CN209105033U - Electromagnetic force exciting device - Google Patents
Electromagnetic force exciting device Download PDFInfo
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- CN209105033U CN209105033U CN201821989238.1U CN201821989238U CN209105033U CN 209105033 U CN209105033 U CN 209105033U CN 201821989238 U CN201821989238 U CN 201821989238U CN 209105033 U CN209105033 U CN 209105033U
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- buck circuit
- circuit
- electromagnetic
- width modulation
- pulse width
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model belongs to dynamics Controlling experimental field, to provide contactless and sufficiently low error middle low frequency sinusoidal exciting force to various one dimension oscillator experimental benches, thus the dynamic behavior and characteristic of effectively observation one dimension oscillator in the case where different external condition and exiting form.The utility model, electromagnetic force exciting device, including high pressure Buck circuit, low pressure Buck circuit, analog signal pulse width modulation circuit and electromagnetic exciting coil, the input terminal of high pressure Buck circuit accesses the 220V alternating current of rectified filtering and power factor compensation, the input terminal of low pressure Buck circuit is connected with the output end of high pressure Buck circuit, the input terminal of pulse width modulation circuit is connected with the output end of low pressure Buck circuit, and the output end of pulse width modulation circuit is connected with electromagnetic exciting coil.The utility model is mainly used in dynamics Controlling, oscillator experimental occasions.
Description
Technical field
The utility model belongs to dynamics in control experimental field, is related to a kind of electromagnetic force exciting device, is particularly suitable for
Under noncontact condition, the influence of different external conditions and exiting form to spring-mass dynamical system dynamic behavior.
Background technique
It is general to use in order to study the dynamic behavior and characteristic of one-dimensional nonlinear system in Engineering Vibration testing field
Computer modeling technique is studied, and it is sufficient that reason is that existing Engineering Vibration experimental facilities is difficult to provide contactless and error
Enough low middle low frequency sinusoidal exciting forces, therefore experimental result is not enough to provide sufficiently accurate test result.Vibration excitor is used in experiment
Only being provided with sinusoidal exciting force just can guarantee the accuracy of experimental result.
Summary of the invention
In order to overcome the deficiencies of the prior art, the utility model is directed to a kind of vibration testing device of electromagnetic force exciting,
To provide contactless and sufficiently low error middle low frequency sinusoidal exciting force for various one dimension oscillator experimental benches, to effectively observe
The dynamic behavior and characteristic of one dimension oscillator in the case where different external condition and exiting form.For this purpose, the utility model
It adopts the technical scheme that, electromagnetic force exciting device, including high pressure Buck circuit, low pressure Buck circuit, analog signal pulse are wide
Modulation circuit and electromagnetic exciting coil are spent, the input terminal of high pressure Buck circuit accesses rectified filtering and power factor compensation
The input terminal of 220V alternating current, low pressure Buck circuit is connected with the output end of high pressure Buck circuit, pulse width modulation circuit
Input terminal is connected with the output end of low pressure Buck circuit, and the output end of pulse width modulation circuit is connected with electromagnetic exciting coil；
Pulse width modulation circuit finally modulates the pulse square wave shape for determining frequency according to the original analog of input and triangular wave carrier
The electric power of formula, which exports, gives electromagnetic exciting coil, while being provided with semiconductor devices and synchronizing rectification to electromagnetic exciting coil or continue
Stream, electromagnetic exciting coil just changes and changing magnetic field in axially generation intensity with analog signal, to produce to ferromagnetism oscillator
Raw exciting magnetic force.
The output of two Buck circuits is respectively controlled by voltage hysteresis controller and gate drivers.
The voltage hysteresis controller of Buck circuit is controlled by output feedback voltage sample circuit, error amplifier and sluggish ratio
It is constituted compared with device, the output feedback voltage V of Buck circuitFBAfter the sampling of two electric resistance partial pressures, error originated from input amplifier, error amplifier
Hysteresis comparator is sent into after sampling voltage is amplified, hysteresis comparator by error signal believe afterwards compared with reference voltage by output control
Number, under the control of voltage hysteresis controller, the output feedback voltage virtual value of Buck circuit
Pulse width modulation module finally modulates the arteries and veins for determining frequency according to the original analog of input and triangular wave carrier
The electric power for rushing square, which exports, gives electromagnetic exciting coil, while it is whole to use semiconductor devices to synchronize electromagnetic exciting coil
Stream or afterflow.
In Pulse width modulation module, two inputs of original analog and triangular wave carrier difference input comparator
End synchronizes rectification or afterflow to electromagnetic exciting coil using semiconductor devices in the output end of comparator, specifically uses
The Xiao Jite diode and metal-oxide-semiconductor of concatenation are realized.
The characteristics of the utility model and beneficial effect are:
The utility model using equipment can in terms of supply voltage and analog signal two adjustment parameter, be conveniently adjusted reality
Condition is tested, and obtains corresponding experimental data.
The utility model can provide biggish output electric current, and output voltage precision is higher, while possess faster dynamic
State response.
For the utility model in addition to Parameter adjustable section, manufacturing cost is cheap, and it is low to realize that condition requires.
The utility model provides the contactless sine excitation power of low error, other forms needed for also can provide user
Exciting force, and equally keep low error.
Furthermore extensive using mounting location, while being also equipped with the features such as small-sized, light, stability is high.
Specific embodiment of the present utility model is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention:
Fig. 1 is the integrated circuit schematic diagram of the utility model；
Fig. 2 is the voltage hysteresis controller principle figure of the utility model；
Fig. 3 is the pulse-width modulator schematic diagram of the utility model.
Specific embodiment
Problem to be solved in the utility model is, provides a kind of vibration testing device of electromagnetic force exciting, to be each
Kind one dimension oscillator experimental bench provides contactless and sufficiently low error middle low frequency sinusoidal exciting force, so that effectively observation is in difference
External condition and exiting form in the case where one dimension oscillator dynamic behavior and characteristic.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
According to a kind of electromagnetic force exciting device provided by the utility model, including 1 group of high pressure Buck circuit, 1 group of low pressure
Buck circuit, 1 group of analog signal pulse width modulation circuit and 1 group of electromagnetic exciting coil.
It is exchanged as shown in Figure 1, the input terminal of high pressure Buck circuit accesses rectified filtering with the 220V of power factor compensation
The input terminal of electricity, low pressure Buck circuit is connected with the output end of high pressure Buck circuit, the input terminal of pulse width modulation circuit with
The output end of low pressure Buck circuit is connected, and the output end of pulse width modulation circuit is connected with electromagnetic exciting coil.High pressure Buck
AC220V AC rectification is depressurized to the low pressure Buck circuit that rear class is input to after DC40V-DC120V, low pressure Buck electricity by circuit
Road is input to pulse width modulation circuit after the direct current of input is depressurized to DC12V-DC24V again.Two groups of Buck circuits
Synchronous rectification is used, the output of two Buck circuits is controlled respectively by voltage hysteresis controller and gate drivers
System.
As shown in Fig. 2, the voltage hysteresis controller of control Buck circuit is amplified by output feedback voltage sample circuit, error
Device and hysteresis comparator are constituted.The output feedback voltage V of Buck circuitFBAfter the sampling of two electric resistance partial pressures, error originated from input amplifier,
Error amplifier is sent into hysteresis comparator after amplifying sampling voltage, hysteresis comparator by error signal compared with reference voltage after
Output control signal.Under the control of voltage hysteresis controller, the output feedback voltage virtual value of Buck circuit
As shown in figure 3, Pulse width modulation module is finally modulated according to the original analog of input and triangular wave carrier
The electric power for determining the pulse square wave form of frequency out, which exports, gives electromagnetic exciting coil, while being carried out using semiconductor devices to inductive coil
Synchronous rectification or afterflow, electromagnetic exciting coil just changes and changing magnetic field in axially generation intensity with analog signal, thus right
Ferromagnetism oscillator generates exciting magnetic force.
It is that following technical scheme is taken to further realize that the utility model, which solves its technical problem:
High voltage electric energy is depressurized to the low pressure Buck that rear class is input to after DC40V-DC120V by high pressure Buck circuit above-mentioned
Circuit, low pressure Buck circuit are input to pulse width modulation electricity after the direct current of input is depressurized to DC12V-DC24V again
Road.Pulse width modulation circuit, which is finally modulated according to the original analog of input, to be determined frequency pulse square wave electric power and exports to electromagnetism
Single coil excitement, electromagnetic exciting coil just changes and changing magnetic field in axially generation intensity with analog signal, thus to ferromagnetism
Oscillator generates exciting magnetic force.
High pressure Buck circuit above-mentioned, low pressure Buck circuit can be according to experiment conditions and the coil characteristics of use certain
Its output voltage is adjusted in range, regulative mode is the resistance ratio for changing the sample circuit of respective voltage hysteresis controller.
High pressure Buck circuit, low pressure Buck circuit and pulse width modulation circuit above-mentioned can be adjusted in a certain range
Circuit work frequency, Buck circuit mode of frequency regulation is the enlargement ratio for changing error amplifier in voltage hysteresis controller, and arteries and veins
Rushing width modulation circuit and adjusting the mode of working frequency is to change the frequency of input pulse signal.
Electromagnetic exciting coil above-mentioned can be according to experimental bench parameter customized.
Frequency, amplitude and the form of electro-magnetic exciting force above-mentioned can pass through setting according to experimental bench parameter designed, designed
Adjusting can be completed in corresponding analog signal and other aforementioned all variable elements.
The utility model has following function:
(1) change divider resistance ratio to change output voltage
By the sample circuit divider resistance ratio for changing two controllers, thus it is possible to vary be input to the electricity of error amplifier
The ratio of pressure and the respective output voltage of two links, and then realize the control to output voltage.
(2) accurate low frequency sinusoidal excitation is provided
Since the triangular wave or sawtooth wave frequency rate that participate in pulse width modulation are higher, after signal modulation and it is input to
The very high frequency of the high fdrequency component of aliasing in electromagnetic force single coil excitement, the resonant frequency far from one dimension oscillator, and through coil itself
The filtering of inductance, minimum energy, therefore influence is nearly free from one dimension oscillator.
(3) exiting form of diversified forms is realized
By the design to input analog signal, various forms of excitations may be implemented, not only can change the width of excitation
Value and frequency can also define the non-linear excitation for meeting certain rule.
Claims (5)
1. a kind of electromagnetic force exciting device, characterized in that including high pressure Buck circuit, low pressure Buck circuit, analog signal pulse
Width modulation circuit and electromagnetic exciting coil, the input terminal of high pressure Buck circuit access rectified filtering and power factor compensation
The input terminal of 220V alternating current, low pressure Buck circuit is connected with the output end of high pressure Buck circuit, pulse width modulation circuit
Input terminal is connected with the output end of low pressure Buck circuit, and the output end of pulse width modulation circuit is connected with electromagnetic exciting coil；
Pulse width modulation circuit finally modulates the pulse square wave shape for determining frequency according to the original analog of input and triangular wave carrier
The electric power of formula, which exports, gives electromagnetic exciting coil, while being provided with semiconductor devices and synchronizing rectification to electromagnetic exciting coil or continue
Stream, electromagnetic exciting coil just changes and changing magnetic field in axially generation intensity with analog signal, to produce to ferromagnetism oscillator
Raw exciting magnetic force.
2. electromagnetic force exciting device as described in claim 1, characterized in that by voltage hysteresis controller and gate drivers pair
The output of two Buck circuits is respectively controlled.
3. electromagnetic force exciting device as claimed in claim 2, characterized in that control Buck circuit voltage hysteresis controller by
It exports feedback voltage sample circuit, error amplifier and hysteresis comparator to constitute, the output feedback voltage V of Buck circuitFBThrough two
After electric resistance partial pressure sampling, error originated from input amplifier, error amplifier is sent into hysteresis comparator, sluggish ratio after amplifying sampling voltage
Compared with device, by error signal, output controls signal, under the control of voltage hysteresis controller, Buck circuit afterwards compared with reference voltage
Output feedback voltage virtual value:
4. electromagnetic force exciting device as described in claim 1, characterized in that Pulse width modulation module is finally according to input
The electric power that original analog and triangular wave carrier modulate the pulse square wave form for determining frequency, which exports, gives electromagnetic exciting coil, simultaneously
Rectification or afterflow are synchronized to electromagnetic exciting coil using semiconductor devices.
5. electromagnetic force exciting device as described in claim 1, characterized in that in Pulse width modulation module, original analog letter
Number and triangular wave carrier difference input comparator two input terminals, comparator output end using semiconductor devices to electromagnetism
Single coil excitement synchronizes rectification or afterflow, is specifically realized using the Xiao Jite diode and metal-oxide-semiconductor of concatenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821989238.1U CN209105033U (en) | 2018-11-29 | 2018-11-29 | Electromagnetic force exciting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821989238.1U CN209105033U (en) | 2018-11-29 | 2018-11-29 | Electromagnetic force exciting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209105033U true CN209105033U (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821989238.1U Active CN209105033U (en) | 2018-11-29 | 2018-11-29 | Electromagnetic force exciting device |
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| CN (1) | CN209105033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639143A (en) * | 2018-11-29 | 2019-04-16 | 天津大学 | Electromagnetic force exciting device |
-
2018
- 2018-11-29 CN CN201821989238.1U patent/CN209105033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639143A (en) * | 2018-11-29 | 2019-04-16 | 天津大学 | Electromagnetic force exciting device |
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