CN206790358U - A kind of shaking platform excitation power - Google Patents
A kind of shaking platform excitation power Download PDFInfo
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- CN206790358U CN206790358U CN201720731941.1U CN201720731941U CN206790358U CN 206790358 U CN206790358 U CN 206790358U CN 201720731941 U CN201720731941 U CN 201720731941U CN 206790358 U CN206790358 U CN 206790358U
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- shaking platform
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Abstract
It the utility model is related to a kind of shaking platform excitation power, including isolating transformer, rectification circuit, filter circuit, chopper circuit, inverter circuit, drive control device, the isolating transformer input connects three-phase alternating current by disconnecting switch, the isolating transformer output end is connected to rectification circuit, the rectification circuit is connected with filter circuit, the filter circuit is connected with chopper circuit, the chopper circuit is connected with inverter circuit, output current is fed back to drive control device by the chopper circuit and inverter circuit respectively, the drive control device controls the break-make of chopper circuit and inverter circuit device for power switching respectively, the inverter circuit is connected to the both ends of the excitation coil of electromagnet of shaking platform after drawing.The utility model according to the needs of inverter circuit, can input the amplitude of the DC voltage of inverter circuit by chopper regulation, can solve the problems, such as that harmonic content of the high power contravariant circuit in low frequency is too high and and then influences input power well.
Description
Technical field
It the utility model is related to a kind of shaking platform excitation power.
Background technology
At present, vibration mechine vibrotechnique be based on hydraulic control mode, although hydraulic technique is also evolving,
There are still the scabrous problem such as cost height, design structure complexity, working site oil pollution；Comparatively speaking, electromagnetism is utilized
The electromagnetic exciter of ferromagnetic attraction force, its control mode more intelligence and flexible and working site are excellent in the absence of oil pollution etc.
Gesture.
Electromagnetic exciter can be passed through alternating current into excitation coil of electromagnet, that is, use to obtain vibrating effect
Single-phase inverter is powered.
The circuit topology of Single-Phase Inverter Source is generally AC-DC-AC topology, i.e. rectification circuit (will be single by uncontrollable rectifier
Mutually or three phase mains is rectified into direct current), intermediate DC link (mainly lc circuit direct current is subjected to voltage stabilizing) and inverter circuit (general
Constant DC inversion is constant frequency or the alternating current of change).
In order to realize that shaking platform frequency and amplitude are adjustable, must just carry out VFC to inverter circuit, but this have can
Second harmonic caused by single-phase inversion circuit can be made to reach mains side through intermediate DC link from output end, especially in big work(
When rate, low frequency output occasion, control effect can be had a strong impact on.
Utility model content
The purpose of this utility model is to provide a kind of excitation power control circuit, adjustable to electromagnet offer frequency amplitude
Alternating current, employ Buck chopper circuits in the intermediate DC link of traditional single phase inverter, i.e., inverter circuit is defeated
It is change rather than constant to enter DC voltage, and DC voltage is adjusted in real time according to the frequency of output, so may be used
Effectively to reduce the harmonic content of output current, chopper circuit now serves to enter the AC compounent of outlet side with input side
Row isolation effect, can solve well harmonic content of the high power contravariant circuit in low frequency it is too high and and then influence input
The problem of power supply.
To reach above-mentioned requirements, the utility model adopts the technical scheme that：A kind of shaking platform excitation power is provided,
Including isolating transformer, rectification circuit, filter circuit, chopper circuit, inverter circuit, drive control device, isolating transformer input
End connects three-phase alternating current by disconnecting switch, and isolating transformer output end is connected to rectification circuit, rectification circuit and filtered electrical
Road is connected, and filter circuit is connected with chopper circuit, and chopper circuit is connected with inverter circuit, and chopper circuit and inverter circuit respectively will
Output current feeds back to drive control device, and drive control device controls the logical of chopper circuit and inverter circuit device for power switching respectively
Disconnected, inverter circuit is connected to the both ends of the excitation coil of electromagnet of shaking platform after drawing.
Further, rectification circuit be 2 series connection three-phase full-wave uncontrollable rectifier bridges, 2 three-phase full-wave uncontrollable rectifier bridges
Exported respectively to being connected after two output branch roads progress rectification of isolating transformer.
Further, filter circuit includes filter inductance, filter capacitor, pre-charge resistance, and pre-charge resistance is parallel with
It is connected to after by-pass switch between filter inductance and rectification circuit.
Further, chopper circuit includes IGBT upper tubes, IGBT down tubes, and IGBT upper tubes and IGBT down tubes are parallel with electric discharge
The midpoint of switch and discharge resistance, IGBT upper tubes and IGBT down tubes is connected with the electricity of current feedback to drive control device after drawing
Piezoelectricity flow sensor, drive control device control IGBT upper tube break-makes, drive control device connect discharge switch and pass through excess voltage
Discharge resistance discharges.
Yet further, chopper circuit is connected to inverter circuit after inductance L1, electric capacity C1 filtering.
Further, inverter circuit includes two single-phase inversion circuits in parallel, and single-phase inversion circuit includes voltage stabilizing electricity
Hold and in parallel with the electric capacity of voltage regulation 4 IGBT modules, 4 IGBT modules include an a upper bridge IGBT and lower bridge IGBT,
Upper bridge IGBT and lower bridge IGBT bridge arm midpoint are connected to the both ends of the excitation coil of electromagnet of shaking platform, electromagnet after drawing
Voltage-current sensor is connected between magnet exciting coil and single-phase inversion circuit by current feedback to drive control device, drive control
Device controls the break-make of IGBT module.
Compared with prior art, the utility model has advantages below：
A kind of shaking platform excitation power of the present utility model, can be adjusted according to the needs of inverter circuit by copped wave
The amplitude of the DC voltage of section input inverter circuit, the harmonic content of output current is effectively reduced, by the AC compounent of outlet side
The effect isolated with input side so that inverter circuit regulation is more stable；Meanwhile using isolating transformer can effectively by
The higher harmonic component of inverter circuit side is kept apart with mains side, reduces the influence to power network.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
As shown in figure 1, the present embodiment provides a kind of shaking platform excitation power, including isolating transformer TR, rectified current
Road, filter circuit, chopper circuit, inverter circuit, drive control device, isolating transformer TR inputs pass through vacuum interrupter
KM1 connection three-phase alternating current AC380V, isolating transformer output end are connected to rectification circuit, and the voltage after rectification is electric after filtering
Road carries out voltage stabilizing, and filter circuit is connected with chopper circuit, and chopper circuit is connected with inverter circuit.
Isolating transformer TR not only keeps apart three-phase AC380V with excitation power, while is boosted, and boosts to
AC660V。
Rectification circuit be 2 series connection three-phase full-wave uncontrollable rectifier bridges (D1, D2), first group of three-phase full-wave uncontrollable rectifier bridge
D1 carries out rectification to isolating transformer TR the first output branch road, and second group of three-phase full-wave uncontrollable rectifier bridge D2 is to isolating transformer
TR the second output branch road carries out rectification.Three-phase full-wave uncontrollable rectifier bridge includes 6 diodes, and 6 diodes form bridge up and down
Rectification is carried out to three-phase electricity, rectification is used as after the DC voltage series connection of first group and second group three-phase full-wave uncontrollable rectifier bridge output
Circuit output end.
Filter circuit mainly includes filter inductance Lf1 and filter capacitor Cf1, and sets pre-charge resistance Ryc, works as filtered electrical
After the appearance upper voltages of (polar capacitor) Cf1 reach threshold value, by-pass switch KM2 closures are controlled by control circuit, by pre-charge resistance
Ryc is bypassed.
AC660V rectifications are DC1000V by rectification circuit and filter circuit, and as the input of chopper circuit.
It is in parallel that chopper circuit chopper circuit includes IGBT upper tube T1, IGBT down tube T2, IGBT upper tube T1 and IGBT down tubes T2
It is connected with after having the extraction of discharge switch KM3 and discharge resistance Rfd, IGBT upper tube T1 and IGBT down tube T2 midpoint by current feedback
To the voltage-current sensor MA0 of drive control device, drive control device control IGBT upper tube T1 break-makes, drive control device, which is connected, puts
Electric switch KM3 discharges excess voltage by discharge resistance Rfd.
Chopper circuit is connected to inverter circuit after inductance L1 and electric capacity C1 filtering, and chopper circuit dc bus is through voltage electricity
Flow sensor MA0 is connected to inductance L1.
Chopper circuit uses Buck type buck circuits, is exported after DC voltage mainly is carried out into reduction regulation, by
Drive control device provides outer shroud of the chopper circuit output voltage set-point as control according to the frequency requirement of inverter circuit, simultaneously
It is that electric current on inductance L1 is controlled as the inner ring of control using output current, wherein actual output voltage current sensor
The actual inductive current that MA0 detects to obtain calculates output pwm pulse signal, controlled after overdriving respectively as value of feedback
IGBT upper tube T1 break-makes (IGBT down tubes T2 is turned off all the time).In addition, if when the DC bus-bar voltage that breaks down is too high, controller
Also need to control discharge resistance switch KM3 to connect, excess voltage is discharged by discharge resistance Rfd.
Inverter circuit includes two groups of single-phase inversion circuits in parallel, and respectively two excitation coil of electromagnet of excitation platform supply
Electricity.Every group of single-phase inversion circuit includes electric capacity of voltage regulation and in parallel with the electric capacity of voltage regulation 4 IGBT modules, 4 IGBT modules
Including an a upper bridge IGBT and lower bridge IGBT.First group of single-phase inversion circuit include electric capacity of voltage regulation Cd1, IGBT module T11,
IGBT module T12, IGBT module T13, IGBT module T14, two bridge arm midpoints are connected to shaking platform I ends electromagnet after drawing
The both ends F11 and F12 of magnet exciting coil；Second group of single-phase inversion circuit includes electric capacity of voltage regulation Cd2, IGBT module T21, IGBT module
T22, IGBT module T23, IGBT module T24, two bridge arm midpoints are connected to shaking platform II ends electromagnet excitation magnet-wire after drawing
The both ends F21 and F22 of circle.Voltage electricity is connected between one end F11 of inverter circuit and shaking platform I ends excitation coil of electromagnet
Voltage x current biography is connected between one end F21 of flow sensor MA1, inverter circuit and shaking platform II ends excitation coil of electromagnet
Sensor MA2, inverter circuit output current is fed back into drive control device.
Drive control device is by the command value according to two electromagnet exciting current amplitudes and frequency, and two current sensors
The actual current value of MA1 and MA2 detection feedbacks, after being calculated, provides two groups of pwm pulse signals, divides after overdriving respectively
Two groups of inverter circuit IGBT break-make is not controlled, exports the final two-way sinusoidal current with correct amplitude and frequency, finally
Electromagnet (electromagnet 1, electromagnet 2) the suction size at shaking platform both ends (I ends, II ends) and the frequency of positive anti-change are controlled,
Realize the vibration of shaking platform various amplitude different frequency.
Claims (6)
1. a kind of shaking platform excitation power, it is characterised in that including isolating transformer, rectification circuit, filter circuit, copped wave
Circuit, inverter circuit, drive control device, the isolating transformer input connects three-phase alternating current by disconnecting switch, described
Isolating transformer output end is connected to rectification circuit, and the rectification circuit is connected with filter circuit, the filter circuit and copped wave
Circuit is connected, and the chopper circuit is connected with inverter circuit, and the chopper circuit and inverter circuit respectively feed back output current
To drive control device, the drive control device controls the break-make of chopper circuit and inverter circuit device for power switching respectively, described
Inverter circuit is connected to the both ends of the excitation coil of electromagnet of shaking platform after drawing.
2. a kind of shaking platform excitation power according to claim 1, it is characterised in that the rectification circuit is 2 strings
The three-phase full-wave uncontrollable rectifier bridge of connection, 2 three-phase full-wave uncontrollable rectifier bridges enter to two output branch roads of isolating transformer respectively
Connect and export after row rectification.
3. a kind of shaking platform excitation power according to claim 1, it is characterised in that the filter circuit includes filtering
Inductance, filter capacitor, pre-charge resistance, pre-charge resistance be parallel with after by-pass switch be connected to filter inductance and rectification circuit it
Between.
4. a kind of shaking platform excitation power according to claim 1, it is characterised in that the chopper circuit includes IGBT
Upper tube, IGBT down tubes, IGBT upper tubes and IGBT down tubes are parallel with discharge switch and discharge resistance, IGBT upper tubes and IGBT down tubes
Midpoint is connected with after drawing by the voltage-current sensor of current feedback to drive control device, drive control device control IGBT upper tubes
Break-make, drive control device connect discharge switch and excess voltage are discharged by discharge resistance.
5. a kind of shaking platform excitation power according to claim 1, it is characterised in that the chopper circuit is through inductance
Inverter circuit is connected to after L1, electric capacity C1 filtering.
6. a kind of shaking platform excitation power according to claim 1, it is characterised in that the inverter circuit includes two
Single-phase inversion circuit in parallel, single-phase inversion circuit include electric capacity of voltage regulation and in parallel with the electric capacity of voltage regulation 4 IGBT modules, and 4
Individual IGBT module connects after including a upper bridge IGBT and the extraction of a lower bridge IGBT, upper bridge IGBT and lower bridge IGBT bridge arm midpoint
The both ends of the excitation coil of electromagnet of shaking platform are connected to, voltage is connected between excitation coil of electromagnet and single-phase inversion circuit
Current feedback to drive control device, drive control device are controlled the break-make of IGBT module by current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720731941.1U CN206790358U (en) | 2017-06-21 | 2017-06-21 | A kind of shaking platform excitation power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720731941.1U CN206790358U (en) | 2017-06-21 | 2017-06-21 | A kind of shaking platform excitation power |
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| Publication Number | Publication Date |
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| CN206790358U true CN206790358U (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720731941.1U Active CN206790358U (en) | 2017-06-21 | 2017-06-21 | A kind of shaking platform excitation power |
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| CN (1) | CN206790358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749359A (en) * | 2022-06-14 | 2022-07-15 | 深圳市汇顶科技股份有限公司 | Signal generating circuit and ultrasonic fingerprint identification device |
-
2017
- 2017-06-21 CN CN201720731941.1U patent/CN206790358U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749359A (en) * | 2022-06-14 | 2022-07-15 | 深圳市汇顶科技股份有限公司 | Signal generating circuit and ultrasonic fingerprint identification device |
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