CN205070950U - Three level switch power amplifier - Google Patents
Three level switch power amplifier Download PDFInfo
- Publication number
- CN205070950U CN205070950U CN201520440595.2U CN201520440595U CN205070950U CN 205070950 U CN205070950 U CN 205070950U CN 201520440595 U CN201520440595 U CN 201520440595U CN 205070950 U CN205070950 U CN 205070950U
- Authority
- CN
- China
- Prior art keywords
- circuit
- bridge
- signal
- switch
- regulating
- 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.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- 230000001276 controlling effect Effects 0.000 claims description 22
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 abstract description 4
- 101100293261 Mus musculus Naa15 gene Proteins 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 239000000725 suspension Substances 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
- Inverter Devices (AREA)
Abstract
The utility model discloses a three level switch power amplifier, its control regulating circuit include that bridge switch tube drive signal produces the circuit and produces the circuit with lower bridge switch tube drive signal, and the current feedback signal of bearing coil obtains error signal with set signal through the PI regulating circuit on the one hand, and reentrant PWM regulator forms the drive signal who goes up the bridge switch tube, on the one hand obtain error signal with set signal after enlargeing the modulate circuit through the PI regulating circuit, reentrant PWM regulator forms the drive signal of bridge switch tube down, then with drive signal the opening and turn -offing of power tube in pulse modulation circuit and driving isolation circuit direct control power switch bridge circuit to reach control electromagnetic bearing coil current's mesh.
Description
Technical field
The utility model belongs to switch power amplifier field, is specifically related to a kind of tri-level switch power amplifier.
Background technology
Traditional mechanical type thrust bearing has the defects such as friction, wearing and tearing and consequent temperature rise, affects speed and the precision of rotating machinery.And magnetic suspension bearing utilizes magneticaction by rotor suspension in the air, then rotor is driven with electric rotating machine, make it rotate around particular axis, contactless between rotor and stator, without friction, long service life, need not lubricate, high-precision one is novel, high-performance bearing.
In suspension of five-freedom degree magnetic bearing control system, power amplifier is a very important part in magnetic suspension bearing control system.Active magnetic bearing system in early days more adopts linear power amplifier, due to deficiencies such as the efficiency of Linear Power Amplifier are lower, volume is relatively large, power accommodation is little, in present active magnetic bearing system, nearly all adopt the switch power amplifier that efficiency is high, dynamic characteristic is good.Magnetic suspension bearing close power amplifier comparatively early mostly adopts electric current two multilevel modulation technique, there is the shortcomings such as current ripples is large, dynamic characteristic is limited, and three level modulation technique can reduce current ripples effectively, reduce electromagnetic noise, reduce the copper loss of coil simultaneously, be conducive to the current response rate and the control response speed that improve close power amplifier in addition, and then improve the overall performance of system.
Chinese patent grant number is that the patent document of ZL100461627C discloses a kind of tri-level switch power amplifier control method; comprise signal mixed processing circuit, pulse-width modulation circuit, protection and optical couple isolation drive circuit; and the signal of in the future self-controller carries out process and obtains corresponding voltage signal and drive bridge circuit, thus the size of current of control load.The signal mixed processing circuit of this amplifier is reserved by the voltage that the current signal of the inductive load fed back in the solenoid of power switch bridge circuit and quiescent current regulate and the signal plus process of PID controller, outputs signal by Direct driver power switch pipe after pulsewidth bar value circuit and optical couple isolation drive circuit.This control mode is employing inverter oppositely carrys out to realize respectively upper and lower switching tube control to PID signal, and the utility model provides tri-level switch power amplifier that is a kind of and the complete different control modes of aforesaid way.
Utility model content
The purpose of this utility model is to provide a kind of tri-level switch power amplifier, can improve current response rate and the control response speed of close power amplifier.
In order to realize above object, the technical scheme that the utility model adopts is: a kind of tri-level switch power amplifier, comprise the power switch bridge circuit with switch on the bridge pipe and bridge switch pipe and the electromagnetic bearing coil Lm be connected between two switching tubes, on described, the drive singal of bridge switch pipe is produced by switch controlled circuit, this switch controlled circuit comprises pulse modulated circuit, isolated drive circuit and regulating and controlling circuit, the output signal of described regulating and controlling circuit passes through pulse modulated circuit, the corresponding power switch pipe of isolated drive circuit rear drive power switch bridge circuit, described regulating and controlling circuit is used for the solenoid current feedback signal of Setting signal and power switch bridge circuit to process, this regulating and controlling circuit comprises switch on the bridge pipe drive signal generation circuit and bridge switch pipe drive signal generation circuit, on, bridge switch pipe drive signal generation circuit include connect in turn for PI regulating circuit that current feedback signal and Setting signal are carried out processing and PWM controller, and bridge switch pipe drive signal generation circuit also comprises the amplification modulate circuit for carrying out Setting signal to amplify process, this amplification modulate circuit is connected to the Setting signal input of corresponding PI regulating circuit.
Described regulating and controlling circuit also comprises for amplifying current feedback signal, the signal conditioning circuit of filtering and conditioning.
Described amplification modulate circuit comprises amplifier U5A, and the inverting input of U5A is used for being connected with Setting signal with resistance R42 by the resistance R41 of parallel connection, and the output of U5A is connected with its inverting input by resistance R43.
Described PI regulating circuit comprises an amplifier, and the in-phase input end of amplifier is for connecting Setting signal, and its inverting input is used for being connected with current feedback signal.
The chip that described pwm modulator adopts duty ratio 0% ~ 100% adjustable.
Described pulse modulated circuit adopts and door chip CD4081BM.
The regulating and controlling circuit of the utility model tri-level switch power amplifier comprises switch on the bridge pipe drive signal generation circuit and bridge switch pipe drive signal generation circuit, the current feedback signal of bearing coil obtains error signal with Setting signal through PI regulating circuit on the one hand, then enters the drive singal that pwm modulator forms switch on the bridge pipe; Error signal is obtained through PI regulating circuit on the one hand with through amplifying the Setting signal after modulate circuit, enter the drive singal that pwm modulator forms bridge switch pipe again, then drive singal pulse modulated circuit and driving isolation circuit are directly controlled opening and shutoff of power tube in power switch bridge circuit, thus reach the object controlling electromagnetic bearing coil current.
Accompanying drawing explanation
Fig. 1 is the power switch pipe bridge circuit of the utility model tri-level switch power amplifier theory structure schematic diagram;
Fig. 2 is the switch controlled circuit of the utility model tri-level switch power amplifier theory structure schematic diagram;
Fig. 3 is the circuit theory diagrams that in regulating and controlling circuit, switch on the bridge pipe drive singal produces;
The circuit theory diagrams that in Fig. 4 regulating and controlling circuit, bridge switch pipe drive singal produces;
Fig. 5 is the circuit theory diagrams of PWM controller of the present utility model;
Fig. 6 is the circuit theory diagrams of pulse modulated circuit of the present utility model;
Fig. 7 is full-bridge circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 1 the schematic diagram of the utility model tri-level switch power amplifier embodiment, as seen from the figure, this amplifier comprises power switch bridge circuit and is connected to the electromagnetic bearing coil Lm between two switching tubes, the power switch bridge circuit of the present embodiment is half-bridge major loop, comprise switch on the bridge pipe Q1 and bridge switch pipe Q2, Q1 and Q2 is MOSFET or IGBT, D1 and D2 is power diode, electrochemical capacitor E1 and noninductive electric capacity C1 is the effect of the spike of supporting bus voltage and absorber power device, Rm is the resistance of electromagnetism axis coil, current transformer series connection is in the loop for inductive current of sampling, its current feedback signal is ILF.The control method of this three level power amplifier comprises the steps:
(1) during charging, switch on the bridge pipe carries out opening and shutoff of change in duty cycle under the control of corresponding drive singal, bridge switch pipe Q2 keeps opening state, when Q1, Q2 all open, Q1, current transformer, Rm, Lm and Q2 form charge circuit, when Q1 shutoff, Q2 open, D2, current transformer, Rm, Lm and Q2 form continuous current circuit;
(2) during electric discharge, bridge switch pipe Q2 opens and shutoff under the control of corresponding drive singal, switch on the bridge pipe Q1 keeps off state, when Q2 opens, D2, current transformer, Rm, Lm and Q2 form continuous current circuit, when Q2 turns off, Lm is in discharge condition, forms the discharge loop be made up of D2, current transformer, Rm, Lm and D1.
On in the present embodiment power switch bridge circuit, lower switching tube drive singal is produced by switch controlled circuit, as shown in Figure 2, this switch controlled circuit comprises pulse modulated circuit, isolated drive circuit and regulating and controlling circuit, the output signal of regulating and controlling circuit passes through pulse modulated circuit, the corresponding power switch pipe of isolated drive circuit rear drive power switch bridge circuit, regulating and controlling circuit is used for the solenoid current feedback signal of Setting signal and power switch bridge circuit to process, this regulating and controlling circuit comprises switch on the bridge pipe drive signal generation circuit and bridge switch pipe drive signal generation circuit, on, bridge switch pipe drive signal generation circuit include connect in turn for PI regulating circuit that current feedback signal and Setting signal are carried out processing and PWM controller, and bridge switch pipe drive signal generation circuit also comprises the amplification modulate circuit for carrying out Setting signal to amplify process, this amplification modulate circuit is connected to the Setting signal input of corresponding PI regulating circuit.
The power switch bridge circuit of the present embodiment is half-bridge major loop, comprise switch on the bridge pipe Q1 and bridge switch pipe Q2, Q1 and Q2 is MOSFET or IGBT, D1 and D2 is power diode, electrochemical capacitor E1 and noninductive electric capacity C1 is the effect of the spike of supporting bus voltage and absorber power device, and Rm is the resistance of electromagnetism axis coil, and Lm is the inductance of electromagnetic bearing coil, current transformer series connection is in the loop for inductive current of sampling, and its current feedback signal is ILF.
The G pole of Q1 is connected with drive singal DRV1_G by resistance R11, and R11 two ends are parallel with the series arm of resistance R10 and diode D11, and the S pole of Q1 is connected with drive singal DRV1_E, and is connected with resistance R12 between G pole and S pole; The G pole of Q2 is connected with drive singal DRV2_G by resistance R21, and R21 two ends are parallel with the series arm of resistance R20 and diode D5, and the S pole of Q2 is connected with drive singal DRV2_E, and is connected with resistance R22 between G pole and S pole.
This regulating and controlling circuit also comprises for amplifying current feedback signal, the signal conditioning circuit of filtering and conditioning.
In regulating and controlling circuit, the generation of the drive singal G1 of switch on the bridge pipe as shown in Figure 3, and current feedback signal ILF obtains signal IFA after amplification, filtering and conditioning.IFA receives the inverting input of the accurate amplifier OPA2277U of U4A through resistance R32, signal IGA after Setting signal IG nurses one's health receives the in-phase input end of the accurate amplifier of U4A through resistance R33 and electric capacity C32, given with feedback obtain error signal EO1 through PI regulating circuit, PI parameter is determined by electric capacity C33 and resistance R34, electric capacity C34, simultaneously by the impact of feed-forward capacitance C32.
EO1 enters the error signal input of pwm modulator, and the chip duty cycle that its pwm modulator adopts can be 0% ~ 100% adjustable, and the utility model example adopts UC3843, is regulated the duty ratio of the output square wave of UC3843 by error signal.
In regulating and controlling circuit, the generation of the drive singal G2 of bridge switch pipe as shown in Figure 4, Setting signal IG obtains signal IGB after nursing one's health, amplification modulate circuit through resistance R41, resistance R42, resistance R43 and amplifier U5A formation realizes the amplification lifting of the particular power of Setting signal IGB, the present embodiment preferably amplification of 1.01 times, the parallel circuits that the inverting input of U5A is used for consisting of resistance R41 and resistance R42 is connected with IGB, its in-phase input end is by resistance R44 ground connection, and the output of U5A is connected with its inverting input by resistance R43; Output signal is after filter resistance R45 and filter capacitor C41 filtering, received the in-phase input end of the accurate amplifier OPA2277U of PI regulating circuit U6A again by resistance R51 and electric capacity C51 through amplifier U5B, feedback signal IFB after conditioning receives the inverting input of the accurate amplifier of U6A through resistance R52, Setting signal and feedback signal obtain error signal EO2 through PI regulating circuit, PI parameter is determined by electric capacity C52 and resistance R53, electric capacity C53, simultaneously by the impact of feed-forward capacitance C51.
As shown in Figure 5, (X is wherein 1 or 2 to the signal EOX exported from PI regulating circuit, i.e. EO1 and EO2) enter pwm modulator UC3843BN error signal input pin the 1st pin, its operating frequency is determined by the outer meeting resistance RT of the 4th pin and electric capacity CT, its the 3rd pin is the signal after current voltage distribution, compare generation change in duty cycle for error signal with it, its 6th pin is the output pin driving square wave.The chip duty cycle that pwm modulator adopts can be 0% ~ 100% adjustable, regulated the duty ratio of the output square wave of UC3843BN by error signal.
As shown in Figure 6, this pulse modulated circuit adopts and door chip CD4081BM, drive singal GX (X is 1 or 2) enters and input pin 1 pin of door U2XA and 2 pin, 1 pin and 2 pin short circuits simultaneously, input pin 5 pin with door U2XB is connect with output 3 pin of door, fault-signal level OFF connects input pin 6 pin of U2XB, and output pin 4 pin of its U2XB and door is DRVX signal, and X recited above is 1 or 2.
Drive singal G1, G2 pulse modulated circuit and isolated drive circuit obtain DRV1_G, DRV1_E and DRV2_G, DRV2_E, carry out opening and shutoff of power switch pipe Q1 and Q2 in Direct driver half-bridge major loop respectively, thus reach the object controlling electromagnetic bearing coil current.
Operation principle and the process of the utility model tri-level switch power amplifier control method are as follows: because Setting signal IGB has the lifting of 1/100, when charging, power switch pipe Q1 carries out opening and shutoff of change in duty cycle under the control of PWM controller UC3843; Now control power switch pipe Q2 and keep opening state under the control of PWM controller UC3843BN, therefore achieve the freewheeling state of Q1, current transformer, the charged state of Rm, Lm and Q2 or D2, current transformer, Rm, Lm and Q2; Upon discharging, power switch pipe Q2 carries out opening and shutoff of change in duty cycle under the control of PWM controller UC3843BN, signal IGA is that Setting signal is identical with IG amplitude, then power switch pipe Q1 is in off state all the time, therefore achieves the discharge condition of D2, current transformer, the freewheeling state of Rm, Lm and Q2 or D2, current transformer, Rm, Lm and D1.
The power switch bridge circuit of the present embodiment is semibridge system main circuit, can certainly adopt full bridge circuit, as shown in Figure 7, comprise Q1 ~ Q4 tetra-power tubes, wherein, Q1, Q3 are upper bridge power tube, Q2, Q4 are lower bridge power tube, and its control principle is identical with full-bridge circuit.
Above embodiment only understands core concept of the present utility model for helping; the utility model can not be limited with this; for those skilled in the art; every according to thought of the present utility model; the utility model is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection range of the present utility model.
Claims (6)
1. a tri-level switch power amplifier, comprise the power switch bridge circuit with switch on the bridge pipe and bridge switch pipe and the electromagnetic bearing coil Lm be connected between two switching tubes, it is characterized in that, on described, the drive singal of bridge switch pipe is produced by switch controlled circuit, this switch controlled circuit comprises pulse modulated circuit, isolated drive circuit and regulating and controlling circuit, the output signal of described regulating and controlling circuit passes through pulse modulated circuit, the corresponding power switch pipe of isolated drive circuit rear drive power switch bridge circuit, described regulating and controlling circuit is used for the solenoid current feedback signal of Setting signal and power switch bridge circuit to process, this regulating and controlling circuit comprises switch on the bridge pipe drive signal generation circuit and bridge switch pipe drive signal generation circuit, on, bridge switch pipe drive signal generation circuit include connect in turn for PI regulating circuit that current feedback signal and Setting signal are carried out processing and PWM controller, and bridge switch pipe drive signal generation circuit also comprises the amplification modulate circuit for carrying out Setting signal to amplify process, this amplification modulate circuit is connected to the Setting signal input of corresponding PI regulating circuit.
2. tri-level switch power amplifier according to claim 1, is characterized in that: described regulating and controlling circuit also comprises for amplifying current feedback signal, the signal conditioning circuit of filtering and conditioning.
3. tri-level switch power amplifier according to claim 1 and 2, it is characterized in that: described amplification modulate circuit comprises amplifier U5A, the inverting input of U5A is used for being connected with Setting signal with resistance R42 by the resistance R41 of parallel connection, and the output of U5A is connected with its inverting input by resistance R43.
4. tri-level switch power amplifier according to claim 3, is characterized in that: described PI regulating circuit comprises an amplifier, and the in-phase input end of amplifier is for connecting Setting signal, and its inverting input is used for being connected with current feedback signal.
5. tri-level switch power amplifier according to claim 1, is characterized in that: the chip that described pwm modulator adopts duty ratio 0% ~ 100% adjustable.
6. tri-level switch power amplifier according to claim 1, is characterized in that: described pulse modulated circuit adopts and door chip CD4081BM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440595.2U CN205070950U (en) | 2015-06-24 | 2015-06-24 | Three level switch power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440595.2U CN205070950U (en) | 2015-06-24 | 2015-06-24 | Three level switch power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205070950U true CN205070950U (en) | 2016-03-02 |
Family
ID=55397450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520440595.2U Active CN205070950U (en) | 2015-06-24 | 2015-06-24 | Three level switch power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205070950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935279A (en) * | 2015-06-24 | 2015-09-23 | 许继电源有限公司 | Three-level switch power amplifier |
-
2015
- 2015-06-24 CN CN201520440595.2U patent/CN205070950U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935279A (en) * | 2015-06-24 | 2015-09-23 | 许继电源有限公司 | Three-level switch power amplifier |
| CN104935279B (en) * | 2015-06-24 | 2018-09-14 | 许继电源有限公司 | A kind of tri-level switch power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209479443U (en) | A kind of battery heating system | |
| CN102751793B (en) | Wireless power transfer system based on bilateral power flow control and control method thereof | |
| CN105429313A (en) | Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof | |
| CN101582640A (en) | High-efficiency low-electromagnetic interference power converter | |
| CN101127490A (en) | A high power transistor frequency conversion power supply | |
| CN106301036A (en) | Magnetic suspension bearing switch power amplifier and control method thereof | |
| CN103490661A (en) | All-solid-state high voltage pulse current source with positive and negative pulse output | |
| CN204696950U (en) | Magnetic suspension bearing switch power amplifier | |
| CN103746439A (en) | Energy-saving type storage battery formation charge and discharge power supply | |
| CN202872643U (en) | Electric automobile vehicular charger and resonance circuit device | |
| CN209217738U (en) | A kind of active equalization of battery device containing forward converter | |
| CN205070950U (en) | Three level switch power amplifier | |
| CN109450041A (en) | A kind of wireless charging device of multi gear position | |
| CN214480274U (en) | DC conversion circuit | |
| CN105680576A (en) | Novel wireless electric energy transmission system of single-phase load | |
| CN204615691U (en) | Be applied to the double-direction control drive circuit of energy storage inverter | |
| CN104935279A (en) | Three-level switch power amplifier | |
| CN205725554U (en) | PMSM Drive System based on matrix converter | |
| CN107612160A (en) | A kind of magnetic coupling parallel resonance formula wireless electric energy transmission device | |
| CN201332521Y (en) | IGBT serial inversion type quick melting furnace | |
| CN105048968A (en) | Control method for three-level power amplifier | |
| CN201113944Y (en) | High speed switch tube floating grid driver circuit | |
| CN203398993U (en) | Full-bridge resonant transformation circuit of contactless power transmission | |
| CN203340358U (en) | Solar energy powered LED constant-current driving power with controllable voltage | |
| CN204190420U (en) | A kind of Novel photovoltaic battery charging circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |