CN103051290A - Peak value holding driving method - Google Patents
Peak value holding driving method Download PDFInfo
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- CN103051290A CN103051290A CN2012104890499A CN201210489049A CN103051290A CN 103051290 A CN103051290 A CN 103051290A CN 2012104890499 A CN2012104890499 A CN 2012104890499A CN 201210489049 A CN201210489049 A CN 201210489049A CN 103051290 A CN103051290 A CN 103051290A
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Abstract
The invention discloses a peak value holding driving method. Time duration of peak value current values wished to maintain is divided into a plurality of sections according to fixed time intervals, and the fixed time intervals are called as step length. When a peak value enters other sections excepting a first section, a power supply is cut off from the inside of a peak value holding driving device, a step length timer is reset, and the power supply is opened from the inside. The step length timer is used for monitoring duration of each section. A peak of the peak value holding driving method only improves a peak value current section which is divided into a plurality of section, and a final section can be naturally transited to a holding current section. The peak value holding driving method enables the existing peak value holding driving piece to be free of hardware improvement, accurate control of any time duration of the peak value section is achieved, and the peak value holding driving method is particularly suitable to driving of a super-speed switch solenoid valve of an automobile automatic gearbox.
Description
Technical field
The application relates to a kind of peak value for inductive load and keeps (Peak ﹠amp; Hold) driving method.
Background technology
Inductive load refers to the load with the inductance parameter, has the characteristic of comparing a phase difference of load current lagging load voltage with power supply.Inductive load needs a ratio to keep the starting current of the required electric current that runs well much bigger (usually at 3-7 doubly) when starting.It is a kind of comparatively advanced driving method for inductive loads such as electromagnetically operated valve, solenoids that peak value keeps.
See also Fig. 1, this is the schematic diagram of the peak value maintenance driving method as an example of electromagnetically operated valve example, and all the other inductive loads similarly.
In the time of the controlled unlatching of electromagnetically operated valve, need to produce magnetic field to coil charges and produce displacement so that spool (or other executive components) is stressed with against the force of the spring and stiction, need larger peak value (Peak) electric current this time, to guarantee that spool can respond fast.
After electromagnetically operated valve was opened, spool only needed the less maintenance that can maintain open position (hold) electric current.
In the time of the electromagnetically operated valve controlled shutdown, loss of voltage keeps electric current also can rapidly disappear, and spool relies on spring force to be returned to scram position.
It is complicated that above-mentioned peak value keeps driving method to implement than common pulse-width modulation (PWM) driving, but the control better effects if.Because all can require in usually using inductive load unlatching and turn-off time as far as possible short, and peak value keeps driving method obviously to drive than pulse-width modulation on the turn-off time wanting much shorter, satisfies application demand easilier.
See also Fig. 2, realize that peak value keeps the driving element of driving method that three kinds of mode of operations are generally arranged.
The first is not regulate (No Regulation) pattern, does not use complicated driving function under this pattern, and peak value keeps driving element just to use as switching tube, and electric current is only determined by load.
The second is pure maintenance (Hold only) pattern, and after receiving the electric power starting signal that send the outside, peak value keeps just power-on internally of driving element under this pattern, and load current begins to rise.In case after being raised to the maintenance current value of setting, peak value keeps driving element to start a maintenance timer in inside, peak value keeps driving element to cut off the electricity supply internally simultaneously, and load current begins to descend.After keeping timer to reach setting-up time, peak value keeps again power-on internally of driving element, and load current rises again.In case after being raised to the maintenance current value of setting, peak value keeps driving element again to start inner maintenance timer, cut off the electricity supply internally simultaneously ...Continue and so forth, until receive the power-off signal that sends the outside.Thereby the load current under the pure Holdover mode is to keep current value to present the waveform of small size vibration as peak.
The third is that peak value keeps (Peak ﹠amp; Hold) pattern, after receiving the electric power starting signal that send the outside, peak value keeps just power-on internally of driving element under this pattern, and load current begins to rise.In case after being raised to the peak current value of setting, peak value keeps driving element to start a peak value timer in inside, with the method for pure Holdover mode load current is maintained small size waveform take peak current value as peak simultaneously.In case after the peak value timer reached setting-up time, peak value kept internally power cutoff of driving element, load current begins to descend.In case after dropping to the maintenance current value of setting, peak-holding circuit spare maintains to keep current value as the small size waveform of peak load current take the method for pure Holdover mode again, until receive the power-off signal that sends the outside.
Above-mentioned peak value keeps in the driving element, keeps the timing of current value, the timing that keeps timer, peak current value, peak value timer all can arrange.It is available that yet existing peak value keeps driving element only to provide quantity several grades of set points seldom for parameters, can not realize the accurately controlled of arbitrary value.For example, some inductive load need to maintain peak current value long time range, and existing peak value keeps driving element can't satisfy this demand.
