CN105939119A - Power supply circuit of electric sewing machine - Google Patents
Power supply circuit of electric sewing machine Download PDFInfo
- Publication number
- CN105939119A CN105939119A CN201610522250.0A CN201610522250A CN105939119A CN 105939119 A CN105939119 A CN 105939119A CN 201610522250 A CN201610522250 A CN 201610522250A CN 105939119 A CN105939119 A CN 105939119A
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- Prior art keywords
- circuit
- coupled
- outfan
- input
- power
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a power supply circuit of an electric sewing machine. The power supply circuit comprises a rectifying circuit and a switch power supply circuit, wherein the rectifying circuit has an input end and an output end; the input end is coupled to an external mains supply while the output end outputs a direct current power supply; the switch power supply circuit has an input end and an output end; and the input end is coupled to the output end of the rectifying circuit so as to modulate the direct current power supply at the output end of the rectifying circuit and then to output a low voltage power supply. According to the power supply circuit of the electric sewing machine, the alternating current of the external mains supply can be converted into direct current effectively due to the rectifying circuit; and meanwhile, due to the switch power supply circuit, an effect of carrying out voltage drop processing on the direct current and then outputting the processed direct current to the each chip of the drive so as to supply power to each chip can be effectively realized.
Description
Technical field
The present invention relates to a kind of electric sewer, a kind of electric sewer power circuit.
Background technology
Sewing machine application very extensive in weaving and clothes field, sewing clothes when, occupies
Highly important status, by the use of sewing machine, can be greatly promoted the sewing efficiency of clothes, promote work
Task efficiency, the most also the darning work for family saves the substantial amounts of time.
Existing sewing machine mainly divides foot-propelled and electronic two kinds, foot-propelled by arranging a foot-propelled pedal below,
Then the side at foot-propelled pedal arranges a runner, and foot-propelled pedal drives runner by linkage, then
Runner is taken turns with the rotation on sewing machine and is connected by belt, is achieved in people and rides the effect driving sewing machine,
Can be very big but foot-propelled sewing machine one carrys out volume, two come in use between long after, the foot of people will be the most tired,
So compared to electric sewer, foot-propelled wants difficult many, and existing electric sewer is only merely former
The foot-propelled lead agency come is revised as driven by motor, although the volume so avoiding foot-propelled sewing machine is big and foot
Tired problem, existing electric sewer is in order to power well to driver and motor, it is necessary to set
Put a power circuit to be powered, and existing power circuit is to be converted into by outside mains electricity
Unidirectional current, by unidirectional current drive motor, will after unidirectional current being carried out blood pressure lowering by reduction voltage circuit the most again
Each chip being transported in driver, to drive motor preferably to operate, and the fall of existing employing
Volt circuit mode multiple resistance of connecting on DC circuit realizes, so in the process of blood pressure lowering
Middle resistance will consume substantial amounts of power, thus can cause the increase of the power consumption of electric sewer, increases
The use cost of electric sewer.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to provide one and can avoid electronic sewing
The electric sewer power circuit of the increase of the power consumption of machine.
For achieving the above object, the technical scheme is that a kind of electric sewer power circuit, bag
Include:
Rectification circuit, this rectification circuit has input and outfan, and its input is coupled to outside mains supply,
Outfan output DC source；
Switching power circuit, this switching power circuit has input and outfan, and its input is coupled to rectified current
The outfan on road, to export low-tension supply after being modulated by the DC source of rectification circuit output end.
As a further improvement on the present invention, described rectification circuit includes rectifier bridge chip and filter circuit, described whole
Stream bridge chip has input and outfan, and its input is coupled to outside civil power, and outfan is coupled to filtering
Export after circuit, between its outfan and filter circuit, be coupled with anti-impact circuit, described anti-impact circuit electricity
Road includes:
One end of surge resistance RT1, described surge resistance RT1 is coupled to the outfan of rectifier bridge chip, separately
One end is coupled to filter circuit；
Short circuit current, this short circuit current is in parallel with surge resistance RT1, by erosion control after the output of rectifier bridge chip is stable
Hit resistance RT1 short circuit.
