CN211669565U - High-efficiency control system based on four-segment linear zero-delay non-blind-area converter - Google Patents
High-efficiency control system based on four-segment linear zero-delay non-blind-area converter Download PDFInfo
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Abstract
The utility model relates to a high-efficient control system based on four sections linear zero time delay non-blind area converters, including photovoltaic power generation system, DC-DC converter, lithium cell, still include high pressure difference current limiter, constant pressure difference current limiter, first section zero time delay linear converter, second section zero time delay linear converter, third section zero time delay linear converter and fourth section zero time delay linear converter. The invention respectively carries out linear transformation on the input voltage and the output voltage through the four-section linear zero-delay non-blind-area converter, further eliminates the sampling blind area and controls the delay, and can improve the energy collection efficiency.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field, especially a high-efficient control system based on four sections linear zero delay non-blind area converters.
Background
With the increase of human resource consumption and the decrease of non-renewable resources on earth, new alternative energy sources are being searched for human beings all over the world. Solar energy is a renewable energy source and has great development space. However, the photovoltaic cell has a problem of low energy conversion efficiency, and both high-intensity charging when the illumination is sufficient and current-limiting charging when the illumination is weak are considered.
The photovoltaic power generation system mainly comprises a photovoltaic solar photovoltaic power generation board, a lithium battery and a charging controller. The whole system can realize the maximum acquisition control of the output power of the solar photovoltaic cell; when the illumination is sufficient, the energy of the solar photovoltaic power generation board can be transmitted to the lithium battery to the maximum extent for power storage. When the illumination is insufficient, on the premise of ensuring the charging efficiency, the charging control voltage is automatically adjusted to realize the optimal efficiency charging. A BUCK type DC-DC converter is generally adopted in the charging controller to convert the voltage of the photovoltaic cell into the charging voltage, so that the voltage conversion efficiency is guaranteed.
Disclosure of Invention
In view of this, the utility model aims at providing a high-efficient control system based on four sections linear zero time delay non-blind area converters carries out linear transformation to input, output voltage respectively through four sections linear zero time delay non-blind area converters, further eliminates sampling blind area and control time delay, can improve energy collection efficiency.
The utility model discloses a following scheme realizes: a high-efficiency control system based on a four-section linear zero-delay non-blind-area converter comprises a photovoltaic power generation system, a DC-DC converter, a lithium battery, a high-pressure-difference current limiter, a constant-pressure-difference current limiter, a first-section zero-delay linear converter, a second-section zero-delay linear converter, a third-section zero-delay linear converter and a fourth-section zero-delay linear converter;
the output end of the photovoltaic power generation system is respectively connected to the input end of the DC-DC converter and the input end of the first-stage zero-time-delay linear converter, and the output end of the DC-DC converter is sequentially connected to a power supply port of the lithium battery through the high-voltage difference current limiter and the constant-voltage difference current limiter; the output end of the first section of zero-time delay linear converter is connected to the input end of the second section of zero-time delay linear converter; the first input end of the third section of zero-time delay linear converter is connected with a power supply port of the lithium battery, the second input end of the third section of zero-time delay linear converter is connected with the output end of the second section of zero-time delay linear converter, and the output end of the third section of zero-time delay linear converter is connected to the input end of the fourth section of zero-time delay linear converter; and the output end of the fourth-segment zero-time-delay linear converter is connected to the FB end of the feedback voltage control pin of the DC-DC converter.
Further, the first-stage zero-delay linear converter comprises a first resistor R1, a second resistor R2 and a third resistor R3; one end of the first resistor R1 is used as the input end of the first-stage zero-delay linear converter and is connected to the output end of the photovoltaic power generation system, the other end of the first resistor is respectively connected with one end of the second resistor R2 and one end of the third resistor R3, the other end of the second resistor R2 is grounded, and the other end of the third resistor R3 is used as the output end of the first-stage zero-delay linear converter.
Further, the second segment of zero-time delay linear converter comprises a first operational amplifier, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7; one end of the sixth resistor R6 is used as the input end of the second section of zero-delay linear converter, and the other end of the sixth resistor R6 is respectively connected with the negative input end of the first operational amplifier and one end of the seventh resistor R7; the other end of the seventh resistor R7 is connected with the output end of the first operational amplifier and is used as the output end of the second section of zero-delay linear converter; one end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the positive input end of the first operational amplifier, respectively, the other end of the fourth resistor R4 is grounded, and the other end of the fifth resistor R5 is connected to the VCC end of the first operational amplifier and is connected to VCC.
Further, the third segment of zero-delay linear converter comprises a second operational amplifier, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12 and a thirteenth resistor R13; one end of the eighth resistor R8 is used as the first input end of the third-stage zero-delay linear converter, and the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the negative input end of the second operational amplifier, respectively; the other end of the ninth resistor R9 is connected with the output end of the second operational amplifier and is used as the output end of the third-stage zero-delay linear converter; one end of a twelfth resistor R12 is used as a second input end of the third-stage zero-delay linear converter, the other end of the twelfth resistor R12 is connected to one end of a thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to one end of an eleventh resistor R11, one end of a tenth resistor R10 and the positive input end of the second operational amplifier respectively; the other end of the eleventh resistor R11 is connected with the Vcc end of the second operational amplifier and is connected to VCC; the other end of the tenth resistor R10 is connected to ground.
Further, the fourth segment of zero-time delay linear converter comprises a fourteenth resistor R14, a fifteenth resistor R15 and a sixteenth resistor R16; one end of the fourteenth resistor R14 is used as the input end of the fourth segment of zero-delay linear converter, the other end of the fourteenth resistor R14 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, respectively, the other end of the fifteenth resistor R15 is grounded, and the other end of the sixteenth resistor R16 is used as the output end of the fourth segment of zero-delay linear converter.
Further, the high dropout current limiter comprises a seventeenth resistor R17, an eighteenth resistor R18 and an NMOS transistor, wherein one end of the seventeenth resistor R17 is connected to the source of the NMOS transistor and serves as the input end of the high dropout current limiter, the other end of the seventeenth resistor R17 is connected to one end of the eighteenth resistor R18 and the gate of the NMOS transistor, the other end of the eighteenth resistor R18 is grounded, and the drain of the NMOS transistor serves as the output end of the high dropout current limiter.
Further, the constant voltage difference current limiter comprises a nineteenth resistor R19 and a twentieth resistor R20, wherein one end of the nineteenth resistor R19 serves as an input end of the constant voltage stub current limiter, the other end of the nineteenth resistor R19 is connected with one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 serves as an output end of the constant voltage stub current limiter.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a four sections linear zero time delay non-blind area converters carry out linear transformation to input, output voltage respectively, further eliminate sampling blind area and control time delay, can improve energy collection efficiency.
Drawings
Fig. 1 is a schematic block diagram of a system according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a first stage zero-delay linear converter according to an embodiment of the present invention.
Fig. 3 is a circuit schematic diagram of a second zero-delay linear converter according to an embodiment of the present invention.
Fig. 4 is a circuit schematic diagram of a third zero-delay linear converter according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a fourth segment zero-delay linear converter according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of the constant-voltage-difference current limiter and the constant-voltage-difference current limiter according to the embodiment of the present invention.
Fig. 7 is a schematic diagram of a circuit principle of the output voltage and the feedback voltage of the DC-DC converter according to the embodiment of the present invention.
Fig. 8 is a schematic diagram illustrating energy collection differences between the method of the embodiment of the present invention and a conventional MPPT control method or an MCU sampling analysis and calculation method. In the figure, (a) is the energy collection situation of the traditional MPPT control method or the sampling analysis calculation method using the MCU, and (b) is the energy collection situation of the method according to the embodiment of the present invention. .
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1, the present embodiment provides a high-efficiency control system based on a four-segment linear zero-delay non-blind-area converter as shown in fig. 1, and the present embodiment provides a high-efficiency control system based on a four-segment linear zero-delay non-blind-area converter, including a photovoltaic power generation system, a DC-DC converter (a BUCK-type DC-DC converter may be used), a lithium battery, a high-voltage-difference current limiter, a constant-voltage-difference current limiter, a first-segment zero-delay linear converter, a second-segment zero-delay linear converter, a third-segment zero-delay linear converter;
the output end of the photovoltaic power generation system is respectively connected to the input end of the DC-DC converter and the input end of the first-stage zero-time-delay linear converter, and the output end of the DC-DC converter is sequentially connected to a power supply port of the lithium battery through the high-voltage difference current limiter and the constant-voltage difference current limiter; the output end of the first section of zero-time delay linear converter is connected to the input end of the second section of zero-time delay linear converter; the first input end of the third section of zero-time delay linear converter is connected with a power supply port of the lithium battery, the second input end of the third section of zero-time delay linear converter is connected with the output end of the second section of zero-time delay linear converter, and the output end of the third section of zero-time delay linear converter is connected to the input end of the fourth section of zero-time delay linear converter; and the output end of the fourth-segment zero-time-delay linear converter is connected to the FB end of the feedback voltage control pin of the DC-DC converter.
As shown in fig. 2, in the present embodiment, the first zero-delay linear transformer includes a first resistor R1, a second resistor R2, and a third resistor R3; one end of the first resistor R1 is used as the input end of the first-stage zero-delay linear converter and is connected to the output end of the photovoltaic power generation system, the other end of the first resistor is respectively connected with one end of the second resistor R2 and one end of the third resistor R3, the other end of the second resistor R2 is grounded, and the other end of the third resistor R3 is used as the output end of the first-stage zero-delay linear converter.
First section zero time delay linear transformation ware is through regarding solar photovoltaic power generation system voltage value as the input, utilizes star topology resistance bridge to carry out linear transformation, when guaranteeing that whole sampling process zero time delay does not have the blind area, realizes obtaining the function of voltage value from solar photovoltaic system, guarantees simultaneously that the relation of topology output and input is zero time delay does not have the blind area linear transformation, and the input/output voltage relation of first section zero time delay linear transformation ware is as follows:
VC1O＝k11×VSOLAR+b1；
in the formula (I), the compound is shown in the specification,
b1＝-II01r3, wherein II01The leakage current of the negative input end of the first operational amplifier is constant and is provided by the chip datasheet. In general, the resistance of R3 is much larger than that of R1 and R2.
As shown in fig. 3, in the present embodiment, the second zero-delay linear transformer includes a first operational amplifier, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; one end of the sixth resistor R6 is used as the input end of the second section of zero-delay linear converter, and the other end of the sixth resistor R6 is respectively connected with the negative input end of the first operational amplifier and one end of the seventh resistor R7; the other end of the seventh resistor R7 is connected with the output end of the first operational amplifier and is used as the output end of the second section of zero-delay linear converter; one end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the positive input end of the first operational amplifier, respectively, the other end of the fourth resistor R4 is grounded, and the other end of the fifth resistor R5 is connected to the VCC end of the first operational amplifier and is connected to VCC.
The second-stage zero-time-delay linear converter outputs a value V after voltage conversion through the solar photovoltaic power generation systemC1OAs input, the first operational amplifier is used for linear transformation, zero time delay and no blind area in the whole sampling process are ensured, and the output value V after voltage transformation of the solar photovoltaic power generation system is realizedC1OTo the fine-tuning control voltage VC2OAnd the output is linearly converted, and the overvoltage and undervoltage protection functions of the input voltage are realized by utilizing the operation and amplification rail saturation voltage characteristic. Taking a 10V solar panel as an example, the transformation is as follows:
in the formula (I), the compound is shown in the specification,
VCC has a value of 3.3V, where V issolaarI.e. the output voltage of the photovoltaic power generation system, i.e. V in fig. 1inThrough a first stage zero-delay linear transformer, VsolaarAnd VC1OAnd correspond to each other. When the output voltage of the solar panel is higher than 4.5V and lower than 10V, the output voltage and V of the operational amplifierC1OAnd in a linear relation, the charging current is automatically adjusted according to the illumination intensity. When the output voltage of the solar panel is lower than 4.5V, the operational amplifier output voltage clock is kept at 0V and unchanged (lowest rail voltage), and the charging current is not further adjusted, so that the output voltage of the solar panel is stable. When the output voltage of the solar panel is higher than 10V, the operational amplifier output voltage clock is kept at VCC unchanged (highest rail voltage), and the charging current is not further adjusted, so that the output current of the solar panel is stable.
As shown in fig. 4, in this embodiment, the third-stage zero-delay linear transformer includes a second operational amplifier, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13; one end of the eighth resistor R8 is used as the first input end of the third-stage zero-delay linear converter, and the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the negative input end of the second operational amplifier, respectively; the other end of the ninth resistor R9 is connected with the output end of the second operational amplifier and is used as the output end of the third-stage zero-delay linear converter; one end of a twelfth resistor R12 is used as a second input end of the third-stage zero-delay linear converter, the other end of the twelfth resistor R12 is connected to one end of a thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to one end of an eleventh resistor R11, one end of a tenth resistor R10 and the positive input end of the second operational amplifier respectively; the other end of the eleventh resistor R11 is connected with the Vcc end of the second operational amplifier and is connected to VCC; the other end of the tenth resistor R10 is connected to ground.
The third section of zero time delay linear converter simulates a voltage value V of the lithium batteryBATAs an input, the characteristic of amplitude limiting from the operational amplifier to the output rail voltage is utilized to realize that the output control voltage is not converted when the lithium battery voltage is higher than a set threshold value, so that the output voltage of the fourth section of zero-time-delay linear converter is controlled to control the DC-DC output voltage, the lithium battery is charged at a constant voltage when the lithium battery voltage is higher than the set threshold value, and the lithium battery is charged at a constant voltage when the lithium battery voltage is higher than the set thresholdAnd when the voltage is lower than the threshold value, constant-current charging is carried out, so that the lithium battery charging protection is realized. The input and output characteristics of the third-stage zero-delay linear converter are as follows:
in the formula, k33＝-R9/R8，b3＝(1+R9/R8)*V2-，V2-＝V2+Wherein, in the step (A),
VCC＝3.3V。
as shown in fig. 5, in the present embodiment, the fourth segment zero-delay linear transformer includes a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16; one end of the fourteenth resistor R14 is used as the input end of the fourth segment of zero-delay linear converter, the other end of the fourteenth resistor R14 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, respectively, the other end of the fifteenth resistor R15 is grounded, and the other end of the sixteenth resistor R16 is used as the output end of the fourth segment of zero-delay linear converter.
The fourth section of zero-delay linear converter receives the output of the third section of linear conversion, and utilizes the star topological resistor bridge to perform linear conversion, so that the function of acquiring a voltage value from a solar photovoltaic system is realized while zero-delay non-blind area in the whole sampling process is ensured, and meanwhile, the relation between topological output and input is ensured to be zero-delay non-blind area linear conversion, as follows, wherein VC4O(VBF) A feedback voltage pin FB for controlling DC-DC for four-segment conversion of the total output:
VC4O＝k44×VC3O+b4；
in the formula (I), the compound is shown in the specification,
b4＝IFBr16, wherein IFBThe leakage current input to the feedback pin FB of the DC-DC converter is constant and is provided by the datasheet of the chip. In general, the resistance of R16 is much larger than that of R14 and R15. AIn general, the resistance of R16 is much greater than that of R14 and R15.
As shown in fig. 6, in this embodiment, the high dropout current limiter includes a seventeenth resistor R17, an eighteenth resistor R18 and an NMOS transistor, one end of the seventeenth resistor R17 is connected to the source of the NMOS transistor and serves as an input terminal of the high dropout current limiter, the other end of the seventeenth resistor R17 is connected to one end of the eighteenth resistor R18 and the gate of the NMOS transistor, the other end of the eighteenth resistor R18 is grounded, and the drain of the NMOS transistor serves as an output terminal of the high dropout current limiter. The constant voltage difference current limiter comprises a nineteenth resistor R19 and a twentieth resistor R20, one end of the nineteenth resistor R19 serves as the input end of the constant voltage stubble current limiter, the other end of the nineteenth resistor R19 is connected with one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 serves as the output end of the constant voltage stubble current limiter.
When the voltage of the battery is lower than the voltage which is obtained by subtracting the maximum sustainable voltage difference of the constant current mode from the lowest voltage output by the DC-DC converter, the DC-DC converter outputs the lowest constant working voltage to maintain constant voltage charging. At this time, a large voltage difference exists between the output voltage of the DC-DC converter and the battery voltage, and the high-voltage difference current limiter acts. The working principle of the device is to utilize an approximate linear working curve of the MOS tube in a low-voltage section. As the battery voltage increases, the voltage of the DC-DC converter increases and the low-dropout operation is maintained, and the constant-dropout current limiter functions. The current limiting method is characterized in that the high-voltage difference current limiter works under the condition that the DC-DC converter outputs the lowest constant working voltage, the current limiting is realized by using a volt-ampere characteristic curve of the MOS tube under the condition of low working voltage, meanwhile, when the output voltage of the DC-DC converter is increased, the MOS tube can be quickly conducted and has extremely low impedance due to the nonlinear characteristic of the MOS tube, the high-voltage current limiter is equivalent to a channel, and the current limiting is realized by using a pure resistance linear network at two ports of the constant-voltage difference current limiter.
As shown in FIG. 7, in the present embodiment, the output voltage V of the DC-DC converteroutAnd a feedback voltage VFB(VC40) The relationship of (a) to (b) is as follows:
Vout＝(VFB/R22+Is)*R21+VFB；
wherein Is controlled by regulationA current value for Vout offset, which is set by VC30Determine, and VC3OFrom VsolarAnd VBATJointly determine (see the output characteristic formula of the third section zero-delay linear converter),
the embodiment also provides a method for controlling the system based on the four-segment linear zero-delay non-blind-area converter for the photovoltaic power generation system, which is characterized in that the zero-delay linear converter is adopted to sample from the output end of the photovoltaic power generation system and the power supply port of the lithium battery respectively, the sampled output voltage of the photovoltaic power generation system is subjected to linear change for four times, the power supply voltage of the lithium battery is combined to obtain the optimal control voltage, the optimal control voltage is used for controlling the feedback voltage pin FB of the DC-DC converter, and further the output voltage of the DC-DC converter is adjusted, so that the output voltage of the DC-DC converter and the voltage of the lithium battery keep the optimal differential pressure to control the charging current. The charging current can maintain the difference value between the output voltage of the DC-DC converter and the voltage of the lithium battery to be stable while ensuring the highest efficiency of the photovoltaic power generation system to charge the lithium battery, thereby ensuring the charging current to be stable.
In the present embodiment, the optimum control voltage VFBWith the output voltage V of the photovoltaic power generation systemsolarVoltage V of lithium batterybatIs a binary linear combination, i.e.:
VFB＝k1×Vsolar+k2×Vbat+b；
wherein k1 and k2 are constants and are determined by parameters of the four-segment zero-delay linear transformer. The binary linear combination formula is obtained by substituting an output characteristic formula of the four-section zero-delay linear converter. Feedback voltage pin FB voltage V of DC-DC converterFBThe control is carried out through linear transformation, so that the DC-DC output voltage is adjustable in a certain range.
In this embodiment, the high differential pressure current limiter and the constant differential pressure current limiter are respectively adopted to perform current limiting control; when the voltage of the lithium battery is lower than a preset value, the DC-DC converter outputs the lowest constant working voltage, and at the moment, a large voltage difference exists between the output voltage of the DC-DC converter and the voltage of the battery, so that the high-voltage-difference current limiter acts; as the voltage of the lithium battery rises, the output voltage of the DC-DC converter rises along with the rise of the voltage of the lithium battery, and the low-voltage-difference work is kept, so that the constant-voltage-difference current limiter works.
Preferably, in this embodiment, the fourth-segment zero-delay linear converter is used to realize constant-current and constant-voltage charging of the battery, and the first-segment and second-segment zero-delay linear converters are used to realize automatic adjustment of the charging current according to the illumination intensity and maintain a stable voltage difference. And the voltage regulation of the feedback voltage control pin of the DC-DC is realized by utilizing the fourth section of zero time delay linear converter. High-voltage difference current limiting is realized by using linear characteristics of an MOS (metal oxide semiconductor) tube, and low-voltage difference current limiting is realized by using nonlinear characteristics of the MOS tube and a two-port linear pure resistance network. The four independent sections of the zero-delay linear converters are all formed by adopting low-power-consumption linear analog operational amplifiers and star-shaped resistor bridge design, the sampling within a full voltage range without blind areas can be realized, the zero delay in the feedback control process is realized, and the energy loss caused by the feedback delay is eliminated. The energy collection difference between the MPPT control method and the traditional MPPT control method or the energy collection method adopting the MCU sampling analysis calculation method is shown in fig. 8, the embodiment can realize normal charging of the lithium battery when the illumination intensity is as weak as 100uA output, the energy collection efficiency is higher than 70%, and as shown in fig. 8, the method disclosed by the invention is greatly superior to the traditional solar energy collection schemes such as MPPT, a sampling controller (about 19%) and the like.
It is worth mentioning that the utility model protects a hardware structure, as for the control method does not require protection. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.
Claims (7)
1. A high-efficiency control system based on a four-section linear zero-delay non-blind-area converter comprises a photovoltaic power generation system, a DC-DC converter and a lithium battery, and is characterized by further comprising a high-pressure-difference current limiter, a constant-pressure-difference current limiter, a first section of zero-delay linear converter, a second section of zero-delay linear converter, a third section of zero-delay linear converter and a fourth section of zero-delay linear converter;
the output end of the photovoltaic power generation system is respectively connected to the input end of the DC-DC converter and the input end of the first-stage zero-time-delay linear converter, and the output end of the DC-DC converter is sequentially connected to a power supply port of the lithium battery through the high-voltage difference current limiter and the constant-voltage difference current limiter; the output end of the first section of zero-time delay linear converter is connected to the input end of the second section of zero-time delay linear converter; the first input end of the third section of zero-time delay linear converter is connected with a power supply port of the lithium battery, the second input end of the third section of zero-time delay linear converter is connected with the output end of the second section of zero-time delay linear converter, and the output end of the third section of zero-time delay linear converter is connected to the input end of the fourth section of zero-time delay linear converter; and the output end of the fourth-segment zero-time-delay linear converter is connected to the FB end of the feedback voltage control pin of the DC-DC converter.
