CN218586895U - Three-phase active current unbalance control circuit of electric power emergency power supply vehicle - Google Patents
Three-phase active current unbalance control circuit of electric power emergency power supply vehicle Download PDFInfo
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- CN218586895U CN218586895U CN202222212154.XU CN202222212154U CN218586895U CN 218586895 U CN218586895 U CN 218586895U CN 202222212154 U CN202222212154 U CN 202222212154U CN 218586895 U CN218586895 U CN 218586895U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a three-phase active current unbalance control circuit of an electric power emergency power supply vehicle, which comprises a controller, an adjusting circuit and a sampling circuit; the controller is respectively connected with the regulating circuit and the sampling circuit; the adjusting circuit comprises three A-phase adjusting circuits, B-phase adjusting circuits, C-phase adjusting circuits, two capacitors and three adjusting circuits which have the same circuit structure; the two capacitors are connected in series, and the sampling circuit is respectively connected with the two capacitors in parallel; the phase A adjusting circuit, the phase B adjusting circuit and the phase C adjusting circuit are connected in parallel, and the three adjusting circuits are respectively connected with a current transformer which is connected with the controller. Compared with the prior art, the current is compensated according to the current condition by collecting the current of each phase line, so that the effect of balancing and adjusting the three-phase current is achieved, and higher voltage resistance and compensation capacity are achieved.
Description
Technical Field
The utility model relates to a current distribution circuit field, more specifically relates to an electric power emergency power source car's three-phase active current unbalanced control circuit.
Background
When the daily life power consumption, because the power consumption end is the multinomial power consumption, and the power supply section is the three-phase power supply, lead to distribution system to appear the unbalanced condition of three-phase current, when three-phase current is unbalanced, not only can influence user's experience, still can increase power supply end distribution equipment's load, reduce the life of equipment, can lead to equipment overheat damage even, have very big potential safety hazard.
The unbalanced control mode of present three phase current adopts the mode of IGBT half bridge inverter more, discloses an unbalanced three phase treatment device in the utility model patent of publication No. CN215772562U, wherein has adopted IGBT half bridge inverter to adjust the electric current of three-phase among the treatment device, but still can have switching device's the too high condition of voltage and electric current to the lower condition of compensation capacity to the electric current.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at overcoming above-mentioned prior art's at least one defect, provide an electric power emergency power source car's three-phase active current unbalanced control circuit for three-phase current balance adjustment provides higher current compensation capacity.
The technical scheme adopted by the utility model is that a three-phase active current unbalance control circuit of an electric power emergency power supply vehicle is provided, the circuit comprises a controller, an adjusting circuit and a sampling circuit;
the controller is respectively connected with the regulating circuit and the sampling circuit;
the adjusting circuit comprises an A-phase adjusting circuit, a B-phase adjusting circuit, a C-phase adjusting circuit, two capacitors and three adjusting lines, wherein the A-phase adjusting circuit, the B-phase adjusting circuit and the C-phase adjusting circuit are respectively connected with the adjusting lines in a one-to-one correspondence manner, and the three adjusting lines are also used for externally connecting three-phase lines;
the two capacitors are connected in series, and the sampling circuit is respectively connected with the two capacitors in parallel and is used for sampling positive and negative voltages of a bus of the regulating circuit and sending a sampling signal to the controller;
the control circuit comprises an A-phase regulating circuit, a B-phase regulating circuit and a C-phase regulating circuit which are connected in parallel, wherein the A-phase regulating circuit, the B-phase regulating circuit and the C-phase regulating circuit respectively comprise four mos tube switches and two clamping diodes, the four mos tubes form a bridge structure, two mos tubes are respectively connected in series on two sides of a bridge arm, the two clamping diodes are connected in series, two ends of a series circuit are respectively connected between the two mos tubes on two sides of the bridge arm, and a gate of each mos tube is connected with a controller and used for receiving a driving signal of the controller;
the B-phase regulating circuit, the C-phase regulating circuit and the A-phase regulating circuit have the same circuit structure;
and the three regulating circuits are respectively connected with a current transformer, and the current transformers are connected with the controller.
The current transformer is used for collecting current in a three-phase line, current information is transmitted to the controller, the controller judges whether the three-phase current is balanced or not, if the three-phase current is not balanced, a driving signal is sent to control the A-phase adjusting circuit, the B-phase adjusting circuit and the C-phase adjusting circuit in the adjusting circuit, and the current balance of the three-phase line is adjusted. The four mos tubes form a bridge structure, two mos tubes are respectively connected in series on two sides of a bridge arm, the two clamping diodes are connected in series, two ends of a series circuit are respectively connected between the two mos tubes on the two sides of the bridge arm, the clamping effect is achieved on the mos tubes, and compared with a circuit with only one mos tube on the bridge arm, the arrangement enables the adjusting circuit to have higher withstand voltage and meanwhile enables the current compensation capacity of the adjusting circuit to be increased.
Furthermore, two inductors are connected in series on each adjusting line, and a current transformer on each adjusting line is arranged between the two inductors.
Further, the controller comprises a PWM tracking control circuit, a driving amplification circuit and an instruction current calculation circuit;
the instruction current calculation circuit is respectively connected with the PWM tracking control module and the current transformer;
the PWM tracking control circuit is respectively connected with the driving amplifying circuit and the sampling circuit;
the drive amplifying circuit is also connected with mos tubes of the A-phase adjusting circuit, the B-phase adjusting circuit and the C-phase adjusting circuit of the adjusting circuit and is used for receiving and amplifying the PWM drive signal and controlling the switching of the mos tubes.
Specifically, the instruction current calculation circuit is a calculation circuit adopting a three-position DSP chip, the current transformer collects current information of a three-phase line and transmits the current information to the instruction current calculation circuit, and the instruction current calculation circuit receives the current information of the current transformer, analyzes and calculates the current information, and transmits a calculation result to the PWM tracking control module. And the PWM tracking control circuit sends a driving signal to the driving amplification circuit according to the calculation result, and the driving amplification circuit sends the driving signal to the A-direction regulating circuit, the B-direction regulating circuit and the C-phase regulating circuit respectively, and controls the conduction and the closing of the mos tube to regulate the magnitude of three-phase current.
Furthermore, the PWM tracking control circuit is a control circuit adopting a DSP chip.
Further, the driving amplification circuit is a driving optocoupler device.
Furthermore, the circuit also comprises a control display circuit and a communication circuit connected with the control display circuit, wherein the communication circuit is used for being externally connected with a cloud platform;
the control display circuit is connected with the instruction circuit.
The display control circuit is used as a man-machine interaction interface and is provided with a display screen, the display screen displays the current information of the instruction current calculation circuit, receives an operation instruction of a user on the display screen, converts the operation instruction into an electric signal and sends the electric signal to the instruction current calculation circuit for analysis and calculation.
Further, communication circuit includes WIFI module and 4G module of being connected with control display circuit respectively, and WIFI module and 4G module are used for external cloud platform respectively.
The three-phase current information is transmitted to the external cloud platform or instruction information sent by the external cloud platform is received in real time through the WIFI module and the 4G module.
Further, the mos tube is a p-channel enhanced mos tube. The P-channel enhanced mos tube has low hole mobility, the circuit process is simple, and the production cost is reduced.
Furthermore, a lightning arrester is arranged on the adjusting circuit. And protecting the circuit.
Further, the current transformer is also connected with the balanced three-phase line. And detecting the current of the three-phase line after balance adjustment, judging whether the current is balanced, and if the current is unbalanced, transmitting the current information to the command current calculation circuit to carry out calculation adjustment again.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages that: the four mos tubes are adopted to form a bridge structure, two mos tubes are respectively connected in series on two sides of a bridge arm, the two clamping diodes are connected in series, two ends of a series circuit are respectively connected between the two mos tubes on the two sides of the bridge arm, the clamping effect on the mos tubes is achieved, and compared with a circuit with only one mos tube on the bridge arm, the arrangement enables the regulating circuit to have higher withstand voltage and the current compensation capacity of the regulating circuit to be increased.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Description of reference numerals: the controller 10, the instruction current calculating circuit 11, the adjusting circuit 20, the A phase adjusting circuit 21, the B phase adjusting circuit 22, and the C phase adjusting circuit 23.
