Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M3/00—Conversion of DC power input into DC power output
  • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
  • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M3/00—Conversion of DC power input into DC power output
  • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
  • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
  • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
  • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
  • H02M3/157—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M3/00—Conversion of DC power input into DC power output
  • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
  • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
  • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
  • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
  • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
  • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0003—Details of control, feedback or regulation circuits
  • H02M1/0009—Devices or circuits for detecting current in a converter
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
  • H05B47/10—Controlling the light source

Definitions

• Digital current sharing device analog current sharing device, current sharing method and system
• the present invention relates to the field of communications, and in particular to a digital current sharing device, an analog current sharing device, a current sharing method and a system. Background technique
• a distributed system is often used to connect several power modules in parallel.
• the currents shared by the modules will be different, which will cause different current stress and thermal stress on each module, thus reducing the reliability of the system.
• the power module In order to ensure current sharing, current stress and thermal stress distribution among multiple power supplies on the system, the power module must support parallel current sharing.
• Switching power supplies have evolved from analog control power supplies to digital control power supplies. Due to the high efficiency and high power density of digital power supplies, coupled with the concept of energy saving, efficient digital power supplies are becoming more and more popular among users.
• the digital power supply in the current power system has not completely replaced the analog power supply. That is to say, the digital-to-analog power supply on the current power supply system will be mixed and used in parallel, and in order to ensure the reliability of the system and the module, the digital-analog power supply must also be mixed. Supporting current sharing, then there will be a problem: how to achieve the current sharing when the digital-mode power supply is mixed.
• the automatic current sharing control mode is mostly based on analog control mode or digital to digital control mode, and there is a big difference between the analog power supply current sharing mode and the digital power supply current sharing mode.
• the analog current sharing mode is used uniformly, and the digital power supply of the mixed insertion cannot be averaged at this time; or the digital current sharing mode is uniformly adopted, and the mixed power supply cannot be uniformly currentized at this time. In this way, the current sharing in the case of digital-analog power supply mixing cannot be effectively realized.
• how to perform current sharing in the case of mixed digital-analog power supply, thereby ensuring that the power module is And the reliability of the entire power system is a problem.
• Embodiments of the present invention provide a digital current sharing device, an analog current sharing device, a current sharing method, and a system, to solve the analog and digital current sharing adopting a differentiated design, and cannot effectively perform current sharing when the analog power source and the digital power source are mixed and used. The problem.
• a digital current sharing device including: an output current sampling amplification module, a digital processing module, and a main power frequency conversion module, wherein an input end of the output current sampling amplification module is connected to an output of a power supply On the loop, the output end of the output current sampling and amplifying module is connected to the current sharing bus through a resistor R0; wherein the digital processing module is configured to sample the output voltage signal V2 of the amplifying module according to the output current and the The difference between the voltage signals Vbus of the stream bus adjusts the output voltage reference signal Vr, and controls the main power frequency conversion module to perform voltage adjustment according to the adjusted output voltage reference signal Vr.
• the device further includes: a current sharing control module, an input end of the current sharing control module is connected to an output voltage signal V2 of the output current sampling amplification module, and another input terminal is connected to a voltage signal of the current sharing bus
• the output of the current sharing control module is connected to the digital processing module; wherein the current sharing control module is configured to output an output voltage signal V2 capable of characterizing the output current sampling amplification module and the current sharing bus a voltage signal V3 of the difference between the voltage signals Vbus; the digital processing module is configured to adjust the output voltage reference signal Vr according to the voltage signal V3 output by the current sharing control module, and according to the adjusted output voltage reference The signal Vr controls the main power frequency conversion module to perform voltage adjustment.
• the apparatus further comprises: a digital processing peripheral module and an output voltage feedback module, wherein an output of the output voltage feedback module and an output of the current sharing control module are connected to the digital processing module through the digital processing peripheral module; , the output voltage feedback module is set to root Obtaining an output voltage feedback signal Vf according to the actual output voltage V0 of the power source; the digital processing peripheral module is configured to respectively output the voltage signal V3 output by the current sharing control module and the output voltage output by the output voltage feedback module The feedback signal Vf is converted into signals V3, and Vf suitable for analog-to-digital conversion and sampling by the digital processing module; the digital processing module is configured to pass the digital signal according to the voltage signal V3 output by the current sharing control module Processing the converted signal V3 of the peripheral module, adjusting the output voltage reference signal Vr, and adjusting the signal Vf converted by the digital processing peripheral module according to the output voltage feedback signal Vf output by the output voltage feedback module, and adjusting The output voltage reference signal Vr is used to control the main power frequency conversion module to perform voltage adjustment.
• the digital processing module comprises: a first A/D sampling conversion channel, configured to respectively convert the signals V3 and Vf converted by the digital processing peripheral module into digital signals; and the bias processing module is set to The digital signal of V3 is biased to obtain a current sharing loop error; the first PI adjusting module is configured to perform PI adjustment on the current sharing loop error to obtain a current sharing loop output; the first digital operation module is set to Performing a digital operation between the digital output voltage reference signal Vr and the current sharing loop output to obtain the adjusted output voltage reference signal Vr, wherein the opposite input terminal of the current sharing control module is connected
• the output voltage signal V2 of the output current sampling amplification module is connected to the voltage signal Vbus of the current sharing bus
• the digital operation is a weighted addition operation
• the current sharing control module is positive Connecting the output voltage signal V2 of the output current sampling and amplifying module to the input terminal, and connecting the voltage signal Vbus of the current sharing bus to the inverting input terminal, The digital operation is a weighted
• the digital operation is a weighted subtraction operation, Vr, as a digital signal of the subtracted number, Vf
• a second PI adjustment module configured to perform PI adjustment on the voltage loop error to obtain a voltage loop output
• the number generating module is configured to generate a modulated signal according to the voltage loop output.
• the current sharing control module comprises one of the following: a circuit built by an analog chip current sharing controller, and a circuit built by an operational amplifier.
• the output of the output current sampling amplification module and the current sharing bus are connected to the digital processing module.
• the apparatus further comprises: a digital processing peripheral module and an output voltage feedback module, an output of the output voltage feedback module, an output of the output current sampling amplification module, and an output of the current sharing bus through the digital processing periphery
• the module is connected to the digital processing module; wherein, the output voltage feedback module is configured to obtain an output voltage feedback signal Vf according to the actual output voltage V0 of the power source; the digital processing peripheral module is configured to respectively amplify the output current sample The output voltage signal V2 of the module, the voltage signal Vbus of the current sharing bus, and the output voltage feedback signal Vf output by the output voltage feedback module are converted into a signal V2 suitable for analog-to-digital conversion and sampling by the digital processing module, And the digital processing module is configured to: according to the output voltage signal V2 of the output current sampling amplification module, the signal V2 converted by the digital processing peripheral module, and the voltage signal Vbus of the current sharing bus Signal converted by the digital processing peripheral module Vbus' adjusts the output voltage reference signal Vr, and according to the output voltage
• the digital processing module comprises: a second A/D sampling conversion channel, configured to respectively convert the signals V2, Vbus, and Vf converted by the digital processing peripheral module into digital signals;
• the module is set to perform a digital operation between V2 and a digital signal of Vbus' to obtain a current sharing loop error, wherein the digital operation is a weighted subtraction operation, and the digital signal of V2 is used as a subtraction, Vbus'
• the digital signal is used as a subtraction, or the digital signal of Vbus' is used as the subtraction, and the digital signal of V2 is used as the subtraction
• the third PI adjustment module is set to The flow loop error is PI adjusted to obtain a current sharing loop output
• the fourth digital operation module is configured to perform the digital operation on the current sharing loop output and the digital output voltage reference signal Vr to obtain an adjusted output voltage reference signal Vr, wherein, in the case where the digital signal at V2 is used as a subtraction, the digital signal of Vbus, as a subtraction, the digital operation is
• the current sharing loop output is used as a subtraction.
• the digital operation is a weighted addition operation
• the fifth digital operation module is set to Performing a digital operation between the adjusted output voltage reference signal Vr and the digital signal of the converted signal Vf to obtain a voltage loop error, wherein the digital operation is a weighted subtraction operation, Vr, as The digital signal of the subtraction, Vf, is used as a subtraction
• the fourth PI adjustment module is configured to perform PI adjustment on the voltage loop error to obtain a voltage loop output
• a second modulation signal generating module configured to generate a modulation signal according to the voltage loop output.
• the apparatus further comprises: a driving module configured to generate a driving signal under the control of the digital processing module; the main power frequency conversion module is configured to perform voltage adjustment according to the driving signal.
• the output current sampling amplification module comprises: an output current sampling module and a current sampling amplification module, wherein the output current sampling module is connected to a positive end or a negative end of the output circuit, and an output signal of the output current sampling module As an input signal of the current sampling amplification module, an output end of the current sampling amplification module is connected to the current sharing bus through the resistor R0.
• an analog current sharing device including: an output current sampling amplification module, a current sharing control module, an operation module, a voltage error amplification module, and a main power conversion module, wherein the output An input end of the current sampling amplification module is connected to an output loop of the analog power supply, and an output end of the output current sampling amplification module is connected to a current sharing bus through a resistor R0; an input end of the current sharing control module is connected The output current The output voltage signal V2 of the amplification module is connected, and the other input terminal is connected to the voltage signal of the current sharing bus
• the current sharing control module is configured to output a voltage signal V3 capable of characterizing a difference between the output voltage signal V2 of the output current sampling amplification module and the voltage signal Vbus of the current sharing bus;
• the operation module is configured to Adjusting the output voltage reference signal Vr according to the voltage signal V3;
• the inverting input of the voltage error amplifying module is connected to the output voltage feedback signal Vf, and the same output is connected to the adjusted output voltage reference signal Vr output by the computing module,
• the voltage error amplifying module is configured to control the main power frequency conversion module to perform voltage adjustment according to the adjusted output voltage reference signal Vr and the output voltage feedback signal Vf.
• a current sharing system comprising one or more analog power sources and one or more digital power sources, the outputs of the respective power sources being connected in parallel, and the current sharing bus bars of the respective power sources are connected, the numbers
• the power supply includes the above digital current sharing device, and the analog power supply includes the above analog current sharing device.
• a current sharing method including: adjusting an output voltage reference signal Vr according to a difference between an output voltage signal V2 of an output current sampling amplification module and a voltage signal Vbus of a current sharing bus, The input end of the output current sampling and amplifying module is connected to an output loop of the power source, and the output end is connected to the current sharing bus through a resistor R0; and the power source is performed according to the adjusted output voltage reference signal Vr Voltage adjustment.
• the embodiment of the present invention solves the problem that the analog and digital current sharing in the related art adopts a differentiated design, and can effectively perform current sharing when the analog power source and the digital power source are mixed and used.
• the solution is easy to implement, and the power modules can be improved. Reliability of the entire power system.
• FIG. 1 is a block diagram showing the structure of a digital current sharing device according to an embodiment of the present invention
• FIG. 2 is a first preferred structural block diagram of a digital current sharing device according to an embodiment of the present invention
• FIG. 3 is a second preferred structural block diagram of a digital current sharing device according to an embodiment of the present invention
• FIG. 4 is a digital according to an embodiment of the present invention.
• a first preferred block diagram of the processing module 104; 5 is a block diagram showing a third preferred configuration of a digital current sharing device according to an embodiment of the present invention;
• FIG. 6 is a block diagram showing a fourth preferred configuration of a digital current sharing device according to an embodiment of the present invention;
• FIG. 8 is a fifth preferred block diagram of a digital current sharing device according to an embodiment of the present invention;
• FIG. 9 is a sixth preferred block diagram of a digital current sharing device according to an embodiment of the present invention;
• Figure 10 is an analog current sharing device in accordance with an embodiment of the present invention;
• FIG. 11 is a structural block diagram of a current sharing system according to an embodiment of the present invention.
• FIG. 13 is a schematic diagram of a digital-mode power supply hybrid insertion and paralleling machine according to an embodiment of the invention.
• FIG. 14 is a block diagram of a current sharing related circuit inside an analog power supply according to an embodiment of the present invention
• FIG. 15 is a block diagram of a current sharing related circuit with an analog current sharing controller in a digital power supply according to an embodiment of the present invention
• 16 is a block diagram of a current sharing related circuit without an analog current sharing controller inside a digital power supply according to an embodiment of the present invention
• Figure 17 is a diagram showing the control of current sharing in a digital processor according to Embodiment 2 of the present invention.
• Figure 18 is a diagram showing the control of current sharing in a digital processor according to Embodiment 3 of the present invention. detailed description
• the digital current sharing device includes: an output current sampling amplification module 102, a digital processing module 104, and a main power conversion module 106, and an output current.
• the input end of the sampling amplification module 102 is connected to the output loop of the power supply, and the output end of the output current sampling amplification module 102 is connected to the current sharing bus through a resistor R0.
• the digital processing module 104 is configured to sample the amplification module 102 according to the output current.
• the difference between the output voltage signal V2 and the voltage signal Vbus of the current sharing bus adjusts the output voltage reference signal Vr, and controls the main power frequency conversion module 106 to perform voltage adjustment according to the adjusted output voltage reference signal Vr.
• the current sharing of the digital power source can be realized. Moreover, since the current sharing device adopts the same processing basis as the analog current sharing, it is also applicable to the numbers in the scene of the mixed mode of the digital power source and the analog power source. Current sharing, the device is easy to implement, and can solve the current sharing problem when the digital-mode power supply is mixed and used, thereby improving the reliability of each power module and the entire power system.
• the digital current sharing device further includes: a current sharing control module 202, and an input terminal of the current sharing control module 202 is connected.
• the output voltage signal V2 of the current sampling amplifying module 102 is connected, and the other terminal is connected to the voltage signal Vbus of the current sharing bus.
• the output of the current sharing control module 202 is connected to the digital processing module 104.
• the current sharing control module 202 is configured to output The voltage signal V3 characterizing the difference between the output voltage signal V2 of the output current sampling amplification module 102 and the voltage signal Vbus of the current sharing bus; the digital processing module 104 is configured to adjust the output voltage reference according to the voltage signal V3 output by the current sharing control module 202 The signal Vr, and according to the adjusted output voltage reference signal Vr, controls the main power frequency conversion module 106 to perform voltage adjustment.
• the current sharing control module 202 can implement the generation of the current sharing signal V3 by using an analog circuit.
• the current sharing control module 202 can be constructed by an analog chip current sharing controller. Implemented or implemented by an op amp.
• the digital processing module 104 can adjust the output voltage reference signal according to the output signal of the current sharing control module 202, thereby adjusting the output of the digital power supply to achieve the purpose of current sharing.
• the digital processing peripheral module may also be added to pre-convert the signal input to the digital processing module 104.
• 3 is a second preferred structural block diagram of a digital current sharing device according to an embodiment of the present invention. As shown in FIG. 3, the digital current sharing device may further include: a digital processing peripheral module 302 and an output voltage feedback module 304, and output voltage feedback.
• the output of the module 304 and the output of the current sharing control module 202 are connected to the digital processing module 104 through the digital processing peripheral module 302; wherein, the output voltage feedback module 304 is configured to obtain an output voltage feedback signal Vf according to the actual output voltage V0 of the power supply;
• the module 302 is configured to respectively convert the voltage signal V3 output by the current sharing control module 202 and the output voltage feedback signal Vf output by the output voltage feedback module 304 into signals V3, and Vf, suitable for analog-to-digital conversion and sampling by the digital processing module 104;
• the digital processing module 104 is configured to adjust the output voltage reference signal Vr according to the signal V3 converted by the digital processing peripheral module 302 according to the voltage signal V3 output by the current sharing control module 202, and output the feedback signal Vf according to the output voltage feedback module 304.
• Digitally processed peripheral module 3 02 The converted signal Vf, and the adjusted output voltage reference signal Vr, controls the main power inverter module 106 to perform voltage adjustment.
• the digital processing module 104 includes: a first A/D sampling conversion channel 402, which is configured to respectively pass through a digital processing peripheral.
• the converted signal V3 and Vf of the module 302 are converted into a digital signal;
• the bias processing module 404 is configured to perform a bias processing on the digital signal of V3 to obtain a current sharing loop error;
• the first PI adjusting module 406 is set to be The current sharing loop error is subjected to PI adjustment to obtain a current sharing loop output;
• the first digital operation module 408 is configured to perform digital operation between the digital output voltage reference signal Vr and the current sharing loop output to obtain an adjusted output voltage reference signal.
• the digital operation module 410 is configured to perform a digital operation between the adjusted output voltage reference signal Vr and the digital signal of the converted signal Vf to obtain a voltage loop error, wherein the digital operation is a weighted subtraction operation, Vr, as The digital signal of the subtraction, Vf, is used as a subtraction;
• the second PI adjustment module 412 is configured to perform PI adjustment on the voltage loop error to obtain a voltage loop output;
• the first modulation signal generation module 414 is configured to generate according to the voltage loop output. Modulated signal.
• FIG. 5 is a block diagram of a third preferred configuration of a digital current sharing device in accordance with an embodiment of the present invention.
• the output of the output current sampling amplification module 102 and the current sharing bus are coupled to the digital processing module 104.
• the difference between the output voltage signal V2 of the output current sampling amplification module 102 and the voltage signal Vbus of the current sharing bus is determined by the digital processing module 104, thereby adjusting the output voltage reference signal Vr, thereby adjusting the output of the digital power supply. , to achieve the purpose of current sharing.
• the digital processing peripheral module may also be added to pre-convert the signal input to the digital processing module 104.
• 6 is a block diagram of a fourth preferred structure of a digital current sharing device according to an embodiment of the present invention. As shown in FIG. 6, the device further includes: a digital processing peripheral module 602 and an output voltage feedback module 604, and an output of the output voltage feedback module 604.
• the output of the output current sampling amplification module 102 and the output of the current sharing bus are connected to the digital processing module 104 through the digital processing peripheral module 602; wherein, the output voltage feedback module 604 is configured to obtain an output voltage feedback signal Vf according to the actual output voltage V0 of the power supply;
• the digital processing peripheral module 602 is configured to convert the output voltage signal V2 of the output current sampling amplification module 102, the voltage signal Vbus of the current sharing bus, and the output voltage feedback signal Vf output by the output voltage feedback module 604 into a suitable digital processing module 104 for performing the simulation.
• the digital processing module 104 is configured to pass the signal V2 converted by the digital processing peripheral module 602 according to the output voltage signal V2 of the output current sampling amplification module 102, and the voltage signal Vbus of the current sharing bus
• the digital processing peripheral module 602 converts the signal Vbus, adjusts the output voltage reference signal Vr, and outputs the converted signal Vf according to the output voltage feedback signal Vf outputted by the output voltage feedback module 604 through the digital processing peripheral module 602, and the adjusted output voltage.
• the reference signal Vr controls the main power conversion module 106 to perform voltage adjustment.
• FIG. 7 is a second preferred structural block diagram of the digital processing module 104 according to an embodiment of the present invention.
• the digital processing module 104 includes: a second A/D sampling conversion channel 702, which is configured to respectively pass through a digital processing peripheral.
• the converted signals V2, Vbus, and Vf of the module 602 are converted into digital signals;
• the third digital operation module 704 is configured to perform a digital operation between the digital signals of V2 and Vbus to obtain a current sharing loop error, wherein The digital operation is a weighted subtraction operation, the digital signal of V2 is used as the subtraction, the digital signal of Vbus' is used as the subtraction, or the digital signal of Vbus' is used as the subtraction, and the digital signal of V2 is used as the subtraction;
• the adjusting module 706 is configured to perform a PI adjustment on the current sharing loop error to obtain a current sharing loop output.
• the fourth digital operation module 708 is configured to perform a digital operation on the current sharing loop output and the digital output voltage reference signal Vr to be adjusted.
• the output voltage reference signal Vr where, in V2, the digital signal is used as a subtraction, and the Vbus' digital signal is used as a subtraction
• the digital operation is a weighted subtraction operation
• the digital output voltage reference signal Vr is subtracted
• the current sharing loop is output as a subtraction
• the digital signal at Vbus is used as a subtraction, V2, as a subtraction
• the digital operation is a weighted addition operation
• the fifth digital operation module 710 is configured to perform a digital operation between the adjusted output voltage reference signal Vr and the digital signal of the converted signal Vf to obtain a voltage loop error.
• the digital operation is a weighted subtraction operation, Vr, as a digital signal of the subtracted number, Vf, as a subtraction;
• the fourth PI adjustment module 712 is configured to perform voltage adjustment on the voltage loop error to obtain a voltage loop output;
• the second modulated signal generating module 714 is configured to generate a modulated signal based on the voltage loop output.
• the digital current sharing device further includes: a driving module 802 configured to generate a driving signal under the control of the digital processing module 104; the main power conversion module 106 is configured to perform voltage adjustment according to the driving signal.
• the output current sampling amplification module 102 includes: an output current sampling module 902 and a current sampling amplification module 904, and an output current sampling module.
• the 902 is connected to the positive or negative terminal of the output circuit, and the output signal of the output current sampling module 902 is used as an input signal of the current sampling amplification module 904.
• the output of the current sampling amplification module 904 is connected to the current sharing bus through the resistor R0.
• the driving module 802, the output current sampling module 902 and the current sampling amplification module 904 can all be implemented by a circuit; the digital processing module 104 can be implemented by a digital processor, and each module inside the digital processing module 104 can pass through the digital processing module 104. Run the corresponding code internally to implement.
• the embodiment of the invention further provides an analog current sharing device, which can be set in an analog power source to achieve current sharing.
• 10 is an analog current sharing device according to an embodiment of the present invention.
• the analog current sharing device includes: an output current sampling amplification module 1002, a current sharing control module 1004, an arithmetic module 1006, a voltage error amplification module 1008, and The main power conversion module 1010, wherein the input end of the output current sampling amplification module 1002 is connected to the output loop of the analog power supply, and the output end of the output current sampling amplification module 1002 is connected to the current sharing bus through a resistor R0;
• An input terminal of the 1004 is connected to the output voltage signal V2 of the output current sampling amplification module 1002, and the other input terminal is connected to the voltage signal Vbus of the current sharing bus.
• the current sharing control module 1004 is configured to output an output voltage signal capable of characterizing the output current sampling amplification module. V2 and the voltage signal V3 of the difference between the voltage signals Vbus of the current sharing bus; the operation module 1006 is arranged to adjust the output voltage reference signal Vr according to the voltage signal V3; the inverting input of the voltage error amplification module 1008 Connected to the output voltage feedback signal Vf, the same output is connected to the output voltage reference signal Vr outputted by the computing module 1006, and the voltage error amplifying module 1008 is set to be controlled according to the adjusted output voltage reference signal Vr and the output voltage feedback signal Vf.
• the main power conversion module 1010 performs voltage adjustment.
• the above analog current sharing device can realize the current sharing of the power source, and the control basis of the analog current sharing device in the current sharing is the same as the control basis of the above digital current sharing device, and therefore, the mixed power of the analog power source and the digital power source
• the analog power supply equipped with the analog current sharing device and the digital power supply configured with the digital current sharing device can work effectively at the same time, thereby enabling the current sharing control of the analog power source and the digital power source under the condition of analog digital mixing and insertion.
• the output current sampling amplification module 1002 may further include an output current sampling module and a current sampling amplification module.
• the output current sampling module is connected to the positive or negative terminal of the output circuit, and the output signal of the output current sampling module is used as a current.
• the input signal of the sampling amplification module, the output of the current sampling amplification module is connected to the current sharing bus through a resistor R0.
• the analog current sharing device can also include a drive module configured to generate a drive signal under control of the digital processing module 1004; the main power conversion module 1006 is configured to perform voltage adjustment based on the drive signal.
• output current sampling amplification module 1002 current sharing control module 1004, arithmetic module 1006, voltage error amplification module 1008, main power conversion module 1010, drive module, output current sampling module, and current sampling amplification module may all be It is realized by a circuit.
• FIG. 11 is a structural block diagram of a current sharing system according to an embodiment of the present invention. As shown in FIG. 11, the system includes one or more analog power sources and one or more numbers. The power supply, the outputs of the respective power supplies are connected in parallel, and the current sharing busbars of the respective power sources are connected.
• the digital power source includes the digital current sharing device described in the above embodiment, and the analog power source includes the analog current sharing device described in the above embodiments.
• FIG. 12 is a flowchart of a current sharing method according to an embodiment of the present invention. As shown in FIG. 12, the method includes: Step S1202: sampling the difference between the output voltage signal V2 of the amplification module and the voltage signal Vbus of the current sharing bus according to the output current. Adjusting the output voltage reference signal Vr, wherein the input end of the output current sampling amplification module is connected to the output loop of the power supply, and the output end is connected to the current sharing bus through a resistor R0;
• step S1204 the voltage adjustment of the power source is performed according to the adjusted output voltage reference signal Vr.
• the current sharing control of the analog power source and the digital power source can be realized.
• the method can be, but is not limited to, being applied in a scenario where the digital power source and the analog power source are mixed and inserted, and the current sharing control of the analog power source and the digital power source can be simultaneously realized.
• FIG. 13 is a schematic diagram of a digital-mode power supply hybrid insertion and paralleling machine according to an embodiment of the present invention.
• the power supply module in parallel use is a plurality of power supply modules.
• the power module 1301 is an analog power module
• the power module 1302 is a digital power module
• the six omitted points indicate other power modules that are not marked.
• the apparatus of this embodiment includes an internal circuit of the analog power supply and a current sharing related circuit and a digital power supply internal and current sharing related circuit.
• FIG. 14 is a block diagram of an internal current sharing related circuit of an analog power supply according to an embodiment of the present invention.
• the internal and current sharing related circuits of the analog power supply in the apparatus of the embodiment include: a sampling circuit 11, an output current amplifying circuit 12, a current sharing controller circuit 13, a voltage error amplifying circuit 15, an output voltage feedback circuit 14, a signal generating and driving unit circuit for converting a voltage error amplifying circuit output error voltage into a driving signal, Main power conversion circuit 17.
• the output current sampling circuit 11 outputs the output signal of the current sampling circuit 11 as an input signal of the current sampling and amplifying circuit 12, and the output signal of the current sampling and amplifying circuit 12 is connected to the current sharing bus through a resistor R0;
• An input terminal of the flow controller 13 is connected to the output signal of the current sampling and amplifying circuit 12, and the other input terminal is connected to the current bus voltage signal.
• the output signal and the output voltage reference signal are calculated by the analog circuit to obtain a current-sharing output voltage reference.
• the actual output voltage is outputted by the output voltage feedback circuit 14 to obtain an output voltage feedback signal
• the output voltage feedback signal is used as the inverting input of the voltage error amplifier 15, and the output voltage reference after the current sharing is used as the non-inverting input of the voltage error amplifier 15, the voltage error amplifier circuit
• the output signal is subjected to signal generation and drive unit circuit 16 to obtain a drive signal; the final drive signal is used to drive the associated power device in main power conversion circuit 17.
• FIG. 15 is a block diagram of a current sharing related circuit with an analog current sharing controller in a digital power supply according to an embodiment of the present invention.
• the related circuit includes an output current sampling circuit 21, an output current amplifying circuit 22, an output voltage feedback circuit 24, a current sharing controller circuit 28, a digital processor peripheral circuit 23, a digital processor 25, a drive circuit 26, and a main power conversion circuit 27.
• the output current sampling circuit 21 outputs the output signal of the current sampling circuit 21 as an input signal of the current sampling and amplifying circuit 22, and the output signal of the current sampling and amplifying circuit 22 is connected to the current sharing bus through a resistor R0;
• An input terminal of the flow controller 28 is connected to the output signal of the current sampling amplifying circuit 22, and the other input terminal is connected to the current sharing bus voltage signal;
• the actual output voltage is obtained by the output voltage feedback circuit 24 to obtain an output voltage feedback signal;
• Output and output voltage feedback signal pass number The word processor peripheral circuit 23 is sent to the digital processor 25, and the digital processor 25 samples and correlates the two signals to output a modulated signal, and the modulated signal generates a driving signal through the driving circuit 26, and finally drives the signal to drive the main power conversion circuit.
• Related power devices in 27 are sent to the digital processor 25, and the digital processor 25 samples and correlates the two signals to output a modulated signal, and the modulated signal generates a driving signal through the driving circuit 26, and finally drives the signal to drive the
• the current sharing related circuit includes an output current sampling circuit 31, an output current amplifying circuit 32, an output voltage feedback circuit 34, a digital processor peripheral circuit 33, a digital processor 35, a drive circuit 36, and a main power conversion circuit 37.
• the output current sampling circuit 31 outputs the output signal of the current sampling circuit 31 as an input signal of the current sampling and amplifying circuit 32, and the output signal of the current sampling and amplifying circuit 32 is connected to the current sharing bus through a resistor R0;
• the output voltage is obtained by the output voltage feedback circuit 34 to obtain an output voltage feedback signal;
• the output signal of the current sampling and amplifying circuit 32, the current sharing bus voltage signal and the output voltage feedback signal are sent to the digital processor 35 through the digital processor peripheral circuit 33, the digital processor 35.
• the three signals are sampled and correlated to output a modulated signal.
• the modulated signal is driven by the drive circuit 36 to generate a drive signal, and the final drive signal is used to drive the associated power device in the main power conversion circuit 37.
• the current-sense bus voltage Vbus reflects the output current of each power module and is processed by the output current sampling circuit and the current sampling amplifier circuit to obtain an average value of the voltage signal V2, that is, each module is reflected.
• the output of the current sharing controller 13 will adjust the non-inverting input of the voltage error amplifier 15.
• This embodiment can be generally applied to a power supply system in which multiple power supplies are used in parallel, in particular, a power supply system in which the digital-analog power supply is mixed and used in parallel, and the power supply module in this embodiment includes but is not limited to a switching power supply, and the power supply system in this embodiment This includes but is not limited to communication power systems.
• the output current sampling circuit position discussed in the apparatus of this embodiment may be at the positive end of the output loop or at the negative end of the output loop.
• Current sampling devices in the output current sampling circuit discussed in the apparatus of this embodiment include, but are not limited to, two terminal shunts, four terminal shunts, current transformers, current sensors, and the like.
• the current sharing controller circuit discussed in the apparatus of this embodiment includes, but is not limited to, a circuit constructed by a dedicated analog chip current sharing controller and a circuit constructed by an operational amplifier.
• This embodiment is easy to implement, and can solve the current sharing problem when the digital-mode power supply is mixed and used, and improve the reliability of each power module and the entire power system.
• the analog power supply 1301 and the digital power supply 1302 are connected in parallel, wherein the digital power supply 1302 has an analog current sharing controller inside, and the analog power supply 1301 internal current sharing related circuit block diagram is shown in FIG. 14, and the digital power supply 1302 is internally.
• the block diagram of the current sharing related circuit is shown in Figure 15.
• Vbus is obtained from a current sharing bus connected to the analog power supply 1301 and the digital power supply 1302 output current amplified by a resistor R0, which reflects the average value of the output current of the analog power supply 1301 and the digital power supply 1302.
• the output current 10 passes through the output current sampling 11 circuit and the current sampling amplification circuit 12 to obtain a voltage signal V2, which reflects the magnitude of the local output current, which serves as an input of the current sharing controller 13.
• Vbus reflects the average of the two power supply output currents, which serves as the other input of the current sharing controller 13.
• V3 is the output of the current sharing controller 13, which affects the output voltage reference Vr, thereby affecting its operation with Vr through the analog circuit to obtain a new output voltage.
• Vr, Vr as the non-inverting input of the voltage error amplifier 15, and the inverting input of the voltage error amplifier 15 output voltage feedback Vf in turn affects the output Ve of the voltage error amplifier 15, Ve through the signal generating and driving unit 16
• the circuit changes the drive signal, and finally adjusts the output voltage to achieve the output current sharing by adjusting the operating state of the main power conversion circuit 17. For example, when the V2 of the module is less than Vbus, that is, the output current of the module is less than the average current, the output V3 of the current sharing controller 13 increases, and the output voltage reference becomes larger, the output voltage of the module increases, and the output current of the module Raise, thus achieving the purpose of current sharing, and vice versa.
• V2 reflects the output current of the machine
• Vbus reflects the average of the two power supply output currents as the other input of the current sharing controller 28.
• V3 is the output of the current sharing controller 28
• Vf is the output voltage feedback signal obtained by the output voltage feedback 24 circuit of the actual output voltage V0.
• V3 and Vf are obtained by the corresponding digital processor peripheral circuit 23 to be suitable for the digital processor 25 for A/ D converts the sampled analog signals V3, and Vf,.
• Figure 17 is a diagram showing the control of current sharing in a digital processor according to Embodiment 2 of the present invention. Inside the digital processor 25, control as shown in Figure 17 is performed.
• the analog signals V3' and Vf are converted to digital signals by an A/D sampling conversion channel of the digital processor 25.
• the digital signal of V3' is subjected to the bias processing to obtain the current sharing loop error.
• the current sharing loop error is adjusted by PI to obtain the current sharing loop output.
• the current sharing loop output and the digital output voltage reference are digitally operated to obtain a new output voltage reference.
• the modulated signal outputted by the digital processor 25 is driven by the drive circuit 26 to generate a drive signal.
• the drive signal adjusts the output voltage to the output current equalization by adjusting the operating state of the main power conversion circuit 27.
• the output V3 of the current sharing controller 13 is increased, and the digital processor 25 is When the output of the current loop is positive and the output voltage is increased, the output voltage of the module is increased, and the output current of the module is increased, thereby achieving the purpose of current sharing, and vice versa.
• the analog power supply 1301 and the digital power supply 1302 are connected in parallel, wherein the digital power supply 1302 does not have an analog current sharing controller inside, and the analog power supply 1301 internal current sharing related circuit block diagram is as shown in FIG. 14, the digital power supply 1302.
• the internal current sharing related circuit block diagram is shown in Figure 16.
• Vbus is obtained from a current sharing bus connected to the analog power supply 1301 and the digital power supply 1302 output current amplified by a resistor R0, which reflects the average value of the output current of the analog power supply 1301 and the digital power supply 1302.
• the adjustment mechanism of the internal current sharing in the analog power supply is the same as that of Embodiment 2, and will not be described again.
• Output current 10 After output current sampling 31 Circuit and current sampling amplification 32 circuit obtains voltage signal V2, V2 reflects the output current of the machine, Vbus reflects the average value of the output current of the two power supplies.
• Output Voltage The output voltage feedback Vf is obtained from the output voltage feedback 34 circuit.
• V2, Vbus, and Vf obtain analog signals V2, Vbus, and Vf suitable for digital processor 35 for A/D conversion sampling through corresponding digital processor peripheral circuits 33.
• Figure 18 is a diagram showing the control of current sharing in the digital processor according to Embodiment 3 of the present invention. Inside the digital processor 35, control as shown in Fig. 18 is performed.
• the analog signals V2', Vbus', and Vf are converted to digital signals by an A/D sampling conversion channel of the digital processor 35.
• the digital signals of V2' and Vbus are processed by digital operation to obtain the current sharing loop error.
• the current sharing loop error is adjusted by PI to obtain the current sharing loop output.
• the current sharing loop output and the digital output voltage reference are digitally calculated to obtain a new output.
• the modulated signal outputted by the digital processor 35 generates a drive signal through the drive 36 circuit, and the drive signal is adjusted by adjusting the operating state of the main power conversion circuit 37. Adjust the output voltage to achieve the purpose of output current sharing.
• the current sharing loop error in the digital processor 35 is a positive value, and after the PI adjusts the current sharing loop output to a positive value to increase the output voltage reference, The output voltage of this module increases, which in turn increases the output current of the module, thereby achieving the purpose of current sharing, and vice versa.
• Embodiment 2 and Embodiment 3 are described by taking the current sharing of two power supplies as an example. If the N modules are paralleled, the corresponding design is similar.
• the solution provided by the above embodiment solves the problem that the analog and digital current sharing in the related art adopts a differentiated design, and the current sharing cannot be effectively performed when the analog power source and the digital power source are mixed and used.
• the solution is easy to implement and can improve the reliability of each power module and the entire power system.
• modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
• the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
• the invention is not limited to any specific combination of hardware and software.

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• 2012
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