CN1710790B - Control system capable of regualting pulse width of multiple switch changer - Google Patents
Control system capable of regualting pulse width of multiple switch changer Download PDFInfo
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- CN1710790B CN1710790B CN2005100506404A CN200510050640A CN1710790B CN 1710790 B CN1710790 B CN 1710790B CN 2005100506404 A CN2005100506404 A CN 2005100506404A CN 200510050640 A CN200510050640 A CN 200510050640A CN 1710790 B CN1710790 B CN 1710790B
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Abstract
Multiple controllers are connected to form a control system. Drive control pulse ends at switch converters of all controllers are connected to each other. PWM feedback signal is input to the said drive control pulse ends, which are connected to PWM controllers. Being passed through signal process, specific variable such as current or voltage at output end of main circuit of switching power supplyis connected to signal collection end of object to be controlled directly. Through a resistance, the signal at the signal collection end of object to be controlled is connected to signal bus end. Signal bus ends of all controllers are connected to each other. The input end of the drive transformer control signal in the switch converter is connected to the controlled end in the main circuit of theswitching power supply.
Description
Technical field
The present invention relates to a kind of control method, especially at a kind of control method that can regulate a plurality of switch converters pulse durations simultaneously.
Background technology
Current the most frequently used pulse-width regulated technology has PWM, frequency modulation, accent service time, transfers the turn-off time etc., but mainly contains following two kinds on the mode.Regulate by special-purpose PWM controller (as UC3842 etc.) for first kind, this also is to use maximum technology.Another kind is to use digital circuit, promptly uses single-chip microcomputer or DSP that signal is handled, but this method relative complex.
Current-sharing in many switch converters in the Pressure and Control, need realize control to its curtage by the switching signal width that the collection of controlled quentity controlled variable and feedback is removed control each switch converters, thereby realize these functions.
And in same switch converters, also can realize control by the control switch deration of signal to neutral point level in abvolt balance second or the multi-level converter.
Magnetic switch generally is used in the main loop of power circuit of multi-output switch power source, can regulate the output of Switching Power Supply by the degree of depth that the control magnetic switch resets.Do not having when saturated, magnetic switch is equivalent to an inductance that the sense value is very big, and electric current is almost constant in the circuit, thereby at this moment the voltage signal in the circuit can not be transmitted, and circuit is equivalent to disconnect; When magnetic switch is subjected to voltage and multiply by the time (weber) when reaching certain value and making it saturated, magnetic switch is saturated, then is equivalent to short circuit, and is unsaturated to the saturated impulse waveform of being cut by the magnetic switch circuit that is during this period of time from magnetic switch.
Summary of the invention
The present invention realizes that by linear amount control switch amount regulates, promptly paired pulses implement reprocessing finally realize simultaneously to Be Controlled object curtage in two or more switches in two or more switch converters or the switch converters etc. specifically variable regulate.
Control method of the present invention, its controller can a plurality ofly link to each other, form a control system: input power amplifying circuit 110 inputs in its middle controller 210 link to each other with switch converters drive controlling pulse ends 1, and power output amplifying circuit 120 outputs link to each other with driving transformer signal input end 2 in the switch converters; Magnetic switch circuit 130 inputs link to each other with input power amplifying circuit 110 outputs, and output links to each other with power output amplifying circuit 120 inputs; Tuning controller 150 inputs link to each other with controlled device acquired signal end 3, signal bus 4 respectively, and output links to each other with magnetic reset circuit 140 inputs; Magnetic reset circuit 140 outputs link to each other with magnetic switch circuit 130 controlled terminals; The coordinated controller of controlled device acquired signal from switch converters 150 is by magnetic reset circuit 140 control magnetic switch circuit 130, makes magnetic switch circuit 130 signal of switch converters drive controlling pulse ends 1 is adjusted into the signal of the driving transformer signal input end 2 in the switch converters by the copped wave characteristic of magnetic switch; Described controller 210 can a plurality ofly link to each other, and forms a control system, and the switch converters drive controlling pulse ends 1 of all controls 210 links together; The switch converters drive controlling pulse ends 1 input PWM feedback signal that links to each other with PWM controller in the switch converters; The concrete variable of the curtage of Switching Power Supply main circuit output directly inserts controlled device acquired signal end 3 by the signal after handling; The signal of controlled device acquired signal end 3 passes through to insert signal bus 4 behind the resistance R X; The signal bus 4 of all controllers 210 links together; Driving transformer signal input end 2 in the switch converters connects the controlled terminal of Switching Power Supply main circuit.
