CN1728551A - Controller capable of adjusting and controlling width of pulse - Google Patents
Controller capable of adjusting and controlling width of pulse Download PDFInfo
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- CN1728551A CN1728551A CN 200510050641 CN200510050641A CN1728551A CN 1728551 A CN1728551 A CN 1728551A CN 200510050641 CN200510050641 CN 200510050641 CN 200510050641 A CN200510050641 A CN 200510050641A CN 1728551 A CN1728551 A CN 1728551A
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Abstract
Being able to adjust PWM waveform and drive waveform in switching power supply, the disclosed controller is composed of input power amplification circuit, magnetic switch circuit, output power amplification circuit, and magnetic reset signal generation circuit in use for coordinating cross relation between controller and magnetic reset circuit. By using characters of magnetic switch capable of clipping square wave, the disclosed controller can adjust width of control pulse. Through feedback from sampled signal to be controlled, corresponding adjustment is carried out for original width of pulse. Through some simple circuits instead of functions of some special purpose chips or single chips, the invention saves cost, possessing high industrial useful value.
Description
Technical field
The present invention relates to a kind of controller, the especially a kind of controller that can regulate PWM waveform and drive waveforms in the Switching Power Supply.
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.
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 regulates by linearity amount control realization switch amount, i.e. paired pulses enforcement reprocessing finally realizes Be Controlled object in the switch converters: concrete variable such as curtage is regulated.Advantageous particularly in the pulse reprocessing that digital circuit produces.In single controller, can be used for realizing preventing the balance etc. of the neutral point of bridge circuit magnetic biasing and multi-level converter.
The described controller of patent of the present invention comprises the input power amplifying circuit, and magnetic switch circuit, power output amplifying circuit, magnetic reset signal generating circuit are tuning controller and magnetic reset circuit.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 end 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 input power amplifying circuit and power output are put people's circuit, adopt totem-pote circuit.
Above-mentioned magnetic reset circuit can adopt the current mode reset circuit, also can adopt the voltage-type reset circuit.
Above-mentioned adjuster can adopt pi controller.
Above-mentioned magnetic switch circuit can comprise magnetic switch and dummy resistance; Dummy resistance is in parallel with magnetic switch; The winding coupled that resets in magnetic switch and the magnetic reset circuit.
Above-mentioned magnetic switch circuit also can comprise magnetic switch, dummy resistance and switching tube; Dummy resistance is connected with magnetic switch; Switching tube is connected with magnetic switch; The winding coupled that resets in magnetic switch and the magnetic reset circuit.
Above-mentioned controller can a plurality ofly interconnect, and forms a control system.
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.
The present invention then utilizes magnetic switch to regulate the width that square wave carries out the Characteristics Control pulse of copped wave.By sampling feedback to manipulated signal, original pulsewidth is carried out corresponding adjusting, replace the function of some special chips or single-chip microcomputer by some simple circuit, provide cost savings, very high industrial use value is arranged.
Description of drawings
Fig. 1 circuit structure block diagram of the present invention;
A kind of circuit diagram of Fig. 2 controller circuitry of the present invention;
The another kind of circuit diagram of Fig. 3 controller circuitry of the present invention;
The work wave that Fig. 4 controller of the present invention produces;
The work wave of Fig. 5 magnetic switch voltage of the present invention;
Fig. 6 output services waveform of the present invention.
Among each figure: 1 is switch converters drive controlling pulse ends; 2 is the driving transformer signal input end in the switch converters; 3 is controlled device acquired signal end; 4 is signal bus end; 110 is the input power amplifying circuit; 120 is the power output amplifying circuit; 130 is the magnetic switch circuit; 140 is that magnetic reset circuit 150 is tuning controller; R0, R1, R2, R3, R4 are resistance; Q1, Q2, Q3, Q4, Q5 are triode; Q6 is a switching tube; T1 is a magnetic switch; T2 is the winding that resets; C1 is an electric capacity; U1 is an operational amplifier.
Embodiment
Specific embodiment 1: the described controller of patent of the present invention, comprise input power amplifying circuit 110, magnetic switch circuit 130, power output amplifying circuit 120, magnetic reset signal generating circuit are tuning controller 150 and magnetic reset circuit 140.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; Tuning controller 150 inputs link to each other with controlled device acquired signal end 3, signal bus end 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; Controlled device acquired signal 3 coordinated controllers from switch converters are by magnetic reset circuit 140 control magnetic switch circuit, make magnetic switch circuit 130 switch converters drive controlling pulse ends 1 is adjusted into the signal of driving transformer control signal 2 inputs in the switch converters by the copped wave characteristic of magnetic switch.Input power amplifying circuit 110 and power output amplifying circuit 120 adopt totem-pote circuit.Tuning controller 150 adopts current mode reset circuit adjuster to adopt pi controller.Magnetic switch circuit 130 comprises magnetic switch T1 and dummy resistance R0; Dummy resistance R0 is in parallel with magnetic switch T1; The winding T2 coupling that resets in magnetic switch T1 and the magnetic reset circuit 140.Controlled device is a plurality of switch converters.
Specific embodiment 2: the signal of switch converters drive controlling pulse ends described in the specific embodiment 1 input can be a pwm signal, also can be the switching value signal, pulse signal etc. of other frequency modulation.
Specific embodiment 3: the magnetic reset circuit described in the specific embodiment 1 adopts the voltage-type reset circuit.
Specific embodiment 4: the magnetic switch circuit 130 described in the specific embodiment 1 comprises magnetic switch T1, dummy resistance R0 and switching tube Q6; Dummy resistance R0 connects with magnetic switch T1; Switching tube Q6 connects with magnetic switch T1.
Magnetic amplifier because inductance value is very big, can be thought a switch that is in off-state unsaturated the time, then be equivalent to switch closure after it is saturated.Utilize the duty ratio that this characteristic can pulse signals to cut down.Its concrete waveform such as Fig. 4, Fig. 5 and Fig. 6.Because the electric current that pulse signal can provide is in most cases very limited, its output current deficiency is so that magnetic amplifier is saturated, thereby before magnetic amplifier, added the one-level power amplification circuit, make that magnetic amplifier can be saturated, if use other power amplification circuit also to be fine herein certainly, unique requirement is exactly that pulsewidth must be consistent with input pulse with duty ratio.The path that dummy load R0 and magnetic switch T1 provide this circuit pulse signals to carry out copped wave.R0 and T1 link then are the pulse signals through the needs after this processing of circuit, can be used for the driving of switch converters after this signal amplifies through totem, also can adopt optocoupler equally here.The amount that duty ratio is cut down is controlled by the resetting current that the control magnetic switch resets in the winding.The resetting current here produces by the common constant-current source circuit that is made of the PNP triode, and promptly current mode resets; Also can adopt constant voltage power supply circuit, be voltage-type and reset.Here mainly reset with current mode and set forth, the size of resetting current is then controlled by the amplifier of band integration ring.The input negative terminal C of amplifier is the variable that the sampling that will feed back is come out, and promptly by the above-mentioned pulse width modulation circuit of degenerative process this variable is regulated making it to reach the value that needs.The input anode D of amplifier then is by the Be Controlled object: concrete variable acquired signal such as curtage is compiled the signal bus that obtains through logical operation (be averaged, get maximum or get minimum etc.), and the signal bus also can be provided separately by external signal.Like this entire controller just become one can steady operation degeneration factor.
Controller of the present invention can be realized function by multiple magnetic switch circuit.As Fig. 3 is wherein a kind of, but the common feature of these circuit is to realize copped wave with magnetic switch.Q1, the totem driving switch pipe Q6 that Q2 constitutes, and Q3, Q4 constitute anti-phase totem and carry out signal output.When the input pulse signal when low, Q6 turn-offs, (Q3 Q4) is input as high level to anti-phase totem, and it is low that circuit is output as; When input pulse signal when being high, Q6 is open-minded, this moment since magnetic switch act on its saturated before, anti-phase totem is imported still high level, circuit is output as low, but after magnetic switch was saturated, anti-phase totem was input as low level, circuit is output as height.The same like this copped wave that has realized input pulse.
Claims (8)
1. the controller that can regulate the width of control impuls, comprise input power amplifying circuit (110), magnetic switch circuit (130), power output amplifying circuit (120), the magnetic reset signal generating circuit is tuning controller (150) and magnetic reset circuit (140), it is characterized in that: input power amplifying circuit (110) input links to each other with switch converters drive controlling pulse ends (1); 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 end (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), 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.
2. controller according to claim 1 is characterized in that: described input power amplifying circuit (110) and power output amplifying circuit (120) can be totem-pote circuits.
3. controller according to claim 1 is characterized in that: described magnetic reset circuit (140) can be current mode reset circuit or voltage-type reset circuit.
4. controller according to claim 1 is characterized in that: described tuning controller (150) can be a pi controller.
5. controller according to claim 1 is characterized in that: described magnetic switch circuit (130) comprises magnetic switch (T1) and dummy resistance (R0); Dummy resistance (R0) is in parallel with magnetic switch (T1); The winding that resets (T2) coupling in magnetic switch (T1) and the magnetic reset circuit (140).
6. controller according to claim 1 is characterized in that: described magnetic switch circuit (130) comprises magnetic switch (T1), switching tube (Q6) and dummy resistance (R0); Dummy resistance (R0) is connected with magnetic switch (T1); Switching tube (Q6) is connected with magnetic switch (T1); The winding that resets (T2) coupling in magnetic switch (T1) and the magnetic reset circuit (140).
7. controller 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 the switching value signal, pulse signal etc. of other frequency modulation.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described controllers, it is characterized in that: described controller can a plurality ofly interconnect, and forms a control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510050641 CN1728551B (en) | 2005-07-08 | 2005-07-08 | Controller capable of adjusting and controlling width of pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510050641 CN1728551B (en) | 2005-07-08 | 2005-07-08 | Controller capable of adjusting and controlling width of pulse |
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| Publication Number | Publication Date |
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| CN1728551A true CN1728551A (en) | 2006-02-01 |
| CN1728551B CN1728551B (en) | 2010-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510050641 Expired - Fee Related CN1728551B (en) | 2005-07-08 | 2005-07-08 | Controller capable of adjusting and controlling width of pulse |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103155A (en) * | 2009-12-21 | 2011-06-22 | 艾默生网络能源***北美公司 | Numerical control isolation sampling device |
| CN102214998A (en) * | 2010-04-07 | 2011-10-12 | 艾默生网络能源***北美公司 | Isolated sampling device for numerical-control LLC (logical link control) series resonance transformation circuit |
| CN101207326B (en) * | 2006-12-22 | 2012-05-02 | 约翰尼斯海登海恩博士股份有限公司 | Converter with a delay circuit for PWM signals |
| CN102103157B (en) * | 2009-12-21 | 2013-11-06 | 艾默生网络能源***北美公司 | Direct voltage isolated sampling device |
| CN105099430A (en) * | 2015-08-16 | 2015-11-25 | 重庆电子工程职业学院 | Power output circuit |
| CN105162436A (en) * | 2015-09-15 | 2015-12-16 | 上海华虹宏力半导体制造有限公司 | Duty ratio correction circuit |
| CN112000167A (en) * | 2020-09-23 | 2020-11-27 | 合肥科威尔电源***股份有限公司 | Multi-path parallel ultrahigh-speed low-voltage large-current pulse type constant current source |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3557059B2 (en) * | 1996-11-27 | 2004-08-25 | 富士通株式会社 | Pulse width control device |
| US6344980B1 (en) * | 1999-01-14 | 2002-02-05 | Fairchild Semiconductor Corporation | Universal pulse width modulating power converter |
-
2005
- 2005-07-08 CN CN 200510050641 patent/CN1728551B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207326B (en) * | 2006-12-22 | 2012-05-02 | 约翰尼斯海登海恩博士股份有限公司 | Converter with a delay circuit for PWM signals |
| CN102103155A (en) * | 2009-12-21 | 2011-06-22 | 艾默生网络能源***北美公司 | Numerical control isolation sampling device |
| CN102103157B (en) * | 2009-12-21 | 2013-11-06 | 艾默生网络能源***北美公司 | Direct voltage isolated sampling device |
| CN102214998A (en) * | 2010-04-07 | 2011-10-12 | 艾默生网络能源***北美公司 | Isolated sampling device for numerical-control LLC (logical link control) series resonance transformation circuit |
| CN102214998B (en) * | 2010-04-07 | 2014-01-29 | 艾默生网络能源***北美公司 | Isolated sampling device for numerical-control LLC (logical link control) series resonance transformation circuit |
| CN105099430A (en) * | 2015-08-16 | 2015-11-25 | 重庆电子工程职业学院 | Power output circuit |
| CN105099430B (en) * | 2015-08-16 | 2017-09-29 | 重庆电子工程职业学院 | A kind of power output circuit |
| CN105162436A (en) * | 2015-09-15 | 2015-12-16 | 上海华虹宏力半导体制造有限公司 | Duty ratio correction circuit |
| CN105162436B (en) * | 2015-09-15 | 2018-06-29 | 上海华虹宏力半导体制造有限公司 | A kind of duty ratio circuit for rectifying |
| CN112000167A (en) * | 2020-09-23 | 2020-11-27 | 合肥科威尔电源***股份有限公司 | Multi-path parallel ultrahigh-speed low-voltage large-current pulse type constant current source |
| CN112000167B (en) * | 2020-09-23 | 2021-11-12 | 合肥科威尔电源***股份有限公司 | Multi-path parallel ultrahigh-speed low-voltage large-current pulse type constant current source |
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| CN1728551B (en) | 2010-04-07 |
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Granted publication date: 20100407 Termination date: 20130708 |