CN207098930U - DVDT filter apparatus - Google Patents
DVDT filter apparatus Download PDFInfo
- Publication number
- CN207098930U CN207098930U CN201720630947.XU CN201720630947U CN207098930U CN 207098930 U CN207098930 U CN 207098930U CN 201720630947 U CN201720630947 U CN 201720630947U CN 207098930 U CN207098930 U CN 207098930U
- Authority
- CN
- China
- Prior art keywords
- rectifying path
- inductance
- rectifier bridge
- fast recovery
- input
- 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
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Abstract
The utility model discloses a kind of DVDT filter apparatus, including three-phase reactor L, fast recovery rectifier bridge and noninductive electric capacity C；Three-phase reactor L is used to suppress electric current transformation, and three connection ends of three-phase reactor L side are respectively as input U, input V, input W；The reflected voltage that fast recovery rectifier bridge is used to form motor side carries out rectification, fast recovery rectifier bridge by six commutation diode levels into, the break-make direction of six commutation diodes is identical, each two commutation diode forms a rectifying path, respectively the first rectifying path, the second rectifying path, the 3rd rectifying path, three connection ends of the opposite side of the three-phase reactor are respectively connected to the first rectifying path, the second rectifying path, the 3rd rectifying path, and as three output ends of wave filter；Noninductive electric capacity C is connected in parallel on the both ends of fast recovery rectifier bridge.It can suppress voltage change ratio using the utility model, suppress reflected voltage, reduce the disturbance and impact to frequency converter and motor M.
Description
Technical field
A kind of DVDT filter apparatus is the utility model is related to, belongs to power quality controlling field, is mainly used in distribution
The application scenario of transducer drive motor in system, limit voltage change ratio, protection motor safety operation.
Background technology
At present, using in the power system of RHVC power supply, the terminal voltage of load motor is no longer power network supply
Standard sine wave, but by inverter export a series of pwm pulse voltages.The high speed motion characteristic meeting of power electronic devices
Produce common mode and differential mode voltage rate of change in motor terminal, be not added with wave filter up to kV/ μ S, especially when motor and frequency converter it
Between inevitably when using Long line transmission cable, due to distributed inductance existing for long cable and distribution capacity, pulse voltage
Voltage reflection phenomenon will be produced in motor side, and double terminal voltage of motor rate of change, cause motor terminal overvoltage occur, add
Fast winding insulation ageing process, cause motor insulation harm, or even insulation breakdown.Particularly when inverter passes through long cable
During with motor connection, due to the influence of distributed constant in cable, voltage reflection phenomenon can be produced in motor side, so as in motor side
More than 2 times of overvoltage can be produced, causes coil insulation to puncture.
The content of the invention
Technical problem to be solved in the utility model is：A kind of overcome the deficiencies in the prior art, there is provided DVDT wave filters
Device, to suppress voltage change ratio, suppress reflected voltage.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of DVDT filter apparatus, including three
Phase reactor L, fast recovery rectifier bridge and noninductive electric capacity C；
The three-phase reactor L is used to suppress electric current transformation, three connection ends of three-phase reactor L side respectively as
Input U, input V, input W；
The reflected voltage that the fast recovery rectifier bridge is used to form motor side carries out rectification, and the fast recovery rectifier bridge is by six
Commutation diode level into, the break-make direction of six commutation diodes is identical, each two commutation diode form a rectifying path,
Respectively the first rectifying path, the second rectifying path, the 3rd rectifying path, three connections of the opposite side of the three-phase reactor
End is respectively connected to the first rectifying path, the second rectifying path, the 3rd rectifying path, and as three output ends of wave filter；
The noninductive electric capacity C is connected in parallel on the both ends of fast recovery rectifier bridge.
Further, the direct current side bus of the fast recovery rectifier bridge provides two lead-out terminals of P, N, for connecting motor braking
Resistance.
Further, the three-phase reactor includes the first inductance L1, the second inductance L2 and the 3rd inductance L3, the first inductance L1
One end be that input U, the second inductance L2 one end is that input V, the 3rd inductance L3 one end is input W, the first inductance
The L1 other end is connected between two commutation diodes of the first rectifying path, and the second inductance L2 other end is connected to second
Between two commutation diodes of rectifying path, the 3rd inductance L3 other end is connected to two rectifications two of the 3rd rectifying path
Between pole pipe.
Further, fastp-acting fuse F is connected with the lead-out terminal N, after noninductive electric capacity C is in parallel with fast recovery rectifier bridge with
Fastp-acting fuse F connects.
Above-mentioned technical proposal is employed, the utility model has following beneficial effect：
The pwm pulse as caused by frequency converter is connected to tri- inputs of U, V, W of the present utility model, passes through three-phase reactor
After the flat ripples of L, motor M three-phase input end is connected to, meanwhile, motor reflected voltage can be quickly rectified into directly by fast recovery rectifier bridge
Stream, the noninductive electric capacity C then connect using fast recovery rectifier bridge DC side are absorbed, so as to inhibit common mode to become with differential mode voltage
Rate, reduce disturbance and impact to frequency converter and motor M.
Brief description of the drawings
Fig. 1 is structure principle chart of the present utility model.
Embodiment
In order that content of the present utility model is easier to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail to the utility model.
As shown in figure 1, a kind of DVDT filter apparatus, including three-phase reactor L, fast recovery rectifier bridge and noninductive electric capacity C；
The three-phase reactor L is used to suppress electric current transformation, three connection ends of three-phase reactor L side respectively as
Input U, input V, input W；
The reflected voltage that the fast recovery rectifier bridge is used to form motor side carries out rectification, and the fast recovery rectifier bridge is by six
Commutation diode level into, the break-make direction of six commutation diodes is identical, each two commutation diode form a rectifying path,
Respectively the first rectifying path, the second rectifying path, the 3rd rectifying path, three companies of the opposite side of the three-phase reactor L
Connect end and be respectively connected to the first rectifying path, the second rectifying path, the 3rd rectifying path, and as this DVDT filter apparatus
Three output ends, are connected for the three-phase input end with motor；Dotted box portion is fast recovery rectifier bridge in Fig. 1；
The noninductive electric capacity C is connected in parallel on the both ends of fast recovery rectifier bridge.
Preferably, as shown in figure 1, the braking of motor for convenience, the direct current side bus of the fast recovery rectifier bridge provide P, N
Two lead-out terminals, for connecting motor braking resistance.
Specifically, the three-phase reactor includes the first inductance L1, the second inductance L2 and the 3rd inductance L3, the first inductance L1
One end be that input U, the second inductance L2 one end is that input V, the 3rd inductance L3 one end is input W, the first inductance
The L1 other end is connected between two commutation diodes of the first rectifying path, and the second inductance L2 other end is connected to second
Between two commutation diodes of rectifying path, the 3rd inductance L3 other end is connected to two rectifications two of the 3rd rectifying path
Between pole pipe.
Preferably, as shown in figure 1, being connected with fastp-acting fuse F, noninductive electric capacity C and fast recovery rectifier on the lead-out terminal N
Connected after bridge parallel connection with fastp-acting fuse F.
Operation principle of the present utility model is as follows：
The pwm pulse as caused by frequency converter is connected to tri- inputs of U, V, W of DVDT wave filters, passes through three-phase reactor
After the flat ripples of L, motor M three-phase input end is connected to, while three-phase fast recovery rectifier bridge is connected at the three-phase input end of motor, this is quick
Motor reflected voltage can quickly be rectified into direct current by rectifier bridge, the nothing then connect using three-phase fast recovery rectifier bridge DC side
Electrification holds C and absorbed, and so as to inhibit common mode and differential mode voltage rate of change, reduces disturbance and punching to frequency converter and motor M
Hit.
The utility model still can guarantee that the maximum peak voltage specification (bus for meeting motor at away from motor M300 rice
Voltage 150%).Its specified rejection ability particularly should up to every millisecond of 200V voltage change ratio value even in some
In, when cable length reaches 900 meters, this wave filter remains to provide remarkable performance.The DVDT wave filters connect with 3%
Enter impedance, the access impedance does not interfere with Motor torque, and the DVDT wave filters work in passive mode, has the work of four-quadrant
Make characteristic, it can be minimized to reduce electricity by weakening voltage rate of rise and appearing in the crest voltage in motor terminals
The influence of electric cable transmission line.The DVDT wave filters are specially designed at transducer drive motor occasion, and frequency is switched to frequency converter
Motor of the rate in 900Hz to 8KHz scopes realizes protection.
Particular embodiments described above, technical problem, technical scheme and the beneficial effect solved to the utility model are entered
Further description is gone, should be understood that and the foregoing is only specific embodiment of the utility model, and do not have to
In limitation the utility model, all within the spirit and principles of the utility model, any modification, equivalent substitution and improvements done
Deng should be included within the scope of protection of the utility model.
Claims (4)
- A kind of 1. DVDT filter apparatus, it is characterised in that：Including three-phase reactor L, fast recovery rectifier bridge and noninductive electric capacity C；The three-phase reactor L is used to suppress electric current transformation, and three connection ends of three-phase reactor L side are respectively as input Hold U, input V, input W；The reflected voltage that the fast recovery rectifier bridge is used to form motor side carries out rectification, and the fast recovery rectifier bridge is by six rectifications Diode level is into the break-make direction of six commutation diodes is identical, and each two commutation diode forms a rectifying path, respectively For the first rectifying path, the second rectifying path, the 3rd rectifying path, three connection ends of the opposite side of the three-phase reactor L The first rectifying path, the second rectifying path, the 3rd rectifying path are respectively connected to, and as three of this DVDT filter apparatus Output end；The noninductive electric capacity C is connected in parallel on the both ends of fast recovery rectifier bridge.
- 2. DVDT filter apparatus according to claim 1, it is characterised in that：The direct current side bus of the fast recovery rectifier bridge Two lead-out terminals of P, N are provided, for connecting motor braking resistance.
- 3. DVDT filter apparatus according to claim 2, it is characterised in that：The three-phase reactor includes the first inductance L1, the second inductance L2 and the 3rd inductance L3, the first inductance L1 one end are that input U, the second inductance L2 one end are input V, the 3rd inductance L3 one end are input W, and the first inductance L1 other end is connected to two rectifications two of the first rectifying path Between pole pipe, the second inductance L2 other end is connected between two commutation diodes of the second rectifying path, the 3rd inductance L3 The other end be connected between two commutation diodes of the 3rd rectifying path.
- 4. DVDT filter apparatus according to claim 3, it is characterised in that：It is connected with the lead-out terminal N quick Fuse F, noninductive electric capacity C connect with after fast recovery rectifier bridge parallel connection with fastp-acting fuse F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720630947.XU CN207098930U (en) | 2017-06-02 | 2017-06-02 | DVDT filter apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720630947.XU CN207098930U (en) | 2017-06-02 | 2017-06-02 | DVDT filter apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207098930U true CN207098930U (en) | 2018-03-13 |
Family
ID=61551710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720630947.XU Expired - Fee Related CN207098930U (en) | 2017-06-02 | 2017-06-02 | DVDT filter apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207098930U (en) |
-
2017
- 2017-06-02 CN CN201720630947.XU patent/CN207098930U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20210602 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |