CN204886701U - A excitation power supply for solenoid valve - Google Patents
A excitation power supply for solenoid valve Download PDFInfo
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- CN204886701U CN204886701U CN201520712688.6U CN201520712688U CN204886701U CN 204886701 U CN204886701 U CN 204886701U CN 201520712688 U CN201520712688 U CN 201520712688U CN 204886701 U CN204886701 U CN 204886701U
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Abstract
The utility model discloses an excitation power supply for solenoid valve, this product output the power is including input rectifier unit, input filter unit, switch tube, output afterflow unit, output filtering unit, auxiliary electrical power source, PWM the control unit and time delay steady voltage unit. Utilize time delay steady voltage unit to realize that the driving voltage is high, working effect that operating voltage is low to the hold time of driving voltage can set up as required, has characteristics such as output ripple is little, the precision of voltage regulation is high, adaptive capacity to environment is strong, reliability height.
Description
Technical field
The utility model is specifically related to that a kind of driving voltage is high, operating voltage is low, for the excitation power supply of solenoid valve market.
Background technology
At present, electromagnetically operated valve is widely used in the controls, and gives the power supply of solenoid valve, and great majority adopt rectification filtering power, by controlling full-wave rectification and halfwave rectifier, realizes driving voltage high, the working effect that operating voltage is low.Traditional solenoid valve power supply ripple is large, the precision of voltage regulation is low, adaptive capacity to environment is poor, and reliability can not meet important events application.
Utility model content
The utility model technical issues that need to address are just the defect overcoming prior art, provide a kind of excitation power supply for electromagnetically operated valve that a kind of technical indicator is excellent, ripple is little, the precision of voltage regulation is high, adaptive capacity to environment is strong, reliability is high.
The utility model adopts following technical scheme:
For an excitation power supply for electromagnetically operated valve, comprise input rectifying unit, input filter unit, switching tube, output afterflow unit, output filtering unit, accessory power supply, PWM control unit and time delay voltage regulation unit.
AC-input voltage is through rectification unit, after input filter unit and switching tube, change input direct voltage into high-frequency ac voltage, again through exporting afterflow unit, output filtering unit is transformed into direct voltage output, output voltage signal is through the square-wave signal duty ratio of PWM control unit adjustment driving switch pipe, realize the stable of output drive voltage, the magnitude of voltage of holding time of driving voltage and operating voltage is set by time delay regulator control block again, AC-input voltage is through input rectifying, pulsating direct current is changed into after filter unit, pulsating direct current enters switching tube Q1, again through exporting afterflow unit, export after output filtering unit, output voltage signal is fed back to PWM control unit to compare, the square-wave signal driving switch pipe Q1 conducting produced by PWM control unit and shutoff, realize output voltage stability.
Described input rectifying unit is made up of rectifier bridge D1, and input filter unit is made up of electric capacity C1, resistance R1;
Described output afterflow unit is made up of afterflow diode D4, energy storage inductor L1 and storage capacitor C2, and output filtering unit is made up of common mode inductance L2 and filter capacitor C3;
Described Auxiliary Power Units is made up of transformer T1, rectifier bridge D2, filter capacitor C4, filter capacitor C5 and pressurizer U1, and Auxiliary Power Units is that PWM control unit is powered;
Described PWM control unit is made up of pwm chip U3, and export square-wave signal driving switch pipe Q1 conducting and cut-off by PWM control unit, make switching tube Q1 be operated on off state, PWM control unit also can realize excess current protective function;
Described time delay regulator control block is made up of resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9, diode D6, benchmark 431 and photoelectrical coupler U4, wherein, resistance R7 and electric capacity C9 forms delay circuit, 5V voltage is that electric capacity C9 charges through resistance R7, and when the voltage at electric capacity C9 two ends is higher than 2.5V, benchmark U2 overturns, photoelectrical coupler U4 conducting, by resistance R18, resistance R19 short circuit, output voltage reduces, for electromagnetically operated valve provides normal operational voltage value.
beneficial effect
It is high that the utility model has driving voltage, and operating voltage is low, and ripple is little, the precision of voltage regulation is high, adaptive capacity to environment is strong, reliability high.
The utility model has the following advantages compared with traditional solenoid valve power supply:
1, self is with EMC filter circuit, meets that ripple is little, EMC Requirements;
2, self is with controlling circuit of voltage regulation and delay control circuit, can arrange holding time and the magnitude of voltage of operating voltage of driving voltage;
3, the precision of voltage regulation is exported high;
4, all-metal sealing, entity embedding, resistance to harsh environment for use.
Accompanying drawing explanation
Fig. 1 is the utility model schematic block circuit diagram;
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done explanation.
As shown in the figure, a kind of excitation power supply for electromagnetically operated valve, comprises input rectifying unit, input filter unit, switching tube, output afterflow unit, output filtering unit, accessory power supply, PWM control unit and time delay voltage regulation unit.
AC-input voltage is through rectification unit, after input filter unit and switching tube, change input direct voltage into high-frequency ac voltage, again through exporting afterflow unit, output filtering unit is transformed into direct voltage output, output voltage signal is through the square-wave signal duty ratio of PWM control unit adjustment driving switch pipe, realize the stable of output drive voltage, the magnitude of voltage of holding time of driving voltage and operating voltage is set by time delay regulator control block again, AC-input voltage is through input rectifying, pulsating direct current is changed into after filter unit, pulsating direct current enters switching tube Q1, again through exporting afterflow unit, export after output filtering unit, output voltage signal is fed back to PWM control unit to compare, the square-wave signal driving switch pipe Q1 conducting produced by PWM control unit and shutoff, realize output voltage stability.
Described input rectifying unit is made up of rectifier bridge D1, and input filter unit is made up of electric capacity C1, resistance R1;
Described output afterflow unit is made up of afterflow diode D4, energy storage inductor L1 and storage capacitor C2, and output filtering unit is made up of common mode inductance L2 and filter capacitor C3;
Described Auxiliary Power Units is made up of transformer T1, rectifier bridge D2, filter capacitor C4, filter capacitor C5 and pressurizer U1, and Auxiliary Power Units is that PWM control unit is powered;
Described PWM control unit is made up of pwm chip U3, and export square-wave signal driving switch pipe Q1 conducting and cut-off by PWM control unit, make switching tube Q1 be operated on off state, PWM control unit also can realize excess current protective function;
Described time delay regulator control block is made up of resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9, diode D6, benchmark 431 and photoelectrical coupler U4, wherein, resistance R7 and electric capacity C9 forms delay circuit, 5V voltage is that electric capacity C9 charges through resistance R7, and when the voltage at electric capacity C9 two ends is higher than 2.5V, benchmark U2 overturns, photoelectrical coupler U4 conducting, by resistance R18, resistance R19 short circuit, output voltage reduces, for electromagnetically operated valve provides normal operational voltage value.
Last it is noted that obviously, above-described embodiment is only for the utility model example is clearly described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among protection range of the present utility model.
Claims (6)
1. for an excitation power supply for electromagnetically operated valve, it is characterized in that: comprise input rectifying unit, input filter unit, switching tube, output afterflow unit, output filtering unit, accessory power supply, PWM control unit and time delay voltage regulation unit, AC-input voltage is through rectification unit, after input filter unit and switching tube, change input direct voltage into high-frequency ac voltage, again through exporting afterflow unit, output filtering unit is transformed into direct voltage output, output voltage signal is through the square-wave signal duty ratio of PWM control unit adjustment driving switch pipe, realize the stable of output drive voltage, the magnitude of voltage of holding time of driving voltage and operating voltage is set by time delay regulator control block again, AC-input voltage is through input rectifying, pulsating direct current is changed into after filter unit, pulsating direct current enters switching tube Q1, again through exporting afterflow unit, export after output filtering unit, output voltage signal is fed back to PWM control unit to compare, the square-wave signal driving switch pipe Q1 conducting produced by PWM control unit and shutoff, realize output voltage stability.
2. a kind of excitation power supply for electromagnetically operated valve according to claim 1, it is characterized in that: described input rectifying unit is made up of rectifier bridge D1, input filter unit is made up of electric capacity C1, resistance R1.
3. a kind of excitation power supply for electromagnetically operated valve according to claim 1, it is characterized in that: described output afterflow unit is made up of afterflow diode D4, energy storage inductor L1 and storage capacitor C2, and output filtering unit is made up of common mode inductance L2 and filter capacitor C3.
4. a kind of excitation power supply for electromagnetically operated valve according to claim 1, it is characterized in that: described Auxiliary Power Units is made up of transformer T1, rectifier bridge D2, filter capacitor C4, filter capacitor C5 and pressurizer U1, Auxiliary Power Units is that PWM control unit is powered.
5. a kind of excitation power supply for electromagnetically operated valve according to claim 1; it is characterized in that: described PWM control unit is made up of pwm chip U3; square-wave signal driving switch pipe Q1 conducting and cut-off is exported by PWM control unit; make switching tube Q1 be operated on off state, PWM control unit also can realize excess current protective function.
6. a kind of excitation power supply for electromagnetically operated valve according to claim 1, it is characterized in that: described time delay regulator control block is made up of resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C9, diode D6, benchmark 431 and photoelectrical coupler U4, wherein, resistance R7 and electric capacity C9 forms delay circuit, 5V voltage is that electric capacity C9 charges through resistance R7, when the voltage at electric capacity C9 two ends is higher than 2.5V, benchmark U2 overturns, photoelectrical coupler U4 conducting, by resistance R18, resistance R19 short circuit, output voltage reduces, for electromagnetically operated valve provides normal operational voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520712688.6U CN204886701U (en) | 2015-09-14 | 2015-09-14 | A excitation power supply for solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520712688.6U CN204886701U (en) | 2015-09-14 | 2015-09-14 | A excitation power supply for solenoid valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886701U true CN204886701U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520712688.6U Active CN204886701U (en) | 2015-09-14 | 2015-09-14 | A excitation power supply for solenoid valve |
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| CN (1) | CN204886701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471290A (en) * | 2015-12-29 | 2016-04-06 | 隆鑫通用动力股份有限公司 | Variable voltage rectifier of diesel engine |
| CN106771492A (en) * | 2016-12-27 | 2017-05-31 | 重庆智神科技有限公司 | A kind of AC wave shape generation device |
-
2015
- 2015-09-14 CN CN201520712688.6U patent/CN204886701U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471290A (en) * | 2015-12-29 | 2016-04-06 | 隆鑫通用动力股份有限公司 | Variable voltage rectifier of diesel engine |
| CN106771492A (en) * | 2016-12-27 | 2017-05-31 | 重庆智神科技有限公司 | A kind of AC wave shape generation device |
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