CN210835771U - Circuit with linearly adjustable output voltage - Google Patents
Circuit with linearly adjustable output voltage Download PDFInfo
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- CN210835771U CN210835771U CN202020004070.5U CN202020004070U CN210835771U CN 210835771 U CN210835771 U CN 210835771U CN 202020004070 U CN202020004070 U CN 202020004070U CN 210835771 U CN210835771 U CN 210835771U
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Abstract
The utility model relates to a new energy power switching technical field, in particular to a circuit with linearly adjustable output voltage, which realizes the automatic linear adjustment of the output voltage and improves the accuracy of the output voltage adjustment, and the technical proposal is summarized as that the circuit comprises a control signal input end, a voltage output end, a control voltage sampling module, an output voltage sampling module and a feedback adjusting circuit module, wherein the control signal input end is connected with the control voltage sampling module, the feedback adjusting circuit module comprises a controllable voltage stabilizer, an optical coupler, a control chip, a DC-DC converter and a rectifier filter, the control voltage sampling module is connected with the controllable voltage stabilizer, the output voltage sampling module is connected with the controllable voltage stabilizer, the voltage output end is connected with the optical coupler, the control chip is connected with the optical coupler, the DC-DC converter is connected with the control chip, the rectifier filter is connected with the DC-DC converter, the output end of the rectifier filter is connected with the output voltage sampling module and is suitable for a circuit with linearly adjustable output voltage.
Description
Technical Field
The utility model relates to a new forms of energy trade electric technical field, concretely relates to but output voltage linear adjustment's circuit.
Background
In the field of new energy battery replacement cabinets, batteries need to be charged, the charging is generally in a constant current stage and a constant voltage stage according to the characteristics of the batteries, and the battery floating charging voltage needs to be set in the constant voltage power supplementing stage. The existing three-wheeled and two-wheeled electric vehicle market batteries are various, the intelligent battery changing cabinet charger is required to be suitable for various battery specifications (48V and 60V batteries), various lithium batteries (manganese series, ternary lithium and lithium iron) are made of various materials, the floating charging voltage of the battery changing cabinet charger is various in specification, the traditional optical coupler and TL431 control output voltage circuit cannot meet the requirement due to single setting parameter, and how to effectively improve and realize linear adjustment of the output voltage on the basis of the traditional circuit is a hot point and is also a difficulty.
In the prior art, a circuit for linearly regulating an output voltage, such as that provided in chinese patent publication No. CN104469220B, includes a power supply circuit and a feedback adjustment circuit connected between a power supply output terminal and a feedback control terminal of the power supply circuit; the feedback adjustment circuit includes: the voltage stabilizing circuit comprises an input end, an output end, a control end, an optical coupler, a first resistor, a fourth resistor, a fifth resistor, a voltage stabilizing reference device, a voltage stabilizing feedback circuit and a sixth resistor, wherein the input end is used for being connected with a power supply output end of a power supply circuit, the output end is used for being connected with a feedback control end of the power supply circuit, the control end is used for inputting an external control signal to a feedback adjusting circuit, the first resistor is connected between the input end and a primary side input end of the optical coupler, the fourth resistor, the fifth resistor, the voltage stabilizing reference device, the voltage stabilizing feedback circuit and the sixth resistor are; the reference input end of the voltage-stabilizing reference device is connected to the position between the fourth resistor and the fifth resistor in series, the anode is grounded, and the cathode is connected with the other end of the primary side of the optocoupler; and the secondary output end of the optical coupler is connected with the output end.
The prior art is through inserting a resistance at stabiliser reference input to at resistance one side access control signal, act on the stabiliser through sample voltage all the way, control the output voltage of stabiliser, and then adjust output voltage, the accuracy of adjusting like this is high inadequately, and the effect is good inadequately.
SUMMERY OF THE UTILITY MODEL
The utility model aims at improving on current linear regulation output voltage circuit, through handling and taking a sample opto-coupler feedback signal, with the control voltage sample common action controllable stabiliser, realized the automatic linear adjustment to output voltage, improved the accuracy of adjustment.
The utility model discloses a following technical scheme realizes above-mentioned purpose, but output voltage linear adjustment's circuit, including control signal input, voltage output, control voltage sampling module, output voltage sampling module and feedback adjustment circuit module, the control signal input is connected with control voltage sampling module, feedback adjustment circuit module includes controllable stabiliser and opto-coupler, the opto-coupler includes the emitting diode of luminous side and receives the light signal converter who surveys, control voltage sampling module is connected with the reference input of controllable stabiliser, output voltage sampling module is connected with the reference input of controllable stabiliser, voltage output end is connected with emitting diode's positive pole, and it is characterized in that: the feedback adjusting circuit module further comprises a control chip, a DC-DC converter and a rectifying filter, wherein the control chip is connected with the signal output end of the optical signal converter, the DC-DC converter is connected with the control chip, the rectifying filter is connected with the DC-DC converter, and the output end of the rectifying filter is connected with the output voltage sampling module.
