CN110277925A - The power circuit of temperature control waistband - Google Patents
The power circuit of temperature control waistband Download PDFInfo
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- CN110277925A CN110277925A CN201910593829.XA CN201910593829A CN110277925A CN 110277925 A CN110277925 A CN 110277925A CN 201910593829 A CN201910593829 A CN 201910593829A CN 110277925 A CN110277925 A CN 110277925A
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- 238000004804 winding Methods 0.000 claims description 112
- 239000003990 capacitor Substances 0.000 claims description 58
- 230000005669 field effect Effects 0.000 claims description 53
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- 101100233223 Arabidopsis thaliana IOS1 gene Proteins 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 claims description 2
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000005622 photoelectricity Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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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
- H02M1/08—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
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/79—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
Abstract
A kind of power circuit of temperature control waistband, including the DC power supply circuit being all connected with firewire L and zero curve N and firewire L and zero curve the N AC power circuit being all connected with and the control chip being all connected with DC power supply circuit, AC power circuit.AC power source, the comprehensive utilization ratio of the electronic component height, the firewire by the direct current of output with completely isolated, the remote controlled alternating current of alternating current, raising safety of DC power supply and predetermined voltage can be so provided simultaneously.
Description
Technical field
The present invention relates to temperature controlled bed technical field, especially a kind of power circuit of temperature control waistband.
Background technique
Temperature control waistband has multiple loads, is such as located at the liquid crystal screen controller outside temperature control waistband, is located in temperature control waistband
Heating wire, the overlength wave producer in portion etc., wherein the liquid crystal display of liquid crystal screen controller and heating wire need 24V direct current to be driven
Dynamic, overlength wave producer needs 24V exchange to be driven, and the control chip in liquid crystal screen controller needs 5V direct current to be driven
It is dynamic.Existing temperature control waistband needs multiple power supply devices, and external communication electricity is converted to the power supply that each load needs respectively, is needed
More electronic device is wanted, is made a low multiple use.In addition, existing for exporting the AC portion of the power supply device of DC power supply
Can't be mutually isolated with direct current component, there are the possibility of breakdown, safety is lower.The firewire of existing power supply device is opened simultaneously
It closes and uses direct physical switch, need closely to be manipulated, since physical switch is close to the alternating current of 220V, for
For operator, safety is lower.
Summary of the invention
In view of this, the present invention provides a kind of for providing AC power source, the electricity of DC power supply and predetermined voltage simultaneously
The comprehensive utilization ratio of subassembly is high, by the firewire of the direct current of output and completely isolated, the remote controlled alternating current of alternating current, mention
The power circuit of the temperature control waistband of high security, to solve the above problems.
A kind of power circuit of temperature control waistband, including include the DC power supply circuit being all connected with firewire L and zero curve N, with
The AC power circuit that firewire L and zero curve N are all connected with and the control core being all connected with DC power supply circuit, AC power circuit
Piece；DC power supply circuit includes the first electronic switching circuit connecting with firewire L, equal with the first electronic switching circuit and zero curve N
The rectifier bridge of connection, is connected to rectification at the filter capacitor C1 being connected between the first output end and second output terminal of rectifier bridge
First output end of start triggering circuit and rectifier bridge between the first output end and second output terminal of bridge, second output terminal
And the half bridge converter that start triggering circuit is all connected with, and the first output end and second output terminal with half bridge converter
Magnetic core the isolated buck transformer TR1, magnetic core isolated buck transformer TR1 being all connected with have the first input winding, the first output
Winding and across first input winding and first output winding magnetic core, first input winding both ends respectively with half-bridge converter
The first output end and second output terminal of device connect, and the first end of the first output winding is as the first output end of direct current, second end
As direct current second output terminal；AC power circuit includes the second electronic switching circuit connecting with firewire L and the second electronic cutting
Iron core the step-down transformer TR2, iron core step-down transformer TR2 that powered-down road and zero curve N are all connected with have the second input winding, second
Export winding and across the second input winding and the iron core of the second output winding；The first end and the second electronics of second input winding
Switching circuit connection, second end are connect with zero curve N, and for the first end of the second output winding as exchange cathode output end, second is defeated
The second end of winding is as exchange cathode output end out.
