CN204156813U - Can the frequency converter of harmonic inhabitation - Google Patents
Can the frequency converter of harmonic inhabitation Download PDFInfo
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- CN204156813U CN204156813U CN201420599753.4U CN201420599753U CN204156813U CN 204156813 U CN204156813 U CN 204156813U CN 201420599753 U CN201420599753 U CN 201420599753U CN 204156813 U CN204156813 U CN 204156813U
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- frequency
- amplifier
- resistance
- frequency converter
- frequency mixer
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Abstract
The utility model discloses can the frequency converter of harmonic inhabitation, comprise the feed(er) reactor, active filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and resistance R1 simultaneously, resistance R1 ground connection, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer is gone back contact resistance R2 and third stage amplifier, resistance R2 ground connection, third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.The utility model is by above-mentioned principle, stable local vibration source can be provided for down-conversion passage, the frequency converter making it possible to harmonic inhabitation well can realize the control to supply frequency, reach stability contorting alternating current machine rotating speed, this device can cut off interference simultaneously, suppress high order harmonic component on the impact of motor, the circuit at frequency converter place can better be worked, realize the control to supply frequency.
Description
Technical field
The utility model relates to frequency converter field, and being specifically related to can the frequency converter of harmonic inhabitation.
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 in frequency mixer can the frequency converter of harmonic inhabitation.What the now used the frequency converter of harmonic inhabitation can cannot provide stable local vibration source for down-conversion passage, and the frequency converter making it possible to harmonic inhabitation well can not change supply frequency, reaches the object of stability contorting alternating current machine rotating speed.Frequency converter plays on-off action in main circuit, in the process of on-off circuit, all will produce harmonic wave.Comparatively low-order harmonic is usually comparatively large on motor load impact, causes torque pulsation; Higher harmonic wave then makes the leakage current of frequency converter output cable increase, and makes motor-output not enough.Humorous wave interference also can cause the misoperation of protective relaying device, and electric meter is measured inaccurate, even cannot normally work, harmonic inhabitation seems particularly important.
Utility model content
The utility model overcomes the deficiencies in the prior art, thering is provided can the frequency converter of harmonic inhabitation, stable local vibration source can be provided for down-conversion passage, the frequency converter making it possible to harmonic inhabitation well can realize the control to supply frequency, reach stability contorting alternating current machine rotating speed, this device can cut off interference simultaneously, suppresses high order harmonic component on the impact of motor, the circuit at frequency converter place can better be worked, realize the control to supply frequency.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: can the frequency converter of harmonic inhabitation, comprise the feed(er) reactor, active filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and resistance R1 simultaneously, resistance R1 ground connection, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer is gone back contact resistance R2 and third stage amplifier, resistance R2 ground connection, third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
Feed(er) reactor is set in the front end of these electric elements, for suppressing mains side overvoltage, suppresses signal transmission source high order harmonic component on the impact of motor to reach, the circuit at frequency converter place can better being worked, realize the better control to supply frequency.Also be provided with source filter at feed(er) reactor rear, active power filtering produces an and electric current that phase place just in time contrary identical with the amplitude of harmonic current automatically, thus effectively can absorb harmonic current.Other electric elements be connected with frequency converter can better be worked, from the impact of high order harmonic component.Main element prime frequency mixer wherein and frequency mixer independent grounding, the ground connection of approach power line of cutting off shared grounding line propagation interference is separated with the ground connection of control line, cuts off the route of transmission of humorous wave interference, reaches the object of further harmonic inhabitation.
This can the frequency converter of harmonic inhabitation use 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, and the frequency converter making it possible to harmonic inhabitation well can realize the control to supply frequency, reaches stability contorting alternating current machine rotating speed.
Described resistance R1 is equal with resistance R2 resistance, is 50 Europe.For by prime frequency mixer and the better ground connection of frequency mixer, avoid the interference of harmonic wave.
Described power splitter also connects the local vibration source that 10MHz signal is provided.The local vibration source of this signal can meet frequency synthesizer power output and the signal of coming from passive filter produce 720MHz intermediate-freuqncy signal by mixing, and the signal making last output is intermediate-freuqncy signal.
Described feed(er) reactor is also connected with input signal.
Described final amplifier is also connected with output signal.
Compared with prior art, the beneficial effects of the utility model are:
1, this device can provide stable local vibration source for down-conversion passage, and the frequency converter making it possible to harmonic inhabitation well can realize the control to supply frequency, reaches stability contorting alternating current machine rotating speed.
2, feed(er) reactor is set in the front end of these electric elements, for suppressing mains side overvoltage, suppresses signal transmission source high order harmonic component on the impact of motor to reach, the circuit at frequency converter place can better being worked, realize the better control to supply frequency; Also be provided with source filter at feed(er) reactor rear, active power filtering produces an and electric current that phase place just in time contrary identical with the amplitude of harmonic current automatically, thus effectively can absorb harmonic current.
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 comprises the feed(er) reactor, active filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and resistance R1 simultaneously, resistance R1 ground connection, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer is gone back contact resistance R2 and third stage amplifier, resistance R2 ground connection, third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
Feed(er) reactor is set in the front end of these electric elements, for suppressing mains side overvoltage, suppresses signal transmission source high order harmonic component on the impact of motor to reach, the circuit at frequency converter place can better being worked, realize the better control to supply frequency.Also be provided with source filter at feed(er) reactor rear, active power filtering produces an and electric current that phase place just in time contrary identical with the amplitude of harmonic current automatically, thus effectively can absorb harmonic current.Other electric elements be connected with frequency converter can better be worked, from the impact of high order harmonic component.Main element prime frequency mixer wherein and frequency mixer independent grounding, the ground connection of approach power line of cutting off shared grounding line propagation interference is separated with the ground connection of control line, cuts off the route of transmission of humorous wave interference, reaches the object of further harmonic inhabitation.
This can the frequency converter of harmonic inhabitation use 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, and the frequency converter making it possible to harmonic inhabitation well can realize the control to 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 of device after filtering with pass to frequency mixer after amplifying and carry out secondary mixing, signal transacting better effects if.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of above-described embodiment is as follows: described resistance R1 is equal with resistance R2 resistance, is 50 Europe.For by prime frequency mixer and the better ground connection of frequency mixer, avoid the interference of harmonic wave.
Described power splitter also connects the local vibration source that 10MHz signal is provided.The local vibration source of this signal can meet frequency synthesizer power output and the signal of coming from passive filter produce 720MHz intermediate-freuqncy signal by mixing, and the signal making last output is intermediate-freuqncy signal.
Described feed(er) reactor is also connected with input signal.
Described final amplifier is also connected with output signal.
Just this utility model can be realized as mentioned above.
Claims (5)
1. can the frequency converter of harmonic inhabitation, it is characterized in that: comprise the feed(er) reactor, active filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and resistance R1 simultaneously, resistance R1 ground connection, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer is gone back contact resistance R2 and third stage amplifier, resistance R2 ground connection, third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
2. according to claim 1 can the frequency converter of harmonic inhabitation, it is characterized in that: described resistance R1 is equal with resistance R2 resistance, is 50 Europe.
3. according to claim 1 can the frequency converter of harmonic inhabitation, it is characterized in that: described power splitter also connects the local vibration source that 10MHz signal is provided.
4. according to claim 1 can the frequency converter of harmonic inhabitation, it is characterized in that: described feed(er) reactor is also connected with input signal.
5. according to claim 1 can the frequency converter of harmonic inhabitation, it is characterized in that: described final amplifier is also connected with output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599753.4U CN204156813U (en) | 2014-10-17 | 2014-10-17 | Can the frequency converter of harmonic inhabitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599753.4U CN204156813U (en) | 2014-10-17 | 2014-10-17 | Can the frequency converter of harmonic inhabitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204156813U true CN204156813U (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420599753.4U Expired - Fee Related CN204156813U (en) | 2014-10-17 | 2014-10-17 | Can the frequency converter of harmonic inhabitation |
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| Country | Link |
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| CN (1) | CN204156813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320089A (en) * | 2014-10-17 | 2015-01-28 | 绵阳雷迪创微电子科技有限公司 | Frequency converter having inhibiting function on harmonic wave |
-
2014
- 2014-10-17 CN CN201420599753.4U patent/CN204156813U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320089A (en) * | 2014-10-17 | 2015-01-28 | 绵阳雷迪创微电子科技有限公司 | Frequency converter having inhibiting function on harmonic wave |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20170103 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. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20181017 |
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| CF01 | Termination of patent right due to non-payment of annual fee |