2. The efficient control system based on the four-segment linear zero-delay non-dead-zone converter according to claim 1, wherein the first segment zero-delay linear converter comprises a first resistor R1, a second resistor R2 and a third resistor R3; one end of the first resistor R1 is used as the input end of the first-stage zero-delay linear converter and is connected to the output end of the photovoltaic power generation system, the other end of the first resistor is respectively connected with one end of the second resistor R2 and one end of the third resistor R3, the other end of the second resistor R2 is grounded, and the other end of the third resistor R3 is used as the output end of the first-stage zero-delay linear converter.
3. The efficient control system based on the four-segment linear zero-delay non-dead-zone converter according to claim 1, wherein the second segment zero-delay linear converter comprises a first operational amplifier, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7; one end of the sixth resistor R6 is used as the input end of the second section of zero-delay linear converter, and the other end of the sixth resistor R6 is respectively connected with the negative input end of the first operational amplifier and one end of the seventh resistor R7; the other end of the seventh resistor R7 is connected with the output end of the first operational amplifier and is used as the output end of the second section of zero-delay linear converter; one end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the positive input end of the first operational amplifier, respectively, the other end of the fourth resistor R4 is grounded, and the other end of the fifth resistor R5 is connected to the VCC end of the first operational amplifier and is connected to VCC.
4. The efficient control system based on the four-segment linear zero-delay non-dead-zone converter according to claim 1, wherein the third segment zero-delay linear converter comprises a second operational amplifier, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12 and a thirteenth resistor R13; one end of the eighth resistor R8 is used as the first input end of the third-stage zero-delay linear converter, and the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and the negative input end of the second operational amplifier, respectively; the other end of the ninth resistor R9 is connected with the output end of the second operational amplifier and is used as the output end of the third-stage zero-delay linear converter; one end of a twelfth resistor R12 is used as a second input end of the third-stage zero-delay linear converter, the other end of the twelfth resistor R12 is connected to one end of a thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to one end of an eleventh resistor R11, one end of a tenth resistor R10 and the positive input end of the second operational amplifier respectively; the other end of the eleventh resistor R11 is connected with the Vcc end of the second operational amplifier and is connected to VCC; the other end of the tenth resistor R10 is connected to ground.
5. The efficient control system based on the four-segment linear zero-delay non-dead-zone converter according to claim 1, wherein the fourth segment zero-delay linear converter comprises a fourteenth resistor R14, a fifteenth resistor R15 and a sixteenth resistor R16; one end of the fourteenth resistor R14 is used as the input end of the fourth segment of zero-delay linear converter, the other end of the fourteenth resistor R14 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, respectively, the other end of the fifteenth resistor R15 is grounded, and the other end of the sixteenth resistor R16 is used as the output end of the fourth segment of zero-delay linear converter.
6. The high-efficiency control system based on the four-segment linear zero-delay non-dead-zone converter according to claim 1, wherein the high-dropout current limiter comprises a seventeenth resistor R17, an eighteenth resistor R18 and an NMOS transistor, one end of the seventeenth resistor R17 is connected to the source of the NMOS transistor and serves as the input end of the high-dropout current limiter, the other end of the seventeenth resistor R17 is connected to one end of the eighteenth resistor R18 and the gate of the NMOS transistor, the other end of the eighteenth resistor R18 is grounded, and the drain of the NMOS transistor serves as the output end of the high-dropout current limiter.
7. The high-efficiency control system based on the four-segment linear zero-delay non-dead-zone converter as claimed in claim 1, wherein the constant-voltage-difference current limiter comprises a nineteenth resistor R19 and a twentieth resistor R20, one end of the nineteenth resistor R19 is used as the input end of the constant-voltage-difference current limiter, the other end of the nineteenth resistor R19 is connected with one end of the twentieth resistor R20, and the other end of the twentieth resistor R20 is used as the output end of the constant-voltage-difference current limiter.
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