CN211669614U - Multi-voltage output power supply - Google Patents

Multi-voltage output power supply Download PDF

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Publication number
CN211669614U
CN211669614U CN202020501004.9U CN202020501004U CN211669614U CN 211669614 U CN211669614 U CN 211669614U CN 202020501004 U CN202020501004 U CN 202020501004U CN 211669614 U CN211669614 U CN 211669614U
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circuit
conversion circuit
power supply
output
current
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张建飞
邓建军
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XI'AN HENGFEI ELECTRONIC TECHNOLOGY CO LTD
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XI'AN HENGFEI ELECTRONIC TECHNOLOGY CO LTD
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Priority to CN202020501004.9U priority Critical patent/CN211669614U/en
Priority to CN202021781823.XU priority patent/CN213987424U/en
Priority to CN202021781820.6U priority patent/CN212846706U/en
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Abstract

The utility model relates to a power, especially a multivoltage output power, characterized by: at least comprises the following steps: the power supply comprises an EMI filter, a detection protection circuit, a first DC/DC conversion circuit, a second DC/DC conversion circuit, a third DC/DC conversion circuit, a fourth DC/DC conversion circuit, a fifth DC/DC conversion circuit, a sixth DC/DC conversion circuit, a sampling circuit, a single chip microcomputer control circuit, an isolation circuit, a power supply output port, a power supply control circuit and a current equalizing circuit, wherein the power supply input circuit is divided into four paths after passing through the EMI filter, the first path enters the input end of the first DC/DC conversion circuit, the second path enters the input end of the second DC/DC conversion circuit, the third path enters the input end of the third DC/DC conversion circuit, and the fourth path enters the input end of the isolation circuit. The multi-voltage output power supply has the capabilities of multi-voltage output power supply fault discrimination, multi-voltage output synchronization and output redundancy.

Description

Multi-voltage output power supply
Technical Field
The utility model relates to a power, especially a multivoltage output power.
Background
The protection functions of overvoltage, overcurrent, short circuit and the like of the power supply are indispensable functional requirements of the power supply.
However, in embedded computer applications, due to the special nature of their use in many applications, the power supply output is often required to have not only multiple outputs but also safe, reliable, redundant and multi-voltage output synchronization for computer applications in a stable and emergency processing capability.
The embedded computer comprises +12V, +5V, +3.3V and +/-12V voltage supplies, and the voltages need to reach stable voltage output after power-on in some cases, so that the system is ensured to be in a stable working state.
Once one of the two paths of voltage is in abnormal operation, the system can work in an abnormal state, so that when one path is abnormal, the other path is required to rapidly provide the same voltage. I.e. the power supply needs to have stability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power failure that has multi-voltage output examines, multi-voltage output is synchronous and export the multi-voltage output power of redundant ability.
The utility model aims at realizing like this, a many voltage output power, characterized by: at least comprises the following steps: the EMI filter, the detection protection circuit, the first DC/DC conversion circuit, the second DC/DC conversion circuit, the third DC/DC conversion circuit, the fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit, the sixth DC/DC conversion circuit, the sampling circuit, the single chip microcomputer control circuit, the isolation circuit, the power output port, the power control circuit and the current equalizing circuit, wherein the power input circuit is divided into four paths after passing through the EMI filter, the first path enters the input end of the first DC/DC conversion circuit, the second path enters the input end of the second DC/DC conversion circuit, the third path enters the input end of the third DC/DC conversion circuit, the fourth path enters the input end of the isolation circuit, the first path of DC/DC conversion circuit outputs 12V direct current voltage, the first path of 12V direct current voltage outputs, the output end of the first DC/DC conversion circuit is divided into four paths, the first path is directly electrically connected with a wiring port of a power supply output port; the second path of 12V output is electrically connected with the input end of the fourth DC/DC conversion circuit, the fourth DC/DC conversion circuit generates +/-12V output, and the +/-12V output is electrically connected with the corresponding wiring port of the power output port;
the third path of the 12V output is electrically connected with the input end of a fifth DC/DC conversion circuit, the fifth DC/DC conversion circuit generates a 3.3V output, and the 3.3V output is electrically connected with a corresponding wiring port of a power output port (12);
the fourth path of 12V output is electrically connected with the input end of a sixth DC/DC conversion circuit, 5V output is generated by the sixth DC/DC conversion circuit, and the 5V output is electrically connected with a corresponding wiring port of a power output port;
the sampling circuit is respectively electrically connected with the output ends of the first DC/DC conversion circuit, the second DC/DC conversion circuit, the third DC/DC conversion circuit, the fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit and the sixth DC/DC conversion circuit and is used for acquiring the real-time output voltage and current of the first DC/DC conversion circuit, the second DC/DC conversion circuit, the third DC/DC conversion circuit, the fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit and the sixth DC/DC conversion circuit, inputting the acquired real-time output voltage and current to the A/D input end of the singlechip control circuit, carrying out signal processing by the singlechip control circuit and providing the signal to the power supply control circuit;
the power supply control circuit is respectively electrically connected with the fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit, the sixth DC/DC conversion circuit and the current-sharing circuit control end and is used for controlling current-sharing current output of the fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit and the sixth DC/DC conversion circuit through the current-sharing circuit.
The fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit and the sixth DC/DC conversion circuit are respectively formed by connecting two groups of same power supplies in parallel with the second power supply and the first power supply to form output, the second power supply and the first power supply respectively comprise a power supply enabling end, the power supply enabling end is respectively electrically connected with the single chip microcomputer control circuit, the single chip microcomputer control circuit controls the second power supply and the first power supply to work simultaneously or in a time-sharing mode, when the working states of the second power supply and the first power supply are normal, the two paths of the second power supply and the first power supply jointly provide current of a load, when one path of the second power supply and the first power supply has a problem, the other path of the second power supply or the first power supply works to provide current of the load, the maximum output current of the second power supply or the first power supply is larger than the.
The second power supply and the first power supply are in normal working states, wherein the first current voltage detection circuit and the second current voltage detection circuit are respectively and electrically connected, the first current voltage detection circuit and the second current voltage detection circuit provide real-time current values for a load, and the singlechip control circuit performs data processing; the singlechip control circuit receives the current and voltage quantities of the first current and voltage detection circuit and the second current and voltage detection circuit as analog quantities, and the analog quantities are converted into digital information by an A/D circuit of the singlechip control circuit and are supplied to a processor in the singlechip control circuit for processing.
The fourth DC/DC conversion circuit, the fifth DC/DC conversion circuit and the sixth DC/DC conversion circuit are respectively formed by connecting two groups of same power supplies in parallel with a second power supply and a first power supply to form output, the output ends of the second power supply and the first power supply are respectively connected in parallel to the input end of a load through a switch tube to form a current sharing circuit, the first PWM circuit and the second PWM circuit formed by the two switch tubes work in a PWM state, the second power supply and the first power supply realize respective power output regulation, when the two power outputs are at working frequencies of 50-100 khz, the duty ratio is 1: 1, the second power supply and the first power supply can respectively output 50% of maximum power, when the conduction time is 60% and the blocking time is 40%, the output power which is 20% larger than that of single output is provided, when one path has a problem, the conduction is closed, and the other path is conducted to form full-power operation.
The first PWM circuit and the second PWM circuit adopt cross conduction work, and when one is conducted, the other is in a non-conduction state at least in part of time.
The utility model has the advantages that:
the utility model discloses make the output actual output power's that each power provided 70%, also be exactly the work of flow equalizing to guarantee the reliability of circuit.
When one path has problems, the fault power supply is switched off to work, the other path works, and the fault power supply state is output through the power supply output port 12. The redundancy capability of the circuit is ensured, and the reliability of the whole power supply is further improved.
As another function of the present invention: synchronization of power output, when the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 are energized by the power input circuit 15, outputs thereof are obtained by the sampling circuit 9, the sampling circuit 9 supplies voltage output information of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 to the single chip microcomputer control circuit 10, and the single chip microcomputer control circuit 10 controls the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, and the third DC/DC conversion circuit 8, The control switches of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 operate to supply a synchronous operating voltage to the load.
Drawings
The present invention will be further explained with reference to the following embodiments and accompanying drawings:
fig. 1 is a schematic circuit diagram of an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the present invention;
in the figure, 1, an EMI filter; 2. detecting a protection circuit; 3. a first DC/DC conversion circuit; 4. a second DC/DC conversion circuit; 5. a third DC/DC conversion circuit; 6. a fourth DC/DC conversion circuit; 7. a fifth DC/DC conversion circuit; 8. a sixth DC/DC conversion circuit; 9. a sampling circuit; 10. a singlechip control circuit; 11. an isolation circuit; 12. a power outlet; 13. a power supply control circuit; and 14, a current equalizing circuit; 15. a power input circuit; 16. a load; 17. a second power supply; 18. a second PWM circuit; 19. a first power supply; 21. a first current-voltage detection circuit; 20. a first PWM circuit; 22. and a second current-voltage detection circuit.
Detailed Description
Example 1
As shown in fig. 1, a multi-voltage output power supply is characterized in that: at least comprises the following steps: an EMI filter 1, a detection protection circuit 2, a first DC/DC conversion circuit 3, a second DC/DC conversion circuit 4, a third DC/DC conversion circuit 5, a fourth DC/DC conversion circuit 6, a fifth DC/DC conversion circuit 7, a sixth DC/DC conversion circuit 8, a sampling circuit 9, a singlechip control circuit 10, an isolation circuit 11, a power output port 12, a power control circuit 13 and a current equalizing circuit 14, wherein a power input circuit 15 is divided into four paths after passing through the EMI filter 1, the first path enters the input end of the first DC/DC conversion circuit 3, the second path enters the input end of the second DC/DC conversion circuit 4, the third path enters the input end of the third DC/DC conversion circuit 5, the fourth path enters the input end of the isolation circuit 11, the first DC/DC conversion circuit 3 outputs 12V direct current voltage, the first path of 12V direct-current voltage is output, the output end of the first DC/DC conversion circuit 3 is divided into four paths, and the first path is directly electrically connected with a wiring port of the power output port 12; the second path of 12V output is electrically connected with the input end of the fourth DC/DC conversion circuit 6, the fourth DC/DC conversion circuit 6 generates +/-12V output, and the +/-12V output is electrically connected with the corresponding wiring port of the power output port 12;
the third path of 12V output is electrically connected with the input end of the fifth DC/DC conversion circuit 7, the fifth DC/DC conversion circuit 7 generates 3.3V output, and the 3.3V output is electrically connected with the corresponding wiring port of the power output port 12;
the fourth path of 12V output is electrically connected with the input end of the sixth DC/ DC conversion circuit 8, 5V output is generated by the sixth DC/DC conversion circuit 8, and the 5V output is electrically connected with the corresponding wiring port of the power output port 12;
the sampling circuit 9 is electrically connected with the output ends of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, and is used for acquiring real-time output voltages and currents of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, inputting the acquired real-time output voltages and currents to the a/D input end of the single chip microcomputer control circuit 10, performing signal processing by the single chip microcomputer control circuit 10, and providing the signals to the power supply control circuit 13;
the power supply control circuit 13 is electrically connected with control ends of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, the sixth DC/DC conversion circuit 8 and the current sharing circuit 14 respectively, and is used for controlling current sharing current output of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8 through the current sharing circuit 14.
Example 2
As shown in fig. 1, a multi-voltage output power supply is characterized in that: at least comprises the following steps: an EMI filter 1, a detection protection circuit 2, a first DC/DC conversion circuit 3, a second DC/DC conversion circuit 4, a third DC/DC conversion circuit 5, a fourth DC/DC conversion circuit 6, a fifth DC/DC conversion circuit 7, a sixth DC/DC conversion circuit 8, a sampling circuit 9, a singlechip control circuit 10, an isolation circuit 11, a power output port 12, a power control circuit 13 and a current equalizing circuit 14, wherein a power input circuit 15 is divided into four paths after passing through the EMI filter 1, the first path enters the input end of the first DC/DC conversion circuit 3, the second path enters the input end of the second DC/DC conversion circuit 4, the third path enters the input end of the third DC/DC conversion circuit 5, the fourth path enters the input end of the isolation circuit 11, the first DC/DC conversion circuit 3 outputs 12V direct current voltage, the first path of 12V direct-current voltage is output, the output end of the first DC/DC conversion circuit 3 is divided into four paths, and the first path is directly electrically connected with a wiring port of the power output port 12; the second path of 12V output is electrically connected with the input end of the fourth DC/DC conversion circuit 6, the fourth DC/DC conversion circuit 6 generates +/-12V output, and the +/-12V output is electrically connected with the corresponding wiring port of the power output port 12;
the third path of 12V output is electrically connected with the input end of the fifth DC/DC conversion circuit 7, the fifth DC/DC conversion circuit 7 generates 3.3V output, and the 3.3V output is electrically connected with the corresponding wiring port of the power output port 12;
the fourth path of 12V output is electrically connected with the input end of the sixth DC/ DC conversion circuit 8, 5V output is generated by the sixth DC/DC conversion circuit 8, and the 5V output is electrically connected with the corresponding wiring port of the power output port 12;
the sampling circuit 9 is respectively electrically connected with the output ends of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, and is used for acquiring the real-time output voltage and current of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, inputting the acquired real-time output voltage and current to the a/D input end of the single chip microcomputer control circuit 10, performing signal processing by the single chip microcomputer control circuit 10 and providing the signal to the power supply control circuit 13;
the power supply control circuit 13 is electrically connected with control ends of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, the sixth DC/DC conversion circuit 8 and the current sharing circuit 14 respectively, and is used for controlling current sharing current output of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8 through the current sharing circuit 14.
As shown in fig. 2，The fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8 are respectively formed by connecting two groups of same power supplies, namely a second power supply 17 and a first power supply 19 in parallel to form output, the second power supply 17 and the first power supply 19 respectively comprise a power supply enabling end, the power supply enabling ends are respectively electrically connected with the single chip microcomputer control circuit 10, the single chip microcomputer control circuit 10 controls the second power supply 17 and the first power supply 19 to work simultaneously or in a time-sharing mode, when the working states of the second power supply 17 and the first power supply 19 are normal, the two paths of the second power supply 17 and the first power supply 19 jointly provide current of the load 16, when one path of the second power supply 17 and the first power supply 19 has a problem, the other path of the second power supply 17 and the first power supply 19 work to provide current of the load 16, and the maximum output current of the second power supply 17 or the first power supply.
The second power supply 17 and the first power supply 19 are normally operated by a first current and voltage detection circuit 21 and a second current and voltage detection circuit 22 which are respectively and electrically connected, and the first current and voltage detection circuit 21 and the second current and voltage detection circuit 22 provide real-time current values supplied to the load 16, and the singlechip control circuit 10 performs data processing. The current and voltage quantities received by the single chip control circuit 10 from the first current and voltage detection circuit 21 and the second current and voltage detection circuit 22 are analog quantities, and are converted into digital information by the a/D circuit of the single chip control circuit 10 and supplied to a processor therein for processing.
Example 3
As shown in fig. 1, a multi-voltage output power supply is characterized in that: at least comprises the following steps: an EMI filter 1, a detection protection circuit 2, a first DC/DC conversion circuit 3, a second DC/DC conversion circuit 4, a third DC/DC conversion circuit 5, a fourth DC/DC conversion circuit 6, a fifth DC/DC conversion circuit 7, a sixth DC/DC conversion circuit 8, a sampling circuit 9, a singlechip control circuit 10, an isolation circuit 11, a power output port 12, a power control circuit 13 and a current equalizing circuit 14, wherein a power input circuit 15 is divided into four paths after passing through the EMI filter 1, the first path enters the input end of the first DC/DC conversion circuit 3, the second path enters the input end of the second DC/DC conversion circuit 4, the third path enters the input end of the third DC/DC conversion circuit 5, the fourth path enters the input end of the isolation circuit 11, the first DC/DC conversion circuit 3 outputs 12V direct current voltage, the first path of 12V direct-current voltage is output, the output end of the first DC/DC conversion circuit 3 is divided into four paths, and the first path is directly electrically connected with a wiring port of the power output port 12; the second path of 12V output is electrically connected with the input end of the fourth DC/DC conversion circuit 6, the fourth DC/DC conversion circuit 6 generates +/-12V output, and the +/-12V output is electrically connected with the corresponding wiring port of the power output port 12;
the third path of 12V output is electrically connected with the input end of the fifth DC/DC conversion circuit 7, the fifth DC/DC conversion circuit 7 generates 3.3V output, and the 3.3V output is electrically connected with the corresponding wiring port of the power output port 12;
the fourth path of 12V output is electrically connected with the input end of the sixth DC/ DC conversion circuit 8, 5V output is generated by the sixth DC/DC conversion circuit 8, and the 5V output is electrically connected with the corresponding wiring port of the power output port 12;
the sampling circuit 9 is respectively electrically connected with the output ends of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, and is used for acquiring the real-time output voltage and current of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8, inputting the acquired real-time output voltage and current to the a/D input end of the single chip microcomputer control circuit 10, performing signal processing by the single chip microcomputer control circuit 10 and providing the signal to the power supply control circuit 13;
the power supply control circuit 13 is electrically connected with control ends of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, the sixth DC/DC conversion circuit 8 and the current sharing circuit 14 respectively, and is used for controlling current sharing current output of the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8 through the current sharing circuit 14.
As shown in fig. 3，The fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7 and the sixth DC/DC conversion circuit 8 are respectively formed by connecting two groups of same power supplies, namely a second power supply 17 and a first power supply 19 in parallel to form an output, the output ends of the second power supply 17 and the first power supply 19 are respectively connected to the input end of a load 16 in parallel through a switch tube to form a current sharing circuit 14, a first PWM circuit 20 and a second PWM circuit 18 formed by two switch tubes work in a PWM state, the second power supply 17 and the first power supply 19 realize respective power output regulation, when the two are in working frequencies of 50-100 khz, the duty ratio is 1: 1, the second power supply 17 and the first power supply 19 can respectively output 50% of maximum power, when the conduction time is 60% and the blocking time is 40%, the output power which is 20% larger than that of a single output is provided, when one path has a problem, the conduction is closed, and the other path is conducted to form full-power operation.
The first PWM circuit 20 and the second PWM circuit 18 operate in a cross conduction mode, one conducting and the other non-conducting for at least a portion of the time to stabilize the output.
The maximum benefit of the working mode is that the output power provided by each power supply is only 70% of the actual output power, namely, the current sharing work is carried out, so as to ensure the reliability of the circuit, when one path has a problem, the fault power supply is switched off, the other path works, and the fault power supply state is output through the power supply output port 12.
As another function of the present invention: as shown in FIGS. 1 and 3, when the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 are energized by the power input circuit 15, the outputs thereof are obtained by the sampling circuit 9, the sampling circuit 9 supplies the voltage output information of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 to the singlechip control circuit 10, and the singlechip control circuit 10 controls the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the sixth DC/DC conversion circuit 8, and the singlechip control circuit 10, The control switches of the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 operate to supply a synchronous operating voltage to the load.
The switching control operations of the first DC/DC conversion circuit 3, the second DC/DC conversion circuit 4, the third DC/DC conversion circuit 5, the fourth DC/DC conversion circuit 6, the fifth DC/DC conversion circuit 7, and the sixth DC/DC conversion circuit 8 controlled by the one-chip microcomputer control circuit 10 are actually realized by the operations of the first PWM circuit 20 and the second PWM circuit 18 described above.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.

Claims (5)

1. A multi-voltage output power supply is characterized in that: at least comprises the following steps: an EMI filter (1), a detection protection circuit (2), a first DC/DC conversion circuit (3), a second DC/DC conversion circuit (4), a third DC/DC conversion circuit (5), a fourth DC/DC conversion circuit (6), a fifth DC/DC conversion circuit (7), a sixth DC/DC conversion circuit (8), a sampling circuit (9), a singlechip control circuit (10), an isolation circuit (11), a power output port (12), a power control circuit (13) and a current equalizing circuit (14), wherein a power input circuit (15) is divided into four circuits after passing through the EMI filter (1), the first circuit enters the input end of the first DC/DC conversion circuit (3), the second circuit enters the input end of the second DC/DC conversion circuit (4), and the third circuit enters the input end of the third DC/DC conversion circuit (5), the fourth path enters the input end of the isolation circuit (11), the first path of DC/DC conversion circuit (3) outputs 12V direct current voltage, the first path of 12V direct current voltage outputs, the output end of the first DC/DC conversion circuit (3) is divided into four paths, and the first path is directly electrically connected with the wiring port of the power output port (12); the second path of 12V output is electrically connected with the input end of a fourth DC/DC conversion circuit (6), the fourth DC/DC conversion circuit (6) generates +/-12V output, and the +/-12V output is electrically connected with a corresponding wiring port of a power output port (12);
the third path of the 12V output is electrically connected with the input end of a fifth DC/DC conversion circuit (7), the fifth DC/DC conversion circuit (7) generates a 3.3V output, and the 3.3V output is electrically connected with a corresponding wiring port of a power output port (12);
the fourth path of 12V output is electrically connected with the input end of a sixth DC/DC conversion circuit (8), 5V output is generated by the sixth DC/DC conversion circuit (8), and the 5V output is electrically connected with a corresponding wiring port of a power output port (12);
the sampling circuit (9) is respectively electrically connected with the output ends of the first DC/DC conversion circuit (3), the second DC/DC conversion circuit (4), the third DC/DC conversion circuit (5), the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7) and the sixth DC/DC conversion circuit (8) and is used for acquiring the real-time output voltage and current of the first DC/DC conversion circuit (3), the second DC/DC conversion circuit (4), the third DC/DC conversion circuit (5), the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7) and the sixth DC/DC conversion circuit (8), inputting the acquired real-time output voltage and current to the A/D input end of the singlechip control circuit (10), and carrying out signal processing by the singlechip control circuit (10), to a power supply control circuit (13);
the power supply control circuit (13) is respectively electrically connected with the control ends of the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7), the sixth DC/DC conversion circuit (8) and the current-sharing circuit (14) and is used for controlling the current-sharing current output of the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7) and the sixth DC/DC conversion circuit (8) through the current-sharing circuit (14).
2. A multi-voltage output power supply according to claim 1, wherein: the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7) and the sixth DC/DC conversion circuit (8) are respectively connected in parallel by two groups of same power supplies, namely a second power supply (17) and a first power supply (19) to form output, the second power supply (17) and the first power supply (19) respectively comprise a power supply enabling end, the power supply enabling ends are respectively and electrically connected with the singlechip control circuit (10), the singlechip control circuit (10) controls the second power supply (17) and the first power supply (19) to simultaneously work or work in a time-sharing mode, when the working states of the second power supply (17) and the first power supply (19) are normal, two paths of the second power supply and the first power supply jointly provide current of the load (16), when one path has a problem, the other path of the second power supply (17) or the first power supply (19) works to provide current of the load (16), and the maximum output current of the second power supply (17) or the first power supply (19) is larger than, this provides redundancy from the second power supply (17) and the first power supply (19).
3. A multi-voltage output power supply according to claim 2, wherein: the second power supply (17) and the first power supply (19) are in normal working state, a first current and voltage detection circuit (21) and a second current and voltage detection circuit (22) are respectively and electrically connected, the first current and voltage detection circuit (21) and the second current and voltage detection circuit (22) give a real-time current value supplied to a load (16), and a singlechip control circuit (10) is used for carrying out data processing; the singlechip control circuit (10) receives the current and voltage quantities of the first current and voltage detection circuit (21) and the second current and voltage detection circuit (22) as analog quantities, and the analog quantities are converted into digital information by an A/D circuit of the singlechip control circuit (10) and are supplied to a processor in the singlechip control circuit for processing.
4. A multi-voltage output power supply according to claim 1, wherein: the fourth DC/DC conversion circuit (6), the fifth DC/DC conversion circuit (7) and the sixth DC/DC conversion circuit (8) are respectively connected in parallel by two groups of same power supplies, namely a second power supply (17) and a first power supply (19) to form output, the output ends of the second power supply (17) and the first power supply (19) are respectively connected in parallel to the input end of a load (16) through a switch tube to form a current-sharing circuit (14), a first PWM circuit (20) and a second PWM circuit (18) formed by the two switch tubes work in a PWM state, the second power supply (17) and the first power supply (19) realize respective power output regulation, and when the two are at working frequencies of 50-100 khz, the duty ratio is 1: 1, the second power supply (17) and the first power supply (19) can respectively output 50% of maximum power, when the conduction time is 60% and the blocking time is 40%, the output power which is 20% larger than that of single output is provided, when one path has a problem, the conduction is closed, and the other path is conducted to form full-power operation.
5. A multi-voltage output power supply according to claim 4, wherein: the first PWM circuit (20) and the second PWM circuit (18) adopt cross conduction operation, and when one is conducted, the other is in a non-conduction state at least part of the time.
CN202020501004.9U 2020-04-08 2020-04-08 Multi-voltage output power supply Active CN211669614U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202020501004.9U CN211669614U (en) 2020-04-08 2020-04-08 Multi-voltage output power supply
CN202021781823.XU CN213987424U (en) 2020-04-08 2020-04-08 Synchronization circuit for power supply output
CN202021781820.6U CN212846706U (en) 2020-04-08 2020-04-08 Power current-sharing management power supply

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