CN201352725Y - Emergency power source system - Google Patents
Emergency power source system Download PDFInfo
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- CN201352725Y CN201352725Y CNU2009201428995U CN200920142899U CN201352725Y CN 201352725 Y CN201352725 Y CN 201352725Y CN U2009201428995 U CNU2009201428995 U CN U2009201428995U CN 200920142899 U CN200920142899 U CN 200920142899U CN 201352725 Y CN201352725 Y CN 201352725Y
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Abstract
The utility model discloses an emergency power source system which is provided with a master control chip MC68HC908MR16 and a peripheral circuit thereof, an IGBT inversion drive module and a driving power, wherein the master control chip MC68HC908MR16 and the peripheral circuit thereof (PWM) and a control port are directly connected with a double protection hardware circuit; the master control chip MC68HC908MR16 and an RS485 port of the peripheral circuit thereof are connected with a display and telecommunication module, thus effectively avoiding inaccurate measurement and zero-shift caused by the resistance drift of a potentiometer, and protection misjudgment or non-judgment caused by the measurement error; when a catastrophe failure happens, a hardware circuit is adopted for shielding and a software stops the output of the inversion signals, thus not only avoiding the time delay of the operation processing of the master control and fast realizing the protection, but also realizing the protection function when the master control chip can not normally work owing to interference; and an RS485 bus adopting a differential signal is adopted for transmitting data, the anti-interference performance of the data is increased.
Description
Technical field:
The utility model belongs to the electric supply field, a kind of specifically emergency power system (EPS).
Background technology:
Present power, illumination type emergency power system, mainly by storage battery, charger, inversion module, contravariant transformer, inversion driving, battery patrol and examine, element such as monitoring and protection, output switching, sensor, demonstration and telecommunication module, auxiliary switching power supply forms.
In sensor, supervisory circuit, often adopt adjustable potentiometer calibrated analog input signal sample magnitude and inverter output voltage amplitude, main control chip does not carry out the scheme of signal calibration.Though this scheme has reduced the calculation process amount of main control chip.But potentiometer be subjected to easily element quality, service time, with the influence of external environment condition, resistance produces drift, and then causes signal measurement to be forbidden, have drift, protection erroneous judgement or do not declare, and has reduced reliability of products.
When EPS carries out inversion, during catastrophe failures such as the direct current overcurrent occurring, drive overcurrent, driving power is under-voltage, EPS should stop inversion.EPS often adopts main control chip to measure each fault-signal, and when catastrophe failure appearred in judgement, the scheme that stops the output of inversion pwm signal realized above-mentioned protection.This scheme is because of needs and only have main control chip to participate in control, exist stop inversion time-delay long, because of strong jamming causes the then hidden danger of uncontrollable inversion of main control chip irregular working, and then reduced reliability of products.
Because of often needing lattice lcd, intelligent EPS shows, and far away with other module standoff distance, adopt independent control chip to realize liquid crystal display control usually, intermodule adopts serial communication.Often communication often adopts the RS232 bus of not isolating to realize between display chip and the main control chip, and the communication of EPS and remote computer is main communication chip with main control chip promptly often by the main control chip realization.Simultaneously, parameter value exists only in the memory of main control chip, and display module is only for showing; It is module independently that battery is patrolled and examined, or only provides fault-signal to main control chip.Because of in, high-power EPS, display module and main control module are separated by far away, adopt the RS232 communication, communication signal is interfered easily, tuning parameter also might be disturbed when transfer of data and be changed, battery is patrolled and examined and can't be realized more data communication simultaneously, has reduced intellectuality, the reliability standard of product.
Summary of the invention:
The purpose of this utility model is: at the deficiency of above-mentioned prior art, propose improvement project, realize a kind of intelligent emergency power system of high reliability.
The technical solution adopted in the utility model:
A kind of emergency power system; it is characterized in that: have main control chip MC68HC908MR16 and peripheral circuit thereof, IGB inversion driver module DR1, driving power, demonstration and telecommunication module; the PWM interface of main control chip MC68HC908MR16 and peripheral circuit thereof is connected to two protection hardware circuits, and the RS485 interface of main control chip MC68HC908MR16 and peripheral circuit thereof is connected to and shows and the telecommunication module.
Described main control chip and peripheral circuit thereof adopt the MC68HC908MR16 main control chip, and memory X5043, benchmark source of stable pressure TL431, charged air bound from RS485 communication interface MAX3082, analog signal sampling channel SIG.Storage is connected to main control chip I2C bus end with the X5043 that resets, and is used for storage parameter is set, and stable reset signal is provided, and is connected to the main control chip reset terminal; TL431 provides stable 2.5V reference voltage source, is connected to main control chip 18 pin (AD sample reference edge); MAX3082 and main control chip are used to realize the communication of main control chip and display module, are connected to main control chip serial communication end; SIG realizes that converting system's combined-voltage, electric current forceful electric power signal and temperature signal to main control chip collectable light current presses signal, is connected to main control chip AD input.
Described two protection hardware circuit, comprise LM339 four voltage comparator U1B, U1C, U1D, 7400 NAND gate U2A, U2B, U2C, LM285 micropower voltage reference diode Tol, eight road bus transceiver SN74LVC245A, Darlington electric crystal array ULN2003AN; The inverting input of LM339 four voltage comparator U1B is connected to direct current sampling Hall sensor T1 through resistance R d1, and through resistance R d2, capacitor C d1 ground connection; The normal phase input end process resistance R 1 of LM339 four voltage comparator U1D is connected to OC (short circuit or the driving overcurrent) signal output part of driver module, and through capacitor C 1 ground connection, and process resistance R 2 is connected to+the 5V power supply; 3 pin (A earth terminal) and ground connection that the inverting input process resistance R ef of LM339 four voltage comparator U1D, capacitor C ef are connected to LM285 micropower voltage reference diode Tol, the inverting input of LM339 four voltage comparator U1D is connected to 2 pin (K voltage stabilizing end) of LM285 micropower voltage reference diode Tol and the inverting input of LM339 four voltage comparator U1C; The normal phase input end process resistance R 9 of LM339 four voltage comparator U1C is connected to UV (driving power the is under-voltage) signal of driving power, and is connected to+the 5V power supply through resistance R 8, and through capacitor C 3 ground connection; The output of LM339 four voltage comparator U1C is connected to second input of 7400 NAND gate U2C and is connected to+the 5V power supply through resistance R 10, the first input end of 7400 NAND gate U2C is connected to, the output of second input of 7400 NAND gate U2B, 7400 NAND gate U2A is connected to 22 pin of main control chip (DL direct current, the input of inversion over-current signal), and the output of 7400 NAND gate U2C is connected to 24 pin (the FAULT fault gathers the signal input) of main control chip and 19 pin (output control terminal) of eight road bus transceiver SN74LVC245A; The first input end of 7400 NAND gate U2B be connected to output, the LM339 four voltage comparator U1B of LM339 four voltage comparator U1D output, and be connected to+the 5V power supply through resistance R 3; Be divided into three the tunnel, the one tunnel through resistance R 4, LED gL ground connection behind the parallel circuits of the output of 7400 NAND gate U2B through resistance R 5 and triode D1 formation, the two tunnel through capacitor C 2 ground connection, and three the road are connected to second input of 7400 NAND gate U2A; The first input end of 7400 NAND gate U2A is connected to 21 pin (the clear over-current signal output of GL) of main control chip; 31,32,33,34,36,37 pin of main control chip (PWM output) are connected to the input of eight road bus transceiver SN74LVC245A, the output of eight road bus transceiver SN74LVC245A is connected to the input of Darlington electric crystal array ULN2003AN, and the output of Darlington electric crystal array ULN2003AN is connected to inversion driver module pwm signal input.
Described demonstration and telecommunication module comprise the RS485 communication chip MAX3082 that display control chip W77E58, Chinese display LCD liquid crystal YM12864C and push-button array, storage chip X5045, two-way band are isolated.YM12864C and push-button array are used to realize liquid crystal display and button operation, are connected to display control chip P0, P2 port; Storage is connected to display control chip P1 port with the X5045 that resets, and is used for storage parameter is set, and stable reset signal is provided, and is connected to the display control chip reset terminal; Two-way RS485 communication chip MAX3082 is connected to serial ports 1, serial ports 2 ports of display control chip, is used to realize the RS485 communication of isolating with main control chip MC68HC908MR16 and remote computer band.
Design philosophy of the present utility model:
In the intelligent emergency power system of high reliability, at the measurement of analog signals such as input voltage and input current and inverter voltage electric current, when EPS produces debugging, carry out digital calibration, and remove the potentiometer calibration by main control chip.
When catastrophe failures such as the direct current overcurrent occurring, drive overcurrent, driving power is under-voltage; EPS adopts special hardware circuit to gather the directly output of shielding inversion pwm signal of back; the simultaneous faults signal is delivered to main control chip and is handled, and stops inverter signal output, the scheme of this " two protection ".
The RS485 bus communication of isolating is adopted in communication between EPS monitoring module, demonstration and the telecommunication module, the battery polling module also hangs on the RS485 bus and realizes data communication simultaneously, display control chip is main communication chip, and the communication of responsible EPS and remote computer.
The debugging of EPS and checking parameter at twice redundant storage in the memory of main control chip, be stored in simultaneously in the memory of display control chip, when EPS starts, three groups of data in two memories are compared processing, if one group of parameter values difference is arranged, EPS reports to the police, and recommends user's guidance panel button to correct that different group data parameters, moves after the unified three groups of parameters of EPS.
Advantage of the present utility model:
A kind of emergency power system that the utility model provides adopts digital calibration, has avoided effectively because of drift is forbidden, had in the measurement that the potentiometer resistance drift causes, the protection erroneous judgement that causes because of measure error or do not declare phenomenon; When producing catastrophe failure, adopt hardware circuit shielding and software to stop inverter signal output, the scheme of this " two protection ", not only avoided the time delay of main control chip calculation process, realized protection quickly, and when main control chip can't operate as normal because of disturbing, also can realize defencive function; The RS485 bus is because of adopting the differential signal transmission data, and the data interference free performance is enhanced, and can articulate a plurality of communication modules on this bus simultaneously, can realize the communication of battery routing inspection unit like this, and unified management; EPS parameter two memories three redundant storage schemes have not only reduced the change that tune-up data is subjected to interference effect, when EPS produces debugging in batches, can transmit modulated parameter between different EPS by the change display module simultaneously.More than these schemes promoted the reliability and the intelligent degree of emergency power system effectively.
Description of drawings:
Fig. 1 is the software flow pattern of digital calibration and checking parameter redundant storage;
Fig. 2 is two protection hardware circuit principle figure;
Fig. 3 is for showing and telecommunication module principle block diagram.
Fig. 4 is the utility model overall structure block diagram
Embodiment:
Referring to Fig. 1-4:
As shown in Figure 1, for example storage battery DC input voitage V is carried out digital calibration.Feed stable DC220V dc voltage value, when unregulated EPS powered on operation, main control chip can use inaccurate K parameter value, and display module liquid crystal display dc voltage value is assumed to be DC253V.Because by panel button, enter the calibration interface, reduce the K parameter value of direct voltage gradually, be DC220V until dc voltage value.Button selects parameter to preserve, and then display chip, main control chip can be stored in the calibration parameter redundancy in the memory.Other input analog amount calibration is with last identical, and when only inverter output voltage being calibrated, fixedly show value by adjustment K value, and then is adjusted the PWM duty ratio, changes inverter output voltage, and the inverter output voltage measured value is equated with show value.
The utility model EPS realizes " two protection " function by electrical schematic diagram shown in Figure 2.EPS generates direct current sampled signal DC by the Hall element direct current of sampling, and is sent to main control chip and Fig. 1 circuit; The signal that is sent to Fig. 1 circuit simultaneously also has the overcurrent OC signal of driver module, the voltage detection signal UV of driving power, the clear over-current signal GL (low level is effective) that main control chip sends exports over-current signal DL (low level is effective), the FAULT (high level is effective) of main control chip to.The output circuit that also comprises the monitoring module pwm signal in Fig. 1 circuit diagram, 6 road pwm signals of main control chip output are put the inversion driver module through SN74LVC245A, ULN2003 output.
Under the normal condition, DC and OC signal are lower than threshold voltage, and U1LM339 comparable chip open-drain output ends, R3 is pulled to high level, makes that U27400 NAND gate 6 pin are low, and 3 pin are high, same UV signal is by being high level, and the U114 pin is output as height, and the FAULT of U28 pin output is low.When direct current overcurrent or inversion overcurrent, short circuit occurring, DC or OC signal voltage exceed comparison fault value, the low level of U1B or U1D output open-drain, and U2B 4 pin drag down, 6 pin output high level, LEDgL is bright for the overcurrent indicator light, 3 pin output low level DL signals, and keep the DL signal (after eliminating fault, it is low manually putting GL, remove the DL signal, guarantee the fault elimination), U28 pin FAULT fault-signal is put height.FAULT puts height makes SN74LVC245A turn-off inversion output, and main control chip detects DL simultaneously, the FAULT signal is effective, stops inversion output, has realized " two protection " function.Equally, after driving power was under-voltage, the UV conducting dragged down the U19 pin, 14 pin, and FAULT puts height, realizes " two protection " function.Main control chip can be by DL signal difference overcurrent and driving power decompression signal.TO1, Rref are used to realize the accurate a reference source of 2.5V among the figure, and R5, D1, C2 are used to prevent that U2 from producing self-oscillation.
As shown in Figure 3, display module uses W77E58 chip (two serial ports) serial ports 1 realization and monitoring module, battery polling module to realize the RS485 bus communication, and serial ports 2 is realized the RS485 bus communication with remote computer.The communicating circuit of every module all adopts DC/DC and optocoupler to realize electrical isolation, efficiently solves the phenomenon because of the long poor anti jamming capability that causes that goes between, and has strengthened system reliability.
Claims (4)
1, a kind of emergency power system is characterized in that: have main control chip MC68HC908MR16 and peripheral circuit thereof, IGBT inversion driver module, driving power, demonstration and telecommunication module; The PWM interface of main control chip MC68HC908MR16 and peripheral circuit thereof is connected to two protection hardware circuits, and the RS485 interface of main control chip MC68HC908MR16 and peripheral circuit thereof is connected to and shows and the telecommunication module.
2, a kind of emergency power system according to claim 1, it is characterized in that: described main control chip and peripheral circuit thereof, adopt the MC68HC908MR16 main control chip, and memory X5043, benchmark source of stable pressure TL431, charged air bound from RS485 communication interface MAX3082, analog signal sampling channel SIG; Memory X5043 adopts the I2C bus to link to each other with main control chip, is used for storage parameter is set; TL431 provides stable 2.5V reference voltage source, is connected to main control chip 18 pin---the AD reference edge of sampling; MAX3082 and main control chip are used to realize the communication of main control chip and display module, are connected to main control chip serial communication end; SIG realizes that converting system's combined-voltage, electric current forceful electric power signal and temperature signal to main control chip collectable light current presses signal, is connected to main control chip AD input.
3, a kind of emergency power system according to claim 1, it is characterized in that: described two protection hardware circuits, comprise LM339 four voltage comparator U1B, U1C, U1D, 7400 NAND gate U2A, U2B, U2C, LM285 micropower voltage reference diode Tol, eight road bus transceiver SN74LVC245A, Darlington electric crystal array ULN2003AN; The inverting input of LM339 four voltage comparator U1B is connected to Hall element T1 through resistance R d1, and through resistance R d2, capacitor C d1 ground connection; The normal phase input end of LM339 four voltage comparator U1D is connected to the short circuit of driver module or drives overcurrent OC signal output part through resistance R 1, and through capacitor C 1 ground connection, and process resistance R 2 is connected to+the 5V power supply; A earth terminal 3 pin and ground connection that the inverting input process resistance R ef of LM339 four voltage comparator U1D, capacitor C ef are connected to LM285 micropower voltage reference diode Tol, the inverting input of LM339 four voltage comparator U1D is connected to K voltage stabilizing end 2 pin of LM285 micropower voltage reference diode Tol and the inverting input of LM339 four voltage comparator U1C; The normal phase input end process resistance R 9 of LM339 four voltage comparator U1C is connected to the under-voltage UV signal of driving power of driving power, and is connected to+the 5V power supply through resistance R 8, and through capacitor C 3 ground connection; The output of LM339 four voltage comparator U1C is connected to second input of 7400 NAND gate U2C and is connected to+the 5V power supply through resistance R 10, the first input end of 7400 NAND gate U2C is connected to, the output of second input of 7400 NAND gate U2B, 7400 NAND gate U2A is connected to the DL direct current of main control chip, the inversion over-current signal is imported 22 pin, and the FAULT fault that the output of 7400 NAND gate U2C is connected to main control chip gathers output control terminal 19 pin that signal is imported 24 pin and eight road bus transceiver SN74LVC245A; The first input end of 7400 NAND gate U2B be connected to output, the LM339 four voltage comparator U1B of LM339 four voltage comparator U1D output, and be connected to+the 5V power supply through resistance R 3; Be divided into three the tunnel, the one tunnel through resistance R 4, LED gL ground connection behind the parallel circuits of the output of 7400 NAND gate U2B through resistance R 5 and triode D1 formation, the two tunnel through capacitor C 2 ground connection, and three the road are connected to second input of 7400 NAND gate U2A; The first input end of 7400 NAND gate U2A is connected to the clear over-current signal of GL of main control chip and exports 21 pin; PWM output 31,32,33,34,36,37 pin of main control chip are connected to the input of eight road bus transceiver SN74LVC245A, the output of eight road bus transceiver SN74LVC245A is connected to the input of Darlington electric crystal array ULN2003AN, and the output of Darlington electric crystal array ULN2003AN is connected to inversion driver module pwm signal input.
4, a kind of emergency power system according to claim 1, it is characterized in that: described demonstration and telecommunication module, comprise above-mentioned main control chip and peripheral circuit, two protection hardware circuit and display module, wherein display module comprises the RS485 communication chip MAX3082 that display control chip W77E58, Chinese display LCD liquid crystal YM12864C and push-button array, storage chip X5045, two-way band are isolated, YM12864C and push-button array are used to realize liquid crystal display and button operation, are connected to display control chip P0, P2 port; Storage is connected to display control chip P1 port with the X5045 that resets, and is used for storage parameter is set, and stable reset signal is provided, and is connected to the display control chip reset terminal; Two-way RS485 communication chip MAX3082 is connected to serial ports 1, serial ports 2 ports of display control chip, is used to realize the RS485 communication of isolating with main control chip MC68HC908MR16 and remote computer band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201428995U CN201352725Y (en) | 2009-01-23 | 2009-01-23 | Emergency power source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201428995U CN201352725Y (en) | 2009-01-23 | 2009-01-23 | Emergency power source system |
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| CN201352725Y true CN201352725Y (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009201428995U Expired - Fee Related CN201352725Y (en) | 2009-01-23 | 2009-01-23 | Emergency power source system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998505A (en) * | 2011-09-14 | 2013-03-27 | 珠海格力电器股份有限公司 | Battery undervoltage detecting circuit |
| CN106023953A (en) * | 2016-07-21 | 2016-10-12 | 合肥联信电源有限公司 | Emergency power supply display screen circuit |
| CN112993968A (en) * | 2021-04-13 | 2021-06-18 | 北京乐研科技有限公司 | Novel multi-source output redundant power supply system and voltage monitoring method thereof |
-
2009
- 2009-01-23 CN CNU2009201428995U patent/CN201352725Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998505A (en) * | 2011-09-14 | 2013-03-27 | 珠海格力电器股份有限公司 | Battery undervoltage detecting circuit |
| CN102998505B (en) * | 2011-09-14 | 2015-10-07 | 珠海格力电器股份有限公司 | Battery undervoltage detection circuit |
| CN106023953A (en) * | 2016-07-21 | 2016-10-12 | 合肥联信电源有限公司 | Emergency power supply display screen circuit |
| CN112993968A (en) * | 2021-04-13 | 2021-06-18 | 北京乐研科技有限公司 | Novel multi-source output redundant power supply system and voltage monitoring method thereof |
| CN112993968B (en) * | 2021-04-13 | 2021-08-03 | 北京乐研科技有限公司 | Novel multi-source output redundant power supply system and voltage monitoring method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20140123 |