 and resistor R37, the other end of resistor R71 is connected to the power supply circuit, resistor R58 is connected between the collector and emitter of transistor Q5, the non-grounded end of resistor R120, capacitor C9 and capacitor C49 connected in series in parallel is connected to the emitter of transistor Q5, the non-grounded end of capacitor C1 is connected between resistor R120 and capacitor C9 and is also connected to the VCC port of chip L6599, one end of capacitor C49 is connected to the emitter of transistor Q5 and the collector of transistor Q7, the collector of transistor Q2 is connected to the base of transistor Q7 via resistor R91, one end of resistor R93 is connected to the emitter of transistor Q5 and the collector of transistor Q7, the collector of transistor Q2 is connected to the base of transistor Q7 via resistor R91, and one end of resistor R93 is connected to the emitter of transistor Q5. The end is connected to the base of the transistor Q7, the other end of the resistor R93 is connected to the 4th pin of the controlled end of the optocoupler P3B, one end of the resistor R30 is connected to the 3rd pin of the controlled end of the optocoupler P3B, the other end of the resistor R30 is connected to the collector of the transistor Q29, the collector of the transistor Q29 is connected to the base of the transistor Q2, the resistor R143 and the capacitor C18 in parallel are connected between the collector and the emitter of the transistor Q29, the capacitor C37 and the resistor R59 in parallel are connected between the base and the emitter of the transistor Q29, one end of the resistor R60 is connected to the base of the transistor Q29, and the other end of the resistor R60 is connected to the power supply circuit.

[0029] Optocoupler P2B, resistor R69, and resistor R14 form a variable frequency half-bridge drive circuit. The resistors R14 and R40 in the figure are connected in parallel to facilitate parameter adjustment. Transistor Q7, transistor Q2, transistor Q29, resistor R91, resistor R120, resistor R93, resistor R120, capacitor C37, capacitor C18, capacitor C51, and capacitor C1 form the voltage stabilizing circuit of the half-bridge management chip L6599. The operating frequency can be adjusted by resistor R40, preferably 70KHZ, and the circuit architecture is simple and stable. The half-bridge working state (i.e., the driving working state) can be fed back to the PFC boost module through resistor R54. If the half-bridge working state is unstable (input overvoltage or input undervoltage), the half-bridge working state is fed back to the PFC boost module through resistor R54 to stop the PFC from working, which effectively protects the half-bridge and other power devices from damage.

[0030] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the charging drive module includes an upper half-bridge tube drive unit and a lower half-bridge tube drive unit, the upper half-bridge tube drive unit and the lower half-bridge tube drive unit jointly drive the charging output module, the upper half-bridge tube drive unit includes: 1 MOS tube Q3, 2 transistors Q75, Q77, 2 diodes D19, D22, 3 capacitors C62, C92, C93, 7 resistors R26, R167, R112, R128, R55, R7, R37, two ends of the capacitor C62 are connected to the S pole and D pole of the MOS tube Q3, the S pole of the MOS tube Q3 is connected to one end of the half-bridge excitation inductor L4, the D pole of the MOS tube Q3 is connected to the diode D18, the emitter of the transistor Q75 is connected to the emitter of the transistor Q77, one end of the resistor R167 is connected to the base of the transistor Q75, and the other end of the resistor R167 is connected to the base of the transistor Q75. The base of Q77 is connected to the base of Q77, one end of the resistor R26 is connected between the resistor R167 and the transistor Q75, one end of the series connection of the diode D22, the resistor R128, the resistor R55 and the resistor R7 is connected to the emitter of the transistor Q75 and connected between the emitters of the transistor Q77, the other end of the series connection of the diode D22, the resistor R128, the resistor R55 and the resistor R7 is connected in series with the resistor R37 and then connected to the S pole of the MOS tube Q3, one end of the series connection of the diode D19 and the resistor R112 is connected to the collector of the transistor Q75, the other end of the series connection of the diode D19 and the resistor R112 is connected to the power supply circuit, one end of the capacitor C93 is connected to the S pole of the MOS tube Q3, the other end of the capacitor C93 is connected to the collector of the transistor Q75, one end of the capacitor C92 is connected to the S pole of the MOS tube Q3, and the other end of the capacitor C92 is connected between the diode D19 and the resistor R112.

[0031] Resistors R26 and R41 send driving signals to the upper half-bridge MOS tube Q3 , and transistors Q75 and Q77 , together with resistors R128 , R55 and R7 , form a main driving circuit for the MOS tube Q3 .

[0032] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the lower half-bridge tube driving unit, includes: 1 MOS tube Q4, 2 transistors Q76, Q80, 1 diode D21, 4 capacitors C96, C4, C30, C1A, 6 resistors R41, R127, R9, R126, R24, R119, the two ends of the capacitor C1A are connected to the S pole and D pole of the MOS tube Q4, the D pole of the MOS tube Q4 is connected to one end of the half-bridge excitation inductor L4, the S pole of the MOS tube Q4 is grounded, the diode D21 and the resistor R127 connected in series and the resistor R9, The resistor R126 has one end connected in parallel connected between the emitter of the transistor Q76 and the emitter of the transistor Q80, and the transistor The emitter of the transistor Q76 is connected to the emitter of the transistor Q80, the other end of the series connection of the diode D21, the resistor R127, the resistor R9, and the resistor R126 is connected in parallel to the resistor R24 ​​and then grounded, the non-grounded end of the capacitor C30 is connected to the collector of the transistor Q80, one end of the series connection of the resistor R119 and the capacitor C4 is connected to the collector of the transistor Q76, the other end of the series connection of the resistor R119 and the capacitor C4 is grounded, the non-grounded end of the capacitor C96 is connected to the collector of the transistor Q76, one end of the resistor R41 is connected between the base of the transistor Q76 and the base of the transistor Q80, the base of the transistor Q76 is connected to the base of the transistor Q80, and the other end of the resistor R41 is connected to the charging circuit.

[0033] Transistor Q76, transistor Q80, resistor R127, resistor R9, and resistor R126 form the main driving circuit of MOS tube Q4. Resistor R37 and resistor R24 ​​form the G-pole driving signal voltage peak absorption circuit of MOS tube Q3 and MOS tube Q4, and the purpose is to protect the MOS tube from damage. The structural design of the upper half-bridge tube driving unit / lower half-bridge tube driving unit is adopted to enhance the driving capability of the half-bridge MOS tube, and the half-bridge circuit has a stronger output load capacity.

[0034] Among them, the charging output module adopts a full-bridge rectifier unit for current rectification. The full-bridge rectifier unit includes: 1 half-bridge excitation inductor L4, 1 main high-frequency transformer T1 / T2, 1 capacitor C27, 1 differential mode inductor T70 and 5 diodes D1, D3, D7, D9, D10. One end of the half-bridge excitation inductor L4 is connected to the charging drive module, and the other end of the half-bridge excitation inductor L4 is connected to the first end of the main high-frequency transformer T1 / T2. The series-connected diodes D1, D3 and D9 are connected in series. The non-grounded end of the diode D10 after being connected in parallel is connected to one end of the diode D7 via the differential mode inductor T70, and the other end of the diode D7 is connected to the positive output end of the charging output module. The capacitor C27 is connected in parallel with the diode D1 and the diode D3 connected in series, wherein the third and fourth ends of the main high-frequency transformer T1 / T2 are connected, the fifth end of the main high-frequency transformer T1 / T2 is connected between the diode D9 and the diode D10, and the fourth end of the main high-frequency transformer T1 / T2 is connected between the diode D1 and the diode D3.

[0035] Among them, inductor L4 is a half-bridge excitation inductor, main high-frequency transformer T1 / T2 plays the role of isolation and energy storage conversion, inductor T70 outputs differential mode inductor, and the structure of the full-bridge rectifier unit is simple, which enables the charging output module to output stable DC power, and reduces the failure rate of the charging process by more than 20%. The high-frequency isolation transformer realizes variable charging and ignition functions.