Furthermore, in order to optimize the feedback adjusting circuit module, the feedback adjusting circuit module further comprises a first capacitor, a third resistor, a fourth resistor and a fifth resistor, one end of the first capacitor is connected with a reference input end of the controllable voltage stabilizer, the other end of the first capacitor is connected with one end of the third resistor, the other end of the third resistor is connected with one end of the fourth resistor, the other end of the third resistor is further connected with a cathode of the controllable voltage stabilizer, the other end of the fourth resistor is connected with a cathode of the light emitting diode, one end of the fifth resistor is connected with the cathode of the controllable voltage stabilizer, the other end of the fifth resistor is connected with a voltage output end, and an anode of the controllable voltage.
Furthermore, in order to adjust the sampling proportion of the control voltage, the control voltage sampling module comprises a first resistor and a second resistor, one end of the first resistor is connected with the input end of the control signal, the other end of the first resistor is connected with the reference input end of the controllable voltage stabilizer, the other end of the first resistor is also connected with one end of the second resistor, and the other end of the second resistor is grounded.
Furthermore, in order to adjust the sampling proportion of the output voltage, the output voltage sampling module comprises a resistor six and a resistor two, one end of the resistor six is connected with the output end of the rectifier filter, the other end of the resistor six is connected with the reference input end of the controllable voltage stabilizer, the other end of the resistor six is also connected with one end of the resistor two, and the other end of the resistor two is grounded.
Furthermore, in order to improve the processing capability of the control input signal, the circuit with the linearly adjustable output voltage further comprises an integrating circuit module and an impedance isolating module, wherein the integrating circuit module is connected with the control signal input end, the impedance isolating module is connected with the integrating circuit module, and the impedance isolating module is connected with the control voltage sampling module.
The beneficial effects of the utility model are that, through handling and taking a sample opto-coupler feedback signal, with the control voltage sample common action in controllable stabiliser, realized the automatic linear adjustment to output voltage, optimized the mode of output voltage adjustment, improved the accuracy of output voltage adjustment.
Drawings
Fig. 1 is a circuit structure diagram of the present invention.
Fig. 2 is a circuit structure diagram of the embodiment of the present invention.
In the figure, 1-control voltage sampling module, 2-output voltage sampling module, 3-feedback adjusting circuit module, 4-reference input end of controllable voltage stabilizer, 5-anode of controllable voltage stabilizer, 6-cathode of controllable voltage stabilizer, 7-cathode of light emitting diode, 8-anode of light emitting diode, 9-collector of optical signal converter, 10-emitter of optical signal converter, 11-integrating circuit module, 12-impedance isolation module, R1-resistor I, R2-resistor II, R3-resistor III, R4-resistor IV, R5-resistor V, R6-resistor VI, R7-resistor seven, U-operational amplifier, U1-controllable voltage stabilizer, PC 817-optical coupler, C1-capacitor I, and C2-capacitor II.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.
The circuit structure diagram of the output voltage linearly adjustable circuit of the utility model is shown in figure 2, and comprises a control signal input end, a voltage output end, a control voltage sampling module 1, an output voltage sampling module 2 and a feedback adjusting circuit module 3, wherein the control signal input end is connected with the control voltage sampling module 1, the feedback adjusting circuit module 3 comprises a controllable voltage stabilizer U1 and an optical coupler PC817, the optical coupler PC817 comprises a light emitting diode at the light emitting side and a light signal converter for receiving and measuring, the control voltage sampling module 1 is connected with a reference input end 4 of the controllable voltage stabilizer U1, the output voltage sampling module 2 is connected with the reference input end 4 of the controllable voltage stabilizer, the voltage output end is connected with an anode 8 of the light emitting diode, the feedback adjusting circuit module further comprises a control chip, a DC-DC converter and a rectifier filter, the control chip is connected with a collector 9 of a signal output end of the optical signal converter, the DC-DC converter is connected with the control chip, the rectifying filter is connected with the DC-DC converter, and the output end of the rectifying filter is connected with the output voltage sampling module 2.
