CN112994674A - High-power electronic switch - Google Patents
High-power electronic switch Download PDFInfo
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- CN112994674A CN112994674A CN202110180778.5A CN202110180778A CN112994674A CN 112994674 A CN112994674 A CN 112994674A CN 202110180778 A CN202110180778 A CN 202110180778A CN 112994674 A CN112994674 A CN 112994674A
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- main control
- preset
- control board
- rotating speed
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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
- H03K17/687—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 the devices being field-effect transistors
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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
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Abstract
The invention relates to a high-power electronic switch, which relates to the technical field of electronic switches and is characterized in that a thyristor is controlled by the size of a three-phase current value monitored by an overcurrent protector in real time to turn off and turn on a circuit, a main control board controls the thyristor to turn off and turn on the circuit by the size of a radiator temperature monitored by a temperature relay in real time, when the main control board controls the rotating speed of a cooling fan, the main control board selects the rotating speed of the cooling fan according to the size of the three-phase current value monitored by the overcurrent protector in real time, and meanwhile, the main control board controls different numbers of the cooling fans to work and the circulating work of cooling oil in a switch shell according to the size of the radiator temperature monitored by the temperature relay in real time. The switch of the invention effectively improves the heat dissipation efficiency by controlling the rotating speed and the working number of the heat dissipation fan, thereby effectively prolonging the service life.
Description
Technical Field
The invention relates to the technical field of electronic switches, in particular to a high-power electronic switch.
Background
The contact type switch generally refers to a device using a contactor as a switch, the switch has an obvious physical breakpoint, and the connection and the disconnection of the physical breakpoint are realized by generating electromagnetic force by electrifying a coil or generating mechanical force by storing energy by a spring mechanism, so that the closing and the breaking of the contactor are realized, and the purpose of controlling the electrification or the power loss of electrical equipment is achieved. The switch has the advantages of simple structure and easy realization of a control loop, is low in price and easy to accept by general users, but is low in control response speed due to the limitation of a mechanical structure, has certain limitation on mechanical service life, is not suitable for the requirements of long-term, frequent and quick switching occasions, can generate current impact in the instant of switching on and switching off, is easy to generate electric arcs, and is low in safety and control characteristics.
The contactless switch is a strong electric circuit switch using bidirectional thyristor as main switch device, and has no obvious physical breakpoint, and it can make its internal circuit be switched on or off by means of electric signal with certain frequency and magnitude applied to its control electrode so as to implement switching on and off of thyristor and attain the goal of controlling electric equipment to be powered on or powered off. However, the thyristor has high power and generates a large amount of heat during operation, so that the contactless switch has short service life.
Disclosure of Invention
Therefore, the invention provides a high-power electronic switch which is used for overcoming the problem that in the prior art, the service life is short because the thyristor cannot be cooled by monitoring the current value and the temperature value in the circuit in real time.
To achieve the above object, the present invention provides a high power electronic switch, comprising:
the thyristor is used for controlling the on and off of the circuit;
the main control board sends an execution instruction to the thyristor by monitoring the working state of each part;
the control power supply is used for providing power for the main control panel circuit and filtering an external power supply;
the overcurrent protector is used for monitoring a current value in real time;
the radiator is used for radiating heat for the thyristor;
the heat dissipation fans are used for accelerating the heat dissipation speed of the heat dissipater, and the number of the heat dissipation fans is three;
the temperature relay is used for monitoring the temperature of the radiator in real time;
the thyristor cooling device comprises a switch shell, a circulating pump and a thyristor, wherein the switch shell is used for assembling all parts together, a cavity is arranged on the side wall of the shell and is connected with the circulating pump, cooling oil is filled in the cavity, the circulating pump is used for controlling the cooling oil to circulate, and the cooling oil is used for dissipating heat of the thyristor;
when the switch works, the main control board controls the thyristor to switch off and on a circuit through the magnitude of a three-phase current value monitored by the overcurrent protector in real time, meanwhile, the main control board controls the thyristor to switch off and on the circuit through the magnitude of the radiator temperature monitored by the temperature relay in real time, when the main control board controls the rotating speed of the cooling fan, the main control board selects the rotating speed of the cooling fan according to the magnitude of the three-phase current value monitored by the overcurrent protector in real time, and meanwhile, the main control board controls different numbers of the cooling fans to work and the circulating work of cooling oil in the switch shell according to the magnitude of the radiator temperature monitored by the temperature relay in real time;
the main control board is internally provided with a first preset fan rotating speed V1, a second preset fan rotating speed V2, a third preset fan rotating speed V3 and a fourth preset fan rotating speed V4, wherein the preset fan rotating speeds are gradually increased in sequence, V1 is more than V2 and more than V3 is more than V4; the main control board is also provided with a first preset cooling oil circulation speed S1, a second preset cooling oil circulation speed S2, a third preset cooling oil circulation speed S3 and a fourth preset cooling oil circulation speed S4, wherein the preset cooling oil circulation speeds are gradually increased in sequence, and S1 is more than S2 and more than S3 and more than S4;
when the main control panel adopts the cooling oil circulation speed, the main control panel compares the fan rotating speed V with each preset fan rotating speed, and selects the corresponding cooling oil circulation speed according to the comparison result:
when V is more than or equal to V1 and is less than V2, S1 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V2 and is less than V3, S2 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V3 and is less than V4, S3 is selected as the cooling oil circulation speed by the main control board;
when V4 is less than or equal to V, the main control board selects S4 as the cooling oil circulation speed.
