CN208401532U - Power supply circuit with leakage protection - Google Patents
Power supply circuit with leakage protection Download PDFInfo
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- CN208401532U CN208401532U CN201820695099.5U CN201820695099U CN208401532U CN 208401532 U CN208401532 U CN 208401532U CN 201820695099 U CN201820695099 U CN 201820695099U CN 208401532 U CN208401532 U CN 208401532U
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Abstract
The utility model discloses a power supply circuit with leakage protection, which comprises a rectification filter circuit, a PWM switch control circuit, a voltage-stabilized power supply circuit and a leakage protection circuit, wherein each circuit is electrically connected; the leakage protection circuit comprises an adjustable resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, an inductor L1, a chip IC54123, a magnetic ring ZT1, a switch K1 and a double-pole switch K2; when producing the electric leakage, resistance R3 circular telegram, and twine in wire on the magnetic ring ZT1 switches on, follows the wire that resistance R3 was drawn is passing through magnetic ring ZT1 produces induced electromotive force, makes double pole switch k2 disconnection plays earth leakage protection.
Description
Technical field
The utility model relates to electronic circuit technology fields, and in particular to a kind of earth leakage protective power circuit of band.
Background technique
When people accidentally touches firewire or the load of electric leakage situation occurs, firewire, human body, the earth, between zero curve
As soon as just will form a circuit, electric current is had on human body and is passed through, when electric current is sufficiently large, it is possible to do harm to huamn body.
The current Width funtion power supply for fan or cooling fan usually lacks earth leakage protective measure, in human contact to electric leakage equipment
When can cause serious injury to human body.Accordingly, it is desirable to provide a kind of power circuit with creepage protection function, to reduce electric leakage
Caused by endanger.
Utility model content
The purpose of this utility model is to provide a kind of earth leakage protective power circuits of band, to solve existing fan
Lack necessary leakage protection circuit on power circuit not and can be carried out earth leakage protective problem.
To achieve the above object, the technical solution of the utility model is
A kind of earth leakage protective power circuit of band, including current rectifying and wave filtering circuit, PWM ON-OFF control circuit, regulated power supply electricity
Road and leakage protection circuit, each circuit electrical connection；
The leakage protection circuit includes adjustable resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitor C1, electricity
Hold C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, diode D1, diode D2, diode D3, diode D4, diode
D5, inductance L1, chip IC 54123, magnet ring ZT1, switch K1 and double-pole switch k2；
Capacitor C5 is electrically connected between the pin 6 and pin 7 of the chip IC 54123；
The common end of the capacitor C5 and the pin 7 of the chip IC 54123 is electrically connected to one end of the capacitor C2, institute
The other end for stating capacitor C2 is electrically connected the cathode of the diode D5；
The pin 5 of the chip IC 54123 and the common end of pin 4 are electrically connected with the capacitor C3；
The resistance R2 and capacitor C6 electrical connection and its common end are electrically connected to the pin 8 of the chip IC 54123；
The other end of the resistance R2 is electrically connected to the anode of the diode D5；
The cathode of the diode D3 is electrically connected to the anode of the diode D1, the cathode electrical connection of the diode D4
In the anode of the diode D2, the anode electrical connection of the anode and the diode D2 of the diode D1, the diode
The common end of D1 and the diode D2 are electrically connected to the common end of the resistance R2 and diode D5, the diode D3 and institute
State the anode electrical connection of diode D4；
The pin 1 of the chip IC 54123 is electrically connected to the common end of the capacitor C4 and capacitor C1, the diode
D5, capacitor C2, capacitor C3, capacitor C4, the pin 3 of chip IC 54123 and capacitor C6 common end be electrically connected to the diode
The common end of D3 and the diode D4；
One end of the inductance L1 is electrically connected between the diode D1 and the diode D3, the adjustable resistance R1
One end be electrically connected between the diode D2 and diode D4, the common end of the inductance L1 and adjustable resistance R1 electricity
It is connected to zero curve；
The other end electrical connection capacitor C1's of pin 2 the electric connection resistance R4, the resistance R4 of the chip IC 54123 is another
One end；
One end of the resistance R3 is electrically connected to the common end of capacitor C1 and resistance R4, and the other end of the resistance R3 is electrically connected
It is connected to the common end of capacitor C1 and capacitor C4；From the wire intertwist of the extraction of the resistance R3 in the side of the magnet ring ZT1；
One end of the resistance R5 is electrically connected on firewire, and the lead-out wire of the other end is wound in the another of the magnet ring ZT1
Side；The other end of the resistance R5 is electrically connected switch K1, and the other end of the switch K1 is electrically connected on firewire；In firewire and
Double-pole switch k2 is electrically connected on zero curve.
Wherein, the voltage-stabilized power supply circuit includes triode T1, resistance R6, resistance R7 and diode D6；
One end of the resistance R6 is electrically connected the c pin of the triode T1, and the other end of the resistance R6 is electrically connected institute
The b pin of triode T1 is stated, the e pin of the triode T1 is electrically connected the resistance R7；The cathode of the diode D6 is electrically connected
It is connected to the common end of the b pin of the resistance R6 and the triode T1；The anode of the diode D6 is with the resistance R7's
Common end grounding；The public termination 5V power supply of the c pin of the resistance R6 and triode T1.
Wherein, the PWM ON-OFF control circuit includes SG3525 chip, capacitor C7, capacitor C8, capacitor C9, resistance R8, electricity
Hinder R9 and diode D7；
Pin 5, pin 6, pin 7 and the pin 8 of the SG3525 chip are grounded；1 electricity of pin of the SG3525 chip
Connect capacitor C9；The resistance R8 and capacitor C8 parallel connection and its common end are electrically connected to the pin 2 and resistance R9 of SG3525 chip
Between；The other end of the resistance R9 is electrically connected the capacitor C7；The common end of the capacitor C7 and resistance R9 is electrically connected to institute
The cathode of diode D7 is stated, the anode of the diode D7 connects zero curve；The capacitor C9, resistance R8, capacitor C8 and capacitor C7
Common end grounding.
Wherein, the current rectifying and wave filtering circuit includes resistance R10, resistance R11, diode D8, diode D9, capacitor C10, electricity
Hold C11 and inductance L2；
The inductance L2 and resistance R10 is in parallel；The capacitor C10 is electrically connected to the inductance L2 and the resistance
A common end of R10, the capacitor C11 are electrically connected to another common end of the inductance L2 and the resistance R10；It is described
The public terminal connecting zero line of capacitor C10 and the capacitor C11；
The resistance R11 is electrically connected the anode of the diode D8, and the cathode of the diode D8 is electrically connected two pole
The anode of pipe D9, the cathode of the diode D9 are electrically connected to the common end of the capacitor C10, resistance R10 and inductance L2；It is described
The other end of resistance R11 is started to exchange fire line.
Wherein, the pin 4 of the public chip termination SG3525 of the inductance L2, resistance R10, capacitor C11；The capacitor
The common end grounding of C10, capacitor C11；The diode D7 anode connects zero curve；The anode of the diode D6 and the common end of R7
Ground connection；The public terminal connecting zero line of the resistance R7 and triode T1；Firewire and zero curve are arranged in the magnet ring ZT1.
Wherein, further include switching circuit, the switching circuit include resistance R12, resistance R13, resistance R14, resistance R15,
Reverse-blocking tetrode thyristor Q1, reverse-blocking tetrode thyristor Q2, reverse-blocking tetrode thyristor Q3 and reverse-blocking tetrode thyristor Q4, capacitor C12, motor M, fuse FU and
Zero passage detection and switching module；
The zero passage detection and switching module include resistance R17, resistance R16 and photoelectrical coupler U1；
The end T1 of the reverse-blocking tetrode thyristor Q1, the end T1 of the reverse-blocking tetrode thyristor Q2, the reverse-blocking tetrode thyristor Q3 the end T1
It is electrically connected zero curve；
The end T2 of the reverse-blocking tetrode thyristor Q1 is electrically connected the pin 1 of transferring the files of the motor M, the T2 of the reverse-blocking tetrode thyristor Q2
End is electrically connected the pin 2 of transferring the files of the motor M, and the end T2 of the reverse-blocking tetrode thyristor Q3 is electrically connected the pin of transferring the files of the motor M
3；
The control terminal of control terminal the electric connection resistance R12, the reverse-blocking tetrode thyristor Q2 of the reverse-blocking tetrode thyristor Q1 are electrically connected
The control terminal electric connection resistance R14 of resistance R13, the reverse-blocking tetrode thyristor Q3；
The reverse-blocking tetrode thyristor Q4 is series on the firewire of the motor M, is parallel with capacitor with the reverse-blocking tetrode thyristor Q4
C12 and resistance R15；The reverse-blocking tetrode thyristor Q4 is electrically connected to the motor M by fuse FU；
A primary exit of the photoelectrical coupler U1 is electrically connected to the reverse-blocking tetrode thyristor by resistance R16
The common end of Q4, capacitor C12 and resistance R15, another primary exit of the photoelectrical coupler U1 are electrically connected to described
The control terminal of reverse-blocking tetrode thyristor Q4；
A secondary exit of the photoelectrical coupler U1 is electrically connected the zero passage detection and switching by resistance R17
Secondary another exit ground connection of the control terminal SLEEP of module, photoelectrical coupler U1.
The utility model has the advantages that
The utility model with earth leakage protective power circuit, including it is current rectifying and wave filtering circuit, PWM ON-OFF control circuit, steady
Piezoelectricity source circuit and leakage protection circuit, each circuit electrical connection；
The leakage protection circuit includes adjustable resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitor C1, electricity
Hold C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, diode D1, diode D2, diode D3, diode D4, diode
D5, inductance L1, chip IC 54123, magnet ring ZT1, switch K1 and double-pole switch k2；
Capacitor C5 is electrically connected between the pin 6 and pin 7 of the chip IC 54123；
The common end of the capacitor C5 and the pin 7 of the chip IC 54123 is electrically connected to one end of the capacitor C2, institute
The other end for stating capacitor C2 is electrically connected the cathode of the diode D5；
The pin 5 of the chip IC 54123 and the common end of pin 4 are electrically connected with the capacitor C3；
The resistance R2 and capacitor C6 electrical connection and its common end are electrically connected to the pin 8 of the chip IC 54123；
The other end of the resistance R2 is electrically connected to the anode of the diode D5；
The cathode of the diode D3 is electrically connected to the anode of the diode D1, the cathode electrical connection of the diode D4
In the anode of the diode D2, the anode electrical connection of the anode and the diode D2 of the diode D1, the diode
The common end of D1 and the diode D2 are electrically connected to the common end of the resistance R2 and diode D5, the diode D3 and institute
State the anode electrical connection of diode D4；
The pin 1 of the chip IC 54123 is electrically connected to the common end of the capacitor C4 and capacitor C1, the diode
D5, capacitor C2, capacitor C3, capacitor C4, the pin 3 of chip IC 54123 and capacitor C6 common end be electrically connected to the diode
The common end of D3 and the diode D4；
One end of the inductance L1 is electrically connected between the diode D1 and the diode D3, the adjustable resistance R1
One end be electrically connected between the diode D2 and diode D4, the common end of the inductance L1 and adjustable resistance R1 electricity
It is connected to zero curve；
The other end electrical connection capacitor C1's of pin 2 the electric connection resistance R4, the resistance R4 of the chip IC 54123 is another
One end；
One end of the resistance R3 is electrically connected to the common end of capacitor C1 and resistance R4, and the other end of the resistance R3 is electrically connected
It is connected to the common end of capacitor C1 and capacitor C4；From the wire intertwist of the extraction of the resistance R3 in the side of the magnet ring ZT1；
One end of the resistance R5 is electrically connected on firewire, and the lead-out wire of the other end is wound in the another of the magnet ring ZT1
Side；The other end of the resistance R5 is electrically connected switch K1, and the other end of the switch K1 is electrically connected on firewire；In firewire and
Double-pole switch k2 is electrically connected on zero curve；
When generating electric leakage, resistance R3 is powered, and the line conducting being wound on the magnet ring ZT1, draws from the resistance R3
Line out passes through the magnet ring ZT1 after powered up and generates induced electromotive force, disconnects the double-pole switch k2, plays electric leakage and protects
Shield.
Detailed description of the invention
Fig. 1 is the current rectifying and wave filtering circuit circuit of the utility model.
Fig. 2 is the PWM ON-OFF control circuit of the utility model.
Fig. 3 is the voltage-stabilized power supply circuit of the utility model.
Fig. 4 is the leakage protection circuit of the utility model.
Fig. 5 is the switching circuit of the utility model.
1- current rectifying and wave filtering circuit；2-PWM ON-OFF control circuit；3- voltage-stabilized power supply circuit；4- leakage protection circuit.
Specific embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
Embodiment 1 with earth leakage protective power circuit, which is characterized in that including current rectifying and wave filtering circuit 1, PWM switch control
Circuit 2, voltage-stabilized power supply circuit 3 and leakage protection circuit 4 processed, each circuit electrical connection；The leakage protection circuit 4 includes adjustable
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6,
Diode D1, diode D2, diode D3, diode D4, diode D5, inductance L1, chip IC 54123, magnet ring ZT1, switch
K1 and double-pole switch k2；Firewire and zero curve are arranged in the magnet ring ZT1；
Capacitor C5 is electrically connected between the pin 6 and pin 7 of the chip IC 54123；The capacitor C5 and the chip
The common end of the pin 7 of IC54123 is electrically connected to one end of the capacitor C2, the other end electrical connection described two of the capacitor C2
The cathode of pole pipe D5；The pin 5 of the chip IC 54123 and the common end of pin 4 are electrically connected with the capacitor C3；The resistance
R2 and capacitor C6 electrical connection and its common end are electrically connected to the pin 8 of the chip IC 54123；The resistance R2's is another
End is electrically connected to the anode of the diode D5；
The cathode of the diode D3 is electrically connected to the anode of the diode D1, the cathode electrical connection of the diode D4
In the anode of the diode D2, the anode electrical connection of the anode and the diode D2 of the diode D1, the diode
The common end of D1 and the diode D2 are electrically connected to the common end of the resistance R2 and diode D5, the diode D3 and institute
State the anode electrical connection of diode D4；
The pin 1 of the chip IC 54123 is electrically connected to the common end of the capacitor C4 and capacitor C1, the diode
D5, capacitor C2, capacitor C3, capacitor C4, the pin 3 of chip IC 54123 and capacitor C6 common end be electrically connected to the diode
The common end of D3 and the diode D4；One end of the inductance L1 be electrically connected to the diode D1 and diode D3 it
Between, one end of the adjustable resistance R1 is electrically connected between the diode D2 and diode D4, the inductance L1 and it is described can
The common end of resistance R1 is adjusted to be electrically connected to zero curve；
The other end electrical connection capacitor C1's of pin 2 the electric connection resistance R4, the resistance R4 of the chip IC 54123 is another
One end；One end of the resistance R3 is electrically connected to the common end of capacitor C1 and resistance R4, the other end electrical connection of the resistance R3
In the common end of capacitor C1 and capacitor C4；From the wire intertwist of the extraction of the resistance R3 in the side of the magnet ring ZT1；
One end of the resistance R5 is electrically connected on firewire, and the lead-out wire of the other end is wound in the another of the magnet ring ZT1
Side；The other end of the resistance R5 is electrically connected switch K1, and the other end of the switch K1 is electrically connected on firewire；In firewire and
Double-pole switch k2 is electrically connected on zero curve.When generating electric leakage, resistance R3 is powered, and the line being wound on the magnet ring ZT1 is led
Logical, the line drawn from the resistance R3 is generating induced electromotive force by the magnet ring ZT1, disconnects the double-pole switch k2,
Play earth leakage protective.
Embodiment 2
Further, on the basis of embodiment 1:
The voltage-stabilized power supply circuit 3 includes triode T1, resistance R6, resistance R7 and diode D6；The one of the resistance R6
End is electrically connected the c pin of the triode T1, and the other end of the resistance R6 is electrically connected the b pin of the triode T1, described
The e pin of triode T1 is electrically connected the resistance R7；The cathode of the diode D6 is electrically connected to the resistance R6 and described three
The common end of the b pin of pole pipe T1；The common end grounding of the anode and the resistance R7 of the diode D6；The resistance R6 with
The public termination 5V power supply of the c pin of the triode T1.
The PWM ON-OFF control circuit 2 includes SG3525 chip, capacitor C7, capacitor C8, capacitor C9, resistance R8, resistance R9
With diode D7；The PWM ON-OFF control circuit 2 can become the high pressure of DC120~400V the switching pulse of DC5V or so；
Pin 5, pin 6, pin 7 and the pin 8 of the SG3525 chip are grounded；1 electricity of pin of the SG3525 chip
Connect capacitor C9；The resistance R8 and capacitor C8 parallel connection and its common end are electrically connected to the pin 2 and resistance R9 of SG3525 chip
Between；The other end of the resistance R9 is electrically connected the capacitor C7；The common end of the capacitor C7 and resistance R9 is electrically connected to institute
The cathode of diode D7 is stated, the anode of the diode D7 connects zero curve；The capacitor C9, resistance R8, capacitor C8 and capacitor C7
Common end grounding.
Embodiment 3
Further, on the basis of embodiment 2:
The current rectifying and wave filtering circuit 1 includes resistance R10, resistance R11, diode D8, diode D9, capacitor C10, capacitor
C11 and inductance L2；
The current rectifying and wave filtering circuit circuit 1 is used to 85V-285V alternating voltage change into DC120-400V smooth voltage.
The inductance L2 and resistance R10 is in parallel；The capacitor C10 is electrically connected to the inductance L2 and the resistance
A common end of R10, the capacitor C11 are electrically connected to another common end of the inductance L2 and the resistance R10；It is described
The public terminal connecting zero line of capacitor C10 and the capacitor C11；
The resistance R11 is electrically connected the anode of the diode D8, and the cathode of the diode D8 is electrically connected two pole
The anode of pipe D9, the cathode of the diode D9 are electrically connected to the common end of the capacitor C10, resistance R10 and inductance L2；It is described
The other end of resistance R11 is started to exchange fire line.
The pin 4 of the public chip termination SG3525 of the inductance L2, resistance R10, capacitor C11；The capacitor C10, electricity
Hold the common end grounding of C11；The diode D7 anode connects zero curve；The anode of the diode D6 and the common end grounding of R7；
The public terminal connecting zero line of the resistance R7 and triode T1.
Embodiment 4
Further, on the basis of embodiment 1:
The switching circuit of the present embodiment, the switching circuit include resistance R12, resistance R13, resistance R14, resistance R15, can
Control transwitch Q1, reverse-blocking tetrode thyristor Q2, reverse-blocking tetrode thyristor Q3 and reverse-blocking tetrode thyristor Q4, capacitor C12, motor M, fuse FU and mistake
Zero detection and switching module；The zero passage detection and switching module include resistance R17, resistance R16 and photoelectrical coupler U1；It is described
The end T1 of reverse-blocking tetrode thyristor Q1, the end T1 of the reverse-blocking tetrode thyristor Q2, the reverse-blocking tetrode thyristor Q3 the end T1 be electrically connected zero curve；
The end T2 of the reverse-blocking tetrode thyristor Q1 is electrically connected the pin 1 of transferring the files of the motor M, the T2 of the reverse-blocking tetrode thyristor Q2
End is electrically connected the pin 2 of transferring the files of the motor M, and the end T2 of the reverse-blocking tetrode thyristor Q3 is electrically connected the pin of transferring the files of the motor M
3；The control terminal electric connection resistance R12 of the reverse-blocking tetrode thyristor Q1, the control terminal electric connection resistance of the reverse-blocking tetrode thyristor Q2
The control terminal electric connection resistance R14 of R13, the reverse-blocking tetrode thyristor Q3；The reverse-blocking tetrode thyristor Q4 is series at the fire of the motor M
On line, capacitor C12 and resistance R15 are parallel with the reverse-blocking tetrode thyristor Q4；The reverse-blocking tetrode thyristor Q4 passes through fuse FU electricity
It is connected to the motor M；
A primary exit of the photoelectrical coupler U1 is electrically connected to the reverse-blocking tetrode thyristor by resistance R16
The common end of Q4, capacitor C12 and resistance R15, another primary exit of the photoelectrical coupler U1 are electrically connected to described
The control terminal of reverse-blocking tetrode thyristor Q4；A secondary exit of the photoelectrical coupler U1 passes through described in resistance R17 electrical connection
Secondary another exit ground connection of the control terminal SLEEP of zero passage detection and switching module, photoelectrical coupler U1.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (6)
1. a kind of earth leakage protective power circuit of band, which is characterized in that including current rectifying and wave filtering circuit (1), PWM ON-OFF control circuit
(2), voltage-stabilized power supply circuit (3) and leakage protection circuit (4), each circuit electrical connection；
The leakage protection circuit (4) includes adjustable resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitor C1, capacitor
C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, diode D1, diode D2, diode D3, diode D4, diode D5,
Inductance L1, chip IC 54123, magnet ring ZT1, switch K1 and double-pole switch k2；Firewire and zero curve are arranged in the magnet ring ZT1；
Capacitor C5 is electrically connected between the pin 6 and pin 7 of the chip IC 54123；
The common end of the capacitor C5 and the pin 7 of the chip IC 54123 is electrically connected to one end of the capacitor C2, the electricity
The other end for holding C2 is electrically connected the cathode of the diode D5；
The pin 5 of the chip IC 54123 and the common end of pin 4 are electrically connected with the capacitor C3；
The resistance R2 and capacitor C6 electrical connection and its common end are electrically connected to the pin 8 of the chip IC 54123；It is described
The other end of resistance R2 is electrically connected to the anode of the diode D5；
The cathode of the diode D3 is electrically connected to the anode of the diode D1, and the cathode of the diode D4 is electrically connected to institute
State the anode of diode D2, the anode electrical connection of the anode and the diode D2 of the diode D1, the diode D1 and
The common end of the diode D2 is electrically connected to the common end of the resistance R2 and diode D5, the diode D3 and described two
The anode electrical connection of pole pipe D4；
The pin 1 of the chip IC 54123 is electrically connected to the common end of the capacitor C4 and capacitor C1, the diode D5, electricity
The common end for holding C2, capacitor C3, capacitor C4, the pin 3 of chip IC 54123 and capacitor C6 is electrically connected to the diode D3 and institute
State the common end of diode D4；
One end of the inductance L1 is electrically connected between the diode D1 and the diode D3, and the one of the adjustable resistance R1
End is electrically connected between the diode D2 and diode D4, the common end electrical connection of the inductance L1 and the adjustable resistance R1
In zero curve；
The other end electrical connection capacitor C1's of pin 2 the electric connection resistance R4, the resistance R4 of the chip IC 54123 is another
End；
One end of the resistance R3 is electrically connected to the common end of capacitor C1 and resistance R4, and the other end of the resistance R3 is electrically connected to
The common end of capacitor C1 and capacitor C4；From the wire intertwist of the extraction of the resistance R3 in the side of the magnet ring ZT1；
One end of the resistance R5 is electrically connected on firewire, and the lead-out wire of the other end is wound in the other side of the magnet ring ZT1；
The other end of the resistance R5 is electrically connected switch K1, and the other end of the switch K1 is electrically connected on firewire；In firewire and zero curve
On be electrically connected with double-pole switch k2.
2. according to claim 1 with earth leakage protective power circuit, which is characterized in that voltage-stabilized power supply circuit (3) packet
Include triode T1, resistance R6, resistance R7 and diode D6；
One end of the resistance R6 is electrically connected the c pin of the triode T1, the other end electrical connection described three of the resistance R6
The e pin of the b pin of pole pipe T1, the triode T1 is electrically connected the resistance R7；The cathode of the diode D6 is electrically connected to
The common end of the b pin of the resistance R6 and the triode T1；The anode of the diode D6 is public with the resistance R7's
End ground connection；The public termination 5V power supply of the c pin of the resistance R6 and triode T1.
3. according to claim 2 with earth leakage protective power circuit, which is characterized in that the PWM ON-OFF control circuit (2)
Including SG3525 chip, capacitor C7, capacitor C8, capacitor C9, resistance R8, resistance R9 and diode D7；
Pin 5, pin 6, pin 7 and the pin 8 of the SG3525 chip are grounded；The pin 1 of the SG3525 chip is electrically connected
Capacitor C9；The resistance R8 and capacitor C8 is in parallel and its common end is electrically connected between the pin 2 of SG3525 chip and resistance R9；
The other end of the resistance R9 is electrically connected the capacitor C7；The common end of the capacitor C7 and resistance R9 is electrically connected to two pole
The anode of the cathode of pipe D7, the diode D7 connects zero curve；The common end of the capacitor C9, resistance R8, capacitor C8 and capacitor C7
Ground connection.
4. according to claim 3 with earth leakage protective power circuit, which is characterized in that current rectifying and wave filtering circuit (1) packet
Include resistance R10, resistance R11, diode D8, diode D9, capacitor C10, capacitor C11 and inductance L2；
The inductance L2 and resistance R10 is in parallel；The capacitor C10 is electrically connected to the inductance L2's and resistance R10
One common end, the capacitor C11 are electrically connected to another common end of the inductance L2 and the resistance R10；The capacitor
The public terminal connecting zero line of C10 and the capacitor C11；
The resistance R11 is electrically connected the anode of the diode D8, and the cathode of the diode D8 is electrically connected the diode D9
Anode, the cathode of the diode D9 is electrically connected to the common end of the capacitor C10, resistance R10 and inductance L2；The resistance
The other end of R11 is started to exchange fire line.
5. according to claim 4 with earth leakage protective power circuit, which is characterized in that the inductance L2, resistance R10, electricity
Hold the pin 4 of the public chip termination SG3525 of C11；The common end grounding of the capacitor C10, capacitor C11；The diode D7
Anode connects zero curve；The anode of the diode D6 and the common end grounding of R7；The public termination of the resistance R7 and triode T1
Zero curve.
6. according to claim 1 with earth leakage protective power circuit, which is characterized in that it further include switching circuit, it is described to cut
Circuit is changed to include resistance R12, resistance R13, resistance R14, resistance R15, reverse-blocking tetrode thyristor Q1, reverse-blocking tetrode thyristor Q2, silicon-controlled open
Close Q3 and reverse-blocking tetrode thyristor Q4, capacitor C12, motor M, fuse FU and zero passage detection and switching module；
The zero passage detection and switching module include resistance R17, resistance R16 and photoelectrical coupler U1；
The end T1 of the reverse-blocking tetrode thyristor Q1, the end T1 of the reverse-blocking tetrode thyristor Q2, the end T1 of the reverse-blocking tetrode thyristor Q3 are electric
Connect zero curve；
The end T2 of the reverse-blocking tetrode thyristor Q1 is electrically connected the pin 1 of transferring the files of the motor M, the end the T2 electricity of the reverse-blocking tetrode thyristor Q2
The pin 2 of transferring the files of the motor M is connected, the end T2 of the reverse-blocking tetrode thyristor Q3 is electrically connected the pin 3 of transferring the files of the motor M；
The control terminal electric connection resistance R12 of the reverse-blocking tetrode thyristor Q1, the control terminal electric connection resistance of the reverse-blocking tetrode thyristor Q2
The control terminal electric connection resistance R14 of R13, the reverse-blocking tetrode thyristor Q3；
The reverse-blocking tetrode thyristor Q4 is series on the firewire of the motor M, with the reverse-blocking tetrode thyristor Q4 be parallel with capacitor C12 and
Resistance R15；The reverse-blocking tetrode thyristor Q4 is electrically connected to the motor M by fuse FU；
A primary exit of the photoelectrical coupler U1 is electrically connected to the reverse-blocking tetrode thyristor Q4, electricity by resistance R16
Hold the common end of C12 and resistance R15, another primary exit of the photoelectrical coupler U1 is electrically connected to described silicon-controlled
The control terminal of switch Q4；
A secondary exit of the photoelectrical coupler U1 is electrically connected the zero passage detection and switching module by resistance R17
Control terminal SLEEP, secondary another exit ground connection of photoelectrical coupler U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695099.5U CN208401532U (en) | 2018-05-10 | 2018-05-10 | Power supply circuit with leakage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695099.5U CN208401532U (en) | 2018-05-10 | 2018-05-10 | Power supply circuit with leakage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208401532U true CN208401532U (en) | 2019-01-18 |
Family
ID=65062169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820695099.5U Expired - Fee Related CN208401532U (en) | 2018-05-10 | 2018-05-10 | Power supply circuit with leakage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208401532U (en) |
-
2018
- 2018-05-10 CN CN201820695099.5U patent/CN208401532U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190118 Termination date: 20190510 |