The feedback adjustment circuit module further comprises a capacitor C1, a resistor three R3, a resistor four R4 and a resistor five R5, one end of the capacitor C1 is connected with a reference input end 4 of the controllable voltage stabilizer U1, the other end of the capacitor C1 is connected with one end of a resistor three R3, the other end of the resistor three R3 is connected with one end of the resistor four R4, the other end of the resistor three R3 is further connected with a cathode 6 of the controllable voltage stabilizer U1, the other end of the resistor four R4 is connected with a cathode 7 of the light emitting diode, one end of the resistor five R5 is connected with a cathode 6 of the controllable voltage stabilizer U1, the other end of the resistor five R5 is connected with a voltage output end, and an. The feedback regulation circuit is optimized.
The control voltage sampling module comprises a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected with the control signal input end, the other end of the first resistor R1 is connected with the reference input end 4 of the controllable voltage stabilizer U1, the other end of the first resistor R1 is also connected with one end of a second resistor R2, and the other end of the second resistor R2 is grounded. The voltage sampling proportion can be better adjusted and controlled.
The output voltage sampling module comprises a resistor six R6 and a resistor two R2, one end of the resistor six R6 is connected with the output end of the rectifier filter, the other end of the resistor six R6 is connected with the reference input end 4 of the controllable voltage stabilizer U1, the other end of the resistor six R6 is also connected with one end of a resistor two R2, and the other end of the resistor two R2 is grounded. The sampling proportion of the output voltage can be better adjusted.
The circuit with linearly adjustable output voltage further comprises an integrating circuit module 11 and an impedance isolating module 12, wherein the integrating circuit module 11 is connected with the input end of the control signal, the impedance isolating module 12 is connected with the integrating circuit module 11, and the impedance isolating module 12 is connected with the control voltage sampling module 1. The processing capability of the control input signal can be improved.
The circuit structure diagram of the output voltage linearly adjustable circuit of the present invention is shown in fig. 2, and includes a control signal input terminal, a voltage output terminal, an integrating circuit module 11, an impedance isolating module 12, a control voltage sampling module 1, an output voltage sampling module 2, and a feedback adjusting circuit module 3, wherein the integrating circuit module 11 includes a resistor seven R7 and a capacitor two C2, the impedance isolating module 12 includes an operational amplifier U, one end of the resistor seven R7 is connected to the control signal input terminal, the other end of the resistor seven R7 is connected to the equidirectional input terminal of the operational amplifier U, the other end of the resistor seven R7 is further connected to one end of the capacitor two C2, the other end of the capacitor two C2 is grounded, the reverse input terminal of the operational amplifier U is connected to the output terminal, the control voltage sampling module includes a resistor one R1 and a resistor two R2, the output terminal of the operational amplifier U is connected to one end of the resistor one R, the other end of the first resistor R1 is connected with the reference input end 4 of the controllable voltage stabilizer U1, the other end of the first resistor R1 is further connected with one end of the second resistor R2, the other end of the second resistor R2 is grounded, the output voltage sampling module 2 comprises a resistor six R6 and a resistor two R2, the feedback adjustment circuit module 3 comprises a controllable voltage stabilizer U1, a capacitor one C1, a resistor three R3, a resistor four R4, a resistor five R5, an optocoupler PC817, a control chip, a DC-DC converter and a rectifier filter, the optocoupler PC817 comprises a light emitting diode at a light emitting side and a converter for receiving photometric signals, one end of the resistor six R6 is connected with the output end of the rectifier filter, the other end of the resistor six R6 is connected with one end of the resistor two R2, the other end of the resistor six R6 is further connected with the reference input end 4 of the controllable voltage stabilizer U1, the anode 5 of the controllable voltage stabilizer U1 is grounded, and the cathode 6 is, the other end of the resistor five R5 is connected with a voltage output end, one end of a capacitor one C1 is connected with a reference input end 4 of a controllable voltage stabilizer U1, the other end of the capacitor one C1 is connected with one end of a resistor three R3, the other end of the resistor three R3 is connected with one end of a resistor four R4, the other end of the resistor four R4 is connected with a cathode 7 of a light emitting diode, an anode 8 of the light emitting diode is connected with the voltage output end, a collector 9 of an optical signal converter is connected with a control chip, an emitter 10 of the optical signal converter is grounded, the control chip is connected with a DC-DC converter, and the DC-DC.
The working principle of this embodiment is that the direct current voltage that the control input signal formed behind the integral, impedance isolation amplifier, through the control voltage module sample, the sampling of output voltage module is passed through after handling to the opto-coupler feedback signal among the feedback adjustment circuit, these two sampling voltages act on controllable stabiliser jointly, thereby change its impedance and change the luminous volume of opto-coupler luminescence side, and then change opto-coupler receiving side conduction degree, and then change control chip output drive pulse duty cycle, and then adjust DC-DC converter energy, and then change the output voltage parameter that the rectification filtering link formed. I.e. the parameters of the control input signal are changed, i.e. the output voltage is changed. Therefore, the sampling of the feedback signal and the sampling of the control voltage are added to act on the controllable voltage stabilizer together, so that the automatic linear adjustment of the output voltage is realized, the adjustment accuracy is improved, and a better effect is achieved.
The specific implementation mode is that a charging module of the battery changing cabinet needs to be matched with 48V and 60V manganese series lithium batteries or lithium iron batteries. The float voltage setting circuit has the following parameters that an input control signal is a PWM pulse signal, the frequency is 10KHZ, the amplitude is 3.3V, a resistor R1 adopts a resistor of 1.2K, and the precision is +/-1%; the resistor R2 adopts a resistor of 2.4K, and the precision is +/-1%; the resistor R3 adopts a resistor of 5.1K; the resistor R4 adopts a resistor of 1K; the resistor R5 adopts a resistor of 4.7K; the resistor R6 adopts a 33K resistor, and the precision is +/-1%; the resistor R7 adopts a resistor of 10K; the capacitance C1 adopts a capacitance of 100 nf; the capacitance C2 adopts a capacitance of 1 uf; the operational amplifier adopts LM 2904; the controllable voltage stabilizer adopts TL431 or AZ 431; the optocoupler adopts PC 817; the float voltage was 71.4V and the duty ratio D was set to 37.8% for a 48V manganese-based lithium battery, and 58.8V and 51.6% for a 60V manganese-based lithium battery.
Claims (5)
1. Output voltage linear adjustment's circuit, including control signal input, voltage output, control voltage sampling module, output voltage sampling module and feedback adjustment circuit module, the control signal input is connected with control voltage sampling module, feedback adjustment circuit module includes controllable stabiliser and opto-coupler, the opto-coupler includes the emitting diode of luminous side and receives the light signal converter of surveying, control voltage sampling module is connected with controllable stabiliser's reference input, output voltage sampling module is connected with controllable stabiliser's reference input, voltage output is connected its characterized in that with emitting diode's positive pole: the feedback adjusting circuit module further comprises a control chip, a DC-DC converter and a rectifying filter, wherein the control chip is connected with the signal output end of the optical signal converter, the DC-DC converter is connected with the control chip, the rectifying filter is connected with the DC-DC converter, and the output end of the rectifying filter is connected with the output voltage sampling module.
2. The circuit of claim 1, wherein: the feedback adjusting circuit module further comprises a first capacitor, a third resistor, a fourth resistor and a fifth resistor, one end of the first capacitor is connected with a reference input end of the controllable voltage stabilizer, the other end of the first capacitor is connected with one end of the third resistor, the other end of the third resistor is connected with one end of the fourth resistor, the other end of the third resistor is further connected with a cathode of the controllable voltage stabilizer, the other end of the fourth resistor is connected with a cathode of the light emitting diode, one end of the fifth resistor is connected with the cathode of the controllable voltage stabilizer, the other end of the fifth resistor is connected with a voltage output end, and an anode of the controllable voltage.
3. The circuit of claim 1, wherein: the control voltage sampling module comprises a first resistor and a second resistor, one end of the first resistor is connected with the control signal input end, the other end of the first resistor is connected with the reference input end of the controllable voltage stabilizer, the other end of the first resistor is further connected with one end of the second resistor, and the other end of the second resistor is grounded.
4. The circuit of claim 1, wherein: the output voltage sampling module comprises a resistor six and a resistor two, one end of the resistor six is connected with the output end of the rectifier filter, the other end of the resistor six is connected with the reference input end of the controllable voltage stabilizer, the other end of the resistor six is further connected with one end of the resistor two, and the other end of the resistor two is grounded.
5. The circuit of claim 1, wherein: the circuit comprises an integrating circuit module and an impedance isolation module, wherein the integrating circuit module is connected with a control signal input end, the impedance isolation module is connected with the integrating circuit module, and the impedance isolation module is connected with a control voltage sampling module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020004070.5U CN210835771U (en) | 2020-01-02 | 2020-01-02 | Circuit with linearly adjustable output voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020004070.5U CN210835771U (en) | 2020-01-02 | 2020-01-02 | Circuit with linearly adjustable output voltage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155260A1 (en) * | 2022-02-18 | 2023-08-24 | 长鑫存储技术有限公司 | Power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155260A1 (en) * | 2022-02-18 | 2023-08-24 | 长鑫存储技术有限公司 | Power supply circuit |
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