CN110932392A - Intelligent control system and control method for contactor - Google Patents
Intelligent control system and control method for contactor Download PDFInfo
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- CN110932392A CN110932392A CN201911108639.0A CN201911108639A CN110932392A CN 110932392 A CN110932392 A CN 110932392A CN 201911108639 A CN201911108639 A CN 201911108639A CN 110932392 A CN110932392 A CN 110932392A
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Abstract
The invention provides an intelligent control system and a control method of a contactor, wherein the control system comprises the contactor, a CPLD, a microcontroller, a comparator, a differential amplifier, a coil control circuit, an RS485 driver, a management computer and a shunt, the contactor is connected with the CPLD, the CPLD is respectively connected with the microcontroller, the coil control circuit and the comparator, the microcontroller is connected with the RS485 driver and the differential amplifier, the RS485 driver is connected with the management computer, and the differential amplifier is connected with the shunt.
Description
Technical Field
The invention relates to an intelligent control system and a control method for a contactor.
Background
In the aviation field, in order to perform power switching of high-power bus in a primary distribution device, a high-power contactor is generally used. The traditional high-power contactor does not have the functions of electric parameter detection, working state reporting, overcurrent protection of a distribution line and the like. Therefore, an intelligent control device is required to be added to make up for the defects of the conventional high-power contactor. The traditional high-power contactor and the intelligent control device of the contactor jointly form the intelligent contactor, and the intelligent contactor is widely used and accepted in the field of aviation airplanes.
In primary distribution installations of aircraft, reliable switching of high-power busbars is of crucial importance. The priority of the intelligent contactor is far higher than the functions of electric parameter detection, working state reporting and overcurrent protection of the distribution line of the intelligent contactor. In order to realize the intelligent function, the intelligent contactor needs to be added with a microcontroller or a microprocessor with built-in running software. The large amount of software processing activity tends to reduce the reliability of the underlying control functions of the contactor.
Disclosure of Invention
In order to solve the technical problem, the invention provides an intelligent control system and a control method for a contactor.
The invention is realized by the following technical scheme.
The control system comprises a contactor, a CPLD, a microcontroller, a comparator, a differential amplifier, a coil control circuit, an RS485 driver, a management computer and a current divider, wherein the contactor is connected with the CPLD, the CPLD is respectively connected with the microcontroller, the coil control circuit and the comparator, the microcontroller is connected with the RS485 driver and the differential amplifier, the RS485 driver is connected with the management computer, and the differential amplifier is connected with the current divider.
An intelligent control system and a control method for a contactor are provided, wherein the control method comprises the following steps:
s1, the management computer sends a contactor on-off control signal and a fault reset processing signal to the CPLD, and the CPLD judges the effectiveness of the contactor on-off control signal and the fault reset processing signal;
s2, transmitting a heartbeat pulse signal to the microcontroller by a time sequence generating unit in the CPLD, and transmitting the heartbeat pulse signal to the CPLD by the microcontroller;
s3, the CPLD receives the overcurrent protection signal transmitted by the microcontroller and latches the fault state;
s4, the current divider converts the current of the distribution line into voltage, compares the voltage with reference voltage, and sends a short-circuit protection signal to the CPLD after the comparison by the comparator;
s5, the CPLD transmits the contactor state, the short-circuit protection state and the CPLD self state to the microcontroller respectively;
s6, enabling a logic control unit in the CPLD to drive a coil control circuit of the contactor to be switched on or off according to the on-off control signal, the short-circuit protection signal and the overcurrent protection signal of the contactor;
s7, the microcontroller reports the state of the contactor, the over-current protection state, the short-circuit protection state and the CPLD state to the upper-level management computer through the communication bus RS485 respectively;
s8, if a fault occurs, the fault reset process signal clears the fault condition in the latch.
In step S1, the validity of the contactor on-off control signal and the fault reset processing signal is determined in a validity determination unit inside the CPLD.
In the step S2, if the CPLD determines that the microcontroller is normal according to the heartbeat pulse signal, the CPLD receives an overcurrent protection signal sent by the microcontroller.
In the step S4, the distribution line is connected to a shunt, the shunt is connected to two input ends of a differential amplifier, and the output end of the differential amplifier is connected to one input end of the microcontroller and one input end of the comparator.
In the step S5, the CPLD is connected to the microcontroller through the I/O port and transmits a signal.
The logic control unit in the step S6 determines that the contactor on-off control signal is valid, and sends a contactor on-off signal to the coil control circuit when the contactor on-off control signal is not valid and there is no short-circuit protection signal or overcurrent protection signal; otherwise, a contactor opening signal is sent out.
The CPLD model is 5M160ZE64A 5N; the microcontroller model is TMS320F28035 PNQ.
The invention has the beneficial effects that: after the CPLD is separated from the microcontroller, the reliability of power switching of the basic high-power bus bar is improved, the functional logic division of the CPLD and the microcontroller is clear, and the complexity of power switching of the high-power bus bar is reduced.
Drawings
Fig. 1 is a circuit schematic of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the control system includes a contactor, a CPLD, a microcontroller, a comparator, a differential amplifier, a coil control circuit, an RS485 driver, a management computer, and a shunt, the contactor is connected to the CPLD, the CPLD is connected to the microcontroller, the coil control circuit, and the comparator, the microcontroller is connected to the RS485 driver and the differential amplifier, the RS485 driver is connected to the management computer, and the differential amplifier is connected to the shunt.
An intelligent control system and a control method for a contactor are provided, wherein the control method comprises the following steps:
s1, the management computer sends a contactor on-off control signal and a fault reset processing signal to the CPLD, and the CPLD judges the effectiveness of the contactor on-off control signal and the fault reset processing signal;
s2, transmitting a heartbeat pulse signal to the microcontroller by a time sequence generating unit in the CPLD, and transmitting the heartbeat pulse signal to the CPLD by the microcontroller;
s3, the CPLD receives the overcurrent protection signal transmitted by the microcontroller and latches the fault state;
s4, the current divider converts the current of the distribution line into voltage, compares the voltage with reference voltage, and sends a short-circuit protection signal to the CPLD after the comparison by the comparator;
s5, the CPLD transmits the contactor state, the short-circuit protection state and the CPLD self state to the microcontroller respectively;
s6, enabling a logic control unit in the CPLD to drive a coil control circuit of the contactor to be switched on or off according to the on-off control signal, the short-circuit protection signal and the overcurrent protection signal of the contactor;
s7, the microcontroller reports the state of the contactor, the over-current protection state, the short-circuit protection state and the CPLD state to the upper-level management computer through the communication bus RS485 respectively;
s8, if a fault occurs, the fault reset process signal clears the fault condition in the latch.
In step S1, the validity of the contactor on-off control signal and the fault reset processing signal is determined in a validity determination unit inside the CPLD.
In the step S2, if the CPLD determines that the microcontroller is normal according to the heartbeat pulse signal, the CPLD receives an overcurrent protection signal sent by the microcontroller.
In the step S4, the distribution line is connected to a shunt, the shunt is connected to two input ends of a differential amplifier, and the output end of the differential amplifier is connected to one input end of the microcontroller and one input end of the comparator.
In the step S5, the CPLD is connected to the microcontroller through the I/O port and transmits a signal.
The logic control unit in the step S6 determines that the contactor on-off control signal is valid, and sends a contactor on-off signal to the coil control circuit when the contactor on-off control signal is not valid and there is no short-circuit protection signal or overcurrent protection signal; otherwise, a contactor opening signal is sent out.
The CPLD model is 5M160ZE64A 5N; the microcontroller model is TMS320F28035 PNQ.
The driving module is an RS485 driver, and the output end of the RS485 driver is connected with the management computer through an RS485 bus.
One input end of the comparator is connected with the GPIO end of the microcontroller, the other input end of the comparator is connected with the reference voltage, and the output end of the comparator is connected with the CPLD.
The CPLD and the GPIO end of the microcontroller bidirectionally send heartbeat pulse signals, the working state of the microcontroller is judged through the heartbeat pulse signals sent by the microcontroller, when the microcontroller cannot output the heartbeat pulse signals or the duty ratio of the output heartbeat pulse signals exceeds the limit, the microcontroller is judged to work abnormally, at the moment, overcurrent protection signals output by the microcontroller are shielded, and the on-off control of the contactor is independently completed; when the microcontroller is judged to work normally, the output overcurrent protection signal participates in the on-off control logic of the contactor, the CPLD receives the distribution line overcurrent protection signal output by the microcontroller and latches the overcurrent fault state, and the CPLD receives the short-circuit protection signal output by the distribution line short-circuit current detection circuit and latches the short-circuit fault state; the input end of the CPLD receives the on-off control signal and the fault reset signal of the contactor, collects and checks the effectiveness of the on-off control signal and the fault reset signal of the contactor, according to the on-off control signal, the short-circuit protection signal and the overcurrent protection signal of the contactor, the CPLD sends the on-off control signal of the contactor to the coil control circuit of the contactor to drive the contactor to be switched on or off after logical judgment, when the external fault reset signal is effective, the short-circuit fault and the overcurrent fault are cleared, the CPLD transmits a short-circuit protection signal, a contactor on-off control signal and a fault reset signal to the microcontroller through the I/O port, the CPLD divides the frequency of the internal clock, then outputting a heartbeat pulse signal to the microcontroller through an I/O port, wherein the input end of the CPLD is connected with the output end of the comparator, and the output end of the CPLD is connected with the coil control circuit;
the main control process is finished in a CPLD, a microcontroller mainly plays an auxiliary role and sends an instruction to an upper computer through an RS485 bus, signal transmission and current change in the CPLD are transmitted in real time, two latches are arranged in the CPLD, faults such as short circuit or overcurrent are judged firstly, a fault reset signal clears and resets the fault signal through the two latches, various state signals of a contactor enter the CPLD and then are judged, and finally the signals are output to a coil control circuit in the contactor through a control logic in the CPLD to further control the contactor; comparator and latch connection: a short circuit protection signal.
Claims (8)
1. An intelligent control system and a control method for a contactor are characterized in that: the control system comprises a contactor, a CPLD, a microcontroller, a comparator, a differential amplifier, a coil control circuit, an RS485 driver, a management computer and a current divider, wherein the contactor is connected with the CPLD, the CPLD is respectively connected with the microcontroller, the coil control circuit and the comparator, the microcontroller is connected with the RS485 driver and the differential amplifier, the RS485 driver is connected with the management computer, and the differential amplifier is connected with the current divider.
2. An intelligent control system and a control method for a contactor are characterized in that: the control method comprises the following steps:
s1, the management computer sends a contactor on-off control signal and a fault reset processing signal to the CPLD, and the CPLD judges the effectiveness of the contactor on-off control signal and the fault reset processing signal;
s2, transmitting a heartbeat pulse signal to the microcontroller by a time sequence generating unit in the CPLD, and transmitting the heartbeat pulse signal to the CPLD by the microcontroller;
s3, the CPLD receives the overcurrent protection signal transmitted by the microcontroller and latches the fault state;
s4, the current divider converts the current of the distribution line into voltage, compares the voltage with reference voltage, and sends a short-circuit protection signal to the CPLD after the comparison by the comparator;
s5, the CPLD transmits the contactor state, the short-circuit protection state and the CPLD self state to the microcontroller respectively;
s6, enabling a logic control unit in the CPLD to drive a coil control circuit of the contactor to be switched on or off according to the on-off control signal, the short-circuit protection signal and the overcurrent protection signal of the contactor;
s7, the microcontroller reports the state of the contactor, the over-current protection state, the short-circuit protection state and the CPLD state to the upper-level management computer through the communication bus RS485 respectively;
s8, if a fault occurs, the fault reset process signal clears the fault condition in the latch.
3. The intelligent control system and method for the contactor according to claim 2, wherein: in step S1, the validity of the contactor on-off control signal and the fault reset processing signal is determined in a validity determination unit inside the CPLD.
4. The intelligent control system and method for the contactor according to claim 2, wherein: in the step S2, if the CPLD determines that the microcontroller is normal according to the heartbeat pulse signal, the CPLD receives an overcurrent protection signal sent by the microcontroller.
5. The intelligent control system and method for the contactor according to claim 2, wherein: in the step S4, the distribution line is connected to a shunt, the shunt is connected to two input ends of a differential amplifier, and the output end of the differential amplifier is connected to one input end of the microcontroller and one input end of the comparator.
6. The intelligent control system and method for the contactor according to claim 2, wherein: in the step S5, the CPLD is connected to the microcontroller through the I/O port and transmits a signal.
7. The intelligent control system and method for the contactor according to claim 2, wherein: the logic control unit in the step S6 determines that the contactor on-off control signal is valid, and sends a contactor on-off signal to the coil control circuit when the contactor on-off control signal is not valid and there is no short-circuit protection signal or overcurrent protection signal; otherwise, a contactor opening signal is sent out.
8. The intelligent control system and the control method for the contactor according to claim 1, wherein: the CPLD model is 5M160ZE64A 5N; the microcontroller model is TMS320F28035 PNQ.
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| CN201911108639.0A CN110932392B (en) | 2019-11-13 | 2019-11-13 | Intelligent control system and control method for contactor |
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| CN201911108639.0A CN110932392B (en) | 2019-11-13 | 2019-11-13 | Intelligent control system and control method for contactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112623242A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Method for realizing display state of intelligent contactor of aircraft power supply system |
| CN113341854A (en) * | 2021-05-31 | 2021-09-03 | 贵州天义电器有限责任公司 | Power control box information acquisition control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557664A (en) * | 2004-01-16 | 2004-12-29 | 湖南科技大学 | Bus type intelligent sensor set for state monitoring |
| CN1928763A (en) * | 2005-09-05 | 2007-03-14 | 江苏省电力公司常州供电公司 | Monitoring device for main transfer wind cooling system and its working method |
| CN201904608U (en) * | 2010-12-14 | 2011-07-20 | 浙江埃菲生能源科技有限公司 | Direct-current protecting system for photovoltaic inverter |
| CN105042159A (en) * | 2015-07-24 | 2015-11-11 | 苏州市大力电器有限公司 | Electromagnetic valve drive device with fault diagnosis function and self-protection function |
| CN208257378U (en) * | 2018-02-23 | 2018-12-18 | 扬州海通电子科技有限公司 | A kind of multiple-channel output low voltage difference overcurrent protector |
-
2019
- 2019-11-13 CN CN201911108639.0A patent/CN110932392B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557664A (en) * | 2004-01-16 | 2004-12-29 | 湖南科技大学 | Bus type intelligent sensor set for state monitoring |
| CN1928763A (en) * | 2005-09-05 | 2007-03-14 | 江苏省电力公司常州供电公司 | Monitoring device for main transfer wind cooling system and its working method |
| CN201904608U (en) * | 2010-12-14 | 2011-07-20 | 浙江埃菲生能源科技有限公司 | Direct-current protecting system for photovoltaic inverter |
| CN105042159A (en) * | 2015-07-24 | 2015-11-11 | 苏州市大力电器有限公司 | Electromagnetic valve drive device with fault diagnosis function and self-protection function |
| CN208257378U (en) * | 2018-02-23 | 2018-12-18 | 扬州海通电子科技有限公司 | A kind of multiple-channel output low voltage difference overcurrent protector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112623242A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Method for realizing display state of intelligent contactor of aircraft power supply system |
| CN113341854A (en) * | 2021-05-31 | 2021-09-03 | 贵州天义电器有限责任公司 | Power control box information acquisition control system |
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| CN110932392B (en) | 2023-06-16 |
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