CN204906195U - Electromagnetic emission machine - Google Patents
Electromagnetic emission machine Download PDFInfo
- Publication number
- CN204906195U CN204906195U CN201520339849.1U CN201520339849U CN204906195U CN 204906195 U CN204906195 U CN 204906195U CN 201520339849 U CN201520339849 U CN 201520339849U CN 204906195 U CN204906195 U CN 204906195U
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- Prior art keywords
- bridge
- inverter bridge
- level inverter
- circuit
- filter capacitor
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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 relates to an electromagnetic emission machine, include: generating set, separates value electric capacity, high -frequency transformer, high frequency rectifier bridge, LC filter circuit and second grade contravariant bridge at three phase bridge, filter capacitance, one -level contravariant bridge, resonant inductance, generating set, three phase bridge connection, filter capacitance, one -level contravariant bridge, high -frequency transformer, high frequency rectifier bridge, LC filter circuit, second grade contravariant bridge and output port connect gradually, resonant inductance and separate value electric capacity and establish ties on the circuit between one -level contravariant bridge and the former limit of high -frequency transformer, parallelly connected on every power device of one -level contravariant bridge have a filter capacitance, filter capacitance, resonant inductance and separate worth electric capacity formation resonance circuit, it has supplementary electric current source network to connect in parallel on the lagging leg of one -level contravariant bridge. The utility model discloses an use soft switch technology to one -level contravariant bridge for the power device of one -level contravariant bridge is zero at the voltage that the in -process bore of opening or turn -offing, realizes the zero voltage switch of power device.
Description
Technical field
The utility model relates to power rectifier inversion transformation technique field, particularly, relates to a kind of electromagnetics transmitter.
Background technology
Electromagnetics transmitter is by obtaining earth medium to the response of incident electromagnetic field, building the distributed intelligence of underground medium conductivity.Metallic ore has good conductivity usually, and therefore electromagnetic method finds the most effective geophysical exploration means of metallic ore.
Along with the fast development of modern power electronics technology and device, the topological structure of electromagnetics transmitter main circuit is also changing.At present, the topological structure of electromagnetics transmitter main flow adopts two-stage inversion to be main, its power section is exactly a Switching Power Supply in essence, the voltage that the power output improving transmitter just will inevitably cause switching tube to bear or electric current increase, iff using common pulse modulation technology, the switching loss of switching tube so will be caused significantly to increase, produce serious Voltage and Current Spikes simultaneously, the electric stress of device in circuit is increased, burn device, and also will bring serious electromagnetic interference problem.
Utility model content
The utility model provides a kind of electromagnetics transmitter, and by using soft switch technique to one-level inverter bridge, the voltage that the power device of one-level inverter bridge is born in the process opened or turn off is zero, realizes the zero voltage switch of power device.
For this purpose, the utility model proposes a kind of electromagnetics transmitter, it is characterized in that, described electromagnetics transmitter comprises:
Generating set, three-phase commutation bridge, filter capacitor, one-level inverter bridge, resonant inductance, every value electric capacity, high frequency transformer, high-frequency rectification bridge, LC filter circuit and secondary inverter bridge;
Wherein, described generating set is connected with described three-phase commutation bridge, for output AC electricity to described three-phase commutation bridge; The output of described three-phase commutation bridge is connected with described filter capacitor, for outputting to described filter capacitor by forming direct current after the three-phase alternating current electric rectification of input, the output of described filter capacitor is connected with described one-level inverter bridge, described one-level inverter bridge is outputted to after the direct current of reception is carried out filtering, the output of described one-level inverter bridge is connected with the former limit of described high frequency transformer, for the filtered DC inverter received being produced ac square wave and outputting to the former limit of described high frequency transformer; Secondary and the described high-frequency rectification bridging of described high frequency transformer connect, described high-frequency rectification bridge is outputted to after being boosted by the ac square wave of reception, the output of described high-frequency rectification bridge is connected with described LC filter circuit, for the ac square wave rectification after described boosting is formed direct current square wave, described LC filter circuit is connected with described secondary inverter bridge, direct current square wave filtering for receiving forms direct current, and described secondary inverter bridge produces different square waves after the direct current of reception is carried out inversion and outputs to output port;
Described resonant inductance and described every being worth on the circuit of capacitances in series between described one-level inverter bridge and the former limit of described high frequency transformer, each power device of described one-level inverter bridge is parallel with filter capacitor, described filter capacitor, resonant inductance and form resonant tank every being worth electric capacity, for controlling described one-level inverter bridge;
Described electromagnetics transmitter also comprises the auxiliary current source network in parallel with the lagging leg of described one-level inverter bridge, is turning on and off the voltage in process for regulating the lagging leg of described one-level inverter bridge.
Wherein, the circuit between the output of described filter capacitor and the input of described one-level inverter bridge is also parallel with bleeder resistance, for when described filter capacitor quits work, and the electric energy that described filter capacitor two ends of releasing store.
Wherein, the circuit between the secondary of described high frequency transformer and the input of described high-frequency rectification bridge is also parallel with resistance capaciting absorpting circuit, and described resistance capaciting absorpting circuit comprises the 3rd electric capacity and the second resistance that are connected in series.
Wherein, the power device of described one-level inverter bridge adopts phase-shifting full-bridge control model, and the drive singal of the power device of described one-level inverter bridge is produced by TMS320F28335.
Wherein, described one-level inverter bridge is H type inverter bridge.
Wherein, described H type inverter bridge is 2 insulated gate bipolar transistor modules or an Intelligent Power Module.
Described auxiliary current source networking comprises the first diode in parallel and the second diode, and the auxiliary induction of connecting with the circuit after described first diode and the second diodes in parallel; Described first diode is parallel with the first electric capacity, described second diode is parallel with the second electric capacity.
The electromagnetics transmitter that the utility model provides, by using soft switch technique, one-level inverter bridge realizes the switch control rule to one-level inverter bridge by use resonant tank, make the power device of one-level inverter bridge in the engineering opened or turn off, the voltage born is zero, realize the zero voltage switch ZVS of power device, thus solve large power, electrically magnetic transmitter operationally, because high-voltage large current causes serious power device switching loss and the problem of too high Voltage and Current Spikes and powerful electromagnetic interference.
Accompanying drawing explanation
Can understanding feature and advantage of the present utility model clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the utility model, in the accompanying drawings:
Fig. 1 shows the circuit diagram of electromagnetics transmitter of the present utility model.
Fig. 2 shows the schematic diagram of the drive singal of one-level inverter bridge of the present utility model.
Fig. 3 shows the high frequency transformer former secondary voltage current spike schematic diagram in the Sofe Switch situation of the one-level inverter bridge of electromagnetics transmitter of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
Fig. 1 shows the circuit diagram of electromagnetics transmitter of the present utility model.
As shown in Figure 1, a kind of electromagnetics transmitter of the present utility model, is characterized in that, described electromagnetics transmitter comprises:
Generating set 10, three-phase commutation bridge 20, filter capacitor C1, one-level inverter bridge 30, resonant inductance L2, every value electric capacity C2, high frequency transformer T, high-frequency rectification bridge 40, LC filter circuit 50 and secondary inverter bridge 60;
In foregoing circuit, generating set 10 is connected with three-phase commutation bridge 20, and three-phase alternating current is outputted to the input of three-phase commutation bridge 20 by generating set 10; The output of three-phase commutation bridge 20 is connected with filter capacitor C1, and three-phase commutation bridge 20 outputs to filter capacitor C1 by forming direct current after the three-phase alternating current electric rectification of input; The output of filter capacitor C1 is connected with one-level inverter bridge 30, and filter capacitor C1 outputs to one-level inverter bridge 30 after the direct current of reception is carried out filtering.The output of one-level inverter bridge 30 is connected with the former limit of high frequency transformer T, and the filtered DC inverter received is produced ac square wave and outputs to the former limit of high frequency transformer T by one-level inverter bridge 30; The secondary of high frequency transformer T is connected with high-frequency rectification bridge 40, high frequency transformer T outputs to high-frequency rectification bridge 40 after being boosted by the ac square wave of reception, the output of high-frequency rectification bridge 40 is connected with LC filter circuit 50, ac square wave rectification after boosting is formed direct current square wave, LC filter circuit 50 is connected with secondary inverter bridge 60, direct current square wave filtering for receiving forms direct current, and secondary inverter bridge 60 produces different square waves after the direct current of reception is carried out inversion and outputs to output port.
In the present embodiment, resonant inductance L2 and be connected on the circuit between one-level inverter bridge 30 and high frequency transformer T every value electric capacity C2, each power device of one-level inverter bridge 30 is parallel with filter capacitor Cr1 ~ Cr4, filter capacitor Cr1 ~ Cr4, resonant inductance L2 with form resonant tank every being worth electric capacity C2, for controlling described one-level inverter bridge.In addition, the DC component can also removed every value electric capacity C2 in the former limit alternating current of high frequency transformer T of the present embodiment, ensures that the former limit of high frequency transformer T is without magnetic bias.
In the circuit of the present embodiment, by filter capacitor Cr1 ~ Cr4, resonant inductance L2 with form resonant tank every being worth electric capacity C2, thus achieve the switch using soft switch technique to control one-level inverter bridge 30, make the power device Q1 ~ Q4 of one-level inverter bridge 30 be zero turning on and off the voltage born in process.
In above-described embodiment, one-level inverter bridge can use H type inverter bridge, and this H type inverter bridge can be 2 insulated gate bipolar transistor modules or an Intelligent Power Module.
In addition, in order to realize the zero voltage switch of one-level inverter bridge 30, the contribution device of above-mentioned one-level inverter bridge 30 adopts phase-shifting full-bridge control model, and the drive singal of the power device of one-level inverter bridge is produced by TMS320F28335.
TMS320F28335 is Floating-point DSP controller, compared with the fixed DSP used with existing electromagnetics transmitter, it is high that this device has precision, and cost is low, power consumption is little, performance is high, and peripheral hardware integrated level is high, data and program memory space large, the A/D conversion more accurately feature such as quick, replace traditional integrated IC as controller with it, not only there is the features such as control precision is high, applying flexible, peripheral auxiliary circuits are simple, complicated software algorithm can also be realized simultaneously.
In addition, the circuit between the output and the input of one-level inverter bridge 30 of filter capacitor C1 is also parallel with bleeder resistance R1, bleeder resistance R1 is used for when filter capacitor C1 quits work, the electric energy that filter capacitor C1 two ends of releasing store.
In addition, the circuit between the secondary and the input of high-frequency rectification bridge 40 of high frequency transformer T is also parallel with resistance capaciting absorpting circuit 70, and this resistance capaciting absorpting circuit comprises the 3rd electric capacity C3 and the second resistance R2 that are connected in series.
The operation principle of electromagnetics transmitter of the present utility model is as follows:
The drive singal of the power device of the one-level inverter bridge of the present embodiment is produced by TMS320F28335.Its oscillogram as shown in Figure 2, wherein, one, four-way drive waveforms driving power device Q1, Q4, two, triple channel drive waveforms driving power device Q2, Q3.
According to the circuit structure of Fig. 1, when Q1, Q4 conducting, V
aB=+V
in, primary side current of transformer is by loop Q1 → A → C2 → L2 → B → Q4 → Q1, and due to the non-conducting of Q2, now electric capacity Cr2 both end voltage equals DC bus-bar voltage V
in; Have no progeny when Q1 pipe closes, due to the effect of L2, the sense of current in transformer primary side loop remains unchanged, and now, Cr1 charges, and Cr2 discharges, until Cr1 voltage rise is to V
in, it is 0 that Cr2 discharges into voltage, subsequently the conducting of D2 nature, and current circuit is D2 → A → C2 → L2 → B → Q4 → D2; Because Cr1 during Q1 conducting is shorted, voltage is zero, and capacitance voltage can not be undergone mutation, therefore, be zero voltage turn-off when Q1 turns off, due to the clamping action of D2, short-circuit condition is equivalent to during Q2 conducting, both end voltage is zero, and therefore Q2 is no-voltage conducting, is next that Q4 turns off, in like manner, because Cr4 both end voltage can not be undergone mutation, so the shutoff of Q4 is also zero voltage turn-off, closes at Q4 and have no progeny, electric current in loop can discharge to Cr3, Cr4 charges, when Cr3 voltage is that zero, Cr4 voltage rise is to V
inafter, D3 nature conducting, for primary side current of transformer provides loop, simultaneously by Q3 voltage clamping zero, and then Q3 no-voltage is open-minded, now V
aB=-V
in, after primary current is reduced to zero, electric current starts reverse increase, until maximum, next just start the action of another half period, principle is identical with upper.
In said process, in order to ensure that each power device (particularly delayed bridge wall) normally can realize ZVS, the choosing of inductance value of L2 will ensure before Q3 opens, afterflow process in loop, former limit can not stop, otherwise Q3 cannot realize Sofe Switch, because afterflow process is once cut-off, D3 cannot conducting, and Q3, Q4 respectively bear V
in/ 2 voltages, Q3 opens with voltage (the another half period is like this equally), the inductance value of L2 is larger, time of afterflow is longer, but the increase of inductance value will can cause duty-cycle loss too much again, conventional method uses pulsactor to replace resonant inductance, but for high-power transmitter, because its power output is large, primary side current of transformer is high, and pulsactor is in big current saturation condition for a long time, heating and serious, therefore, in large power, electrically magnetic transmitter, pulsactor is used in resonant tank and inadvisable.
In order to reduce the inductance value of resonant inductance as much as possible to reduce duty-cycle loss, guaranteed delayed bridge wall energy enough realizes ZVS simultaneously, in another embodiment of the application, auxiliary current source network 80 can be used to help delayed bridge wall and realize ZVS.
In native system, use auxiliary current source network in parallel with delayed bridge wall, described auxiliary current source networking comprises the first diode in parallel and the second diode, and the auxiliary induction of connecting with the circuit after described first diode and the second diodes in parallel; Described first diode is parallel with the first electric capacity, described second diode is parallel with the second electric capacity.
As shown in Figure 1, be connected in parallel on the electric capacity Cr5 on diode D5, be connected in parallel on the electric capacity Cr6 on diode D6, when Q4 turns off, the electric current of primary current and auxiliary induction L1 flows into Node B simultaneously, and jointly to Cr3 electric discharge, Cr4 charges; When Q3 turns off, the electric current of primary current and auxiliary induction L1 flows out Node B simultaneously, and jointly to Cr3 charging, Cr4 discharges; Therefore contribute to delayed bridge wall by auxiliary current source network and realize ZVS in wider output power range, the inductance value of resonant inductance can be reduced to reduce duty-cycle loss simultaneously.
Because the power device of one-level inverter bridge is to open the voltage with bearing when turning off almost nil, although therefore there is electric current to flow through power device, but the product of voltage and electric current (namely power) reduces greatly relative to hard switching, thus reduce the switching loss of power device to a great extent, particularly in the higher situation of power device switching frequency, therefore the operating efficiency of transmitter is greatly improved; In addition, because power device own loss reduces, so the heat condition of power device have also been obtained larger improvement; Equally also because power device bears voltage hardly in switching process, avoid power device in switching process due to due to voltage spikes that ghost effect causes, thus effectively reducing the electric stress that device bears, the electromagnetic interference (EMI) simultaneously also made obtains remarkable improvement.
Fig. 3 is after circuit of the present utility model uses soft switch technique, and adopt 380V input, the high-power output of 30kW, transformer primary secondary voltage current waveform spike is still very little.Fig. 3 mono-passage is one-level inverter output voltage waveform, and two passages are transformer secondary voltage waveform, and triple channel is primary voltage of transformer waveform, and four-way is primary side current of transformer waveform.
The electromagnetics transmitter that the utility model provides, by using soft switch technique, one-level inverter bridge realizes the switch control rule to one-level inverter bridge by use resonant tank, make the power device of one-level inverter bridge in the engineering opened or turn off, the voltage born is zero, realize the zero voltage switch ZVS of power device, thus solve large power, electrically magnetic transmitter operationally, because high-voltage large current causes serious power device switching loss and the problem of too high Voltage and Current Spikes and powerful electromagnetic interference.
Although describe execution mode of the present utility model by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations when not departing from spirit and scope of the present utility model, such amendment and modification all fall into by within claims limited range.
Claims (7)
1. an electromagnetics transmitter, is characterized in that, described electromagnetics transmitter comprises:
Generating set, three-phase commutation bridge, filter capacitor, one-level inverter bridge, resonant inductance, every value electric capacity, high frequency transformer, high-frequency rectification bridge, LC filter circuit and secondary inverter bridge;
Wherein, described generating set is connected with described three-phase commutation bridge, for output AC electricity to described three-phase commutation bridge; The output of described three-phase commutation bridge is connected with described filter capacitor, for outputting to described filter capacitor by forming direct current after the three-phase alternating current electric rectification of input, the output of described filter capacitor is connected with described one-level inverter bridge, described one-level inverter bridge is outputted to after the direct current of reception is carried out filtering, the output of described one-level inverter bridge is connected with the former limit of described high frequency transformer, for the filtered DC inverter received being produced ac square wave and outputting to the former limit of described high frequency transformer; Secondary and the described high-frequency rectification bridging of described high frequency transformer connect, described high-frequency rectification bridge is outputted to after being boosted by the ac square wave of reception, the output of described high-frequency rectification bridge is connected with described LC filter circuit, for the ac square wave rectification after described boosting is formed direct current square wave, described LC filter circuit is connected with described secondary inverter bridge, direct current square wave filtering for receiving forms direct current, and described secondary inverter bridge produces different square waves after the direct current of reception is carried out inversion and outputs to output port;
Described resonant inductance and described every being worth on the circuit of capacitances in series between described one-level inverter bridge and the former limit of described high frequency transformer, each power device of described one-level inverter bridge is parallel with filter capacitor, described filter capacitor, resonant inductance and form resonant tank every being worth electric capacity, for controlling described one-level inverter bridge;
Described electromagnetics transmitter also comprises the auxiliary current source network in parallel with the lagging leg of described one-level inverter bridge, is turning on and off the voltage in process for regulating the lagging leg of described one-level inverter bridge.
2. electromagnetics transmitter according to claim 1, it is characterized in that, circuit between the output of described filter capacitor and the input of described one-level inverter bridge is also parallel with bleeder resistance, for when described filter capacitor quits work, and the electric energy that described filter capacitor two ends of releasing store.
3. electromagnetics transmitter according to claim 1, it is characterized in that, circuit between the secondary of described high frequency transformer and the input of described high-frequency rectification bridge is also parallel with resistance capaciting absorpting circuit, and described resistance capaciting absorpting circuit comprises the 3rd electric capacity and the second resistance that are connected in series.
4. electromagnetics transmitter according to claim 1, is characterized in that, the power device of described one-level inverter bridge adopts phase-shifting full-bridge control model, and the drive singal of the power device of described one-level inverter bridge is produced by TMS320F28335.
5. electromagnetics transmitter according to claim 1, is characterized in that, described one-level inverter bridge is H type inverter bridge.
6. electromagnetics transmitter according to claim 5, is characterized in that, described H type inverter bridge is 2 insulated gate bipolar transistor modules or an Intelligent Power Module.
7. electromagnetics transmitter according to claim 1, is characterized in that, described auxiliary current source networking comprises the first diode in parallel and the second diode, and the auxiliary induction of connecting with the circuit after described first diode and the second diodes in parallel; Described first diode is parallel with the first electric capacity, described second diode is parallel with the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339849.1U CN204906195U (en) | 2015-05-22 | 2015-05-22 | Electromagnetic emission machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339849.1U CN204906195U (en) | 2015-05-22 | 2015-05-22 | Electromagnetic emission machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204906195U true CN204906195U (en) | 2015-12-23 |
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ID=54928340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520339849.1U Expired - Fee Related CN204906195U (en) | 2015-05-22 | 2015-05-22 | Electromagnetic emission machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204906195U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253696A (en) * | 2016-08-25 | 2016-12-21 | 中国科学院地质与地球物理研究所 | A kind of electromagnetics transmitter |
| CN110649818A (en) * | 2019-09-26 | 2020-01-03 | 南京桐润新能源有限公司 | Vehicle-mounted power supply PWM control strategy based on multivariable control technology |
| CN111786568A (en) * | 2020-08-06 | 2020-10-16 | 石家庄通合电子科技股份有限公司 | Bidirectional power converter, circuit and system |
-
2015
- 2015-05-22 CN CN201520339849.1U patent/CN204906195U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253696A (en) * | 2016-08-25 | 2016-12-21 | 中国科学院地质与地球物理研究所 | A kind of electromagnetics transmitter |
| CN106253696B (en) * | 2016-08-25 | 2018-06-22 | 中国科学院地质与地球物理研究所 | A kind of electromagnetics transmitter |
| CN110649818A (en) * | 2019-09-26 | 2020-01-03 | 南京桐润新能源有限公司 | Vehicle-mounted power supply PWM control strategy based on multivariable control technology |
| CN111786568A (en) * | 2020-08-06 | 2020-10-16 | 石家庄通合电子科技股份有限公司 | Bidirectional power converter, circuit and system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20180522 |