CN211236634U - Linkage protection control system - Google Patents
Linkage protection control system Download PDFInfo
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- CN211236634U CN211236634U CN201922486313.3U CN201922486313U CN211236634U CN 211236634 U CN211236634 U CN 211236634U CN 201922486313 U CN201922486313 U CN 201922486313U CN 211236634 U CN211236634 U CN 211236634U
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Abstract
The utility model discloses a linkage protection control system, including the first and second linkage protection control module that circuit structure is the same, first linkage protection control module includes conversion unit and the control unit, and conversion unit includes diode VD5, resistance R7 and opto-coupler UF1, and VD5 positive pole is coupled with the mainboard of first intermediate frequency power supply, and the negative pole is coupled with one end and the second linkage protection control module of R7; UF1 has a first input terminal coupled to the other end of R7, and a second input terminal connected to ground; the control unit comprises at least 3 stages of control circuits which are coupled and have the same circuit structure, each stage of control circuit comprises a diode VDn, a MOS tube VTn and a resistor Ran, the source electrode of the VTn is coupled with a power supply and a first output end of UF1, and the drain electrode of the VTn is coupled with the control end of the rectifying/inverting unit of the first intermediate frequency power supply; the anode of VDn is coupled with the second output end of UF1, and the cathode of VDn is coupled with one end of Ran and the gate of VTn; the other end of Ran is grounded. The second linkage protection control module is coupled with a mainboard of the second intermediate frequency power supply. The utility model discloses the relation of connection is simple, and maneuverability is strong, and control is reliable.
Description
Technical Field
The patent of the utility model relates to an intermediate frequency power application mainly is the protection control to intermediate frequency power.
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 in practical application one medium frequency power supply trouble appears often and jumps the machine, and another medium frequency power supply normal operating, the medium frequency power supply of trouble 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 linkage protection control system of control.
The utility model discloses take following technical scheme to realize:
a linkage protection control system comprises a first linkage protection control module and a second linkage protection control module which have the same circuit structure. The first linkage protection control module comprises a conversion unit and a control unit, the conversion unit comprises a diode VD5, a resistor R7 and an optical coupler UF1, the anode of the diode VD5 is used as a first signal end and coupled with a main board fault signal of a first intermediate-frequency power supply, the cathode of the diode VD5 is coupled with one end of a resistor R7 and is used as a second signal end and coupled with a second signal end of a second linkage protection control module, the other end of the resistor R7 is coupled with a first input end of an optical coupler UF1, and the second input end of the optical coupler UF1 is grounded. The control unit comprises at least 3 stages of control circuits which are coupled and have the same circuit structure, each stage of control circuit comprises a diode VDn, a MOS tube VTn and a resistor Ran, the source electrode of the MOS tube VTn is used as an input end to be coupled with a +22V power supply and a first output end of an optical coupler UF1, and the drain electrode is used as an output end to be coupled with a power supply of a control end of a rectifying/inverting unit of the first intermediate frequency power supply. The anode of the diode VDn is coupled to the second output terminal of the optocoupler UF1, and the cathode is coupled to one end of the resistor Ran and the gate of the MOS transistor VTn. The other end of the resistor Ran is grounded. And a first signal end of the second linkage protection control module is coupled with a mainboard fault signal of the second intermediate frequency power supply.
Furthermore, the conversion unit in the linkage protection control system further comprises a relay KA1, a light emitting diode HL4, resistors R8-R9 and a diode VD4, wherein one end of the resistor R8 is coupled to an anode of the diode VD5, the other end of the resistor R8 is coupled to one end of the relay KA1, an anode of the light emitting diode HL4 and a cathode of the diode VD4, a cathode of the light emitting diode HL4 is coupled to one end of the resistor R9, and the other end of the relay KA1, an anode of the diode VD4 and the other end of the resistor R9 are coupled to the ground; the relay is an electromagnetic relay and is used for controlling the state of an indicator light of the medium-frequency power supply system.
Furthermore, each stage of control circuit of the control unit in the linkage protection control system further comprises a capacitor Cn and a voltage regulator tube VZn, wherein one end of the capacitor Cn is coupled to the anode of the voltage regulator tube VZn and the gate of the MOS tube VTn, and the other end of the capacitor Cn is coupled to the cathode of the voltage regulator tube VZn and the source of the MOS tube VTn.
Furthermore, each stage of control circuit of the control unit in the linkage protection control system further comprises a light emitting diode HLn and a resistor Rbn, wherein the anode of the light emitting diode HLn is coupled with the drain of the MOS transistor VTn, the cathode of the light emitting diode HLn is coupled with one end of the resistor Rbn, and the other end of the resistor Rbn is grounded.
The utility model has the following technical advantages or beneficial effects:
the linkage protection control system in the scheme has the characteristics of simple connection relation, simple circuit, small number of required components, low cost, strong operability, reliable control and the like.
Drawings
Fig. 1 is a schematic circuit diagram of a first linkage protection control module according to the present invention.
Fig. 2 is a schematic diagram of a connection relationship of an embodiment of the linkage protection control system 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.
As shown in fig. 1, the linkage protection control module in the linkage protection control system of the present embodiment includes a conversion unit and a control unit. The conversion unit comprises diodes VD 4-VD 5, resistors R7-R9, a relay KA1, an optical coupler UF1 and a light-emitting diode HL 4. An anode of the diode VD5 and one end of the resistor R8 are coupled to the terminal J2, a cathode of the diode VD 3662 and one end of the resistor R7 are coupled to the terminal J1, the other end of the resistor R7 is coupled to an anode of an input terminal of the optocoupler UF1, the other end of the resistor R8 is coupled to one end of the relay KA1, an anode of the light emitting diode HL4, a cathode of the diode VD4, the other end of the relay KA1, an anode of the diode VD4, one end of the resistor R9 and a cathode of an input terminal of the optocoupler UF1 are coupled to ground, and a cathode of the light emitting diode HL4 is. A first output terminal of the optical coupler UF1 is coupled to the +22V power supply, and a second output terminal is coupled to an input terminal of the control unit. The relay is an electromagnetic relay and is used for controlling the state of an indicator light of the medium-frequency power supply system.
The control unit comprises at least 3 stages of control circuits which are coupled and have the same circuit structure, each stage of control circuit comprises a diode VDn, a capacitor Cn, a MOS tube VTn, a voltage regulator VZn, a light-emitting diode HLn, resistors Ran and Rbn, a first output end of an optical coupler UF1, one end of the capacitor Cn, the cathode of the voltage regulator VZn and the source electrode of the MOS tube VTn are coupled with a +22V power supply as input ends, the anode of the diode VDn is coupled with a second output end of the optical coupler, the cathode of the diode VDn, the other end of the capacitor Cn, the anode of the voltage regulator VZn, one end of the resistor Ran and the grid electrode of the MOS tube VTn, the drain electrode of the MOS tube VTn is coupled with the power supply of the control end of the intermediate frequency power supply rectifying/inverting unit and the anode of the light-emitting diode HLn as output ends, the cathode of the light-emitting diode HLn is coupled with one end of. In practical application, if each intermediate frequency power supply in the power supply system comprises more than 2 rectifier units, the number of control circuits in the first linkage protection control module and the second linkage protection control module in the linkage protection control system is correspondingly adjusted to realize the protection of the intermediate frequency power supply.
The control unit in the embodiment comprises 3 control circuits with the same circuit structure, and the control unit comprises diodes VD 1-VD 3, capacitors C1-C3, resistors Ra 1-Ra 3, Rb 1-Rb 3, MOS transistors VT 1-VT 3, voltage-stabilizing tubes VZ 1-VZ 3 and light-emitting diodes HL 1-HL 3.
The 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 first linkage protection control module and the second 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 a specific implementation manner of the embodiment, the terminal J1 of the 1# linkage protection control module is coupled to the terminal J1 of the 2# linkage protection control module, the terminal J2 and the terminals +22V1 to +22V3 of the 1# linkage protection control module are coupled to the main control board of the 1# intermediate frequency power supply, the 1# rectifying unit of the 1# intermediate frequency power supply, the 2# rectifying unit of the 1# intermediate frequency power supply and the inverter unit of the 1# intermediate frequency power supply respectively, and the terminal J2 and the terminals +22V1 to +22V3 of the 2# linkage protection control module are coupled to the main control board of the 2# intermediate frequency power supply, the 1# rectifying unit of the 2# intermediate frequency power supply, the 2# rectifying unit of the 2# intermediate frequency power supply and the inverter unit respectively.
When the 1# intermediate frequency power supply has a fault, the 1# intermediate frequency power supply main control board sends a fault signal to a terminal J2 of the 1# linkage protection control module, the fault signal is divided into two paths after a diode VD5 of the 1# linkage protection control module is switched on, one path of the fault signal is output to a J1 of the 2# linkage protection control module through a J1 of the 1# linkage protection control module, the other path of the fault signal controls a light-emitting indicator HL4 of the 1# linkage protection control module to be normally on, a relay KA1 acts and an optical coupler UF1 is switched on, contacts of the relay KA1 are coupled with terminals K1 and K2 to control the state of the indicator light of the intermediate frequency power supply system, MOS tubes VT 1-VT 3 of the optical coupler switching-on control module are switched off, light-emitting diodes HL 1-HL 3 are switched off, power supplies at the control ends of the 1# intermediate frequency power supply rectifier unit and an inverter unit are cut off, and the 1#, and stopping the 1# intermediate frequency power supply.
The fault signal output to the terminal J1 of the 2# linkage protection control module controls the optical coupler of the 2# linkage protection control module to be switched on, thereby controlling the gate of the MOS tube VT 1-VT 3 of the 2# linkage protection control module to be switched off and the light-emitting diodes HL 1-HL 3 to be extinguished, stopping the 1# to 2# rectifying unit and the inverter unit of the 2# intermediate frequency power supply, and stopping the 2# intermediate frequency power supply.
When the 2# intermediate frequency power supply has a fault, the 2# intermediate frequency power supply main control board sends a fault signal to a terminal J2 of a 2# linkage protection control module, the fault signal is divided into two paths after a diode VD5 of the 1# linkage protection control module is switched on, one path of the fault signal is output to a J1 of the 1# linkage protection control module through a J1 of the 2# linkage protection control module, the other path of the fault signal controls a light-emitting indicator HL4 of the 2# linkage protection control module to be normally on, a relay KA1 acts and an optical coupler UF1 is switched on, contacts of the relay KA1 are coupled with terminals K1 and K2 to control the state of the indicator light of the intermediate frequency power supply system, MOS tubes VT 1-VT 3 of the optical coupler switching-on control module are switched off, light-emitting diodes HL 1-HL 3 are switched off, the power supplies of a 2# intermediate frequency power supply rectifying unit and an inverter unit control end are cut off, and the 1# intermediate, and stopping the 2# intermediate frequency power supply.
The fault signal output to the terminal J1 of the 1# linkage protection control module controls the optical coupler of the 1# linkage protection control module to be switched on, thereby controlling the gate of the MOS tube VT 1-VT 3 of the 1# linkage protection control module to be switched off and the indicator lamps HL 1-HL 3 to be extinguished, the 1# to 2# rectifier unit and the inverter unit of the 1# intermediate frequency power supply to stop running, and the 1# intermediate frequency power supply to be stopped.
The linkage protection control system avoids the condition that one intermediate frequency power supply fails in the actual use process of the intermediate frequency power supply system, and the other intermediate frequency power supply normally operates to cause the failed intermediate frequency power supply to bear high voltage, so that a large number of electrical elements are burnt out.
The linkage protection control system in the embodiment has the characteristics of simple circuit and connection relation, small number of components, low cost, strong operability, reliable control and the like.
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 (4)
1. A linkage protection control system characterized by: the device comprises a first linkage protection control module and a second linkage protection control module which have the same circuit structure; the first linkage protection control module comprises a conversion unit and a control unit; the conversion unit comprises a diode VD5, a resistor R7 and an optical coupler UF1, wherein the anode of the diode VD5 is used as a first signal end and coupled with a main board fault signal of a first intermediate frequency power supply, and the cathode of the diode VD5 is coupled with one end of the resistor R7 and is used as a second signal end and coupled with a second signal end of the second linkage protection control module; the other end of the resistor R7 is coupled with a first input end of the optical coupler UF1, and a second input end of the optical coupler UF1 is grounded; the control unit comprises at least 3 stages of control circuits which are coupled and have the same circuit structure, each stage of control circuit comprises a diode VDn, an MOS tube VTn and a resistor Ran, the source electrode of the MOS tube VTn is used as the input end to be coupled with a +22V power supply and the first output end of the optical coupler UF1, and the drain electrode is used as the output end to be coupled with the power supply of the control end of the rectifying/inverting unit of the first intermediate frequency power supply; the anode of the diode VDn is coupled to the second output end of the optocoupler UF1, and the cathode of the diode VDn is coupled to one end of the resistor Ran and the gate of the MOS transistor VTn; the other end of the resistor Ran is grounded; and a first signal end of the second linkage protection control module is coupled with a mainboard fault signal of the second intermediate frequency power supply.
2. The coordinated protection control system according to claim 1, wherein: the conversion unit further comprises a relay KA1, a light emitting diode HL4, resistors R8-R9 and a diode VD4, one end of the resistor R8 is coupled with the anode of the diode VD5, the other end of the resistor R8 is coupled with one end of the relay KA1, the anode of the light emitting diode HL4 and the cathode of the diode VD4, the cathode of the light emitting diode HL4 is coupled with one end of the resistor R9, and the other end of the relay KA1, the anode of the diode VD4 and the other end of the resistor R9 are coupled with the ground; the relay is an electromagnetic relay and is used for controlling the state of an indicator light of the medium-frequency power supply system.
3. The link protection control system according to claim 1 or 2, wherein: each stage of control circuit of the control unit further comprises a capacitor Cn and a voltage regulator tube VZn, one end of the capacitor Cn is coupled with the anode of the voltage regulator tube VZn and the grid electrode of the MOS tube VTn, and the other end of the capacitor Cn is coupled with the cathode of the voltage regulator tube VZn and the source electrode of the MOS tube VTn.
4. The coordinated protection control system according to claim 3, wherein: each stage of control circuit of the control unit further includes a light emitting diode HLn and a resistor Rbn, an anode of the light emitting diode HLn is coupled to a drain of the MOS transistor VTn, a cathode of the light emitting diode HLn is coupled to one end of the resistor Rbn, and the other end of the resistor Rbn is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922486313.3U CN211236634U (en) | 2019-12-30 | 2019-12-30 | Linkage protection control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922486313.3U CN211236634U (en) | 2019-12-30 | 2019-12-30 | Linkage protection control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211236634U true CN211236634U (en) | 2020-08-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922486313.3U Active CN211236634U (en) | 2019-12-30 | 2019-12-30 | Linkage protection control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211236634U (en) |
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2019
- 2019-12-30 CN CN201922486313.3U patent/CN211236634U/en active Active
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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. |