CN105186680B - A kind of double-power intelligent controller - Google Patents
A kind of double-power intelligent controller Download PDFInfo
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- CN105186680B CN105186680B CN201510651343.9A CN201510651343A CN105186680B CN 105186680 B CN105186680 B CN 105186680B CN 201510651343 A CN201510651343 A CN 201510651343A CN 105186680 B CN105186680 B CN 105186680B
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Abstract
A kind of double-power intelligent controller,Including MCU central processing unit and the AC/DC converter unit being attached thereto,Power supply voltage signal acquisition and processing unit,TCU transfer control unit,Key-press input display unit,Communication module unit,Fire protection linkage control unit and UG start control unit,The position the K30DX64VLH732 Cotex-m4 processor of MCU selection freescale,Very good solution cost and precision problem in the case where being not required to external high-precision adc,Two independent ADC module built in MCU are reasonably utilized in this programme,Dma controller,The sampling and processing of PIT timer completion power supply voltage signal,Realize 512 points of data sampling and processing within the supply voltage monocycle,The calculating of the instantaneous value and virtual value of 50HZ or 60HZ different frequency supply voltage is realized by a kind of frequency adaptive algorithm simultaneously,Conversion signal can be issued in half period,It ensure that load of the dual power supply in the shortest time switches.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus more particularly to a kind of intelligent controllers of double power supply automatic transfer switch.
Background technique
Double power supply automatic transfer switch is a kind of common low-voltage electrical apparatus, is usually used between common power supply and backup power source
Conversion mutually, when common power supply, which is monitored to, deviation occurs, double power supply automatic transfer switch will be loaded from common power supply automatically
It is transformed into backup power source, if common power up is normal, automatically by load back to common power supply power supply, to guarantee to work as
When power failure or stopping are powered all the way, another way power supply can be switched over rapidly, to ensure load circuit normal power supply.
The intelligent controller of double power supply automatic transfer switch shoulders the fault-signal detection to power supply and implements the execution of conversion
Order, as people are higher and higher to the reliability requirement of power supply system in production and life, opens double power-supply automatic transferring
The function setting of pass is more and more, the limit of the intelligent controller of traditional double power supply automatic transfer switch due to microprocessor function
System, needs to be arranged that many hardware is matched, while also inadequate to the monitoring accuracy of supply voltage, is easy to produce conversion and misses
Sentence, these defects have seriously affected the functional reliability of dual power supply.
Summary of the invention
It is an object of the invention to overcome the shortcomings of traditional technology, a kind of powerful, conversion accuracy height, workability are provided
The stable double-power intelligent controller of energy.
To achieve the above object, the technical solution adopted by the present invention is that：A kind of double-power intelligent controller, including in MCU
Central processor and the AC/DC converter unit being attached thereto, common power supply and the signal acquisition and processing unit of backup power source, conversion
Control unit, it is characterized in that：The MCU central processing unit is selected at 32 Cotex-m4 of K30DX64VLH7 of freescale
Manage device.
Further setting, the AC/DC converter unit are obtained respectively using two power transformers and commonly use power supply and standby
It is exported after being exported after decompression transformation to half-wave rectifying circuit, rc filter circuit and voltage regulator circuit with the line voltage signal of power supply
Steady dc voltage provides DC power supply for the active circuit of the intelligent controller.
Further setting, the signal acquisition and processing unit include voltage signal acquisition unit and signal processing list
Member, the voltage signal acquisition unit are believed using two groups of line voltages of 4 groups of identical circuits to common power supply and backup power source
It number is sampled, exports through current mode voltage transformer isolated buck to the signal processing unit.
Further setting, the signal processing unit use second order active low-pass filter circuit, attenuation measurement frequency band model
Interference signal other than enclosing exports respectively after being filtered to two groups of line voltage signals of required common power supply and backup power source
To two CMP ratios built in the input terminal and MCU central processing unit of two ADC analog-digital converters built in MCU central processing unit
Measurement compared with device input terminal, for voltage and frequency.
