TWI799002B - Automatic voltage equalization and current equalization control circuit for multi-machine series and parallel output of power supply - Google Patents

Abstract

The automatic voltage equalization and current equalization control circuit has a feedback module, including: an output current feedback circuit that receives a feedback output current and a current feedback command; a voltage follower circuit that receives a voltage feedback command or an external feedback output voltage ; An output voltage feedback circuit, receiving a feedback output voltage and a feedback command output by a voltage follower circuit, and outputting a bus voltage, and an inductor current feedback circuit, receiving a feedback inductor current and the bus voltage of the output voltage feedback circuit, And output a duty cycle voltage; wherein the bus voltage can be combined with an external bus voltage; the voltage of a current feedback command input terminal of the output current feedback circuit and the voltage of a voltage feedback command input terminal of the voltage follower circuit are both jointly determine a common voltage.

Description

Automatic voltage equalization and current equalization control circuit for multi-machine series and parallel output of power supply

A multi-machine output control circuit of a power supply, especially an automatic voltage and current equalization control circuit for multi-machine series-parallel output of a power supply.

In today's market, it is very common for a single power supply to provide DC power, and in order to meet the needs of various load voltages and load currents, users often need to connect multiple power supplies in series to provide higher load voltages, or use Multiple power supplies are connected in parallel to provide higher load current, or even multiple power supplies are combined in series and parallel at the same time to provide higher load voltage and load current, but the output voltage/current of each power supply is not completely The same, especially when the load changes, it is more difficult to control the voltage or current output between each power supply. At present, when multiple power supplies are connected in series and parallel, the common technical problems include:

1. Generally, when connecting in series or in parallel, it is necessary to adjust the circuit or parameters of the single unit according to the actual situation, which is inconvenient in application.

2. Generally, there are more control signals in series or parallel connection, and the wiring and control are more complicated.

3. The output characteristics of series-parallel power supplies under dynamic load conditions are prone to asynchrony, which may occur in a transient moment, making the output circuit/output current/output power of some power supplies exceed the rated specifications.

4. It is difficult to apply multiple power supplies in series and parallel at the same time.

5. The maximum number of power supplies connected in parallel is easily limited.

6. The current accuracy will become worse due to the increase in the number of power supplies connected in parallel.

7. The total power after series-parallel combination is easy to be discounted, so it is necessary to increase the power of the power supply or increase the number of series-parallel power supplies to meet the required power specifications.

8. When working in constant current mode (CC mode), the number of power supplies connected in parallel increases, and instability is likely to occur.

9. The circuit characteristics of power supplies connected in parallel are easily affected by the actual wiring method and the difference in line resistance.

Therefore, there is an urgent need to solve the above-mentioned problem of multiple power supplies connected in series and parallel.

In order to solve the above problems, the present invention uses a power supply multi-machine output series-parallel automatic voltage equalization and current equalization control circuit, which can provide the following advantages:

1. Reduce the complexity of parallel control and wiring: make the power supply under the condition of "current source operation" to connect multiple sets of power supplies in parallel, which can greatly reduce the uneven current problem caused by the output voltage deviation between the power supplies , and can simplify parallel control and wiring.

2. Reduce the complexity of series control and wiring: make the power supply connect multiple sets of power supplies in series under the condition of "voltage source operation", which can greatly reduce the uneven voltage problem caused by the output current deviation between the power supplies , and can simplify the control and wiring in series.

3. Reduce the complexity of simultaneous series-parallel control: Same as the above 1 and 2 points, if the power supply can also be applied in series-parallel combination under the conditions of "current source operation" or "voltage source operation" individually, the unnecessary Current and uneven voltage phenomenon, and simplify the control and wiring methods.

4. Maintain the total series-parallel power = single unit power of power supply × number of series-parallel units: when common power supplies are used in series-parallel connection, the total series-parallel power = single unit power of power supply × number of series-parallel units × number of series-parallel connections, the The number of series and parallel connections is less than 1, so it is necessary to increase the power of a single power supply or the number of series and parallel connections to meet the required specifications. The "automatic voltage equalization and current equalization control circuit" proposed by the present invention can make the series-parallel connection number 1, so there is no need to design a larger power supply or increase the number of series-parallel connections to meet the required specifications.

5. Reduce the oscillation phenomenon of dynamic loads in parallel applications: the dynamic loads of common parallel circuits are prone to follow-up unstable oscillations. However, the parallel connection method proposed by the present invention can still maintain the better characteristic of automatic output current sharing among the parallel connected power sources under dynamic load.

6. It is easier to modularize the power supply: use the "external" control command of the shared current command or voltage command to do the combined application of series and parallel, which does not directly affect the "internal" circuit action of the power module, and it is easier to implement the power supply Modularization and independence.

7. Elimination of adjustments for series-parallel combination applications: due to changing the "external" control command method for series-parallel combination applications, the production end does not need to make any adjustments to the circuit or compensator parameters for different models after series-parallel connection. The client can allow customers to set up to meet their needs.

8. There is no limit to the number of series and parallel connections (the control circuit itself of the present invention is not limited, but the overall series and parallel connection will still be limited by power components): due to the change of the "external" control command method for combined application of series and parallel connections, the overall The action is not affected by the application of series-parallel combination, and can maintain the same characteristics of the single power supply and the whole after series-parallel connection.

9. Simple series-parallel connection setting method: In the case of the same power supply specification for series-parallel connection, the combined application of series-parallel connection can be completed by switching the corresponding control command according to the demand.

The main technical means of the multi-machine output series-parallel automatic voltage and current equalization control circuit of the power supply of the present invention includes: a feedback module, which is used for the automatic voltage and current equalization control circuit of the power supply multi-machine series-parallel output, the feedback module Including: an output current feedback circuit, with an output current feedback input terminal to receive a feedback output current, a current feedback command input terminal to receive a current feedback command Icommand or a control command Vstb, and an output terminal; a voltage follower circuit , having a voltage feedback command input terminal for receiving a voltage feedback command Vcommand or an external feedback output voltage, and an output terminal; An output voltage feedback circuit has an output voltage feedback input end for receiving a feedback output voltage, a second input end, and a bus output end for outputting a bus voltage, the second input end of the output voltage feedback circuit, the The output end of the output current feedback circuit and the output end of the voltage follower circuit are electrically connected; and an inductor current feedback circuit has an inductor current feedback input end to receive a feedback inductor current, a third input end, and a duty cycle voltage output end to output a duty cycle voltage, the third input end of the inductor current feedback circuit is electrically connected to the bus output end of the output voltage feedback circuit; wherein the bus output end can be connected to a The external bus output terminal is electrically connected; wherein, the output terminal of the output current feedback circuit and the output terminal of the voltage follower circuit select one action to output a connection point voltage VP4, and the connection point voltage VP4 is determined by the output current feedback circuit. The voltage at the input terminal of the current feedback command and the voltage at the input terminal of the voltage feedback command of the voltage follower circuit are jointly determined: the connection point voltage VP4 follows the output voltage of the output terminal of the output current feedback circuit or follows the voltage follower circuit The output voltage of the output terminal.

Preferably, the voltage at the input terminal of the current feedback command of the output current feedback circuit can affect the output voltage of the output terminal of the output current feedback circuit, so that when the voltage at the connection point VP4 is greater than or equal to the voltage feedback command of the voltage follower circuit When the voltage of the input terminal is low, the voltage VP4 of the connection point will be pulled down and clamped at the voltage of the voltage feedback command input terminal of the voltage follower circuit, and when the voltage VP4 of the connection point is lower than the voltage feedback command input terminal of the voltage follower circuit When the voltage is lower than the voltage, the voltage follower circuit does not act. At this time, the connection point voltage VP4 follows the output voltage of the output terminal of the output current feedback circuit.

Preferably, the output current feedback circuit includes: a first comparator, the first comparator has a positive terminal input connected to the current feedback command input terminal, and a negative terminal input connected to one terminal of an input impedance ZCI and a One end of the feedback impedance ZCO, the other end of the input impedance ZCI is connected to The output current feedback input terminal, the other end of the feedback impedance ZCO is connected to the output terminal of the output current feedback circuit, and the first comparator has an output terminal connected to the output terminal of the output current feedback circuit through a resistor RC.

Preferably, the voltage follower circuit includes: a transistor, and a comparator, the comparator has a positive input connected to the voltage feedback command input, and the comparator has a negative input connected to the emitter of the transistor At the same time, it is connected to the output terminal of the output current feedback circuit. The comparator has an output terminal connected to the base of the transistor, and the collector of the transistor is grounded.

Preferably, the output voltage feedback circuit includes: a second comparator, the second comparator has a positive terminal input connected to the output terminal of the output current feedback circuit and grounded through a resistor RV and a capacitor CV connected in parallel, the The second comparator has a negative input connected to one end of an input impedance ZBI and one end of a feedback impedance ZBO, the other end of the input impedance ZBI is connected to the output voltage feedback input end, and the other end of the feedback impedance ZBO can be selectively connected to the output terminal of the output voltage feedback circuit or an output terminal of the second comparator, and the output terminal of the second comparator is connected to the bus output terminal through a resistor RB.

Preferably, the inductor current feedback circuit includes: a third comparator, the third comparator has a positive terminal input connected to the bus output terminal and connected to the ground in parallel through a resistor RI and a capacitor CI, the comparator has a negative terminal The input is connected to one end of an input impedance ZAI and one end of a feedback impedance ZAO, the other end of the input impedance ZAI is connected to the inductor current feedback input end, and the other end of the feedback impedance ZAO can be selectively connected to the working The cycle voltage output terminal or an output terminal of the third comparator, the output terminal of the third comparator is connected to the duty cycle voltage output terminal via a resistor RA, and the duty cycle voltage output terminal is connected in parallel to a resistor RD and a capacitor CD grounded.

Preferably, the resistor RV and the capacitor CV connected in parallel can be selectively removed, and the resistor RB can also be selectively deleted (that is, the resistance of the resistor RB is 0).

Preferably, the resistor RI and the capacitor CI connected in parallel can be selectively removed, the resistor RD and the capacitor CD connected in parallel can also be selectively removed, and the resistor RA can also be selectively deleted ( That is, the resistance of the resistor RA is 0).

Corresponding to a second A embodiment (internal series and external series) and its promotion, the present invention also discloses an automatic voltage equalization and current equalization control circuit for multi-unit series and parallel output of power supplies, which consists of N feedback modules as mentioned above N is an integer greater than or equal to 4. The series-parallel automatic voltage and current equalization control circuit includes: a first to a Nth feedback module, N is an integer greater than or equal to 4, the first to the Nth The feedback module has a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a Nth output current feedback input terminal, a first to a Nth output current feedback input terminal, a first to a first N current feedback command input terminals, one first to one Nth voltage feedback command input terminals, one first to one Nth duty cycle voltage output terminals; wherein the first to the Nth inductance current feedback input terminals receive a first to the Nth inductor current feedback input terminals respectively One to one Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; the first to the Nth output current feedback input terminals respectively receive a first One to one Nth feedback output current; the first current feedback command input terminal receives a current feedback command Icommand; the second to the Nth current feedback command input terminals all receive a control command Vstb; the first voltage feedback command input The terminal receives a voltage feedback command Vcommand; the second, third, fifth, seventh, ninth, eleventh, ... (increase by two in the following order) voltage feedback command input terminal receives the first A feedback output voltage; the fourth, the sixth, the eighth, the tenth... (increased by two in the following order) voltage feedback command input terminals respectively receive the third, the fifth, the seventh, the Ninth, the eleventh, ... (increase two in order below) feedback output voltage; The voltage output terminals of the first to the Nth duty cycle respectively output a voltage of the first to the Nth duty cycle; wherein, the range of the voltage feedback command Vcommand and the current feedback command Icommand can be an adjustable voltage from 0V to VDD, The control command Vstb is VDD, and VDD is a fixed voltage value.

Corresponding to a third embodiment (internal and external parallel) and its promotion, the present invention also discloses an automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of power supplies, which consists of N feedback modules as mentioned above N is an integer greater than or equal to 4, and the automatic voltage and current equalization control circuit includes: a first to a Nth feedback module, N is an integer greater than or equal to 4, the first to the Nth feedback module Respectively have a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a Nth output current feedback input terminal, a first to a Nth current feedback input terminal, a first to a Nth current feedback input terminal A command input terminal, a first to a Nth voltage feedback command input terminal, a first to a Nth duty cycle voltage output terminal, a first to a Nth bus output terminal; wherein the first to the Nth inductance The current feedback input terminals respectively receive a first to the Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; the first to the Nth output The current feedback input terminals respectively receive a first to the Nth feedback output current; the first to the Nth current feedback command input terminals all receive a current feedback command Icommand; the first to the Nth voltage feedback command input terminals all receive receiving a voltage feedback command Vcommand; the first to the Nth bus output terminals are connected together; The voltage output terminals of the first to the Nth duty cycle respectively output a voltage of the first to the Nth duty cycle; wherein, the range of the voltage feedback command Vcommand and the current feedback command Icommand can be an adjustable voltage from 0V to VDD, VDD is a fixed voltage value.

Corresponding to a first embodiment (internal series and external parallel) and its promotion, the present invention also discloses an automatic voltage equalization and current equalization control circuit for multi-unit series and parallel output of power supplies, which consists of N feedback modules as mentioned above N is an even number greater than or equal to 4, the automatic voltage equalization and current equalization control circuit includes: a first to a Nth feedback module, N is an even number greater than or equal to 4, the first to the Nth feedback module Respectively have a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a Nth output current feedback input terminal, a first to a Nth current feedback input terminal, a first to a Nth current feedback input terminal A command input terminal, a first to a Nth voltage feedback command input terminal, a first to a Nth duty cycle voltage output terminal, a first to a Nth bus output terminal; wherein the first to the Nth inductance The current feedback input terminals respectively receive a first to the Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; the first to the Nth output The current feedback input terminals respectively receive a first to a Nth feedback output current; the first, the third, the fifth, the seventh, ... (increase by two in the following order) the current feedback instruction input terminals all receive A current feedback command Icommand; the first, the third, the fifth, the seventh, ... (increase two in the following order) voltage feedback command input terminals all receive a voltage feedback command Vcommand; the second, the The fourth, the sixth, the eighth, ... (increase two in order below) the current feedback command input terminals all receive a control command Vstb; The second, the fourth, the sixth, the eighth, ... (increase by two in the following order) voltage feedback command input terminals respectively receive the first, the third, the fifth, the seventh,. .. (increase two in order below) feedback output voltage; the first, the third, the fifth, the seventh, ... (increase two in order below) the bus output terminals are connected together; the first To the Nth duty cycle voltage output terminal respectively output a first to a Nth duty cycle voltage; wherein, the range of the voltage feedback command Vcommand and the current feedback command Icommand can be an adjustable voltage from 0V to VDD, and the control The command Vstb is VDD, and VDD is a fixed voltage value.

Corresponding to a fourth embodiment (internal parallel external series) and its promotion, the present invention also discloses an automatic voltage equalization and current equalization control circuit for multi-unit series and parallel output of power supplies, which consists of N feedback modules as mentioned above N is an even number greater than or equal to 4, the automatic voltage equalization and current equalization control circuit includes: a first to a Nth feedback module, N is an even number greater than or equal to 4, the first to the Nth feedback module Respectively have a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a Nth output current feedback input terminal, a first to a Nth current feedback input terminal, a first to a Nth current feedback input terminal A command input terminal, a first to a Nth voltage feedback command input terminal, a first to a Nth duty cycle voltage output terminal, a first to a Nth bus output terminal; wherein the first to the Nth inductance The current feedback input terminals respectively receive a first to the Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; the first to the Nth output The current feedback input terminals respectively receive a first to an Nth feedback output current; the first and the second current feedback command input terminals both receive a current feedback command Icommand; The third to the Nth current feedback command input terminals all receive a control command Vstb; the first and the second voltage feedback command input terminals both receive a voltage feedback command Vcommand; the third to the Nth voltage feedback command input terminals all receive a control command Vstb. Receive the first feedback output voltage; the first and the second, the third and the fourth, the fifth and the sixth, the seventh and the eighth, ... (following in sequence) bus output The terminals are connected together; the first to the Nth duty cycle voltage output terminals respectively output a first to a Nth duty cycle voltage; wherein, the range of the voltage feedback command Vcommand and the current feedback command Icommand can be 0V~ VDD is an adjustable voltage, and the control command Vstb is VDD, and VDD is a fixed voltage.

In one embodiment, the present invention also discloses a power supply unit, which includes the aforementioned feedback module, and the power supply unit further includes: a DC power supply module, which converts an external power supply into a unit output voltage, and generates A feedback output voltage, a feedback output current, and a feedback inductor current; and a feedback module connected to the DC power supply module; wherein the DC power supply module includes: a V+ voltage output terminal and a V- voltage output terminal , used to output the unit output voltage; an output voltage feedback output terminal, which is connected with the output voltage feedback input terminal of the feedback module to output the feedback output voltage to the feedback module; an output current feedback output terminal, which is connected with the feedback input terminal of the feedback module The output current feedback input end of the feedback module is connected to output the feedback output current to the feedback module; an inductor current feedback output end is connected to the inductor current feedback input end of the feedback module to output the feedback inductor current to the feedback module. The feedback module; a duty cycle voltage input terminal is connected to the duty cycle voltage output end of the feedback module to input a duty cycle voltage from the feedback module; wherein The DC power supply module converts the external power supply into the unit output voltage based on the working cycle voltage; the power supply unit also includes: a unit voltage feedback command input terminal connected to the voltage feedback command input terminal of the feedback module; a A unit current feedback command input terminal is connected to the current feedback command input terminal of the feedback module; a unit output voltage feedback output terminal is connected to the output voltage feedback output terminal of the DC power supply module; a unit confluence output terminal is connected to the The bus output terminal of the feedback module; and a unit voltage output terminal group are composed of the V+ voltage output terminal and the V-voltage output terminal of the DC power supply module to output the unit output voltage.

In one embodiment, the present invention also discloses a single power supply unit (internally connected in series), which is composed of the aforementioned power supply unit. The single power supply unit includes: a first power supply unit, which converts an external power supply into a first unit Output voltage; a second power supply unit, which converts an external power supply into a second unit output voltage; a stand-alone voltage output terminal group, which is output by the unit voltage output terminal group of the first power supply unit and the unit voltage output of the second power supply unit The terminal groups are connected in series to output a stand-alone output voltage; through a series configuration mode, the unit voltage feedback command input terminals, unit current feedback command input terminals, and unit output voltage feedback of the first and second power supply units are respectively output terminal to set its voltage or set its connection relationship with each other, so that the output voltage of the first unit and the output voltage of the second unit can be connected in series to form the output voltage of the single unit, and then output the output voltage through the output terminal group of the single unit Stand-alone output voltage; the power supply stand-alone also includes: a single-unit first voltage feedback command input terminal connected to the unit voltage feedback command input terminal of the first power supply unit; A single unit second voltage feedback command input terminal connected to the unit voltage feedback command input terminal of the second power supply unit; a single unit first current feedback command input terminal connected to the unit current feedback command input terminal of the first power supply unit; A single unit second current feedback command input terminal connected to the unit current feedback command input terminal of the second power supply unit; a single unit output voltage feedback output terminal connected to the unit output voltage feedback output terminal of the first power supply unit; and a The single unit bus output end is connected to the unit bus output end of the first power supply unit.

In one embodiment, the present invention also discloses a single power supply unit (internal parallel connection), which is composed of the aforementioned power supply unit. The single power supply unit includes: a first power supply unit, which converts an external power supply into a first unit Output voltage; a second power supply unit, which converts an external power supply into a second unit output voltage; a stand-alone voltage output terminal group, which is output by the unit voltage output terminal group of the first power supply unit and the unit voltage output of the second power supply unit The terminal groups are connected in parallel to output a stand-alone output voltage; wherein the first and second power supply units are respectively unit voltage feedback command input terminals, unit current feedback command input terminals, and unit output voltage feedback output terminals through a parallel setting mode. , and unit confluence output terminals to set its voltage or set its connection relationship with each other, so that the output voltage of the first unit and the output voltage of the second unit can be connected in parallel to form the output voltage of the single unit, and then output through the voltage of the single unit The terminal group outputs the output voltage of the stand-alone unit; the stand-alone power supply also includes: a first voltage feedback command input terminal of the stand-alone unit, connected to the unit voltage feedback command input terminal of the first power supply unit; A single unit second voltage feedback command input terminal connected to the unit voltage feedback command input terminal of the second power supply unit; a single unit first current feedback command input terminal connected to the unit current feedback command input terminal of the first power supply unit; A single unit second current feedback command input terminal connected to the unit current feedback command input terminal of the second power supply unit; a single unit output voltage feedback output terminal connected to the unit output voltage feedback output terminal of the first power supply unit; and a The single unit bus output end is connected to the unit bus output end of the first power supply unit.

