CN112524078B - Fan control system of switch cabinet - Google Patents
Fan control system of switch cabinet Download PDFInfo
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- CN112524078B CN112524078B CN202011431487.0A CN202011431487A CN112524078B CN 112524078 B CN112524078 B CN 112524078B CN 202011431487 A CN202011431487 A CN 202011431487A CN 112524078 B CN112524078 B CN 112524078B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Control Of Voltage And Current In General (AREA)
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Abstract
The invention provides a switch cabinet fan control system which comprises a main controller, a switch cabinet current detection module, a switch cabinet temperature detection module, a fan current detection module, a power supply module and a fan, wherein the main controller is connected with the main controller; the switch cabinet current detection module, the switch cabinet temperature detection module and the switch cabinet temperature detection module are all connected with the main controller and respectively detect the actual current value of the three-phase load circuit of the switch cabinet, the actual temperature value of the three-phase load circuit of the switch cabinet and the actual current value of the three-phase working circuit of the fan; the main controller is also provided with a rated current value of a three-phase load circuit of the switch cabinet, a rated temperature value of the three-phase load circuit of the switch cabinet and a rated current value of a three-phase working circuit of the fan; the current value and the temperature value of the three-phase load circuit of the switch cabinet and the current value of the three-phase working circuit of the fan are jointly used as the criterion for starting and stopping the fan, so that the stable operation of the switch cabinet and the fan is ensured.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a switch cabinet fan control system.
Background
The large-scale electric and electronic control equipment in various industrial fields is gradually enlarged, and a large-scale current switch cabinet is indispensable for ensuring the safe operation of large-scale equipment. The large-scale current switch cabinet produced at present generally adopts air cooling for cooling in order to prevent the temperature rise from being overhigh during operation. At present, manufacturers adopt two modes to control a fan to carry out air cooling and cooling: one is to adopt the main loop current as the criterion to control the operation of the fan; and the other method adopts the ambient temperature as a criterion to control the operation of the fan. The method has single criterion and cannot cope with complex practical situations.
Chinese patent CN203223407U, published in 2013, 10, month and 2, provides a switch cabinet air cooling controller, which comprises an integrated control circuit and a fan, and has the technical key points that: a fan is arranged on a supporting beam at the inner side of the switch cabinet with the circuit breaker, the copper bar bus and the related electric control unit, and the wind direction of the fan corresponds to the circuit breaker or/and the copper bar bus; the fan is connected with the integrated control circuit through an output signal wire, and the input end of the integrated control circuit is respectively connected with the output ends of the current transformer and the temperature sensor; the output end of the integrated control circuit is connected with the background control unit; a control switch for starting the fan when the load current is more than or equal to 80% of the rated current and the temperature detected by the temperature sensor is more than or equal to the rated temperature is arranged in the integrated control circuit. The comprehensive current and the temperature of the patent are used as criteria to control the starting and the stopping of the fan, but the criteria are still single, and the complex actual situation cannot be responded.
Disclosure of Invention
The invention provides a switch cabinet fan control system for overcoming the defect that the criterion for controlling the starting and stopping of a fan is single in the prior art.
The technical scheme of the invention is as follows:
the invention provides a switch cabinet fan control system which comprises a main controller, a switch cabinet current detection module, a switch cabinet temperature detection module, a fan current detection module, a power supply module and a fan, wherein the main controller is connected with the switch cabinet current detection module;
the switch cabinet current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase load circuit of the switch cabinet and transmitting the actual current value of the three-phase load circuit to the main controller;
the switch cabinet temperature detection module is connected with the main controller and is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet and transmitting the actual temperature value of the three-phase load circuit to the main controller;
the fan current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase working circuit of the fan and transmitting the actual current value of the three-phase working circuit to the main controller;
the main controller is also provided with a rated current value of a three-phase load circuit of the switch cabinet, a rated temperature value of the three-phase load circuit of the switch cabinet and a rated current value of a three-phase working circuit of the fan;
when the actual current value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated current value of the three-phase load circuit of the switch cabinet and/or the actual temperature value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated temperature value of the three-phase load circuit of the switch cabinet, the main controller controls the fan to be started;
when the actual current values of the three phases of the switch cabinet three-phase load circuit are not greater than the rated current value of the switch cabinet three-phase load circuit and the actual temperature values of the three phases of the switch cabinet three-phase load circuit are not greater than the rated temperature value of the switch cabinet three-phase load circuit, or the actual current value of any one phase of the fan three-phase working circuit is greater than the rated current value of the fan three-phase working circuit, the main controller controls the fan to be turned off;
the power module supplies power for the main controller, the switch cabinet current detection module, the switch cabinet temperature detection module and the fan current detection module.
Preferably, the power supply module comprises an alternating current power supply U, a voltage dependent resistor RV1, a transformer Lp2, a capacitor Cx1, a capacitor Cx2, a capacitor Cy3, a capacitor Cy4, a capacitor Cx5, a conversion module U2, a capacitor C5, a diode D1, a conversion module U1, a capacitor C4, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58 and a capacitor C59;
the L end of the alternating current power supply U is connected with one end of a piezoresistor RV1, and the other end of the piezoresistor RV1 is connected with the N end of the alternating current power supply U;
the L end of the alternating current power supply U is also connected with one end of a capacitor Cx1, and the other end of the capacitor Cx1 is connected with the N end of the alternating current power supply U;
a pin 1 of the transformer Lp1 is connected with one end of a capacitor Cx1, a pin 2 of the transformer Lp1 is connected with the other end of the capacitor Cx1, a pin 3 of the transformer Lp1 is connected with one end of the capacitor Cx2, and a pin 4 of the transformer Lp1 is connected with the other end of the capacitor Cx 2;
the pin 3 of the transformer Lp1 is further connected with one end of a capacitor Cy3, the other end of the capacitor Cy3 is connected with one end of a capacitor Cy4, and the other end of the capacitor Cy4 is connected with the pin 4 of the transformer Lp 1;
a pin 1 of the transformer Lp2 is connected with one end of a capacitor Cy3, a pin 2 of the transformer Lp2 is connected with the other end of a capacitor Cy4, a pin 3 of the transformer Lp2 is connected with one end of a capacitor Cx5, and a pin 4 of the transformer Lp2 is connected with the other end of the capacitor Cx 5;
a pin 2 of the conversion module U2 is connected with one end of a capacitor Cx5, a pin 1 of the conversion module U2 is connected with the other end of the capacitor Cx5, a pin 3 of the conversion module U2 is a 5v direct-current voltage output pin, a pin 4 of the conversion module U2 is grounded, and the capacitor C2, the capacitor C5 and the diode D1 are connected in parallel and then connected between the pin 3 and the pin 4 of the conversion module U2;
the 1 pin of the conversion module U1 is grounded, the 3 pins of the conversion module U1 are connected with the 3 pins of the conversion module U2, the 3 pins of the conversion module U1 are further connected with one end of a capacitor C55 and one end of a capacitor C58, the other ends of the capacitor C55 and the other end of the capacitor C58 are grounded, the 2 pins and the 4 pins of the conversion module U1 are connected to serve as a 3.3v direct-current voltage output pin, the 2 pins and the 4 pins of the conversion module U1 are connected to be further connected with one end of a capacitor C4, one end of a capacitor C56, one end of a capacitor C57 and one end of a capacitor C59, and the other end of the capacitor C4, the other end of the capacitor C56, the other end of the capacitor C57 and the other end of the capacitor C59 are grounded.
Preferably, the switch cabinet current detection module comprises a current sensor L2, a resistor R49, a resistor R51, a resistor R53, a capacitor C22, a capacitor C24, a capacitor C26 and a metering chip U8;
metering chip U8's 1 foot is connected with power module's 5v direct current voltage output pin, and metering chip U8's 1 foot still is connected with electric capacity C22's one end, and electric capacity C22's other end ground connection, metering chip U8's 2 feet are connected with electric capacity C24's one end, and metering chip U8's 3 feet are connected with resistance R53's one end, and metering chip U8's 5 feet ground connection, metering chip U8's 6 feet are connected with the master controller.
Preferably, the number of the switch cabinet current detection modules is 3, the actual current value of each phase circuit of the switch cabinet three-phase load circuit is detected respectively, and the actual current value of each phase circuit of the switch cabinet three-phase load circuit is transmitted to the main controller.
Preferably, the switch cabinet temperature detection module comprises a temperature sensor T1, a resistor R92, a resistor R97, a resistor R98, a resistor R99, a resistor R101, a resistor R103, a resistor R104, a resistor R105, a capacitor C48, a capacitor C50 and an amplifier U24;
the temperature sensor T1 detects the actual temperature value of any phase of a three-phase load circuit of the switch cabinet, a pin 1 of the temperature sensor T1 is grounded, a pin 2 of the temperature sensor T1 is connected with one end of a resistor R104, the other end of the resistor R104 is connected with one end of a resistor R98, the other end of the resistor R98 is connected with one end of a resistor R97, the other end of the resistor R97 is connected with a pin 3 of the temperature sensor T1, and the other end of the resistor R98 is connected with a 3.3v direct-current voltage output pin of a power supply module;
the other end of the resistor R104 is also connected with one end of a resistor R99, the other end of the resistor R99 is connected with a pin 2 of the amplifier U24, the other end of the resistor R99 is also connected with one end of a resistor R92, and the other end of the resistor R92 is connected with a pin 1 of the amplifier U24;
the other end of the resistor R97 is also connected with one end of a resistor R103, the other end of the resistor R103 is connected with a pin 3 of the amplifier U24, the other end of the resistor R103 is also connected with one end of a resistor R105, and the other end of the resistor R105 is grounded;
the amplifier U24 pin 1 is connected with one end of a resistor R101, the other end of the resistor R101 is connected with a main controller of the main controller, the other end of the resistor R101 is further connected with one end of a capacitor C50, the other end of the capacitor C50 is grounded, the amplifier U24 pin 4 is connected with a 3.3v direct-current voltage output pin of the power module, the amplifier U24 pin 4 is further connected with one end of a capacitor C48, the other end of the capacitor C48 is grounded, and the amplifier U24 pin 5 is grounded.
Preferably, the number of the switch cabinet temperature detection modules is 3, the actual temperature value of each phase circuit of the three-phase load circuit of the switch cabinet is detected respectively, and the actual temperature value of each phase circuit of the three-phase load circuit of the switch cabinet is transmitted to the main controller.
Preferably, the fan current detection module comprises a current sensor L3, a resistor R50, a resistor R52, a resistor R54, a capacitor C23, a capacitor C25, a capacitor C27 and a metering chip U9;
the 4 feet of the current sensor L3 are further connected to one end of a resistor R50, the other end of the resistor R50 is connected to one end of a capacitor C25, the other end of the capacitor C25 is connected to one end of a capacitor C27, the other end of the capacitor C27 is connected to one end of a resistor R54, and the other end of the resistor R54 is connected to the 3 feet of the current sensor L3;
the measuring chip is characterized in that a pin 1 of the measuring chip U9 is connected with a 5v direct-current voltage output pin of the power supply module, a pin 1 of the measuring chip U9 is further connected with one end of the capacitor C23, the other end of the capacitor C23 is grounded, a pin 2 of the measuring chip U9 is connected with one end of the capacitor C25, a pin 3 of the measuring chip U9 is connected with one end of the resistor R54, a pin 5 of the measuring chip U9 is grounded, and a pin 6 of the measuring chip U9 is connected with the master controller.
Preferably, the number of the fan current detection modules is 3, the actual current value of each phase circuit of the three-phase working circuit of the fan is detected respectively, and the actual current value of each phase circuit of the three-phase working circuit of the fan is transmitted to the main controller.
Preferably, the model of the master controller is STM32F030RCT6;
30 pins of the main controller are connected with 6 pins of a metering chip U8 in the switch cabinet current detection module, 14 pins of the main controller are connected with the other end of a resistor R101 in the switch cabinet temperature detection module, 43 pins of the main controller are connected with 6 pins of a metering chip U9 in the fan current detection module, 1 pin, 13 pins, 19 pins, 32 pins, 48 pins and 64 pins of the main controller are connected with a 3.3v direct-current voltage output pin of the power supply module, and 37 pins, 38 pins, 39 pins, 40 pins and 41 pins of the main controller are connected with a motor control end.
Preferably, the model of the metering chip U8 and the metering chip U9 is HLW8032.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the method comprises the steps that a switch cabinet current detection module is used for detecting the actual current value of a three-phase load circuit of the switch cabinet, a switch cabinet temperature detection module is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet, and a fan current detection module is used for detecting the actual current value of a three-phase working circuit of a fan; the rated current value of the three-phase load circuit, the rated temperature value of the three-phase load circuit and the rated current value of the three-phase working circuit of the fan are set through the main controller; the main controller synthesizes the actual current value and the rated current value of the three-phase load circuit of the switch cabinet, the actual temperature value and the rated temperature value of the three-phase load circuit of the switch cabinet and the comparison result of the actual current value and the rated current value of the three-phase working circuit of the fan to control the start and the stop of the fan. The current value and the temperature value of the three-phase load circuit of the switch cabinet and the current value of the three-phase working circuit of the fan are jointly used as the criterion for starting and stopping the fan, so that the stable operation of the switch cabinet and the fan is ensured.
Drawings
Fig. 1 is a schematic diagram of a switch cabinet fan control system according to embodiment 1;
FIG. 2 is a schematic circuit diagram of a power module according to embodiment 2;
fig. 3 is a schematic circuit diagram of a switch cabinet current detection module according to embodiment 2;
fig. 4 is a schematic circuit diagram of a temperature detection module of the switchgear according to embodiment 2;
fig. 5 is a schematic circuit diagram of a fan current detection module according to embodiment 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The embodiment provides a switch cabinet fan control system, as shown in fig. 1, the system includes a main controller, a switch cabinet current detection module, a switch cabinet temperature detection module, a fan current detection module, a power supply module and a fan;
the switch cabinet current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase load circuit of the switch cabinet and transmitting the actual current value of the three-phase load circuit to the main controller;
the switch cabinet temperature detection module is connected with the main controller and is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet and transmitting the actual temperature value of the three-phase load circuit to the main controller;
the fan current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase working circuit of the fan and transmitting the actual current value of the three-phase working circuit to the main controller;
the main controller is also provided with a rated current value of a three-phase load circuit of the switch cabinet, a rated temperature value of the three-phase load circuit of the switch cabinet and a rated current value of a three-phase working circuit of the fan;
when the actual current value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated current value of the three-phase load circuit of the switch cabinet and/or the actual temperature value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated temperature value of the three-phase load circuit of the switch cabinet, the main controller controls the fan to be started;
when the actual current values of the three phases of the three-phase load circuit of the switch cabinet are not more than the rated current value of the three-phase load circuit of the switch cabinet and the actual temperature values of the three phases of the three-phase load circuit of the switch cabinet are not more than the rated temperature value of the three-phase load circuit of the switch cabinet, or the actual current value of any one phase of the three-phase working circuit of the fan is more than the rated current value of the three-phase working circuit of the fan, the main controller controls the fan to be turned off;
the power supply module supplies power for the main controller, the switch cabinet current detection module, the switch cabinet temperature detection module and the fan current detection module.
In the embodiment, a switch cabinet current detection module is used for detecting the actual current value of a three-phase load circuit of a switch cabinet, a switch cabinet temperature detection module is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet, and a fan current detection module is used for detecting the actual current value of a three-phase working circuit of a fan; the rated current value of the three-phase load circuit, the rated temperature value of the three-phase load circuit and the rated current value of the three-phase working circuit of the fan are set through the main controller; the main controller synthesizes the actual current value and the rated current value of the three-phase load circuit of the switch cabinet, the actual temperature value and the rated temperature value of the three-phase load circuit of the switch cabinet and the comparison result of the actual current value and the rated current value of the three-phase working circuit of the fan to control the start and the stop of the fan. The invention not only takes the switch cabinet load current and temperature as criteria, but also considers the load capacity of the fan, thereby ensuring the stable operation of the switch cabinet and the fan.
Example 2
The embodiment provides a switch cabinet fan control system which comprises a main controller, a switch cabinet current detection module, a switch cabinet temperature detection module, a fan current detection module, a power supply module and a fan, wherein the main controller is connected with the switch cabinet current detection module;
the switch cabinet current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase load circuit of the switch cabinet and transmitting the actual current value of the three-phase load circuit to the main controller;
the switch cabinet temperature detection module is connected with the main controller and is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet and transmitting the actual temperature value of the three-phase load circuit to the main controller;
the fan current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase working circuit of the fan and transmitting the actual current value of the three-phase working circuit to the main controller;
the main controller is also provided with a rated current value of a three-phase load circuit of the switch cabinet, a rated temperature value of the three-phase load circuit of the switch cabinet and a rated current value of a three-phase working circuit of the fan;
when the actual current value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated current value of the three-phase load circuit of the switch cabinet and/or the actual temperature value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated temperature value of the three-phase load circuit of the switch cabinet, the main controller controls the fan to be started;
when the actual current values of the three phases of the three-phase load circuit of the switch cabinet are not more than the rated current value of the three-phase load circuit of the switch cabinet and the actual temperature values of the three phases of the three-phase load circuit of the switch cabinet are not more than the rated temperature value of the three-phase load circuit of the switch cabinet, or the actual current value of any one phase of the three-phase working circuit of the fan is more than the rated current value of the three-phase working circuit of the fan, the main controller controls the fan to be turned off;
the power supply module supplies power for the main controller, the switch cabinet current detection module, the switch cabinet temperature detection module and the fan current detection module.
As shown in fig. 2, the power supply module includes an ac power supply U, a voltage dependent resistor RV1, a transformer Lp2, a capacitor Cx1, a capacitor Cx2, a capacitor Cy3, a capacitor Cy4, a capacitor Cx5, a conversion module U2, a capacitor C5, a diode D1, a conversion module U1, a capacitor C4, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58, and a capacitor C59;
the L end of the alternating current power supply U is connected with one end of a piezoresistor RV1, and the other end of the piezoresistor RV1 is connected with the N end of the alternating current power supply U;
the L end of the alternating current power supply U is also connected with one end of a capacitor Cx1, and the other end of the capacitor Cx1 is connected with the N end of the alternating current power supply U;
a pin 1 of the transformer Lp1 is connected with one end of a capacitor Cx1, a pin 2 of the transformer Lp1 is connected with the other end of the capacitor Cx1, a pin 3 of the transformer Lp1 is connected with one end of the capacitor Cx2, and a pin 4 of the transformer Lp1 is connected with the other end of the capacitor Cx 2;
the pin 3 of the transformer Lp1 is also connected with one end of a capacitor Cy3, the other end of the capacitor Cy3 is connected with one end of a capacitor Cy4, and the other end of the capacitor Cy4 is connected with the pin 4 of the transformer Lp 1;
a pin 1 of the transformer Lp2 is connected with one end of a capacitor Cy3, a pin 2 of the transformer Lp2 is connected with the other end of a capacitor Cy4, a pin 3 of the transformer Lp2 is connected with one end of a capacitor Cx5, and a pin 4 of the transformer Lp2 is connected with the other end of the capacitor Cx 5;
a pin 2 of the conversion module U2 is connected with one end of a capacitor Cx5, a pin 1 of the conversion module U2 is connected with the other end of the capacitor Cx5, a pin 3 of the conversion module U2 is a 5v direct-current voltage output pin, a pin 4 of the conversion module U2 is grounded, and the capacitor C2, the capacitor C5 and the diode D1 are connected in parallel and then connected between the pin 3 and the pin 4 of the conversion module U2;
the 1 pin of conversion module U1 is grounded, 3 pins of conversion module U1 are connected with 3 pins of conversion module U2, 3 pins of conversion module U1 are still connected with one end of capacitor C55, one end of capacitor C58, the other end of capacitor C55, the other end of capacitor C58 all is grounded, 2 pins and 4 pins of conversion module U1 are connected and then serve as 3.3v direct current voltage output pins, 2 pins and 4 pins of conversion module U1 are connected and then are still connected with one end of capacitor C4, one end of capacitor C56, one end of capacitor C57, one end of capacitor C59, the other end of capacitor C4, the other end of capacitor C56, the other end of capacitor C57, and the other end of capacitor C59 are all grounded.
