CN2430811Y - High frequency switch DC voltage-stablized source with multiway output - Google Patents
High frequency switch DC voltage-stablized source with multiway output Download PDFInfo
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- CN2430811Y CN2430811Y CN 00228534 CN00228534U CN2430811Y CN 2430811 Y CN2430811 Y CN 2430811Y CN 00228534 CN00228534 CN 00228534 CN 00228534 U CN00228534 U CN 00228534U CN 2430811 Y CN2430811 Y CN 2430811Y
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Abstract
The utility model discloses a high-frequency switch DC voltage-stabilized power source with multiway output. The utility model comprises a rectifying filter, a PWM pulse width controller, a DC/DC high-frequency transformer, a high-frequency transformer, an output rectifying filter and a working power supply. The DC/DC high-frequency transformer is composed of a power triode and field effect transistor connected in series. Through the technological improvement of a single-tube single-end positive excitation transducer, the disadvantages of an MOSFET power tube are overcome, the advantages of low cost and simple circuit of the high-frequency switch DC voltage-stabilized power source composed of the single-tube single-end positive excitation transducer are kept, the output power and the output way number are enlarged simultaneously, and the utility model is suitable for an environment of high input voltage. The utility model is added with an absorbing coil to balance the stability of the circuit.
Description
The utility model relates to a kind of supply unit, particularly a kind of many output loops of high input voltage high power HF switch D.C. regulated power supply.
It is simple that the MOSFET power tube has driving, the characteristics that the operating frequency high-output power is also bigger, and high-frequency switching power supply generally adopts it as power component.But because that the MOSFET pipe bears the overvoltage ability is poor, its range of application is restricted, especially to input voltage greater than 600V, power output is greater than the switching power supply of 1000W, the MOSFET power tube just can not finely meet the demands.Existing ways of addressing this issue generally is to adopt a plurality of power tubes to form the technical scheme that multichannel drives, thereby also just increases circuit complexity that cost has also improved.
The purpose of this utility model is to disclose a kind of can bearing than big input voltage, has multichannel output, the HF switch D.C. regulated power supply by single MOSFET power tube driving that power output is big.
The purpose of this utility model is achieved in that the HF switch D.C. regulated power supply with multichannel output, comprise the input rectifying filter, the PWM pulse width controller, the DC/DC high-frequency converter, high frequency transformer, the output rectifier filter, working power is characterized in that: described DC/DC high-frequency converter is in series by pliotron and field effect transistor.
The output rectifier filter is formed in parallel by the multichannel current rectifying and wave filtering circuit.
Between high frequency transformer and ground, be provided with the absorption circuit that diode and coil constitute.
Working power is in series by self-feed line circle and diode.
After being provided with resistance and diode be in parallel between power tube collector electrode in the DC/DC high-frequency converter and the ground again with the overvoltage crowbar of capacitances in series.
At high frequency transformer input coil two ends and the overvoltage absorption circuit of connecting and constituting with diode after being connected to by resistance and electric capacity parallel connection.
Be connected to diode (its anode connects transistor base, and negative electrode connects power line) between transistor base in the DC/DC high-frequency converter and the power line as loop of electric leakage.
The utility model is by carrying out technological improvement to the single tube single-ended forward converter, utilize the advantage of bipolar transistor to overcome the shortcoming of MOSFET power tube dexterously, the single tube single-ended forward converter can be worked well under high input voltage, high switching frequency environment, the stability of circuit that increased the absorbing coil balance.Simultaneously, accomplish input and exported the function of isolating fully.With low cost, the circuit characteristic of simple of HF switch D.C. regulated power supply that had both kept the single tube single-ended forward converter to constitute has strengthened its power output and output way again, makes it be used in the environment of high input voltage.
Fig. 1 is the utility model block diagram;
Fig. 2 is the utility model embodiment one circuit diagram;
Fig. 3 is the utility model embodiment two circuit diagrams.
With reference to the accompanying drawings embodiment is elaborated:
(with reference to Fig. 1) exchanges input through input rectifying filter output DC source, the DC/DC high-frequency converter is under the effect of PWM pulse width controller, direct current output changing into high-frequency alternating current with the input rectifying filter, give high frequency transformer, high frequency transformer feeds back to the PWM pulse width controller by the self-feed line circle on the one hand, makes its control DC/DC high-frequency converter, exports by secondary coil on the other hand, through exporting whole filter, output meets the requirements of direct current.
(with reference to Fig. 2,3) Fig. 2, Fig. 3 is two embodiment of the present utility model.Two embodiment differences are that the high frequency transformer among Fig. 2 has only an elementary input coil, 4 secondary output windings; High frequency transformer among Fig. 3 has 2 elementary input coils, and 8 secondary output windings have 4 road and 8 road output rectifier and filters respectively corresponding to the secondary output winding of varying number.Can increase by 2 primary coils again on the basis of embodiment two in order to increase power output, 8 secondary coils and 8 road output windings then can constitute 12 the tunnel.
Be that example is elaborated with embodiment one below, embodiment one circuit working process is as follows:
High-voltage DC power supply is through L1 filtering during the initial turn-on power supply, provide+starting resistor of 16V to UC3844 through starting resistance 8R4 step-down, 8C5 and 8C6 filtering, moment is through 8C1,8D1,8D2 clamping action and the pulse of opening of 8Q1 is provided, back 8C1 charging finishes and is in high-impedance state, and the conducting electric current of 8Q1 is provided to provide by 8R7,8D1,8D2; Power supply+Vs is to the elementary N1 charging of high frequency transformer simultaneously, because magnetic coupling interaction, self-feed line circle N2 produces coupled voltages, lead up to 8D4, by 8C5,8C6 filtering, provide the normal power supply voltage of UC3844 to reach the conducting electric current that 8Q1 is provided by 8R7,8D1,8D2, at this moment, starting resistance 8R4 is inoperative; The duty ratio of output control potential pulse under the error amplifier in the UC3844 sheet is regulated, by PWM latch and output stage, is regulated, the ON time of control 8Q2 by the Voltage Feedback control end that 8D5 arrives UC3844 in another road.Because 8Q1 and 8Q2 are connected in series, when the 8Q2 conducting, 8Q1 is open-minded, power supply V
sTo the elementary N1 charging of high frequency transformer, carry out power transfer by secondary coil N4-N7; When 8Q2 ended, coil N2 feedback voltage descended, and 8D4,8D5 end, and 8Q1 base stage B discharges by 8D3, and current potential descends, and 8Q1 also ends.Simultaneously, the electromagnetic energy that stores among the T1 discharges by N3,8D25, with power supply V
sStack, at this moment, the magnitude of voltage that the power tube of 8Q1 and 8Q2 combination bears is 2V
s, passing through starting resistance 8R4 more again to 8Q1 charging conducting, UC3844 opens 8Q2 again then, and high frequency transformer T1 charges again, and the cycle restarts.
For single-ended forward converter high frequency transformer by conducting to procedures of turn-off, if the energy that originally was stored in the high frequency transformer can not discharge when ending, can be easy to produce self-excitation and shake, destroy the balance of circuit and do not reach the technical indicator of requirement.Be provided with 8D25 and energy regeneration coil N3 for this reason, discharge the loop as energy, high frequency transformer by the time energy loose and release and accelerate 8Q1 and restart, thereby reach the purpose of consolidating voltage stabilizing.
The concrete connection of embodiment one circuit: inductance L 1, electric capacity 8C3-8C6, resistance 8R4 constitute the input rectifying filter circuit.Inductance L 1 is connected on the incoming line, electric capacity 8C4 is connected between inductance L 1 output and the ground wire, and the output of inductance L 1 connects resistance 8R4 on the one hand, connects resistance 8R1 and electric capacity 8C2 parallel circuits on the one hand, connect ground by electric capacity 8C3 on the one hand, on the one hand input of line circle N1.The collector electrode C of triode 8Q1 connects resistance 8R1, electric capacity 8C2 parallel circuits by diode 8D26, and connects power supply V by it
s, connect resistance 8R15 diode 8D6 parallel circuits by electric capacity 8C12, and connect ground, also direct on the other hand line circle N1-1, N1-2 by parallel circuits.Resistance 8R1, electric capacity 8C2, diode 8D26 constitute the overvoltage absorption circuit.Resistance 8R5, diode 8D6, capacitor C 12 constitute overvoltage crowbar.The base stage of triode 8Q1 is connected with the negative electrode of diode 8D4 by the anode that connects diode 8D3 again; Connect diode 8D1 and connect resistance 8R7 and electric capacity 8C1 parallel branch by connecting diode 8D2 negative electrode by diode 8D1.The other end of resistance 8R7, electric capacity 8C1 parallel branch also is connected with diode 8D4 negative electrode, resistance 8R4, diode 8D3 negative electrode etc. simultaneously.The emitter of triode 8Q1 connects the drain electrode of field effect transistor 8Q2.The grid of field effect transistor 8Q2 connects ground by resistance 8R9, connects 6 pin of IC1 by resistance 8R8; The source electrode of field effect transistor 8Q2 connects ground connects IC1, UC3844 by resistance 8R10 3 pin (ISEN pin) by resistance 8R6.Coil N3 and diode 8D25 constitute the absorption discharge loop, are serially connected with between coil N1 one end and the ground.
1 pin (COMP) of IC1UC3844 connects 2 pin (VFB) by the parallel branch of resistance 8R5, electric capacity 8C7; 2 pin (VFB) connect ground by resistance 8R11,8RR series arm, connect the negative electrode of diode 8D5 by resistance 8R13, and resistance 8R14 and electric capacity 8C10 are connected between the negative electrode and ground of diode 8D5; 3 pin (ISEN) connect ground by electric capacity 8C8, by the grid of resistance 8R10 continuous show effect pipe 8Q2; 4 pin (CT) connect ground by electric capacity 8C11, connect 8 pin (REF) by resistance 8R12,8R2 series arm, 5 pin (GND) connect ground, 6 pin (OUT) are by the drain electrode of resistance 8R8 continuous show effect pipe 8Q2,7 pin are supply pins, 8 pin (REF) connect 4 pin (CT) by resistance 8R2,8R12 series arm, connect ground by electric capacity 8C9.The anode of diode 8D4,8D5 links to each other, and common ends connects self-feed line circle N2, and self-feed line circle N2 works to provide working power and feedback voltage information.
Output rectifier and filter is made of multichannel output branch road, and it is the same that line structure is propped up on every road, one the tunnel being the example explanation wherein.Two outputs of secondary coil N4, wherein an end connects ground, one end connects the anode of diode 8D23, diode 8D24, electric capacity 8C3 are parallel between the negative electrode and ground of diode 8D23, diode 8D23,8D24, electric capacity 8C37 constitute filter rectifier, and 1 pin of the integrated IC5 of voltage stabilizing connects the negative electrode of diode 8D23, and 2 pin connect ground, the output of 3 pin is parallel with electric capacity 8C38,8C35 and constitutes filter circuit between 3 pin and ground.
Claims (7)
1. the HF switch D.C. regulated power supply that has multichannel output, comprise the input rectifying filter, the PWM pulse width controller, the DC/DC high-frequency converter, high frequency transformer, the output rectifier filter, working power is characterized in that: described DC/DC high-frequency converter is in series by pliotron and field effect transistor.
2. the HF switch D.C. regulated power supply with multichannel output according to claim 1 is characterized in that: be provided with the absorption circuit that diode and coil constitute between high frequency transformer and ground.
3. the HF switch D.C. regulated power supply with multichannel output according to claim 1 is characterized in that: after being provided with resistance and diode is in parallel between the power tube collector electrode in the DC/DC high-frequency converter and the ground again with the overvoltage crowbar of capacitances in series.
4. the HF switch D.C. regulated power supply with multichannel output according to claim 1 is characterized in that; At high frequency transformer input coil two ends and the overvoltage absorption circuit of connecting and constituting with diode after being connected to by resistance and electric capacity parallel connection.
5. the HF switch D.C. regulated power supply with multichannel output according to claim 1 is characterized in that; Be connected to diode (its anode connects transistor base, and negative electrode connects power line) between transistor base in the DC/DC high-frequency converter and the power line as loop of electric leakage.
6. the HF switch D.C. regulated power supply with multichannel output according to claim 1 is characterized in that: the output rectifier filter is formed in parallel by the multichannel current rectifying and wave filtering circuit.
7. the HF switch D.C. regulated power supply with multichannel output according to claim 1, it is characterized in that: working power is in series by self-feed line circle and diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228534 CN2430811Y (en) | 2000-06-17 | 2000-06-17 | High frequency switch DC voltage-stablized source with multiway output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00228534 CN2430811Y (en) | 2000-06-17 | 2000-06-17 | High frequency switch DC voltage-stablized source with multiway output |
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| Publication Number | Publication Date |
|---|---|
| CN2430811Y true CN2430811Y (en) | 2001-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00228534 Expired - Fee Related CN2430811Y (en) | 2000-06-17 | 2000-06-17 | High frequency switch DC voltage-stablized source with multiway output |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879287B (en) * | 2003-11-04 | 2011-04-13 | Nxp股份有限公司 | Forward converter |
| CN102098040A (en) * | 2010-12-24 | 2011-06-15 | 日银Imp微电子有限公司 | Single-ended high-voltage level switching circuit for bridge type driving circuit |
| CN102148600A (en) * | 2011-04-02 | 2011-08-10 | 无锡市南方电器制造有限公司 | Speed regulating and power controlling device of wire feed motor of CO2/MAG (metal active gas)/MIG (metal insert gas) arc welding machine |
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN108055027A (en) * | 2017-11-25 | 2018-05-18 | 海宁海微电子科技有限公司 | A kind of high-frequency switch circuit |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
-
2000
- 2000-06-17 CN CN 00228534 patent/CN2430811Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879287B (en) * | 2003-11-04 | 2011-04-13 | Nxp股份有限公司 | Forward converter |
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN102098040A (en) * | 2010-12-24 | 2011-06-15 | 日银Imp微电子有限公司 | Single-ended high-voltage level switching circuit for bridge type driving circuit |
| CN102098040B (en) * | 2010-12-24 | 2012-10-10 | 日银Imp微电子有限公司 | Single-ended high-voltage level switching circuit for bridge type driving circuit |
| CN102148600A (en) * | 2011-04-02 | 2011-08-10 | 无锡市南方电器制造有限公司 | Speed regulating and power controlling device of wire feed motor of CO2/MAG (metal active gas)/MIG (metal insert gas) arc welding machine |
| CN108055027A (en) * | 2017-11-25 | 2018-05-18 | 海宁海微电子科技有限公司 | A kind of high-frequency switch circuit |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |