CN207283404U - A kind of non-isolated RCC DC converters - Google Patents
A kind of non-isolated RCC DC converters Download PDFInfo
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- CN207283404U CN207283404U CN201721369054.0U CN201721369054U CN207283404U CN 207283404 U CN207283404 U CN 207283404U CN 201721369054 U CN201721369054 U CN 201721369054U CN 207283404 U CN207283404 U CN 207283404U
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Abstract
The utility model discloses a kind of non-isolated RCC DC converters; including sequentially connected input circuit, RCC circuits, controlling circuit of voltage regulation, current foldback circuit and output circuit; it is connected between input circuit and RCC circuits for preventing the magnetically saturated magnetic reset circuit of RCC circuits, input circuit is connected by start-up circuit with controlling circuit of voltage regulation；Controlling circuit of voltage regulation includes switching tube Q1 and voltage-stabiliser tube DZ1, and the cathode of voltage-stabiliser tube DZ1 connects with the base stage of switching tube Q1, the plus earth of voltage-stabiliser tube DZ1；RCC circuits include high frequency transformer TR, and high frequency transformer TR includes armature winding Np, auxiliary winding Nb and secondary windings Ns.The utility model wide input voltage range, have a wide range of application, be highly practical, service life length, output power from high frequency transformer TR storage energies limitation, load capacity is strong, and the output current of output circuit is continuous, output voltage stabilization, and circuit structure is compact, it is small, it is reliable and stable.
Description
Technical field
The utility model belongs to power electronics technical field, and in particular to a kind of non-isolated RCC DC converters.
Background technology
Electric vehicle portion in national economy is not very high, but it meets the energy conservation and environmental protection trend of country, greatly
Short distance traffic is facilitated greatly, therefore, as environmental consciousness gradually improves, new energy electric motor vehicle is because of pollution-free, low noise, energy consumption
Less, lightly, a series of features such as practicality, become green traffic instrument most with prospects.In new energy electric motor vehicle, due to
The safety and reliability of power module and electric car is closely related, and therefore, power module has in new energy electric motor vehicle to be lifted
The effect of sufficient weight, still, electric car have the stability and load capacity of supply voltage the requirement of higher.
RCC (Ringing Choke converter) is that a kind of self-excited oscillation pulse formed using blocking oscillator is become
Parallel operation, this kind of converter with its it is simple in structure, component number is few, cost is low the characteristics of and be widely used.But
Input circuit and output circuit are isolated by high frequency transformer in existing RCC converters, since high frequency transformer continues
Energy is provided to load so that output power is limited by high frequency transformer storage energy, causes output current discontinuous, output electricity
The problems such as ripple is big is embossed, while there are the deficiencies of component number is more, components' placement is not compact, volume is big, so that cannot
Meets the needs of power module in new energy electric motor vehicle.
Utility model content
The technical problem to be solved by the utility model is to for above-mentioned deficiency of the prior art, there is provided it is a kind of it is non-every
From formula RCC DC converters, its wide input voltage range, have a wide range of application, be highly practical, and service life length, output power is not
Being limited by high frequency transformer TR storage energies, load capacity is strong, and the output current of output circuit is continuous, output voltage stabilization,
Circuit structure is compact, small, reliable and stable.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of non-isolated RCC DC convertings
Device, it is characterised in that：Including sequentially connected input circuit, RCC circuits, controlling circuit of voltage regulation, current foldback circuit and output
Circuit, is connected with for preventing the magnetically saturated magnetic reset circuit of RCC circuits, input circuit leads between input circuit and RCC circuits
Start-up circuit is crossed to be connected with controlling circuit of voltage regulation；The controlling circuit of voltage regulation includes switching tube Q1 and voltage-stabiliser tube DZ1, the voltage stabilizing
The cathode of pipe DZ1 connects with the base stage of switching tube Q1, the plus earth of the voltage-stabiliser tube DZ1；The RCC circuits become including high frequency
Depressor TR, the high frequency transformer TR include armature winding Np, auxiliary winding Nb and secondary windings Ns, the armature winding Np's
Same Name of Ends connects with the output terminal of input circuit, and the different name end of the armature winding Np connects with the collector of switching tube Q1, institute
The Same Name of Ends for stating auxiliary winding Nb connects through capacitance C3 and resistance R4 with the base stage of switching tube Q1, the different name of the auxiliary winding Nb
Two-way is divided at end, and the emitter with switching tube Q1 connects all the way, and another way connects with the anode of diode D5；The diode D5's
Yin channel electrode resistance R5 connects with the collector of switching tube Q1；The Same Name of Ends ground connection of the secondary windings Ns, the secondary windings Ns
Different name end connect with the anode of diode D3, the cathode of diode D3 connects with the emitter of switching tube Q1.
A kind of above-mentioned non-isolated RCC DC converters, it is characterised in that：The input circuit include diode D1,
The anode of resistance R2 and capacitance C1, the diode D1 input Vi+ ends, the cathode of the diode D1 for the cathode of input circuit
Connect with one end of resistance R2, the other end of the resistance R2 is the output terminal of input circuit, and the anode of input circuit inputs Vi-
End ground connection, capacitance C1 are connected between the output terminal of input circuit and the anode input Vi- ends of input circuit.
A kind of above-mentioned non-isolated RCC DC converters, it is characterised in that：The start-up circuit includes resistance R3, institute
The one end for stating resistance R3 connects with the other end of the resistance R2, the other end of the resistance R3 and the base stage phase of switching tube Q1
Connect.
A kind of above-mentioned non-isolated RCC DC converters, it is characterised in that：The magnetic reset circuit include resistance R1,
Capacitance C2 and diode D2, the resistance R1 and capacitance C2 are connected in parallel, one end and institute after resistance R1 and capacitance the C2 parallel connections
The other end for stating resistance R2 connects, and the other end connects with the cathode of diode D2 after resistance R1 and capacitance the C2 parallel connections, described
Anode of the different name end of the collector of switching tube Q1 and the armature winding Np with the diode D2 connects.
A kind of above-mentioned non-isolated RCC DC converters, it is characterised in that：The current foldback circuit includes triode
Q2, resistance R6 and capacitance C5, the collector of the triode Q2 connect with the cathode of voltage-stabiliser tube DZ1, the base of the triode Q2
Two-way is divided in pole, connects all the way through resistance R6 with the emitter of Q1, and another way connects through capacitance C5 with the emitter of triode Q2.
A kind of above-mentioned non-isolated RCC DC converters, it is characterised in that：The output circuit includes filter capacitor
One end of C7, the filter capacitor C7 point three tunnels, the first via connect through resistance R9 with the emitter of Q1, the second tunnel and capacitance C5 and
The connecting pin of the emitter of triode Q2 connects.3rd tunnel exports Vo+ ends for the cathode of output circuit；The filter capacitor C7's
The other end divides two-way, is grounded all the way, and another way exports Vo- ends for the anode of output circuit.
The utility model has the following advantages compared with prior art：
1st, the wide input voltage range of the utility model, can be applied to other on-electric technical field of vehicle, application range
Extensively, it is highly practical.
2nd, the utility model prevents high frequency transformer by setting magnetic reset circuit to consume the remanent magnetism in high frequency transformer TR
TR energy is excessive and magnetic saturation occurs, and avoids producing high current on armature winding Np and burning out high frequency transformer TR, improves RCC and become
The service life of parallel operation.
3rd, the utility model is non-isolated RCC converters, and high frequency transformer TR is continuously output circuit and provides energy, makes
Output circuit output power from the limitation of high frequency transformer TR storage energies, load capacity is strong, and then output circuit
Output current is continuous, output voltage stabilization, and circuit structure is compact, small.
4. the utility model opens on-off switching tube Q1 in advance, overcurrent protection under overcurrent condition, by triode Q2
Effect is good, reliable and stable.
In conclusion the utility model wide input voltage range, have a wide range of application, is highly practical, service life length, output
For power from the limitation of high frequency transformer TR storage energies, load capacity is strong, and the output current of output circuit is continuous, output voltage
Stablize, circuit structure is compact, small, reliable and stable.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Description of reference numerals:
1-input circuit；2-start-up circuit；3-magnetic reset circuit；
4-RCC circuits；5-controlling circuit of voltage regulation；6-current foldback circuit；
7-output circuit.
Embodiment
A kind of non-isolated RCC DC converters as shown in Figure 1, including sequentially connected input circuit 1, RCC circuits
4th, controlling circuit of voltage regulation 5, current foldback circuit 6 and output circuit 7, are connected between input circuit 1 and RCC circuits 4 for preventing
The only magnetically saturated magnetic reset circuit 3 of RCC circuits 4, input circuit 1 are connected by start-up circuit 2 with controlling circuit of voltage regulation 5；Voltage stabilizing
Control circuit 5 includes switching tube Q1 and voltage-stabiliser tube DZ1, and the cathode of the voltage-stabiliser tube DZ1 connects with the base stage of switching tube Q1, described
The plus earth of voltage-stabiliser tube DZ1；RCC circuits 4 include high frequency transformer TR, the high frequency transformer TR include armature winding Np,
Auxiliary winding Nb and secondary windings Ns, the Same Name of Ends of the armature winding Np connect with the output terminal of input circuit 1, the primary
The different name end of winding Np connects with the collector of switching tube Q1, the Same Name of Ends of the auxiliary winding Nb through capacitance C3 and resistance R4 with
The base stage of switching tube Q1 connects, and two-way is divided at the different name end of the auxiliary winding Nb, and the emitter with switching tube Q1 connects all the way, separately
The anode with diode D5 connects all the way；The yin channel electrode resistance R5 of the diode D5 connects with the collector of switching tube Q1；Institute
The Same Name of Ends ground connection of secondary windings Ns is stated, the different name end of the secondary windings Ns connects with the anode of diode D3, diode D3
Cathode connect with the emitter of switching tube Q1.
It should be noted that the input direct voltage scope of input circuit 1 is 22V~80V, wide input voltage range can
Other non-electrical motor-car fields are applied to, use scope is wide, highly practical；By setting magnetic reset circuit 3 to consume high frequency transformation
Remanent magnetism in device TR, prevents that high frequency transformer TR energy is excessive and produces magnetic saturation, avoids producing high current on armature winding Np
And high frequency transformer TR is burnt out, improve the service life of RCC DC converters；The purpose that start-up circuit 2 is set is to flow
The electric current for crossing resistance R3 is added to the base stage of switching tube Q1, switching tube Q1 is entered magnifying state, so that non-isolated RCC is straight
Current converter starts；RCC circuits 4 are switched on or off by self-oscillation controlling switch pipe Q1's so that high frequency transformer TR is real
The transmission of existing energy, since the different name end of the secondary windings Ns connects with the anode of diode D3, the cathode of diode D3 and
The emitter of switching tube Q1 connects, so as to be connected to input circuit 1 and output circuit 7, RCC DC converters become non-isolated
RCC DC converters, high frequency transformer TR be continuously output circuit 7 provide energy, the output power of output circuit 7 is from height
The limitation of frequency power transformer TR storage energies, load capacity is strong, and the output current of output circuit 7 is continuous, output voltage stabilization,
Circuit structure is compact, small；Controlling circuit of voltage regulation 5 carries out the output voltage values in output circuit 7 by voltage-stabiliser tube DZ1 steady
Fixed, output voltage is reliable；Current foldback circuit 6 opens on-off switching tube Q1 in advance by triode Q2's, plays overcurrent protection
Effect；Output circuit 7 is connected with output voltage.When it is implemented, the high frequency transformer TR uses the height of model EE10
Frequency power transformer, the switching tube Q1 use the NPN type triode of model 13003, and the resistance value of the resistance R5 is 100 Ω, institute
The resistance value for stating resistance R4 is 300 Ω, and the capacitance of the capacitance C3 is 0.1uF, and the diode D5 is using model 1N4148's
Diode, the voltage-stabiliser tube DZ1 use the voltage-stabiliser tube of model 1N4744.
As shown in Figure 1, in the present embodiment, the input circuit 1 includes diode D1, resistance R2 and capacitance C1, described two
The anode of pole pipe D1 inputs Vi+ ends for the cathode of input circuit 1, and the cathode of the diode D1 connects with one end of resistance R2,
The other end of the resistance R2 is the output terminal of input circuit 1, and the anode input Vi- ends of input circuit 1 are grounded, capacitance C1 connections
Between the output terminal of input circuit 1 and the anode input Vi- ends of input circuit 1.The purpose that the diode D1 is set be for
Prevent input voltage reverse connection, the purpose that the resistance R2 is set be in order to limit the electric current of the output terminal of input circuit 1, it is described
The setting of capacitance C1 is to filter out the ripple in input direct voltage.When it is implemented, the diode D1 uses model
4007 diode, the resistance value of the resistance R2 is 100 Ω, and the capacitance of capacitance C1 is 10uF.
As shown in Figure 1, in the present embodiment, the start-up circuit 2 includes one end of resistance R3, the resistance R3 and the electricity
The other end of resistance R2 connects, and the other end of the resistance R3 connects with the base stage of switching tube Q1.When it is implemented, the resistance R3
Resistance value be 51k Ω.
As shown in Figure 1, in the present embodiment, magnetic reset circuit 3 includes resistance R1, capacitance C2 and diode D2, the resistance
R1 and capacitance C2 are connected in parallel, and one end connects with the other end of the resistance R2 after resistance R1 and capacitance the C2 parallel connections, described
The other end connects with the cathode of diode D2 after resistance R1 and capacitance C2 parallel connections, the collector of the switching tube Q1 and the primary
Anode of the different name end of winding Np with the diode D2 connects.When it is implemented, the resistance value of the resistance R1 is 27k Ω,
The capacitance of the capacitance C2 is 0.1uF, and the diode D2 uses the diode of model BAV21W.
As shown in Figure 1, in the present embodiment, the current foldback circuit 6 includes triode Q2, resistance R6 and capacitance C5, institute
The collector for stating triode Q2 connects with the cathode of voltage-stabiliser tube DZ1, and the base stage of the triode Q2 divides two-way, all the way through resistance R6
Connect with the emitter of Q1, another way connects through capacitance C5 with the emitter of triode Q2.When it is implemented, the triode Q2
Using the triode of model MMBT5551, the resistance value of the resistance R6 is that the resistance value of 1k Ω, the resistance R9 are 3 Ω, described
The capacitance of capacitance C5 is 0.1uF.
As shown in Figure 1, in the present embodiment, the output circuit 7 includes filter capacitor C7, one end of the filter capacitor C7
Divide three tunnels, the first via connects through resistance R9 with the emitter of Q1, the second tunnel and the connection of the emitter of capacitance C5 and triode Q2
End connects.3rd tunnel exports Vo+ ends for the cathode of output circuit 7；The other end of the filter capacitor C7 divides two-way, connects all the way
Ground, another way export Vo- ends for the anode of output circuit 7.When it is implemented, the capacitance of the filter capacitor C7 is 220uF, institute
Stablize output direct current 15V voltages in the both ends for stating filter capacitor C7.
When the utility model is used, 1 input direct voltage of input circuit, input direct voltage divides two-way, activated all the way
Circuit 2 provides base current for switching tube Q1 and causes switching tube Q1 to enter magnifying state, and another way is flowed through the armature winding Np
To the collector of switching tube Q1；Since switching tube Q1 enters magnifying state, auxiliary winding Nb is caused to produce induced electromotive force, and it is secondary
Level winding Ns produces induced electromotive force, since diode D3 is unilateal conduction, causes the secondary windings Ns to form conducting
Circuit, the secondary windings Ns store energy；The induced electromotive force of the armature winding Np provides high potential for triode Q2, then
Carried out by the base voltage of voltage-stabiliser tube DZ1 switch tubes Q1 clamped so that filter capacitor C7 both ends export DC voltage；Work as electricity
The rise of R9 both end voltages is hindered, resistance R6 provides base current, triode Q2 conductings for triode Q2, and resistance R4 is supplied to triode
A base current part of Q2 flows to capacitance C7, causes switching tube Q1 base currents not enough to maintain its open-minded, therefore switching tube Q1
Turn off in advance and protect the RCC DC converters；Induced electromotive force in the auxiliary winding Nb through capacitance C3, resistance R4 and is opened
The different name end of auxiliary winding Nb is flowed to again after closing pipe Q1 and forms closed circuit so that switching tube Q1 is turned on, the auxiliary winding
Induced electromotive force in Nb charges for capacitance C3, and with the increase of electric charge in capacitance C3, resistance R4 both end voltages reduce, until it is electric
When hindering the electric current deficiency maintenance switching tube Q1 conductings that R4 is provided, switching tube Q1 shut-offs, after switching tube Q1 is turned off, since high frequency becomes
The secondary windings Ns both end voltages of depressor TR cannot be mutated, and the secondary windings Ns produces inverse electromotive force, and diode D3 is turned on,
The secondary windings Ns provides output voltage after diode D3 so that stablizes output DC voltage in filter capacitor C7 both ends；Institute
State armature winding Np and produce reverse induction electromotive force, diode D2 conductings, while charge to capacitance C2, and resistance R1 and capacitance C2
It is connected in parallel, the electric charge of capacitance C2 is consumed on resistance R1, and remaining magnetic energy is consumed, and prevents the armature winding Np from producing magnetic
Saturation and be burned, the reverse induction electromotive force that the auxiliary winding Nb is produced through auxiliary winding Nb, diode D5, resistance R5,
Resistance R4 is gradually increasing capacitance C3 reverse chargings, the voltage at capacitance C3 both ends, and switching tube Q1 is turned on again, and switching tube Q1 is repeatedly
Turn-on and turn-off form self-oscillation, and cause filter capacitor C7 both ends to stablize output DC voltage.
