CN1312836C - Cord tension control apparatus - Google Patents
Cord tension control apparatus Download PDFInfo
- Publication number
- CN1312836C CN1312836C CNB028261259A CN02826125A CN1312836C CN 1312836 C CN1312836 C CN 1312836C CN B028261259 A CNB028261259 A CN B028261259A CN 02826125 A CN02826125 A CN 02826125A CN 1312836 C CN1312836 C CN 1312836C
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- CN
- China
- Prior art keywords
- circuit
- motor
- mentioned
- constant
- voltage
- 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 - Fee Related
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
- B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2601/00—Problem to be solved or advantage achieved
- B65H2601/10—Ensuring correct operation
- B65H2601/12—Compensating; Taking-up
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
A cord tension control apparatus includes a brushless motor (M) generating counter electromotive force, a rectifier circuit (2) connected to a winding of the brushless motor (M), and a constant current circuit (3) connected to the rectifier circuit (2). A voltage circuit (4) giving forward direction bias voltage is inserted between the constant current circuit (3) and the rectifier circuit (2). Even when the rotation speed of the motor (M) is lowered and the output voltage is lowered, at least the forward direction bias voltage generated by the voltage circuit (4) is applied to the constant current circuit (3). Accordingly, there is no non-operation state of the constant current circuit (3) when the rotation speed of the motor (M) is lowered. A constant current can be assured and the tension of cords can be controlled to be always constant.
Description
Technical field
The present invention relates to give the cable class tenslator of certain tension force for the cable class of line, belt, ribbon and electric wire etc.
Background technology
Cable class tenslator is used in coiling machine that the line class is batched etc., can realize batching with the line class of certain tension force.
This tenslator has stretching pulley 11 and and stretching pulley 11 coaxial motor M set and that rotate simultaneously as shown in Figure 4.If 12 walkings of line class, then being situated between is rotated by stretching pulley 11 motor M, utilizes the torque that is produced among the motor M to give tension force to line class 12.
Above-mentioned motor M then produces back-emf voltage if apply rotation.If with among this back-emf voltage input motor M built-in constant-current circuit, no matter then the rotary speed of motor, torque all becomes necessarily, can give certain force of strain (referring to the spy open flat 11-325203 communique, the spy opens flat 11-301927 communique).
, have following problems with regard to above-mentioned cable class tenslator, even the decline of the transporting velocity of line class and its result are the rotary speed decline of motor, and then constant-current circuit can not be kept certain electric current.
Describe in detail is exactly that constant-current circuit utilizes transistorized collector current not become certain such principle because of the change change of collector emitter voltage (perhaps collector to-boase voltage) generally speaking.In order to make it certain collector current that flows, the collector emitter voltage of minimum existence necessity (perhaps collector to-boase voltage).
, if the rotary speed of motor descends, then the back-emf voltage of motor reduces.Owing to using the voltage that exists the diode because of rectification circuit to cause under the occasion of brushless motor to descend, exist the voltage that causes because of brush contact resistance to descend under the occasion of charged brush motor adopting, thereby the reduction of back-emf voltage all become remarkable during low rotary speed.
For this reason, can not guarantee necessary voltage in order to make constant-current circuit flow certain electric current, can't keep constant current.Therefore, the torque of motor does not become necessarily and not the line class is applied certain force of strain.
Summary of the invention
Therefore, purpose of the present invention is, realize a kind of can be regardless of the rotary speed of motor be certain cable class tenslator with Tension Control.
In addition, purpose of the present invention is to realize a kind of cable class tenslator that can be reclaimed the electric power that produces because of the motor rotation.
Cable class tenslator of the present invention comprises: pulley, and above-mentioned cable class is used to reel; Motor is located on the above-mentioned pulley, is used for according to rotary speed back-emf voltage taking place; Constant-current circuit, be connected with above-mentioned motor, potential circuit is inserted in series connection between above-mentioned constant-current circuit and motor, be used under the situation that the motor rotary speed descends, its output voltage descends, supply with forward bias to above-mentioned constant-current circuit, the output voltage values of above-mentioned potential circuit is selected as making the electric current of above-mentioned constant current circuit to become more than the certain required minimum voltage.
According to this structure, even the rotary speed of motor descends and output voltage descends, also give the minimum forward bias that applies of constant-current circuit, this forward bias is taken place by above-mentioned potential circuit.Thereby the constant-current circuit when the decline of motor rotary speed not occurring is working condition not, and guarantees constant current, and the tension force of line class always is controlled as necessarily.No matter so motor speed how, may command tension force is certain.
At above-mentioned motor is brushless motor, and is connected with under the occasion of rectification circuit with the coil of brushless motor, can compensate by the decline of above-mentioned potential circuit to diode drop in the rectification circuit.
Under the occasion that has a plurality of above-mentioned motor and these motor and above-mentioned constant-current circuit to be connected in series, for the structure of inserting above-mentioned potential circuit, can adopt 1 potential circuit corresponding with a plurality of motor.
Better in the present invention is, also comprises the electric power regenerative circuit, and this electric power regenerative circuit surpasses threshold value and occurs as condition with the back-emf voltage of motor, makes motor current flow to load.Adopt this electric power regenerative circuit, can when the motor rotary speed is high speed rotating,, effectively utilize energy, if this energy then became heat energy and was dropped in the past to being regenerated from the electric power that motor took place.
Cable class tenslator of the present invention also can possess: motor is used for according to rotary speed back-emf voltage taking place; Constant-current circuit is connected with above-mentioned motor; The electric power regenerative circuit is used for surpassing threshold value and occuring as condition with the back-emf voltage of motor, makes motor current flow to load.Adopt this electric power regenerative circuit, can effectively utilize electric power to being regenerated when high speed rotating from the electric power that motor took place.
As above, can adopt the simple structure of only inserting potential circuit, even when the motor low speed rotation, be certain also with Tension Control according to the present invention.
In addition, by reclaiming the electric power that produces because of the motor high speed rotating, can realize effective utilization of electric power.
Description of drawings
Fig. 1 is the circuit diagram of an example of expression tenslator of the present invention.
Fig. 2 is the circuit diagram of expression a example of cable class tenslator that a plurality of brushless motor M are connected in series.
Fig. 3 is non-brushless motor M and the present invention also is used in the charged brush motor circuit diagram in M ' time.
Fig. 4 is the oblique view of tenslator.
Embodiment
Below, by the reference accompanying drawing, embodiments of the present invention are described in detail.
Fig. 1 is the circuit diagram of an example of expression tenslator of the present invention.
The output voltage of rectification circuit 2 changes according to the change of brushless motor M rotary speed.Therefore, the output voltage of representing rectification circuit 2 with the function E (t) of time t.
Constant-current circuit 3 has constant current transistor Q1, resistance R 1, constant-voltage diode ZD and resistance R 2, and this constant-voltage diode is used for supplying with certain constant voltage to the base stage of constant current transistor Q1.
Moreover, insert constant voltage circuit 4 and make it to connect with constant-current circuit 3.The circuit structure of constant voltage circuit 4 is arbitrarily, can use well-known constant voltage circuit and TunePower etc.Because need be from the outside to constant voltage circuit 4 supply powers, so constant voltage circuit 4 can not be built in the brushless motor M.Therefore, constant voltage circuit 4 is connected with outside terminal T1, the T2 of brushless motor M that (zero mark is represented terminal in the drawings.Down together.)
The voltage of this constant voltage circuit 4 is called bias voltage E0.Bias voltage E0 is the certain value of generation time change not.
Between the constant current transistor Q1 of above-mentioned constant-current circuit 3 collector electrode-emitter, applied voltage E (t)+E0, this voltage are the voltage after the bias voltage E0 to the output voltage E (t) of above-mentioned rectification circuit 2 and constant voltage circuit 4 adds up to.
Above-mentioned constant current transistor Q1 is owing to supply with certain voltage by constant voltage transistor ZD to base stage, thereby always becomes on-state.
The voltage of being supplied with between collector electrode-emitter of above-mentioned constant current transistor Q1 even the rotary speed of brushless motor M descends and voltage E (t) even drop to 0, owing to there is constant voltage circuit 4, thereby is also minimumly guaranteed bias voltage E0.
For this reason, above-mentioned constant current transistor Q1 is flowed more than the minimum voltage of certain collector current, then can always make above-mentioned brushless motor M certain electric current that flows if the value of bias voltage E0 is chosen as.Therefore, even when low speed rotation, also the rotating torques of brushless motor M can be controlled to be necessarily.
Below, to use a plurality of brushless motor M1, M2 ..., the embodiment of the present invention during Mn is illustrated.In embodiments of the present invention, constant-current circuit 3 and constant voltage circuit 4 only be provided with separately 1 just can (therefore, each brushless motor M1, M2 ..., Mn becomes the not type of built-in constant-current circuit.)
Fig. 2 be to use a plurality of brushless motor M1, M2 ..., the circuit diagram of the tenslator 1 of Mn.
Each brushless motor M1, M2 ..., connect respectively on the Mn rectification circuit 21,22 ..., 2n, each rectification circuit 21,22 ..., lead-out terminal T1, the T2 of 2n ... be connected in series with constant-current circuit 3, electric power regenerative circuit 5 and constant voltage circuit 4.
With each rectification circuit 21,22 ..., the output voltage sum of 2n and constant voltage circuit 4 is designated as E0+E (t).The datum mark of voltage 0 is made as the negative terminal b of constant voltage circuit 4.
Above-mentioned output voltage E0+E (t) is added to constant-current circuit 3 and the electric power regenerative circuit 5 that is connected in series outward.
The effect of the effect of constant-current circuit 3 and constant voltage circuit 4 with adopt illustrated identical of Fig. 1, be used for making each brushless motor M1, M2 ..., Mn certain electric current that flows.
Electric power regenerative circuit 5 be brushless motor M1, M2 ..., Mn during than higher speed to the load ZL supply capability used circuit of storage power in capacitor C meanwhile.
Electric power regenerative circuit 5 possesses switching transistor Q2, is connected with mutual diode in series D and capacitor C and makes it in parallel with this switching transistor Q2.On capacitor C, can be connected to load ZL.The kind of this load ZL is (for example, load ZL also can be a ligthing paraphernalia) arbitrarily.
Supply with signal to the gating circuit of switching transistor Q2 from control circuit 6.Control circuit 6 is according to the output voltage E0+E (t) of above-mentioned brushless motor M and constant voltage circuit 4, if voltage E0+E (t) surpasses threshold value, then switching transistor is disconnected, if below the threshold value, then carries out the control that switching transistor is connected.Though control circuit 6 its structures are not made qualification, for example can adopt as using the well-known circuit of microcomputer.
It is exactly that if the rotary speed of brushless motor M is low and voltage E0+E (t) is below the threshold value, then switching transistor Q2 becomes on-state, so electric current flows through switching transistor Q2 that the action of top electric power regenerative circuit 5 is described.The resistance of electric power regenerative circuit 5 is low, and electric power regenerative circuit 5 consumes electric power hardly.At this moment, giving load ZL is electric charge supplying electric current stored from capacitor C.
If the rotary speed height of brushless motor M and voltage E0+E (t) surpass threshold value, then switching transistor Q2 becomes off-state, so electric current flows to load ZL through diode D.The equivalent resistance that comprises the electric power regenerative circuit 5 of load ZL increases, and consumes the electric power that is taken place by brushless motor M.In addition, also flow to capacitor C simultaneously, be stored at this energy.
Therefore, when high speed rotating, can energy recuperation be supplied with to load ZL by electric power regenerative circuit 5, if this energy does not have the occasion of electric power regenerative circuit 5 then should to take place and lose, therefore can seek effective utilization of electric power in constant-current circuit 3 and motor M.In addition, can also remove the heating panel that in the past was installed on the constant-current circuit 3.
Though above embodiments of the present invention are explained, enforcement of the present invention is not limited to aforesaid way.For example, not brushless motor M, the present invention also can be used in band brush motor M ' as shown in Figure 3.Under this occasion, just omit rectification circuit 2, the action of other constant-current circuit 3 and constant voltage circuit 4 is identical.In addition, can also impose various changes within the scope of the invention.
Claims (4)
1. cable class tenslator is used to control the tension force of cable class, it is characterized by to comprise:
Pulley, above-mentioned cable class is used to reel; Motor is located on the above-mentioned pulley, is used for according to rotary speed back-emf voltage taking place; Constant-current circuit is connected with above-mentioned motor,
Potential circuit is inserted in series connection between above-mentioned constant-current circuit and motor, be used under the situation that the motor rotary speed descends, its output voltage descends, supplying with forward bias to above-mentioned constant-current circuit,
The output voltage values of above-mentioned potential circuit is selected as making the electric current of above-mentioned constant current circuit to become more than the certain required minimum voltage.
2. cable class tenslator according to claim 1 is characterized by:
Above-mentioned motor is a brushless motor, is connected with rectification circuit on the coil windings of above-mentioned brushless motor.
3. cable class tenslator according to claim 1 and 2 is characterized by:
Above-mentioned motor is a plurality of, and these motor, above-mentioned constant-current circuit and above-mentioned potential circuit are connected in series.
4. cable class tenslator according to claim 1 and 2 is characterized by also and comprises:
The electric power regenerative circuit, it is condition that the back-emf voltage that is used for taking place with motor surpasses threshold value, makes motor current flow to load.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001391333A JP3876160B2 (en) | 2001-12-25 | 2001-12-25 | Tension control device for cords |
| JP391333/2001 | 2001-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1608341A CN1608341A (en) | 2005-04-20 |
| CN1312836C true CN1312836C (en) | 2007-04-25 |
Family
ID=19188506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028261259A Expired - Fee Related CN1312836C (en) | 2001-12-25 | 2002-12-18 | Cord tension control apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3876160B2 (en) |
| CN (1) | CN1312836C (en) |
| HK (1) | HK1075138A1 (en) |
| WO (1) | WO2003056695A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113460802A (en) * | 2021-05-27 | 2021-10-01 | 宜兴市博宇电力机械有限公司 | New energy tensioner and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334068Y (en) * | 1998-07-02 | 1999-08-18 | 温汉静 | Sound wave resonance instrument |
| JPH11301927A (en) * | 1998-04-23 | 1999-11-02 | Nitta Ind Corp | Tension controller |
| JPH11325203A (en) * | 1998-05-19 | 1999-11-26 | Nitta Ind Corp | Tension controller |
| CN2460796Y (en) * | 2000-12-28 | 2001-11-21 | 达鹰企业有限公司 | Device for regulating tension of transmission belt for wire cable processing machine |
-
2001
- 2001-12-25 JP JP2001391333A patent/JP3876160B2/en not_active Expired - Fee Related
-
2002
- 2002-12-18 WO PCT/JP2002/013204 patent/WO2003056695A1/en active Application Filing
- 2002-12-18 CN CNB028261259A patent/CN1312836C/en not_active Expired - Fee Related
-
2005
- 2005-08-22 HK HK05107321A patent/HK1075138A1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11301927A (en) * | 1998-04-23 | 1999-11-02 | Nitta Ind Corp | Tension controller |
| JPH11325203A (en) * | 1998-05-19 | 1999-11-26 | Nitta Ind Corp | Tension controller |
| CN2334068Y (en) * | 1998-07-02 | 1999-08-18 | 温汉静 | Sound wave resonance instrument |
| CN2460796Y (en) * | 2000-12-28 | 2001-11-21 | 达鹰企业有限公司 | Device for regulating tension of transmission belt for wire cable processing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1608341A (en) | 2005-04-20 |
| JP3876160B2 (en) | 2007-01-31 |
| HK1075138A1 (en) | 2005-12-02 |
| JP2003192232A (en) | 2003-07-09 |
| WO2003056695A1 (en) | 2003-07-10 |
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Granted publication date: 20070425 Termination date: 20111218 |