As a further improvement on the present invention, described short circuit current includes:
Short-circuit relay, this short-circuit relay has switch sections and electromagnet portion, described switch sections and protecting against shock
Resistance RT1 is in parallel, and electromagnet portion controls opening and disconnected of switch sections；
Drive circuit, this drive circuit is coupled to short-circuit relay, in order to provide to the electromagnet portion of short-circuit relay
Actuating signal, described drive circuit includes:
Switch triode Q1, the base stage of this switch triode Q1 is coupled to the control core of driver after being coupled with resistance
Sheet, grounded emitter, emitter stage is coupled to base stage after being also coupled to resistance, colelctor electrode is coupled to short circuit relay
It is coupled to power supply after the electromagnet portion of device.
As a further improvement on the present invention, the model of described rectifier bridge chip is BRIDGE-B, surge resistance
The resistance of RT1 is 510 Ω/3W, and the model of short-circuit relay (a311) is G5LA-1A-DC12V, switch
The model of audion Q1 is 8050.
As a further improvement on the present invention, described switching power circuit includes PWM chip, mains transformer and anti-
Current feed circuit, described mains transformer has input and outfan, and its input is coupled to external power source, defeated
Going out end output DC source, described mains transformer and feedback circuit all couple with PWM chip, described feedback
Circuit includes:
Reference voltage circuit, this reference voltage circuit has input and outfan, described reference voltage circuit defeated
Enter and hold the outfan being coupled to mains transformer, outfan output reference voltage, described reference voltage circuit
Outfan is coupled to the outfan of mains transformer；
Isolation circuit, this isolation circuit has input and outfan, and the input of described isolation circuit is coupled to base
The outfan of quasi-potential circuit, the outfan of described isolation circuit is coupled to PWM chip.
As a further improvement on the present invention, described reference voltage circuit includes:
Stabilivolt A1, this stabilivolt A1 have the first end, the second end and control end, and described first end is coupled to isolation
The input of circuit, and it is coupled to the outfan of mains transformer after being also coupled to resistance, the second end ground connection,
Control to be coupled to after end is coupled with resistance the outfan of mains transformer, be also coupled to ground connection after resistance, and gone back
It is coupled to the first end after being coupled with a parallel with one another resistance and an electric capacity.
As a further improvement on the present invention, described isolation circuit includes:
Power circuit, this power circuit is coupled between PWM chip and the outfan of mains transformer with to PWM
Chip power supply；
Light coupling relay U2, this light coupling relay U2 has input and outfan, described light coupling relay U2 defeated
Entering end and be coupled to the outfan of reference voltage circuit, outfan is coupled to PWM chip, and wherein, outfan is also
It is coupled to power circuit.
As a further improvement on the present invention, described power circuit includes:
The anode of diode D7, this diode D7 is coupled to the outfan of mains transformer, and negative electrode is coupled to PWM
Chip；Wherein, the outfan of light coupling relay U2 it is coupled to after negative electrode is also coupled to resistance；
Filter circuit 2, this filter circuit 2 includes filter capacitor C26 and filter capacitor C24, described filter capacitor C26
Parallel with one another with filter capacitor C24, and be connected in parallel between negative electrode and the PWM chip of diode D7.
As a further improvement on the present invention, described PWM chip be model be the power supply chip of VIPER12, this electricity
Source chip has output pin, power pins and feedback pin, and described power pins is coupled to diode D7's
Negative electrode, output pin is coupled to the input of mains transformer, and feedback pin is coupled to light coupling relay U2
Outfan, the model of described mains transformer is EE16, and the model of described stabilivolt A1 is TL431, described
The model of light coupling relay U2 is EL357C, and the model of described diode D7 is LL4148, filter capacitor C26
Being 104 ceramic disc capacitors, the capacity of filter capacitor C24 is 22uF/50V.
Beneficial effects of the present invention, by the setting of rectification circuit, it is possible to effective defeated by its input
Enter outside mains supply, export DC source after being then passed through rectification, and pass through setting of switching power circuit
Put, it is possible to output after the effective DC source blood pressure lowering realizing exporting rectification circuit, due to switch electricity
The operation principle of source circuit is to achieve by power is equal, thus with here can be with the fall of maximum efficiency
Low-power consumption, reduces the use cost of electric sewer.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the rectification circuit of the present invention；
Fig. 2 is the circuit diagram of the switching power circuit of the present invention.
Detailed description of the invention
Below in conjunction with the embodiment given by accompanying drawing, the present invention is described in further detail.
Referring to figs. 1 through shown in 2, a kind of electric sewer power circuit of the present embodiment, including:
Rectification circuit a, this rectification circuit a have input and outfan, and its input is coupled to outside mains supply,
Outfan output DC source；
Switching power circuit b, this switching power circuit b have input and outfan, and its input is coupled to rectification
The outfan of circuit a, to export low-tension supply, at power supply after being modulated by the DC source of rectification circuit a outfan
During circuit work, the alternating current of outside civil power first passes through the input of rectification circuit a and enters into rectification
In circuit a, through the setting of rectification circuit a, it is possible to the AC rectification of civil power is become unidirectional current, the most directly
Stream electricity exports from outfan.
As a kind of detailed description of the invention improved, described rectification circuit a includes rectifier bridge chip a1 and filter circuit
A2, described rectifier bridge chip a1 have input and outfan, and its input is coupled to outside civil power, output
End exports after being coupled to filter circuit a2, is coupled with anti-impact circuit between its outfan and filter circuit a2
A3, described anti-impact circuit a3 circuit includes:
One end of surge resistance RT1, described surge resistance RT1 is coupled to the outfan of rectifier bridge chip a1,
The other end is coupled to filter circuit a2；
Short circuit current a31, this short circuit current a31 is in parallel with surge resistance RT1, when rectifier bridge chip a1 output is stable
After by surge resistance RT1 short circuit, in the work process of DC power supply circuit, the alternating current of outside civil power
Will flow in the input of rectifier bridge chip a1, by rectifier bridge chip a1, alternating current is converted into direct current
Electric current exports high-voltage direct current from the outfan of rectifier bridge chip a1, and then DC current is flowed into filtered electrical
In the a2 of road, after filtering after circuit a2 filter action, the most effectively stablize the power supply output of rectifier bridge chip a1
, DC power supply circuit work during, rectifier bridge chip a1 at the beginning when, its outfan is just
Dash current can occur, and dash current will pass through surge resistance RT1, surge resistance RT1 will be carried out
The effect of one buffering, the most just can effectively avoid the series of problems that dash current causes, and pass through
The setting of short circuit current a31, it is possible to the effective dash current at rectifier bridge chip a1 is stably later by erosion control
Hit resistance RT1 to be shorted out, so just can effectively avoid damage after the working long hours of surge resistance RT1
Bad problem, it also avoid the lifting of power consumption simultaneously.
As a kind of detailed description of the invention improved, described short circuit current a31 includes:
Short-circuit relay a311, this short-circuit relay a311 have switch sections and electromagnet portion, described switch sections
In parallel with surge resistance RT1, electromagnet portion controls opening and disconnected of switch sections；
Drive circuit a312, this drive circuit a312 are coupled to short-circuit relay a311, in order to short-circuit relay a311
Electromagnet portion provide actuating signal, described drive circuit a312 includes:
Switch triode Q1, the base stage of this switch triode Q1 is coupled to the control core of driver after being coupled with resistance
Sheet, grounded emitter, emitter stage is coupled to base stage after being also coupled to resistance, colelctor electrode is coupled to short circuit relay
It is coupled to power supply, by the setting of short-circuit relay a311, it is possible to realize one after the electromagnet portion of device a311
The effect of the big electric current of Small current control, the mating reaction thereby through drive circuit a312 just can realize driving
Whether the control chip control short-circuit relay a311 of device is by the effect of surge resistance RT1 short circuit, due to one
As the driving voltage of relay the highest, and the signal voltage of control chip output is not enough to drive relay,
Setting thereby through switch triode Q1, it is possible to the output signal enhancing effectively realizing control chip is driven
The effect of motor type relay.
As a kind of detailed description of the invention improved, the model of described rectifier bridge chip a1 is BRIDGE-B, protecting against shock
The resistance of resistance RT1 is 510 Ω/3W, and the model of short-circuit relay a311 is G5LA-1A-DC12V, switch
The model of audion Q1 is 8050, and BRIDGE-B chip has good rectification characteristic, and it is primarily directed to
Rectification is carried out in mains supply 220V, thus with the most just realizing the effect of rectification,
The relay of G5LA-1A-DC12V, utilizes 12V power supply just can effectively drive, so avoids the need for volume
Outer arranging a power circuit to drive it, 8050 audions are the most common audions, are used in
Used here as convenient and with low cost, the resistance of surge resistance RT1 is that 510 Ω/3W just can well be real
The effect of an existing protecting against shock, and power consumption is little.
As a kind of detailed description of the invention improved, described switching power circuit b includes that PWM chip b1, power supply become
Depressor b2 and feedback circuit b3, described mains transformer b2 have input and outfan, its input coupling
Be connected to external power source, outfan output DC source, described mains transformer b2 and feedback circuit b3 all with
PWM chip b1 couples, and described feedback circuit b3 includes:
Reference voltage circuit b31, this reference voltage circuit b31 have input and outfan, described reference voltage electricity
The input of road b31 is coupled to the outfan of mains transformer b2, outfan output reference voltage, described base
The outfan of quasi-potential circuit b31 is coupled to the outfan of mains transformer b2；
Isolation circuit b32, this isolation circuit b32 have input and outfan, the input of described isolation circuit b32
Being coupled to the outfan of reference voltage circuit b31, the outfan of described isolation circuit b32 is coupled to PWM chip
B1, by PWM chip b1 and the mating reaction of mains transformer b2, it is possible to effectively realize external electrical
Source is converted into galvanic current source and outputs, and setting by the reference voltage circuit b31 of feedback circuit b3
Put, it is possible to effectively achieve an effect carrying out contrasting with supply voltage, the most just can be good at
Judge now whether supply voltage is in abnormality, thus just it can be avoided that supply voltage is in normal variation
Lower feedback circuit b3 feeds back to PWM chip b1 and makes PWM chip b1 the problem that mistuning is whole occur, passes through simultaneously
The setting of isolation circuit b32, reference voltage circuit b31 judges as supply voltage abnormality when,
Feedback signal will send from reference voltage circuit b31, then in isolation circuit b32, through isolation
The buffer action of circuit b32, has filtered the electrical Interference signal in signal, this makes it possible to preferably feed back to
PWM chip b1.
As a kind of detailed description of the invention improved, described reference voltage circuit b31 includes:
Stabilivolt A1, this stabilivolt A1 have the first end, the second end and control end, and described first end is coupled to isolation
The input of circuit b32, and it is coupled to the outfan of mains transformer b2 after being also coupled to resistance, the second termination
Ground, controls to be coupled to after end is coupled with resistance the outfan of mains transformer b2, has been also coupled to ground connection after resistance,
And it is coupled to the first end, by stabilivolt A1's after being also coupled to a parallel with one another resistance and an electric capacity
Arrange, it is possible to a reference voltage is effectively provided out, and the stabilivolt A1 used in the present embodiment is
TL431, so by arrangement above, an amplitude discriminator will be constituted, the effective voltage magnitude identified now
The most normal.
As a kind of detailed description of the invention improved, described isolation circuit b32 includes:
Power circuit b321, this power circuit b321 are coupled to PWM chip b1 and the output of mains transformer b2
To power to PWM chip b1 between end；
Light coupling relay U2, this light coupling relay U2 has input and outfan, described light coupling relay U2 defeated
Entering end and be coupled to the outfan of reference voltage circuit b31, outfan is coupled to PWM chip b1, wherein, and output
End is further coupled to power circuit b321, by the setting of power circuit b321, it is possible to effective to PWM core
Sheet b1 powers, and by the setting of light coupling relay U2, it is possible to effectively realize a Phototube Coupling
Effect, owing to needing a reference value in light coupling relay U2 work process, just may be used thereby through arrangement above
To be effectively supplied to mono-reference value of light coupling relay U2 by supply voltage.
As a kind of detailed description of the invention improved, described power circuit b321 includes:
The anode of diode D7, this diode D7 is coupled to the outfan of mains transformer b2, and negative electrode is coupled to
PWM chip b1；Wherein, the outfan of light coupling relay U2 it is coupled to after negative electrode is also coupled to resistance；
Filter circuit b3211, this filter circuit b3211 include filter capacitor C26 and filter capacitor C24, described filtering
Electric capacity C26 and filter capacitor C24 is parallel with one another, and be connected in parallel on the negative electrode of diode D7 and PWM chip b1 it
Between, by the filter capacitor C26 in filter circuit b3211 and the setting of filter capacitor C24, it is possible to effective
The power supply being input to PWM chip b1 is carried out a filter action so that power supply can be preferably PWM core
Sheet b1 powers.
As improve a kind of detailed description of the invention, described PWM chip b1 be model be the power supply chip of VIPER12,
This power supply chip has output pin, power pins and feedback pin, and described power pins is coupled to diode
The negative electrode of D7, output pin is coupled to the input of mains transformer b2, and feedback pin is coupled to optocoupler relay
The outfan of device U2, the model of described mains transformer b2 is EE16, and the model of described stabilivolt A1 is
TL431, the model of described light coupling relay U2 is EL357C, and the model of described diode D7 is LL4148,
Filter capacitor C26 is 104 ceramic disc capacitors, and the capacity of filter capacitor C24 is 22uF/50V, VIPER12PWM
It is fast that chip b1 has response speed, and the effect of peripheral circuit simple in construction, the power consumption of itself is the most suitable simultaneously
Low, thus with here effectively reducing the power consumption of whole switching power circuit, by its reaction speed
The voltage that degree realizes Switching Power Supply output soon is the most stable, and the mains transformer of EE16 is to utilize power equal
Principle carry out the transformator of transformation, compact, thus with here on the one hand realizing transformation effect,
On the other hand can reduce the volume of whole Switching Power Supply, TL431 stabilivolt is controlled stabilivolt, its low cost
Honest and clean, compact, achieving the effect of voltage stabilizing output at the same time it can also be avoid the volume of power circuit to increase
Greatly, and being 104 ceramic disc capacitors by filter capacitor C26, the capacity of filter capacitor C24 is 22uF/50V, it is possible to
Well realize the filter action of 15V so that it is power preferably to PWM chip b1.
In sum, the electric sewer power circuit of the present invention, by the setting of rectification circuit a, it is possible to
Effectively the alternating current of outside mains supply is converted into unidirectional current, and passes through setting of switching power circuit b
Put, it is possible to the unidirectional current of high pressure is converted into the unidirectional current of low pressure, owing to the work of switching power circuit b is former
Reason is mainly realized by power-balance, thus with here can farthest reduce conversion consumption,
Decrease the power consumption caused in prior art due to blood pressure lowering.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to
Stating embodiment, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.Should refer to
Go out, for those skilled in the art, without departing from the principles of the present invention some
Improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. an electric sewer power circuit, it is characterised in that: including:
Rectification circuit (a), this rectification circuit (a) has input and outfan, and its input is coupled to outside city
Electricity power supply, outfan output DC source；
Switching power circuit (b), this switching power circuit (b) has input and outfan, and its input couples
In the outfan of rectification circuit (a), low to export after the DC source of rectification circuit (a) outfan is modulated
Voltage source.
Electric sewer power circuit the most according to claim 1, it is characterised in that: described rectification circuit (a)
Including rectifier bridge chip (a1) and filter circuit (a2), described rectifier bridge chip (a1) have input and
Outfan, its input is coupled to outside civil power, and outfan is coupled to filter circuit (a2) and exports afterwards, its
Anti-impact circuit (a3), described anti-impact circuit (a3) it is coupled with between outfan and filter circuit (a2)
Circuit includes:
One end of surge resistance RT1, described surge resistance RT1 is coupled to the output of rectifier bridge chip (a1)
End, the other end is coupled to filter circuit (a2)；
Short circuit current (a31), this short circuit current (a31) is in parallel with surge resistance RT1, as rectifier bridge chip (a1)
By surge resistance RT1 short circuit after output is stable.
Electric sewer power circuit the most according to claim 2, it is characterised in that: described short circuit current (a31)
Including:
Short-circuit relay (a311), this short-circuit relay (a311) has switch sections and electromagnet portion, described in open
Closing part in parallel with surge resistance RT1, electromagnet portion controls opening and disconnected of switch sections；
Drive circuit (a312), this drive circuit (a312) is coupled to short-circuit relay (a311), in order to give short circuit
The electromagnet portion of relay (a311) provides actuating signal,
Described drive circuit (a312) including:
Switch triode Q1, the base stage of this switch triode Q1 is coupled to the control core of driver after being coupled with resistance
Sheet, grounded emitter, emitter stage is coupled to base stage after being also coupled to resistance, colelctor electrode is coupled to short circuit relay
It is coupled to power supply after the electromagnet portion of device (a311).
Electric sewer power circuit the most according to claim 3, it is characterised in that: described rectifier bridge chip
(a1) model is BRIDGE-B, and the resistance of surge resistance RT1 is 510 Ω/3W, short-circuit relay
(a311) model is G5LA-1A-DC12V, and the model of switch triode Q1 is 8050.
5. according to the electric sewer power circuit described in claim 1 or 2 or 3 or 4, it is characterised in that: institute
State switching power circuit (b) and include PWM chip (b1), mains transformer (b2) and feedback circuit (b3),
Described mains transformer (b2) has input and outfan, and its input is coupled to external power source, output
End output DC source, described mains transformer (b2) and feedback circuit (b3) all with PWM chip (b1)
Coupling, described feedback circuit (b3) including:
Reference voltage circuit (b31), this reference voltage circuit (b31) has input and outfan, described benchmark
The input of potential circuit (b31) is coupled to the outfan of mains transformer (b2), outfan output reference
Voltage, the outfan of described reference voltage circuit (b31) is coupled to the outfan of mains transformer (b2)；
Isolation circuit (b32), this isolation circuit (b32) has input and outfan, described isolation circuit (b32)
Input be coupled to the outfan of reference voltage circuit (b31), the output of described isolation circuit (b32)
End is coupled to PWM chip (b1).
Electric sewer power circuit the most according to claim 5, it is characterised in that: described reference voltage electricity
(b31) including on road:
Stabilivolt A1, this stabilivolt A1 have the first end, the second end and control end, described first end be coupled to every
From the input of circuit (b32), and it is coupled to the outfan of mains transformer (b2) after being also coupled to resistance,
Second end ground connection, controls to be coupled to after end is coupled with resistance the outfan of mains transformer (b2), is also coupled to
Ground connection after the resistance having resistance to be 2K, and it is also coupled to the resistance and one that a resistance is 2K being serially connected
Individual capacitance be 104 electric capacity after be coupled to the first end.
Electric sewer power circuit the most according to claim 5, it is characterised in that: described isolation circuit (b32)
Including:
Power circuit (b321), this power circuit (b321) is coupled to PWM chip (b1) and mains transformer
(b2) to power to PWM chip (b1) between outfan；
Light coupling relay U2, this light coupling relay U2 has input and outfan, described light coupling relay U2
Input be coupled to the outfan of reference voltage circuit (b31), outfan is coupled to PWM chip (b1),
Wherein, outfan is further coupled to power circuit (b321).
Electric sewer power circuit the most according to claim 6, it is characterised in that: described isolation circuit (b32)
Including:
Power circuit (b321), this power circuit (b321) is coupled to PWM chip (b1) and mains transformer
(b2) to power to PWM chip (b1) between outfan；
Light coupling relay U2, this light coupling relay U2 has input and outfan, described light coupling relay U2
Input be coupled to the outfan of reference voltage circuit (b31), outfan is coupled to PWM chip (b1),
Wherein, outfan is further coupled to power circuit (b321).
Electric sewer power circuit the most according to claim 8, it is characterised in that: described power circuit
(b321) including:
The anode of diode D7, this diode D7 is coupled to the outfan of mains transformer (b2), and negative electrode couples
In PWM chip (b1)；Wherein, the output of light coupling relay U2 it is coupled to after negative electrode is also coupled to resistance
End；
Filter circuit (b3211), this filter circuit (b3211) includes filter capacitor C26 and filter capacitor C24,
Described filter capacitor C26 and filter capacitor C24 is parallel with one another, and is connected in parallel on negative electrode and the PWM of diode D7
Between chip (b1).
Electric sewer power circuit the most according to claim 9, it is characterised in that: described PWM chip
(b1) be model be the power supply chip of VIPER12, this power supply chip have output pin, power pins and
Feedback pin, described power pins is coupled to the negative electrode of diode D7, and output pin is coupled to mains transformer
(b2) input, feedback pin is coupled to the outfan of light coupling relay U2, described mains transformer (b2)
Model be EE16, the model of described stabilivolt A1 is TL431, and the model of described light coupling relay U2 is
EL357C, the model of described diode D7 is LL4148, and filter capacitor C26 is 104 ceramic disc capacitors, filter
The capacity of ripple electric capacity C24 is 22uF/50V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522250.0A CN105939119A (en) | 2016-07-01 | 2016-07-01 | Power supply circuit of electric sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522250.0A CN105939119A (en) | 2016-07-01 | 2016-07-01 | Power supply circuit of electric sewing machine |
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| CN105939119A true CN105939119A (en) | 2016-09-14 |
Family
ID=56872443
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|---|---|---|---|
| CN201610522250.0A Pending CN105939119A (en) | 2016-07-01 | 2016-07-01 | Power supply circuit of electric sewing machine |
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Cited By (1)
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Address after: 325000 Zhejiang city of Wenzhou province Luo Wenzhou economic and Technological Development Zone, Road No. 150 four floor Applicant after: Zhejiang Yida Technology Co., Ltd. Address before: 302, building 325000, building three, building 2, zone 10, hi tech Industrial Park, Wenzhou, Zhejiang, Applicant before: WENZHOU YESTAR SCIENCE & TECHNOLOGY CO., LTD. |
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