CN106124872A - A kind of open phases of three-phase power source, detection of power loss system and braking method - Google Patents
A kind of open phases of three-phase power source, detection of power loss system and braking method Download PDFInfo
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- CN106124872A CN106124872A CN201610799586.1A CN201610799586A CN106124872A CN 106124872 A CN106124872 A CN 106124872A CN 201610799586 A CN201610799586 A CN 201610799586A CN 106124872 A CN106124872 A CN 106124872A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
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- 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
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- G01R31/42—AC power supplies
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Abstract
nullThe invention discloses a kind of open phases of three-phase power source、Detection of power loss system and braking method，System includes three phase mains RST、Rectification circuit、Relay circuit、IPM circuit、Two-way optocoupler processes circuit、Dsp processor、Braking circuit、Charactron、Servomotor，It is applicable to the electric machine control system of servo-driver，After the abnormal conditions such as three-phase alternating-current supply phase shortage or power down are judged，Dsp processor closes pwm signal，And cut off bus power supply by relay circuit，Start and access braking circuit，Braking power resistance will be sealed between the three-phase windings of servomotor，By three-phase windings short circuit，The remanent magnetism electromotive force making stator winding produces electric current in short circuit loop，Thus play the fast braking of motor，Achieve the safeguard protection effect to electrical equipment and personnel，Easily realize，With low cost，In solving existing electrical equipment, motor band-type brake Module Price is high、Volume is big、Control the problems such as wiring complexity，Have a good application prospect.
Description
Technical field
The present invention relates to industrial automation Motor Control Field, be specifically related to a kind of open phases of three-phase power source, detection of power loss system
System and braking method.
Background technology
At present, need the three-phase alternating-current supply of input is carried out phase shortage and detection of power loss in a lot of industrial automation occasions,
After preventing unexpected power-off, the motor run in electrical equipment, owing to inertia can not stop in time, cause the damage of electrical equipment,
The even casualty accident of operator.It addition, motor is when being in abnormal operating state or needing emergency shutdown, mainly use
The band-type brake module of motor is braked, but, the price of band-type brake module is of a relatively high, after using band-type brake module, and the volume of motor
To increase, and the control wiring of motor will be more complicated, be unfavorable for that electrical equipment is to miniaturization.
Summary of the invention
The open phases of three-phase power source of the present invention, detection of power loss system and braking method, it is adaptable to the motor control of servo-driver
System processed, after judging the abnormal conditions such as three-phase alternating-current supply phase shortage or power down, dsp processor closes pwm signal,
And cut off bus power supply by relay circuit, start and access braking circuit, seal in system by between the three-phase windings of servomotor
Kinetic power resistance, by three-phase windings short circuit, makes the remanent magnetism electromotive force of stator winding produce electric current in short circuit loop, thus plays electricity
The fast braking of machine, it is achieved that the safeguard protection effect to electrical equipment and personnel.Whole system circuit is simple, easily realizes,
With low cost, solve the problems such as motor band-type brake Module Price is high, volume is big, control wiring is complicated in existing electrical equipment；Special
It is not applicable to the motor of below 2KW or the little motor phase failure of inertia and power down braking, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of open phases of three-phase power source, detection of power loss system, it is characterised in that: include three phase mains RST, rectification circuit, relay
Circuit, IPM circuit, two-way optocoupler process circuit, dsp processor, braking circuit, charactron, servomotor, described rectification circuit
The input respectively R of external three phase mains, S, T-port, the outfan of described rectification circuit is connected with relay circuit, institute
The control end stating relay circuit is connected with dsp processor, and the outfan of described relay circuit passes through IPM circuit and servo
Motor is connected, and described dsp processor is connected with servomotor also by braking circuit, and R, S, T of described three phase mains leads to
Cross two-way optocoupler to process circuit and obtain two-way square-wave signal RS with ST and be connected with dsp processor, described dsp processor also with
IPM circuit, braking circuit, charactron are respectively connected with.
Aforesaid a kind of open phases of three-phase power source, detection of power loss system, it is characterised in that: described two-way optocoupler processes circuit bag
Including opto-coupler chip U1 and U2, reverser U3, resistance R1～R9, electric capacity C1 and C2, the 1st foot of described opto-coupler chip U1 passes through resistance
R1 is connected with three phase mains R, and the 2nd foot of described opto-coupler chip U1 is connected with three phase mains S-phase by resistance R2, described optocoupler
Parallel resistance R4 between 1st foot and the 2nd foot of chip U1, the 1st foot of described opto-coupler chip U2 and the 2nd foot phase of opto-coupler chip U1
Connecting, the 2nd foot of described opto-coupler chip U2 is connected with three phase mains T-phase by resistance R3, the 1st foot of described opto-coupler chip U2
And the 2nd parallel resistance R5 between foot, the 4th foot of described opto-coupler chip U1 is connected with power supply VCC by resistance R6, described optocoupler
4th foot of chip U1 is connected with reverser U3 by resistance R8, and the 1st foot of described reverser U3 is connected to the ground by electric capacity C1
Connecing, the 4th foot of described opto-coupler chip U2 is connected with power supply VCC by resistance R7, and the 4th foot of described opto-coupler chip U2 is by electricity
Resistance R9 is connected with reverser U3, and the 3rd foot of described reverser U3 is connected to the ground by electric capacity C2 and connects, and described reverser U3's is defeated
Go out end output square-wave signal RS and ST respectively, be connected with the I/O port of dsp processor.
Aforesaid a kind of open phases of three-phase power source, detection of power loss system, it is characterised in that: braking circuit includes opto-coupler chip
U4, braking relay RELAY, sustained diode 1, resistance R10, braking resistor R11 and R12, described opto-coupler chip U4 input
Positive pole be connected with power supply VCC by R10, the negative pole of described opto-coupler chip U4 input is connected with DSP brake signal, institute
The 4th foot stating opto-coupler chip U4 outfan is connected with power vd D, and the 3rd foot of described opto-coupler chip U4 outfan continues with braking
Coil one end of electrical equipment RELAY is connected, and the coil other end of described braking relay RELAY is connected to the ground and connects, described braking
The coil two ends parallel connection sustained diode 1 of relay R ELAY, the anode of described sustained diode 1 and braking relay RELAY
The 1st foot be connected, the negative terminal of described sustained diode 1 is connected with the 8th foot of braking relay RELAY, and described braking continues
Movable contact the 3rd foot of electrical equipment RELAY, the 6th foot are connected with motor U phase winding by the first braking resistor R11, and described braking continues
Stationary contact the 4th foot of electrical equipment RELAY is connected with the V phase winding of motor, the 5th foot of described braking relay RELAY stationary contact
It is connected with the W phase winding of motor by the second braking resistor R12.
Based on above-mentioned a kind of open phases of three-phase power source, the braking method of detection of power loss system, it is characterised in that: include following
Step,
Step (1), detects three-phase alternating current R, S, T, processes circuit by the alternate electricity between biphase by two-way optocoupler
Pressure reduction is converted into direct current signal, and is converted into square-wave signal by reverser, between formation R and S-phase between sampled signal RS, S and T-phase
Sampled signal ST, is separately input to the I/O port of dsp processor；
Step (2), square-wave signal RS, ST of sampling are judged, if sampled signal RS, ST all exist output by dsp processor
And when having phase contrast, then three-phase alternating current is powered normally, and DSP is left intact, and servo-driver normally works；If sampling letter
When all there is output in number RS, ST and signal synchronizes, then S-phase phase shortage, and perform step (3)；If sampled signal RS no signal and adopt
When there is output in sample signal ST, then the R phase phase shortage of three-phase alternating current, and perform step (3)；If sampled signal RS exist output and
During sampled signal ST no signal, then the T-phase phase shortage of three-phase alternating current, and perform step (3)；If sampled signal RS, ST are all without letter
Number time, then the biphase phase shortage of R and T of three-phase alternating current or the whole power down of three-phase, and perform step (3)；
Step (3), dsp processor immediately closes off pwm signal, and release bus relay cuts off bus power supply immediately, accesses braking
Circuit, carries out brake hard, and shows fault message on charactron servomotor；
Step (4), after accessing braking circuit, seals in braking power resistance, by three-phase windings between the three-phase windings of servomotor
Short circuit, makes the stator winding remanent magnetism electromotive force of servomotor produce electric current in short circuit loop, thus plays the braking of servomotor
Effect, it is achieved the fast braking of servomotor and stopping.
The invention has the beneficial effects as follows: the open phases of three-phase power source of the present invention, detection of power loss system and braking method, it is adaptable to
The electric machine control system of servo-driver, after the abnormal conditions such as three-phase alternating-current supply phase shortage or power down are judged, DSP
Processor cuts out pwm signal, and cuts off bus power supply by relay circuit, starts and accesses braking circuit, by servomotor
Seal in braking power resistance between three-phase windings, by three-phase windings short circuit, make the remanent magnetism electromotive force of stator winding in short circuit loop
Produce electric current, thus play the fast braking of motor, it is achieved that the safeguard protection effect to electrical equipment and personnel.Whole system
Circuit is simple, easily realizes, with low cost, solves in existing electrical equipment that motor band-type brake Module Price is high, volume is big, controls
The problems such as wiring is complicated；It is particularly well-suited to the motor of below 2KW or the little motor phase failure of inertia and power down braking, has good
Application prospect.