The switch converters drive controlling pulse ends of all controllers links together; The switch converters drive controlling pulse ends input PWM feedback signal that links to each other with PWM controller in the switch converters; Concrete variable such as the curtage of Switching Power Supply main circuit output directly inserts controlled device acquired signal end by the signal after handling; The signal of controlled device acquired signal end inserts current-sharing (or all pressing) signal bus after by a resistance and is called for short current-sharing (or all pressing) bus, or the signal bus; The signal bus of all controllers links together; Driving transformer signal input end in the switch converters connects Switching Power Supply main circuit controlled terminal.Above-mentioned controller comprises that the input power input amplifier links to each other with switch converters drive controlling pulse ends; The power output amplification circuit output end links to each other with driving transformer signal input end in the switch converters; The magnetic switch circuit input end links to each other with the input power amplification circuit output end, and output links to each other with the power output input amplifier; The tuning controller input links to each other with controlled device acquired signal end, signal bus respectively, and output links to each other with the magnetic reset circuit input end; The magnetic reset circuit output end links to each other with magnetic switch circuit controlled terminal; The coordinated controller of controlled device acquired signal from switch converters is by magnetic reset circuit control magnetic switch circuit, makes the magnetic switch circuit switch converters drive controlling pulse ends is adjusted into the signal of the driving transformer signal input end in the switch converters by the copped wave characteristic of magnetic switch.
Above-mentioned Switching Power Supply main circuit can be a plurality of independent switch converters, also can be a plurality of switch modules in the switch converters.
Can and be unified into equalizing control circuit between a plurality of controller modules, with the current signal of each controller module collection by compiling the formation current equalizing bus bar, the signal of module and the signal of current equalizing bus bar are sent into tuning controller jointly and are extracted control signal, respectively each module drive wave mode are carried out copped wave by the control of magnetic switch and regulate.A plurality of controller modules also can be connected into voltage-equalizing control circuit, the voltage signal of each module collection is all pressed the signal bus by compiling formation, the signal of module and the signal of equalizing busbar are sent into tuning controller jointly and are extracted control signal, respectively each module drive wave mode are carried out copped wave by the control of magnetic switch and regulate.
The signal of above-mentioned switch converters drive controlling pulse ends input can be a pwm signal, also can be the switching value signal, pulse signal etc. of other frequency modulation.
In positive and negative weber (or ampere-second) that controller is used for single AC converter during balance, the controlling object of controller 210 is selected the time integral amount of the output signal of converter, and sampled signal need not to compile can directly send tuning controller.
When controller was used for the Balance Control of neutral point voltage of many level switches of individual module converter, the controlling object of controller 210 was each neutral point voltage in the switch converters.
Above-mentioned tuning controller adopts pi controller.The signal of above-mentioned Switching Power Supply main circuit output is gathered by the current sample amplifying circuit, also can be with collections such as Hall element or current transformer sample circuit or resistance sampling circuits.Above-mentioned acquired signal binding mode adopts the mean value mode, also can be master-slave mode or maximum mode.
Paired pulses of the present invention implement reprocessing finally realize simultaneously to Be Controlled object curtage in two or more switches in two or more switch converters or the switch converters etc. specifically variable regulate; Thereby utilizing magnetic switch to regulate to reach to the width that square wave carries out the Characteristics Control pulse of copped wave controls whole system certain electric tolerance.By sampling feedback, original pulsewidth is carried out corresponding adjusting simultaneously, replace the function of some special chips or single-chip microcomputer, provide cost savings, very high industrial value is arranged by simple magnetic amplifying circuit to manipulated signal in the system.
Description of drawings
A kind of syndeton block diagram between the controller of Fig. 1 circuit of the present invention;
Fig. 2 the present invention is used for the basic structure block diagram of the system of current-sharing;
Fig. 3 the present invention is used for the basic structure block diagram of the system that Switching Power Supply all presses;
Fig. 4 the present invention is used for the basic structure block diagram that many four level mid points are all pressed;
Fig. 5 the present invention is used for the basic structure block diagram of weber balance.
Among each figure: 1 is switch converters drive controlling pulse ends: 2 are the driving transformer signal input end in the switch converters; 3 is controlled device acquired signal end; 4 is that current-sharing (or all pressing) signal bus 110 is that input power amplifying circuit 120 is the power output amplifying circuit; 130 is the magnetic switch circuit; 140 is the magnetic reset circuit; 150 is that tuning controller 210 is controller; RX is a resistance.
Embodiment
Specific embodiment 1: controller 210 comprises that input power amplifying circuit 110 inputs link to each other with switch converters drive controlling pulse ends 1; Power output amplifying circuit 120 outputs link to each other with driving transformer signal input end 2 in the switch converters; Magnetic switch circuit 130 inputs link to each other with input power amplifying circuit 110 outputs, and output links to each other with power output amplifying circuit 120 inputs; Coordinate control 150 inputs and link to each other with controlled device acquired signal end 3, current-sharing (or all pressing) signal bus 4 respectively, output links to each other with magnetic reset circuit 140 inputs; Magnetic reset circuit 140 outputs link to each other with magnetic switch circuit 130 controlled terminals: the coordinated controller of the controlled device acquired signal from switch converters 150 is by magnetic reset circuit 140 control magnetic switch circuit 130, makes magnetic switch circuit 130 switch converters drive controlling pulse ends 1 is adjusted into the signal of the driving transformer signal input end 2 in the switch converters by the copped wave characteristic of magnetic switch.More than 210 of above-mentioned controllers are linked to each other, and form a control system: the switch converters drive controlling pulse ends 1 of all controllers 210 links together; The switch converters drive controlling pulse ends 1 input PWM feedback signal that links to each other with PWM controller in the switch converters; Concrete variable such as the curtage of Switching Power Supply main circuit output directly inserts controlled device acquired signal end 3 by the signal after handling; The signal of controlled device acquired signal end 3 passes through to insert signal bus 4 behind the resistance R X; The current-sharing of all controllers 210 (or all pressing) signal bus 4 links together; Driving transformer signal input end 2 in the switch converters connects the controlled terminal of Switching Power Supply main circuit.Wherein: the Switching Power Supply main circuit is a plurality of independent switch converters; The signal of switch converters drive controlling pulse ends 1 input is a pwm signal; Tuning controller 150 adopts pi controller; The signal of Switching Power Supply main circuit output is gathered by the current sample amplifying circuit; The acquired signal binding mode adopts the mean value mode.
Specific embodiment 2: the control system described in the specific embodiment 1, it is used for the positive and negative weber (or ampere-second) of single AC converter during balance at controller 210, described controlling object is selected the time integral amount of the output signal of converter, and sampled signal need not to compile can directly send tuning controller 150; The Switching Power Supply main circuit is a plurality of switch modules in the switch converters; The signal of switch converters drive controlling pulse ends 1 input is the switching value signal of frequency modulation or pulse signal etc.; The signal of Switching Power Supply main circuit output is gathered with Hall element; The acquired signal binding mode adopts master-slave mode.
Specific embodiment 3: the control system described in the specific embodiment 1, between its a plurality of controller 210 modules by and be unified into equalizing control circuit, the current signal of each controller 210 module collection is formed current equalizing bus bar 4 by compiling, the signal of the signal of module and current equalizing bus bar 4 is sent into tuning controller 150 jointly and is extracted control signal, respectively each module drive wave mode is carried out copped wave by the control of magnetic switch and regulates; The signal of Switching Power Supply main circuit output, the Current Transformer sample circuit is gathered; The acquired signal binding mode adopts the maximum mode.
Specific embodiment 4: the control system described in the specific embodiment 1, its a plurality of controller 210 modules are connected into voltage-equalizing control circuit, the voltage signal of each module collection is formed equalizing busbar 4 by compiling, the signal of the signal of module and equalizing busbar 4 is sent into tuning controller 150 jointly and is extracted control signal, respectively each module drive wave mode is carried out copped wave by the control of magnetic switch and regulates; When controller 210 was used for the Balance Control of neutral point voltage of many level switches of individual module converter, described sampled signal and controlling object were each neutral point voltage in the switch converters; The signal of Switching Power Supply main circuit output is gathered with resistance sampling circuit.
The controller circuitry that the width of switch converters drive controlling pulse is regulated comprises two power amplification circuits, a magnetic switch, a dummy load, a magnetic reset signal generating circuit and a magnetic reset circuit.After pulse signal amplifies through power amplification 110 by magnetic switch 120 to its copped wave, promptly its pulsewidth is regulated according to reset signal.The sampled signal of tuning controller 150 by controlled device and the size of relatively having determined the magnetic reset signal of the signal of signal bus 4, thus reach the purpose of coming controlled device in the control circuit by the control pulsewidth.
This pulse-width modulator can be used for current-sharing, all press, exchanges balance of positive and negative weber of output, how electric mean pressure or the like.
In the current-sharing of multi-machine parallel connection system, this system composes in parallel power section by N Switching Power Supply main circuit, constitutes control section by the controller of the present invention of a PWM controller and every main circuit correspondence.The PWM controller offers each road main circuit unit by pwm signal of load end feedback generation through the pwm signal treatment circuit, and size and bus (busbar voltage is the mean value of every road sampled voltage) by the sample rate current signal relatively determine pwm signal is carried out the amplitude that copped wave is handled, if the current signal of a certain road sampling is greater than busbar voltage, deliver to main circuit unit after then this road pwm signal pulsewidth will be reduced, make the output voltage on this road reduce and make output current reduce, thereby reach the purpose of current-sharing.
Here, the PWM controller is common single-ended PWM controller, as UC3842 etc.Electric power main circuit can be any single-ended topology such as buck, boost, and forward etc. also can be as half-bridge, full-bridge such as recommends at the multiterminal topology, will utilize digital circuit to be divided into several roads to the signal after the pwm signal processing circuit processes when being used for these multiterminal topologys.
This system adopts the mean value current-equalizing method, and the signal bus is the mean value of each road current sampling signal.Be circuit of the present invention in the frame of broken lines, for convenience of description, only adopted two-way to set forth here, multichannel is the same with the two-way principle.The electric current on each road is sampled to the input of amplifier, relatively produce resetting current in the back with the bus signal, remove to control magnetic amplifier by the resetting current signal then the pwm signal on that big road of electric current is carried out copped wave, thereby thereby make the output voltage on that road that electric current is big reduce the output current on this road, and the electric current minimum a road still keep former PWM output signal.The identical PWM in each road can be not quite similar through pwm signal duty ratio after the processing of circuit of the present invention, and its size is just controlled by the level of the reset signal of each self feed back.
Equally, if current sampling signal is become voltage sampling signal, just become the even pressure controller of a plurality of Switching Power Supply series systems.
In addition, according to the difference of Be Controlled object, the present invention also can be used for the Balance Control of the neutral point voltage of three-level converter in the individual module, with the equalizing capacitance voltage of converter as sampled signal and controlling object.Use circuit of the present invention also can reach when being used for multi-level converter equally and well all press effect.
Controller can also be used for the balance of positive and negative weber (or ampere-second) of single AC converter, is the controlled quentity controlled variable of magnetic switch controller with the time integral amount of the output signal of converter, and output signal need not to compile can directly send the tuning controller positive-negative input end.When positive weber during greater than negative weber, then by circuit of the present invention cut down positive weber correspondence the PWM pulsewidth of switching tube, otherwise then cut down another road PWM pulsewidth.Thereby reach the purpose of control weber balance.
When the sharing control of circuit application of the present invention in the paralleling switch power-supply system, comprise that the signal processing circuit of a PWM controller and every main circuit correspondence and current sample constitute control section.The PWM controller is responsible for output voltage is fed back and produces a pwm signal.This pwm signal is sent to each road pwm signal treatment circuit, delivers to corresponding main circuit again after by circuit of the present invention this pwm signal being handled and drives.
As the present invention during as equalizing controller, the electric current on each road is sampled to the input of amplifier, relatively produce resetting current in the back with the bus signal, remove to control magnetic amplifier by the resetting current signal then the pwm signal on that big road of electric current is carried out copped wave, thereby thereby make the output voltage on that road that electric current is big reduce the output current on this road, reach the purpose of current-sharing.
In the application in the high pressure output of Switching Power Supply, need a plurality of power supply series connection sometimes.
In multi-level converter, require each dividing potential drop electric capacity to keep all pressing.Thereby, make all pressures of multi-level circuit be achieved by the sampling and the feedback of the present invention to the capacitance voltage of each level.
In the AC converter, direct current biasing can not occur, thereby must equate the weber of output positive voltage with the weber of negative voltage.When positive weber during, then cut down the PWM pulsewidth of the switching tube of positive weber correspondence, otherwise then cut down another road PWM pulsewidth by circuit of the present invention greater than negative weber.
Claims (5)
1. the control method of a plurality of switch converters pulse durations of scalable, input power amplifying circuit (110) input in its middle controller (210) links to each other with switch converters drive controlling pulse ends (1), and power output amplifying circuit (120) output links to each other with driving transformer signal input end (2) in the switch converters; Magnetic switch circuit (130) input links to each other with input power amplifying circuit (110) output, and output links to each other with power output amplifying circuit (120) input; Tuning controller (150) input links to each other with controlled device acquired signal end (3), signal bus (4) respectively, and output links to each other with magnetic reset circuit (140) input; Magnetic reset circuit (140) output links to each other with magnetic switch circuit (130) controlled terminal; The coordinated controller of controlled device acquired signal (150) from switch converters is by magnetic reset circuit (140) control magnetic switch circuit (130), copped wave characteristic by magnetic switch makes magnetic switch circuit (130) signal of switch converters drive controlling pulse ends (1) is adjusted into the signal of the driving transformer signal input end (2) in the switch converters, it is characterized in that: described controller (210) can a plurality ofly link to each other, form a control system, the switch converters drive controlling pulse ends (1) of all controllers (210) links together; Switch converters drive controlling pulse ends (1) the input PWM feedback signal that links to each other with PWM controller in the switch converters; The concrete variable of the curtage of Switching Power Supply main circuit output directly inserts controlled device acquired signal end (3) by the signal after handling; The signal of controlled device acquired signal end (3) inserts signal bus (4) by a resistance (RX) back; The signal bus (4) of all controllers (210) links together; Driving transformer signal input end (2) in the switch converters connects the controlled terminal of Switching Power Supply main circuit.
2. control method according to claim 1 is characterized in that: described Switching Power Supply main circuit can be a plurality of independent switch converters, also can be a plurality of switch modules in the switch converters.
3. control method according to claim 1, it is characterized in that: between a plurality of controllers (210) module and be unified into equalizing control circuit, the current signal of each controller (210) module collection is formed current equalizing bus bar (4) by compiling, the signal of the current signal of module and current equalizing bus bar (4) is sent into tuning controller (150) jointly and is extracted control signal, respectively each module drive wave mode is carried out copped wave by the control of magnetic switch circuit (130) and regulates.
4. control method according to claim 1, it is characterized in that: a plurality of controllers (210) module is connected into voltage-equalizing control circuit, the voltage signal of each module collection is formed equalizing busbar (4) by compiling, the signal of the voltage signal of module and equalizing busbar (4) is sent into tuning controller (150) jointly and is extracted control signal, respectively each module drive waveform is carried out copped wave by the control of magnetic switch circuit and regulates.
5. control method according to claim 1 is characterized in that: the signal of described switch converters drive controlling pulse ends (1) input can be a pwm signal, also can be switching value signal, the pulse signal of other frequency modulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100506404A CN1710790B (en) | 2005-07-08 | 2005-07-08 | Control system capable of regualting pulse width of multiple switch changer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2005100506404A CN1710790B (en) | 2005-07-08 | 2005-07-08 | Control system capable of regualting pulse width of multiple switch changer |
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| CN1710790A CN1710790A (en) | 2005-12-21 |
| CN1710790B true CN1710790B (en) | 2010-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104218782B (en) * | 2014-09-24 | 2017-06-13 | 阳光电源股份有限公司 | A kind of inverter and its dc bus circuit |
| CN112886794B (en) * | 2021-04-02 | 2024-04-09 | 江西力源海纳科技股份有限公司 | Control method and control device for high-power high-frequency switching power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469914B1 (en) * | 1999-01-14 | 2002-10-22 | Fairchild Semiconductor Corporation | Universal pulse width modulating power converter |
| CN1389971A (en) * | 2002-07-16 | 2003-01-08 | 艾默生网络能源有限公司 | Dc-to-DC converter with several outputs and its conversion method |
| CN1126236C (en) * | 2001-08-24 | 2003-10-29 | 艾默生网络能源有限公司 | Voltage balancer circuit for power converter |
-
2005
- 2005-07-08 CN CN2005100506404A patent/CN1710790B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469914B1 (en) * | 1999-01-14 | 2002-10-22 | Fairchild Semiconductor Corporation | Universal pulse width modulating power converter |
| CN1126236C (en) * | 2001-08-24 | 2003-10-29 | 艾默生网络能源有限公司 | Voltage balancer circuit for power converter |
| CN1389971A (en) * | 2002-07-16 | 2003-01-08 | 艾默生网络能源有限公司 | Dc-to-DC converter with several outputs and its conversion method |
Non-Patent Citations (1)
| Title |
|---|
| CN 1389971 A,全文. |
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