Further, the main control board is also provided with a maximum three-phase current value Amax and a maximum radiator temperature Tmax, and when the three-phase current value A monitored by the overcurrent protector in real time is not less than Amax or the radiator temperature T monitored by the temperature relay in real time is not less than Tmax, the main control board controls the thyristor to disconnect the circuit.
Furthermore, a first preset three-phase current value A1, a second preset three-phase current value A2, a third preset three-phase current value A3 and a fourth preset three-phase current value A4 are further arranged in the main control board, the preset three-phase current values are gradually increased in sequence, and A1 is more than A2 and more than A3 is more than A4 and more than Amax;
when the main control panel selects the rotating speed of the cooling fan, the main control panel compares the three-phase current value A monitored by the overcurrent protector in real time with each preset three-phase current value, and selects a corresponding fan rotating speed according to a comparison result:
when A is greater than or equal to A1 and is less than A2, V1 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A2 and is less than A3, V2 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A3 and is less than A4, V3 is selected as the rotating speed of the fan by the main control board;
when A4 is not more than A, the main control board selects V4 as the rotating speed of the fan.
Furthermore, a first preset input voltage U1, a second preset input voltage U2, a third preset input voltage U3 and a fourth preset input voltage U4 are further arranged in the main control board, and the preset input voltages are gradually increased in sequence, wherein U1 is more than U2 and more than U3 is more than U4; the main control board is also provided with a first preset three-phase current value adjusting coefficient m1, a second preset three-phase current value adjusting coefficient m2, a third preset three-phase current value adjusting coefficient m3 and a fourth preset three-phase current value adjusting coefficient m4, wherein the preset three-phase current value adjusting coefficients are gradually increased in sequence, and the preset three-phase current value adjusting coefficients are more than 0 and more than m1 and more than m2 and more than 1 and more than m3 and more than m 4;
when the main control board adjusts a preset ith preset three-phase current value Ai, setting i to be 1,2,3 and 4, comparing an input voltage U with each preset input voltage by the main control board, and selecting a corresponding three-phase current value adjusting coefficient to adjust Ai according to a comparison result:
when U is less than U1, the main control board selects m1 to adjust Ai;
when U1 is more than or equal to U and less than U2, the main control board selects m2 to adjust Ai;
when U2 is more than or equal to U and less than U3, no adjustment is carried out;
when U3 is more than or equal to U and less than U4, the main control board selects m3 to adjust Ai;
when U4 is not more than U, the main control board selects m4 to adjust Ai;
when the main control board selects the jth preset three-phase current value adjusting coefficient mj to adjust Ai, setting j to be 1,2,3 and 4, and setting Ai' to be Ai multiplied by mj after the three-phase current value is adjusted.
Further, a first preset radiator temperature T1, a second preset radiator temperature T2, a third preset radiator temperature T3 and a fourth preset radiator temperature T4 are further arranged in the main control board, the preset radiator temperatures are gradually increased in sequence, and T1 is more than T2 and more than T3 and more than T4 and more than Tmax; the main control board is also provided with a first preset fan rotating speed regulating coefficient a1, a second preset fan rotating speed regulating coefficient a2, a third preset fan rotating speed regulating coefficient a3 and a fourth preset fan rotating speed regulating coefficient a4, and the preset fan rotating speed regulating coefficients are gradually increased in sequence, wherein a is more than 1 and more than a1 and more than a2 and more than a3 and more than a 4;
when the main control panel presets fan rotational speed Vi for use and adjusts, set for i ═ 1,2,3,4, the main control panel will temperature relay real-time supervision's radiator temperature T and each predetermine the radiator temperature and compare to select for use corresponding fan rotational speed adjustment coefficient to adjust Vi according to the comparison result:
when T1 is more than or equal to T and less than T2, the main control board selects a1 to regulate Vi;
when T2 is more than or equal to T and less than T3, the main control board selects a2 to regulate Vi;
when T3 is more than or equal to T and less than T4, the main control board selects a3 to regulate Vi;
when T4 is less than or equal to T, the main control board selects a4 to adjust Vi;
when the main control board selects the jth preset fan rotating speed adjusting coefficient aj to adjust Vi, j is set to be 1,2,3 and 4, and the adjusted fan rotating speed is Vi ', and Vi' is set to be Vi multiplied aj.
Further, a first preset radiator area S1, a second preset radiator area S2, a third preset radiator area S3 and a fourth preset radiator area S4 are further arranged in the main control board, and the preset radiator areas are gradually increased in sequence, wherein S1 is more than S2 and more than S3 is more than S4; the main control board is also provided with a first preset fan rotating speed correction coefficient n1, a second preset fan rotating speed correction coefficient n2, a third preset fan rotating speed correction coefficient n3 and a fourth preset fan rotating speed correction coefficient n4, wherein the preset fan rotating speed correction coefficients are gradually increased in sequence, and n1 is more than 0 and n2 is more than 1 and n3 is more than n 4;
when the main control board corrects the adjusted ith preset fan rotating speed Vi ', the main control board compares the radiator area S with each preset radiator area, and selects a corresponding fan rotating speed correction coefficient to correct the Vi' according to the comparison result:
when S is less than S1, the main control board selects n4 to correct Vi';
when S1 is not less than S < S2, the main control board selects n3 to correct Vi';
when S2 is not more than S < S3, no correction is carried out;
when S3 is not less than S < S4, the main control board selects n2 to correct Vi';
when S4 is not more than S, the main control board selects n1 to correct Vi';
when the main control board selects the j-th preset fan rotating speed correction coefficient nj to correct Vi ', j is set to be 1,2,3 and 4, the corrected fan rotating speed is Vi ", and Vi is set to be Vi' × nj.
Further, when the main control board controls the cooling fan to work, the main control board compares the radiator temperature T monitored by the temperature relay in real time with each preset radiator temperature, and controls the cooling fan to work according to the comparison result:
when T is more than or equal to T1 and less than T2, the main control board controls 1 heat radiation fan to work;
when T is more than or equal to T2 and less than T3, the main control board controls 2 cooling fans to work;
and when T is more than or equal to T3 and less than T4, the main control board controls the 3 cooling fans to work.
Further, when the temperature T of the radiator monitored by the temperature relay in real time is larger than or equal to T4, the main control board controls the switch shell to circulate cooling oil.
Compared with the prior art, the switch has the advantages that the switch can be used for switching off and switching on a circuit through the real-time monitoring of the three-phase current value and the temperature of the radiator, so that the safety and the sensitivity of the switch are effectively improved, meanwhile, the heat radiation efficiency is effectively improved by controlling the rotating speed and the working quantity of the heat radiation fan, and the service life is further effectively prolonged.
Furthermore, the main control board controls the on and off of the circuit in real time by setting the maximum three-phase current value Amax and the maximum radiator temperature Tmax, so that the safety of the switch is effectively improved, and the service life of the switch is further prolonged.
Furthermore, the main control board compares the three-phase current value A monitored by the overcurrent protector in real time with each preset three-phase current value to select the corresponding fan rotating speed, so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Furthermore, the main control board compares the input voltage U with each preset input voltage and selects a corresponding three-phase current value adjusting coefficient to adjust Ai, so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Furthermore, the main control board compares the radiator temperature T monitored by the temperature relay in real time with each preset radiator temperature, selects the corresponding fan rotating speed regulating coefficient to regulate Vi, effectively improves the heat dissipation efficiency, and further prolongs the service life.
Furthermore, the main control board compares the area S of the radiator with the area of each preset radiator and selects the corresponding fan rotating speed correction coefficient to correct Vi', so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Furthermore, the main control board compares the radiator temperature T monitored by the temperature relay in real time with each preset radiator temperature to control the cooling fan to work, so that the cooling efficiency is effectively improved, and the service life is further prolonged.
Further, when the temperature T of the radiator monitored by the temperature relay in real time is larger than or equal to T4, the main control board controls the switch shell to circulate cooling oil, so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Drawings
FIG. 1 is a plan view of a high power electronic switch according to an embodiment of the present invention;
fig. 2 is a perspective view of a high-power electronic switch according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the present invention provides a high power electronic switch, including:
the main control board 101 sends out an execution instruction to the thyristor 104 by monitoring the working state of each component;
the control power supply 102 is used for providing power for the main control panel 101 circuit, and as the main control panel 101 circuit is powered by a 24V direct current power supply, a field external power supply needs to be rectified by the control power supply 102, and meanwhile, the control power supply 102 filters the external power supply to eliminate interference;
the overcurrent protector 103 is used for monitoring a current value in real time;
the radiator 106 is used for radiating heat for the thyristor 104, the radiator 106 is made of aluminum profiles and has an opposite structure of a radiating channel, the thyristor 104 is fixed in the radiator 106, and the radiator 106 has a conductive function while conducting heat;
the number of the heat dissipation fans 107 is three, the heat dissipation fans 107 are installed at the bottom of the heat sink 106, and the heat dissipation fans 107 cool the heat sink 106 quickly by forced cold air;
a temperature relay 105 for monitoring the temperature of the heat sink 106 in real time, wherein the temperature relay 105 is installed on the heat sink 106;
the thyristor controlled switch comprises a switch shell 108, a cavity 109 and a circulating pump 110, wherein the switch shell 108 is used for assembling all the components together, the side wall of the switch shell 108 is provided with the cavity 109, the cavity 109 is connected with the circulating pump 110, cooling oil is filled in the cavity 109, the circulating pump 110 is used for controlling the cooling oil to circulate, and the cooling oil is used for dissipating heat of the thyristor 104;
when the switch works, the main control panel 101 controls the thyristor 104 to turn off and turn on the circuit through the magnitude of the three-phase current value monitored by the overcurrent protector 103 in real time, meanwhile, the main control panel 101 controls the thyristor 104 to turn off and turn on the circuit through the magnitude of the temperature of the radiator 106 monitored by the temperature relay 105 in real time, when the main control panel 101 controls the rotating speed of the heat dissipation fan 107, the main control panel 101 selects the rotating speed of the heat dissipation fan 107 according to the magnitude of the three-phase current value monitored by the overcurrent protector 103 in real time, and meanwhile, the main control panel 101 controls different quantities of the heat dissipation fans 107 to work and the circulation work of cooling oil inside the switch shell 108 according to the magnitude of the temperature of the radiator 106 monitored by the temperature relay 105 in real time.
Specifically, a first preset fan rotating speed V1, a second preset fan rotating speed V2, a third preset fan rotating speed V3 and a fourth preset fan rotating speed V4 are arranged in the main control board, the preset fan rotating speeds are gradually increased in sequence, and V1 is more than V2 and more than V3 is more than V4; the main control board is also provided with a first preset cooling oil circulation speed S1, a second preset cooling oil circulation speed S2, a third preset cooling oil circulation speed S3 and a fourth preset cooling oil circulation speed S4, wherein the preset cooling oil circulation speeds are gradually increased in sequence, and S1 is more than S2 and more than S3 and more than S4;
when the main control panel adopts the cooling oil circulation speed, the main control panel compares the fan rotating speed V with each preset fan rotating speed, and selects the corresponding cooling oil circulation speed according to the comparison result:
when V is more than or equal to V1 and is less than V2, S1 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V2 and is less than V3, S2 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V3 and is less than V4, S3 is selected as the cooling oil circulation speed by the main control board;
when V4 is less than or equal to V, the main control board selects S4 as the cooling oil circulation speed.
Specifically, the main control board 101 is further provided with a maximum three-phase current value Amax and a maximum radiator temperature Tmax, and when the three-phase current value a monitored by the overcurrent protector 103 in real time is greater than or equal to Amax, or the radiator 106 temperature T monitored by the temperature relay 105 in real time is greater than or equal to Tmax, the main control board 101 controls the thyristor 104 to turn off the circuit.
Specifically, the main control board is further provided with a first preset three-phase current value A1, a second preset three-phase current value A2, a third preset three-phase current value A3 and a fourth preset three-phase current value A4, wherein the preset three-phase current values are gradually increased in sequence, A1 is more than A2 and more than A3 is more than A4 and more than Amax;
when the main control panel selects the rotating speed of the cooling fan, the main control panel compares the three-phase current value A monitored by the overcurrent protector in real time with each preset three-phase current value, and selects a corresponding fan rotating speed according to a comparison result:
when A is greater than or equal to A1 and is less than A2, V1 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A2 and is less than A3, V2 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A3 and is less than A4, V3 is selected as the rotating speed of the fan by the main control board;
when A4 is not more than A, the main control board selects V4 as the rotating speed of the fan.
