CN211239325U - Intermediate frequency power supply linkage protection control system - Google Patents
Intermediate frequency power supply linkage protection control system Download PDFInfo
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- CN211239325U CN211239325U CN201922469532.0U CN201922469532U CN211239325U CN 211239325 U CN211239325 U CN 211239325U CN 201922469532 U CN201922469532 U CN 201922469532U CN 211239325 U CN211239325 U CN 211239325U
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Abstract
The utility model discloses an intermediate frequency power supply linkage protection control system, which comprises at least two linkage protection control modules with the same circuit structure, wherein each linkage protection control module is coupled with an intermediate frequency power supply mainboard corresponding to the linkage protection control module and is coupled with other linkage protection control modules through a linkage signal line; the linkage protection control module comprises a conversion unit and a control unit; the conversion unit comprises a signal conversion circuit, and is used for inputting a fault signal of the linkage signal line into the control unit or receiving the fault signal of the control unit and converting the fault signal into the linkage signal line; the control unit comprises a control circuit and a plurality of switch circuits which are coupled with the control circuit and have the same circuit structure, each switch circuit is coupled with the control end of the rectification or inversion unit of the intermediate frequency power supply, and the control circuit is used for controlling the switch circuit to switch off the power supply of the control end of the rectification or inversion unit after receiving a mainboard fault signal output by the signal conversion circuit or receiving a fault signal output by any one stage of switch circuit and then sending the fault signal to the conversion circuit.
Description
Technical Field
The utility model relates to an intermediate frequency power supply application mainly is the protection control to intermediate frequency power supply.
Background
Nowadays, medium frequency induction heating equipment is mostly high-power equipment, so adopt the electrical power generating system including many medium frequency power supply more, and every medium frequency power supply includes a plurality of rectification control units, nevertheless because a medium frequency power supply trouble appears in the practical application often and jumps the machine, and another medium frequency power supply normal operating, the medium frequency power supply of fault shutdown bears the high voltage and then burns out a large amount of electrical components, leads to the loss to enlarge.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough of above technique, provide a circuit simply, maneuverability is strong, the reliable intermediate frequency power supply linkage protection control system of control.
The utility model discloses take following technical scheme to realize:
the linkage protection control system of the intermediate frequency power supply comprises at least two linkage protection control modules with the same circuit structure, wherein each linkage protection control module is coupled with an intermediate frequency power supply mainboard corresponding to the linkage protection control module and is coupled with other linkage protection control modules through linkage signal lines. Each linkage protection control module comprises a conversion unit and a control unit. The conversion unit comprises a signal conversion circuit, a power supply access end of the signal conversion circuit is coupled with a power supply, a first signal transmission end is coupled with a module corresponding to a fault signal output end of the intermediate frequency power supply main control board and a linkage signal line, a second signal input end and a signal output end are coupled with the control unit, and the signal conversion circuit is used for converting a fault signal input by the first signal transmission end into a signal output end and inputting the signal output end into the control unit or receiving the fault signal output by the control unit through the second signal input end and converting the fault signal into the first signal transmission end. The control unit comprises a control circuit and a plurality of stages of switch circuits which are coupled with the control circuit and have the same circuit structure, each stage of switch circuit is respectively coupled with a rectification or inversion unit control end of the module corresponding to the intermediate frequency power supply, and the control circuit is used for controlling the switch circuit to switch off the power supply of the rectification or inversion unit control end after receiving a mainboard fault signal output by the signal conversion circuit or sending a fault signal to the conversion circuit after receiving a fault signal output by any stage of switch circuit.
In a power supply system comprising a plurality of intermediate frequency power supplies, one intermediate frequency power supply has a fault, a main control board sends a fault signal to be input to a first signal transmission end, and the fault intermediate frequency power supply is controlled to turn off a power supply at a control end of a rectification or inversion unit through a signal conversion circuit in a conversion unit and a control circuit and a switch circuit in a control unit. Meanwhile, a fault signal is input to the first signal transmission ends of other intermediate frequency power supplies in the power supply system through a linkage signal line, and the intermediate frequency power supply which normally works is controlled to turn off the power supply at the control end of the rectification or inversion unit through a signal conversion circuit in the conversion unit and a control circuit and a switch circuit in the control unit. When the power supply at the control end of the rectification or inversion unit of any intermediate frequency power supply in the power supply system is short-circuited or open-circuited, a fault signal is fed back to the control circuit in the control unit through the switch circuit in the intermediate frequency power supply control unit, the power supply at the control end of the rectification or inversion unit of the intermediate frequency power supply is turned off, meanwhile, the fault signal is input to other intermediate frequency power supplies in the power supply system through a linkage signal line through the second signal input end of the conversion circuit of the intermediate frequency power supply conversion unit, and the power supply at the control end of the rectification or inversion unit of the intermediate frequency power supply is turned off through the linkage protection control module of the other intermediate frequency.
Further, the signal conversion circuit comprises optical couplers UF 1-UF 2 and a resistor R1. One end of the resistor R1 is coupled to the power source VCC1 as a first power source access terminal, and the other end is coupled to a first input terminal of the optocoupler UF 1. A second input end of the optical coupler UF1 and a first output end of the optical coupler UF2 are coupled as a first signal transmission end, a first output end of the optical coupler UF1 is coupled as a signal output end to the control circuit, and a second output end is coupled to a signal ground. A first input terminal of the optical coupler UF2 is coupled to the control circuit as a second signal input terminal, a second input terminal is coupled to the signal ground, and a second output terminal is coupled to the power ground as a second power input terminal.
The first input end of the optical coupler UF1 is connected to a power supply VCC1 through a resistor R1, the second input end of the optical coupler UF1 inputs a low-level fault signal transmitted by a linkage signal line, the optical coupler UF1 is conducted, and the first output end of the optical coupler UF1 outputs the low-level fault signal to a control circuit. A first input end of the optical coupler UF2 inputs a low-level control signal output by the control circuit, the optical coupler UF2 is conducted, and a first output end of the UF2 outputs a low-level fault signal to the linkage signal line.
Further, the control circuit comprises a singlechip IC5, resistors R2-R3, capacitors C1-C3, capacitors C6-C7, a capacitor EC1, a voltage stabilizing module IC1 and a crystal oscillator CY 1; a VCC pin of the single chip IC5 is coupled to a pin Vout of a voltage stabilization module IC1, a pin P3.4 is coupled to a signal output terminal of the signal conversion circuit, a pin P3.0 is coupled to a second signal input terminal of the signal conversion circuit through a resistor R3, pins P1.5, P1.1 and P3.7 are coupled to a signal input terminal of the switch circuit, pins P1.6, P1.2 and P1.0 are coupled to a fault signal output terminal of the switch circuit, respectively, a RST pin is coupled to a signal ground through a resistor R2, a pin XTAL1 is coupled to the signal ground through a capacitor C2, a pin XTAL2 is coupled to the signal ground through a capacitor C1, and a pin GND is coupled to the signal ground; the crystal oscillator CY1 is coupled between the XTAL1 pin and the XTAL2 pin of the singlechip IC 5; a pin VIN of the voltage stabilizing module IC1 is coupled with a +22V power supply, and a GND pin is used as a signal ground reference end; the capacitor C3 and the capacitor EC1 are coupled in parallel between the pins VIN and GND of the regulator module IC 1.
Vout output of the voltage stabilizing module IC1 provides a stable working power supply for a singlechip IC5, a crystal oscillator CY1 provides a basic clock signal for the singlechip to work, a pin P3.4 is used for detecting a fault signal input by the signal conversion circuit, pins P1.5, P1.1 and P3.7 control output voltage of the switch circuit according to the detected fault signal, pins P1.6, P1.2 and P1.0 are used for detecting whether the output voltage of the switch circuit has open circuit or short circuit fault, and a pin P3.0 outputs a fault signal fed back by the switch circuit to the signal conversion circuit.
Furthermore, each stage of switch circuit comprises a power switch module ICAn, an in pin of the power switch module ICAn is coupled with a single chip microcomputer of the control circuit as a signal input end, a st pin is coupled with the single chip microcomputer of the control circuit as a fault signal output end, a Vbb pin is coupled with a +22V power supply, an out pin is coupled with a control end of a rectifying or inverting unit of the intermediate frequency power supply as a power output end, and a gnd pin is coupled with a signal ground.
And an out pin of the power switch module LCAn is coupled with a power supply at a control end of the intermediate frequency power supply rectifying or inverting unit, and the power supply at the control end of the intermediate frequency power supply rectifying or inverting unit has a short circuit or open circuit fault, and st outputs a fault signal to the single chip microcomputer.
Furthermore, the linkage protection control module further comprises a first indicator light unit for indicating the working state of the intermediate frequency power supply. The first indicator light unit comprises resistors R4, R7-R8, an optical coupler UF3, capacitors C4-C5, a bidirectional thyristor T1 and a signal light L2. A first input end of the optocoupler UF3 is coupled to a P3.3 pin of the monolithic IC5 through a resistor R7, a second input end is coupled to a signal ground, a first output end is coupled to one end of the resistor R4, and a second output end is coupled to one end of the resistor R8, one end of the capacitor C5, and a control end of the triac T1. The other end of the resistor R4, the first terminal of the triac T1 and one end of the capacitor C4 are coupled to one end of the signal lamp L2, the other end of the resistor R8, the other end of the capacitor C5, the second terminal of the triac T1 and the other end of the capacitor C4 are coupled to a first power supply terminal of the signal lamp L2, and the other end of the signal lamp L2 is coupled to a second power supply terminal.
The P3.3 pin of the singlechip IC5 is used for controlling the conduction of an optocoupler UF3 and further controlling the conduction of a bidirectional thyristor T1 so as to control the light-emitting state of a signal lamp L2.
Furthermore, the linkage protection control module also comprises a second indicator light unit for indicating the working state of the linkage protection control module. The second indicator light unit comprises a resistor R5 and a light emitting diode L1, one end of the resistor R5 is coupled to a P1.7 pin of the singlechip IC5, the other end of the resistor R5 is coupled to an anode of the light emitting diode L1, and a cathode of the light emitting diode L1 is coupled to a signal ground.
Further, the linkage protection control module further comprises a third indicator light unit, wherein the third indicator light unit comprises a resistor Ran and a light emitting diode LAn, and the resistor Ran and the light emitting diode LAn are coupled in series between the out pin and the gnd pin of the power switch module LCAn. The third indicator light unit is used for indicating whether the switch unit has power supply output.
The utility model has the following technical advantages or beneficial effects:
the intermediate frequency power supply linkage protection control system is simple in connection relation, a mainboard of each intermediate frequency power supply of a power supply system adopting a plurality of intermediate frequency power supplies is connected with the linkage protection control module, the linkage protection control modules are coupled with one another through linkage signal lines, and other intermediate frequency power supplies of the intermediate frequency power supply system can be stopped through the intermediate frequency power supply linkage protection control system when any intermediate frequency power supply in the power supply system fails. Meanwhile, the linkage protection control module can also detect whether the power supply at the control end of the controlled rectifying unit or the controlled inversion unit has open circuit or short circuit faults or not, and feed back the faults to the linkage protection control system of the intermediate frequency power supply, so that other non-fault intermediate frequency power supplies in the power supply system are stopped. By adopting the scheme, the problem that loss is enlarged due to the fact that a large number of electrical components are burnt out due to the fact that high voltage input by another normal working intermediate frequency power supply is borne after one intermediate frequency power supply in an intermediate frequency power supply system breaks down can be effectively solved.
