CN201041999Y - A novel device for electromagnetic bearing power amplifier - Google Patents
A novel device for electromagnetic bearing power amplifier Download PDFInfo
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- CN201041999Y CN201041999Y CNU2007200203232U CN200720020323U CN201041999Y CN 201041999 Y CN201041999 Y CN 201041999Y CN U2007200203232 U CNU2007200203232 U CN U2007200203232U CN 200720020323 U CN200720020323 U CN 200720020323U CN 201041999 Y CN201041999 Y CN 201041999Y
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- power amplifier
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- energy feedback
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Abstract
The utility model relates to a novel electromagnetic bearing power amplifier device, and belongs to the technical field of power electronics and power supplies. The device consists of a main power supply, an energy feedback device and numerous (N) power amplifier devices, wherein, the numerous (N) power amplifier devices share the energy feedback device and the main power supply; energy stored in the load of each power amplifier device is released back into the main power supply via the shared energy feedback device; the number N is equal to or larger than one; the power amplifier device comprises a power switch and a load, a clamp circuit and a PWM controller respectively connected with the power switch, and an error amplifier through a current sensor. The electromagnetic bearing power amplifier device of the utility model has good dynamic characteristics, high linearity, low power consumption, small size and high efficiency since numerous (N) power amplifiers share one main power supply and one energy feedback device.
Description
(1) technical field
The utility model relates to a kind of device of novel electromagnetic bearing power amplifier, belongs to power electronics and power technique fields.
(2) background technology
Requiring that source current output response speed is fast, frequency response is wide, distortion is little, adopting traditional circuit engineering to be difficult to realize in low in energy consumption, volume is little, efficient the is high electromagnetic bearing power amplifier device.
(3) summary of the invention
The purpose of this utility model is, provides that a kind of source current output response speed is fast, frequency response is wide, distortion is little, the device of low in energy consumption, volume is little, efficient is high novel electromagnetic bearing power amplifier.
The utility model is realized by following measure:
The device of novel electromagnetic bearing power amplifier of the present utility model, form by a main power source, an energy feedback and N Power Amplifier Unit, N the shared energy feedback of Power Amplifier Unit and a main power source, energy stored discharges go back in the main power source N 〉=1 by a shared energy feedback in the load of each Power Amplifier Unit;
Described Power Amplifier Unit includes power switch and the load that is connected with power switch respectively, clamped circuit, PWM controller, the error amplifier by current sensor.
In the above-mentioned device of the present utility model, described power switch is field effect transistor or IGBT; Described load is an inductance; Described clamped circuit is a diode; Described current sampling is a current sensor; Described energy feedback is to be connected to form successively by power filter equalizer circuit, half-bridge inversion circuit, transformer, full-wave rectifying circuit.
Device of the present utility model adopts the single switch device to form, utilize technology such as pulse-width modulation (PWM), current double closed-loop control, energy feedback control, make amplifier have the good dynamic characteristic and the linearity, well the tracing preset signal obtains high-quality electric current output in load.
The device of a kind of novel electromagnetic bearing power amplifier of the utility model, each road Power Amplifier Unit adopts single device for power switching, and the switching by the control switch device changes the average current that flows through load, obtains the electric current that can need in the load.Each road Power Amplifier Unit adds electric current negative feedback control, and load can obtain and the linear electric current of given signal like this.At the switching device blocking interval, the energy in the load provides power supply by the clamped circuit that is constituted by a diode for energy back feed device, by energy back feed device this energy is turned back on the main power source of amplifying circuit.
Electromagnetic bearing power amplifier device of the present utility model owing to adopted the shared main power source of N road power amplifier and an energy back feed device, it is good to have dynamic characteristic, linearity height, low in energy consumption, volume is little, efficient is high.
(4) description of drawings
Fig. 1 is an electromagnetic bearing power amplifier circuit structure schematic diagram
1, power switch; 2, load; 3, clamped circuit; 4, PWM controller; 5, current sampling; 6, error amplifier; 7, energy feedback.
Fig. 2 is the electromagnetic bearing power amplifier schematic diagram
Among the figure: VA, Vb are IGBT or field effect transistor; G1, G2, G3, GN are field effect transistor or IGBT; C1, C2 are storage capacitor; C3 is an electric capacity; R1, R2 are resistance; DA, DB, D1, D2, D3, DN are diode; L1, L2, L3 ... LN is an inductance; T is a transformer; CT1, CT2, CT3, CTN are current sensor.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is made specific description.
Shown in the accompanying drawing 1 the total circuit construction figure of electromagnetic bearing power amplifier device.Form by power switch 1, load 2, clamped circuit 3, PWM controller 4, current sampling 5, error amplifier 6, energy feedback 7.Each road amplifier adopts single device for power switching, and the switching by the control switch device changes the average current that flows through load, obtains the electric current that can need in the load.Each road Power Amplifier Unit adds electric current negative feedback control, and load can obtain and the linear electric current of given signal like this.At the switching device blocking interval, the energy in the load provides power supply by the clamped circuit that is constituted by a diode for energy back feed device.Energy back feed device turns back to this energy on the main power source of amplifying circuit by transformer and rectification circuit.
It shown in the accompanying drawing 2 schematic diagram of electromagnetic bearing power amplifier.Its principle is: power switch G1, G2, G3, GN are field effect transistor or IGBT; L1, L2, L3 ... LN is an inductance; Clamped circuit is made up of D1, D2, D3, DN diode; Current sampling CT1, CT2, CT3, CTN are current sensor.
The course of work of this device is: by importing given signal Vi, device for power switching is by certain switching frequency work, thereby make in the load (inductance) and obtain output current, make comparisons with this given signal by current sensor sampling back and obtain error signal in each road, error signal process error amplifier amplifies controls the PWM controller, thereby control the electric current in this load, make the electric current in the load have the good dynamic characteristic and the linearity, well the tracing preset signal satisfies technical requirement.
When a certain road device for power switching is opened, absorb energy from power supply in the load, power supply is given the load makeup energy, when device for power switching turn-offs in the load energy stored by the power supply of catching diode feedback as energy back feed device, this power supply becomes interchange feeds back to device for power switching after transformer isolation, rectification power supply through the inversion conversion.
This energy back feed device is made up of power filter equalizer circuit, half-bridge inversion circuit, transformer, full-wave rectifying circuit.The correlation of circuit each several part structure is: formed the power filter equalizer circuit by C1, C2, R1, R2, guarantee the stability of energy back feed device power supply, energy back feed device adopts half-bridge inversion circuit, and its output isolates through transformer T after full-wave rectification output is connected to the power supply two ends of device for power switching.
Claims (6)
1. the device of a novel electromagnetic bearing power amplifier, it is characterized in that: form by a main power source, an energy feedback and N Power Amplifier Unit, N the shared energy feedback of Power Amplifier Unit and a main power source, energy stored discharges go back in the main power source N 〉=1 by a shared energy feedback in the load of each Power Amplifier Unit;
Described Power Amplifier Unit includes power switch (1) and the load (2) that is connected with power switch respectively, clamped circuit (3), PWM controller (4), the error amplifier (6) by current sampling (5).
2. device according to claim 1 is characterized in that: described power switch (1) is field effect transistor or IGBT.
3. device according to claim 1 is characterized in that: described load (2) is an inductance.
4. device according to claim 1 is characterized in that: described clamped circuit (3) is a diode.
5. device according to claim 1 is characterized in that: described current sampling (5) is a current sensor.
6. device according to claim 1 is characterized in that: described energy feedback is to be connected to form successively by power filter equalizer circuit, half-bridge inversion circuit, transformer, full-wave rectifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200203232U CN201041999Y (en) | 2007-04-04 | 2007-04-04 | A novel device for electromagnetic bearing power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200203232U CN201041999Y (en) | 2007-04-04 | 2007-04-04 | A novel device for electromagnetic bearing power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041999Y true CN201041999Y (en) | 2008-03-26 |
Family
ID=39253710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200203232U Expired - Fee Related CN201041999Y (en) | 2007-04-04 | 2007-04-04 | A novel device for electromagnetic bearing power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041999Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038811B (en) * | 2007-04-04 | 2011-05-04 | 山东新风光电子科技发展有限公司 | Device for novel electromagnetic bearing power amplifier |
-
2007
- 2007-04-04 CN CNU2007200203232U patent/CN201041999Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038811B (en) * | 2007-04-04 | 2011-05-04 | 山东新风光电子科技发展有限公司 | Device for novel electromagnetic bearing power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20120404 |