CN204156814U - Low noise frequency converter part - Google Patents
Low noise frequency converter part Download PDFInfo
- Publication number
- CN204156814U CN204156814U CN201420600185.5U CN201420600185U CN204156814U CN 204156814 U CN204156814 U CN 204156814U CN 201420600185 U CN201420600185 U CN 201420600185U CN 204156814 U CN204156814 U CN 204156814U
- Authority
- CN
- China
- Prior art keywords
- amplifier
- frequency
- frequency converter
- frequency mixer
- low noise
- 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
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses low noise frequency converter part, comprise connect successively passive filter, pre-amplifier, prime frequency mixer, active filter, two-stage amplifier, frequency mixer, final amplifier with exchange anti-electrical equipment, described prime frequency mixer also connects level Four amplifier and radiator simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects radiator and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter, power splitter also connects the local vibration source providing 10MHz signal.The utility model is by above-mentioned principle, and this frequency converter can reduce noise, prevents from vibrating the damage to other mechanical part, and reduces temperature, makes the temperature of device be unlikely to too high, makes this electronic component work more stable.
Description
Technical field
The utility model relates to frequency converter field, is specifically related to low noise frequency converter part.
Background technology
In recent years, along with the fast development of microwave device, in radar and the communications field, receiving system generally have employed low noise amplifier as prime, greatly reduces system noise factor, improves sensitivity.The influence and effect fact of frequency mixer to receiving system is really not so.For single-sideband system, the single-sideband system that particularly intermediate frequency is lower, radial noise can bring very large impact to noise.Therefore wider at low noise amplifier frequency band and in the single-sideband system that intermediate frequency is not high, still need to use frequency mixer, and also comprise low noise frequency converter part in frequency mixer.We know frequency converter export in low-order harmonic component and rotor natural machanical frenquence generation resonance time, then noise increase; Higher harmonic components in frequency converter exports and iron core, casing, bearing bracket stand etc., when resonance occurs in respective natural frequency vicinity, then noise increases.The grating noise that existing frequency converter drive motor produces is comparatively remarkable in low frequency range, and the vibration that noise produces also can cause damage to mechanical part.In addition, during frequency converter work, the magnetic field that high order harmonic component in output waveform causes produces magnetic driven power to many mechanical parts, hormetic frequency is close with the natural frequency of these mechanical parts or resonance will occur when overlapping, vibration also can shine into damage to mechanical part, wherein to vibration effect large mainly compared with the harmonic component of low order.The reliability of existing frequency converter is also by the impact of temperature simultaneously, how to ensure that frequency converter temperature is unlikely to too high, by noise reduction, prevents vibration from seeming particularly important to the damage of mechanical part.
Utility model content
The utility model overcomes the deficiencies in the prior art, provides low noise frequency converter part, and this frequency converter can reduce noise, prevent from vibrating the damage to other mechanical part, and reduce temperature, make the temperature of device be unlikely to too high, make this electronic component work more stable.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: low noise frequency converter part, comprise connect successively passive filter, pre-amplifier, prime frequency mixer, active filter, two-stage amplifier, frequency mixer, final amplifier with exchange anti-electrical equipment, described prime frequency mixer also connects level Four amplifier and radiator simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects radiator and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter, power splitter also connects the local vibration source providing 10MHz signal.
Passive filter being set in the front end of this device, for filtering high order harmonic component, avoiding high order harmonic component on the impact of input signal.By the signal wave after prime frequency mixer after mixing again through the filter action of active filter, active filter automatically produces an and electric current that phase place just in time contrary identical with the amplitude of harmonic current, thus effectively absorbing harmonic current, the harmonic wave avoiding this electronic component to produce has an impact to other parts.At output signal end, also AC reactor is set in addition, to absorb the higher harmonic current composition in output current of frequency converter, thus plays reduction noise, weaken or eliminate vibration, prevent mechanical part impaired because of vibration.Prime frequency mixer and frequency mixer also arrange radiator timely by disperses heat, avoid the critical piece of this electronic component due to temperature too high and cause damage, improve the stability of this electronic component.
This low noise frequency converter part uses prime frequency mixer and these two frequency mixers of frequency mixer to realize down-conversion by secondary mixing.Frequency synthesizer and local vibration source can provide stable signal for down-conversion passage, stabilization signal encourages generation one band frequency signal f1-f2 at frequency synthesizer through power splitter DDS, and the stabilization signal that local vibration source produces produces through power splitter DDS excitation and through the phase locking frequency multiplying of phase locking unit the point frequency secondary local oscillation signal that frequency is L1.The downstream signal frequencies inputted from passive filter is f3-f4, the mixing that this signal realizes outputing signal with mixing synthesizer f1-f2 by prime frequency mixer produces the fixed intermediate frequency signal that frequency is L2, this intermediate-freuqncy signal and two local oscillation frequency signal L1 produce the intermediate-freuqncy signal of standard by the mixing of frequency mixer, then export.This device can provide stable local vibration source for down-conversion passage, makes the control that low noise frequency converter part can well realize supply frequency, reaches stability contorting alternating current machine rotating speed.
Described frequency synthesizer also connects humidity sensor.Humidity condition timely on response frequency synthesizer, then takes moisture preventive measure, and avoiding this device to make moist affects work, thus improves the stability of its work further.
Described passive filter is LC type passive filter.Before low noise frequency converter part, install LC type passive filter additional, filter high order harmonic component, suppress interference source, avoid higher harmonic wave that the leakage current of frequency converter output cable is increased, the situation of motor-output deficiency is occurred, improve the reliability of device.
Described passive filter is also connected with input signal.
AC reactor is also connected with output signal.
Compared with prior art, the beneficial effects of the utility model are:
1, at output signal end, also AC reactor is set, to absorb the higher harmonic current composition in output current of frequency converter, thus plays reduction noise, weaken or eliminate vibration, prevent mechanical part impaired because of vibration.
2, frequency synthesizer also connects humidity sensor, the humidity condition timely on response frequency synthesizer, then takes moisture preventive measure, and avoiding this device to make moist affects work, thus improves the stability of its work further.
3, passive filter is set in the circuit and active filter carries out twice filtering, filters out harmonic signal wherein, avoid the interference of harmonic wave.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
Be further elaborated the utility model below in conjunction with accompanying drawing, embodiment of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, the utility model low noise frequency converter part, comprise connect successively passive filter, pre-amplifier, prime frequency mixer, active filter, two-stage amplifier, frequency mixer, final amplifier with exchange anti-electrical equipment, described prime frequency mixer also connects level Four amplifier and radiator simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects radiator and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter, power splitter also connects the local vibration source providing 10MHz signal.
Passive filter being set in the front end of this device, for filtering high order harmonic component, avoiding high order harmonic component on the impact of input signal.By the signal wave after prime frequency mixer after mixing again through the filter action of active filter, active filter automatically produces an and electric current that phase place just in time contrary identical with the amplitude of harmonic current, thus effectively absorbing harmonic current, the harmonic wave avoiding this electronic component to produce has an impact to other parts.At output signal end, also AC reactor is set in addition, to absorb the higher harmonic current composition in output current of frequency converter, thus plays reduction noise, weaken or eliminate vibration, prevent mechanical part impaired because of vibration.Prime frequency mixer and frequency mixer also arrange radiator timely by disperses heat, avoid the critical piece of this electronic component due to temperature too high and cause damage, improve the stability of this electronic component.
This low noise frequency converter part uses prime frequency mixer and these two frequency mixers of frequency mixer to realize down-conversion by secondary mixing.Frequency synthesizer and local vibration source can provide stable signal for down-conversion passage, stabilization signal encourages generation one band frequency signal f1-f2 at frequency synthesizer through power splitter DDS, and the stabilization signal that local vibration source produces produces through power splitter DDS excitation and through the phase locking frequency multiplying of phase locking unit the point frequency secondary local oscillation signal that frequency is L1.The downstream signal frequencies inputted from passive filter is f3-f4, the mixing that this signal realizes outputing signal with mixing synthesizer f1-f2 by prime frequency mixer produces the fixed intermediate frequency signal that frequency is L2, this intermediate-freuqncy signal and two local oscillation frequency signal L1 produce the intermediate-freuqncy signal of standard by the mixing of frequency mixer, then export.This device can provide stable local vibration source for down-conversion passage, makes the control that low noise frequency converter part can well realize supply frequency, reaches stability contorting alternating current machine rotating speed.Passive filter wherein realizes carrying out Frequency mixing processing to passing to prime frequency mixer after input signal filter and amplification again, by the frequency signal after the mixing of prime frequency mixer in the filtering again through active filter with pass to frequency mixer and carry out secondary mixing, signal transacting better effects if after amplifying.On the critical piece prime frequency mixer and frequency mixer of this device, go back set temperature transducer simultaneously, realize the detection of temperature, once it is too high to find that temperature raises, in time it is lowered the temperature, ensure its normal effective work, improve the reliability of device, extend the useful life of device.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of above-described embodiment is as follows: described frequency synthesizer also connects humidity sensor.Humidity condition timely on response frequency synthesizer, then takes moisture preventive measure, and avoiding this device to make moist affects work, thus improves the stability of its work further.
Described passive filter is LC type passive filter.Before low noise frequency converter part, install LC type passive filter additional, filter high order harmonic component, suppress interference source, avoid higher harmonic wave that the leakage current of frequency converter output cable is increased, the situation of motor-output deficiency is occurred, improve the reliability of device.
Described passive filter is also connected with input signal.
AC reactor is also connected with output signal.
Just this utility model can be realized as mentioned above.
Claims (5)
1. low noise frequency converter part, it is characterized in that: comprise connect successively passive filter, pre-amplifier, prime frequency mixer, active filter, two-stage amplifier, frequency mixer, final amplifier with exchange anti-electrical equipment, described prime frequency mixer also connects level Four amplifier and radiator simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects radiator and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter, power splitter also connects the local vibration source providing 10MHz signal.
2. low noise frequency converter part according to claim 1, is characterized in that: described frequency synthesizer also connects humidity sensor.
3. low noise frequency converter part according to claim 1, is characterized in that: described passive filter is LC type passive filter.
4. low noise frequency converter part according to claim 1, is characterized in that: described passive filter is also connected with input signal.
5. low noise frequency converter part according to claim 1, is characterized in that: described AC reactor is also connected with output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600185.5U CN204156814U (en) | 2014-10-17 | 2014-10-17 | Low noise frequency converter part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600185.5U CN204156814U (en) | 2014-10-17 | 2014-10-17 | Low noise frequency converter part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204156814U true CN204156814U (en) | 2015-02-11 |
Family
ID=52514901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420600185.5U Expired - Fee Related CN204156814U (en) | 2014-10-17 | 2014-10-17 | Low noise frequency converter part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204156814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242828A (en) * | 2014-10-17 | 2014-12-24 | 绵阳雷迪创微电子科技有限公司 | Low noise frequency converter |
-
2014
- 2014-10-17 CN CN201420600185.5U patent/CN204156814U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242828A (en) * | 2014-10-17 | 2014-12-24 | 绵阳雷迪创微电子科技有限公司 | Low noise frequency converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Du et al. | Interturn fault diagnosis strategy for interior permanent-magnet synchronous motor of electric vehicles based on digital signal processor | |
| CN104154853A (en) | Method for measuring wind driven generator air gap through eddy current sensors | |
| Chai et al. | Gear fault diagnosis based on dual parameter optimized resonance-based sparse signal decomposition of motor current | |
| CN105098769A (en) | Parameter setting method of bypass damping filter in power generation system capable of suppressing subsynchronous resonance | |
| CN202693603U (en) | Magnetoresistive rotating-speed sensor for locomotive | |
| CN103605002A (en) | Harmonic impedance measurement apparatus of electric power system | |
| CN204156814U (en) | Low noise frequency converter part | |
| CN204156815U (en) | Low-converter | |
| Chen et al. | Dynamic characteristics of electromechanical coupling of wind turbine drive system under multi‐source excitation | |
| CN104242828A (en) | Low noise frequency converter | |
| Li et al. | Analysis of vibration and noise of IPMSM for electric vehicles under inverter harmonic in a wide-speed range | |
| Latoufis et al. | Acoustic noise of axial flux permanent magnet generators in locally manufactured small wind turbines | |
| Roggo et al. | On-line 2 to 150 kHz grid impedance meter | |
| CN104467682A (en) | Down converter capable of achieving temperature detection | |
| CN204156813U (en) | Can the frequency converter of harmonic inhabitation | |
| CN104320089B (en) | The frequency converter inhibited to harmonic wave | |
| Chen | The study on source of vibration and acoustic noise of permanent magnet machines by inverter | |
| US20210391785A1 (en) | Electromagnetic emission rejection filter in hybrid/electric vehicles | |
| Zhihuan et al. | The influence of vibration and acoustic noise of axial flux permanent magnet machines by inverter | |
| CN203376455U (en) | On-line fault diagnosis device of coal cutter traction motor | |
| CN108107315B (en) | Salient pole permanent magnet synchronous motor stator winding turn-to-turn short circuit anti-interference fault diagnosis method and system | |
| CN204696689U (en) | Active Power Filter-APF | |
| Zhao et al. | The radiated EMI noise modeling and features analysis on the basis of Smart Grid Equipments | |
| CN104767344A (en) | Method for eliminating vibration of PWM powered brushless direct current motor through frequency calculation | |
| CN103883621A (en) | Magnetic bearing control circuit for magnetic suspension energy-storage flywheel and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170105 Address after: 610000 Sichuan City, Chengdu province high tech Zone, Xiaojiahe is the number of street, building 11, building 1, building 2 Patentee after: CHENGDU XIANTONG SCIENCE & TECHNOLOGY CO., LTD. Address before: 621000 Mianyang city of Sichuan Province Science Park Innovation Service Center Patentee before: MIANYANG LEIDICHUANG MICROELECTRONICS CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20181017 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |