CN102255525A - Vibration absorption circuit of DC (Direct-Current) motor for door opener - Google Patents
Vibration absorption circuit of DC (Direct-Current) motor for door opener Download PDFInfo
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- CN102255525A CN102255525A CN2011101694726A CN201110169472A CN102255525A CN 102255525 A CN102255525 A CN 102255525A CN 2011101694726 A CN2011101694726 A CN 2011101694726A CN 201110169472 A CN201110169472 A CN 201110169472A CN 102255525 A CN102255525 A CN 102255525A
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Abstract
The invention discloses a vibration absorption circuit of a DC motor for a door opener. The circuit comprises a high-voltage rectifying and filtering module, a high-frequency voltage conversion module, a low-voltage rectifying and filtering module, a control module, a power supply module and a feedback module, wherein the high-voltage rectifying and filtering module is used for rectifying and filtering input AC (Alternating-Current) commercial power into DC high voltage; the high-frequency voltage conversion module is used for performing electric-magnetic-electric conversion of the DC high voltage and outputting high-frequency AC low voltage; the low-voltage rectifying and filtering module is used for rectifying and filtering the high-frequency AC low voltage to form high-frequency DC low voltage; the control module is used for controlling the high-frequency voltage conversion module to perform the electric-magnetic-electric conversion; the input end of the power supply module is connected with the high-frequency voltage conversion module; the output end of the power supply module is connected to the control module and used for supplying working voltage to the control module; and the feedback module is used for sampling voltage from the output end of the low-voltage rectifying and filtering module and feeding back sampling information to the control module through an isolation element. According to the vibration absorption circuit of the DC motor for the door opener, disclosed by the invention, after the AC-DC conversion is carried out, the output ripple factor is less than 5%. According to the circuit disclosed by the invention, in the process of supplying power to the DC motor of the door opener, the vibration of the DC motor can be obviously reduced.
Description
Technical field
The present invention relates to a kind of door opener system weakening circuit, belong to the circuit engineering field.
Background technology
In using door opener (GDO) system of direct current machine, great majority are to power to direct current machine by linear power supply, linear power supply earlier with alternating current through the Industrial Frequency Transformer step-down, pass through the rectification circuit rectification again after, obtain the work of direct current dc motor.This mode is because to adopt Industrial Frequency Transformer be that the alternating current of f carries out step-down to frequency, pass through all-wave or half-wave rectifying circuit rectification again, thereby the direct voltage that obtains all is attended by the ripple that frequency is f or 2f, make direct current machine also produce the vibration that frequency is f or 2f thereupon, this ripple can have a strong impact on the direct current machine service behaviour, thereby makes complete machine produce severe noise.
In order to reduce noise, a kind of method is to take some vibration and noise reducing measures at motor, and this vibration and noise reducing measure that is in the rear end can not solve noise and vibration problem from root.Another kind method is to eliminate the vibration of direct current machine by reducing ripple, obtain having the direct voltage of small ripple voltage by filtering, as shown in Figure 3, linear power supply is realized must increasing the LC filter when low ripple is exported, inductance in the LC filter and electric capacity volume are big, the cost height is not suitable for using in the occasion of high-power, low ripple requirement.
Summary of the invention
Technical problem to be solved by this invention is the defective that overcomes prior art, a kind of door opener direct current machine weakening circuit is provided, in door opener system, use this voltage conversion circuit to make electric main alternation characteristic obtain isolating, thereby export direct voltage stably, can effectively eliminate the direct current machine vibration of using linear power supply to bring with this voltage to direct current machine power supply, thereby reduce the noise of complete machine greatly.
For solving the problems of the technologies described above, the invention provides a kind of door opener direct current machine weakening circuit, it is characterized in that, comprise
The high-voltage rectifying filtration module is used for the electric main rectifying and wave-filtering of input is become dc high voltage;
High frequency transformation module is used for the dc high voltage of described high-voltage rectifying filtration module output is carried out electricity-magnetic-electric conversion output high-frequency ac low-voltage;
The lower pressure rectifier filtration module, the high-frequency ac low-voltage rectifying and wave-filtering that is used for described high frequency transformation module output is the high frequency DC low-voltage;
Control module is used to control described high frequency transformation module and carries out electricity-magnetic-electric conversion;
Feedback module carries out voltage sample from described lower pressure rectifier filtration module output, and by isolated component sample information is fed back to described control module.
Also comprise supply module, its input is connected with described high frequency transformation module, and its output is connected to described control module, is used to described control module that operating voltage is provided;
Described high frequency transformation module comprises high frequency transformer.
The former limit of described high frequency transformer main winding is connected with described lower pressure rectifier filtration module, and the auxiliary winding in former limit is connected with described supply module, and the secondary winding is connected with described lower pressure rectifier filtration module.
Described control module comprises control chip, by the metal-oxide-semiconductor of described control chip control.
The power pins of described control chip is connected with described supply module.
The power pins of described control chip is connected with described high-voltage rectifying filtration module.
The grid of described metal-oxide-semiconductor is connected with described control chip output pin, and source electrode is connected with described control chip, and drain electrode is connected with the former limit main winding of described high frequency transformer.
Comprise the three-terminal voltage-stabilizing diode in the described feedback module, the isolated component that is connected with described three-terminal voltage-stabilizing diode cathode.
The plus earth of described three-terminal voltage-stabilizing diode, described lower pressure rectifier filtration module output voltage is connected with the reference voltage end of described three-terminal voltage-stabilizing diode after dividing potential drop.
Described isolated component is a photoelectrical coupler.
The beneficial effect that the present invention reached:
Adopt door opener direct current machine weakening circuit of the present invention to carry out the AC-DC conversion, owing to used high frequency transformer to carry out the transmission (electric energy-magnetic energy-electric energy) of energy, so effectively the alternation characteristic of input ac power is kept apart, the alternation characteristic of electric main can not be delivered to dc output end, make the direct voltage of output steady, the output ripple coefficient is less than 5%, can reduce the direct current machine vibration when powering to the direct current machine of door opener significantly.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is one embodiment of the invention schematic diagram;
Fig. 3 is the low ripple circuit diagram of linear power supply of the prior art.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
As shown in Figure 1, door opener direct current machine weakening circuit of the present invention comprises the AC input, the voltage of AC input input is carried out the high-voltage rectifying filtration module 1 of rectifying and wave-filtering, the output voltage of high-voltage rectifying filtration module 1 is a high direct voltage, be connected with the former limit of the high frequency transformer winding in the high frequency transformation module 5, carry out electricity-magnetic-electric conversion by high frequency transformation module 5, output high-frequency ac low tension.High frequency transformer secondary winding is connected with lower pressure rectifier filtration module 6, and the output dc low-voltage gives the direct current machine in the door opener system 7 power supplies behind lower pressure rectifier filtration module 6 rectifying and wave-filterings.The output of high-voltage rectifying filtration module 1 is connected to the control chip in the control module 2 simultaneously, makes control chip from high voltage startup, and the operating voltage after control chip starts is provided by supply module 3.The input of supply module 3 is connected with the auxiliary winding of the high frequency transformer in the high frequency transformation module 5, operating voltage is provided for control module 2 behind the auxiliary winding output carrying out of 3 pairs of high frequency transformers of the supply module rectifying and wave-filtering.Lower pressure rectifier filtration module 6 outputs are connected with feedback module 4 simultaneously, carry out voltage sample by feedback module 4 from lower pressure rectifier filtration module 6 outputs, and by isolated component with output direct voltage feedback information to control module 2, by control module 2 control high frequency transformation modules 5, and then the lower pressure rectifier filtration module 6 that is connected with high frequency transformation module 5 of control, thereby control output end direct voltage.
Fig. 2 is door opener direct current machine weakening circuit one an embodiment schematic diagram of the present invention.Circuit chief component and operation principle are as follows:
High-voltage rectifying filtration module 1 main filtering of EMI electromagnetic interference and the rectifying and wave-filtering of realizing input voltage.Input EMI circuit comprises capacitor C 2, C3 and an inductance, and current rectifying and wave filtering circuit mainly comprises diode D1, D2, capacitor C 1, C4, resistance R 1, R8.
Control module 2 realizes power supplys control, mainly comprises control chip U1, by the metal-oxide-semiconductor Q1 of control chip U1 control.High direct voltage power taking after handling from high-voltage rectifying filtration module 1 makes control chip U1 from high voltage startup.Offer the stable operating voltage of control chip U1 by the auxiliary winding of high frequency transformer T1 again, control chip U1 detects input, output voltage, thereby control output galvanic current is pressed.
Metal-oxide-semiconductor Q1 grid is connected with the OUT pin of control chip U1 by resistance R 13, R12, and metal-oxide-semiconductor Q1 drain electrode is connected with the former limit main winding of high frequency transformer T1, and metal-oxide-semiconductor Q1 source electrode is connected with the CS pin of control chip U1.
Control chip U1 judges conditions such as output feedback, input current, input voltages, and by control metal-oxide-semiconductor Q1, the duty of adjustment driven MOS pipe Q1 is operating frequency when, and then can adjust high frequency transformer T1, the final output voltage of regulating makes output voltage steady.
Diode D6, D8 in the supply module 3 carries out rectification to the auxiliary winding output voltage of high frequency transformer T1 and is connected to the voltage pin VDD of control chip U1, operating voltage is provided for control chip U1.By resistance R 28, R31 the auxiliary winding output voltage of high frequency transformer T1 is carried out dividing potential drop simultaneously, and voltage after partial is connected to the OVP pin of the control chip U1 in the control module 2, control chip U1 judges whether overvoltage of input voltage with this, and judges high frequency transformer T1 energy delivery situation.
Feedback module 4 carries out voltage sample from the dc low-voltage end of lower pressure rectifier filtration module 6 outputs, realizes monitoring and feedback to the direct voltage of lower pressure rectifier filtration module 6 outputs.Comprise three-terminal voltage-stabilizing diode U2 in the feedback module 4, the plus earth of three-terminal voltage-stabilizing diode U2, negative electrode is connected with feedback optocoupler DIP4, and lower pressure rectifier filtration module 6 output voltages are connected with the reference voltage end of three-terminal voltage-stabilizing diode after dividing potential drop.Preferred three ends of three-terminal voltage-stabilizing diode parallel voltage-stabilizing diode able to programme TL431.
Use three-terminal voltage-stabilizing diode U2 to do voltage reference in the feedback module 4 output voltage is monitored adjusting, thereby regulate feedback optocoupler DIP4, optocoupler DIP4 is connected to the pin FB of control chip U1.
High frequency transformation module 5 comprises high frequency transformer T1, and module 2 realizes the conversion of electric energy and magnetic energy by the sampling of the auxiliary winding output information of high frequency transformer being judged the energy storage of control high frequency transformer T1 and being discharged.
6 pairs of high frequency transformer output voltages of lower pressure rectifier filtration module carry out rectifying and wave-filtering, and current rectifying and wave filtering circuit mainly is made up of rectifying tube DN1, filter capacitor C9, C10, C11 etc.Rectifying tube DN1 input connects high frequency transformer T1 secondary winding, filter capacitor C9 in parallel, C10, C11 between output and the ground.The high frequency dc low-voltage of exporting behind module 6 rectifying and wave-filterings is that galvanic current is pressed, and this direct voltage is the direct current machine power supply of door opener system, greatly reduces the vibration of direct current machine.
Owing to used high frequency transformer T1 to carry out the transmission (electric energy-magnetic energy-electric energy) of energy, so effectively the alternation characteristic of input ac power is kept apart, steadily reliable in the DC power supply that output obtains.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (11)
1. a door opener direct current machine weakening circuit is characterized in that, comprises
The high-voltage rectifying filtration module is used for the electric main rectifying and wave-filtering of input is become dc high voltage;
High frequency transformation module is used for the dc high voltage of described high-voltage rectifying filtration module output is carried out electricity-magnetic-electric conversion output high-frequency ac low-voltage;
The lower pressure rectifier filtration module, the high-frequency ac low-voltage rectifying and wave-filtering that is used for described high frequency transformation module output is the high frequency DC low-voltage;
Control module is used to control described high frequency transformation module and carries out electricity-magnetic-electric conversion;
Feedback module carries out voltage sample from described lower pressure rectifier filtration module output, and by isolated component sample information is fed back to described control module.
2. door opener direct current machine weakening circuit according to claim 1 is characterized in that described high frequency transformation module comprises high frequency transformer.
3. door opener direct current machine weakening circuit according to claim 1, it is characterized in that, the former limit of described high frequency transformer main winding is connected with described lower pressure rectifier filtration module, and the auxiliary winding in former limit is connected with described supply module, and the secondary winding is connected with described lower pressure rectifier filtration module.
4. according to claim 1 or 3 described door opener direct current machine weakening circuit, it is characterized in that described control module comprises control chip, by the metal-oxide-semiconductor of described control chip control.
5. door opener direct current machine weakening circuit according to claim 4 is characterized in that the power pins of described control chip is connected with described supply module.
6. door opener direct current machine weakening circuit according to claim 4 is characterized in that the power pins of described control chip is connected with described high-voltage rectifying filtration module.
7. door opener direct current machine weakening circuit according to claim 4 is characterized in that the grid of described metal-oxide-semiconductor is connected with described control chip output pin, and source electrode is connected with described control chip, and drain electrode is connected with the former limit main winding of described high frequency transformer.
8. door opener direct current machine weakening circuit according to claim 1 is characterized in that, comprises the three-terminal voltage-stabilizing diode in the described feedback module, the isolated component that is connected with described three-terminal voltage-stabilizing diode cathode.
9. door opener direct current machine weakening circuit according to claim 8 is characterized in that, the plus earth of described three-terminal voltage-stabilizing diode, and described lower pressure rectifier filtration module output voltage is connected with the reference voltage end of described three-terminal voltage-stabilizing diode after dividing potential drop.
10. according to claim 1 or 8 described door opener direct current machine weakening circuit, it is characterized in that described isolated component is a photoelectrical coupler.
11. door opener direct current machine weakening circuit according to claim 1 is characterized in that, also comprises supply module, its input is connected with described high frequency transformation module, and its output is connected to described control module, is used to described control module that operating voltage is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101694726A CN102255525A (en) | 2011-06-22 | 2011-06-22 | Vibration absorption circuit of DC (Direct-Current) motor for door opener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101694726A CN102255525A (en) | 2011-06-22 | 2011-06-22 | Vibration absorption circuit of DC (Direct-Current) motor for door opener |
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| CN102255525A true CN102255525A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101694726A Pending CN102255525A (en) | 2011-06-22 | 2011-06-22 | Vibration absorption circuit of DC (Direct-Current) motor for door opener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183125A (en) * | 2015-10-26 | 2015-12-23 | 刘勇 | Case control circuit and case |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070996A1 (en) * | 2002-10-11 | 2004-04-15 | Carr Sheldon P. | Low voltage power supply system for an electric blanket or the like |
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2011
- 2011-06-22 CN CN2011101694726A patent/CN102255525A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070996A1 (en) * | 2002-10-11 | 2004-04-15 | Carr Sheldon P. | Low voltage power supply system for an electric blanket or the like |
Non-Patent Citations (1)
| Title |
|---|
| 衡耀付等: "一种基于UC3842的新型开关稳压电源设计", 《电力自动化设备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183125A (en) * | 2015-10-26 | 2015-12-23 | 刘勇 | Case control circuit and case |
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Application publication date: 20111123 |