In one embodiment, the present invention also discloses a multi-machine output combination of a power supply, which is composed of a single power supply (internal parallel connection and/or internal series connection) as described above; the multi-machine output combination of a power supply includes: at least two A power supply stand-alone, each of the at least two power supply stand-alones converts an external power supply into a separate stand-alone output voltage; a multi-machine voltage output terminal group, formed by each of the at least two power supply stand-alone A set of single-machine voltage output terminals is jointly formed to output a multi-machine output voltage; wherein, each of the at least two power supply single-machines is fed back to the command input terminal of the first voltage of the single-machine and the second voltage of the single-machine through a setting mode The feedback command input terminal, the first single-machine current feedback command input terminal, the single-machine second current feedback command input terminal, the single-machine output voltage feedback output terminal, and the single-machine converging output terminal are used to set the voltage or the connection relationship between them, and The stand-alone voltage output terminal groups of each of the at least two power supply stand-alone machines are connected in series, parallel, or series-parallel, so that the stand-alone output voltage of each of the at least two power supply stand-alone machines can be connected in series, parallel, or a combination of series and parallel to form the multi-machine output voltage, and then output the multi-machine output voltage through the multi-machine voltage output terminal group.

To sum up, the present invention is used for the automatic voltage equalization and current equalization control circuit of multiple power supply units in series and parallel output, which can make the output voltage series connection, The mixing of parallel connection and series parallel connection can reach the purpose of the present invention.

1: Automatic voltage equalization and current equalization control circuit for multi-machine series and parallel output of power supply

10: The first feedback module

11: Inductor current feedback input terminal

12: Output current feedback input terminal

13: Output voltage feedback input terminal

14: Current feedback command input terminal

15: Voltage feedback command input terminal

16: Duty cycle voltage output terminal

17: Confluence output terminal

20: The second feedback module

21: Inductor current feedback input terminal

22: Output current feedback input terminal

23: Output voltage feedback input terminal

24: Current feedback command input terminal

25: Voltage feedback command input terminal

26: Duty cycle voltage output terminal

27: Confluence output terminal

30: The third feedback module

31: Inductor current feedback input terminal

32: Output current feedback input terminal

33: Output voltage feedback input terminal

34: Current feedback command input terminal

35: Voltage feedback command input terminal

36: Duty cycle voltage output terminal

37: Confluence output terminal

40: The fourth feedback module

41: Inductor current feedback input terminal

42: Output current feedback input terminal

43: Output voltage feedback input terminal

44: Current feedback command input terminal

45: Voltage feedback command input terminal

46: Duty cycle voltage output terminal

47: Confluence output terminal

50: The first DC power supply module

51: V+ voltage output terminal

52:V-voltage output terminal

53: Output voltage feedback output terminal

54: output current feedback output terminal

55: Inductor current feedback output terminal

56: Duty cycle voltage input terminal

60: Second DC power supply module

61: V+ voltage output terminal

62:V-voltage output terminal

63: output voltage feedback output terminal

64: output current feedback output terminal

65: Inductor current feedback output terminal

66: Duty cycle voltage input terminal

70: The third DC power module

71: V+ voltage output terminal

72: V-voltage output terminal

73: output voltage feedback output terminal

74: output current feedback output terminal

75: Inductor current feedback output terminal

76: Duty cycle voltage input terminal

80: The fourth DC power module

81: V+ voltage output terminal

82:V-voltage output terminal

83: Output voltage feedback output terminal

84: output current feedback output terminal

85: Inductor current feedback output terminal

86: Duty cycle voltage input terminal

90: Feedback module

91: Inductor current feedback circuit

910: the first comparator

92: Output voltage feedback circuit

920: second comparator

93: Output current feedback circuit

930: the third comparator

94:Voltage follower circuit

940: Comparator

103: Stand-alone output voltage feedback output terminal

104: The first current feedback command input end of the stand-alone machine

105: The first voltage feedback command input terminal of the single machine

106: Stand-alone confluence output terminal

107: Second voltage feedback command input end of single machine

108: The second current feedback command input terminal of the single machine

109: Stand-alone voltage output group

Fig. 1 is a schematic diagram of the first embodiment (internal series and external parallel) of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention.

Fig. 2A is a schematic diagram of the second A embodiment (inner series and outer series) of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention.

Fig. 2B is a schematic diagram of the second B embodiment (internal series and external series) of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention.

Fig. 3 is a schematic diagram of the third embodiment (internal parallel and external parallel) of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention.

Fig. 4 is a schematic diagram of a fourth embodiment (inner parallel and outer series) of an automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of the power supply of the present invention.

5 is a schematic diagram of the feedback module of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention, which is the fifth embodiment of the present invention.

6A-6C are the circuit diagrams of the feedback module of the automatic voltage equalization and current equalization control circuit of the power supply multi-machine series-parallel output of the present invention, which are the sixth embodiment of the present invention.

7A-7B are schematic diagrams of the internal series-connected single power supply unit and the internal parallel-connected single power supply unit of the automatic voltage equalization and current equalization control circuit of the present invention, respectively.

Please refer to Fig. 1, Fig. 1 is the first embodiment of the present invention (internal series and external parallel), including: a first feedback module 10, a second feedback module 20, a third feedback module 30, and a fourth anti Feedback module 40, wherein the first feedback module 10 has an inductor current feedback input 11, an output current feedback input 12, an output voltage feedback input 13, a current feedback command input 14, a voltage feedback command Input 15, a duty cycle voltage output 16, and a bus output 17; similarly, the second feedback module 20 has an inductor current feedback input 21, an output current feedback input 22, an output voltage feedback Input terminal 23, a current feedback command input terminal 24, a voltage feedback command input terminal 25, a duty cycle voltage output terminal 26, and a bus output terminal 27; similarly, the third feedback module 30 has an inductor current feedback Input terminal 31, an output current feedback input terminal 32, an output voltage feedback input terminal 33, a current feedback command input terminal 34, a voltage feedback command input terminal 35, a duty cycle voltage output terminal 36, and a bus output terminal 37 ; Similarly, the fourth feedback module 40 has an inductor current feedback input 41, an output current feedback input 42, an output voltage feedback input 43, a current feedback command input 44, a voltage feedback command input 45 . A duty cycle voltage output terminal 46 and a bus output terminal 47 . Although the above-mentioned first embodiment of the present invention only includes the first to fourth feedback modules, the first embodiment can be simply extended to include the first to Nth feedback modules, where N is an even number greater than 4, and at the same time The first embodiment also covers aspects of the first to second feedback modules.

The first embodiment of the present invention also includes: a first DC power supply module 50, a second DC power supply module 60, a third DC power supply module 70 and a fourth DC power supply module 80, wherein the The first DC power supply module 50 has a V+ voltage output terminal 51 (or positive voltage output terminal 51), a V-voltage output terminal 52 (or negative voltage output terminal 52), an output voltage feedback output terminal 53, An output current feedback output terminal 54, an inductor current feedback output terminal 55, and a duty cycle voltage input terminal 56; similarly, the second DC power supply module 60 has a V+ voltage output terminal 61 (or positive voltage output terminal 61), a V-voltage output terminal 62 (or negative voltage output terminal 62), an output voltage feedback output terminal 63, an output current feedback output terminal 64, an inductor current feedback output terminal 65, and a duty cycle voltage input terminal 66; similarly, the third DC power supply module 70 has a V+ voltage output terminal 71 (or called positive voltage output terminal 71), a V-voltage output terminal 72 (or called negative voltage output terminal 72), an output Voltage feedback output terminal 73, an output voltage Current feedback output terminal 74, an inductor current feedback output terminal 75, and a duty cycle voltage input terminal 76; similarly, the fourth DC power supply module 80 has a V+ voltage output terminal 81 (or positive voltage output terminal 81) , a V-voltage output terminal 82 (or negative voltage output terminal 82), an output voltage feedback output terminal 83, an output current feedback output terminal 84, an inductor current feedback output terminal 85, and a duty cycle voltage input terminal 86 .

The V+ voltage output terminal 51 and the V-voltage output terminal 52 of the first DC power supply module 50 are used to output a set of output voltage VO1-1 of the first DC power supply module 50. The output voltage feedback output terminal 53, the output current feedback output terminal 54, and the inductor current feedback output terminal 55 of the current power supply module 50 are respectively connected to the output voltage feedback input terminal 13 of the first feedback module 10. , the output current feedback input terminal 12, and the inductor current feedback input terminal 11 are connected to respectively output a feedback output voltage VOFB1-1, a feedback output current IOFB1-1, and a feedback inductor current ILFB1-1 to the first feedback module 10, and the duty cycle voltage input end 56 of the first DC power supply module 50 is connected to the duty cycle voltage output end of the first feedback module 10 16 to receive a duty cycle voltage VDT1-1 output by the first feedback module 10, so as to control the set of output voltage VO1-1 of the first DC power supply module 50. The current feedback command input terminal 14 and the voltage feedback command input terminal 15 of the first feedback module 10 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the The feedback mode of the first feedback module 10, in this embodiment, the range of the voltage feedback command Vcommand and the current feedback command Icommand is an adjustable voltage from 0 to VDD, and the value of VDD depends on the design of the circuit. For example, VDD can be adjusted. 3.3V, 5V or 10V, etc., so that the set of output voltage VO1-1 in the first DC power supply module 50 is adjusted and controlled according to the voltage values of the voltage feedback command Vcommand and the current feedback command Icommand.

Similarly, the V+ voltage output terminal 61 and the V-voltage output terminal 62 of the second DC power supply module 60 are used to output a set of output voltages VO1-2 of the second DC power supply module 60, the second The output voltage feedback output terminal 63 of the DC power supply module 60, the output current feedback output terminal 64, and the The inductor current feedback output terminal 65 etc. are respectively connected with the output voltage feedback input terminal 23, the output current feedback input terminal 22, and the inductor current feedback input terminal 21 of the second feedback module 20 to respectively output the A feedback output voltage VOFB1-2, a feedback output current IOFB1-2, and a feedback inductor current ILFB1-2 output by the two DC power supply modules 60 are given to the second feedback module 20, and the second DC power supply module The duty cycle voltage input terminal 66 of 60 is connected to the duty cycle voltage output port 26 of the second feedback module 20 to receive a duty cycle voltage VDT1-2 output by the second feedback module 20, so as to control the The set of output voltages VO1 - 2 of the second DC power supply module 60 . The current feedback command input terminal 24 and the voltage feedback command input terminal 25 of the second feedback module 20 are respectively used to receive a control command Vstb and a voltage feedback command (that is, the VOFB1-1) to control the second The feedback mode of the feedback module 20, in this embodiment, the control instruction Vstb is a fixed voltage VDD, so that the output current feedback circuit 93 does not operate, so that the second DC power supply is adjusted and controlled only according to the voltage value of VOFB1-1 The set of output voltages VO1-2 in the module 60.