[0036] In the large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the charging output module also includes an output balancing capacity storage absorption circuit, and the output balancing capacity storage absorption circuit includes: 2 capacitors C41 and C65, 4 resistors R30, R38, R39, and R40, and the non-grounded end of the series capacitor C41 and capacitor C65 and the series resistors R30, R38, R39, and R40 are connected in parallel to one end of the diode D7. R49 is reserved and can be unused. The output balancing capacity storage absorption circuit plays the role of energy storage and filtering.

[0037] The large-capacity transformer primary current boost control system provided by an embodiment of the present invention, the charging output module also includes a resonant circuit, the resonant circuit includes: 2 diodes D17, D18, 4 capacitors C39, C24, C78, ​​C42, the non-grounded end of the series-connected diode D17, diode D18 and the series-connected capacitor C39, capacitor C24, capacitor C78, ​​capacitor C42 connected in parallel is connected to one end of the diode D7.

[0038] The function of the resonant circuit is to adjust the duty cycle of the MOS tube through the amplitude of resonance and change the output voltage and current of the MOS tube.

[0039] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the charging output module also includes an output voltage regulation circuit, the output voltage regulation circuit includes: 1 capacitor C71, 5 resistors R62, R57, R63, R61, R60, the non-grounded ends of the capacitor C71, resistor R62, and resistor R57 connected in parallel are connected to resistor R63, resistor R61, and resistor R60 in sequence and then connected to one end of the diode D7. The function realized by the output voltage regulation circuit is to output a 5V power voltage for user use.

[0040] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the charging output module also includes a charging constant current detection circuit, and the charging constant current detection circuit includes: 2 diodes D86, D87, 3 resistors D10, R110, R109, wherein the resistor R10, the parallel diodes D86, D87, the resistor R110 and the resistor R109 are connected in series in sequence and connected to the negative output terminal. The resistor R109 is a constant current detection resistor, and the charging constant current detection circuit can set the upper limit value of the charging current.

[0041] The large-capacity transformer primary current boost control system provided by the embodiment of the present invention, the charging output module also includes an input current transfer loop, the input current transfer loop includes: 1 current transformer L1A, 1 capacitor C53, 3 resistors R29, R72, R734 diodes D72, D73, D74, D75, wherein one end of the current transformer L1A is connected to the second end of the main high-frequency transformer T1 / T2, the series-connected diode D75, diode D74 and the series-connected diode D73, diode D72, resistor R72 and resistor R73 are connected in parallel to the power supply circuit T11, T12, one end of the capacitor C53 and the resistor R29 connected in series is connected between the diode D75 and the diode D74, and the other end of the capacitor C53 and the resistor R29 connected in series is connected between the diode D73 and the diode D72.

[0042] Resistor R29 and capacitor C53 form an RC absorption circuit, inductor L1A is a current transformer, and diode D75, diode D74, diode D72, diode D73, resistor R72, and resistor R73 form a working current information transmission loop during the charging process, thereby improving the current detection accuracy by more than 10%.

[0043] In the large-capacity transformer primary current boost control system provided by an embodiment of the present invention, the charging output module also includes an output voltage stabilizing circuit, which includes: 2 capacitors C43 and C75, and 10 resistors R75, R74, R77, R76, R78, R49, R42, R56, R48, and R45. Among them, the capacitor R71, the resistor R75, and the resistor R74 connected in parallel are connected in series with the resistor R77, the resistor R76, and the resistor R78 to form a first protection unit, and the capacitor C43, the resistor R49, and the resistor R42 connected in parallel are connected in series with the resistor R45, the resistor R48, and the resistor R56 to form a second protection unit, one end of the first protection unit and the second protection unit after being connected in parallel is connected to the other end of the diode D7, and one end of the first protection unit and the second protection unit after being connected in parallel is connected to the power supply circuit.

[0044] From the above analysis, it can be seen that the technical solution provided by one or more embodiments of the present specification provided by the embodiment of the present invention can be seen that the large-capacity transformer primary current boost control system provided by the embodiment of the present invention includes a charging drive module, a charging output module and a drive management module. The charging drive module drives the charging output module to output regulated direct current to the rechargeable battery. The drive management module manages the charging drive module. The charging output module obtains the detection result of the direct current and sends the detection result to the drive management module. The drive management module includes a chip L6599, which effectively monitors the power supply part and improves the performance of the transformer.