Further, first electronic switching circuit include the first controllable silicon SCR 1, resistance R1, resistance R2, resistance R3,
Control chip, the first photoelectrical coupler IOS1 and the first fuse FU1；The input terminal of first controllable silicon SCR 1 is connect with firewire L,
Output end is connect with the first end of the first fuse FU1, and control terminal is connect by resistance R1 with input terminal, and control terminal is also with first
The first output end of photoelectrical coupler IOS1 connects, and the second output terminal of the first photoelectrical coupler IOS1 passes through resistance R2 and first
The output end of controllable silicon SCR 1 connects；The power end of first photoelectrical coupler IOS1 is connected by a resistance R3 and DC power supply VCC
It connects, control terminal is connect with the first signal output end of control chip, and the power end for controlling chip is connect with DC power supply VCC.
Further, the start triggering circuit include the 5th diode D5, the 6th diode D6, the 7th diode D7,
Capacitor C2, capacitor C3, resistance R4 and bidirectional trigger diode DB；The anode of 5th diode D5 and the second output terminal of rectifier bridge
Connection, cathode are connect with the anode of the 6th diode D6；The cathode of 6th diode D6 and the first output end of rectifier bridge connect；
The cathode of 7th diode D7 is connect with the 5th diode D5 cathode, and anode is connected by the second output terminal of capacitor C3 and rectifier bridge
It connects, and is connected by the first output end of resistance R4 and rectifier bridge；Capacitor C2 is connected to the both ends of resistance R4；Two-way two pole of triggering
The first end of pipe DB is connect with the anode of the 7th diode D7.
Further, the half bridge converter include the first field-effect tube VT1, the second field-effect tube VT2, capacitor C4,
Capacitor C5, capacitor C6, capacitor C7, resistance R5, resistance R6, resistance R7, the 8th diode D8, the 9th diode D9, the first winding
L1, the second winding L2 and tertiary winding L3；The drain electrode of first field-effect tube VT1 and the first output end of rectifier bridge connect, source electrode
It is connect with the drain electrode of the second field-effect tube VT2, grid is connect by resistance R5 with the first end of the first winding L1；The of capacitor C4
One end is connect with the drain electrode of the first field-effect tube VT1, and second end is connect with the source electrode of the first field-effect tube VT1；First winding L1
Second end connect with the source electrode of the first field-effect tube VT1, while being connect with the anode of the 8th diode D8, the 8th diode D8
Cathode connect with the grid of the first field-effect tube VT1；The grid of second field-effect tube VT2 passes through resistance R6 and two-way triggering two
The second end of pole pipe DB connects, and source electrode is connect with the second output terminal of rectifier bridge 20；The first end of capacitor C5 and the second field-effect
The drain electrode of pipe VT2 connects, and second end is connect with the source electrode of the second field-effect tube VT2；The first end and rectifier bridge of tertiary winding L3
Second output terminal connection, second end connect by resistance R7 with the grid of the second field-effect tube VT2；The sun of 9th diode D9
The connection of the second output terminal of pole and rectifier bridge, cathode are connect with the grid of the second field-effect tube VT2；The first end of second winding L2
Be all connected with the source electrode of the first field-effect tube VT1 and the cathode of the 7th diode D7, second end as half bridge converter
One output end；The first end of capacitor C6 is connect with the drain electrode of the first field-effect tube VT1, and the first end of second end and capacitor C7 connect
It connects；The second end of capacitor C7 and the second output terminal of rectifier bridge connect；Node between capacitor C6 and capacitor C7 is as semibridge system
The second output terminal of converter.
Further, the first winding L1, the second winding L2 and tertiary winding L3 are wound on same magnetic core, are formed
One self-excited driving transformer.
Further, second electronic switching circuit includes the second controllable silicon SCR 2, resistance R8, resistance R9, resistance
R10, the second photoelectrical coupler IOS2 and the second fuse FU2, the input terminal of the second controllable silicon SCR 2 are connect with firewire L, output
End connect with the first end of the second fuse FU2, control terminal pass through resistance R8 connect with input terminal, control terminal also with the second photoelectricity
The first output end of coupler IOS2 connects, and the second output terminal of the second photoelectrical coupler IOS2 is controllable by resistance R9 and second
The output end of silicon SCR2 connects, and the power end of the second photoelectrical coupler IOS2 is connect by resistance R10 with DC power supply VCC, controls
End processed is connect with the second signal output end of control chip.
Further, the second end of the second fuse FU2 is connect with the first end of the second input winding, the second output
The first end of winding is connect with the input terminal of a relay RL, and the control terminal of relay RL and the third signal of control chip U1 are defeated
Outlet connection, the output end of relay RL is as exchange cathode output end.
Further, the iron core step-down transformer TR2 second output winding middle part also draws there are two centre it is defeated
Outlet, two intermediate outputs are connect with the output end of a rectifier, the input terminal of the output end of rectifier and a voltage-stablizer
Two output ends of connection, voltage-stablizer are used as respectively as direct-flow positive pole output end and direct current cathode output end.
Further, the first end of the second input winding of the iron core step-down transformer TR2 is with the first fuse FU1's
Second end connection.
Compared with prior art, the power circuit of temperature control waistband of the invention include be all connected with firewire L and zero curve N it is straight
It is galvanic electricity source circuit, equal with firewire L and zero curve the N AC power circuit being all connected with and with DC power supply circuit, AC power circuit
The control chip of connection；DC power supply circuit includes the first electronic switching circuit connecting with firewire L, powered-down with the first electronic cutting
Rectifier bridge that road and zero curve N are all connected with, the filter capacitor C1 being connected between the first output end and second output terminal of rectifier bridge,
Be connected to start triggering circuit between the first output end and second output terminal of rectifier bridge, with the first output end of rectifier bridge,
The half bridge converter that second output terminal and start triggering circuit are all connected with, and with the first output end of half bridge converter and
The magnetic core isolated buck transformer TR1 that second output terminal is all connected with, magnetic core isolated buck transformer TR1 have the first input around
Group, the first output winding and the magnetic core that winding is exported across the first input winding and first, the both ends difference of the first input winding
It is connect with the first output end and second output terminal of half bridge converter, the first end of the first output winding is defeated as direct current first
Outlet, second end is as direct current second output terminal；AC power circuit include the second electronic switching circuit being connect with firewire L,
Iron core the step-down transformer TR2, iron core step-down transformer TR2 being all connected with the second electronic switching circuit and zero curve N have second
Input winding, the second output winding and across the second input winding and the iron core of the second output winding；The of second input winding
One end is connect with the second electronic switching circuit, and second end is connect with zero curve N, and the first end of the second output winding is as exchange anode
Output end, the second end of the second output winding is as exchange cathode output end.DC power supply can be so provided simultaneously and made a reservation for
AC power source, the comprehensive utilization ratio of electronic component of voltage be high, the direct current of output and alternating current is completely isolated, can remotely control
The firewire of alternating current processed improves safety.
Detailed description of the invention
The embodiment of the present invention is described below in conjunction with attached drawing, in which:
Fig. 1 is the circuit diagram of the power circuit of temperature control waistband provided by the invention.
Specific embodiment
Specific embodiments of the present invention are further elaborated below based on attached drawing.It should be understood that herein
The explanation of the embodiment of the present invention is not intended to limit the scope of protection of the present invention.
Referring to FIG. 1, the power circuit of temperature control waistband provided by the invention includes equal with external firewire L and external zero curve N
The DC power supply circuit 100 of connection, the AC power circuit 200 and and direct current being all connected with outside firewire L and outside zero curve N
The control chip U1 that source circuit 100, AC power circuit 200 are all connected with, DC power supply circuit 100 are used to turn external communication electricity
It is changed to DC output power, AC power circuit 200 is used to be converted to external communication electricity the exchange out-put supply of predetermined voltage.
DC power supply circuit 100 includes the first electronic switching circuit 10 connecting with outside firewire L and the first electronic switch
Rectifier bridge 20 that circuit 10 and outside zero curve N are all connected with, the filter capacitor C1 being connected between two output ends of rectifier bridge 20,
It is connected to the start triggering circuit 30 between two output ends of rectifier bridge 20, touched with two output ends of rectifier bridge 20 and starting
The half bridge converter 40 and drop is isolated with the magnetic core of two output ends of half bridge converter 40 connection that Power Generation Road 30 is all connected with
Pressure transformer TR1.Since the frequency of liquid crystal display and heating wire is higher, power is smaller, and magnetic core isolated buck transformer TR1 can be defeated
The power supply signal of high-frequency, low-power out.
First electronic switching circuit 10, which is realized, controls the remote switch of firewire L, and rectifier bridge 20 is for realizing rectification, filtering
Capacitor C1 is for filtering, and start triggering circuit 30 is for triggering half bridge converter 40, the field-effect in half bridge converter 40
The pressure resistance of pipe is lower, will not be more than the peak value of defeated people's voltage；The saturation voltage of field-effect tube also minimizes；Filter capacitor C1
Pressure resistance also can reduce.The voltage magnitude being applied on magnetic core isolated buck transformer TR1 only has the half of former input voltage.
First electronic switching circuit 10 includes the first controllable silicon SCR 1, resistance R1, resistance R2, resistance R3, the first photoelectricity coupling
Clutch IOS1 and the first fuse FU1.
The input terminal of first controllable silicon SCR 1 is connect with firewire L, and output end is connect with the first end of the first fuse FU1,
Control terminal is connect by resistance R1 with input terminal, and control terminal is also connect with the first output end of the first photoelectrical coupler IOS1, the
The second output terminal of one photoelectrical coupler IOS1 is connect by resistance R2 with the output end of the first controllable silicon SCR 1.
The power end of first photoelectrical coupler IOS1 is connect by resistance R3 with DC power supply VCC, control terminal and control core
The first signal output end of piece U1 connects, and the power end of control chip U1 is connect with DC power supply VCC.
In present embodiment, control chip U1 is single-chip microcontroller TSSOP20A.
Rectifier bridge 20 includes first diode D1, the second diode D2, third diode D3 and the 4th diode D4.First
The anode of diode D1 is connect with the second end of the first fuse FU1, cathode as rectifier bridge 20 the first output end and with
The cathode of four diode D4 connects；The cathode of second diode D2 is connect with the anode of first diode D1, and anode is as rectification
The second output terminal of bridge 20 is simultaneously connect with the anode of third diode D3；The cathode of third diode D3 and the 4th diode D4's
Anode connection, while being connect with zero curve N.
The first end of filter capacitor C1 is connect with the first output end of rectifier bridge 20, and the second of second end and rectifier bridge 20 is defeated
Outlet connection.
Start triggering circuit 30 includes the 5th diode D5, the 6th diode D6, the 7th diode D7, capacitor C2, capacitor
C3, resistance R4 and bidirectional trigger diode DB.
The anode of 5th diode D5 is connect with the second output terminal of rectifier bridge 20, the anode of cathode and the 6th diode D6
Connection, the cathode of the 6th diode D6 are connect with the first output end of rectifier bridge 20.
The cathode of 7th diode D7 is connect with the 5th diode D5 cathode, anode pass through capacitor C3 and rectifier bridge 20 the
The connection of two output ends, and connect by resistance R4 with the first output end of rectifier bridge 20, capacitor C2 is connected to the both ends of resistance R4.
The first end of bidirectional trigger diode DB is connect with the anode of the 7th diode D7.
Half bridge converter 40 includes the first field-effect tube VT1, the second field-effect tube VT2, capacitor C4, capacitor C5, capacitor
C6, capacitor C7, resistance R5, resistance R6, resistance R7, the 8th diode D8, the 9th diode D9, the first winding L1, the second winding
L2 and tertiary winding L3.
The drain electrode of first field-effect tube VT1 is connect with the first output end of rectifier bridge 20, source electrode and the second field-effect tube VT2
Drain electrode connection, grid connect by resistance R5 with the first end of the first winding L1.The first end of capacitor C4 and the first field-effect
The drain electrode of pipe VT1 connects, and second end is connect with the source electrode of the first field-effect tube VT1.The second end of first winding L1 with first
The source electrode of effect pipe VT1 connects, while connecting with the anode of the 8th diode D8, the cathode of the 8th diode D8 and first effect
Should pipe VT1 grid connection.
The grid of second field-effect tube VT2 is connect by resistance R6 with the second end of bidirectional trigger diode DB, source electrode and
The second output terminal of rectifier bridge 20 connects.The first end of capacitor C5 is connect with the drain electrode of the second field-effect tube VT2, second end and the
The source electrode of two field-effect tube VT2 connects.The first end of tertiary winding L3 is connect with the second output terminal of rectifier bridge 20, and second end is logical
It crosses resistance R7 to connect with the grid of the second field-effect tube VT2, the anode of the 9th diode D9 and the second output terminal of rectifier bridge 20
Connection, cathode are connect with the grid of the second field-effect tube VT2.
The first end of second winding L2 is all connected with the source electrode of the first field-effect tube VT1 and the cathode of the 7th diode D7,
First output end of the second end as half bridge converter 40.
The first end of capacitor C6 is connect with the drain electrode of the first field-effect tube VT1, and second end is connect with the first end of capacitor C7,
The second end of capacitor C7 is connect with the second output terminal of rectifier bridge 20.Node between capacitor C6 and capacitor C7 becomes as semibridge system
The second output terminal of parallel operation 40.
Magnetic core isolated buck transformer TR1 has the first input winding, the first output winding and passes through the first input winding
And first output winding magnetic core, first input winding both ends respectively with the first output end of half bridge converter 40 and second
The first end of output end connection, the first output winding is defeated as the direct current first of the power circuit of temperature control waistband provided by the invention
Outlet OUT1, direct current second output terminal OUT2 of the second end as the power circuit of temperature control waistband provided by the invention.Direct current
One output end OUT1 and direct current second output terminal OUT2 is used to drive the liquid crystal display and heating wire of temperature control waistband.
First winding L1, the second winding L2 and tertiary winding L3 are wound on same magnetic core, collectively constitute self-excitation drive
Dynamic transformer.Self-excited driving transformer has enough exciting currents to flow through, it is ensured that the first field-effect tube VT1, second effect
Should pipe VT2 being capable of normally switch motion.
The positive half-wave of alternating current passes through the delay of resistance R4, capacitor C3, the second field-effect tube VT2 conducting.Electric current is by capacitor
Node between C6, capacitor C7 passes through input winding, the second winding L2, the second field-effect of magnetic core isolated buck transformer TR1
Pipe VT2 forming circuit.Positive voltage under being born in induction on the second winding L2 at this time, the just lower electricity born in the first winding L1 induction
It presses, positive voltage under being born in tertiary winding L3 induction.This conducting to the first field-effect tube VT1 and the second field-effect tube VT2
Shutdown creates conditions.After the first field-effect tube VT1 conducting, electric current is by the first field-effect tube VT1 by the second winding L2, input
Winding flows to the node between capacitor C6, capacitor C7.First field-effect tube VT1, the second field-effect tube VT2 switching frequency be
The working frequency of the power circuit of temperature control waistband provided by the invention.
Similarly, the working principle of the negative half-wave of alternating current is similar.
AC power circuit 200 includes the second electronic switching circuit 210 connecting with outside firewire L and the second electronic cutting
Iron core step-down transformer TR2, relay RL, switch K1, rectifier 220 and the pressure stabilizing that powered-down road 210 and outside zero curve N are all connected with
Device 230.
Due to
Second electronic switching circuit 210 includes the second controllable silicon SCR 2, resistance R8, resistance R9, resistance R10, the second photoelectricity
Coupler IOS2 and the second fuse FU2.
The input terminal of second controllable silicon SCR 2 is connect with firewire L, and output end is connect with the first end of the second fuse FU2,
Control terminal is connect by resistance R8 with input terminal, and control terminal is also connect with the first output end of the second photoelectrical coupler IOS2, the
The second output terminal of two photoelectrical coupler IOS2 is connect by resistance R9 with the output end of the second controllable silicon SCR 2.
The power end of second photoelectrical coupler IOS2 is connect by resistance R10 with DC power supply VCC, control terminal and control core
The second signal output end of piece U1 connects.
Iron core step-down transformer TR2 has the second input winding, the second output winding and passes through the second input winding and the
The iron core of two output windings, the second end of the second fuse FU2 are connect with the first end of the second input winding, the second input winding
Second end connect with outside zero curve N, second output winding first end connect with the input terminal of relay RL, relay RL's
Output end is connected as exchange cathode output end AC+ and external communication load.
The second end of second output winding is connected as exchange cathode output end AC- and external communication load.Exchange anode
Output terminals A C+ and exchange cathode output end AC- is used to drive the overlength wave producer of temperature control waistband.
Since the working frequency of overlength wave producer is low, power is big, iron core step-down transformer TR2 can output low frequency rate,
High-power power supply signal.
The first end of the control loop of relay is connect by switch K1 with DC power supply VCC, the control terminal of switch K1 and
Control the third signal output end connection of chip U1, the second end ground connection of the control loop of relay.
Iron core step-down transformer TR2 second output winding middle part also draws there are two intermediate output, two centres
Output end is connect with the output end of rectifier 220, and the output end of rectifier 220 is connect with the input terminal of voltage-stablizer 230, pressure stabilizing
Two output ends of device 230 are used as defeated respectively as direct-flow positive pole output end DC+ and direct current cathode output end DC-, direct-flow positive pole
Outlet DC+ can be used as DC power supply VCC, direct current cathode output end DC- ground connection.Direct-flow positive pole output end DC+ and direct current cathode are defeated
Outlet DC- can be used for drive control chip U1 for providing 5V DC power supply.
The alternating current that rectifier 220 is used to export intermediate output rectifies, and voltage-stablizer 230 is used for rectifier
220 output carries out voltage adjusting and pressure stabilizing.
In other embodiments, the second electronic switching circuit 210 can also be cancelled, i.e. the second of iron core step-down transformer TR2
The first end of input winding is directly connect with the second end of the first fuse FU1, in this way, AC power circuit 200 and direct current
Source circuit 100 shares the first electronic switching circuit 10, can save electronic device, reduce cost.
Compared with prior art, the power circuit of temperature control waistband of the invention include be all connected with firewire L and zero curve N it is straight
Galvanic electricity source circuit 100, the AC power circuit 200 being all connected with firewire L and zero curve N and with DC power supply circuit 100, alternating current
The control chip U1 that source circuit 200 is all connected with；DC power supply circuit 100 includes the first electronic switching circuit connecting with firewire L
10, the rectifier bridge 20 that is all connected with the first electronic switching circuit 10 and zero curve N, the first output end for being connected to rectifier bridge 20 and the
Filter capacitor C1 between two output ends, the starting being connected between the first output end and second output terminal of rectifier bridge 20 triggering
The half bridge converter that the first output end, second output terminal and the start triggering circuit 30 of circuit 30 and rectifier bridge 20 are all connected with
40, and the magnetic core isolated buck transformer TR1 being all connected with the first output end and second output terminal of half bridge converter 40,
Magnetic core isolated buck transformer TR1 is defeated with the first input winding, the first output winding and across the first input winding and first
The both ends of the magnetic core of winding out, the first input winding connect with the first output end and second output terminal of half bridge converter 40 respectively
It connects, the first end of the first output winding is as the first output end of direct current, and second end is as direct current second output terminal；AC power source electricity
Road 200 includes the second electronic switching circuit 210 connecting with firewire L, is all connected with the second electronic switching circuit 210 and zero curve N
Iron core step-down transformer TR2 and relay RL, iron core step-down transformer TR2 have second input winding, second output winding
And across the second input winding and the iron core of the second output winding；The first end and the second electronic switching circuit of second input winding
210 connections, second end are connect with zero curve N, and the first end of the second output winding is connect with the input terminal of relay RL, relay RL
Output end as exchange cathode output end AC+；The control terminal of relay RL is connect with control chip U1；Second output winding
Second end is as exchange cathode output end AC-.AC power source, the electronics of DC power supply and predetermined voltage can be so provided simultaneously
Comprehensive utilization ratio height, the firewire by the direct current of output with completely isolated, the remote controlled alternating current of alternating current, raising of component
Safety.
The foregoing is merely a prefered embodiment of the invention, is not used to limitation protection scope of the present invention, any in the present invention
Modification, equivalent replacement or improvement in spirit etc., all cover in scope of the presently claimed invention.
Claims (9)
1. a kind of power circuit of temperature control waistband, it is characterised in that: including the DC power supply electricity being all connected with firewire L and zero curve N
Road and firewire L and zero curve the N AC power circuit being all connected with and the control being all connected with DC power supply circuit, AC power circuit
Coremaking piece；DC power supply circuit includes the first electronic switching circuit connecting with firewire L and the first electronic switching circuit and zero curve
Rectifier bridge that N is all connected with, the filter capacitor C1 being connected between the first output end and second output terminal of rectifier bridge, be connected to it is whole
It flows the start triggering circuit between the first output end and second output terminal of bridge, exported with the first output end of rectifier bridge, second
The half bridge converter that end and start triggering circuit are all connected with, and exported with the first output end of half bridge converter and second
Hold the magnetic core isolated buck transformer TR1 being all connected with, magnetic core isolated buck transformer TR1 that there is the first input winding, first defeated
Winding and the magnetic core for inputting winding and the first output winding across first, the both ends of the first input winding become with semibridge system respectively out
The first output end and second output terminal of parallel operation connect, and the first end of the first output winding is as the first output end of direct current, and second
End is used as direct current second output terminal；AC power circuit includes the second electronic switching circuit connecting with firewire L and the second electronics
The iron core step-down transformer TR2 that switching circuit and zero curve N are all connected with, iron core step-down transformer TR2 have the second input winding, the
Two output windings and the iron core that winding is exported across the second input winding and second；The first end of second input winding and the second electricity
Sub switch circuit connection, second end are connect with zero curve N, and the first end of the second output winding, which is used as, exchanges cathode output end, and second
The second end of winding is exported as exchange cathode output end.
2. the power circuit of temperature control waistband as described in claim 1, it is characterised in that: first electronic switching circuit includes
First controllable silicon SCR 1, resistance R1, resistance R2, resistance R3, control chip, the first photoelectrical coupler IOS1 and the first fuse
FU1；The input terminal of first controllable silicon SCR 1 is connect with firewire L, and output end is connect with the first end of the first fuse FU1, control
End is connect by resistance R1 with input terminal, and control terminal is also connect with the first output end of the first photoelectrical coupler IOS1, the first light
The second output terminal of electric coupler IOS1 is connect by resistance R2 with the output end of the first controllable silicon SCR 1；First photoelectrical coupler
The power end of IOS1 is connect by resistance R3 with a DC power supply VCC, and the first signal output end of control terminal and control chip connects
It connects, the power end for controlling chip is connect with DC power supply VCC.
3. the power circuit of temperature control waistband as described in claim 1, it is characterised in that: the start triggering circuit includes the 5th
Diode D5, the 6th diode D6, the 7th diode D7, capacitor C2, capacitor C3, resistance R4 and bidirectional trigger diode DB；The
The anode of five diode D5 and the second output terminal of rectifier bridge connect, and cathode is connect with the anode of the 6th diode D6；Six or two
The cathode of pole pipe D6 and the first output end of rectifier bridge connect；The cathode of 7th diode D7 and the 5th diode D5 cathode connect
It connects, anode is connected by the second output terminal of capacitor C3 and rectifier bridge, and is connected by the first output end of resistance R4 and rectifier bridge
It connects；Capacitor C2 is connected to the both ends of resistance R4；The first end of bidirectional trigger diode DB is connect with the anode of the 7th diode D7.
4. the power circuit of temperature control waistband as claimed in claim 3, it is characterised in that: the half bridge converter includes first
Field-effect tube VT1, the second field-effect tube VT2, capacitor C4, capacitor C5, capacitor C6, capacitor C7, resistance R5, resistance R6, resistance R7,
8th diode D8, the 9th diode D9, the first winding L1, the second winding L2 and tertiary winding L3；First field-effect tube VT1's
Drain electrode connect with the first output end of rectifier bridge, source electrode is connect with the drain electrode of the second field-effect tube VT2, grid pass through resistance R5 and
The first end of first winding L1 connects；The first end of capacitor C4 is connect with the drain electrode of the first field-effect tube VT1, second end and first
The source electrode of field-effect tube VT1 connects；The second end of first winding L1 is connect with the source electrode of the first field-effect tube VT1, while with
The anode of eight diode D8 connects, and the cathode of the 8th diode D8 is connect with the grid of the first field-effect tube VT1；Second field-effect
The grid of pipe VT2 is connect by resistance R6 with the second end of bidirectional trigger diode DB, the second output of source electrode and rectifier bridge 20
End connection；The first end of capacitor C5 is connect with the drain electrode of the second field-effect tube VT2, the source of second end and the second field-effect tube VT2
Pole connection；The first end of tertiary winding L3 and the second output terminal of rectifier bridge connect, and second end passes through resistance R7 and second effect
Should pipe VT2 grid connection；The anode of 9th diode D9 and the second output terminal of rectifier bridge connect, cathode and the second field-effect
The grid of pipe VT2 connects；The first end of second winding L2 and the source electrode of the first field-effect tube VT1 and the cathode of the 7th diode D7
It is all connected with, first output end of the second end as half bridge converter；The leakage of the first end of capacitor C6 and the first field-effect tube VT1
Pole connection, second end are connect with the first end of capacitor C7；The second end of capacitor C7 and the second output terminal of rectifier bridge connect；Capacitor
Second output terminal of the node as half bridge converter between C6 and capacitor C7.
5. the power circuit of temperature control waistband as claimed in claim 4, it is characterised in that: the first winding L1, the second winding
L2 and tertiary winding L3 are wound on same magnetic core, form a self-excited driving transformer.
6. the power circuit of temperature control waistband as described in claim 1, it is characterised in that: second electronic switching circuit includes
Second controllable silicon SCR 2, resistance R8, resistance R9, resistance R10, the second photoelectrical coupler IOS2 and the second fuse FU2, second can
The input terminal of control silicon SCR2 is connect with firewire L, and output end is connect with the first end of the second fuse FU2, and control terminal passes through resistance
R8 is connect with input terminal, and control terminal is also connect with the first output end of the second photoelectrical coupler IOS2, the second photoelectrical coupler
The second output terminal of IOS2 is connect by resistance R9 with the output end of the second controllable silicon SCR 2, the electricity of the second photoelectrical coupler IOS2
Source is connect by resistance R10 with DC power supply VCC, and control terminal is connect with the second signal output end of control chip.
7. the power circuit of temperature control waistband as claimed in claim 6, it is characterised in that: the second of the second fuse FU2
It holds and is connect with the first end of the second input winding, the first end of the second output winding is connect with the input terminal of a relay RL, after
The control terminal of electric appliance RL is connect with the third signal output end of control chip U1, and the output end of relay RL is defeated as exchange anode
Outlet.
8. the power circuit of temperature control waistband as claimed in claim 7, it is characterised in that: the iron core step-down transformer TR2's
The middle part of second output winding is also drawn there are two intermediate output, and two intermediate outputs connect with the output end of a rectifier
It connects, the output end of rectifier is connect with the input terminal of a voltage-stablizer, and two output ends of voltage-stablizer are used as respectively as direct current just
Pole output end and direct current cathode output end.
9. the power circuit of temperature control waistband as claimed in claim 2, it is characterised in that: the iron core step-down transformer TR2's
The first end of second input winding is connect with the second end of the first fuse FU1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910593829.XA CN110277925A (en) | 2019-07-03 | 2019-07-03 | The power circuit of temperature control waistband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910593829.XA CN110277925A (en) | 2019-07-03 | 2019-07-03 | The power circuit of temperature control waistband |
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| Publication Number | Publication Date |
|---|---|
| CN110277925A true CN110277925A (en) | 2019-09-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910593829.XA Pending CN110277925A (en) | 2019-07-03 | 2019-07-03 | The power circuit of temperature control waistband |
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| CN2715721Y (en) * | 2004-03-18 | 2005-08-10 | 郑哲雄 | Cushion having warm therapeutic device |
| CN201120052Y (en) * | 2007-12-06 | 2008-09-24 | 东莞市京翼电子有限公司 | Ultralong wave therapy apparatus |
| CN201319691Y (en) * | 2008-11-15 | 2009-09-30 | 方成 | Ballast for electricity-saving lamp |
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