Further setting, the common power supply of the signal processing unit output and two groups of line voltage signals point of backup power source
It is not connected to the input terminal of two ADC analog-digital converter modules built in MCU central processing unit, the ADC analog-digital converter point
Not by the PIT timers trigger of commonly using power supply and backup power source and convert, two ADC analog-digital converters convert after again
Trigger respective DMA data transfer control respectively, DMA data transfer control by the transformation result of ADC analog-digital converter from
It is dynamic to be transferred to respectively built-in RAM memory, 512 point samplings to signal voltage each cycle are realized, when MCU central processing unit is examined
Square calculating an of data is carried out to transformation result after measuring DMA data transmission end interrupt request and saves interim meter
It calculates as a result, the judgement to the conversion of power supply decompression is carried out when detect half period sampled signal after, with realization when shorter
It is interior electrically to complete to convert the power supply that dual power supply loads, once had after completing a voltage sample period
Valid value calculates the virtual value accurately to obtain common power supply and backup power source sampling phase voltage, and by a kind of mathematical operation, obtains
The virtual value of power supply and each phase voltage of backup power source is commonly used out.
Further setting, the common power supply of the signal processing unit output and two groups of line voltage signals point of backup power source
It is not connected to the non-inverting input terminal of two CMP comparators built in MCU central processing unit, the reversed input of two CMP comparators
End is connected to the output end of the DAC digital analog converter built in MCU central processing unit, and two built-in CMP comparator output terminals connect
Be connected to the input channel 0 of two built-in FTM timer conters and the input terminal of input channel 1, FTM timer conter by pair
The output of CMP comparator is counted, and then carries out operation to signal processing unit, to obtain the frequency signal of power supply and defeated
Display unit is arrived out, while the frequency signal being also used as to the timing cycle adjusting condition of PIT sample clock generator, is controlled in MCU
Central processor often uses the sample conversion period of the ADC analog-digital converter of power supply and backup power source.
Further setting, the MCU central processing unit have frequency adaptation function, export from signal processing unit
The frequency signal of common power supply is also used as the timing cycle adjusting condition of PIT0 sample clock generator, to control MCU central processing
Device often uses the change-over period of power supply ADC0 analog-digital converter；The frequency signal of the backup power source exported from signal processing unit is also made
For the adjusting condition of the timing cycle of PIT1 sample clock generator, to control the ADC1 modulus of MCU central processing unit backup power source
The converter change-over period；The detectable voltage signals sampling period is wanted to detect frequency signal as real-time adjusting by using this
Method is realized to 512 points of voltage signal each cycle of sampling of different frequency and the adaptive polo placement of virtual value, to complete 50Hz
Or the calculating of each phase voltage value under 60Hz different electrical power frequency.
Double-power intelligent controller of the present invention has an advantageous effect in that：Due to the MCU in double-power intelligent controller
Central processing unit has used 32 Cotex-m4 processors of K30DX64VLH7, and the ADC analog-digital converter as built in it turns
Change precision and reach 16 so that the problem of very good solution of the present invention cost and precision, while outstanding advantages of the present invention be by
ADC analog-digital converter, DMA data transfer control, CMP comparator built in MCU central processing unit is in dual power supply control field
It is middle to have carried out innovative application, for example occupied in MCU respectively in the voltage sampling signal processing of common power supply and backup power source
Two ADC analog-digital converters built in central processor, two ADC analog-digital converters trigger respective respectively again after converting
The transformation result of ADC analog-digital converter is automatically transferred in respectively by DMA data transfer control, DMA data transfer control
The RAM memory set, and commonly used by the virtual value operation that a kind of summation algorithm enables to complete 512 points of Cycle by Cycle
The virtual value of power supply and backup power source phase voltage；The voltage signal of common power supply and backup power source through signal processing unit output
It is respectively outputted to the non-inverting input terminal of comparator built in MCU central processing unit CMP, the reverse input end of CMP comparator is connected to
The output end of DAC digital analog converter built in MCU central processing unit, the output end of CMP comparator are connected to built-in FTM timer counter
Device input channel counts the output of CMP comparator by FTM timer conter, to obtain common power supply and spare
The frequency values of power supply, whole process control are automatically performed by hardware, since the high speed for carrying out at 512 points in each voltage cycle is adopted
The judgement no-voltage fault of Double-power controller can be foreshortened to half period, realized in electrical control shorter by sample
The load supplying conversion of common power supply and backup power source is completed in time, while MCU central processing unit of the present invention is not required to
Increase other outer circuits, realize frequency adaptation function with can be convenient.
Detailed description of the invention
Fig. 1 is principle of the invention block diagram；
Fig. 2 is Fig. 1 MCU central processing unit schematic circuit；
Fig. 3 is Fig. 1 AC/DC converter unit schematic circuit；
Fig. 4 is the voltage acquisition schematic circuit of Fig. 1 signal acquisition and processing unit；
Fig. 5 is the signal processing circuit schematic diagram of Fig. 1 signal acquisition and processing unit；
Fig. 6 is the voltage signal output principle block diagram of Fig. 1 signal acquisition and processing unit；
Fig. 7 is the frequency signal output principle block diagram of Fig. 1 signal acquisition and processing unit；
Fig. 8 is the schematic circuit of Fig. 1 TCU transfer control unit backup power source.
Specific embodiment
In conjunction with FIG. 1 to FIG. 8, by specific embodiment, the invention will be further described.
A kind of double-power intelligent controller, as shown in Figure 1 and Figure 2, including MCU central processing unit, with MCU central processing unit
Signal acquisition and processing unit, AC/DC converter unit, the TCU transfer control unit, key of connected common power supply and backup power source
Input unit, LED display unit, communication module unit, fire protection linkage control unit and UG start control unit, the MCU
32 Cotex-m4 processors of K30DX64VLH7 of central processing unit selection freescale.
Further setting, the AC/DC converter unit is as shown in figure 3, pass through NA、NBU is obtained from common power endabLine electricity
Pressure inhibits through varistor RV2 surge voltage, by transformer T3 reduced output voltage, through the inhibition of varistor RV5 surge voltage, D3,
After D4 halfwave rectifier, capacitor filtering and the voltage regulator circuit that is made of U2, stable 5V DC voltage is exported as institute by VCC, GND
The active circuit for stating intelligent controller provides 5V DC power supply, passes through EA、EBU is obtained from standby electricity sourceabLine voltage is through pressure-sensitive
Resistance RV3 surge voltage inhibits, whole through the inhibition of varistor RV4 surge voltage, D1, D2 half-wave by transformer T2 reduced output voltage
After stream, capacitor filtering and the voltage regulator circuit that is made of U2, exporting stable 5V DC voltage by VCC, GND is that the intelligence is controlled
The active circuit of device processed provides 5V DC power supply, while the active circuit for the intelligent controller provides by the same method
Various steady dc voltage power supplys.
Further setting, the signal acquisition and processing unit include voltage acquisition unit and signal processing unit, institute
The voltage acquisition unit stated is as shown in figure 5, its 4 groups of same sample circuit of setting, passes through Uin–NA、Uin-NBFrom common power end
Obtain UabLine voltage signal, a series of input current type voltage transformer T1 after resistance current limlitings, by current mode voltage transformer
U is exported after the limit value protection circuit that voltage signal needed for T1 reduced output voltage is formed via voltage-stabiliser tube TVS1abLine voltage signal is to institute
The signal processing unit stated, while the U of common power end is collected by the same methodbcLine voltage signal and backup power source
Uab、UbcOutput is to the signal processing unit after line voltage signal, the current mode voltage transformer have it is small in size, turn
Change feature with high accuracy.
Further setting, as shown in figure 4, the common power supply U exported from voltage acquisition unitabLine voltage sampled signal leads to
It crosses NA-IN and VREF and enters the signal processing unit, which uses second order active low-pass filter circuit,
Signal exports the NA voltage signal for commonly using power supply from NA-OUT after measuring the interference signal other than frequency range by algorithm,
It obtains exporting the NB voltage signal of common power supply and EA, EB voltage signal of backup power source from NB-OUT by the same method,
NA, NB, EA, EB voltage signal is exported to the input terminal of two ADC analog-digital converters built in MCU central processing unit and built-in
Two CMP comparator input terminals, the measurement for voltage and frequency.
Further setting, as shown in fig. 6, voltage signal NA, NB of the common power supply of signal processing unit output are logical
Cross the ADC0 analog-digital converter that NA-OUT and NB-OUT is input to MCU central processing unit, EA, EB voltage letter of the backup power source
The ADC1 analog-digital converter of MCU central processing unit, the ADC0 analog-digital converter number are input to by EA-OUT and EB-OUT
By commonly use power supply timer PIT0 triggering and convert, the ADC1 analog-digital converter by backup power source timer
PIT1 is triggered and is started to convert, and triggers DMA data transmission control again after the timer PIT0 of common power supply is triggered and starts conversion
The channel DMA-CH4~DMA-CH7 of device processed, when backup power source PIT1 timers trigger and start conversion after trigger DMA- again
The channel CH8~DMA-CH11, at the same the transformation result of DMA data transfer control and ADC1 converter be automatically transferred to it is built-in
SRAM memory carries out transformation result after MCU central processing unit detects DMA data transmission end interrupt request primary
Square calculating of data simultaneously saves interim calculated result, and power supply decompression is carried out after obtaining half period sampled signal and is sentenced
It is disconnected, so that the judgement no-voltage fault of Double-power controller is foreshortened to half period, is realized in electrical control in the shorter time
The interior load supplying conversion for completing common power supply and backup power source, carries out a virtual value after completing a cycle sampled signal
It calculates and common power supply AB line voltage virtual value NA-OUT and BC line voltage is effective to be shown multiplied by a coefficient to each virtual value
Value NB-OUT, and by a kind of mathematical operation program, obtain common power supply AC line voltage virtual value NC-OUT, the common power supply
The virtual value of each line voltage of AB, BC, AC is exported from NA-Ui, NB-Ui, NC-Ui, each line voltage of backup power source AB, BC, AC
Virtual value from EA-Ui, EB-Ui, EC-Ui export.
Further setting, as shown in Figure 6, Figure 7, the common power supply of the signal processing unit output and the electricity of backup power source
Pressure signal is input to the non-inverting input terminal of MCU central processing unit two built-in CMP comparators, CMP by NA-OUT and EA-OUT
The reverse input end of comparator is connected to the output end of DAC digital analog converter built in MCU central processing unit, two CMP comparators
Output end be connected respectively to built-in FTM timer conter input channel CH0 and input channel CH1, FTM timer conter passes through
The input of CMP comparator is counted, thus obtain the frequency signal of common power supply and backup power source, the common power supply
Frequency signal often uses the change-over period of the ADC0 analog-digital converter of power supply, institute by PIT0 Timer Controlling MCU central processing unit
The frequency signal for stating backup power source power supply passes through the ADC1 analog-to-digital conversion of PIT1 Timer Controlling MCU central processing unit backup power source
The change-over period of device, while frequency signal being exported to display unit, while the frequency signal is also used as PIT sample clock generator
Timing cycle adjusting condition, control MCU central processing unit often use the sample conversion of the ADC analog-digital converter of power supply and backup power source
Period.
Further setting, as shown in Figure 6, Figure 7, the MCU central processing unit have frequency adaptation function, described common
The frequency signal of power supply is output to display unit, while the frequency signal is also used as the timing cycle of PIT0 sample clock generator to adjust
Condition, so that the change-over period that MCU central processing unit often uses power supply ADC0 analog-digital converter is controlled, the frequency of the backup power source
Signal is also used as the timing cycle adjusting condition of PIT1 sample clock generator, to control MCU central processing unit backup power source
The ADC1 analog-digital converter change-over period wants detectable voltage signals to adopt by using this to detect frequency signal as real-time adjusting
The method in sample period realizes 512 points of each cycle of sampling and the adaptive polo placement of voltage effective value under different electrical power frequency, with complete
At the calculating of each phase voltage value under 50Hz or 60Hz supply frequency.
Further setting, the TCU transfer control unit by commonly use power supply and backup power source two groups of identical SCR controls
Circuit composition, as shown in figure 8, the silicon controlled control circuit of the backup power source includes Q1, Q2 silicon-controlled, diode D8, D9,
D10, output sustained diode 11 constitute topological structure H-bridge circuit, photoisolator U4, U5, resistance R15, R16, R17,
The thyristor gating circuit of R18, R19, rectifier diode D6, D7 composition, when the changeover control signal of MCU central processing unit output
The input terminal of photoisolator is connected to through CH1, the output end of photoisolator is connected to thyristor gating circuit and control can
The conducting for controlling silicon Q1 and Q2, if when meeting switch condition after the MCU processor checks backup power source voltage failure
The output control silicon-controlled Q1 and Q2 of signal conduction provides power supply to the electromagnet of change-over switch main body mechanism to realize backup power source
Load supplying conversion；The silicon controlled control circuit and conversion method of common power supply are realized in above-mentioned same method.
Working procedure of the invention is as follows：Each peripheral hardware register of MCU central processing unit is initialized first, is read pre-
Frequency, the normal operating value range of supply voltage for the power supply deposited, this value can also be arranged or be modified by key, then
Carry out the processes such as supply voltage sampling, transformation, filtering, AD transformation, virtual value calculating, breakdown judge and output switching control.Letter
Number process flow is as follows：Common power supply collects Uab、UbcLine voltage signal is depressured through voltage transformer, output to voltage signal
Processing unit, the interference in the signal processing unit through second order active low-pass filter circuit, other than attenuation measurement frequency range
Signal, to the U of required common power supplyab、UbcLine voltage signal is respectively outputted to built in MCU central processing unit after being filtered
Two ADC analog-digital converters input terminal, the ADC analog-digital converter respectively by commonly use power supply PIT timers trigger simultaneously
Start to convert, two-way ADC analog-digital converter triggers respective DMA data transfer control, DMA data after converting respectively again
The transformation result of ADC analog-digital converter is automatically transferred to respectively built-in RAM memory by transfer control, is realized to signal electricity
512 point samplings for pressing each cycle, i.e. to Change-over knot after MCU central processing unit detects DMA data transmission end interrupt request
Fruit carries out square calculating an of data and saves interim calculated result, carries out after detecting half period sampled signal
Judgement to the conversion of power supply decompression meets decompression conversion if the signal is not within the scope of the normal voltage value of supply voltage
Condition, i.e. output control signal conduction photoisolator U4, U5, described photoisolator U4, U5 are then output control signals to can
Silicon-controlled Q1, Q2 is connected in the control electrode for controlling silicon, and the electromagnet on the Double-power controller ontology obtains electric, band manual converting
Structure in a relatively short period of time converts the power load of dual power supply, while the control signal for meeting decompression switch condition is defeated
The control of fire-fighting link is realized to fire protection linkage control unit out, if backup power source is generating set, decompression conversion control
Signal processed is exported to generating set starts power electric generator automatically, i.e. automatic after the voltage of generator output reaches power reguirements
Load transfer to backup power source is powered, if detecting normal voltage value model of the sampled signal in supply voltage of common power supply
After enclosing, then load is controlled by backup power source and automatically switches to common power supply, continue to power to the load by common power supply, by above
Same working procedure can complete load and be transformed into common power supply from backup power source or be transformed into standby electricity from common power supply
Source, which can also be communicated by the DCOM unit with host computer, to realize intelligence
Management.
It should be noted that：Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not
Restriction to embodiment can also be made on the basis of the above description for those of ordinary skill in the art
Other various forms of variations or variation, there is no necessity and possibility to exhaust all the enbodiments, and is thus extended
Obvious changes or variations out are still in the protection scope of this invention.
Claims (5)
1. a kind of double-power intelligent controller, including MCU central processing unit and the AC/DC ac-dc conversion unit being attached thereto,
Voltage signal acquisition and processing unit, the TCU transfer control unit of common power supply and backup power source；
It is characterized in that：The MCU central processing unit selects 32 Cotex-m4 processing of K30DX64VLH7 of freescale
Device；
The voltage signal acquisition and processing unit includes voltage signal acquisition unit and signal processing unit, the voltage
Signal acquisition unit is sampled two groups of line voltage signals of common power supply and backup power source using 4 groups of identical circuits, passes through
Current mode voltage transformer isolated buck is exported to the signal processing unit；
The signal processing unit divides after being filtered to two groups of line voltage signals of required common power supply and backup power source
It is not output to the input terminal of two ADC analog-digital converters built in MCU central processing unit and two built in MCU central processing unit
CMP comparator input terminal, the measurement for voltage and frequency.
2. double-power intelligent controller according to claim 1, it is characterized in that：The signal processing unit output is commonly used
Two groups of line voltage signals of power supply and backup power source are connected respectively to two ADC analog-digital converters built in MCU central processing unit
Input terminal, the ADC analog-digital converter respectively by commonly use power supply and backup power source PIT timers trigger and convert,
Two-way ADC analog-digital converter triggers respective DMA data transfer control, DMA data transmission control respectively again after converting
The transformation result of ADC analog-digital converter is automatically transferred to respectively built-in RAM memory by device, is realized to signal voltage each cycle
512 point samplings, when MCU central processing unit detect DMA data transmission end interrupt request after i.e. to transformation result progress one
Square calculating of secondary data simultaneously saves interim calculated result, carries out losing power supply after detecting half period sampled signal
The judgement of conversion is pressed, to realize in the power supply conversion for electrically completing to load dual power supply within the shortest time, when complete
It calculates at a virtual value is carried out after a voltage sample period accurately to obtain common power supply and backup power source sampling phase voltage
Virtual value obtain the virtual value of common power supply and each phase voltage of backup power source and by a kind of mathematical operation.
3. double-power intelligent controller according to claim 1, it is characterized in that：The signal processing unit output is commonly used
Two groups of line voltage signals of power supply and backup power source are connected respectively to the same of two CMP comparators built in MCU central processing unit
Phase input terminal, the reverse input end of two CMP comparators are connected to the defeated of the DAC digital analog converter built in MCU central processing unit
Outlet, two built-in CMP comparator output terminals are connected to the input channel 0 and input of two built-in FTM timer conters
The input terminal in channel 1, FTM timer conter are counted by the output to CMP comparator, then to signal processing unit into
The frequency signal to obtain the frequency signal of power supply and be output to display unit, while being output to MCU centre by row operation
Reason device often use power supply and backup power source DAC digital analog converter and the timing cycle adjusting condition as PIT sample clock generator.
4. double-power intelligent controller according to claim 1, it is characterized in that：The MCU central processing unit has frequency
Frequency signal to the MCU central processing unit of rate adaptation function, the common power supply exported from signal processing unit often uses power supply
Timing cycle adjusting condition of the ADC0 analog-digital converter as PIT0 sample clock generator, the standby electricity exported from signal processing unit
The ADC1 analog-digital converter of the frequency signal in source to MCU central processing unit backup power source is all as the timing of PIT1 sample clock generator
Phase adjusting condition is realized to 512 points of voltage signal each cycle of sampling of different frequency and the calculating of virtual value, to complete 50Hz
Or the calculating of each phase voltage value under 60Hz supply frequency.
5. double-power intelligent controller according to claim 1, it is characterized in that：The TCU transfer control unit is by common electricity
Two groups of identical silicon controlled control circuit compositions in source and backup power source, the silicon controlled control circuit includes Q1, Q2 controllable
Silicon and the thyristor gating circuit being made of photoisolator, resistance, rectifier diode, the output of MCU central processing unit turn
The input terminal that control is signally attached to the photoisolator is changed, the output end of the photoisolator is connected to control machines
Circuit and the conducting for controlling silicon-controlled Q1 and Q2, when the MCU processor detects the voltage of common power supply or backup power source
I.e. output control signal conduction silicon-controlled Q1 and Q2 when meeting switch condition after failure, to the electromagnet of change-over switch main body mechanism
Power supply is provided to realize the load supplying conversion of common power supply or backup power source.
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| WO2018148676A1 (en) * | 2017-02-13 | 2018-08-16 | Endura Technologies LLC | Realtime critical timing path potential fault event detection and prevention for embedded cores |
| CN110165876B (en) * | 2019-05-15 | 2020-07-10 | 昆山龙腾光电股份有限公司 | Power supply circuit and electronic equipment thereof |
| CN111313530B (en) * | 2020-03-12 | 2022-04-19 | 厦门宏发电气有限公司 | Emergency lighting power distribution device |
| CN113691004A (en) * | 2021-08-04 | 2021-11-23 | 成都亨通光通信有限公司 | Method, device and equipment for controlling power supply system based on interface controller |
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