[0045] Embodiment 2

[0046] The large-capacity transformer primary current boost control system provided in this embodiment. The large-capacity transformer primary current boost control system includes a charging drive module, a charging output module and a driving management module. The charging drive module drives the charging output module to output regulated DC power to the rechargeable battery. The driving management module manages the charging drive module. The charging output module obtains the detection result of the DC power and sends the detection result to the driving management module. The driving management module includes a chip L6599. The driving management module uses the chip L6599 to realize half-bridge driving. The feedback system of the driving management module and the charging output module constitutes a closed-loop control system to achieve the stability of the DC output voltage and current.

[0047] From the above analysis, it can be seen that the large-capacity transformer primary current boost control system provided by the embodiment of the present invention includes a charging drive module, a charging output module and a drive management module. The charging drive module drives the charging output module to output regulated direct current to the rechargeable battery. The drive management module manages the charging drive module. The charging output module obtains the detection result of the direct current and sends the detection result to the drive management module. The drive management module includes a chip L6599, which effectively monitors the power supply part and improves the performance of the transformer.

[0048] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A large-capacity transformer primary current boost control system, characterized in that: It includes a charging drive module, a charging output module and a driving management module. The charging drive module drives the charging output module to output regulated direct current to the rechargeable battery. The driving management module manages the charging drive module. The charging output module obtains the detection result of the direct current and sends the detection result to the driving management module.

2. A large-capacity transformer primary current boost control system according to claim 1, characterized in that: The drive management module includes a chip L6599, and the drive management module also includes: 2 optocouplers (P2B, P3B), 4 triodes (Q2, Q7, Q5, Q29), 9 capacitors (C37, C18, C49, C51, C9, C1, C28, C16, C33), and 14 resistors (R60, R59, R143, R30, R91, R93, R120, R58, R54, R70, R40, R69, R37, R71), wherein both ends of the capacitor (C16) are connected to the controlled end of the optocoupler (P3B), and the third pin of the controlled end of the optocoupler (P2B) is grounded, and one end of the resistor (R69) is connected to the fourth pin of the controlled end of the optocoupler (P2B). pin, the other end of the resistor (R69) is connected to the collector of the transistor (Q5), the collector of the transistor (Q5) is connected to the PFC port of the chip L6599 after being connected in series with the resistor (R54), one end of the resistor (R40) is connected to the RF port of the chip L6599, the other end of the resistor (R40) is connected to the collector of the transistor (Q5), one end of the resistor (R70) is connected to the STBY port of the chip L6599, the other end of the resistor (R70) is connected to the collector of the transistor (Q5), the non-grounded end of the capacitor (C28) is connected to the STBY port of the chip L6599, the non-grounded end of the capacitor (C33) and the resistor (R37) in parallel is connected to the ISEN port of the chip L6599, the resistor One end of (R71) is connected between capacitor (C33) and resistor (R37), the other end of resistor (R71) is connected to the power supply circuit, resistor (R58) is connected between the collector and emitter of transistor (Q5), the non-grounded end of the series resistor (R120), capacitor (C9) and capacitor (C49) connected in parallel is connected to the emitter of transistor (Q5), the non-grounded end of capacitor (C1) is connected between resistor (R120) and capacitor (C9) and is also connected to the VCC port of chip L6599, one end of capacitor (C49) is connected to the emitter of transistor (Q5) and the collector of transistor (Q7), the collector of transistor (Q2) is connected to the VCC port of transistor (Q7) via resistor (R91). base, one end of the resistor (R93) is connected to the base of the transistor (Q7), the other end of the resistor (R93) is connected to the 4th pin of the controlled end of the optocoupler (P3B), one end of the resistor (R30) is connected to the 3rd pin of the controlled end of the optocoupler (P3B), the other end of the resistor (R30) is connected to the collector of the transistor (Q29), the collector of the transistor (Q29) is connected to the base of the transistor (Q2), the parallel resistor (R143) and the capacitor (C18) are connected between the collector and the emitter of the transistor (Q29), the parallel capacitor (C37) and the resistor (R59) are connected between the base and the emitter of the transistor (Q29), one end of the resistor (R60) is connected to the base of the transistor (Q29),The other end of the resistor (R60) is connected to the power supply circuit.

3. A large-capacity transformer primary current boost control system according to claim 2, characterized in that: The charging drive module includes an upper half-bridge tube drive unit and a lower half-bridge tube drive unit, and the upper half-bridge tube drive unit and the lower half-bridge tube drive unit jointly drive the charging output module. The upper half-bridge tube drive unit includes: 1 MOS tube (Q3), 2 triodes (Q75, Q77), 2 diodes (D19, D22), 3 capacitors (C62, C92, C93), 7 resistors (R26, R167, R112, R128, R55, R7, R37), The two ends of the capacitor (C62) are connected to the S pole and the D pole of the MOS tube (Q3), the S pole of the MOS tube (Q3) is connected to one end of the half-bridge excitation inductor (L4), the D pole of the MOS tube (Q3) is connected to the diode (D18), the emitter of the transistor (Q75) is connected to the emitter of the transistor (Q77), one end of the resistor (R167) is connected to the base of the transistor (Q75), the other end of the resistor (R167) is connected to the base of the transistor (Q77), and one end of the resistor (R26) is connected to the base of the transistor (Q75). Connected between the resistor (R167) and the transistor (Q75), one end of the series connection of the diode (D22), resistor (R128), resistor (R55) and resistor (R7) in parallel is connected to the emitter of the transistor (Q75) and connected between the emitter of the transistor (Q77), the other end of the series connection of the diode (D22), resistor (R128), resistor (R55) and resistor (R7) in parallel is connected to the S pole of the MOS tube (Q3) in series with the resistor (R37), the diode (D19), One end of the resistor (R112) connected in series is connected to the collector of the transistor (Q75), the other end of the diode (D19) and the resistor (R112) connected in series is connected to the power supply circuit, one end of the capacitor (C93) is connected to the S pole of the MOS tube (Q3), the other end of the capacitor (C93) is connected to the collector of the transistor (Q75), one end of the capacitor (C92) is connected to the S pole of the MOS tube (Q3), and the other end of the capacitor (C92) is connected between the diode (D19) and the resistor (R112).

4. A large-capacity transformer primary current boost control system according to claim 3, characterized in that: The lower half-bridge tube driving unit comprises: a MOS tube (Q4), two triodes (Q76, Q80), a diode (D21), four capacitors (C96, C4, C30, C1A), and six resistors (R41, R127, R9, R126, R24, and R119), two ends of the capacitor (C1A) are connected to the S pole and D pole of the MOS tube (Q4), the D pole of the MOS tube (Q4) is connected to one end of the half-bridge excitation inductor (L4), the S pole of the MOS tube (Q4) is grounded, one end of the series-connected diode (D21), the resistor (R127) and the resistor (R9) and the resistor (R126) is connected in parallel to between the emitter of the triode (Q76) and the emitter of the triode (Q80), the emitter of the triode (Q76) is connected to the The emitter of transistor (Q80), the other end of the series-connected diode (D21), resistor (R127) and resistor (R9) and resistor (R126) connected in parallel is connected to resistor (R24) and then grounded, the non-grounded end of capacitor (C30) is connected to the collector of transistor (Q80), one end of the series-connected resistor (R119) and capacitor (C4) is connected to the collector of transistor (Q76), the other end of the series-connected resistor (R119) and capacitor (C4) is grounded, the non-grounded end of capacitor (C96) is connected to the collector of transistor (Q76), one end of resistor (R41) is connected between the base of transistor (Q76) and the base of transistor (Q80), the base of transistor (Q76) is connected to the base of transistor (Q80), and the other end of resistor (R41) is connected to the charging circuit.

5. A large-capacity transformer primary current boost control system according to claim 4, characterized in that: The charging output module adopts a full-bridge rectifier unit for current detection. The full-bridge rectifier unit includes: a half-bridge excitation inductor (L4), a main high-frequency transformer (T1 / T2), a capacitor (C27), a differential mode inductor (T70) and five diodes (D1, D3, D7, D9, D10). One end of the half-bridge excitation inductor (L4) is connected to the charging drive module, and the other end of the half-bridge excitation inductor (L4) is connected to the first end of the main high-frequency transformer (T1 / T2). The non-grounded end of the series-connected diode (D1), the diode (D3) and the series-connected diode (D9), the diode (D10) is connected in parallel to one end of the diode (D7) via the differential mode inductor (T70). The other end of the diode (D7) is connected to the positive output end of the charging output module. The capacitor (C27) is connected in parallel to the series-connected diode (D1) and the diode (D3). The third end and the fourth end of the main high-frequency transformer (T1 / T2) are connected, the fifth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D9) and the diode (D10), and the fourth end of the main high-frequency transformer (T1 / T2) is connected between the diode (D1) and the diode (D3).

6. A large-capacity transformer primary current boost control system according to claim 5, characterized in that: The charging output module also includes an output balancing capacity storage absorption circuit and a resonant circuit. The output balancing capacity storage absorption circuit includes: 2 capacitors (C41, C65), 4 resistors (R30, R38, R39, R40), and the non-grounded end of the series-connected capacitor (C41), capacitor (C65) and the series-connected resistor (R30), resistor (R38), resistor (R39), and resistor (R40) is connected in parallel to one end of the diode (D7). The resonant circuit includes: 2 diodes (D17, D18), 4 capacitors (C39, C24, C78, ​​C42), and the non-grounded end of the series-connected diode (D17), diode (D18) and the series-connected capacitor (C39), capacitor (C24), capacitor (C78), and capacitor (C42) is connected in parallel to one end of the diode (D7).

7. A large-capacity transformer primary current boost control system according to claim 6, characterized in that: The charging output module also includes an output voltage regulation circuit and a charging constant current detection circuit. The output voltage regulation circuit includes: 1 capacitor (C71), 5 resistors (R62, R57, R63, R61, R60), the non-grounded ends of the capacitor (C71), resistor (R62), and resistor (R57) connected in parallel are connected to resistor (R63), resistor (R61), and resistor (R60) in sequence and then connected to one end of the diode (D7), and the charging constant current detection circuit includes: 2 diodes (D86, D87), 3 resistors (D10, R110, R109), wherein the resistor (R10), the parallel diodes (D86, D87), the resistor (R110), and the resistor (R109) are connected in series in sequence and then connected to the negative output end.

8. A large capacity transformer primary current boost control system according to claim 7, characterized in that: The charging output module also includes an input current transfer loop, which includes: a current transformer (L1A), a capacitor (C53), three resistors (R29, R72, R73) and four diodes (D72, D73, D74, D75), wherein one end of the current transformer (L1A) is connected to the second end of the main high-frequency transformer (T1 / T2), the diode (D75) and the diode (D74) connected in series and the diode (D73) and the diode (D72) connected in series, the resistor (R72) and the resistor (R73) are connected in parallel to the power supply circuit (T11, T12), one end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D75) and the diode (D74), and the other end of the capacitor (C53) and the resistor (R29) connected in series is connected between the diode (D73) and the diode (D72).

9. A large capacity transformer primary current boost control system according to claim 8, characterized in that: The charging output module also includes an output voltage stabilizing circuit, which includes: 2 capacitors (C43, C75), 10 resistors (R75, R74, R77, R76, R78, R49, R42, R56, R48, R45), wherein the capacitor (R71), resistor (R75), resistor (R74) connected in parallel and resistor (R77), resistor (R76), resistor (R78) are connected in series to form a first protection unit, and the capacitor (C43), resistor (R49), resistor (R42) and resistor (R45), resistor (R48), resistor (R56) are connected in series to form a second protection unit, one end of the first protection unit and the second protection unit connected in parallel is connected to the other end of the diode (D7), and one end of the first protection unit and the second protection unit connected in parallel is connected to the power supply circuit.

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