CN207965107U - A kind of three-phase source detecting device, frequency converter and servo motor - Google Patents
A kind of three-phase source detecting device, frequency converter and servo motor Download PDFInfo
- Publication number
- CN207965107U CN207965107U CN201820207335.4U CN201820207335U CN207965107U CN 207965107 U CN207965107 U CN 207965107U CN 201820207335 U CN201820207335 U CN 201820207335U CN 207965107 U CN207965107 U CN 207965107U
- Authority
- CN
- China
- Prior art keywords
- phase
- input terminal
- input
- current
- photoelectrical coupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims abstract description 64
- 230000005611 electricity Effects 0.000 claims description 7
- 230000005669 field effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 239000011717 all-trans-retinol Substances 0.000 description 48
- VYGQUTWHTHXGQB-FFHKNEKCSA-N Retinol Palmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C VYGQUTWHTHXGQB-FFHKNEKCSA-N 0.000 description 12
- 230000002045 lasting effect Effects 0.000 description 12
- 235000019172 retinyl palmitate Nutrition 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The utility model is related to a kind of detection technique of three-phase alternating-current supply, a kind of detection device of three-phase alternating-current supply, frequency converter and servo motor are disclosed, to ensure accurately to detect the loss phase and short trouble of three phase mains.The detection device of three-phase alternating-current supply includes：First input end, the second input terminal, third input terminal, the 4th input terminal and the 5th input terminal, electrode input end and negative input, first photoelectrical coupler, the second photoelectrical coupler, controllable switch and two diodes, and first detection signal output end and second detects signal output end, it can accurately detect the loss phase failure and loss phase and short trouble of three-phase alternating current.
Description
Technical field
The utility model is related to a kind of detection technique of three-phase alternating-current supply, more particularly to a kind of and frequency converter, servo electricity
The related three phase mains detection technique of machine.
Background technology
Three phase alternating current motor powers to it by three-phase alternating-current supply when running, and the phase sequence of three-phase alternating-current supply determines
The steering of motor, and frequency converter (Variable-frequency Drive, VFD) is exported as common three-phase alternating-current supply
Equipment, extensive Motor Control Field can be very good the rotating property of control motor.No matter in electric motor starting or the mistake of operation
Cheng Zhong, the output loss phase of frequency converter can make that motor can not rotate or power performance declines, and more seriously cause motor short
Motor is burnt in road because electric current is excessive, motor feels hot is excessive.Therefore it in electric motor starting and during operation, needs pair
Whether loss phase is detected the out-put supply of frequency converter, so as to take corresponding safeguard measure to motor in loss phase.
Frequency converter is as a kind of electric power conversion apparatus handed over and directly handed over, under some complicated working environments, it is also possible to go out
The case where existing three-phase input power supply loss phase, if such case may damage frequency converter without protection, and then damages
To motor.In addition, it is direct current that the commutating circuit in frequency converter, which is responsible for the three-phase alternating current electric rectification that will be inputted, if three-phase alternating current
Short circuit occurs for the output of any phase and commutating circuit in electricity, will also result in frequency converter job failure.Any failure of frequency converter
It cannot effectively control, be likely to damage motor.
Speed, position, torque can be controlled when servo motor use, and precision is high, it can be according to servo-driver
Instruction is moved with corresponding torque, speed and position, and servo motor is frequently as control machinery member in some servo-drive systems
The motor of part operating, the application of especially AC servo motor are particularly extensive.Servo-driver (Servo Drives) is also known as
Servo controller or servo amplifier are the control devices of servo motor.For AC servo motor, servo-driver
Major loop and frequency converter are essentially identical, need through rectified three-phase circuit to be direct current to the three-phase alternating current electric rectification of input, then
AC servo motor is driven by inverter frequency conversion, so there is also aforementioned problems for servo controller.
To sum up, how loss phase or short trouble are carried out to the three-phase alternating current input power of frequency converter and servo motor
Detection, is a problem needed to be considered.Similarly, loss phase detection is carried out to the out-put supply of frequency converter or servo controller,
Also it is very important.