The above, is only the preferred embodiment of the utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (6)
- A kind of 1. non-isolated RCC DC converters, it is characterised in that：Including sequentially connected input circuit (1), RCC circuits (4), controlling circuit of voltage regulation (5), current foldback circuit (6) and output circuit (7), between input circuit (1) and RCC circuits (4) It is connected with for preventing the magnetically saturated magnetic reset circuit (3) of RCC circuits (4), input circuit (1) is by start-up circuit (2) and surely Press control circuit (5) connection；The controlling circuit of voltage regulation (5) includes the cathode and switching tube Q1 of switching tube Q1 and voltage-stabiliser tube DZ1, the voltage-stabiliser tube DZ1 Base stage connect, the plus earth of the voltage-stabiliser tube DZ1；The RCC circuits (4) include high frequency transformer TR, and the high frequency becomes Depressor TR includes armature winding Np, auxiliary winding Nb and secondary windings Ns, the Same Name of Ends and input circuit of the armature winding Np (1) output terminal connects, and the different name end of the armature winding Np connects with the collector of switching tube Q1, the auxiliary winding Nb's Same Name of Ends connects through capacitance C3 and resistance R4 with the base stage of switching tube Q1, and two-way is divided at the different name end of the auxiliary winding Nb, all the way Connect with the emitter of switching tube Q1, another way connects with the anode of diode D5；The yin channel electrode resistance R5 of the diode D5 Connect with the collector of switching tube Q1；The Same Name of Ends ground connection of the secondary windings Ns, the different name end and two of the secondary windings Ns The anode of pole pipe D3 connects, and the cathode of diode D3 connects with the emitter of switching tube Q1.
- A kind of 2. non-isolated RCC DC converters described in accordance with the claim 1, it is characterised in that：The input circuit (1) Anode including diode D1, resistance R2 and capacitance C1, the diode D1 inputs Vi+ ends, institute for the cathode of input circuit (1) The cathode for stating diode D1 connects with one end of resistance R2, and the other end of the resistance R2 is the output terminal of input circuit (1), defeated Enter the anode input Vi- ends ground connection of circuit (1), capacitance C1 is connected to the output terminal of input circuit (1) and bearing for input circuit (1) Between the input Vi- ends of pole.
- A kind of 3. non-isolated RCC DC converters described in accordance with the claim 2, it is characterised in that：The start-up circuit (2) Including resistance R3, one end of the resistance R3 connects with the other end of the resistance R2, the other end and switch of the resistance R3 The base stage of pipe Q1 connects.
- A kind of 4. non-isolated RCC DC converters described in accordance with the claim 2, it is characterised in that：The magnetic reset circuit (3) resistance R1, capacitance C2 and diode D2 are included, the resistance R1 and capacitance C2 are connected in parallel, the resistance R1 and capacitance C2 One end connects with the other end of the resistance R2 after parallel connection, and the other end is with diode D2's after resistance R1 and capacitance the C2 parallel connections Cathode connects, the anode phase of the different name end of the collector of the switching tube Q1 and the armature winding Np with the diode D2 Connect.
- A kind of 5. non-isolated RCC DC converters described in accordance with the claim 1, it is characterised in that：The overcurrent protection electricity Road (6) includes triode Q2, resistance R6 and capacitance C5, the collector of the triode Q2 connect with the cathode of voltage-stabiliser tube DZ1, institute The base stage for stating triode Q2 divides two-way, connects all the way through resistance R6 with the emitter of Q1, another way is through capacitance C5 and triode Q2 Emitter connect.
- 6. according to a kind of non-isolated RCC DC converters described in claim 5, it is characterised in that：The output circuit (7) Including filter capacitor C7, three tunnels of one end point of the filter capacitor C7, the first via connects through resistance R9 with the emitter of Q1, and second Road connects with the connecting pin of capacitance C5 and the emitter of triode Q2, and the 3rd tunnel exports Vo+ ends for the cathode of output circuit (7)； The other end of the filter capacitor C7 divides two-way, is grounded all the way, and another way exports Vo- ends for the anode of output circuit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721369054.0U CN207283404U (en) | 2017-10-23 | 2017-10-23 | A kind of non-isolated RCC DC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721369054.0U CN207283404U (en) | 2017-10-23 | 2017-10-23 | A kind of non-isolated RCC DC converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207283404U true CN207283404U (en) | 2018-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721369054.0U Expired - Fee Related CN207283404U (en) | 2017-10-23 | 2017-10-23 | A kind of non-isolated RCC DC converters |
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| CN (1) | CN207283404U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030472A (en) * | 2019-12-26 | 2020-04-17 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
-
2017
- 2017-10-23 CN CN201721369054.0U patent/CN207283404U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030472A (en) * | 2019-12-26 | 2020-04-17 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
| CN111030472B (en) * | 2019-12-26 | 2023-04-14 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
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| CF01 | Termination of patent right due to non-payment of annual fee |