CN2572640Y - Circuit for reducing temp. raising of locking motor - Google Patents
Circuit for reducing temp. raising of locking motor Download PDFInfo
- Publication number
- CN2572640Y CN2572640Y CN 02252051 CN02252051U CN2572640Y CN 2572640 Y CN2572640 Y CN 2572640Y CN 02252051 CN02252051 CN 02252051 CN 02252051 U CN02252051 U CN 02252051U CN 2572640 Y CN2572640 Y CN 2572640Y
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- driving element
- circuit
- charging
- charging capacitor
- switch group
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Abstract
The utility model relates to a circuit for reducing temperature rise of locking motor. The circuit comprises a driving element which has the function of automatic start, a coil group which is connected with the driving element, a charging switch group which is connected with the coil group to intercept the output of the driving element and a start charging capacitor which is used for charging when the automatic start function of the driving element is started, wherein the automatic start function of the driving element is started when a motor operates in the abnormal state; the driving element is used for controlling the coil group to be switched on and off. When the automatic start function of the driving element is started, the charging switch group is started and is used for accelerating the start charging capacitor for charging. The utility model uses the charging switch group for testing automatic start signals to shorten the switching on time of the automatic start of the coil; therefore, the rotary speed of the motor can be prevented from reducing and the motor can be prevented from locking or overheating when overcurrent generates to avoid the burnout of the motor. The utility model is especially suitable for a charging type driving element with an automatic start function.
Description
Technical field
The utility model relates to the motor protective circuit; especially a kind of reduction motor pins the temperature rise circuit; the aspect of utilizing detecting to start (Auto Restart) automatically shortens the automatically actuated ON time of this coil; it is overheated to avoid motor to burn to take place when preventing motor rotary speed decline, pin or producing overcurrent, and it is specially adapted to the automatically actuated driving element of charge type.
Background technology
Two kinds of abnormalities often take place in general fan motor in the use, and first kind of abnormality is to produce long-term dust accretions on the element, causes motor rotary speed to descend; Second kind of abnormality is that foreign matter is invaded flabellum or motor and caused motor to turn round when inner stuck.These two kinds of abnormalities all cause the electric current of coil winding sharply to rise.Big electric current at this coil winding produces a large amount of power consumptions, and these a large amount of power consumptions convert heat to and cause the jumbo rising of temperature, the further deterioration of power consumption on the accelerating coil winding, and so further the rising line goes out the temperature of resistance.The high temperature of this coil winding causes that rotten be full of cracks takes place the insulating barrier of enamelled wire, and the be full of cracks of this insulating barrier causes that this coil winding short circuit burns.
Commonly use fan motor and by coil winding, on motor horse drive IC, set up autostart function usually in order to prevent big electric current when the abnormality.This motor driven IC just starts fan motor once automatically every predetermined time interval when abnormality.If in the time of can't starting fan motor, then outage starts this fan motor more again automatically behind predetermined time interval earlier.
Fig. 1 discloses the schematic diagram of commonly using two-phase brush DC fan motor drive circuit.Please refer to shown in Figure 1ly, a motor drive circuit 1 comprises a driving element (drive IC) 10, two coil 11, two-transistor 12 and one and starts charging capacitor 13.This driving element 10 is controlled this coil 11 by the conducting of controlling this transistor 12 and the mode of closing.The autostart function of this motor drive circuit 1 is provided with predetermined ON and OFF time, and the length ratio of this ON and OFF then determines it is the charging and the discharge time of this startup charging capacitor 13.This motor drive circuit 1 by this ON and OFF time output signal with the conducting of controlling this transistor 12 and close.
Fig. 2 discloses the schematic diagram of commonly using single-phase DC brushless fan motor drive circuit.Please refer to shown in Figure 2ly, a motor drive circuit 2 comprises a driving element 20, a coil 21 and one and starts charging capacitor 22.This startup charging capacitor of these motor drive circuit 2 mats 22 decision ON and OFF time output signal are with the conducting of controlling this coil 21 and close.
Fig. 3 discloses the schematic diagram of commonly using two-phase brush DC fan motor drive circuit.Please refer to shown in Figure 3ly, a motor drive circuit 3 comprises a driving element 30, two coil 31 and one and starts charging capacitor 32.This startup charging capacitor of these motor drive circuit 3 mats 32 decision ON and OFF time output signal are with the conducting of controlling this coil 31 and close.
Fig. 4 A and 4B disclose the driving element of brush DC fan motor drive circuit and start the waveform schematic diagram of charging capacitor.Please refer to shown in Fig. 4 A, under the fan motor locking-in state, driving element is exported high levle (Hi) when starting charging capacitor C charging in T1, and driving element is exported low level (Lo) when starting charging capacitor C discharge in T2.Please refer to shown in Fig. 4 B, under the fan motor locking-in state, is that driving element is exported low level (Lo) in T1 when starting charging capacitor C charging, and driving element is exported Gao Zhun (Hi) when starting charging capacitor C discharge in T2.
Shown in Fig. 4 A and 4B, fix owing to start charging and the discharge time of charging capacitor C, so T1 and T2 ratio are fixing.
Shown in Fig. 1 to 4A, 4B, when starting charging capacitor 13,22,32 chargings, fan utilizes the maximum consumption electric current to start automatically in T1 for reaching, and under the fan motor locking-in state is not got rid of, continues to start automatically according to the T2 time interval.With regard to low air quantity or low-power fan motor, utilize the maximum consumption electric current to start automatically a large amount of power consumptions can't take place and produce the problem of high heat.But with regard to high air quantity or high power fan motor, when the fan motor abnormality, the immediate current of coil is up to more than several amperes, thereby can produce a large amount of power consumptions and high temperature, so that causes burning of motor.
In view of this, the shortcoming that the utility model improvement is above-mentioned, it utilizes the automatically actuated aspect of detecting to shorten the charging interval that starts charging capacitor, so shortens coil and burns to avoid motor in automatically actuated ON time.
Summary of the invention
The utility model main purpose provides a kind of reduction motor and pins the automatically actuated aspect shortening startup charging capacitor charging interval of its utilization detecting of temperature rise circuit team, so shorten coil in automatically actuated ON time, make the utlity model has and lower the effect that motor burns.
The utility model secondary objective provides a kind of reduction motor and pins the temperature rise circuit, it utilizes the automatically actuated aspect of detecting to shorten the startup charging capacitor charging interval, it is applicable to the automatically actuated driving element of charge type, makes to the utlity model has the effect that promotes design of drive circuit.
Pin the temperature rise circuit according to reduction motor of the present utility model, this circuit comprises a driving element, and it has autostart function, the autostart function of startup itself under the motor running abnormality; One coil groups, it is connected in this driving element, and this driving element is controlled the conducting of this coil groups and is closed; One charge switch group, the output that it is connected in this coil groups and intercepts this driving element; Reach one and start charging capacitor, its autostart function at this driving element charges when being activated; The autostart function of this driving element is activated, and then the charging of this startup charging capacitor is opened and quickened to this charge switch group.
Charge switch group of the present utility model is preferably pair of diodes or a transistor and the combination of a pair of electric capacity.
It is between this startup charging capacitor and the charge switch group that the utility model comprises resistance serial connection in addition, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor.
The aspect that the utility model utilizes the detecting of charge switch group to start (Auto Restart) automatically shortens the automatically actuated ON time of this coil, it is overheated to avoid motor to burn to take place when preventing motor rotary speed decline, pin or producing overcurrent, and it is specially adapted to the automatically actuated driving element of charge type.
Description of drawings
Fig. 1: the schematic diagram of commonly using two-phase brush DC fan motor drive circuit;
Fig. 2: the schematic diagram of commonly using single-phase DC brushless fan motor drive circuit;
Fig. 3: the schematic diagram of commonly using two-phase brush DC fan motor drive circuit;
Fig. 4 A: commonly use the driving element of brush DC fan motor drive circuit and the waveform schematic diagram of electric capacity;
Fig. 4 B: commonly use the driving element of brush DC fan motor office drive circuit and the waveform schematic diagram of electric capacity;
Fig. 5: the reduction motor of the utility model first preferred embodiment two-phase brush DC fan motor pins the schematic diagram of temperature rise circuit;
Fig. 6: the reduction motor of the utility model second preferred embodiment single-phase DC brushless fan motor pins the schematic diagram of temperature rise circuit;
Fig. 7: the reduction motor of the utility model the 3rd preferred embodiment single-phase DC brushless fan motor pins the schematic diagram of temperature rise circuit;
Fig. 8: the reduction motor of the 4th preferred embodiment two-phase brush DC fan motor pins the schematic diagram of temperature rise circuit.
Embodiment
Fig. 5 discloses the schematic diagram of the reduction motor pinning temperature rise circuit of the utility model first preferred embodiment two-phase brush DC fan motor; Fig. 6 discloses the schematic diagram of the reduction motor pinning temperature rise circuit of the second preferred embodiment single-phase DC brushless fan motor.Fig. 7 discloses the schematic diagram of the reduction motor pinning temperature rise circuit of the 3rd preferred embodiment single-phase DC brushless fan motor.Fig. 8 discloses the schematic diagram of the reduction motor pinning temperature rise circuit of the 4th preferred embodiment two-phase brush DC fan motor.
Please refer to shown in Fig. 5 to 8, corresponding being arranged at of fan motor circuit of first, second, third and fourth preferred embodiment of the utility model commonly used, thereby adopt the same reference numbers group to indicate at the structure same section, with easy be understand four kinds of different preferred embodiments of the utility model and commonly use between difference.The part technology contents of first, second, third and fourth preferred embodiment has been disclosed in commonly uses description, incorporates reference in this, will not step in detail and state.
Please refer to shown in Figure 5ly, the utility model first preferred embodiment one motor drive circuit 1 comprises a driving element 10, two coil 11, two-transistor 12, and starts a charging capacitor 13 and a charge switch group (pair of diodes) 14.14 of this charge switch groups are connected between this coil 11 and the startup charging capacitor 13 and intercept the output of this driving element 10.Under the motor running normal condition, the conducting and the mode of closing of these driving element 10 these transistors 12 of mat start are controlled this coil 11.Under the motor running abnormality, the autostart function of this driving element 10 is activated, and these charge switch group 14 auxiliary these start charging capacitor 13 chargings, to shorten the charging interval of this startup charging capacitor 13.In addition, a resistance 15 is serially connected between this startup charging capacitor 13 and the charge switch group 14, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor 13.
Shown in Fig. 4 A and 5, when the autostart function of this driving element 10 starts, in T1, export high levle (Hi), this startup charging capacitor 13 begins charging simultaneously.At this moment, the diode D1 of this charge switch group 14 or D2 introduce electric current to shorten the charging interval (T1) by high levle (Hi) alternate conduction and from coil 11.When this started charging capacitor 13 and has charged, this driving element 10 was exported low level (Lo) in T2, and this charge switch group 14 is ended by low level (Lo), and this startup charging capacitor 13 enters discharge time (T2), was discharged to ground connection.
Please refer to shown in Figure 6ly, the utility model second preferred embodiment one motor drive circuit 2 comprises a driving element 20, a coil 21, starts a charging capacitor 22 and a charge switch group (pair of diodes) 23.23 of this charge switch groups are connected between this coil 21 and the startup charging capacitor 22 and intercept the output of this driving element 20.Under the motor running normal condition, the conducting of these driving element 20 these coils 21 of control.Under the motor running abnormality, the autostart function of this driving element 20 is activated, and these charge switch group 23 auxiliary these start charging capacitor 22 chargings, to shorten the charging interval of this startup charging capacitor 22.In addition, a resistance 24 is serially connected with between this startup charging capacitor 22 and the charge switch group 23, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor 22.
Shown in Fig. 4 A and 6, when the autostart function of this driving element 20 starts, in T1, export high levle (Hi), this startup charging capacitor 22 begins charging simultaneously.At this moment, the diode D1 of this charge switch group 23 or D2 introduce electric current to shorten the charging interval (T1) by the high levle alternate conduction and from coil 21.When this started charging capacitor 22 and has charged, this driving element 20 was exported low level (Lo) in T2, and this charge switch group 23 is ended by low level, and this startup charging capacitor 22 enter discharge time (T2), be discharged to ground connection.
Please refer to shown in Figure 7, the motor drive circuit 2 of the utility model the 3rd preferred embodiment is same as second embodiment, it comprises a horse driving element 20, a coil 21, starts charging capacitor 22, a charge switch group 23, and this charge switch group 23 comprises a transistor 231 and two electric capacity 232.23 of this charge switch groups are connected between this coil 21 and the startup charging capacitor 22 and intercept the output of this driving element 20.Under the motor running normal condition, the conducting of these driving element 20 these coils 21 of control.Under the motor running abnormality, the autostart function of this driving element 20 is activated, and these charge switch group 23 auxiliary these start charging capacitor 22 chargings, to shorten the charging interval of this startup charging capacitor 22.In addition, a resistance 24 is serially connected with between this startup charging capacitor 22 and the charge switch group 23, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor 22.
Referring again to Fig. 4 B and shown in Figure 7, when the autostart function of this horse driving element 20 starts, in T1, export low level (Lo), this startup charging capacitor 22 begins charging simultaneously.At this moment, the base stage of the transistor 231 of this charge switch group 23 causes the C1 or the C2 start conducting of this two electric capacity 232 by low level, and introduces electric current to shorten the charging interval (T1) from power supply.When this started charging capacitor 22 and has charged, this driving element 20 was exported high levle (Hi) in T2, and this startup charging capacitor 22 enter discharge time (T2), be discharged to ground connection.
Please refer to shown in Figure 8ly, the motor drive circuit 3 of the utility model the 4th preferred embodiment comprises a driving element 30, two coil 31, and starts charging capacitor 32, a charge switch group 33, and this charge switch group 33 comprises a transistor 331 and two electric capacity 332.This switches set 33 is connected between this coil 31 and the startup charging capacitor 32 and intercepts the output of this driving element 30.Under the motor running normal condition, the alternate conduction of these driving element 30 these coils 31 of control.Under the motor running abnormality, the autostart function of this driving element 30 is activated, and these charge switch group 33 auxiliary these start charging capacitor 32 chargings, to shorten the charging interval of this startup charging capacitor 32.In addition, a resistance 34 is serially connected with between this startup charging capacitor 32 and the charge switch group 33, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor 32.
Shown in Fig. 4 B and 8 figure, when the autostart function of this driving element 30 starts, in T1, export low level (Lo), this startup charging capacitor 32 begins charging simultaneously.At this moment, transistor 331 base stages of this charge switch group 33 cause the C1 or the C2 start conducting of this two electric capacity 332 by low level, and this coil 31 is introduced electric currents to shorten the charging interval (T1) certainly.When this startup charging capacitor 32 had charged, this driving element 30 was exported Gao Zhun (Hi) in T2.And this startup charging capacitor 32 enter discharge time (T2), be discharged to ground connection.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those who are familiar with this art; in the spirit and scope that do not break away from the utility model; when can doing a little change and retouching, so the protection range of the utility model is as the criterion when looking claims scope person of defining.
Claims (8)
1, a kind of reduction motor pins the temperature rise circuit, and it is characterized in that: this circuit comprises:
One driving element, it has autostart function, the autostart function of startup itself under the motor running abnormality;
One coil groups, it is connected in this driving element, and this driving element is controlled the conducting of this coil groups and is closed;
One charge switch group, the output that it is connected in this coil groups and intercepts this driving element; And
One starts charging capacitor, and its autostart function at this driving element charges when being activated;
The autostart function of this driving element is activated, and then the charging of this startup charging capacitor is opened and quickened to this charge switch group.
2, circuit as claimed in claim 1 is characterized in that: other comprises a resistance and is connected in series between this startup charging capacitor and the charge switch group, and its resistance value is in order to determine the charging rate of acceleration of this startup charging capacitor.
3, circuit as claimed in claim 1 is characterized in that: the autostart function of this driving element is activated under the motor running abnormality, and when driving element output high levle, the charging of this startup charging capacitor is opened and quickened to this charge switch group.
4, circuit as claimed in claim 1 is characterized in that: the autostart function of this driving element is activated under the motor running abnormality, and when driving element output low level, the charging of this startup charging capacitor is opened and quickened to this charge switch group.
5, circuit as claimed in claim 1 is characterized in that: this coil groups is the two-phase coil.
6, circuit as claimed in claim 1 is characterized in that: this coil groups is a single phase winding.
7, circuit as claimed in claim 1 is characterized in that: this charge switch group is a pair of diodes.
8, circuit as claimed in claim 1 is characterized in that: this charge switch group is by a transistor and the combination of a pair of electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252051 CN2572640Y (en) | 2002-08-30 | 2002-08-30 | Circuit for reducing temp. raising of locking motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252051 CN2572640Y (en) | 2002-08-30 | 2002-08-30 | Circuit for reducing temp. raising of locking motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2572640Y true CN2572640Y (en) | 2003-09-10 |
Family
ID=33721669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02252051 Expired - Lifetime CN2572640Y (en) | 2002-08-30 | 2002-08-30 | Circuit for reducing temp. raising of locking motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2572640Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462152A (en) * | 2018-04-03 | 2018-08-28 | 上海灿瑞科技股份有限公司 | A kind of two-phase DC Brushless Motor output protection circuit |
-
2002
- 2002-08-30 CN CN 02252051 patent/CN2572640Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462152A (en) * | 2018-04-03 | 2018-08-28 | 上海灿瑞科技股份有限公司 | A kind of two-phase DC Brushless Motor output protection circuit |
| CN108462152B (en) * | 2018-04-03 | 2023-11-03 | 上海灿瑞微电子有限公司 | Output protection circuit of double-phase direct-current brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120830 Granted publication date: 20030910 |