CN105186680A - Dual-power intelligent controller - Google Patents
Dual-power intelligent controller Download PDFInfo
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- CN105186680A CN105186680A CN201510651343.9A CN201510651343A CN105186680A CN 105186680 A CN105186680 A CN 105186680A CN 201510651343 A CN201510651343 A CN 201510651343A CN 105186680 A CN105186680 A CN 105186680A
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Abstract
Provided is a dual-power intelligent controller which comprises a MCU central processor and which comprises an AC/DC conversion unit, a power voltage signal acquiring and processing unit, a conversion control unit, a key input display unit, a communication module unit, a fire-fighting linkage control unit, and a UG start control unit that are connected with the MCU central processor. The MCU central processor is a Freescale K30DX64VLH7 32-bit Cotex-m4 processor. The dual-power intelligent controller well solves problems of cost and precision without an external high-precision ADC. Two independent ADC modules, a DMA controller, and a PIT timer which are built in the MCU central processor are reasonably used for sampling and processing a power voltage signal and sampling and processing 512 data points within a single power voltage cycle. Further, a frequency self-adaptive algorithm achieves the computation of the instantaneous value and the effective value of power voltage with 50Hz or 60Hz. The dual-power intelligent controller may give a switching signal within a haft cycle and guarantees the load switching of dual power supplies within the shortest time.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus, particularly relate to a kind of intelligent controller of double power supply automatic transfer switch.
Background technology
Double power supply automatic transfer switch is a kind of conventional low-voltage electrical apparatus, be usually used in the mutual conversion between conventional power supply and stand-by power supply, when conventional power supply be monitored to there is deviation time double power supply automatic transfer switch and automatic by load from conventional Power convert to stand-by power supply, if when conventional power up is normal, then automatic load is turned back to conventional Power supply, to ensure when a road power failure or when stopping power supply, another road power supply can switch rapidly, to guarantee load circuit normal power supply.The intelligent controller of double power supply automatic transfer switch shoulders the fill order that fault-signal detects and enforcement is changed to power supply, along with people are more and more higher to the reliability requirement of electric power system in production and life, the function setting of double power supply automatic transfer switch is got more and more, the intelligent controller of traditional double power automatic transfer switch is due to the restriction of microprocessor function, need to arrange many hardware to coordinate with it, simultaneously also inadequate to the monitoring accuracy of supply voltage, easy generation conversion erroneous judgement, these defects, have a strong impact on the functional reliability of duplicate supply.
Summary of the invention
The object of the invention is to the deficiency overcoming conventional art, provide a kind of powerful, conversion accuracy is high, the double-power intelligent controller of stable work in work.
For achieving the above object, the technical solution used in the present invention is: a kind of double-power intelligent controller, comprise voltage signal acquisition and processing unit, the TCU transfer control unit of MCU central processing unit and the AC/DC ac-dc conversion unit be attached thereto, conventional power supply and stand-by power supply, it is characterized in that: the K30DX64VLH732 position Cotex-m4 processor of freescale selected by described MCU central processing unit.
Further setting, after the line voltage signal that described AC/DC ac-dc conversion unit adopts two power transformers to obtain conventional power supply and stand-by power supply respectively exports half-wave rectifying circuit, rc filter circuit and voltage stabilizing circuit to after decompression transformation, the direct voltage of stable output is that DC power supply put forward by the active circuit of described intelligent controller.
Further setting, described voltage signal acquisition and processing unit comprise voltage signal acquisition unit and signal processing unit, described voltage signal acquisition unit adopts 4 groups of identical circuit two groups of line voltage signals to conventional power supply and stand-by power supply to sample, and exports described signal processing unit to through current mode voltage transformer isolated buck.
Further setting, described signal processing unit adopts second order active low-pass filter circuit, interference signal beyond attenuation measurement frequency band range, the input of two built-in ADC analog to digital converters of MCU central processing unit and built-in two the CMP comparator input terminals of MCU central processing unit are outputted to respectively, for the measurement of voltage and frequency after filtering is carried out to two groups of line voltage signals of required conventional power supply and stand-by power supply.