Utility model content
The utility model provides a kind of detection device of three-phase alternating-current supply, frequency converter and servo motor, to ensure standard
The true loss phase for detecting three phase mains and loss phase and the failure of short circuit.
To achieve the above object, the detection device of three phase mains provided by the utility model, including：
First input end, the second input terminal, third input terminal, the 4th input terminal and the 5th input terminal, electrode input end and
Negative input, the first photoelectrical coupler, the second photoelectrical coupler, controllable switch and two diodes, the first to the 6th current limliting
Resistance and first detection signal output end and the second detection signal output end, wherein：
It is connected with first current-limiting resistance between the first input end and the first phase input terminal of the three phase mains,
It is connected with second current-limiting resistance, the third between second input terminal and the second phase input terminal of the three phase mains
Be connected with the third current-limiting resistance between input terminal and the third phase input terminal of the three phase mains, the 4th input terminal and
5th input terminal is separately connected the phase in the arbitrary two-phase of the three phase mains；
The electrode input end connection carries out the three phase mains cathode output end of the commutating circuit of rectification, described negative
Pole input terminal connects the cathode output end of the commutating circuit, and the negative input：Pass through the 4th current-limiting resistance
It connects the first input end, connect second input terminal by the 5th current-limiting resistance, by the 6th current limliting electricity
Resistance connects the third input terminal；
The anode of the first luminous tube among first photoelectrical coupler connects the first input end, described controllably to open
Connection is connected between the cathode of first luminous tube and the third input terminal, described in the control terminal connection of the controllable switch
Second input terminal；
The anode of the second luminous tube among second photoelectrical coupler connects the electrode input end, second hair
The cathode of light pipe is separately connected the cathode of described two diodes and the negative input, the anode of described two diodes
It is separately connected the 4th input terminal and the 5th input terminal；
The first detection signal output end connects the output end of first photoelectrical coupler, the second detection signal
Output end connects the output end of second photoelectrical coupler.
Further, it is connected with the 7th current-limiting resistance between the first input end and the anode of first luminous tube；Institute
State the control terminal that the second input terminal connects the controllable switch with the third input terminal by divider resistance respectively.
The utility model also provides a kind of frequency converter or servo motor of the detection device including above-mentioned three phase mains, can
To utilize the three-phase alternating current of the three-phase alternating current of the detection device of above-mentioned three phase mains detection input and the output of frequency conversion circuit
Electricity.
Using above-mentioned three-phase alternating-current supply detection device, the loss phase failure of three-phase alternating current can be accurately detected, and
Loss phase and short trouble.
Description of the drawings
Fig. 1 provides the detection device electrical block diagram of three phase mains for the utility model embodiment；
When Fig. 2 a are the detection device work for the three phase mains that the utility model embodiment provides, the detection under normal condition
Signal simulation oscillogram；
When Fig. 2 b, Fig. 2 c and Fig. 2 d are respectively the detection device work for the three phase mains that the utility model embodiment provides,
Detection signal simulation oscillogram when loss phase failure occurs for a wherein phase；
When Fig. 2 e are the detection device work for the three phase mains that the utility model embodiment provides, loss phase all occurs for three-phase
Detection signal simulation oscillogram when failure；
When Fig. 2 f, Fig. 2 g and Fig. 2 h are respectively the detection device work for the three phase mains that the utility model embodiment provides,
A wherein phase occur loss phase and and commutating circuit cathode output end short circuit when detection signal simulation oscillogram.
Specific implementation mode
As shown in Figure 1, being a kind of detection device of three phase mains provided by the utility model, the detection of the three phase mains fills
It sets and uses two photoelectrical coupler (PC1,PC2) three-phase alternating-current supply state is detected, wherein PC1Mainly to three-phase alternating current
Whether there is loss phase to be detected in power supply, and detects whether a wherein phase with the output of commutating circuit occurs short circuit, PC simultaneously2It is main
Whether short-circuit with the output generation of commutating circuit it is responsible for other two-phases.The three-phase that the detection device can also detect frequency converter is defeated
Going out power supply, whether three phase mains provided by the utility model is described in detail below in conjunction with the accompanying drawings in loss phase by taking servo motor as an example
Detection device.
As shown in Figure 1, the detection device of three phase mains provided by the utility model includes five input terminal (L11,L22,
L33), respectively first input end L11, the second input terminal L22With third input terminal L33, the 4th input terminal L44With the 5th input terminal
L55And electrode input end LzWith negative input Lf, wherein first input end L11, the second input terminal L22With third input terminal
L33Each phase input terminal (L of the three-phase alternating-current supply of frequency converter is connected by a current-limiting resistance respectively1,L2,L3), wherein：First
Input terminal L11With the first phase input terminal L of three phase mains1, between be connected with the first current-limiting resistance R1, the second input terminal L22With three
Second phase input terminal L of phase power supply2, between be connected with the second current-limiting resistance R2, third input terminal L33With the third of three phase mains
Phase input terminal L3Between be connected with third current-limiting resistance R2, the 4th input terminal L44With the 5th input terminal L55It is separately connected the three-phase
A phase in the arbitrary two-phase of power supply, such as L shown in FIG. 11And L2Two-phase, electrode input end LzThe anode for connecting commutating circuit is defeated
Outlet DCP, negative input LfConnect the cathode output end N of commutating circuit, and negative input Lf：Pass through the 4th current limliting electricity
Hinder R4Connect first input end L11, pass through the 5th current-limiting resistance R5Connect the second input terminal L22, pass through the 6th current-limiting resistance R6
Connect third input terminal L33, the detection device of three phase mains includes mainly：First photoelectrical coupler PC1, the second photoelectrical coupler
PC2, controllable switch Q and two diode (D1,D2), photoelectrical coupler PC1Output signal is first detection signal, output end
As first detection signal output terminals A CON1, photoelectrical coupler PC2Output signal be second detection signal, output end conduct
Second detection signal output end ACON2, the first detection information and the second detection signal can be input to a signal waveform detection
In device (not shown), by signal waveform detection device detection signal waveform and provide whether the indication signal of failure.
The following detailed description of the specific connection type of the detection device of three phase mains shown in Fig. 1, photoelectrical coupler PC1Among
Luminous tube anode connection first input end L11, controllable switch Q is connected to PC1Luminous tube cathode and third input terminal L33
Between, the control terminal of controllable switch Q connects the second input terminal L22；Second photoelectrical coupler PC2Among luminous tube anode make
For electrode input end Lz, it is connect with the cathode output end DCP of commutating circuit, PC2The cathode of luminous tube be separately connected two two poles
Manage (D1,D2) cathode, and PC2Luminous tube cathode as negative input LfIt is also connected with N, diode D1Anode make
The L of three phase mains is directly connected to for the 4th input terminal1, diode D2Anode be directly connected to three phase mains as the 5th input terminal
L2；First photoelectrical coupler PC1Output end be the first signal output end ACON1With the second photoelectrical coupler PC2Output end
For second signal output terminals A CON2。
First input end L11And first luminous tube anode between be connected with the 7th current-limiting resistance R11；Second input terminal L22
Partial pressure R is connected between the control terminal of controllable switch Q9, third input terminal L33It can be between the control terminal of controllable switch Q
It is connected with partial pressure R10, third input terminal L33Capacitor C can also be connected between the control terminal of controllable switch Q.
Controllable switch Q can use metal-oxide half field effect transistor (Metal-Oxide- as shown in Figure 1
Semiconductor Field-Effect Transistor, MOSFET) device, in addition it can using triode or absolutely
Edge grid bipolar transistor (Insulated Gate Bipolar Transistor, IGBT).It is controllably opened generally according to selection
The type for closing Q is different, needs to work in several volts of its gate pole (or base stage) application to tens volts of control signal, so needing
Pass through R9And R10Partial pressure come obtain suitable gate pole (or base stage) control signal, to ensure opening and turning off for Q.R11Effect
It is when switching tube is opened, limitation flows through PC1With the size of switching tube Q electric currents.
As shown in Figure 1, first input end L11, the second input terminal L22With third input terminal L33Pass through current-limiting resistance respectively
(R1,R2,R3) connection three phase mains each phase input terminal (L1,L2,L3).Also, first input end L11, the second input terminal L22With
Third input terminal L33Pass through current-limiting resistance (R respectively4,R5,R6) connection negative input.Divider resistance (R1,R2,R3,R4,R5,R6)
Play the role of decompression to the signal of input switch pipe, is selected according to the model of switching tube and pressure-resistant performance.
Second photoelectrical coupler PC2Among luminous tube anode, pass through a current-limiting resistance R12Connect electrode input end
LZ, that is, pass through current-limiting resistance R12It is connected to the cathode output end DCP of commutating circuit, the cathode of the second luminous tube is separately connected two
The cathode of diode (D1, D2), and pass through a current-limiting resistance R13Connect negative input Lf, that is, pass through current-limiting resistance R13Even
It is connected to the cathode output end N of commutating circuit, the anode of two diodes (D1, D2) is separately connected the 4th input terminal L44With described
Five input terminal L55.Current-limiting resistance R12Act as limitation the second photoelectrical coupler PC2Electric current when conducting, current-limiting resistance R13's
It act as electric current when two diode (D1, D2) conductings of limitation.
In general, signal supervisory instrument can utilize two voltmeters to realize, one of voltmeter detects ACON1's
Signal, another voltmeter detect ACON2Signal, according to detection signal waveform, it may be determined that whether there is loss phase failure,
And loss phase adds the failure of short circuit.In servo motor, ACON1And ACON2It can be directly connected to host controller, upper control
Device processed judges whether to break down and be alerted according to two detection signals.
With reference to signal simulation waveform is detected shown in Fig. 2 a~Fig. 2 h, the work that circuit shown in Fig. 1 is described in detail is former
Reason, wherein L1- N voltages indicate L1Voltage between N, L2- N voltages indicate L2Voltage between N, L11-L33Voltage indicates
L11And L33Between voltage, DCP-N voltages indicate DCP and N between voltage：
1, detection signal ACON under normal circumstances1And ACON2Waveform it is as shown in Figure 2 a, all square waves：
As three phase mains L1、L2、L3When normal input, L1、L2、L3Change by sinusoidal rule, L11、L22、 L33Signal follows
L1、L2、L3Changed with sine wave, works as L11、L22Current potential simultaneously above L33When current potential, photoelectrical coupler PC1Luminous tube connects
The controlled tr tube Q connect can be connected, ACON1Output signal is low (L) current potential, otherwise Q cut-offs, ACON1Signal output is not had,
High (H) current potential is presented.Therefore under normal circumstances, ACON1The signal of output is square-wave signal.
Because of L44、L55With L1、L2Changed with sinusoidal rule, works as L44、L55It is loaded into photoelectrical coupler PC by diode2Hair
When the current potential of light pipe cathode is respectively less than DCP terminal potentials, photoelectrical coupler PC2Conducting, ACON2Output signal is L current potentials, otherwise light
Electric coupler PC2Cut-off, ACON2Signal output is not had, and H current potentials, therefore ACON in this case is presented2Output signal is same
Sample is square-wave signal.ACON2Fluctuation is presented, which is because, working as DCP-N voltages close to L in signal between high period1- N (or
L2- N) voltage when, photoelectrical coupler is not turned on, ACON2For high level, and when DCP-N voltages are slightly above L1- N (or L2- N) electricity
When pressure, photoelectrical coupler PC2There are conducting trend, therefore ACON2Slightly decline, but because of L1- N (or L2- N) voltage rises quickly,
ACON2Signal is restored to high level again quickly.
2、L1Detection waveform when phase loss phase is as shown in Figure 2 b, ACON1For lasting H current potentials, ACON2Export square-wave signal：
Work as L1When phase loss phase, corresponding L11There is no signal to be input to photoelectrical coupler PC1Luminous tube anode, PC at this time1No
It can be connected, ACON1No signal exports, and lasting H current potentials are presented.
Because of L55With L2Still changed with sinusoidal rule, when being loaded into photoelectrical coupler PC by diode2Shine tube cathode
Current potential be more than DCP-N voltages when, photoelectrical coupler PC2Cut-off, ACON2Output signal is H current potentials.L2When-N voltages are relatively low,
Photoelectrical coupler PC2Conducting, ACON2Output signal is L current potentials, therefore ACON in this case2The output signal equally side of being
Wave signal.
It is compared with normal condition, each cycle only works as L2Photoelectrical coupler PC when signal is higher2Cut-off, therefore using work
When frequency 50Hz power supplys, occurs a high level per 20ms or so, square width narrows.
3、L2Detection waveform when phase loss phase is as shown in Figure 2 c, ACON1For lasting H current potentials, ACON2Export square-wave signal：
Work as L2When phase loss phase, photoelectrical coupler PC1Control terminal there is no a signal, therefore be in cut-off state, ACON1To hold
Continuous H current potentials.
ACON2Export the principle and L of square-wave signal1It is identical when phase loss phase, it is same to export the relatively narrow square-wave signal of high level.
4、L3Detection waveform when phase loss phase is as shown in Figure 2 d, ACON1For lasting H current potentials, ACON2Export square-wave signal：
Photoelectrical coupler PC1Conducting is in L11Current potential is higher than L33, and L22Current potential is higher than L33Shi Shixian's.And L11,
L22,L33Signal is respectively from L1-N,L2-N,L3Partial pressure between-N, works as L3When loss phase, in circuit shown in Fig. 1, only surplus L1And L2
Respective upper underarm is connected in turn, namely the case where be equal to single-phase input, at this moment photoelectrical coupler PC1The switching tube Q of lower section
Control terminal and upper terminal voltage the case where being not in simultaneously above lower terminal voltage, would not also make photoelectrical coupler PC1Conducting,
So ACON1It is continuously high level.
Because of L1、L2Still changed with sinusoidal rule, so photoelectrical coupler PC can be made2It is alternately present on and off state,
Therefore ACON2Still exportable square wave.Unlike when Fig. 2 a normal conditions, because of L3Loss phase, L1- N voltages and L2- N voltages
The influence of three alternate commutations, therefore photoelectrical coupler PC are lacked2Only in L1And L2End when voltage is higher and exports high level.
Therefore the frequency of square wave is 2 times of power frequency 50Hz namely the period is that 10ms a high level occurs.
5, detection signal waveform when three-phase whole loss phase is as shown in Figure 2 e, is high level signal：
L1、L2、L3When there is no signal, PC1For cut-off state, ACON at this time1Signal output is not had, and lasting H is presented
Current potential, same ACON2For cut-off state, signal output is not had, lasting H current potentials are presented.
6、L1Phase loss phase and with detection signal waveform when DCP short circuits as shown in figure 2f, ACON1Square-wave signal is exported,
ACON2For lasting H current potentials：
L1Loss phase and and when DCP short circuits, L1It is identical with DCP current potentials, therefore L11Current potential is also at high potential, works as L22Current potential is high
In L33When current potential, switching tube is connected and controls PC1Conducting, therefore ACON1Export square wave.
L1Loss phase and and when DCP short circuits, L1It is identical with DCP current potentials, therefore PC2Lower end is clamped at high potential and can not be connected,
ACON2Output signal is lasting high level.
7、L2Phase loss phase and, ACON as shown in Figure 2 g with detection signal waveform when DCP short circuits1Square-wave signal is exported,
ACON2For lasting H current potentials：
L2Loss phase and and when DCP short circuits, L2It is identical with DCP current potentials, therefore L22Current potential is also at high potential, works as L11Current potential is high
In L33When current potential, switching tube is connected and controls PC1Conducting, therefore ACON1Export square wave.
L2Loss phase and and when DCP short circuits, L2It is identical with DCP current potentials, therefore PC2Lower end is clamped at high potential and can not be connected,
ACON2Output signal is lasting high level.
8、L3Phase loss phase and with detection signal waveform when DCP short circuits as shown in fig. 2h, ACON1For lasting H current potentials,
ACON2Export square-wave signal：
L3Loss phase and and when DCP short circuits, L3It is identical with DCP current potentials, therefore L33Current potential is also at high potential, and switching tube can not
Conducting, PC1It can not be connected, therefore ACON1Export lasting high level.
L3Loss phase and and when DCP short circuits, due to L3There is no access photoelectrical coupler PC for signal2, to photoelectrical coupler PC2
Working condition do not influence, therefore with photoelectrical coupler PC2Working condition and L3It is identical when loss phase, ACON2Still exportable side
Wave.
It should be noted that the most common state when above-mentioned 8 kinds of situations are three-phase alternating current work, for seldom occurring
The failure of two-phase loss phase simultaneously, three-phase power detection circuit shown in the utility model equally can accurately detect failure, no matter which
Also have while two-phase loss phase or phase to phase fault and the situation of DCP short circuits, be all equivalent to only there are one line access, at this moment two
A photoelectrical coupler is all in the state that can not be connected, permanent High level output.
It, can be according to ACON according to the emulation of above-mentioned different situations state1And ACON2Detecting signal carry out decision circuitry shape
State, specific judgment mode is as shown in table 1 below, is divided into following 8 kinds of situations according to common working condition：
1. 〇 of table indicates that detecting signal is that square-wave signal , ╳ indicate that detecting signal is high level
According to table 1, using detection circuit provided by the utility model, under three phase mains normal condition, two detections
Signal is square-wave signal, and in the state of three phase mains whole loss phase, two detection signals are high level, as long as there is a phase
Simultaneously and in the state of DCP short circuits, two detection signals show as one of high level for loss phase or a phase loss phase, another
Square-wave signal is exported, therefore, when detecting in signal there are one high level is exported for two, so that it may to determine that three phase mains has occurred
Failure can carry out loss phase alarm, from without by the malfunction error detection of loss phase be normal condition the case where.It needs
Illustrate, if necessary to determine specific fault type, then needs further to check to mains side.
The detection device of three phase mains provided by the utility model, in addition to detection frequency converter input power whether failure,
Whether the three-phase alternating current that frequency converter output can also be detected has loss phase.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (6)
1. a kind of three-phase source detecting device, which is characterized in that including：
First input end, the second input terminal, third input terminal, the 4th input terminal and the 5th input terminal, electrode input end and cathode
Input terminal, the first photoelectrical coupler, the second photoelectrical coupler, controllable switch and two diodes, the first to the 6th current-limiting resistance,
And first detection signal output end and second detects signal output end, wherein：
First current-limiting resistance is connected between the first input end and the first phase input terminal of the three phase mains, it is described
Second current-limiting resistance, the third input are connected between second input terminal and the second phase input terminal of the three phase mains
It is connected with the third current-limiting resistance, the 4th input terminal and the 5th between end and the third phase input terminal of the three phase mains
Input terminal is separately connected the phase in the arbitrary two-phase of the three phase mains；
The electrode input end connection carries out the three phase mains cathode output end of the commutating circuit of rectification, and the cathode is defeated
Enter the cathode output end that end connects the commutating circuit, and the negative input：It is connected by the 4th current-limiting resistance
The first input end connects second input terminal by the 5th current-limiting resistance, is connected by the 6th current-limiting resistance
Connect the third input terminal；
The anode of the first luminous tube among first photoelectrical coupler connects the first input end, and the controllable switch connects
It is connected between the cathode of first luminous tube and the third input terminal, the control terminal connection described second of the controllable switch
Input terminal；
The anode of the second luminous tube among second photoelectrical coupler connects the electrode input end, second luminous tube
Cathode be separately connected the cathode of described two diodes and the negative input, the anode difference of described two diodes
Connect the 4th input terminal and the 5th input terminal；
The first detection signal output end connects the output end of first photoelectrical coupler, the second detection signal output
End connects the output end of second photoelectrical coupler.
2. three-phase source detecting device as described in claim 1, which is characterized in that the first input end and first hair
The 7th current-limiting resistance is connected between the anode of light pipe；Second input terminal and the third input terminal are respectively by dividing electricity
Resistance connects the control terminal of the controllable switch.
3. three-phase source detecting device as claimed in claim 2, which is characterized in that the third input terminal and described controllably open
It is connected with capacitor between the control terminal of pass.
4. three-phase source detecting device as claimed in claim 1,2 or 3, which is characterized in that the controllable switch includes golden oxygen
Half field effect transistor, triode or insulated gate bipolar transistor.
5. a kind of frequency converter, which is characterized in that including any three-phase source detecting device of Claims 1 to 4.
6. a kind of servo motor, which is characterized in that including any three-phase source detecting device of Claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820207335.4U CN207965107U (en) | 2018-02-06 | 2018-02-06 | A kind of three-phase source detecting device, frequency converter and servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820207335.4U CN207965107U (en) | 2018-02-06 | 2018-02-06 | A kind of three-phase source detecting device, frequency converter and servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207965107U true CN207965107U (en) | 2018-10-12 |
Family
ID=63737676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820207335.4U Expired - Fee Related CN207965107U (en) | 2018-02-06 | 2018-02-06 | A kind of three-phase source detecting device, frequency converter and servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207965107U (en) |
-
2018
- 2018-02-06 CN CN201820207335.4U patent/CN207965107U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW513848B (en) | PWM cyclo converter and power failure detecting circuit | |
| CN101682267B (en) | Electric power source control device and heat pump device using the electric power source control device | |
| CN106059354B (en) | multi-level inverter | |
| Estima et al. | A new algorithm for real-time multiple open-circuit fault diagnosis in voltage-fed PWM motor drives by the reference current errors | |
| CN103427474B (en) | The control method of uninterrupted power supply(ups), uninterrupted power supply(ups) | |
| KR20160007845A (en) | BLDC FAN motor drive control system | |
| CN110011531A (en) | Circuit of power factor correction and air conditioner | |
| CN108627684A (en) | Equipment for the output current for detecting inverter | |
| US11005404B2 (en) | Motor driving apparatus | |
| CN108414873A (en) | A kind of three-phase inverter power device open fault detection method | |
| CN105305483B (en) | Grid-connected inverters class power measurement impedance model optimization method under external disturbance signal | |
| Sui et al. | Analysis of current distortion of three-phase voltage source rectifiers and its application in fault diagnosis | |
| CN104578811B (en) | Matrix converter | |
| Ibem et al. | Multiple open switch fault diagnosis of three phase voltage source inverter using ensemble bagged tree machine learning technique | |
| CN106501691A (en) | Portable high-pressure transducer power unit comprehensive detection device | |
| CN207965107U (en) | A kind of three-phase source detecting device, frequency converter and servo motor | |
| CN108462382A (en) | PFC circuit, PFC circuit control method and air conditioner | |
| CN105075084B (en) | Power inverter | |
| CN206114841U (en) | Portable high -voltage inverter power unit comprehensive testing device | |
| CN202475336U (en) | Contactless reversing contactor | |
| CN105510825B (en) | A kind of asynchronous machine leakage inductance measuring method for eliminating non-linear factor | |
| CN104917437B (en) | A kind of control method of asymmetric four-part form SVPWM technologies for three phase electric machine | |
| CN102594226A (en) | Non-contact reversing contactor | |
| CN106655802B (en) | The pulse-amplitude modulation circuit and wiring condition detection method of wiring state can be detected | |
| CN110460252A (en) | Power electronic system Work condition analogue device with input LC filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 |