Similarly, the V+ voltage output terminal 71 and the V-voltage output terminal 72 of the third DC power supply module 70 are used to output a set of output voltage VO2-1 of the third DC power supply module 70, the third The output voltage feedback output terminal 73, the output current feedback output terminal 74, and the inductor current feedback output terminal 75 of the DC power supply module 70 are respectively connected to the output voltage feedback input terminal 33 of the third feedback module 30. , the output current feedback input terminal 32, and the inductor current feedback input terminal 31 are connected to respectively output a feedback output voltage VOFB2-1, a feedback output current IOFB2-1, and a feedback output current IOFB2-1 output by the third DC power supply module 70. A feedback inductor current ILFB2-1 is given to the third feedback module 30, and the duty cycle voltage input end 76 of the third DC power supply module 70 is connected to the duty cycle voltage output end 36 of the third feedback module 30 , to receive a duty cycle voltage VDT2-1 output by the third feedback module 30, so as to control the set of output voltage VO2-1 of the third DC power supply module 70. The current feedback command input terminal 34 and the voltage feedback command input terminal 35 of the third feedback module 30 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the The third feedback module 30 In the present invention, the range of the voltage feedback command Vcommand and the current feedback command Icommand is 0V~VDD, so the third direct current is adjusted and controlled according to the voltage values of the voltage feedback command Vcommand and the current feedback command Icommand The set of output voltages VO2-1 in the power module 70. Similarly, the V+ voltage output terminal 81 and the V-voltage output terminal 82 of the fourth DC power supply module 80 are used to output a set of output voltage VO2-2 of the fourth DC power supply module 80, the fourth The output voltage feedback output terminal 83, the output current feedback output terminal 84, and the inductor current feedback output terminal 85 of the DC power supply module 80 are respectively connected to the output voltage feedback input terminal 43 of the fourth feedback module 40. , the output current feedback input terminal 42, and the inductor current feedback input terminal 41 are connected to respectively output a feedback output voltage VOFB2-2, a feedback output current IOFB2-2, and a feedback output current IOFB2-2 output by the fourth DC power supply module 80. A feedback inductor current ILFB2-2 is given to the fourth feedback module 40, and the duty cycle voltage input end 86 of the fourth DC power supply module 80 is connected to the duty cycle voltage output end 46 of the fourth feedback module 40 , to receive a duty cycle voltage VDT2-2 output by the fourth feedback module 40, so as to control the set of output voltage VO2-2 of the fourth DC power supply module 80. The current feedback command input terminal 44 and the voltage feedback command input terminal 45 of the fourth feedback module 40 are respectively used to receive a control command Vstb and a voltage feedback command (namely the VOFB2-1) to control the first The feedback mode of the four-feedback module 40, in the present invention, the control instruction Vstb is a fixed voltage VDD, so that the output current feedback circuit 93 does not operate, so that the fourth DC power supply is adjusted and controlled only according to the voltage value of VOFB2-1 The set of output voltages VO2-2 in the module 80.

Furthermore, the bus output terminal 17 of the first feedback module 10, the bus output terminal 27 of the second feedback module 20, the bus output terminal 37 of the third feedback module 30, and the fourth feedback module The bus output terminals 47 of the module 40 respectively have a bus voltage VS1-1, a bus voltage VS1-2, a bus voltage VS2-1, and a bus voltage VS2-2. These bus output terminals 17, 27, 37 , , and 47 are directly connected to each other to combine these bus voltages VS1-1, VS1-2, VS2-1, VS2-2 and corresponding currents, so that at these bus output terminals 17, 27, 37 , and 47 are directly connected, the bus current The voltages VS1-1, VS1-2, VS2-1, and VS2-2 are equal potentials. For example, if the bus output terminals 17 and 37 are directly connected, the bus voltages VS1-1 and VS2-1 are equipotential. If terminals 17, 27, 37, and 47 are directly connected, the bus voltages VS1-1, VS1-2, VS2-1, and VS2-2 are at the same potential.

The aforementioned first to fourth DC power supply modules 50, 60, 70, and 80 all receive external power and output respective feedback output voltages (VOFB1-1, VOFB1-2, VOFB2-1, VOFB2-2), Feedback output current (IOFB1-1, IOFB1-2, IOFB2-1, IOFB2-2), and feedback inductor current (ILFB1-1, ILFB1-2, ILFB2-1, ILFB2-2) to the first to the fourth Feedback modules 10, 20, 30, and 40 are used to obtain and convert the external power supply into DC power supply according to their respective duty cycle voltages VDT1-1, VDT1-2, VDT2-1, and VDT2-2, and then connect them in series/parallel way output. The present invention does not disclose further detailed circuits of the first to the fourth DC power supply modules 50 , 60 , 70 , 80 .

The aforementioned first feedback module 10 and the first DC power supply module 50 together form a first power supply unit, and the second feedback module 20 and the second DC power supply module 60 together form a second power supply unit, The third feedback module 30 and the third DC power module 70 together form a third power supply unit, and the fourth feedback module 40 and the fourth DC power supply module 80 together form a fourth power supply unit. The first power supply unit and the second power supply unit together form a first power supply unit, and the third power supply unit and the fourth power supply unit together form a second power supply unit. The above-mentioned first power supply unit to the fourth power supply unit have the same circuit structure, but the external connections of their input and output terminals are different; the first power supply unit in the first power supply unit can be regarded as the main power supply unit. The power supply unit (master), the second power supply unit is regarded as a slave power supply unit (slave), that is, the feedback output voltage VOFB1-1 of the first power supply unit is input to the voltage feedback command input terminal of the second power supply unit 25, representing that the first power supply unit controls the second power supply unit so that the group output voltage VO1-2 of the second power supply unit is consistent with the group output voltage VO1-1 of the first power supply unit, and the group output The voltage VO1-2 and the set of output voltage VO1-1 of the first power supply unit are connected in series, that is, the single output of the first power supply is controlled by A series output voltage formed by the set of output voltage VO1-2 and the set of output voltage VO1-1; and the third power supply unit in the second power supply unit can be regarded as the main power supply unit (master), the second power supply unit The four power supply units are regarded as slaves, that is, the feedback output voltage VOFB2-1 of the third power supply unit is input to the voltage feedback command input terminal 45 of the fourth power supply unit, representing the third power supply unit controlling the fourth power supply unit so that the set of output voltage VO2-2 of the fourth power supply unit is consistent with the set of output voltage VO2-1 of the third power supply unit, and the set of output voltage VO2-1 is consistent with the set of output voltage VO2-1 of the fourth power supply unit The set of output voltage VO2-2 of the power supply unit is connected in series, that is, the second power supply unit outputs a series output voltage composed of the set of output voltage VO2-1 and the set of output voltage VO2-2; at the same time The bus output end 17 of the first power supply unit is also directly connected to the bus output end 37 of the third power supply unit for bus flow, so that the bus voltage VS1-1 of the bus output end 17 is equal to the bus voltage of the bus output end 37 voltage VS2-1, so that the set of output voltage VO1-1 of the first power supply unit is consistent with the set of output voltage VO2-1 of the third power supply unit, and the series output voltage of the first power supply unit output The series output voltage outputted by the second single power supply unit is in parallel connection; at this time, the first single power supply unit and the second single power supply unit can be regarded as equal. The above-mentioned first embodiment can therefore be referred to as "internal series and external parallel", that is, the first single power supply unit and the second single power supply unit are connected in parallel, and the first single power supply unit and the second single power supply unit are connected in parallel. The two internal power supply units of each single power supply unit are connected in series.

Please refer to Fig. 2A, Fig. 2A is the second A embodiment of the present invention (inner string and outer string), the second A embodiment is similar to the first embodiment, all have the first to the fourth power supply units , and it also has the first power supply stand-alone and the second power supply stand-alone, and the first power supply stand-alone is also composed of the first power supply unit and the second power supply unit, and the second power supply stand-alone is also composed of the Composed of the third power supply unit and the fourth power supply unit; the second A embodiment differs from the first embodiment in that the connection modes between the first to the fourth power supply units are different, and the second Embodiment A can be called "internal series and external series", that is, the first power supply unit and the second power supply unit The machines are connected in series, and the two internal power supply units of the first single power supply unit and the second single power supply unit are also connected in series. Although the above-mentioned second A embodiment of the present invention only includes the first to fourth feedback modules, the second A embodiment can be simply extended to include the first to Nth feedback modules, where N is an integer greater than 4 , and the second A embodiment also covers the aforementioned aspects where N is 1, 2, or 3.

In the second embodiment A, the first power supply unit in the first single power supply unit can be regarded as a master power supply unit (master), and the second power supply unit can be regarded as a slave power supply unit (slave), that is, the second power supply unit (slave) The output voltage feedback output terminal 53 of a power supply unit outputs a feedback output voltage VOFB1-1 to the voltage feedback command input terminal 25 of the second power supply unit, representing the first power supply unit to control the second power supply unit so that the The set of output voltage VO1-2 of the second power supply unit is consistent with the set of output voltage VO1-1 of the first power supply unit, and the set of output voltage VO1-2 of the first power supply unit is consistent with the set of output voltage VO1-1 of the first power supply unit It is in series mode, that is, the first power source alone outputs a series output voltage composed of the set of output voltages VO1-2 and the set of output voltages VO1-1. And the third power supply unit in the second power supply stand-alone can be regarded as outputting the feedback output voltage VOFB1-1 from the power supply unit (slave), that is, the output voltage feedback output terminal 53 of the first power supply unit to the The voltage feedback instruction input terminal 35 of the third power supply unit controls the third power supply unit on behalf of the first power supply unit, so that the set of output voltage VO2-1 of the third power supply unit is consistent with the set of output voltages of the first power supply unit The output voltage VO1-1 is consistent; and the fourth power supply unit in the second power supply unit can be regarded as outputting a feedback from the power supply unit (slave), that is, the output voltage feedback output terminal 73 of the third power supply unit. The output voltage VOFB2-1 to the voltage feedback command input terminal 45 of the fourth power supply unit represents that the third power supply unit controls the fourth power supply unit, so that the set of output voltage VO2-2 of the fourth power supply unit is consistent with the The set of output voltage VO2-1 of the third power supply unit is consistent, and the set of output voltage VO2-2 and the set of output voltage VO2-1 of the third power supply unit are connected in series, that is, the second power supply unit Outputting a series output voltage composed of the set of output voltage VO2-1 and the set of output voltage VO2-2; The output voltage in series and the output voltage in series output by the second power supply stand-alone are both in series.

In the second embodiment A, the current feedback command input terminal 14 and the voltage feedback command input terminal 15 of the first feedback module 10 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the first feedback module 10; the current feedback command input 24 and the voltage feedback command input 25 of the second feedback module 20 are respectively used to receive a control command Vstb and a voltage feedback command (ie VOFB1-1) to control the feedback mode of the second feedback module 20; the current feedback command input 34 and the voltage feedback command input 35 of the third feedback module 30 are respectively used After receiving a control instruction Vstb and a voltage feedback instruction (ie VOFB1-1) to control the feedback mode of the third feedback module 30; the current feedback instruction input terminal 44 of the fourth feedback module 40 and the voltage feedback instruction The input terminal 45 is respectively used to receive a control command Vstb and a voltage feedback command (ie VOFB2 - 1 ) to control the feedback mode of the fourth feedback module 40 . In the present invention, the control instruction Vstb is a fixed voltage of VDD.

Please refer to Fig. 2B, Fig. 2B is the second B embodiment of the present invention (inner string and outer string), the second B embodiment is similar to the second A embodiment, and the second B embodiment is similar to the second B embodiment The difference between the A embodiment is that the connection mode of the voltage feedback command input terminals in the first to the fourth power supply units is different, and the second B embodiment is also the state of "inner string and outer string". Although the above-mentioned second B embodiment of the present invention only includes the first to fourth feedback modules, the second B embodiment can be simply extended to include the first to Nth feedback modules, where N is an integer greater than 4 , and the second B embodiment also covers the above-mentioned aspects in which N is 1, 2, or 3.

In the second embodiment B, the current feedback command input terminal 14 and the voltage feedback command input terminal 15 of the first feedback module 10 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the first feedback module 10; the current feedback command input 24 and the voltage feedback command input of the second feedback module 20 25 is respectively used to receive a control instruction Vstb and a voltage feedback instruction (ie VOFB1-1) to control the feedback mode of the second feedback module 20; the current feedback instruction input terminal 34 of the third feedback module 30 and The voltage feedback command input terminal 35 is respectively used to receive a control command Vstb and the voltage feedback command (ie VOFB1-1) to control the feedback mode of the third feedback module 30; the current of the fourth feedback module 40 The feedback command input terminal 44 and the voltage feedback command input terminal 45 are respectively used to receive a control command Vstb and the voltage feedback command (ie VOFB 1-1) to control the feedback mode of the fourth feedback module 40; In Embodiment 2B and its promotion, the voltage feedback command input terminals of the second to Nth feedback modules are only connected to the voltage feedback command (ie VOFB1-1) of the first feedback module. In this embodiment, the control command Vstb is a fixed voltage of VDD.

三實施例也涵蓋上述N為1、2、3的態樣。 Please refer to Fig. 3, Fig. 3 is a third embodiment of the present invention (internal and external), the third embodiment is similar to the first embodiment, all have the first to the fourth power supply units, and It also has the first power supply stand-alone and the second power supply stand-alone, and the first power supply stand-alone is also composed of the first power supply unit and the second power supply unit, and the second power supply stand-alone is also composed of the third power supply stand-alone The third embodiment is composed of a power supply unit and the fourth power supply unit; the difference between the third embodiment and the first embodiment is that the connection methods between the first to the fourth power supply units are different, and the third embodiment can The state called "internal and external parallel", that is, the first single power supply unit and the second single power supply unit are connected in parallel, and the two internal power supply units of the first single power supply unit and the second single power supply unit are respectively The power supply units are also connected in parallel. Although the above-mentioned third embodiment of the present invention only includes the first to fourth feedback modules, the third embodiment can be simply extended to include the first to Nth feedback modules, where N is an integer greater than 4, and at the same time The first

The third embodiment also covers the aspects in which N is 1, 2, or 3 above.

In the third embodiment, the first power supply unit to the fourth power supply unit can be regarded as equal, that is, the bus output terminals 17, 27, 37, and 47 of the first power supply unit to the fourth power supply unit It is directly connected, so the bus voltage VS1-1, VS1-2, VS2-1, VS2-2 are equipotential, with The set of output voltages VO1-1, VO1-2, VO2-1, and VO2-2 from the first power supply unit to the fourth power supply unit are consistent, and the output voltages from the first power supply unit to the fourth power supply unit are Parallel state.

In the third embodiment, the current feedback command input terminal 14 and the voltage feedback command input terminal 15 of the first feedback module 10 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command ( Set as Vcommand) to control the feedback mode of the first feedback module 10; the current feedback command input 24 and the voltage feedback command input 25 of the second feedback module 20 are respectively used to receive a current feedback command ( set as Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the second feedback module 20; the current feedback command input 34 and the voltage feedback command input 35 of the third feedback module 30 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the third feedback module 30; the current feedback command input of the fourth feedback module 40 The terminal 44 and the voltage feedback command input terminal 45 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the fourth feedback module 40 .

Please refer to Fig. 4, Fig. 4 is a fourth embodiment of the present invention (inner parallel and outer string), the fourth embodiment is similar to the first embodiment, all have the first to the fourth power supply units, and It also has the first power supply stand-alone and the second power supply stand-alone, and the first power supply stand-alone is also composed of the first power supply unit and the second power supply unit, and the second power supply stand-alone is also composed of the third power supply stand-alone The fourth embodiment is composed of a power supply unit and the fourth power supply unit; the difference between the fourth embodiment and the first embodiment is that the connection methods between the first to the fourth power supply units are different, and the fourth embodiment can The state called "internal parallel external series", that is, the first single power supply unit and the second single power supply unit are connected in series, and the two internal power supply units of the first single power supply unit and the second single power supply unit respectively The power supply units are connected in parallel. Although the above-mentioned fourth embodiment of the present invention only includes the first to fourth feedback modules, the fourth embodiment can be simply extended to include the first to Nth feedback modules, where N is an even number greater than 4, and at the same time The fourth embodiment also covers aspects of the first to second feedback modules.

In the fourth embodiment, the first power supply unit and the second power supply unit in the first single power supply unit can be regarded as equal, and the bus output terminals 17, 27 is directly connected, so the bus voltages VS1-1 and VS1-2 are equipotential, so that the group of output voltages VO1-1 and VO1-2 of the first power supply unit and the second power supply unit are consistent and connected in parallel In other words, the first power source alone outputs a parallel output voltage composed of the set of output voltages VO1-2 and the set of output voltages VO1-1. And the third power supply unit and the fourth power supply unit in the second power supply stand-alone can be regarded as slaves, that is, the output voltage feedback output terminal 53 of the first power supply unit simultaneously outputs the feedback The output voltage VOFB1-1 to the voltage feedback command input terminals 35, 45 of the third power supply unit and the fourth power supply unit represents that the first power supply unit controls the third power supply unit and the fourth power supply unit so that the The set of output voltages VO2-1 and VO2-2 of the third power supply unit and the fourth power supply unit are consistent with the set of output voltage VO1-1 of the first power supply unit, while the third power supply unit and the fourth power supply unit are equal to each other, the bus output terminals 37, 47 of the third power supply unit and the fourth power supply unit are directly connected, so the bus voltage VS2-1, VS2-2 are equipotential, so that the third power supply unit and the fourth power supply unit The set of output voltages VO2-1 and VO2-2 of the fourth power supply unit are consistent and connected in parallel, that is, the output of the second power supply unit is composed of the set of output voltage VO2-2 and the set of output voltage VO2-1 A parallel output voltage is formed; here, the parallel output voltage output by the first single power supply and the parallel output voltage output by the second single power supply are in series.

In the fourth embodiment, the current feedback command input terminal 14 and the voltage feedback command input terminal 15 of the first feedback module 10 are respectively used to receive a current feedback command (set as Icommand) and a voltage feedback command ( Set as Vcommand) to control the feedback mode of the first feedback module 10; the current feedback command input 24 and the voltage feedback command input 25 of the second feedback module 20 are respectively used to receive a current feedback command ( Icommand) and a voltage feedback command (set as Vcommand) to control the feedback mode of the second feedback module 20; the current feedback command input 34 and the voltage feedback command input 35 of the third feedback module 30 are respectively Used to receive a control command Vstb and a voltage feedback command (ie VOFB1-1) to control the feedback mode of the third feedback module 30; the current feedback command input 44 and the voltage feedback command input 45 of the fourth feedback module 40 are respectively used to receive a control command Vstb and A voltage feedback command (ie VOFB1 - 1 ) is used to control the feedback mode of the fourth feedback module 40 .

Please refer to shown in Fig. 5, Fig. 5 is the schematic diagram of the feedback module of the present invention, also is the fifth embodiment of the present invention, a feedback module 90 in Fig. 5, it has an inductance current feedback circuit 91, an output voltage Feedback circuit 92, an output current feedback circuit 93, a voltage follower circuit 94, a connection point (or common connection point) P1 and a connection point (or common connection point) P4; wherein the voltage follower circuit 94 has an input Terminal P3 (i.e. the voltage feedback command input end) and an output end P4 (i.e. the output end is connected to the connection point P4), the output current feedback circuit 93 has an IOFB input end (i.e. the output current feedback input end) , an input terminal P2 (ie the current feedback command input terminal) and an output terminal P4 (ie the output terminal is connected to the connection point P4), the output voltage feedback circuit 92 has a VOFB input terminal (ie the output voltage feedback input terminal), an output terminal P1 (ie the bus output terminal and it is connected to the connection point P1) and a second input terminal P4 (ie the input terminal is connected to the connection point P4), so the output voltage feedback The second input terminal P4 of the circuit 92, the output terminal P4 of the voltage follower circuit 94 and the output terminal P4 of the output current feedback circuit 93 are all connected to the connection point P4; the inductor current feedback circuit 91 has an ILFB input terminal (ie the inductor current feedback input terminal), a VD output terminal (ie the duty cycle voltage output terminal) and a third input terminal P1 (ie the input terminal is connected to the connection point P1), so the inductor current feedback circuit Both the third input terminal P1 of 91 and the output terminal P1 of the output voltage feedback circuit 92 are connected to the connection point P1.

6A to 6C are the sixth embodiment of the present invention, and FIG. 6A is an embodiment of the feedback module 90, wherein the inductor current feedback circuit 91 has a first comparator 910, and the first comparator 910 has a positive terminal. The input is connected to the third input terminal P1 and connected to ground in parallel via a resistor RI and a capacitor CI. The first comparator 910 has a negative terminal input connected to one end of an input impedance ZAI and one end of a feedback impedance ZAO. The other end of the input impedance ZAI is connected to the ILFB input end, the other end of the feedback impedance ZAO is connected to the VD output end, and the first comparator 910 has an output end connected through a resistor RA To the VD output terminal, the VD output terminal is grounded through a resistor RD and a capacitor CD connected in parallel. In FIG. 6A, the output voltage feedback circuit 92 has a second comparator 920, and the second comparator 920 has a positive terminal input connected to the second input terminal P4 and grounded through a resistor RV and a capacitor CV connected in parallel. , the second comparator 920 has a negative input connected to one end of an input impedance ZBI and one end of a feedback impedance ZBO, the other end of the input impedance ZBI is connected to the VOFB input end, and the other end of the feedback impedance ZBO One terminal is connected to the output terminal P1, and the second comparator 920 has an output terminal connected to the output terminal P1 through a resistor RB. In FIG. 6A, the output current feedback circuit 93 has a third comparator 930, the third comparator 930 has a positive input connected to the input terminal P2, and the third comparator 930 has a negative input connected to One end of an input impedance ZCI and one end of a feedback impedance ZCO, the other end of the input impedance ZCI is connected to the IOFB input end, the other end of the feedback impedance ZCO is connected to the output end P4, the third comparator 930 An output terminal is connected to the output terminal P4 through a resistor RC. In FIG. 6A, the voltage follower circuit 94 has a comparator 940. The comparator 940 has a positive input connected to the input terminal P3. The comparator 940 has a negative input connected to the emitter of a transistor 941. Simultaneously connected to the output terminal P4, the comparator 940 has an output terminal connected to the base of the transistor 941, the collector of the transistor 941 is grounded, and the transistor 941 is a bipolar junction transistor (BJT ), but not limited thereto, Fig. 6B and Fig. 6C are another two implementations of the voltage follower circuit 94, as shown in Fig. 6B, in the voltage follower circuit 94, the field effect transistor 942 (FET) can replace the Transistor 941, wherein the negative input of the comparator 940 is connected to the drain of the field effect transistor 942 and simultaneously connected to the output of the output current feedback circuit 93, the output of the comparator 940 is connected to the field The gate of the field effect transistor 942, and the source of the field effect transistor 942 is grounded. As shown in FIG. 6C, in the voltage follower circuit 94, the transistor 941 can also be replaced by a diode 943 (Diode), wherein the negative terminal input of the comparator 940 is connected to the anode of the diode 943 At the same time, it is connected to the output terminal of the output current feedback circuit 93 , and the output terminal of the comparator 940 is connected to the cathode of the diode 943 .

In FIG. 6A, simply speaking, when the voltage VP4 of the connection point P4 (or the connection point voltage VP4) is higher than or equal to the voltage VP3 of the input terminal P3 of the voltage follower circuit 94, the voltage follower circuit 94 will action and the output current feedback circuit 93 does not operate, at this time the voltage VP4 of the connection point P4 will be pulled down by the voltage follower circuit 94 and clamped at the voltage level of the voltage VP3; otherwise, when the voltage VP3 is higher than the voltage VP4, The output current feedback circuit 93 works but the voltage follower circuit 94 does not work. At this time, the voltage VP4 of the connection point P4 is controlled and adjusted by the output voltage of the output current feedback circuit 93 .

The output voltage feedback circuit 92 receives the feedback output voltage VOFB from the VOFB input terminal, and outputs the voltage of the P1 output terminal after comparing the feedback output voltage VOFB with the input voltage of the second input terminal P4; When any two, three, or four of the power supply units are connected in parallel, each P1 output terminal of the power supply unit is directly connected to make the two, three, or four parallel power supply units The output is consistent.

The inductor current feedback circuit 91 receives the feedback inductor current ILFB from the ILFB input terminal, and the feedback inductor current ILFB together with the voltage of the P1 output terminal determines the duty cycle voltage of the VD output terminal.

The inductor current feedback circuit 91 can be regarded as inner loop compensation, the output voltage feedback circuit 92 can be regarded as middle loop compensation, and the output current feedback circuit 93 can be regarded as outer loop compensation. The internal structure of the first feedback module 10 , the second feedback module 20 , the third feedback module 30 , and the fourth feedback module 40 is the same as that of the feedback module 90 .

In another embodiment (not shown), the other end of the feedback impedance ZAO can also be selectively reconnected to the output VA of the first comparator 910 or maintain the aforementioned connection mode (that is, be connected to the VD output terminal), similarly, the other end of the feedback impedance ZBO can also be selectively connected to the output terminal VB of the second comparator 920 or maintain the aforementioned connection mode (ie connected to the output terminal P1) , the other end of the feedback impedance ZCO maintains the aforementioned connection mode (that is, it is connected to the connection point P4). And the resistance RA can also be selectively deleted (that is, the resistance value of the resistance RA can be 0) or remain the same, the resistance RD and the resistance Capacitor CD can also be selectively removed or remain in the original state. Similarly, the resistance RB can also be selectively deleted (that is, the resistance value of the resistance RB can be 0) or remain in the original state. The resistance RI and the capacitance CI They can also be selectively removed or remain in their original state. Similarly, the resistor RV and the capacitor CV can also be selectively removed or remain in their original state.

From the foregoing disclosure, it can be known that the series connection and parallel connection between each power supply unit/power supply stand-alone of the present invention is very simple and effective, and the modularization of the power supply unit/power supply stand-alone can be easily achieved, and its control signals, wiring, and control methods are all very simple. It is simple, and usually does not need to adjust the circuit or parameters in each power supply unit due to the series and parallel connection between each power supply unit/power supply unit, even if the series and parallel connection of each power supply unit/power supply under dynamic load conditions The output characteristics of the single unit can also be synchronized, which can greatly reduce the uneven current problem caused by the output voltage deviation between each power supply unit/power supply unit, and can also greatly reduce the output current deviation between each power unit/power supply unit The problem of uneven voltage caused by it can be maintained: total series-parallel power = power of a single power supply unit × number of series-parallel units.

As shown in FIG. 7A, FIG. 7A is a schematic diagram of an internal series-connected power supply unit. The power supply unit is composed of two power supply units connected in series, wherein the two power supply units are composed of the first feedback module 10 and the power supply unit respectively. A first power supply unit composed of the first DC power supply module 50, and a second power supply unit composed of the second feedback module 20 and the second DC power supply module 60, wherein the first feedback module The signal connection between 10 and the first DC power supply module 50 is the same as the signal connection between the first feedback module 10 and the first DC power supply module 50 in FIG. The signal connection between the second feedback module 20 and the second DC power module 60 is the same as the signal connection between the second feedback module 20 and the second DC power module 60 in FIG. 1 . The single power supply unit also has a single unit output voltage feedback output terminal 103, a single unit first current feedback command input terminal 104, a single unit first voltage feedback command input terminal 105, a single unit confluence output terminal 106, a single unit second voltage feedback A command input terminal 107, a single unit second current feedback command input terminal 108, and a single unit voltage output terminal group 109 are respectively connected to the output voltage feedback input terminal 13 of the first feedback module 10, the first feedback module The current feedback of 10 Command input terminal 14, the voltage feedback command input terminal 15 of the first feedback module 10, the bus output terminal 17 of the first feedback module 10, the current feedback command input terminal 24 of the second feedback module 20 , the voltage feedback command input terminal 25 of the second feedback module 20 is connected.

As shown in FIG. 7B , FIG. 7B is a schematic diagram of an internal parallel-connected single power supply unit, which is composed of the first power supply unit and the second power supply unit connected in parallel. Figure 7A is roughly the same as the power supply stand-alone in Figure 7B, the difference between the two is: in the power supply stand-alone of Figure 7A, the second voltage feedback command input end 107 of the stand-alone is connected to the output voltage feedback output end 103 of the stand-alone, and The second voltage feedback command input end 107 of the stand-alone power supply unit in FIG. 7B is not connected to other output/output ends of the stand-alone power supply unit. In addition, the bus output end 27 of the second power supply unit in FIG. 7B is connected to The bus output end 17 of the first power supply unit is connected, while the bus output end 27 of the second power supply unit in FIG. 7A is not connected to the bus output end 17 of the first power supply unit. The single-unit voltage output terminal group 109 of the internal series-connected power supply unit is composed of the group output voltage VO1-1 of the first DC power supply module 50 and the group output voltage VO1-1 of the second DC power supply module 60. 2. The two are connected in series, and the single voltage output terminal group 109 of the internal parallel power supply stand-alone in Fig. 7B is composed of the set of output voltage VO1-1 of the first DC power supply module 50 and the second The set of output voltages VO1-2 of the DC power supply module 60 are formed by connecting them in parallel.

In one embodiment, both the first current feedback command input terminal 104 and the first voltage feedback command input terminal 105 of the internal series-connected single power supply unit and the internal parallel-connected single power supply unit are controlled by an external The device is controlled, not by itself or by other internal series/parallel power supply stand-alone control.

Although the above-mentioned disclosure of the technical content of the present invention only takes the series-parallel connection of four power supply units as an embodiment, the present invention, in addition to the aforementioned first to fourth power supply units (equivalent to two single power supply units), in the present invention In one embodiment, more power supply units/power supplies can be connected in series, in parallel, or mixed in series and parallel to output voltages in series, parallel, or mixed in series and parallel. Therefore, the number of series, parallel or series-parallel hybrids of the power supply unit/power supply stand-alone of the present invention is not limited. Therefore, the technical means of the present invention disclosed above can achieve the purpose of the present invention.

1: Automatic voltage equalization and current equalization control circuit for multi-machine series and parallel output of power supply

10: The first feedback module

11: Inductor current feedback input terminal

12: Output current feedback input terminal

13: Output voltage feedback input terminal

14: Current feedback command input terminal

15: Voltage feedback command input terminal

16: Duty cycle voltage output terminal

17: Confluence output terminal

20: The second feedback module

21: Inductor current feedback input terminal

22: Output current feedback input terminal

23: Output voltage feedback input terminal

24: Current feedback command input terminal

25: Voltage feedback command input terminal

26: Duty cycle voltage output terminal

27: Confluence output terminal

30: The third feedback module

31: Inductor current feedback input terminal

32: Output current feedback input terminal

33: Output voltage feedback input terminal

34: Current feedback command input terminal

35: Voltage feedback command input terminal

36: Duty cycle voltage output terminal

37: Confluence output terminal

40: The fourth feedback module

41: Inductor current feedback input terminal

42: Output current feedback input terminal

43: Output voltage feedback input terminal

44: Current feedback command input terminal

45: Voltage feedback command input terminal

46: Duty cycle voltage output terminal

47: Confluence output terminal

50: The first DC power supply module

51: V+ voltage output terminal

52:V-voltage output terminal

53: Output voltage feedback output terminal

54: output current feedback output terminal

55: Inductor current feedback output terminal

56: Duty cycle voltage input terminal

60: Second DC power supply module

61: V+ voltage output terminal

62:V-voltage output terminal

63: output voltage feedback output terminal

64: output current feedback output terminal

65: Inductor current feedback output terminal

66: Duty cycle voltage input terminal

70: The third DC power module

71: V+ voltage output terminal

72: V-voltage output terminal

73: output voltage feedback output terminal

74: output current feedback output terminal

75: Inductor current feedback output terminal

76: Duty cycle voltage input terminal

80: The fourth DC power module

81: V+ voltage output terminal

82:V-voltage output terminal

83: Output voltage feedback output terminal

84: output current feedback output terminal

85: Inductor current feedback output terminal

86: Duty cycle voltage input terminal

Claims (27)

A feedback module, which is used for automatic voltage equalization and current equalization control circuit of multi-machine series-parallel output of power supply, the feedback module includes: an output current feedback circuit with a first comparator and an output current feedback input terminal to receive A feedback output current, a current feedback command input terminal to receive a current feedback command or a control command, and an output terminal; the first comparator has a positive terminal input connected to the current feedback command input terminal, the first comparator A negative input is connected to one end of an input impedance zci and one end of a feedback impedance zco, the other end of the input impedance zci is connected to the output current feedback input end, and the other end of the feedback impedance zco is connected to the output current The output terminal of the feedback circuit; a voltage follower circuit having a voltage feedback command input terminal to receive a voltage feedback command or an external feedback output voltage, and an output terminal; an output voltage feedback circuit having a second comparator, an output voltage feedback input end for receiving a feedback output voltage, a second input end, and a bus output end for outputting a bus voltage, the second input end of the output voltage feedback circuit, the output end of the output current feedback circuit , and the output terminal of the voltage follower circuit are electrically connected; the second comparator has a positive terminal input connected to the output terminal of the output current feedback circuit and is grounded through an input RC circuit, and the second comparator has a negative terminal The terminal input is connected to one end of an input impedance zbi and one end of a feedback impedance zbo, and the other end of the input impedance zbi is connected to the output voltage feedback input end; and an inductor current feedback circuit has a third comparator, a The inductor current feedback input end is used to receive a feedback inductor current, a third input end, and a duty cycle voltage output end to output a duty cycle voltage, the third input end of the inductor current feedback circuit and the output voltage feedback circuit The two bus output terminals are electrically connected; wherein the bus output terminal can be electrically connected to an external bus output terminal; the third comparator has a positive input connected to the bus output terminal and grounded through an input RC circuit, the The third comparator has a negative terminal input connected to one terminal of an input impedance zai and one terminal of a feedback impedance zao end, the other end of the input impedance zai is connected to the inductor current feedback input end, the other end of the feedback impedance zao can be selectively connected to the duty cycle voltage output end or an output end of the third comparator, the The output end of the third comparator is connected to the duty cycle voltage output end; wherein, the output end of the output current feedback circuit and the output end of the voltage follower circuit select one action to output a connection point voltage, the connection point voltage It is determined by the voltage of the input terminal of the current feedback command of the output current feedback circuit and the voltage of the input terminal of the voltage feedback command of the voltage follower circuit: the voltage of the connection point follows the output of the output terminal of the output current feedback circuit voltage or the output voltage at the output terminal of the voltage follower circuit. The feedback module as described in claim 1, wherein the voltage at the input terminal of the current feedback command of the output current feedback circuit can affect the output voltage at the output terminal of the output current feedback circuit, so that when the voltage at the connection point is greater than or equal to When the voltage of the voltage feedback command input terminal of the voltage follower circuit, the voltage of the connection point will be pulled down and clamped at the voltage of the voltage feedback command input terminal of the voltage follower circuit, and when the voltage of the connection point is lower than the voltage of the voltage follower circuit When the voltage feedback command input voltage, the voltage follower circuit does not act, at this time the connection point voltage follows the output voltage of the output current feedback circuit output. The feedback module according to claim 1, wherein the first comparator of the output current feedback circuit has an output terminal connected to the output terminal of the output current feedback circuit through an output resistor. The feedback module as described in claim 1, wherein the voltage follower circuit includes: a transistor, and a comparator, the comparator has a positive terminal input connected to the voltage feedback command input terminal, and the comparator has a negative terminal The input is connected to the emitter of the transistor and the output of the output current feedback circuit. The comparator has an output connected to the base of the transistor, and the collector of the transistor is grounded. The feedback module as described in claim 1, wherein the voltage follower circuit includes: a field effect transistor, and a comparator, the comparator has a positive input connected to the voltage feedback command input, and the comparator has a negative The terminal input is connected to the drain of the field effect transistor and simultaneously connected to the output of the output current feedback circuit, the comparator has an output connected to the gate of the field effect transistor, and the source of the field effect transistor is grounded . The feedback module as described in claim 1, wherein the voltage follower circuit includes: a diode, and a comparator, the comparator has a positive input connected to the voltage feedback command input, and the comparator has a negative The terminal input is connected to the anode of the diode and simultaneously connected to the output of the output current feedback circuit, and the comparator has an output connected to the cathode of the diode. The feedback module as described in claim 1, wherein, the other end of the feedback impedance zbo of the output voltage feedback circuit can be selectively connected to the output end of the output voltage feedback circuit or an output of the second comparator terminal, the output terminal of the second comparator is connected to the bus output terminal. The feedback module as claimed in claim 7, wherein the output terminal of the second comparator is further connected to the bus output terminal through an output resistor. The feedback module as claimed in claim 1, wherein the output terminal of the third comparator of the inductor current feedback circuit is connected to the duty cycle voltage output terminal. The feedback module as claimed in claim 9, wherein the output terminal of the third comparator is further connected to the duty cycle voltage output terminal through an output resistor. The feedback module according to claim 9, wherein the duty cycle voltage output terminal is also grounded through an output RC circuit. An automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of a power supply, the automatic voltage equalization and current equalization control circuit includes: a first to an Nth feedback module, and each feedback module is as described in request item 1 In the feedback module mentioned above, N is an integer greater than or equal to 4, and the first to the Nth feedback modules respectively have a first to a first Nth inductor current Feedback input terminal, one first to one Nth output voltage feedback input terminal, one first to one Nth output current feedback input terminal, one first to one Nth current feedback command input terminal, one first to one Nth A voltage feedback command input terminal, a first to a first Nth duty cycle voltage output terminal; wherein the first to the Nth inductance current feedback input terminal respectively receive a first to a Nth feedback inductance current; the first to the Nth The Nth output voltage feedback input terminal respectively receives a first to the Nth feedback output voltage; the first to the Nth output current feedback input terminal respectively receives a first to the Nth feedback output current; the first current feedback The command input terminal receives a current feedback command; the second to the Nth current feedback command input terminals all receive a control command; the first voltage feedback command input terminal receives a voltage feedback command; the second, third and the first 5. The seventh, the ninth, the eleventh, ... (increase two in sequence below) the input terminal of the voltage feedback command receives the first feedback output voltage; the fourth, the sixth, the eighth, The tenth... (increase by two in the following order) voltage feedback command input terminals respectively receive the third, the fifth, the seventh, the ninth, the eleventh, ... (increase by two in the following order) ) Feedback output voltage. The automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of power supplies as described in claim 12, wherein the range of the voltage feedback command and the current feedback command is between 0V and a fixed voltage (VDD) An adjustable voltage between, the control command is the fixed voltage. An automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of a power supply, the automatic voltage equalization and current equalization control circuit includes: a first to an Nth feedback module, and each feedback module is as described in request item 1 In the feedback module mentioned above, N is an integer greater than or equal to 4, and the first to the Nth feedback modules respectively have a first to a first Nth inductance current feedback input terminal, a first to a first Nth output voltage feedback input terminal, a first to a Nth output current Feedback input terminal, a first to a first Nth current feedback command input terminal, a first to a first Nth voltage feedback command input terminal, a first to a first Nth working cycle voltage output terminal; wherein the first to the first The N inductor current feedback input terminals respectively receive a first to the Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; the first to the Nth feedback output voltages are respectively received; N output current feedback input terminals respectively receive a first to a Nth feedback output current; the first current feedback command input terminal receives a current feedback command; the second to the Nth current feedback command input terminals respectively receive respective A control command; the first voltage feedback command input terminal receives a voltage feedback command; the second to Nth voltage feedback command input terminals receive the first feedback output voltage. An automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of a power supply, the automatic voltage equalization and current equalization control circuit includes: a first to an Nth feedback module, and each feedback module is as described in request item 1 In the feedback module mentioned above, N is an integer greater than or equal to 4, and the first to the Nth feedback modules respectively have a first to a first Nth inductance current feedback input terminal, a first to a first Nth output voltage feedback input terminal, a first to a first Nth output current feedback input terminal, a first to a first Nth current feedback command input terminal, a first to a first Nth voltage feedback command input terminal, a first to a first Nth duty cycle A voltage output terminal, a first to a Nth bus output terminal; wherein the first to the Nth inductance current feedback input terminal respectively receive a first to the Nth feedback inductance current; the first to the Nth output voltage The feedback input terminals respectively receive a first to an Nth feedback output voltage; The first to the Nth output current feedback input terminals respectively receive a first to the Nth feedback output current; the first to the Nth current feedback command input terminals all receive a current feedback command; the first to the Nth current feedback command input terminals receive a current feedback command; The N voltage feedback command input terminals all receive a voltage feedback command; the first to the Nth bus output terminals are connected together; the first to the Nth working cycle voltage output terminals respectively output a first to a Nth working cycle cycle voltage. The automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of power supplies as described in claim 15, wherein the range of the voltage feedback command and the current feedback command is between 0V and a fixed voltage (VDD) An adjustable voltage between. An automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of a power supply, the automatic voltage equalization and current equalization control circuit includes: a first to an Nth feedback module, and each feedback module is as described in request item 1 In the feedback module mentioned above, N is an even number greater than or equal to 4, and the first to the Nth feedback modules respectively have a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a first Nth output current feedback input terminal, a first to a first Nth current feedback command input terminal, a first to a first Nth voltage feedback command input terminal, a first to a first Nth duty cycle A voltage output terminal, a first to a Nth bus output terminal; wherein the first to the Nth inductance current feedback input terminal respectively receive a first to the Nth feedback inductance current; the first to the Nth output voltage The feedback input terminals respectively receive a first to a Nth feedback output voltage; the first to the Nth output current feedback input terminals respectively receive a first to a Nth feedback output current; The first, the third, the fifth, the seventh, ... (increase by two in the following order) the current feedback instruction input terminals all receive a current feedback instruction; the first, the third, the fifth, The seventh, ... (increase two in sequence below) all receive a voltage feedback command at the input end of the voltage feedback command; the second, the fourth, the sixth, the eighth, ... (increase in sequence in the following 2) The current feedback command input terminals all receive a control command; the second, the fourth, the sixth, the eighth, ... (increase by two in the following order) the voltage feedback command input terminals respectively receive the first, The third, the fifth, the seventh, ... (increase by two in the following order) feedback output voltage; the first, the third, the fifth, the seventh, ... (increase in order in the following 2) The bus output terminals are connected together; the first to the Nth working cycle voltage output terminals respectively output a first to a Nth working cycle voltage. The automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of power supplies as described in claim 17, wherein the range of the voltage feedback command and the current feedback command is between 0V and a fixed voltage (VDD) An adjustable voltage between, the control command is the fixed voltage. An automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of a power supply, the automatic voltage equalization and current equalization control circuit includes: a first to an Nth feedback module, and each feedback module is as described in request item 1 In the feedback module mentioned above, N is an even number greater than or equal to 4, and the first to the Nth feedback modules respectively have a first to a Nth inductor current feedback input terminal, a first to a Nth output voltage feedback input terminal, a first to a first Nth output current feedback input terminal, a first to a first Nth current feedback command input terminal, a first to a first Nth voltage feedback command input terminal, a first to a first Nth duty cycle Voltage output terminals, one first to one Nth bus output terminals; wherein The first to the Nth inductor current feedback input terminals respectively receive a first to the Nth feedback inductor current; the first to the Nth output voltage feedback input terminals respectively receive a first to the Nth feedback output voltage; The first to the Nth output current feedback input terminals respectively receive a first to the Nth feedback output current; the first and the second current feedback command input terminals both receive a current feedback command; the third to the Nth The current feedback command input terminals all receive a control command; the first and the second voltage feedback command input terminals both receive a voltage feedback command; the third to Nth voltage feedback command input terminals all receive the first feedback output voltage; The first and the second, the third and the fourth, the fifth and the sixth, the seventh and the eighth, ... (following in order) the bus output terminals are connected together; the first One to the Nth duty cycle voltage output terminals respectively output a first to a Nth duty cycle voltage. The automatic voltage equalization and current equalization control circuit for multi-machine series-parallel output of power supplies as described in claim 19, wherein the range of the voltage feedback command and the current feedback command is between 0V and a fixed voltage (VDD) An adjustable voltage between, the control command is the fixed voltage. A power supply unit, comprising: a DC power supply module, which converts an external power supply into a unit output voltage, and generates a feedback output voltage, a feedback output current, and a feedback inductor current; and as requested items 1 to 11 The feedback module described in any one of the above is connected to the DC power supply module; wherein the DC power supply module includes: a positive voltage output terminal and a negative voltage output terminal, which are used to output the output voltage of the unit; An output voltage feedback output terminal is connected to the output voltage feedback input terminal of the feedback module to output the feedback output voltage to the feedback module; an output current feedback output terminal is connected to the output current feedback input of the feedback module Terminal connected to output the feedback output current to the feedback module; an inductor current feedback output terminal connected to the inductor current feedback input terminal of the feedback module to output the feedback inductor current to the feedback module; a duty cycle voltage The input end is connected to the duty cycle voltage output end of the feedback module to input a duty cycle voltage from the feedback module; wherein the DC power supply module converts the external power supply into the unit output voltage based on the duty cycle voltage ; The power supply unit also includes: a unit voltage feedback command input terminal, connected to the voltage feedback command input terminal of the feedback module; a unit current feedback command input terminal, connected to the current feedback command input terminal of the feedback module; The unit output voltage feedback output terminal is connected to the output voltage feedback output terminal of the DC power supply module; a unit bus output terminal is connected to the bus output terminal of the feedback module; and a unit voltage output terminal group is connected by the DC power supply module. The positive voltage output terminal and the negative voltage output terminal of the power module are composed to output the output voltage of the unit. A stand-alone power supply unit, comprising: a first power supply unit, the first power supply unit is the power supply unit as described in claim 21, and is used to convert an external power supply into a first unit output voltage; a second power supply unit, the The second power supply unit is the power supply unit as described in claim 21, which is used to convert an external power supply into a second unit output voltage; A stand-alone voltage output terminal group is composed of the unit voltage output terminal group of the first power supply unit and the unit voltage output terminal group of the second power supply unit in series to output a single-unit output voltage; wherein, through a series setting mode, the The first and second power supply units have their respective unit voltage feedback command input terminals, unit current feedback command input terminals, and unit output voltage feedback output terminals to set their voltages or set their connection relationship with each other, which can make the first unit The output voltage and the output voltage of the second unit are connected in series to form the output voltage of the single unit, and then the output voltage of the single unit is output through the output terminal group of the single unit voltage; the single unit of power supply also includes: a first voltage feedback command input terminal of the single unit, connected to the unit voltage feedback command input end of the first power supply unit; a single unit second voltage feedback command input terminal connected to the unit voltage feedback command input end of the second power supply unit; a single unit first current feedback command input terminal, connected to the unit current feedback command input end of the first power supply unit; a single unit second current feedback command input terminal connected to the unit current feedback command input end of the second power supply unit; a single unit output voltage feedback output terminal connected to The unit output voltage feedback output terminal of the first power supply unit; and a single unit bus output terminal connected to the unit bus output terminal of the first power supply unit. The power supply stand-alone as described in claim 22, wherein, in the serial connection configuration, the first voltage feedback command input end of the stand-alone unit and the first current feedback command input end of the stand-alone unit are both controlled by an external device. A single power supply unit, comprising: A first power supply unit, the first power supply unit is the power supply unit as described in claim item 21, for converting an external power supply into a first unit output voltage; a second power supply unit, the second power supply unit is as requested The power supply unit described in Item 21, which is used to convert an external power supply into a second unit output voltage; a stand-alone voltage output terminal group, which is composed of the unit voltage output terminal group of the first power supply unit and the unit voltage of the second power supply unit The output terminal groups are connected in parallel to output a stand-alone output voltage; among them, the unit voltage feedback command input terminal, the unit current feedback command input terminal, and the unit output voltage feedback output of the first and second power supply units are respectively connected through a parallel connection setting mode. terminal, and unit confluence output terminal to set its voltage or set its connection relationship with each other, so that the output voltage of the first unit and the output voltage of the second unit can be connected in parallel to form the output voltage of the single unit, and then through the voltage of the single unit The output terminal group outputs the output voltage of the stand-alone unit; the stand-alone power supply also includes: a first stand-alone voltage feedback command input terminal connected to the unit voltage feedback command input terminal of the first power supply unit; a stand-alone second voltage feedback command input terminal , connected to the unit voltage feedback command input terminal of the second power supply unit; a single-unit first current feedback command input terminal, connected to the unit current feedback command input terminal of the first power supply unit; a single-unit second current feedback command input terminal , connected to the unit current feedback command input terminal of the second power supply unit; a single unit output voltage feedback output terminal connected to the unit output voltage feedback output terminal of the first power supply unit; and a single unit bus output terminal connected to the second power supply unit A unit bus output terminal of a power unit. The power supply stand-alone as described in claim 24, wherein, in the parallel configuration, the first voltage feedback command input end of the stand-alone unit and the first current feedback command input end of the stand-alone unit are both controlled by an external device. A power supply multi-unit output combination, comprising: at least two power supply units as described in claim 22 or 24, each of the at least two power supply units converts an external power supply into a respective single-unit output voltage ; a group of multi-machine voltage output terminals, which is composed of the single-machine voltage output terminal groups of each of the at least two power supply units, so as to output a multi-machine output voltage; Each of the single power supply units has its own first voltage feedback command input terminal, second voltage feedback command input terminal, first current feedback command input terminal, second current feedback command input terminal, and output voltage feedback output terminals, and single-machine confluence output terminals, etc. to set its voltage or set its connection relationship with each other, and to connect the single-machine voltage output terminal groups of each of the at least two power supply stand-alone machines in series, in parallel, or in series-parallel mixing, The single-unit output voltage of each of the at least two power supply units can be connected in series, in parallel, or in a combination of series and parallel to form the multi-unit output voltage, and then output the multi-unit output voltage through the multi-unit voltage output terminal group . A power supply multi-unit output combination, comprising: at least two power supply units as described in claim 23 or 25, each of the at least two power supply units converts an external power supply into a respective single-unit output voltage ; a group of multi-machine voltage output terminals, which is composed of the single-machine voltage output terminal groups of each of the at least two power supply units, so as to output a multi-machine output voltage; Each of the single power supply units has its own second voltage feedback command input terminal, second current feedback command input terminal, output voltage feedback output terminal of the single unit, and confluence output terminal of the single unit, etc. to set its voltage or set its mutual relationship connection relationship, and the The stand-alone voltage output terminal groups of each of the at least two power supply stand-alone machines are connected in series, in parallel, or mixed in series and parallel, so that the stand-alone output voltage of each of the at least two power supply stand-alone machines can be connected in series, in parallel, or in series The multi-machine output voltage is formed in parallel and mixed form, and then the multi-machine output voltage is output through the multi-machine voltage output terminal group.

Images