Further setting, two groups of line voltage signals of the conventional power supply that described signal processing unit exports and stand-by power supply are connected respectively to the input of two built-in ADC analog to digital converters of MCU central processing unit, described ADC analog to digital converter triggered by the PIT timer of conventional power supply and stand-by power supply respectively and conversion, respective DMA data transfer controller is triggered again respectively after two-way ADC analog to digital converter converts, the transformation result of ADC analog to digital converter is automatically transferred to RAM memory built-in separately by DMA data transfer controller, realize 512 point samplings to signal voltage each cycle, namely square calculating and preserving interim result of calculation of a secondary data is carried out to transformation result when MCU central processing unit detects after DMA data transmit end interrupt request, namely the judgement to the conversion of power supply decompression is carried out after half period sampled signal being detected, to realize the Power convert completed on electrically within the shortest time dual power supply load, after completing a voltage sample period, carry out an effective value calculate accurately show that conventional power supply and stand-by power supply sample the effective value of phase voltage, and by a kind of mathematical operation, draw the effective value of conventional power supply and each phase voltage of stand-by power supply.
Further setting, two groups of line voltage signals of the conventional power supply that described signal processing unit exports and stand-by power supply are connected respectively to the in-phase input end of two built-in CMP comparators of MCU central processing unit, the reverse input end of two CMP comparators is connected to the output of the built-in DAC digital to analog converter of MCU central processing unit, two built-in CMP comparator output terminals are connected to the input channel 0 of two built-in FTM timer conters and the input of input channel 1, FTM timer conter is by counting the output of CMP comparator, then computing is carried out to signal processing unit, thus draw the frequency signal of power supply and output to display unit, simultaneously using this frequency signal also as the timing cycle adjusting condition of PIT sample clock generator, the sample conversion cycle of the ADC analog to digital converter of power supply and stand-by power supply commonly used by control MCU central processing unit.
Further setting, described MCU central processing unit has frequency self-adaption function, the frequency signal of conventional power supply exported from signal processing unit, also as the timing cycle adjusting condition of PIT0 sample clock generator, commonly uses the change-over period of power supply ADC0 analog to digital converter for control MCU central processing unit.The frequency signal of stand-by power supply exported from signal processing unit also as the adjusting condition of the timing cycle of PIT1 sample clock generator, for the ADC1 analog to digital converter change-over period of control MCU central processing unit stand-by power supply.Realize the sampling of voltage signal each cycle 512 to different frequency and the calculating of effective value, to complete the calculating of each phase voltage value under 50Hz or 60Hz supply frequency.
The beneficial effect that double-power intelligent controller of the present invention has is: because the MCU central processing unit in double-power intelligent controller employs K30DX64VLH732 position Cotex-m4 processor, because the conversion accuracy of its built-in ADC analog to digital converter reaches 16, the present invention is made well to solve the problem of cost and precision, outstanding advantages of the present invention is by ADC analog to digital converter built-in for MCU central processing unit simultaneously, DMA data transfer controller, CMP comparator has carried out the application of novelty in duplicate supply control field, such as take two built-in ADC analog to digital converters of MCU central processing unit respectively in the voltage sampling signal process of conventional power supply and stand-by power supply, respective DMA data transfer controller is triggered again respectively after two-way ADC analog to digital converter converts, the transformation result of ADC analog to digital converter is automatically transferred to RAM memory built-in separately by DMA data transfer controller, and enabled the effective value computing of Cycle by Cycle 512 by a kind of algorithm of suing for peace and obtained the effective value of conventional power supply and stand-by power supply phase voltage, the conventional power supply exported through signal processing unit and the voltage signal of stand-by power supply output to the in-phase input end of the built-in comparator of MCU central processing unit CMP respectively, the reverse input end of CMP comparator is connected to the output of the built-in DAC digital to analog converter of MCU central processing unit, the output of CMP comparator is connected to built-in FTM timer conter input channel, counted by the output of FTM timer conter to CMP comparator, thus draw the frequency values of conventional power supply and stand-by power supply, whole process control completes automatically by hardware, owing to carrying out the high-speed sampling of 512 at each voltage cycle, the judgement no-voltage fault of Double-power controller can be foreshortened to half period, electrical control achieves the load supplying conversion completing conventional power supply and stand-by power supply within the shortest time, MCU central processing unit of the present invention does not need to increase other outer circuits simultaneously, frequency self-adaption function can be realized easily.
Accompanying drawing explanation
fig. 1for principle of the invention square frame
figure;
fig. 2for
fig. 1mCU CPU line principle
figure;
fig. 3for
fig. 1aC/DC AC-DC conversion unit line principle
figure;
fig. 4for
fig. 1the voltage acquisition unit line principle of voltage acquisition converter unit
figure;
fig. 5for
fig. 1the signal processing unit line principle body of voltage acquisition converter unit;
fig. 6for
fig. 1voltage signal acquisition output principle frame
figure;
fig. 7for frequency signal gathers output principle frame
figure;
fig. 8for the line principle of TCU transfer control unit stand-by power supply
figure.
Embodiment
In conjunction with
fig. 1~
fig. 8, by specific embodiment, the invention will be further described.
A kind of double-power intelligent controller,
as Fig. 1,
fig. 2shown in, comprise MCU central processing unit, the conventional power supply be connected with MCU central processing unit input and the voltage signal acquisition of stand-by power supply and processing unit, AC/DC ac-dc conversion unit, TCU transfer control unit, key-press input display unit, communication module unit, fire protection linkage control unit and UG start control unit, and the K30DX64VLH732 position Cotex-m4 processor of freescale selected by described MCU central processing unit.
Further setting, described AC/DC ac-dc conversion unit
as Fig. 3shown in, pass through N
a, N
bu is obtained from conventional power end
abline voltage suppresses through piezo-resistance RV2 surge voltage, by transformer T3 reduced output voltage, after the suppression of piezo-resistance RV5 surge voltage, D3, D4 halfwave rectifier, capacitor filtering and the voltage stabilizing circuit that is made up of U2, the active circuit being described intelligent controller by the 5V direct voltage of VCC, GND stable output provides 5V DC power supply, passes through E
a, E
bu is obtained from standby electricity source
abline voltage suppresses through piezo-resistance RV3 surge voltage, by transformer T2 reduced output voltage, after the suppression of piezo-resistance RV4 surge voltage, D1, D2 halfwave rectifier, capacitor filtering and the voltage stabilizing circuit that is made up of U2, the active circuit being described intelligent controller by the 5V direct voltage of VCC, GND stable output provides 5V DC power supply, and the active circuit being simultaneously described intelligent controller by same method provides various galvanic current voltage source.
Further setting, described signals collecting converter unit comprises voltage acquisition unit and signal processing unit, described voltage acquisition unit
as Fig. 4shown in, it arranges 4 groups of same sample circuits, passes through U
iN-N
a, U
iN-N
bu is obtained from conventional power end
abline voltage signal, input current type voltage transformer T1 after a series of resistance current limliting, exports U after the limit value protective circuit be made up of via voltage-stabiliser tube TVS1 current mode voltage transformer T1 reduced output voltage required voltage signal
abline voltage signal, to described signal processing unit, collects the U of conventional power end simultaneously by same method
bcthe U of line voltage signal and stand-by power supply
ab, U
bcexport described signal processing unit to after line voltage signal, described current mode voltage transformer has the advantages that volume is little, conversion accuracy is high.
Further setting,
as Fig. 5shown in, from the conventional power supply U that voltage acquisition unit exports
abline voltage sampling signal, described signal processing unit is entered into by NA-IN and VREF, this signal processing unit adopts second order active low-pass filter circuit, export the NA voltage signal of conventional power supply from NA-OUT after signal measures the interference signal beyond frequency band range by algorithm, obtain exporting the conventional NB voltage signal of power supply and the EA of stand-by power supply from NB-OUT by same method, EB voltage signal, this NA, NB, EA, EB voltage signal exports input and built-in two CMP comparator input terminals of two built-in ADC analog to digital converters of MCU central processing unit to, for the measurement of voltage and frequency.
