CN110095737A - A kind of circuit and method of AC servo driver control power supply power-fail detection - Google Patents
A kind of circuit and method of AC servo driver control power supply power-fail detection Download PDFInfo
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- CN110095737A CN110095737A CN201810098633.9A CN201810098633A CN110095737A CN 110095737 A CN110095737 A CN 110095737A CN 201810098633 A CN201810098633 A CN 201810098633A CN 110095737 A CN110095737 A CN 110095737A
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000011897 real-time detection Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
It include first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, photoelectrical coupler, the first triode, the second triode, signal output end, single phase poaer supply ,+5V power supply and+3.3V power supply the present invention relates to a kind of circuit of AC servo driver control power supply power-fail detection and method, the circuit；Fault diagnosis after the method is included in hardware detection to power down, after driver control motor is shut down by preset shutdown procedure, fault message saves, alarms and re-power.Compared with prior art, the advantages that present invention has circuit simple and reliable, and scheme is simple, and it is convenient to realize, cost is economic.
Description
Technical field
The present invention relates to single-phase detection of power loss fields, more particularly, to a kind of control power supply power-fail inspection of AC servo driver
The circuit and method of survey.
Background technique
In the servo-driver kinetic control system of three-phase alternating current, existing product is normally powering on meeting pair in operation process
Three kinds of states of three phase mains access carry out hardware detection (phase shortage, power down, normal), and there is presently no for control power supply power-fail
The circuit detected.If controlled, electrical power contacts are bad to cause phase shortage power down, and driver can shut down, and cause client to production
The quality of product produces query, but some situations are not design and quality problems, but practical operation personnel's wiring carelessness institute
It causes, this is for design and maintenance personal and solves the problems, such as to cause very big puzzlement to field maintenance person.
By retrieval, China Patent Publication No. is that CN206321756U discloses a kind of power-fail detection circuit and Switching Power Supply
Circuit is connect with alternating current test side and for the output enable end with the pwm chip in switching power circuit
Detect signal output end；The power-fail detection circuit includes alternating current sampling unit, PNP type triode and first resistor；It is described
Alternating current test side is connect by the alternating current sampling unit with the base stage of the PNP type triode, the PNP type triode
Emitter connect with DC power supply connecting pin, the collector of the PNP type triode is grounded by the first resistor；Institute
The collector for stating PNP type triode is connect with the detection signal output end.During power down, power-fail detection circuit output detection letter
So that pwm chip is stopped output, and then stopped the voltage output of switching power circuit, realizes quick power down protection.It should
Utility model also protects a kind of switching power circuit, by increasing power down on the pwm chip periphery of switching power circuit
Detection circuit realizes quick power down, at low cost.But the utility model is directed to or three phase mains accesses to obtain hardware detection, no
Suitable for being detected to control power supply power-fail.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of AC synchronous samplings
Device controls the circuit and method of power supply power-fail detection.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of circuit of AC servo driver control power supply power-fail detection, including first resistor, second resistance, third electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, photoelectrical coupler, the first triode, the second triode, signal
Output end, single phase poaer supply ,+5V power supply and+3.3V power supply, the end L of one end connection single phase poaer supply of the first resistor are described
Second resistance one end connection single phase poaer supply N-terminal, the other end of the first resistor is separately connected the one of 3rd resistor
The input side anode at end and photoelectrical coupler, the other end of the second resistance are separately connected the other end and light of 3rd resistor
The input side cathode of electric coupler, one end of the outlet side of the photoelectrical coupler pass through the 4th resistance connection+5V power supply, and
The base stage of the second triode is connected by the 5th resistance, the outlet side other end of the photoelectrical coupler is grounded and is separately connected
The emitter of first triode and the second triode ,+5V power supply are separately connected the first triode by the 6th resistance
The collector of base stage and the second triode, the collector connection signal output end of first triode, and pass through the 7th electricity
Hinder connection+3.3V power supply.
Preferably, when the circuit power down, capacitor discharges into the Switching Power Supply off-air time and is designed as being greater than
150ms。
Preferably, the photoelectrical coupler is Low speed photo coupler.
Preferably, the CTR of the photoelectrical coupler is 200%~400%.
Preferably, the first resistor is Chip-R.
Preferably, the second resistance is Chip-R.
Preferably, the 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance are patch electricity
Resistance.
A kind of method of AC servo driver control power supply power-fail detection, this method real-time detection to the electric power down of control
Afterwards, driver automatically selects preset motor stopping program to protect control object safe shutdown, simultaneously according to actual application
Fault message is saved, which includes power down failure and relevant signal, then sound an alarm, after control electricity re-powers,
Driver diagnoses to electric power down failure is controlled according to the fault message and coherent signal of record, analyzes power down reason.
Preferably, the preset motor stopping program includes the pre-programmed curve of position, speed or torque instruction, with
Protection controlled device is in home.
Preferably, after the control electricity re-powers, driver is according to the fault message and relevant information of record, to control
It makes electric power down failure to be diagnosed, including hardware detection down circuit output signal and real-time voltage signal, with analysis and Control electricity
Power down reason.
Compared with prior art, the invention has the following advantages that
1, circuit is simple and reliable, and using common optoelectronic coupler, triode, Chip-R is realized.The circuit structure is abundant
Using the characteristic of photoelectrical coupler and triode, the isolation of strong and weak electricity safety and signal transmission are realized.Since this photoelectrical coupler exists
Working frequency in circuit is very low, about in 100HZ or so, therefore can use Low speed photo coupler, Low speed photo coupler
Have the advantages that price is low, current transfer ratio is big.So design had not only taken into account the reliability of function but also can guarantee that cost economy is low
It is honest and clean.
2, the ingenious capacitor discharge time using after power down, timely saves failure logging.The circuit design can be
10ms or so is immediately detected fault-signal, and due to the presence of bus storage capacitor, the power down time design of Switching Power Supply exists
Ten times of time or more can reliably record fault message, and firmware can keep the scene intact rapidly, and according to actually answering
With preset shutdown procedure is chosen, convenient for solving a problem promptly.
Detailed description of the invention
Fig. 1 is hardware detecting circuit principle topological diagram of the invention.
Fig. 2 is control electricity power-off protection method of the invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is a part of the embodiments of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work all should belong to the model that the present invention protects
It encloses.
As shown in Figure 1, a kind of circuit of AC servo driver control power supply power-fail detection, comprising: first resistor R1, the
Two resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, photoelectrical coupler U1,
The end L of one end connection single phase poaer supply of first triode Q1, the second triode Q2, the first resistor R1, described second
The N-terminal of one end connection single phase poaer supply of resistance R2, the other end of the first resistor R1 are separately connected the one of 3rd resistor R3
1 foot of the input side of end and photoelectrical coupler U1, the other end of the second resistance R2 are separately connected the another of 3rd resistor R3
4 feet of 2 feet of the input side of one end and photoelectrical coupler U1, the outlet side of the photoelectrical coupler U1 pass through the 4th resistance
R4 connection+5V power supply, and pass through the pole b of the 5th resistance R5 the second triode of connection Q2, the output of the photoelectrical coupler U1
3 feet of side are grounded and connect the pole e of the first triode Q1 and the second triode Q2, and+5V the power supply passes through the 6th resistance R6
The pole b of the first triode Q1 and the pole c of the second triode Q2 are connected, the pole c of the first triode Q1 connects CHL, and leads to
Cross the 7th resistance R7 connection+3.3V power supply.
When the described circuit power down, capacitor discharges into the Switching Power Supply off-air time and is designed as being greater than 150ms.Described
Photoelectrical coupler U1 is Low speed photo coupler.The CTR of the photoelectrical coupler U1 is 200%~400%.
The first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th electricity
Hinder R6, the 7th resistance R7 is Chip-R.
The working principle of the invention:
(1) when single-phase electricity correctly accesses, output voltage makes photoelectrical coupler U1 output signal be in alternate conduction shutdown
State, CHL obtain DC pulse waveform, and frequency is determined by power supply power supply frequency, and pulsewidth is determined by the supply voltage inputted.Work as electricity
When pressure instantaneous value divides to obtain the threshold voltage of photoelectrical coupler U1 primary side unlatching by first resistor R1, second resistance R2, make
It obtains photoelectrical coupler U1 to be reliably connected, the Vbe voltage of the second triode Q2 is forced to draw and end, first to low level at this time
The Vbe of triode Q1 is higher than 0.7v (being connected by R6 current limliting) rapid saturation conduction, and the Vce of the first triode Q1 passes through pull-up
4th resistance R4, CHL export low level signal；Conversely, photoelectrical coupler U1 is turned off, and the second triode Q2 saturation conduction, first
Triode Q1 cut-off, CHL, which is forced to draw high, gives MCU real-time monitoring.
(2) when single-phase poor electric contact is perhaps broken by stress or supply voltage is consistently less than threshold voltage, photoelectricity
Coupler U1 stops output.The Vbe of second triode Q2 provides suitable biasing pressure difference and enters saturation conduction, and at this time the 1st
The Vbe bias voltage of pole pipe Q1 is almost nil, and the first triode Q1 is turned off rapidly.CHL is sent to the signal of MCU by pulsating direct current
Signal becomes lasting high level.Since the storage capacitor of single-phase rectifier rear end is sufficiently large, capacitor discharges into switch electricity when power down
The source off-air time can discharge formula design greater than 1s according to capacitor, and a practical pulse cycle time maximum only has
10ms, if the I/O of MCU can be determined that power supply power-fail less than rising edge in two period captures.
(3) when MCU firmware real-time detection is to after controlling electric power down, driver automatically selects preset according to actual application
Motor stopping program saves fault message to protect control object safe shutdown, including power down failure and relevant letter
Number, it then sounds an alarm, after control electricity re-powers, driver is according to the fault message and coherent signal of record, to control electricity
Power down failure is diagnosed, and analyzes power down reason, as shown in Figure 2.
A kind of possible implementation, MCU can trigger interrupt mechanism in reception power down fault message in time, pass through output
I/O controls the on-off of electronic switch or mechanical switch control main power source three-phase electricity, while can output signal to PC control
Music Clip can also be added to alarm in LED lamp alarm.Judgement control power down is added as an independent functional parameter, leads to
It crosses analog voltage sampling and power down real-time detection can be determined that the electric power down of control belongs to complete power down failure or input undervoltage is different
Normal failure, such as fault message occur that control electricity is under-voltage and control electric power down, and control electricity is under-voltage not to trigger interrupt mechanism simultaneously, this
It is (under-voltage herein to set that sample is powered on again through fault diagnosis read voltage value and power down fault message it is determined that the type that is out of order
Determining threshold value ensures that arbitration functions are reliable higher than detection of power loss fault threshold).Finally, when single phase poaer supply power down failure occurs,
At the first time after cutting circuit, motor operation can be stopped by protection mechanisms such as mechanical hatching gates to protect motor and operation people
Member preserves from.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of circuit of AC servo driver control power supply power-fail detection, which is characterized in that including first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, photoelectrical coupler, the first triode, the two or three
One end of pole pipe, signal output end, single phase poaer supply ,+5V power supply and+3.3V power supply, the first resistor connects single phase poaer supply
The end L, the N-terminal of one end connection single phase poaer supply of the second resistance, the other end of the first resistor is separately connected the
One end of three resistance and the input side anode of photoelectrical coupler, the other end of the second resistance are separately connected 3rd resistor
One end of the input side cathode of the other end and photoelectrical coupler, the outlet side of the photoelectrical coupler is connected by the 4th resistance
+ 5V power supply, and pass through the base stage of the 5th resistance the second triode of connection, the outlet side other end ground connection of the photoelectrical coupler
And it is separately connected the emitter of the first triode and the second triode ,+5V the power supply is separately connected by the 6th resistance
The collector of the base stage of one triode and the second triode, the collector connection signal output end of first triode, and
Pass through the 7th resistance connection+3.3V power supply.
2. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 1, which is characterized in that
When the described circuit power down, capacitor discharges into the Switching Power Supply off-air time and is designed as being greater than 150ms.
3. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 1, which is characterized in that
The photoelectrical coupler is Low speed photo coupler.
4. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 3, which is characterized in that
The CTR of the photoelectrical coupler is 200%~400%.
5. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 1, which is characterized in that
The first resistor is Chip-R.
6. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 1, which is characterized in that
The second resistance is Chip-R.
7. a kind of circuit of AC servo driver control power supply power-fail detection according to claim 1, which is characterized in that
3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance is Chip-R.
8. a kind of method of AC servo driver control power supply power-fail detection, which is characterized in that this method real-time detection to control
After making electric power down, driver automatically selects preset motor stopping program according to actual application to protect control object safe stopping
Machine, while fault message is saved, which includes power down failure and relevant signal, is then sounded an alarm, and control electricity is again
After powering on, driver diagnoses, analysis power down is former according to the fault message and coherent signal of record to electric power down failure is controlled
Cause.
9. a kind of method of AC servo driver control power supply power-fail detection according to claim 8, which is characterized in that
The preset motor stopping program includes the pre-programmed curve of position, speed or torque instruction, to protect at controlled device
In home.
10. a kind of method of AC servo driver control power supply power-fail detection according to claim 8, feature exist
In after the control electricity re-powers, driver is according to the fault message and relevant information of record, to controlling electric power down failure
It is diagnosed, including hardware detection down circuit output signal and real-time voltage signal, with analysis and Control electricity power down reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098633.9A CN110095737A (en) | 2018-01-31 | 2018-01-31 | A kind of circuit and method of AC servo driver control power supply power-fail detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098633.9A CN110095737A (en) | 2018-01-31 | 2018-01-31 | A kind of circuit and method of AC servo driver control power supply power-fail detection |
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| CN110095737A true CN110095737A (en) | 2019-08-06 |
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| CN201810098633.9A Pending CN110095737A (en) | 2018-01-31 | 2018-01-31 | A kind of circuit and method of AC servo driver control power supply power-fail detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707862A (en) * | 2020-07-10 | 2020-09-25 | 纽福克斯光电科技（上海）有限公司 | Power failure detection circuit |
| CN112612251A (en) * | 2020-12-08 | 2021-04-06 | 珠海格力智能装备有限公司 | Signal processing method, circuit and device |
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| CN203101494U (en) * | 2013-03-15 | 2013-07-31 | 深圳市银河表计股份有限公司 | AC (alternating current) electric supply power failure detection circuit, equipment and system |
| CN103257272A (en) * | 2013-05-02 | 2013-08-21 | 江苏大学 | Power failure detection circuit and detection method for alternating current (AC) power supply |
| CN103296641A (en) * | 2013-06-04 | 2013-09-11 | 中国电子科技集团公司第四十五研究所 | Power supply power-down protection device of motor driving system |
| CN203688642U (en) * | 2013-11-14 | 2014-07-02 | 青岛世泽电子仪表有限公司 | Power failure detection circuit |
| CN207867006U (en) * | 2018-01-31 | 2018-09-14 | 上海安浦鸣志自动化设备有限公司 | AC servo driver controls the circuit of power supply power-fail detection |
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2018
- 2018-01-31 CN CN201810098633.9A patent/CN110095737A/en active Pending
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| CN201682267U (en) * | 2010-05-17 | 2010-12-22 | 苏州凯丽达电器有限公司 | Control circuit of dust collector with motor protecting and power off memory functions |
| WO2013013415A1 (en) * | 2011-07-28 | 2013-01-31 | 深圳市良辉科技有限公司 | Ground wire safe voltage control system |
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| CN111707862A (en) * | 2020-07-10 | 2020-09-25 | 纽福克斯光电科技（上海）有限公司 | Power failure detection circuit |
| CN112612251A (en) * | 2020-12-08 | 2021-04-06 | 珠海格力智能装备有限公司 | Signal processing method, circuit and device |
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