Detailed Description
The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1, the present embodiment provides a three-phase active current imbalance control circuit for an electric emergency power supply vehicle, where the circuit includes a controller 10, a regulating circuit 20, and a sampling circuit;
the controller comprises a PWM tracking control circuit, a driving amplification circuit and an instruction current calculation circuit 11;
the instruction current calculation circuit 11 is connected with the PWM tracking control module;
the PWM tracking control circuit is respectively connected with the driving amplifying circuit and the sampling circuit;
the regulating circuit comprises an A-phase regulating circuit 21, a B-phase regulating circuit 22, a C-phase regulating circuit 23, a capacitor C1, a capacitor C2 and three regulating circuits, wherein the A-phase regulating circuit 21, the B-phase regulating circuit 22 and the C-phase regulating circuit 23 are respectively connected with the regulating circuits in a one-to-one correspondence manner, the three regulating circuits are also used for externally connecting three-phase circuits, two inductors Ls and L are connected in series on each regulating circuit, a current transformer CT is arranged between the two inductors on each regulating circuit, and the current transformers are connected with the instruction current calculating circuit 11;
the drive amplifying circuit is also connected with mos tubes of an A-phase regulating circuit 21, a B-phase regulating circuit 22 and a C-phase regulating circuit 23 of the regulating circuit;
the capacitors C1 and C2 are connected in series, the two interfaces VT1 and C1 of the sampling circuit are connected in parallel, and the VT2 and C2 are connected in parallel, so that the voltages of the capacitors C1 and C2 are sampled;
the phase-a adjusting circuit 21, the phase-B adjusting circuit 22 and the phase-C adjusting circuit 23 are connected in parallel, the phase-a adjusting circuit 21, the phase-B adjusting circuit 22 and the phase-C adjusting circuit 23 have the same circuit structure, the phase-a adjusting circuit 21, the phase-B adjusting circuit 22 and the phase-C adjusting circuit 23 respectively include four mos tube switches and two clamping diodes, taking the phase-a adjusting circuit 21 as an example, the phase-a adjusting circuit 21 includes four mos tubes, which respectively are: q1, Q2, Q3, Q4, further comprising two clamping diodes: d1 and D2; the four mos tubes form a bridge structure, Q1 and Q2 are connected in series, and Q3 and Q4 are connected in series and are respectively arranged on two sides of the bridge arm; the D1 clamping diode and the D2 clamping diode are connected in series and are respectively connected between two mos tubes on two sides of a bridge arm, and the gate of each mos tube is connected with a controller and used for receiving a driving signal of the controller;
specifically, the PWM tracking control circuit is a control circuit using a DSP chip;
the drive amplifying circuit is a drive optocoupler device.
When the three-phase current balance control circuit is applied specifically, the adjusting circuit collects current from the three-phase circuit, the current transformer obtains three-phase current information from the adjusting circuit and transmits the three-phase current information to the instruction current calculation circuit 11, the instruction current calculation circuit processes the three-phase current to determine whether the three-phase current is balanced, and if the three-phase current is balanced, the three-phase current is not processed continuously; if the current of the A phase line exceeds the balance current, the current of the B phase line is lower than the balance current, and the current of the C phase line is the same as the balance current, the current of the A phase line is controlled to flow into the B phase line, so that the compensation of the current is controlled, and the current of the three phase line is balanced.
In a specific implementation process, the command current calculating circuit 11 determines whether the three-phase currents are balanced based on a method in the prior art, which may be implemented by using a calculating circuit of a three-bit DSP chip.
Specifically, the circuit further comprises a control display circuit and a communication circuit connected with the control display circuit, wherein the communication circuit is used for being externally connected with a cloud platform;
the control display circuit is connected with the instruction circuit.
The communication circuit comprises a WIFI module and a 4G module which are respectively connected with the control display circuit, and the WIFI module and the 4G module are respectively used for being connected with an external cloud platform.
When the display control circuit is used in a specific application, the display control circuit is used as a human-computer interaction interface and is provided with a display screen, the display screen is provided with an operation interface and can display information, the display control cable displays current information from the instruction current calculation circuit through the display screen and can input an operation instruction, a user inputs the operation instruction on the display screen, and the operation instruction is converted into an electric signal through the display control circuit and is sent to the instruction current calculation circuit for processing. And the circuit information can be transmitted to an external cloud platform through a wireless network in real time through a WIFI module and a 4G module of the communication circuit, so that remote real-time monitoring is carried out, a remote control instruction can be received, and control operation is carried out from a remote end.
Specifically, as shown in fig. 1, a lightning arrester is further disposed on the adjusting line. The lightning protection circuit is used for protecting a circuit and preventing lightning from being damaged.
Specifically, as shown in fig. 1, the current transformer is further connected to the balanced three-phase line. And detecting the regulated three-phase line, judging whether the regulated current is balanced or not, and if the regulated current is unbalanced, continuously acquiring current information and transmitting the current information to the command current calculating circuit for processing and regulation again.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
1. A three-phase active current unbalance control circuit of an electric power emergency power supply vehicle comprises a controller, a regulating circuit and a sampling circuit;
the controller is respectively connected with the regulating circuit and the sampling circuit;
the adjusting circuit comprises an A-phase adjusting circuit, a B-phase adjusting circuit, a C-phase adjusting circuit, two capacitors and three adjusting lines, wherein the A-phase adjusting circuit, the B-phase adjusting circuit and the C-phase adjusting circuit are respectively connected with the adjusting lines in a one-to-one correspondence manner, and the three adjusting lines are also used for externally connecting three-phase lines;
the two capacitors are connected in series, and the sampling circuit is respectively connected with the two capacitors in parallel and is used for sampling positive and negative voltages of a bus of the regulating circuit and sending a sampling signal to the controller;
the circuit is characterized in that the A-phase adjusting circuit, the B-phase adjusting circuit and the C-phase adjusting circuit are connected in parallel and respectively comprise four mos tube switches and two clamping diodes, the four mos tubes form a bridge structure, two mos tubes are respectively connected in series on two sides of a bridge arm, the two clamping diodes are connected in series and respectively connected between the two mos tubes on the two sides of the bridge arm, and the gate of each mos tube is connected with a controller and used for receiving a driving signal of the controller;
the B-phase regulating circuit, the C-phase regulating circuit and the A-phase regulating circuit have the same circuit structure;
and the three regulating circuits are respectively connected with a current transformer, and the current transformers are connected with the controller.
2. The three-phase active current imbalance control circuit for an electric emergency power supply vehicle of claim 1, wherein two inductors are connected in series on each regulating line, and the current transformer on each regulating line is arranged between the two inductors.
3. The three-phase active current imbalance control circuit of the electric emergency power supply vehicle of claim 2, wherein the controller comprises a PWM tracking control circuit, a driving amplification circuit and a command current calculation circuit;
the instruction current computing circuit is respectively connected with the PWM tracking control module and the current transformer;
the PWM tracking control circuit is respectively connected with the driving amplifying circuit and the sampling circuit;
and the drive amplifying circuit is also connected with mos tubes of the phase A adjusting circuit, the phase B adjusting circuit and the phase C adjusting circuit of the adjusting circuit, and is used for receiving and amplifying the PWM drive signal and controlling the switching of the mos tubes.
4. The three-phase active current imbalance control circuit of the electric power emergency power supply vehicle of claim 3, wherein the PWM tracking control circuit is a control circuit adopting a DSP chip.
5. The three-phase active current imbalance control circuit of the electric power emergency power supply vehicle of claim 3, wherein the driving amplification circuit is a driving optocoupler.
6. The three-phase active current imbalance control circuit of the electric power emergency power supply vehicle of claim 3, wherein the circuit further comprises a control display circuit and a communication circuit connected with the control display circuit, and the communication circuit is used for being externally connected with a cloud platform;
the control display circuit is connected with the instruction circuit.
7. The three-phase active current imbalance control circuit of the electric power emergency power supply vehicle of claim 6, wherein the communication circuit comprises a WIFI module and a 4G module which are respectively connected with the control display circuit, and the WIFI module and the 4G module are respectively used for being externally connected with a cloud platform.
8. The three-phase active current imbalance control circuit of an electric power emergency supply vehicle of claim 1, wherein the mos tube is a p-channel enhanced mos tube.
9. The three-phase active current imbalance control circuit of an electric power emergency supply vehicle according to any one of claims 1 to 8, wherein a lightning arrester is further arranged on the adjusting circuit.
10. A three-phase active current imbalance control circuit for an electric power emergency supply vehicle according to any one of claims 1 to 8, wherein the current transformer is further connected to a balanced three-phase line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212154.XU CN218586895U (en) | 2022-08-20 | 2022-08-20 | Three-phase active current unbalance control circuit of electric power emergency power supply vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212154.XU CN218586895U (en) | 2022-08-20 | 2022-08-20 | Three-phase active current unbalance control circuit of electric power emergency power supply vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN218586895U true CN218586895U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222212154.XU Active CN218586895U (en) | 2022-08-20 | 2022-08-20 | Three-phase active current unbalance control circuit of electric power emergency power supply vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN218586895U (en) |
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2022
- 2022-08-20 CN CN202222212154.XU patent/CN218586895U/en active Active
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