Summary of the invention
The application's technical problem to be solved provides a kind of peak value and keeps driving method, can realize the holding time of peak current value of random time length.
For solving the problems of the technologies described above, the time span that the application's peak value keeps driving method hope to be kept peak current value is divided into multistage according to regular time interval (being called step-length); When entering all the other each sections except first paragraph, peak value keeps driving element first at inner power cutoff, the step-length timer is resetted, immediately power-on internally again; Described step-length timer is used for monitoring the duration of each section.
When the time span of keeping peak current value when hope was not the integral multiple of described step-length, the time span of then hope being kept peak current value was divided into a plurality of step-length Duan Yuyi remainder sections; The time span of described step-length section equals step-length; The time span of described remainder section is less than step-length; Described remainder section is as first paragraph.
When entering all the other each sections except first paragraph, peak value keeps driving element first at inner power cutoff, the step-length timer is resetted, through power-on internally again after 15～25 microseconds.
The application's peak value keeps driving method only the peak current section to be improved, and it is divided into multistage, and final stage can naturally be transitioned into and keep the electric current section.The method keeps driving element need not carry out hardware to existing peak value changing, and has just realized random time length accurately controlled of peak current section, is specially adapted to the driving of the high-speed switch electromagnetic valve of automatic gearbox of vehicles.
Description of drawings
Fig. 1 is the principle schematic that peak value keeps driving method;
Fig. 2 is the schematic diagram that peak value keeps three kinds of mode of operations of driving element;
Fig. 3 is the flow chart that the application's peak value keeps driving method;
Fig. 4 is the principle schematic that the application's peak value keeps driving method;
Fig. 5 is the experiment effect figure that the application's peak value keeps driving method.
Embodiment
See also Fig. 3, the below will keep driving method to be described in detail to the application's peak value with a specific embodiment.Fig. 4 be the load current of the described embodiment of Fig. 3 along with the schematic diagram of time fluctuation, Fig. 5 is the experimental verification oscillogram of the described embodiment of Fig. 3.
Suppose that some inductive load requirements keep 8ms with peak current value, then be down to the maintenance electric current.And existing peak value keeps driving element the timing of peak value timer can be made as 0.6ms, 0.9ms, 1.2ms.
According to the described method of the application, for example first 1.2ms is made as step-length, duration (being the duration of the peak current section) 8ms that again hope is kept peak current value is divided into multistage according to the step-length of 1.2ms.Because 8ms can not be divided exactly by 1.2ms, thereby divide the result and be comprised of six durations step-length section that is 1.2ms and duration remainder section by 0.8ms, wherein the remainder section is as first paragraph, and six step-length sections are as second to the 7th section.
Preferably, peak value is kept the timing of the peak value timer in the driving element be made as step-length.
More preferably, peak value is kept the longest timing of the peak value timer in the driving element be made as step-length.
After receiving the electric power starting signal that send the outside, peak value keeps just power-on internally of driving element, enters the first paragraph of peak current section;
From entering that second segment begins until later on during each section, peak value keeps driving element first at inner power cutoff, thereby the step-length timer is resetted, power-on internally more immediately.This section internally power cutoff is preferably 15～25 microseconds to the time span of inner power-on, for example 20 microseconds.
Each section duration is monitored by the step-length timer.Described step-length timer can directly keep the peak value timer in the driving element to replace with peak value.
At the 7th section end, the duration of the peak current section of 8ms finishes, and according to the existing peak value Holdover mode of peak value maintenance driving element, will naturally be transitioned into maintenance electric current section.Transition method is: in case after the step-length timer of final stage reached setting-up time, peak value kept internally power cutoff of driving element, load current begins to descend.In case after dropping to the maintenance current value of setting, peak-holding circuit spare maintains to keep current value as the small size waveform of peak load current take the method for pure Holdover mode again, until receive the power-off signal that sends the outside.
Can find further from Fig. 4, Fig. 5, after described peak current section is divided into multistage, may need through multistage that peak value keeps the current value of driving element slowly to increase, and reaches peak current value, this is the process of a gradual change.In remaining embodiment, if step value arranges greatly or peak current value arranges littlely, also may only need through one section, peak value keeps the current value of driving element can reach peak current value.
The application's peak value maintenance driving method is particularly suitable for the MCU(microcontroller by automobile) realize.All include the comparison output register among the MCU and register is set.For example relatively output register is 16, then increases in continuous circulation from 0～65535 always, and each cycle that increases is 0.0125 microsecond.When relatively output register is identical with the value that register is set, then MCU can trigger an interruption, is used for carrying out that peak value maintenance driving element is opened internally or the operation of power cutoff.By change the value of register is set, just can changes arbitrarily the setting-up time of step-length timer.
The application is to the splitting scheme of peak current section, both guaranteed the waveform continuity of load current in the peak current section, also make simultaneously it arrive maintenance electric current section (the experimental verification waveform as shown in Figure 5) by automatic Transition, thereby realized the arbitrarily accurate control of the duration of peak current section.
Be the application's preferred embodiment only below, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the application's the protection range.
Claims (9)
1. a peak value keeps driving method, it is characterized in that, the time span that described method is kept hope peak current value according to regular time the interval be divided into multistage, described regular time the interval be called step-length; When entering all the other each sections except first paragraph, peak value keeps driving element first at inner power cutoff, the step-length timer is resetted, immediately power-on internally again; Described step-length timer is used for monitoring the duration of each section.
2. peak value according to claim 1 keeps driving method, it is characterized in that, when the time span of keeping peak current value when hope was not the integral multiple of described step-length, the time span of then hope being kept peak current value was divided into a plurality of step-length Duan Yuyi remainder sections; The time span of described step-length section equals step-length; The time span of described remainder section is less than step-length; Described remainder section is as first paragraph.
3. peak value according to claim 1 keeps driving method, it is characterized in that, when entering all the other each sections except first paragraph, peak value keeps that driving element is first to be resetted the step-length timer at inner power cutoff, through power-on internally again behind 15～25 μ s.
4. peak value according to claim 1 keeps driving method, it is characterized in that, described step-length timer keeps the peak value timer in the driving element to replace with peak value.
5. peak value according to claim 1 keeps driving method, it is characterized in that, keeps the timing of the peak value timer in the driving element to be made as step-length peak value.
6. peak value according to claim 5 keeps driving method, it is characterized in that, keeps the longest timing of the peak value timer in the driving element to be made as step-length peak value.
7. peak value according to claim 1 keeps driving method, it is characterized in that, in the end one section end is transitioned into maintenance electric current section naturally; Transition method is: in case after the step-length timer of final stage reached setting-up time, peak value kept internally power cutoff of driving element, load current begins to descend; In case after dropping to the maintenance current value of setting, peak-holding circuit spare maintains to keep current value as the small size waveform of peak load current take the method for pure Holdover mode again, until receive the power-off signal that sends the outside.
8. peak value according to claim 1 keeps driving method, it is characterized in that, through described one or more snippets, peak value keeps the current value of driving element just can rise to peak current value.
9. peak value according to claim 1 keeps driving method, it is characterized in that, described step-length timer is by the comparison output register of MCU and register is set realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489049.9A CN103051290B (en) | 2012-11-27 | 2012-11-27 | Peak value keeps driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489049.9A CN103051290B (en) | 2012-11-27 | 2012-11-27 | Peak value keeps driving method |
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| CN103051290A true CN103051290A (en) | 2013-04-17 |
| CN103051290B CN103051290B (en) | 2016-04-27 |
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| CN201210489049.9A Active CN103051290B (en) | 2012-11-27 | 2012-11-27 | Peak value keeps driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107580663A (en) * | 2015-03-18 | 2018-01-12 | 自动开关公司 | Ensure the release of the solenoid valve by peak holding driver control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03270406A (en) * | 1990-03-20 | 1991-12-02 | New Japan Radio Co Ltd | Peak current hold circuit |
| CN1989689A (en) * | 2004-07-23 | 2007-06-27 | 罗姆股份有限公司 | Peak hold circuit, motor drive/control circuit having the same, and motor apparatus having the same |
-
2012
- 2012-11-27 CN CN201210489049.9A patent/CN103051290B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03270406A (en) * | 1990-03-20 | 1991-12-02 | New Japan Radio Co Ltd | Peak current hold circuit |
| CN1989689A (en) * | 2004-07-23 | 2007-06-27 | 罗姆股份有限公司 | Peak hold circuit, motor drive/control circuit having the same, and motor apparatus having the same |
Non-Patent Citations (2)
| Title |
|---|
| 刘华柏等: "适用于窄脉冲的跨导型峰值保持电路设计", 《光学技术》, vol. 34, 31 December 2008 (2008-12-31), pages 233 - 235 * |
| 郭永新等: "新型跨导型脉冲峰值保持器", 《青岛大学学报》, vol. 16, no. 4, 31 December 2001 (2001-12-31), pages 104 - 106 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107580663A (en) * | 2015-03-18 | 2018-01-12 | 自动开关公司 | Ensure the release of the solenoid valve by peak holding driver control |
| CN107580663B (en) * | 2015-03-18 | 2019-04-23 | 自动开关公司 | Ensure the release of the solenoid valve by peak holding driver control |
| US10295077B2 (en) | 2015-03-18 | 2019-05-21 | Automatic Switch Company | Assuring dropout of solenoid valve controlled by peak-and-hold driver |
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| Publication number | Publication date |
|---|---|
| CN103051290B (en) | 2016-04-27 |
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