CN1007687B - Control apparatus used in independent-excitation dc motor and method for controlling dc motor in printer or the like - Google Patents
Control apparatus used in independent-excitation dc motor and method for controlling dc motor in printer or the likeInfo
- Publication number
- CN1007687B CN1007687B CN 86107904 CN86107904A CN1007687B CN 1007687 B CN1007687 B CN 1007687B CN 86107904 CN86107904 CN 86107904 CN 86107904 A CN86107904 A CN 86107904A CN 1007687 B CN1007687 B CN 1007687B
- Authority
- CN
- China
- Prior art keywords
- motor
- exciting current
- measured value
- control appliance
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B9/00—Portable power-driven circular saws for manual operation
- B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Motor And Converter Starters (AREA)
- Sawing (AREA)
Abstract
The invention relates to a control device used in motivation type DC driving motor in printing machine or other machines. The control device comprises a component which can generate filed current for magnetic field of the motor. The invention is characterized in that the component is connected with calculating equipment (12) and/or a measuring element which can adjust equipment and measure operational coefficient of a measuring motor (1). In accord with the result of the operational coefficient, the filed current can be equal to such result (measured value) so as to achieve preset working state. When armature voltage is relative to rotation speed (in given load), or armature current is relative to torque, the filed current is stabilizer at the measured value. The invention has the advantages of that the control device can correct valve of the filed current automatically.
Description
The present invention relates to a kind of control appliance that is used for the separated exciting direct-drive motor of printing machine or its similar machine, wherein have one to produce the device of supplying with motor-field winding exciting current.This rotating speed of motor can be calibrated by suitably selecting armature voltage, particularly at printing machine, especially under the situation of offset press, requires accurately to keep the rotating speed that is preset by console.Because have the tolerance of machining tolerance and material, the technical data of the motor of batch process also can be different.These tolerances show as the discrete of various machine parameters, therefore must calibrate exciting current in machine ground of a machine, make the certain relation of maintenance between armature voltage and the rotating speed, thereby can realize rotational speed regulation by armature voltage on certain working point.Except above-mentioned tolerance, machine parameter also can change owing to the variation of temperature and load.
Usually, motor described here is by AC network, and particularly three phase network is powered by controlled rectifier, is being provided with under the situation of regenerative braking, a controllable inverted converter also is set so that electric energy can be fed back to electrical network.But the present invention also is not limited thereto.
As is generally known, for example, motor is connected the back for the above-mentioned tolerance of compensation with control appliance, can calibrate exciting current by hand, thereby regulate excitation field; This adjusting is quite difficult, thereby needs skilled professional.So this will postpone the operation standby condition of the equipment of finishing on the one hand, cost also will increase on the other hand.As changing the device of supplying with exciting current in drive motors or the control appliance, particularly control appliance, so, also need the professional to finish above-mentioned adjustment process again.Well-known in addition, in excitation winding, to annotate with a constant current, above-mentioned tolerance then compensates by correspondingly changing armature voltage, is promptly adjusted in the armature supply loop.Yet,, also can depart from its rated value by changing the motor speed excursion that armature voltage can provide.May not reach required maximum speed when especially excitation is too strong under the maximum output voltage of rectifier.Though this can overcome by motor being applied lower rated voltage, at this moment motor must be in the infinity state.
Task of the present invention is a kind of a kind of control appliance of just having described when beginning of initiative, does not need by hand motor accurately to be adjusted, and can guarantee that motor is in certain operating condition that does not have above-mentioned shortcoming.
Can finish the work like this according to the present invention, being about to a computing equipment and/or control appliance is connected with the measuring mechanism of measurement motor operating state, and make it according to measurement result to running parameter, allow exciting current equal such numerical value (also claiming " measured value "), so that reach predetermined operating condition, for example at armature voltage and rotating speed (under given load), or predetermined relation of existence between armature supply and the torque, and exciting current is remained on this measured value, it is characterized in that, allow exciting current get such value, make consequent magnetic flux be arranged in below the saturation region of magnetization curve.
An advantage of the invention is does not need adjustment work complicated, that undertaken by the professional just can obtain correct exciting current value.Thereby the present invention do not need complicated, by the adjustment work that the professional carries out, can reach the desired operation state of drive unit and entire equipment.Also need in the armature supply loop, not compensate the tolerance of energized circuit.Can arrange like this this equipment, make control appliance fully automatically exciting current be adjusted to measured value.For making control appliance can finish this adjustment process automatically, must there be the data of required operating condition in the control appliance.For the sake of simplicity, only discuss below with regard to the relation between armature voltage and rotating speed.All motors that can be connected with given control appliance according to its driving power of producing for same manufactory, if there is identical relation between its armature voltage and the rotating speed, then this control appliance can be without any being connected with all these motors intrusively, and automatically provide required exciting current.Armature voltage can be connected with same control appliance with the mutually different motor of the relation of rotating speed, must in this control appliance, have the data of the motor model that is connected.For this reason, can be in digital storage with these storage, the layman can insert this memory in the socket of control appliance.
As is generally known the exciting current of input is generally got such value, make energized circuit be in the magnetic saturation state.Can reduce the variation of magnetic flux like this.Yet this will increase power dissipation and elevate the temperature.
In contrast, as providing in one embodiment, the present invention allows the non-saturated region of machine operation on magnetization curve, i.e. the very big zone of slope on the magnetization curve.Increasing exciting current can make magnetic flux increase.Under the situation that armature supply remains unchanged, the torque of motor will be proportional to magnetic flux.One embodiment of the invention allow, and for making the instantaneous increase of motor torque, allow exciting current increase and surpass measured value.At electric motor starting, just motor and coupled printing machine are in the moment of so-called " startup ", and the increase of this torque is essential.
Come adjustment control apparatus in one embodiment of the invention like this, make its exciting current when line voltage descends to be lower than measured value.Its advantage is, the ceiling voltage that can guarantee the supply armature that produced is always than the high predetermined value or higher of armature voltage of actual needs.Thereby can guarantee, can control and regulate rotating speed at any time, also can increase rotating speed by improving armature voltage.Obviously, should be noted that and reducing exciting current and keeping under the constant situation of armature supply that torque and power output also will reduce.
For making control appliance can often keep the measured value of this exciting current, and work as in order to change torque or to get this measured value more after changing because of line voltage changes the above-mentioned of exciting current that carries out, one embodiment of the invention propose, and should be provided with the memory of a storage exciting current measured value in this control appliance.
Some utilize control appliance to determine that the possibility of exciting current value to be adjusted will be illustrated in conjunction with the embodiments.
Other characteristics of the present invention and advantage can be illustrated with a block diagram and a claim that is decorated with the major part of invention in following embodiment of the present invention.Can realize each characteristics or any several characteristics in embodiments of the invention separately.
This unique figure has represented the embodiment of a rotary offset machine control appliance concisely.
The motor 1 that is occurred by the form with the separated exciting direct current machine drives one six colour wheel commentaries on classics offset press.Supply with the armature supply of motor 1 and the exciting current in the motor 1 magnetic field winding 2 with power divider 3, a controlled inverter (controllable silicon) is housed in the power divider, the electric energy that three phase network 4 is supplied with converts direct current to.Under the on-position of motor 1, electric energy can be fed back to electrical network 4 by power divider.The trigger impulse of power division 3 is produced by rectifier one computing equipment 5 and is defeated by power divider 3 by lead 7.Current measurement mechanism and voltage measurement mechanism are housed in the power divider 3, and measurement result is defeated by rectifier-computing equipment 5 through lead 8.Be defeated by rectifier-computing equipment 5 with the rotary speed signal generator 10 that the axle of motor 1 is connected by the signal that lead 11 will characterize motor speed.
Be connected with memory 14 with machine controling equipment 13 with the computing equipment 12 that rectifier-computing equipment 5 is coupled.Machine controling equipment 13 is by printer's operation of being responsible for printing, and the printer is engaged in and for example connects and cut off printing machine and carry out the rotating speed calibration on machine controling equipment.The driving of yet carrying out some other and motor 1 on machine controling equipment does not have the adjustment process and the control procedure of direct relation, for example adjustment work of printing machine register.
The parameter that has the printing machine of equipment shown in the parameter that drives the printing machine required motor and the figure in the memory 14.These parameters are particularly including the maximum armature current value that is allowed, the highest armature voltage value that is allowed, the initial nominal exciting current value of magnetic field winding 2, other random value of the rotating speed allowed band of motor 1 and some.
Those tolerances of having pointed out at the very start owing to existence when after installation, connecting for the first time, when the predetermined armature voltage of feeding by power divider 3 corresponding to certain rotating speed, and initial (tentative) that deposit in by memory 14 is when rated value is fed exciting current, the rotating speed of motor 1 can not be this given rotating speed just, and actual rotating speed can be bigger or littler than this.Press the program in the computing equipment 12, in the size that keeps changing under the constant situation of armature voltage exciting current, until reaching required rotating speed.Now, to deposit memory 14 in by computing equipment 12 corresponding to the exciting current value that reaches this rotating speed, and actual conditions will be deposited in, so, the exciting current value that this deposits in is not the initial theory value that deposits at first, but according to the resulting correction exciting current of accurate measurement value.If this equipment is connected once more,, just needn't redeterminate again because accurately known this exciting current value.Because exciting current can automatically be adjusted to required value in the above described manner, so computing equipment 12 also is a conditioning equipment simultaneously.Behind each connection equipment, also can redeterminate the exciting current value.
Can consider when needing that the voltage on the armature winding descends and armature reaction.
For determining to make motor 1 be in the required exciting current of intended operation state, also there is some other possibility.The initial nominal value i of at first given exciting current
FoWith specified armature voltage u
AOAt this moment rotating speed is ni, and ni is not equal to required rated speed n usually
O, reach this rated speed by changing armature voltage subsequently.At this moment the armature voltage value is u
AiActual required exciting current i
FiBe approximately:
i
Fi≈ (U
Ai×i
F0)/(u
A0)
Another method is at given exciting current initial nominal value i
FO, and at rated speed n
OThe time record armature voltage u
AiSituation under, change armature voltage subsequently, up to armature voltage rated value u
AOAt this moment rotating speed is n
iWith ratio n
O/ ni multiply by the initial nominal value i of exciting current
FO, obtain actual required exciting current value i equally
Fi
With the actual required exciting current value that said method records, as already mentioned, input store 14 is also often waited for and being called.
From the inactive state starting equipment, the bigger torque of needs when promptly so-called " startups ".Produce this big torque if can't help to improve armature supply, so, also can instantaneous raising exciting current and after startup, be reduced to storing value in the memory 14 again.
The method of the exciting current that said determination is actual required, such as already described, mainly can finish by the Automatic Program in the computing equipment.
Claims (4)
1, a kind of control appliance that is used for the separated exciting direct-drive motor of printing machine or its similar machine, wherein there is one to produce the device of supplying with motor-field winding exciting current, a computing equipment (12) and/or conditioning equipment are arranged, it is connected with the measuring mechanism of the operational factor of measuring motor (1) and makes it according to the measurement result to operational factor, allow exciting current equal such numerical value (" measured value "), so that reach predetermined operating condition, for example at armature voltage and rotating speed (under given load), or there is certain relation between armature supply and the torque, and exciting current is remained on this measured value, it is characterized in that, allow exciting current get such value, make consequent magnetic flux be arranged in below the saturation region of magnetization curve.
2, control appliance according to claim 1 is characterized in that, makes it to allow exciting current be increased to more than the measured value, so that instantaneous increase motor torque.
3, according to the described control appliance of top any one claim, it is characterized in that, make it under the situation that line voltage descends, to allow exciting current be lower than measured value.
4, according to the described control appliance of top any one claim, it is characterized in that, be provided with the memory (14) of a storage exciting current measured value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3541267.3 | 1985-11-22 | ||
| DE19853541267 DE3541267A1 (en) | 1985-11-22 | 1985-11-22 | Device for the zero setting of the cutting depth of the saw blade in portable circular saws driven by an electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86107904A CN86107904A (en) | 1987-07-08 |
| CN1007687B true CN1007687B (en) | 1990-04-18 |
Family
ID=6286533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86107904 Expired CN1007687B (en) | 1985-11-22 | 1986-11-22 | Control apparatus used in independent-excitation dc motor and method for controlling dc motor in printer or the like |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1007687B (en) |
| DE (1) | DE3541267A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3926759C1 (en) * | 1989-08-12 | 1990-08-23 | Abg-Werke Gmbh, 3250 Hameln, De | |
| DE4142282A1 (en) * | 1991-12-20 | 1993-07-01 | Bosch Gmbh Robert | LOCKING DEVICE |
| DE19633213A1 (en) * | 1996-08-17 | 1998-02-19 | Schloemann Siemag Ag | Control procedures |
| CN103752943B (en) * | 2013-09-25 | 2016-01-20 | 江苏苏美达五金工具有限公司 | A kind of portable circular saw |
| CN109821973B (en) * | 2019-04-03 | 2021-08-06 | 深圳市新联兴精密压铸有限公司 | A die frock for work piece spot facing work |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE6923546U (en) * | 1969-06-12 | 1970-03-05 | Festo Maschinenfabrik Fa | HAND CIRCULAR SAW |
| DE2216990C2 (en) * | 1972-04-08 | 1973-09-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Attachment of a guide carriage to a protective hood |
| DE7540608U (en) * | 1975-12-19 | 1976-06-10 | Stegmaier, Werner, 7083 Wasseralfingen | DEVICE FOR THE PRODUCTION OF SAW CUTS ON A ROW OF ADDITIONAL ROD ELEMENTS |
-
1985
- 1985-11-22 DE DE19853541267 patent/DE3541267A1/en not_active Withdrawn
-
1986
- 1986-11-22 CN CN 86107904 patent/CN1007687B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3541267A1 (en) | 1987-05-27 |
| CN86107904A (en) | 1987-07-08 |
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