Accompanying drawing explanation
Fig. 1 is the system block diagram of the open phases of three-phase power source of the present invention, detection of power loss and brakes.
Fig. 2 is the circuit diagram of the two-way optocoupler process circuit of the present invention.
Fig. 3 is the circuit diagram of the braking relay of the present invention.
RS and ST signal timing diagram when Fig. 4 is the S-phase phase shortage of the present invention.
Fig. 5 be the three phase mains of the present invention normal time RS and ST signal timing diagram.
Fig. 6 is the open phases of three-phase power source of the present invention, detection of power loss system and the flow chart of braking.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is further illustrated.
As it is shown in figure 1, the open phases of three-phase power source of the present invention, detection of power loss system, including three phase mains RST, rectification circuit,
Relay circuit, IPM circuit, two-way optocoupler process circuit, dsp processor, braking circuit, charactron, servomotor, described whole
The input of the current circuit R of external three phase mains, S, T-port respectively, provide bus power supply by finishing circuit to motor, described
The outfan of rectification circuit is connected with relay circuit, and the control end of described relay circuit is connected with dsp processor, institute
The outfan stating relay circuit is connected with servomotor by IPM circuit, described dsp processor also by braking circuit with
Servomotor is connected, and R, S, T of described three phase mains processes circuit by two-way optocoupler and obtain two-way square-wave signal RS and ST
Being connected with dsp processor, described dsp processor is also respectively connected with IPM circuit, braking circuit, charactron.
The present invention includes that charactron, described charactron are connected with dsp processor, receives when dsp processor processes
Sampled signal RS and ST, obtain the abnormal conditions such as phase shortage or power down, is used for showing fault message, including display institute phase shortage
Title and power down information.
As in figure 2 it is shown, described two-way optocoupler process circuit include opto-coupler chip U1 and U2, reverser U3, resistance R1～R9,
Electric capacity C1 and C2, the 1st foot of described opto-coupler chip U1 is connected with three phase mains R by resistance R1, described opto-coupler chip U1's
2nd foot is connected with three phase mains S-phase by resistance R2, parallel resistance R4 between the 1st foot and the 2nd foot of described opto-coupler chip U1,
1st foot of described opto-coupler chip U2 is connected with the 2nd foot of opto-coupler chip U1, and the 2nd foot of described opto-coupler chip U2 passes through resistance
R3 is connected with three phase mains T-phase, parallel resistance R5 between the 1st foot and the 2nd foot of described opto-coupler chip U2, described opto-coupler chip
4th foot of U1 is connected with power supply VCC by resistance R6, and the 4th foot of described opto-coupler chip U1 is by resistance R8 and reverser U3
Being connected, the 1st foot of described reverser U3 is connected to the ground by electric capacity C1 and connects, and the 4th foot of described opto-coupler chip U2 passes through resistance
R7 is connected with power supply VCC, and the 4th foot of described opto-coupler chip U2 is connected with reverser U3 by resistance R9, described reverser
3rd foot of U3 is connected to the ground by electric capacity C2 and connects, and the outfan of described reverser U3 exports square-wave signal RS and ST respectively, with
The I/O port of dsp processor is connected, and described opto-coupler chip U1 with U2 is for exchanging optocoupler, it is possible to accepting alternating current power supply input, it is defeated
Enter end and include positive and negative two-way luminous tube；The effect of described opto-coupler chip U1 and U2 is that AC signal is converted into direct current signal, institute
The effect stating reverser U3 is that direct current signal is carried out shaping and filtering, makes dsp processor be easier to make for judging.
As it is shown on figure 3, braking circuit includes opto-coupler chip U4, braking relay RELAY, sustained diode 1, resistance
R10, braking resistor R11 and R12, the positive pole of described opto-coupler chip U4 input is connected with power supply VCC by R10, described light
The negative pole of coupling chip U4 input is connected with DSP brake signal, the 4th foot of described opto-coupler chip U4 outfan and power vd D
Being connected, the 3rd foot of described opto-coupler chip U4 outfan is connected with coil one end of braking relay RELAY, described braking
The coil other end of relay R ELAY is connected to the ground and connects, the coil two ends parallel connection fly-wheel diode of described braking relay RELAY
D1, the anode of described sustained diode 1 is connected with the 1st foot of braking relay RELAY, bearing of described sustained diode 1
End is connected with the 8th foot of braking relay RELAY, and movable contact the 3rd foot of described braking relay RELAY, the 6th foot pass through the
One braking resistor R11 is connected with motor U phase winding, stationary contact the 4th foot of described braking relay RELAY and the V phase of motor
Winding is connected, and the 5th foot of described braking relay RELAY stationary contact is by the W phase winding of the second braking resistor R12 with motor
It is connected.
As Figure 4-Figure 6, based on above-mentioned open phases of three-phase power source, the braking method of detection of power loss system, including following
Step,
Step (1), detects three-phase alternating current R, S, T, processes circuit by the alternate electricity between biphase by two-way optocoupler
Pressure reduction is converted into direct current signal, and is converted into square-wave signal by reverser, between formation R and S-phase between sampled signal RS, S and T-phase
Sampled signal ST, is separately input to the I/O port of dsp processor；
Step (2), square-wave signal RS, ST of sampling are judged, if sampled signal RS, ST all exist output by dsp processor
And when having phase contrast, the sequential chart of RS and ST is as it is shown in figure 5, the phase contrast t1 of RS and ST is 3.5ms, then three-phase alternating current is powered
Normally, DSP is left intact, and servo-driver normally works；If all there is output in sampled signal RS, ST and signal synchronizes
Time, the sequential chart of RS and ST as shown in Figure 4, then S-phase phase shortage, and perform step (3)；If sampled signal RS no signal and letter of sampling
When there is output in number ST, then the R phase phase shortage of three-phase alternating current, and perform step (3)；If there is output and sample in sampled signal RS
During signal ST no signal, then the T-phase phase shortage of three-phase alternating current, and perform step (3)；If during the equal no signal of sampled signal RS, ST,
The then biphase phase shortage of R and T of three-phase alternating current or the whole power down of three-phase, and perform step (3)；
Step (3), dsp processor immediately closes off pwm signal, and release bus relay cuts off bus power supply immediately, accesses braking
Circuit, carries out brake hard, and shows fault message on charactron servomotor；
Step (4), after accessing braking circuit, seals in braking power resistance, by three-phase windings between the three-phase windings of servomotor
Short circuit, makes the stator winding remanent magnetism electromotive force of servomotor produce electric current in short circuit loop, thus plays the braking of servomotor
Effect, it is achieved the fast braking of servomotor and stopping.
In sum, the open phases of three-phase power source of the present invention, detection of power loss system and braking method, it is adaptable to servo-driver
Electric machine control system, after the abnormal conditions such as three-phase alternating-current supply phase shortage or power down are judged, dsp processor close
Pwm signal, and by relay circuit cut off bus power supply, start access braking circuit, by the three-phase windings of servomotor it
Between seal in braking power resistance, by three-phase windings short circuit, make the remanent magnetism electromotive force of stator winding produce electric current in short circuit loop, from
And play the fast braking of motor, it is achieved that the safeguard protection effect to electrical equipment and personnel.Whole system circuit is simple, holds
Easily realization, with low cost, solves motor band-type brake Module Price height, big, the control wiring complexity of volume etc. in existing electrical equipment
Problem；It is particularly well-suited to the motor of below 2KW or the little motor phase failure of inertia and power down braking, has a good application prospect.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described.The technical staff of the industry should
Understanding, the present invention is not restricted to the described embodiments, and the simply explanation present invention's described in above-described embodiment and description is former
Reason, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes and improvements
Both fall within scope of the claimed invention.Claimed scope is by appending claims and equivalent circle thereof
Fixed.
Claims (4)
1. an open phases of three-phase power source, detection of power loss system, it is characterised in that: include three phase mains RST, rectification circuit, relay
Device circuit, IPM circuit, two-way optocoupler process circuit, dsp processor, braking circuit, charactron, servomotor, described rectified current
The input on the road R of external three phase mains, S, T-port respectively, the outfan of described rectification circuit is connected with relay circuit,
The control end of described relay circuit is connected with dsp processor, and the outfan of described relay circuit passes through IPM circuit and watches
Taking motor to be connected, described dsp processor is connected with servomotor also by braking circuit, R, S, T of described three phase mains
Process circuit by two-way optocoupler to obtain two-way square-wave signal RS with ST and be connected with dsp processor, described dsp processor also with
IPM circuit, braking circuit, charactron are respectively connected with.