The utility model discloses an among the linkage protection and control system, the required components and parts of every linkage protection control module are small in quantity, with low costs, and maneuverability is strong, control is reliable, possesses good economic nature and practicality.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the middle linkage protection control module of the present invention.
Fig. 2 is a schematic diagram of a connection relationship of an embodiment of the linkage protection control system for an intermediate frequency power supply of the present invention.
Detailed Description
In order to facilitate better understanding of the present invention for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are given by way of illustration only and do not limit the scope of the present invention.
Fig. 1 shows a specific embodiment of the linkage protection control module of the present invention, which includes a conversion unit, a control unit, and first to third indicator light units.
The conversion unit comprises a signal conversion circuit, and the signal conversion circuit comprises optical couplers UF 1-UF 2 and a resistor R1. Resistor R1 has one terminal coupled to power supply VCC1 and another terminal coupled to a first input terminal of optocoupler UF 1. A second input end of the optical coupler UF1 and a first output end of the optical coupler UF2 are coupled as a first signal transmission end, a first output end of the optical coupler UF1 is coupled with the control circuit, and a second output end is coupled with a signal ground. The optical coupler UF2 has a first input coupled to the control circuit, a second input coupled to signal ground, and a second output as a power input coupled to power ground. The signal conversion circuit is used for converting fault signals input by the linkage signal line to the input end of the control unit or converting fault signals output by the control unit to the linkage signal line. The optical coupler UF1 is used for converting a main control board fault signal input through a linkage signal line or a fault signal of other linkage protection control modules to the input end of the control unit, and the optical coupler UF2 is used for outputting the fault signal output by the control unit to the linkage signal line.
The control unit comprises a control circuit and a switch circuit with the same structure as the three-stage circuit, wherein the control circuit comprises a single chip microcomputer IC5, resistors R2-R3, capacitors C1-C3, capacitors C6-C7, a capacitor EC1, a voltage stabilizing module IC1 and a crystal oscillator CY 1. The voltage stabilizing module IC1 inputs +22V voltage and outputs +5V voltage to provide stable working power supply for the single chip microcomputer. Each stage of the switching circuit includes a power switch module ICAn, a resistor RAn, and a light emitting diode LAn. The crystal oscillator CY1 provides basic clock signals for the operation of the single chip microcomputer. A pin P3.4 of the single chip microcomputer is used as an input pin to detect a fault signal output by the optocoupler UF1, pins P1.5, P1.1, and P1.3 are used as output pins to control whether the power switch module ICAn normally outputs +22Vn, and pins P1.6, P1.2, and P1.0 are used as input pins to detect whether the +22Vn controlled by the power switch module has a short-circuit or open-circuit fault, and when the pins P1.6, P1.2, and P1.0 detect that the fault occurs, the pin P3.0 is used as an output pin to input the fault signal to the conversion unit.
The linkage protection control module also comprises a first indicator light unit for indicating the working state of the intermediate frequency power supply, a second indicator light unit for indicating the working state of the linkage protection control module, and a third indicator light unit for indicating the working state of the switch unit.
The first indicator light unit comprises an optocoupler UF3, a resistor R4, resistors R7-R8, a bidirectional thyristor T1, capacitors C4-C5 and a signal light L2. The monolithic pin machine P3.3 controls the conduction of the optocoupler UF3, and further enables the conduction of the bidirectional thyristor T1, so that the signal lamp L2 indicates the working state of the intermediate frequency power supply corresponding to the linkage control module.
The second indicator light unit comprises a resistor R5 and a light emitting diode L1, and the light emitting diode L1 is controlled by the single-chip pin machine P1.7, and the light emitting diode L1 is used for indicating the state of the linkage protection control module.
The third indicator light unit comprises a resistor RAn and a light emitting diode LAN, when the OUT end of the switch module ICAn outputs normally, the light emitting diode LAN emits light, and when the OUT end does not output, the light emitting diode LAN is extinguished.
The intermediate frequency power supply linkage protection control system in this embodiment is used for a power supply system including at least two intermediate frequency power supplies, the two intermediate frequency power supplies are respectively coupled to the 1# linkage protection control module and the 2# linkage protection control module, a connection relationship is shown in fig. 2, and the protection control system is described in detail below with reference to fig. 1 and 2.
As an implementation manner of the embodiment, the signal transmission terminal of the 1# linkage protection control module is coupled to the signal transmission terminal of the 2# linkage protection control module, the signal transmission terminal of the 1# linkage protection control module is coupled to the 1# intermediate frequency power supply main control board, and the signal transmission terminal of the 2# linkage protection control module is coupled to the 2# intermediate frequency power supply main control board. The +22V 1- +22V3 of the 1# linkage protection control module is respectively coupled with the 1# rectifying unit of the 1# intermediate frequency power supply, the 2# rectifying unit of the 1# intermediate frequency power supply and the inverting unit of the 1# intermediate frequency power supply, and the terminals +22V 1- +22V3 of the 2# linkage protection control module are respectively coupled with the 1# rectifying unit of the 2# intermediate frequency power supply, the 2# rectifying unit of the 2# intermediate frequency power supply and the inverting unit.
When the intermediate frequency power supply works normally, the signal transmission end, namely the first signal transmission end is always at a high level, and the optical couplers UF1 and UF2 are cut off. The power switch modules ICA 1-ICA 3 normally output power supplies of +22V 1- +22V 3.
When the 1# intermediate frequency power supply has over-current, over-voltage or power supply failure and other faults, the 1# intermediate frequency power supply main control board sends a low-level fault signal to the signal transmission end of the 1# linkage protection control module, and transmits the fault signal to the signal transmission end of the 2# linkage protection control module through the linkage control line. The fault signal of the signal transmission end of the 1# linkage protection control module enables an optical coupler UF1 of the 1# linkage protection control module to be conducted, after a pin P3.4 of the single chip microcomputer is used for detecting a low-level fault signal output by the optical coupler UF1, pins P1.5, P1.1 and P3.7 control power switch modules ICA 1-ICA 3 to stop outputting +22V 1- +22V3 power supplies, a 1# to 2# rectifying unit and an inverting unit of the 1# intermediate frequency power supply stop operating, and the 1# intermediate frequency power supply stops operating. The indicator lights LA 1-LA 3 are off. Pin P1.7 and pin P1.3 control the light emitting states of L1 and L2, respectively.
And the fault signal output to the signal transmission end of the 2# linkage protection control module controls the optical coupler UF1 of the 2# linkage protection control module to be switched on, so that a singlechip of the 2# linkage protection control module is controlled to switch off a switch circuit, a 1# to 2# rectifying unit and an inverting unit of the 2# intermediate frequency power supply stop running, and the 2# intermediate frequency power supply stops running.
As a second implementation manner of the embodiment, when the +22V1 power output by the 1# linkage protection control module switching circuit has a short circuit or open circuit fault, the corresponding power switch module ICA1 feeds back to the pin P1.6 of the single chip microcomputer through the pin st, and the single chip microcomputer controls the power switches ICA1 to ICA3 to stop outputting the power from +22V1 to +22V3 through the pins P1.5, P1.1 and P3.7, so that the 1# to 2# rectifying units and the inverter units of the 1# intermediate frequency power supply stop operating, and the 1# intermediate frequency power supply stops operating. The pin P3.0 of the singlechip outputs high level at the same time, so that the optocoupler UF2 is switched on, namely, the transmission end of the 1# intermediate frequency power supply signal outputs a low level fault signal to the linkage signal line.
And the signal transmission end of the 2# linkage protection control module receives a fault signal and controls the optical coupler UF1 of the 2# linkage protection control module to be switched on, so that the singlechip of the 2# linkage protection control module is controlled to switch off the 1# to 2# rectifying unit and the inverting unit of the 2# intermediate frequency power supply to stop running, and the 2# intermediate frequency power supply stops running.
The intermediate frequency power supply linkage protection control system avoids the problems that one intermediate frequency power supply generates overcurrent, overvoltage and power phase loss or a short circuit or open circuit of a power supply at a control end of a rectification or inversion unit occurs in the actual use process of the intermediate frequency power supply system, and the other intermediate frequency power supply normally operates to cause the intermediate frequency power supply which is shut down to bear high voltage, so that a large number of electrical elements are burnt out.
The intermediate frequency power supply linkage protection control system in the embodiment has the advantages of simple circuit and connection relation, small number of components and parts required by each linkage protection control module, low cost, strong operability, reliable control and good economical efficiency and practicability.
The above description of the embodiments is only intended to help understand the method of the present invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a medium frequency power supply linkage protection control system which characterized by: the system comprises at least two linkage protection control modules with the same circuit structure, wherein each linkage protection control module is coupled with a corresponding intermediate frequency power supply main board and is coupled with other linkage protection control modules through linkage signal lines;
each linkage protection control module comprises a conversion unit and a control unit;
the conversion unit comprises a signal conversion circuit, a power supply access end of the signal conversion circuit is coupled with a power supply, a first signal transmission end is coupled with a module corresponding to a fault signal output end of the intermediate frequency power supply main control board and the linkage signal line, and a second signal input end and a signal output end are coupled with the control unit and used for converting a fault signal input by the first signal transmission end into a signal output end and inputting the signal output end into the control unit or receiving a fault signal output by the control unit through the second signal input end and converting the fault signal into the first signal transmission end;
the control unit comprises a control circuit and a plurality of stages of switch circuits which are coupled with the control circuit and have the same circuit structure, each stage of switch circuit is respectively coupled with a rectification or inversion unit control end of a module corresponding to the intermediate frequency power supply, and the control circuit is used for controlling the switch circuit to switch off the power supply of the rectification or inversion unit control end after receiving a fault signal output by the signal conversion circuit or sending the fault signal to the conversion circuit after receiving the fault signal output by any stage of switch circuit.
2. The linked protection control system of the intermediate frequency power supply as claimed in claim 1, wherein: the signal conversion circuit comprises optical couplers UF 1-UF 2 and a resistor R1; one end of the resistor R1 serving as a first power supply access end is coupled to a power supply VCC1, and the other end of the resistor R1 is coupled to a first input end of the optocoupler UF 1; a second input end of the optical coupler UF1 and a first output end of the optical coupler UF2 are coupled to be used as a first signal transmission end, a first output end of the optical coupler UF1 is coupled to be used as a signal output end and is coupled to a control circuit, and a second output end is coupled to a signal ground; a first input terminal of the optical coupler UF2 is coupled to the control circuit as a second signal input terminal, a second input terminal is coupled to the signal ground, and a second output terminal is coupled to the power ground as a second power input terminal.
3. The linked protection control system of the intermediate frequency power supply according to claim 1 or 2, characterized in that: the control circuit comprises a singlechip IC5, resistors R2-R3, capacitors C1-C3, a capacitor EC1, a voltage stabilizing module IC1 and a crystal oscillator CY 1; a VCC pin of the single chip IC5 is coupled to a pin Vout of a voltage stabilization module IC1, a pin P3.4 is coupled to a signal output terminal of the signal conversion circuit, a pin P3.0 is coupled to a second signal input terminal of the signal conversion circuit through a resistor R3, pins P1.5, P1.1 and P3.7 are coupled to a signal input terminal of the switch circuit, pins P1.6, P1.2 and P1.0 are coupled to a fault signal output terminal of the switch circuit, respectively, a RST pin is coupled to a signal ground through a resistor R2, a pin XTAL1 is coupled to the signal ground through a capacitor C2, a pin XTAL2 is coupled to the signal ground through a capacitor C1, and a pin GND is coupled to the signal ground; the crystal oscillator CY1 is coupled between the XTAL1 pin and the XTAL2 pin of the singlechip IC 5; a pin VIN of the voltage stabilizing module IC1 is coupled with a +22V power supply, and a GND pin is used as a signal ground reference end; the capacitor C3 and the capacitor EC1 are coupled in parallel between the pins VIN and GND of the regulator module IC 1.
4. The linked protection control system of the intermediate frequency power supply as claimed in claim 3, wherein: each stage of switch circuit comprises a power switch module ICAn, an in pin of the power switch module ICAn is used as a signal input end and coupled with a singlechip of the control circuit, a st pin is used as a fault signal output end and coupled with the singlechip of the control circuit, a Vbb pin is coupled with a +22V power supply, an out pin is used as a power output end and coupled with a power supply of a control end of a rectifying or inverting unit of the intermediate frequency power supply, and a gnd pin is coupled with a signal ground.
5. The linked protection control system of the intermediate frequency power supply as claimed in claim 3, wherein: the linkage protection control module further comprises a first indicator light unit used for indicating the working state of the intermediate frequency power supply, and the first indicator light unit comprises resistors R4, R7-R8, an optocoupler UF3, capacitors C4-C5, a bidirectional thyristor T1 and a signal light L2; a first input end of the optocoupler UF3 is coupled with a P3.3 pin of the singlechip IC5 through a resistor R7, a second input end of the optocoupler UF3 is coupled with a signal ground, a first output end of the optocoupler UF3 is coupled with one end of a resistor R4, and a second output end of the optocoupler UF is coupled with one end of the resistor R8, one end of a capacitor C5 and a control end of a bidirectional thyristor T1; the other end of the resistor R4, the first terminal of the triac T1 and one end of the capacitor C4 are coupled to one end of the signal lamp L2, the other end of the resistor R8, the other end of the capacitor C5, the second terminal of the triac T1 and the other end of the capacitor C4 are coupled to a first power supply terminal of the signal lamp L2, and the other end of the signal lamp L2 is coupled to a second power supply terminal.
6. The linked protection control system of the intermediate frequency power supply as claimed in claim 3, wherein: the linkage protection control module further comprises a second indicator light unit used for indicating the working state of the linkage protection control module, the second indicator light unit comprises a resistor R5 and a light-emitting diode L1, one end of the resistor R5 is coupled with a P1.7 pin of the singlechip IC5, the other end of the resistor R5 is coupled with the anode of the light-emitting diode L1, and the cathode of the light-emitting diode L1 is coupled with a signal ground.
7. The linked protection control system of the intermediate frequency power supply as claimed in claim 4, wherein: the linkage protection control module further comprises a third indicator light unit used for indicating the working state of the switch unit, the third indicator light unit comprises a resistor Ran and a light emitting diode LAn, and the resistor Ran and the light emitting diode LAn are coupled between the out pin and the gnd pin of the power switch module LCAn in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922469532.0U CN211239325U (en) | 2019-12-31 | 2019-12-31 | Intermediate frequency power supply linkage protection control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922469532.0U CN211239325U (en) | 2019-12-31 | 2019-12-31 | Intermediate frequency power supply linkage protection control system |
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| CN211239325U true CN211239325U (en) | 2020-08-11 |
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| CN201922469532.0U Active CN211239325U (en) | 2019-12-31 | 2019-12-31 | Intermediate frequency power supply linkage protection control system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311200 Pu Yang Zhen Jian Shan Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Shenggang Mechanical&Electrical Co.,Ltd. Address before: 311200 Pu Yang Zhen Jian Shan Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Shenggang Electrical Appliance Co.,Ltd. |