As shown in fig. 3, the switch cabinet current detection module includes a current sensor L2, a resistor R49, a resistor R51, a resistor R53, a capacitor C22, a capacitor C24, a capacitor C26, and a metering chip U8;
metering chip U8's 1 foot is connected with power module's 5v direct voltage output pin, and metering chip U8's 1 foot still is connected with electric capacity C22's one end, and electric capacity C22's other end ground connection, 2 feet and electric capacity C24's one end of metering chip U8 are connected, and metering chip U8's 3 feet are connected with resistance R53's one end, and metering chip U8's 5 feet ground connection, metering chip U8's 6 feet are connected with the master controller.
The number of the switch cabinet current detection modules is 3, the actual current value of each phase circuit of the switch cabinet three-phase load circuit is detected respectively, and the actual current value of each phase circuit of the switch cabinet three-phase load circuit is transmitted to the main controller.
As shown in fig. 4, the switch cabinet temperature detection module includes a temperature sensor T1, a resistor R92, a resistor R97, a resistor R98, a resistor R99, a resistor R101, a resistor R103, a resistor R104, a resistor R105, a capacitor C48, a capacitor C50, and an amplifier U24;
the temperature sensor T1 detects the actual temperature value of any phase of a three-phase load circuit of the switch cabinet, a pin 1 of the temperature sensor T1 is grounded, a pin 2 of the temperature sensor T1 is connected with one end of a resistor R104, the other end of the resistor R104 is connected with one end of a resistor R98, the other end of the resistor R98 is connected with one end of a resistor R97, the other end of the resistor R97 is connected with a pin 3 of the temperature sensor T1, and the other end of the resistor R98 is connected with a 3.3v direct-current voltage output pin of a power supply module;
the other end of the resistor R104 is also connected with one end of a resistor R99, the other end of the resistor R99 is connected with a pin 2 of the amplifier U24, the other end of the resistor R99 is also connected with one end of a resistor R92, and the other end of the resistor R92 is connected with a pin 1 of the amplifier U24;
the other end of the resistor R97 is also connected with one end of a resistor R103, the other end of the resistor R103 is connected with a pin 3 of the amplifier U24, the other end of the resistor R103 is also connected with one end of a resistor R105, and the other end of the resistor R105 is grounded;
the amplifier U24 pin 1 is connected with one end of a resistor R101, the other end of the resistor R101 is connected with a main controller of the main controller, the other end of the resistor R101 is further connected with one end of a capacitor C50, the other end of the capacitor C50 is grounded, the amplifier U24 pin 4 is connected with a 3.3v direct-current voltage output pin of the power module, the amplifier U24 pin 4 is further connected with one end of a capacitor C48, the other end of the capacitor C48 is grounded, and the amplifier U24 pin 5 is grounded.
The number of the switch cabinet temperature detection modules is 3, the actual temperature values of each phase circuit of the three-phase load circuit of the switch cabinet are respectively detected, and the actual temperature values of each phase circuit of the three-phase load circuit of the switch cabinet are transmitted to the main controller.
As shown in fig. 5, the fan current detection module includes a current sensor L3, a resistor R50, a resistor R52, a resistor R54, a capacitor C23, a capacitor C25, a capacitor C27, and a metering chip U9;
the pin 4 of the current sensor L3 is further connected to one end of a resistor R50, the other end of the resistor R50 is connected to one end of a capacitor C25, the other end of the capacitor C25 is connected to one end of a capacitor C27, the other end of the capacitor C27 is connected to one end of a resistor R54, and the other end of the resistor R54 is connected to the pin 3 of the current sensor L3;
the measuring chip is characterized in that a pin 1 of the measuring chip U9 is connected with a 5v direct-current voltage output pin of the power supply module, a pin 1 of the measuring chip U9 is further connected with one end of the capacitor C23, the other end of the capacitor C23 is grounded, a pin 2 of the measuring chip U9 is connected with one end of the capacitor C25, a pin 3 of the measuring chip U9 is connected with one end of the resistor R54, a pin 5 of the measuring chip U9 is grounded, and a pin 6 of the measuring chip U9 is connected with the master controller.
The number of the fan current detection modules is 3, the actual current value of each phase circuit of the fan three-phase working circuit is detected respectively, and the actual current value of each phase circuit of the fan three-phase working circuit is transmitted to the main controller.
The model of the master controller is STM32F030RCT6;
30 feet of the main controller are connected with 6 feet of a metering chip U8 in the switch cabinet current detection module, 14 feet of the main controller are connected with the other end of a resistor R101 in the switch cabinet temperature detection module, 43 feet of the main controller are connected with 6 feet of a metering chip U9 in the fan current detection module, 1 foot, 13 feet, 19 feet, 32 feet, 48 feet and 64 feet of the main controller are connected with a 3.3v direct-current voltage output foot of the power supply module, and 37 feet, 38 feet, 39 feet, 40 feet and 41 feet of the main controller are connected with a motor control end.
The measurement chip U8 and the measurement chip U9 are in a HLW8032 model.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A switch cabinet fan control system is characterized by comprising a main controller, a switch cabinet current detection module, a switch cabinet temperature detection module, a fan current detection module, a power supply module and a fan;
the switch cabinet current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase load circuit of the switch cabinet and transmitting the actual current value of the three-phase load circuit to the main controller;
the switch cabinet temperature detection module is connected with the main controller and is used for detecting the actual temperature value of the three-phase load circuit of the switch cabinet and transmitting the actual temperature value of the three-phase load circuit to the main controller;
the fan current detection module is connected with the main controller and is used for detecting the actual current value of the three-phase working circuit of the fan and transmitting the actual current value of the three-phase working circuit to the main controller;
the main controller is also provided with a rated current value of a three-phase load circuit of the switch cabinet, a rated temperature value of the three-phase load circuit of the switch cabinet and a rated current value of a three-phase working circuit of the fan;
when the actual current value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated current value of the three-phase load circuit of the switch cabinet and/or the actual temperature value of any phase of the three-phase load circuit of the switch cabinet is larger than the rated temperature value of the three-phase load circuit of the switch cabinet, the main controller controls the fan to be started;
when the actual current values of the three phases of the switch cabinet three-phase load circuit are not greater than the rated current value of the switch cabinet three-phase load circuit and the actual temperature values of the three phases of the switch cabinet three-phase load circuit are not greater than the rated temperature value of the switch cabinet three-phase load circuit, or the actual current value of any one phase of the fan three-phase working circuit is greater than the rated current value of the fan three-phase working circuit, the main controller controls the fan to be turned off;
the power supply module supplies power for the main controller, the switch cabinet current detection module, the switch cabinet temperature detection module and the fan current detection module;
the power supply module comprises an alternating current power supply U, a piezoresistor RV1, a transformer Lp2, a capacitor Cx1, a capacitor Cx2, a capacitor Cy3, a capacitor Cy4, a capacitor Cx5, a conversion module U2, a capacitor C5, a diode D1, a conversion module U1, a capacitor C4, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58 and a capacitor C59;
the L end of the alternating current power supply U is connected with one end of a piezoresistor RV1, and the other end of the piezoresistor RV1 is connected with the N end of the alternating current power supply U;
the L end of the alternating current power supply U is also connected with one end of a capacitor Cx1, and the other end of the capacitor Cx1 is connected with the N end of the alternating current power supply U;
a pin 1 of the transformer Lp1 is connected with one end of a capacitor Cx1, a pin 2 of the transformer Lp1 is connected with the other end of the capacitor Cx1, a pin 3 of the transformer Lp1 is connected with one end of the capacitor Cx2, and a pin 4 of the transformer Lp1 is connected with the other end of the capacitor Cx 2;
the pin 3 of the transformer Lp1 is also connected with one end of a capacitor Cy3, the other end of the capacitor Cy3 is connected with one end of a capacitor Cy4, and the other end of the capacitor Cy4 is connected with the pin 4 of the transformer Lp 1;
a pin 1 of the transformer Lp2 is connected with one end of a capacitor Cy3, a pin 2 of the transformer Lp2 is connected with the other end of a capacitor Cy4, a pin 3 of the transformer Lp2 is connected with one end of a capacitor Cx5, and a pin 4 of the transformer Lp2 is connected with the other end of the capacitor Cx 5;
a pin 2 of the conversion module U2 is connected with one end of a capacitor Cx5, a pin 1 of the conversion module U2 is connected with the other end of the capacitor Cx5, a pin 3 of the conversion module U2 is a 5v direct-current voltage output pin, a pin 4 of the conversion module U2 is grounded, and the capacitor C2, the capacitor C5 and the diode D1 are connected in parallel and then connected between the pin 3 and the pin 4 of the conversion module U2;
the pin 1 of the conversion module U1 is grounded, the pin 3 of the conversion module U1 is connected with the pin 3 of the conversion module U2, the pin 3 of the conversion module U1 is further connected with one end of a capacitor C55 and one end of a capacitor C58, the other end of the capacitor C55 and the other end of the capacitor C58 are both grounded, the pin 2 and the pin 4 of the conversion module U1 are connected to serve as a 3.3v direct-current voltage output pin, the pin 2 and the pin 4 of the conversion module U1 are connected to be further connected with one end of a capacitor C4, one end of a capacitor C56, one end of a capacitor C57 and one end of a capacitor C59, and the other end of the capacitor C4, the other end of the capacitor C56, the other end of the capacitor C57 and the other end of the capacitor C59 are all grounded;
the switch cabinet current detection module comprises a current sensor L2, a resistor R49, a resistor R51, a resistor R53, a capacitor C22, a capacitor C24, a capacitor C26 and a metering chip U8;
pins 3 and 4 of the current sensor L2 are connected with any phase circuit of a three-phase load circuit of the switch cabinet, pin 2 of the current sensor L2 is connected with one end of a resistor R51, and the other end of the resistor R51 is connected with pin 1 of the current sensor L2;
pin 2 of the current sensor L2 is further connected to one end of a resistor R49, the other end of the resistor R49 is connected to one end of a capacitor C24, the other end of the capacitor C24 is connected to one end of a capacitor C26, the other end of the capacitor C26 is connected to one end of a resistor R53, and the other end of the resistor R53 is connected to pin 1 of the current sensor L2;
metering chip U8's 1 foot is connected with power module's 5v direct voltage output pin, and metering chip U8's 1 foot still is connected with electric capacity C22's one end, and electric capacity C22's other end ground connection, 2 feet and electric capacity C24's one end of metering chip U8 are connected, and metering chip U8's 3 feet are connected with resistance R53's one end, and metering chip U8's 5 feet ground connection, metering chip U8's 6 feet are connected with the master controller.
2. The switch cabinet fan control system according to claim 1, wherein the number of the switch cabinet current detection modules is 3, the switch cabinet current detection modules are used for respectively detecting the actual current value of each phase circuit of the switch cabinet three-phase load circuit and transmitting the actual current value of each phase circuit of the switch cabinet three-phase load circuit to the master controller.
3. The switch cabinet fan control system according to claim 2, wherein the switch cabinet temperature detection module comprises a temperature sensor T1, a resistor R92, a resistor R97, a resistor R98, a resistor R99, a resistor R101, a resistor R103, a resistor R104, a resistor R105, a capacitor C48, a capacitor C50 and an amplifier U24;
the temperature sensor T1 detects the actual temperature value of any phase of a three-phase load circuit of the switch cabinet, a pin 1 of the temperature sensor T1 is grounded, a pin 2 of the temperature sensor T1 is connected with one end of a resistor R104, the other end of the resistor R104 is connected with one end of a resistor R98, the other end of the resistor R98 is connected with one end of a resistor R97, the other end of the resistor R97 is connected with a pin 3 of the temperature sensor T1, and the other end of the resistor R98 is connected with a 3.3v direct-current voltage output pin of a power supply module;
the other end of the resistor R104 is also connected with one end of a resistor R99, the other end of the resistor R99 is connected with a pin 2 of the amplifier U24, the other end of the resistor R99 is also connected with one end of a resistor R92, and the other end of the resistor R92 is connected with a pin 1 of the amplifier U24;
the other end of the resistor R97 is also connected with one end of a resistor R103, the other end of the resistor R103 is connected with a pin 3 of the amplifier U24, the other end of the resistor R103 is also connected with one end of a resistor R105, and the other end of the resistor R105 is grounded;
a pin 1 of the amplifier U24 is connected with one end of the resistor R101, the other end of the resistor R101 is connected with a main controller of the main controller, the other end of the resistor R101 is further connected with one end of the capacitor C50, the other end of the capacitor C50 is grounded, a pin 4 of the amplifier U24 is connected with a direct-current voltage output pin 3.3v of the power module, a pin 4 of the amplifier U24 is further connected with one end of the capacitor C48, the other end of the capacitor C48 is grounded, and a pin 5 of the amplifier U24 is grounded.
4. The fan control system of claim 3, wherein the number of the switch cabinet temperature detection modules is 3, the actual temperature values of each phase circuit of the three-phase load circuit of the switch cabinet are respectively detected, and the actual temperature values of each phase circuit of the three-phase load circuit of the switch cabinet are transmitted to the master controller.
5. The switch cabinet fan control system according to claim 4, wherein the fan current detection module comprises a current sensor L3, a resistor R50, a resistor R52, a resistor R54, a capacitor C23, a capacitor C25, a capacitor C27 and a metering chip U9;
pins 1 and 2 of the current sensor L3 are connected with any phase circuit of the three-phase working circuit of the fan, pin 4 of the current sensor L3 is connected with one end of a resistor R52, and the other end of the resistor R52 is connected with pin 3 of the current sensor L2;
the pin 4 of the current sensor L3 is further connected to one end of a resistor R50, the other end of the resistor R50 is connected to one end of a capacitor C25, the other end of the capacitor C25 is connected to one end of a capacitor C27, the other end of the capacitor C27 is connected to one end of a resistor R54, and the other end of the resistor R54 is connected to the pin 3 of the current sensor L3;
the measuring chip is characterized in that a pin 1 of the measuring chip U9 is connected with a 5v direct-current voltage output pin of the power supply module, a pin 1 of the measuring chip U9 is further connected with one end of the capacitor C23, the other end of the capacitor C23 is grounded, a pin 2 of the measuring chip U9 is connected with one end of the capacitor C25, a pin 3 of the measuring chip U9 is connected with one end of the resistor R54, a pin 5 of the measuring chip U9 is grounded, and a pin 6 of the measuring chip U9 is connected with the master controller.
6. The switch cabinet fan control system according to claim 5, wherein the number of the fan current detection modules is 3, the actual current values of each phase circuit of the three-phase working circuit of the fan are respectively detected, and the actual current values of each phase circuit of the three-phase working circuit of the fan are transmitted to the master controller.
7. The switch cabinet fan control system according to claim 6, wherein the master controller is of a model STM32F030RCT6;
30 feet of the main controller are connected with 6 feet of a metering chip U8 in the switch cabinet current detection module, 14 feet of the main controller are connected with the other end of a resistor R101 in the switch cabinet temperature detection module, 43 feet of the main controller are connected with 6 feet of a metering chip U9 in the fan current detection module, 1 foot, 13 feet, 19 feet, 32 feet, 48 feet and 64 feet of the main controller are connected with a 3.3v direct-current voltage output foot of the power supply module, and 37 feet, 38 feet, 39 feet, 40 feet and 41 feet of the main controller are connected with a motor control end.
8. The switch cabinet fan control system of claim 7, wherein the metering chip U8 and the metering chip U9 are of the type HLW8032.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011431487.0A CN112524078B (en) | 2020-12-09 | 2020-12-09 | Fan control system of switch cabinet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011431487.0A CN112524078B (en) | 2020-12-09 | 2020-12-09 | Fan control system of switch cabinet |
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| CN112524078B true CN112524078B (en) | 2023-01-24 |
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|---|---|---|---|---|
| CN101937241A (en) * | 2010-09-07 | 2011-01-05 | 山东达驰电气有限公司 | Electronic temperature controller of transformer |
| CN201844504U (en) * | 2010-09-30 | 2011-05-25 | 谢宗波 | Temperature control regulator of intelligent split-type air conditioner |
| CN102297709A (en) * | 2011-05-19 | 2011-12-28 | 常州大学 | Wireless industrial flow transducer |
| CN106025856A (en) * | 2016-06-27 | 2016-10-12 | 国网江苏省电力公司盐城供电公司 | High temperature prevention distribution box |
| TWM594894U (en) * | 2020-03-11 | 2020-05-11 | 藍天廚飾股份有限公司 | Circuit control device of electrical cabinet |
| CN111551779A (en) * | 2020-06-13 | 2020-08-18 | 义乌市德义物联网科技有限公司 | Assembled low-voltage intelligent monitoring device |
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2020
- 2020-12-09 CN CN202011431487.0A patent/CN112524078B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937241A (en) * | 2010-09-07 | 2011-01-05 | 山东达驰电气有限公司 | Electronic temperature controller of transformer |
| CN201844504U (en) * | 2010-09-30 | 2011-05-25 | 谢宗波 | Temperature control regulator of intelligent split-type air conditioner |
| CN102297709A (en) * | 2011-05-19 | 2011-12-28 | 常州大学 | Wireless industrial flow transducer |
| CN106025856A (en) * | 2016-06-27 | 2016-10-12 | 国网江苏省电力公司盐城供电公司 | High temperature prevention distribution box |
| TWM594894U (en) * | 2020-03-11 | 2020-05-11 | 藍天廚飾股份有限公司 | Circuit control device of electrical cabinet |
| CN111551779A (en) * | 2020-06-13 | 2020-08-18 | 义乌市德义物联网科技有限公司 | Assembled low-voltage intelligent monitoring device |
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