A kind of open phases of three-phase power source, detection of power loss system the most according to claim 1, it is characterised in that: described two-way light
Coupling processes circuit and includes opto-coupler chip U1 and U2, reverser U3, resistance R1～R9, electric capacity C1 and C2, described opto-coupler chip U1's
1st foot is connected with three phase mains R by resistance R1, and the 2nd foot of described opto-coupler chip U1 is by resistance R2 and three phase mains S-phase
Connect, parallel resistance R4 between the 1st foot and the 2nd foot of described opto-coupler chip U1, the 1st foot of described opto-coupler chip U2 and optocoupler core
2nd foot of sheet U1 is connected, and the 2nd foot of described opto-coupler chip U2 is connected with three phase mains T-phase by resistance R3, described optocoupler
Parallel resistance R5 between 1st foot and the 2nd foot of chip U2, the 4th foot of described opto-coupler chip U1 passes through resistance R6 and power supply VCC phase
Connecting, the 4th foot of described opto-coupler chip U1 is connected with reverser U3 by resistance R8, and the 1st foot of described reverser U3 passes through
Electric capacity C1 is connected to the ground and connects, and the 4th foot of described opto-coupler chip U2 is connected with power supply VCC by resistance R7, described opto-coupler chip
4th foot of U2 is connected with reverser U3 by resistance R9, and the 3rd foot of described reverser U3 is connected to the ground by electric capacity C2 and connects,
The outfan of described reverser U3 exports square-wave signal RS and ST respectively, is connected with the I/O port of dsp processor.
A kind of open phases of three-phase power source, detection of power loss system the most according to claim 1, it is characterised in that: braking circuit bag
Include opto-coupler chip U4, braking relay RELAY, sustained diode 1, resistance R10, braking resistor R11 and R12, described optocoupler core
The positive pole of sheet U4 input is connected with power supply VCC by R10, the negative pole of described opto-coupler chip U4 input and DSP braking letter
Number being connected, the 4th foot of described opto-coupler chip U4 outfan is connected with power vd D, the 3rd of described opto-coupler chip U4 outfan
Foot is connected with coil one end of braking relay RELAY, and the coil other end of described braking relay RELAY is connected to the ground
Connect, the coil two ends parallel connection sustained diode 1 of described braking relay RELAY, the anode of described sustained diode 1 and braking
1st foot of relay R ELAY is connected, and the negative terminal of described sustained diode 1 is connected with the 8th foot of braking relay RELAY
Connecing, movable contact the 3rd foot of described braking relay RELAY, the 6th foot are connected with motor U phase winding by the first braking resistor R11
Connecing, stationary contact the 4th foot of described braking relay RELAY is connected with the V phase winding of motor, described braking relay RELAY
5th foot of stationary contact is connected with the W phase winding of motor by the second braking resistor R12.
4. based on a kind of open phases of three-phase power source described in claim 1, the braking method of detection of power loss system, it is characterised in that:
Comprise the following steps,
Step (1), detects three-phase alternating current R, S, T, processes circuit by the alternate electricity between biphase by two-way optocoupler
Pressure reduction is converted into direct current signal, and is converted into square-wave signal by reverser, between formation R and S-phase between sampled signal RS, S and T-phase
Sampled signal ST, is separately input to the I/O port of dsp processor；
Step (2), square-wave signal RS, ST of sampling are judged, if sampled signal RS, ST all exist output by dsp processor
And when having phase contrast, then three-phase alternating current is powered normally, and DSP is left intact, and servo-driver normally works；If sampling letter
When all there is output in number RS, ST and signal synchronizes, then S-phase phase shortage, and perform step (3)；If sampled signal RS no signal and adopt
When there is output in sample signal ST, then the R phase phase shortage of three-phase alternating current, and perform step (3)；If sampled signal RS exist output and
During sampled signal ST no signal, then the T-phase phase shortage of three-phase alternating current, and perform step (3)；If sampled signal RS, ST are all without letter
Number time, then the biphase phase shortage of R and T of three-phase alternating current or the whole power down of three-phase, and perform step (3)；
Step (3), dsp processor immediately closes off pwm signal, and release bus relay cuts off bus power supply immediately, accesses braking
Circuit, carries out brake hard, and shows fault message on charactron servomotor；
Step (4), after accessing braking circuit, seals in braking power resistance, by three-phase windings between the three-phase windings of servomotor
Short circuit, makes the stator winding remanent magnetism electromotive force of servomotor produce electric current in short circuit loop, thus plays the braking of servomotor
Effect, it is achieved the fast braking of servomotor and stopping.
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| CN201610799586.1A CN106124872B (en) | 2016-08-31 | 2016-08-31 | A kind of open phases of three-phase power source, detection of power loss system and braking method |
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