The main control board 101 compares the three-phase current value a monitored by the overcurrent protector 103 in real time with each preset three-phase current value, and selects a corresponding fan rotating speed, so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Specifically, a first preset input voltage U1, a second preset input voltage U2, a third preset input voltage U3 and a fourth preset input voltage U4 are further arranged in the main control board, and the preset input voltages are gradually increased in sequence, wherein U1 is more than U2 and more than U3 is more than U4; the main control board is also provided with a first preset three-phase current value adjusting coefficient m1, a second preset three-phase current value adjusting coefficient m2, a third preset three-phase current value adjusting coefficient m3 and a fourth preset three-phase current value adjusting coefficient m4, wherein the preset three-phase current value adjusting coefficients are gradually increased in sequence, and the preset three-phase current value adjusting coefficients are more than 0 and more than m1 and more than m2 and more than 1 and more than m3 and more than m 4;
when the main control board adjusts a preset ith preset three-phase current value Ai, setting i to be 1,2,3 and 4, comparing an input voltage U with each preset input voltage by the main control board, and selecting a corresponding three-phase current value adjusting coefficient to adjust Ai according to a comparison result:
when U is less than U1, the main control board selects m1 to adjust Ai;
when U1 is more than or equal to U and less than U2, the main control board selects m2 to adjust Ai;
when U2 is more than or equal to U and less than U3, no adjustment is carried out;
when U3 is more than or equal to U and less than U4, the main control board selects m3 to adjust Ai;
when U4 is not more than U, the main control board selects m4 to adjust Ai;
when the main control board selects the jth preset three-phase current value adjusting coefficient mj to adjust Ai, setting j to be 1,2,3 and 4, and setting Ai' to be Ai multiplied by mj after the three-phase current value is adjusted.
Specifically, a first preset radiator temperature T1, a second preset radiator temperature T2, a third preset radiator temperature T3 and a fourth preset radiator temperature T4 are further arranged in the main control board, the preset radiator temperatures are gradually increased in sequence, and T1 is more than T2 and more than T3 and more than T4 and more than Tmax; the main control board is also provided with a first preset fan rotating speed regulating coefficient a1, a second preset fan rotating speed regulating coefficient a2, a third preset fan rotating speed regulating coefficient a3 and a fourth preset fan rotating speed regulating coefficient a4, and the preset fan rotating speed regulating coefficients are gradually increased in sequence, wherein a is more than 1 and more than a1 and more than a2 and more than a3 and more than a 4;
when the main control panel presets fan rotational speed Vi for use and adjusts, set for i ═ 1,2,3,4, the main control panel will temperature relay real-time supervision's radiator temperature T and each predetermine the radiator temperature and compare to select for use corresponding fan rotational speed adjustment coefficient to adjust Vi according to the comparison result:
when T1 is more than or equal to T and less than T2, the main control board selects a1 to regulate Vi;
when T2 is more than or equal to T and less than T3, the main control board selects a2 to regulate Vi;
when T3 is more than or equal to T and less than T4, the main control board selects a3 to regulate Vi;
when T4 is less than or equal to T, the main control board selects a4 to adjust Vi;
when the main control board selects the jth preset fan rotating speed adjusting coefficient aj to adjust Vi, j is set to be 1,2,3 and 4, and the adjusted fan rotating speed is Vi ', and Vi' is set to be Vi multiplied aj.
The main control board 101 compares the radiator temperature T monitored in real time by the temperature relay 105 with each preset radiator temperature, selects the corresponding fan rotating speed adjusting coefficient to adjust Vi, effectively improves the heat dissipation efficiency, and further prolongs the service life.
Specifically, a first preset radiator area S1, a second preset radiator area S2, a third preset radiator area S3 and a fourth preset radiator area S4 are further arranged in the main control board, and the preset radiator areas are gradually increased in sequence, wherein S1 is more than S2, and S3 is more than S4; the main control board is also provided with a first preset fan rotating speed correction coefficient n1, a second preset fan rotating speed correction coefficient n2, a third preset fan rotating speed correction coefficient n3 and a fourth preset fan rotating speed correction coefficient n4, wherein the preset fan rotating speed correction coefficients are gradually increased in sequence, and n1 is more than 0 and n2 is more than 1 and n3 is more than n 4;
when the main control board corrects the adjusted ith preset fan rotating speed Vi ', the main control board compares the radiator area S with each preset radiator area, and selects a corresponding fan rotating speed correction coefficient to correct the Vi' according to the comparison result:
when S is less than S1, the main control board selects n4 to correct Vi';
when S1 is not less than S < S2, the main control board selects n3 to correct Vi';
when S2 is not more than S < S3, no correction is carried out;
when S3 is not less than S < S4, the main control board selects n2 to correct Vi';
when S4 is not more than S, the main control board selects n1 to correct Vi';
when the main control board selects the j-th preset fan rotating speed correction coefficient nj to correct Vi ', j is set to be 1,2,3 and 4, the corrected fan rotating speed is Vi ", and Vi is set to be Vi' × nj.
Specifically, when the main control board 101 controls the cooling fan 107 to operate, the main control board 101 compares the temperature T of the heat sink 106 monitored by the temperature relay 105 in real time with each preset heat sink temperature, and controls the cooling fan to operate according to a comparison result:
when T1 is more than or equal to T < T2, the main control board 101 controls 1 heat dissipation fan 107 to work;
when T2 is more than or equal to T < T3, the main control board 101 controls 2 cooling fans 107 to work;
when T3 is not less than T < T4, the main control board 101 controls 3 heat dissipation fans 107 to work.
The main control board 101 controls the heat dissipation fan 107 to work by comparing the radiator temperature T monitored by the temperature relay 105 in real time with each preset radiator temperature, so that the heat dissipation efficiency is effectively improved, and the service life is further prolonged.
Specifically, when the temperature T of the radiator 106 monitored by the temperature relay 105 in real time is equal to or greater than T4, the main control board 101 controls the switch housing 108 to circulate the cooling oil.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high power electronic switch, comprising:
the thyristor is used for controlling the on and off of the circuit;
the main control board sends an execution instruction to the thyristor by monitoring the working state of each part;
the control power supply is used for providing power for the main control panel circuit and filtering an external power supply;
the overcurrent protector is used for monitoring a current value in real time;
the radiator is used for radiating heat for the thyristor;
the heat dissipation fans are used for accelerating the heat dissipation speed of the heat dissipater, and the number of the heat dissipation fans is three;
the temperature relay is used for monitoring the temperature of the radiator in real time;
the thyristor cooling device comprises a switch shell, a circulating pump and a thyristor, wherein the switch shell is used for assembling all parts together, a cavity is arranged on the side wall of the shell and is connected with the circulating pump, cooling oil is filled in the cavity, the circulating pump is used for controlling the cooling oil to circulate, and the cooling oil is used for dissipating heat of the thyristor;
when the switch works, the main control board controls the thyristor to switch off and on a circuit through the magnitude of a three-phase current value monitored by the overcurrent protector in real time, meanwhile, the main control board controls the thyristor to switch off and on the circuit through the magnitude of the radiator temperature monitored by the temperature relay in real time, when the main control board controls the rotating speed of the cooling fan, the main control board selects the rotating speed of the cooling fan according to the magnitude of the three-phase current value monitored by the overcurrent protector in real time, and meanwhile, the main control board controls different numbers of the cooling fans to work and the circulation work of cooling oil in the switch shell according to the magnitude of the radiator temperature monitored by the temperature relay in real time;
the main control board is internally provided with a first preset fan rotating speed V1, a second preset fan rotating speed V2, a third preset fan rotating speed V3 and a fourth preset fan rotating speed V4, wherein the preset fan rotating speeds are gradually increased in sequence, V1 is more than V2 and more than V3 is more than V4; the main control board is also provided with a first preset cooling oil circulation speed S1, a second preset cooling oil circulation speed S2, a third preset cooling oil circulation speed S3 and a fourth preset cooling oil circulation speed S4, wherein the preset cooling oil circulation speeds are gradually increased in sequence, and S1 is more than S2 and more than S3 and more than S4;
when the main control panel adopts the cooling oil circulation speed, the main control panel compares the fan rotating speed V with each preset fan rotating speed, and selects the corresponding cooling oil circulation speed according to the comparison result:
when V is more than or equal to V1 and is less than V2, S1 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V2 and is less than V3, S2 is selected as the cooling oil circulation speed by the main control board;
when V is more than or equal to V3 and is less than V4, S3 is selected as the cooling oil circulation speed by the main control board;
when V4 is less than or equal to V, the main control board selects S4 as the cooling oil circulation speed.
2. The high-power electronic switch according to claim 1, wherein a maximum three-phase current value Amax and a maximum radiator temperature Tmax are further provided in the main control board, and when the three-phase current value A monitored by the overcurrent protector in real time is greater than or equal to Amax, or the radiator temperature T monitored by the temperature relay in real time is greater than or equal to Tmax, the main control board controls the thyristor to disconnect the circuit.
3. The high power electronic switch according to claim 2, wherein a first preset three-phase current value A1, a second preset three-phase current value A2, a third preset three-phase current value A3 and a fourth preset three-phase current value A4 are further provided in the main control board, and the preset three-phase current values are gradually increased in sequence, wherein A1 < A2 < A3 < A4 < Amax;
when the main control panel selects the rotating speed of the cooling fan, the main control panel compares the three-phase current value A monitored by the overcurrent protector in real time with each preset three-phase current value, and selects a corresponding fan rotating speed according to a comparison result:
when A is greater than or equal to A1 and is less than A2, V1 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A2 and is less than A3, V2 is selected as the rotating speed of the fan by the main control board;
when A is greater than or equal to A3 and is less than A4, V3 is selected as the rotating speed of the fan by the main control board;
when A4 is not more than A, the main control board selects V4 as the rotating speed of the fan.
4. The high power electronic switch according to claim 3, wherein a first preset input voltage U1, a second preset input voltage U2, a third preset input voltage U3 and a fourth preset input voltage U4 are further provided in the main control board, and the preset input voltages are gradually increased in sequence, wherein U1 < U2 < U3 < U4; the main control board is also provided with a first preset three-phase current value adjusting coefficient m1, a second preset three-phase current value adjusting coefficient m2, a third preset three-phase current value adjusting coefficient m3 and a fourth preset three-phase current value adjusting coefficient m4, wherein the preset three-phase current value adjusting coefficients are gradually increased in sequence, and the preset three-phase current value adjusting coefficients are more than 0 and more than m1 and more than m2 and more than 1 and more than m3 and more than m 4;
when the main control board adjusts a preset ith preset three-phase current value Ai, setting i to be 1,2,3 and 4, comparing an input voltage U with each preset input voltage by the main control board, and selecting a corresponding three-phase current value adjusting coefficient to adjust Ai according to a comparison result:
when U is less than U1, the main control board selects m1 to adjust Ai;
when U1 is more than or equal to U and less than U2, the main control board selects m2 to adjust Ai;
when U2 is more than or equal to U and less than U3, no adjustment is carried out;
when U3 is more than or equal to U and less than U4, the main control board selects m3 to adjust Ai;
when U4 is not more than U, the main control board selects m4 to adjust Ai;
when the main control board selects the jth preset three-phase current value adjusting coefficient mj to adjust Ai, setting j to be 1,2,3 and 4, and setting Ai' to be Ai multiplied by mj after the three-phase current value is adjusted.
5. The high power electronic switch according to claim 4, wherein a first preset radiator temperature T1, a second preset radiator temperature T2, a third preset radiator temperature T3 and a fourth preset radiator temperature T4 are further arranged in the main control board, and the preset radiator temperatures are gradually increased in sequence, wherein T1 < T2 < T3 < T4 < Tmax; the main control board is also provided with a first preset fan rotating speed regulating coefficient a1, a second preset fan rotating speed regulating coefficient a2, a third preset fan rotating speed regulating coefficient a3 and a fourth preset fan rotating speed regulating coefficient a4, and the preset fan rotating speed regulating coefficients are gradually increased in sequence, wherein a is more than 1 and more than a1 and more than a2 and more than a3 and more than a 4;
when the main control panel presets fan rotational speed Vi for use and adjusts, set for i ═ 1,2,3,4, the main control panel will temperature relay real-time supervision's radiator temperature T and each predetermine the radiator temperature and compare to select for use corresponding fan rotational speed adjustment coefficient to adjust Vi according to the comparison result:
when T1 is more than or equal to T and less than T2, the main control board selects a1 to regulate Vi;
when T2 is more than or equal to T and less than T3, the main control board selects a2 to regulate Vi;
when T3 is more than or equal to T and less than T4, the main control board selects a3 to regulate Vi;
when T4 is less than or equal to T, the main control board selects a4 to adjust Vi;
when the main control board selects the jth preset fan rotating speed adjusting coefficient aj to adjust Vi, j is set to be 1,2,3 and 4, and the adjusted fan rotating speed is Vi ', and Vi' is set to be Vi multiplied aj.
6. The high power electronic switch according to claim 5, wherein a first preset heat sink area S1, a second preset heat sink area S2, a third preset heat sink area S3 and a fourth preset heat sink area S4 are further arranged in the main control board, and the preset heat sink areas are gradually increased in sequence, wherein S1 < S2 < S3 < S4; the main control board is also provided with a first preset fan rotating speed correction coefficient n1, a second preset fan rotating speed correction coefficient n2, a third preset fan rotating speed correction coefficient n3 and a fourth preset fan rotating speed correction coefficient n4, wherein the preset fan rotating speed correction coefficients are gradually increased in sequence, and n1 is more than 0 and n2 is more than 1 and n3 is more than n 4;
when the main control board corrects the adjusted ith preset fan rotating speed Vi ', the main control board compares the radiator area S with each preset radiator area, and selects a corresponding fan rotating speed correction coefficient to correct the Vi' according to the comparison result:
when S is less than S1, the main control board selects n4 to correct Vi';
when S1 is not less than S < S2, the main control board selects n3 to correct Vi';
when S2 is not more than S < S3, no correction is carried out;
when S3 is not less than S < S4, the main control board selects n2 to correct Vi';
when S4 is not more than S, the main control board selects n1 to correct Vi';
when the main control board selects the j-th preset fan rotating speed correction coefficient nj to correct Vi ', j is set to be 1,2,3 and 4, the corrected fan rotating speed is Vi ", and Vi is set to be Vi' × nj.
7. The high-power electronic switch according to claim 6, wherein when the main control board controls the cooling fan to operate, the main control board compares the temperature T of the heat sink monitored by the temperature relay in real time with the temperature of each preset heat sink, and controls the cooling fan to operate according to the comparison result:
when T is more than or equal to T1 and less than T2, the main control board controls 1 heat radiation fan to work;
when T is more than or equal to T2 and less than T3, the main control board controls 2 cooling fans to work;
and when T is more than or equal to T3 and less than T4, the main control board controls the 3 cooling fans to work.
8. The high-power electronic switch according to claim 7, wherein when the temperature T of the heat radiator monitored by the temperature relay in real time is greater than or equal to T4, the main control board controls the switch shell to circulate cooling oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110180778.5A CN112994674A (en) | 2021-02-08 | 2021-02-08 | High-power electronic switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110180778.5A CN112994674A (en) | 2021-02-08 | 2021-02-08 | High-power electronic switch |
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| Publication Number | Publication Date |
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| CN112994674A true CN112994674A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110180778.5A Pending CN112994674A (en) | 2021-02-08 | 2021-02-08 | High-power electronic switch |
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| CN (1) | CN112994674A (en) |
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| CN203967959U (en) * | 2014-01-20 | 2014-11-26 | 林敦 | Thyristor (PCC) power |
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| CN208337417U (en) * | 2018-01-26 | 2019-01-04 | 广东晟开实业有限公司 | A kind of shell of frequency converter with heat sinking function |
| CN110989803A (en) * | 2019-11-25 | 2020-04-10 | 华为技术有限公司 | Heat dissipation method and electronic equipment |
| CN210573428U (en) * | 2019-11-12 | 2020-05-19 | 重庆西威电气有限公司 | IGBT temperature control device |
| CN111351148A (en) * | 2020-04-02 | 2020-06-30 | 珠海格力电器股份有限公司 | Electrical box radiating assembly, control method and air conditioner |
| CN212366591U (en) * | 2020-05-21 | 2021-01-15 | 沈阳麦斯电气研究所有限公司 | Environment-friendly switch board |
| CN213846243U (en) * | 2020-10-12 | 2021-07-30 | 昂顿科技（上海）有限公司 | Novel thyristor switch |
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2021
- 2021-02-08 CN CN202110180778.5A patent/CN112994674A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203967959U (en) * | 2014-01-20 | 2014-11-26 | 林敦 | Thyristor (PCC) power |
| CN105003454A (en) * | 2015-06-08 | 2015-10-28 | 厦门科华恒盛股份有限公司 | Draught fan control device and control method for improving reliable operation of draught fan |
| CN208337417U (en) * | 2018-01-26 | 2019-01-04 | 广东晟开实业有限公司 | A kind of shell of frequency converter with heat sinking function |
| CN210573428U (en) * | 2019-11-12 | 2020-05-19 | 重庆西威电气有限公司 | IGBT temperature control device |
| CN110989803A (en) * | 2019-11-25 | 2020-04-10 | 华为技术有限公司 | Heat dissipation method and electronic equipment |
| CN111351148A (en) * | 2020-04-02 | 2020-06-30 | 珠海格力电器股份有限公司 | Electrical box radiating assembly, control method and air conditioner |
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| CN213846243U (en) * | 2020-10-12 | 2021-07-30 | 昂顿科技（上海）有限公司 | Novel thyristor switch |
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