Further setting,
as Fig. 6shown in, the voltage signal NA of the conventional power supply that described signal processing unit exports, NB is input to the ADC0 analog to digital converter of MCU central processing unit by NA-OUT and NB-OUT, the EA of described stand-by power supply, EB voltage signal is input to the ADC1 analog to digital converter of MCU central processing unit by EA-OUT and EB-OUT, described ADC0 analog to digital converter by commonly use power supply timer PIT0 trigger and conversion, described ADC1 analog to digital converter by stand-by power supply timer PIT1 trigger and conversion, DMA-CH4 ~ DMA-CH7 passage of DMA data transfer controller is triggered again after the timer PIT0 of conventional power supply triggers and starts conversion, DMA-CH8 ~ DMA-CH11 passage is triggered again after the PIT1 timer of stand-by power supply triggers and starts conversion, the transformation result of DMA data transfer controller and ADC1 transducer is automatically transferred to built-in SRAM memory simultaneously, namely square calculating and preserving interim result of calculation of a secondary data is carried out to transformation result when MCU central processing unit detects after DMA data transmit end interrupt request, namely the judgement of power supply decompression is carried out after obtaining half period sampled signal, the judgement no-voltage fault of Double-power controller is made to foreshorten to half period, electrical control achieves the load supplying conversion completing conventional power supply and stand-by power supply within the shortest time, after completing one-period sampled signal, carry out an effective value calculating and be multiplied by a coefficient to each effective value drawing conventional power supply AB phase voltage effective value NA-OUT and BC phase voltage effective value NB – OUT, and by a kind of mathematical operation program, draw conventional power supply AC phase voltage effective value NC-OUT, described conventional power supply AB, BC, the effective value of each phase voltage of AC is from NA-Ui, NB-Ui, NC-Ui exports, described stand-by power supply AB, BC, the effective value of each phase voltage of AC is from EA-Ui, EB-Ui, EC-Ui exports.
Further setting,
as Fig. 6,
fig. 7shown in, the voltage signal of the conventional power supply that described signal processing unit exports and stand-by power supply is input to the in-phase input end of the built-in CMP comparator of MCU central processing unit two by NA-OUT and EA-OUT, the reverse input end of CMP comparator is connected to the output of the built-in DAC digital to analog converter of MCU central processing unit, the output of two CMP comparators is connected respectively to built-in FTM timer conter input channel CH0 and input channel CH1, FTM timer conter is by counting the input of CMP comparator, thus draw the frequency signal of conventional power supply and stand-by power supply, the frequency signal of described conventional power supply commonly uses the change-over period of the ADC0 analog to digital converter of power supply by PIT0 Timer Controlling MCU central processing unit, the frequency signal of described stand-by power supply power supply passes through the change-over period of the ADC1 analog to digital converter of PIT1 Timer Controlling MCU central processing unit stand-by power supply, export frequency signal to display unit simultaneously.
Further setting,
as Fig. 6,
fig. 7shown in, described MCU central processing unit has frequency self-adaption function, the frequency signal of described conventional power supply outputs to display unit, this frequency signal is also as the timing cycle adjusting condition of PIT0 sample clock generator simultaneously, thus the change-over period of power supply ADC0 analog to digital converter commonly used by control MCU central processing unit.The frequency signal of described stand-by power supply is also as the timing cycle adjusting condition of PIT1 sample clock generator, thus the ADC1 analog to digital converter change-over period of control MCU central processing unit stand-by power supply.This to detect frequency signal as regulating in real time the adaptive polo placement wanting the method in detectable voltage signals sampling period to realize voltage effective value under different electrical power frequency by adopting.
Further setting, TCU transfer control unit is made up of the silicon controlled control circuit commonly using power supply identical with two groups of stand-by power supply,
as Fig. 8shown in, the silicon controlled control circuit of described stand-by power supply comprises Q1, Q2 controllable silicon, diode D8, D9, D10, export the topological structure H-bridge circuit that sustained diode 11 is formed, photoisolator U4, U5, resistance R15, R16, R17, R18, R19, rectifier diode D6, D7, the thyristor gating circuit of composition, the standby electric changeover control signal CH1 that MCU central processing unit exports is connected to the input of photoisolator through level shifting circuit, the output of photoisolator is connected to thyristor gating circuit and controls the conducting of controllable silicon Q1 and Q2, if export control signal conducting controllable silicon Q1 and Q2 when described MCU processor is checked through and meets switch condition after conventional supply voltage fault, there is provided power supply to realize the load supplying conversion of stand-by power supply to the electromagnet of change over switch main body mechanism, silicon controlled control circuit and the conversion method of conventional power supply realize with above-mentioned same method.
Working procedure of the present invention is as follows: first carry out initialization to each peripheral hardware register of MCU central processing unit, read the frequency of power supply, the normal operating value scope of supply power voltage that prestore, this value also can be arranged by button or revise, and then carries out the processes such as supply voltage sampling, conversion, filtering, AD conversion, effective value calculating, breakdown judge and output switching control.Signal processing flow is as follows: conventional power supply collects U
ab, U
bcline voltage signal, through voltage transformer step-down, exports voltage signal processing unit to, and at described signal processing unit through second order active low-pass filter circuit, the interference signal beyond attenuation measurement frequency band range, to the U of required conventional power supply
ab, U
bcline voltage signal outputs to the input of two built-in ADC analog to digital converters of MCU central processing unit respectively after carrying out filtering, described ADC analog to digital converter respectively by conventional power supply PIT timer trigger and conversion, respective DMA data transfer controller is triggered again respectively after two-way ADC analog to digital converter converts, the transformation result of ADC analog to digital converter is automatically transferred to RAM memory built-in separately by DMA data transfer controller, realize 512 point samplings to signal voltage each cycle, namely square calculating and preserving interim result of calculation of a secondary data is carried out to transformation result when MCU central processing unit detects after DMA data transmit end interrupt request, namely the judgement to the conversion of power supply decompression is carried out after half period sampled signal being detected, if this signal is not within the scope of the normal voltage value of supply power voltage, meet the condition of decompression conversion, namely the CH0 end of described TCU transfer control unit is output control signals to, this control signal and conducting photoisolator U4, U5, described photoisolator U4, U5 then outputs control signals to silicon controlled and controls pole, make controllable silicon Q1, Q2 conducting, electromagnet on described Double-power controller body obtains electric, load transfer duplicate supply being commonly used power supply with manual converting mechanism within the shortest time is powered to stand-by power supply, the control signal meeting decompression switch condition is exported to fire protection linkage control unit to realize the control of fire-fighting link simultaneously, if stand-by power supply is generating set, this decompression changeover control signal exports generating set to and automatically starts power electric generator, namely automatic after the voltage exported when generator reaches power reguirements load transfer to be powered to stand-by power supply, if detect that the sampled signal of conventional power supply is after the normal voltage value scope of supply power voltage, then control load automatically switches to conventional power supply by stand-by power supply, continued to power to the load by conventional power supply, by working procedure same above, load can be completed and be transformed into conventional power supply from stand-by power supply, this double-power intelligent controller also communicates with host computer by described DCOM unit, to realize intelligent management.
It should be noted that: obviously; above-described embodiment is only for example of the present invention is clearly described; and the restriction not to execution mode; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here exhaustive without the need to also giving all execution modes, and thus the apparent change of extending out or variation be still among protection scope of the present invention.
Claims (7)
1. a double-power intelligent controller, comprise voltage signal acquisition and processing unit, the TCU transfer control unit of MCU central processing unit and the AC/DC ac-dc conversion unit be attached thereto, conventional power supply and stand-by power supply, it is characterized in that: the K30DX64VLH732 position Cotex-m4 processor of freescale selected by described MCU central processing unit.
2. double-power intelligent controller according to claim 1, is characterized in that: after the line voltage signal that described AC/DC ac-dc conversion unit adopts two power transformers to obtain conventional power supply and stand-by power supply respectively exports half-wave rectifying circuit, rc filter circuit and voltage stabilizing circuit to after decompression transformation, the direct voltage of stable output is that DC power supply put forward by the active circuit of described intelligent controller.
3. double-power intelligent controller according to claim 1, it is characterized in that: described voltage signal acquisition and processing unit comprise voltage signal acquisition unit and signal processing unit, described voltage signal acquisition unit adopts 4 groups of identical circuit two groups of line voltage signals to conventional power supply and stand-by power supply to sample, and exports described signal processing unit to through current mode voltage transformer isolated buck.
4. double-power intelligent controller according to claim 3, it is characterized in that: described signal processing unit adopts second order active low-pass filter circuit, interference signal beyond attenuation measurement frequency band range, the input of two built-in ADC analog to digital converters of MCU central processing unit and built-in two the CMP comparator input terminals of MCU central processing unit are outputted to respectively, for the measurement of voltage and frequency after filtering is carried out to two groups of line voltage signals of required conventional power supply and stand-by power supply.
5. double-power intelligent controller according to claim 4, it is characterized in that: two groups of line voltage signals of the conventional power supply that described signal processing unit exports and stand-by power supply are connected respectively to the input of two built-in ADC analog to digital converters of MCU central processing unit, described ADC analog to digital converter triggered by the PIT timer of conventional power supply and stand-by power supply respectively and conversion, respective DMA data transfer controller is triggered again respectively after two-way ADC analog to digital converter converts, the transformation result of ADC analog to digital converter is automatically transferred to RAM memory built-in separately by DMA data transfer controller, realize 512 point samplings to signal voltage each cycle, namely square calculating and preserving interim result of calculation of a secondary data is carried out to transformation result when MCU central processing unit detects after DMA data transmit end interrupt request, namely the judgement to the conversion of power supply decompression is carried out after half period sampled signal being detected, to realize the Power convert completed on electrically within the shortest time dual power supply load, after completing a voltage sample period, carry out an effective value calculate accurately show that conventional power supply and stand-by power supply sample the effective value of phase voltage, and by a kind of mathematical operation, draw the effective value of conventional power supply and each phase voltage of stand-by power supply.
6. double-power intelligent controller according to claim 4, it is characterized in that: two groups of line voltage signals of the conventional power supply that described signal processing unit exports and stand-by power supply are connected respectively to the in-phase input end of two built-in CMP comparators of MCU central processing unit, the reverse input end of two CMP comparators is connected to the output of the built-in DAC digital to analog converter of MCU central processing unit, two built-in CMP comparator output terminals are connected to the input channel 0 of two built-in FTM timer conters and the input of input channel 1, FTM timer conter is by counting the output of CMP comparator, then computing is carried out to signal processing unit, thus draw the frequency signal of power supply and output to display unit, simultaneously using this frequency signal also as the adjusting condition of the timing cycle of PIT sample clock generator, carry out the change-over period that the ADC analog to digital converter of power supply and stand-by power supply commonly used by control MCU central processing unit.
7. double-power intelligent controller according to claim 1, it is characterized in that: described MCU central processing unit has frequency self-adaption function, the frequency signal of conventional power supply exported from signal processing unit is also as the timing cycle adjusting condition of PIT0 sample clock generator, thus the power supply ADC0 analog to digital converter change-over period commonly used by control MCU central processing unit.The frequency signal of stand-by power supply exported from signal processing unit is also as the timing cycle adjusting condition of PIT1 sample clock generator, thus the ADC1 analog to digital converter change-over period of control MCU central processing unit stand-by power supply.Realize the sampling of voltage signal each cycle 512 to different frequency and the calculating of effective value, to complete the calculating of each phase voltage value under 50Hz or 60Hz supply frequency.
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| CN110165876A (en) * | 2019-05-15 | 2019-08-23 | 昆山龙腾光电有限公司 | Power supply circuit and its electronic equipment |
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| CN111313530A (en) * | 2020-03-12 | 2020-06-19 | 厦门宏发电气有限公司 | Emergency lighting power distribution device |
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| Publication number | Publication date |
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| CN105186680B (en) | 2018-11-23 |
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