CN112162587A - Novel voltage stabilizing circuit - Google Patents
Novel voltage stabilizing circuit Download PDFInfo
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- CN112162587A CN112162587A CN202010975027.8A CN202010975027A CN112162587A CN 112162587 A CN112162587 A CN 112162587A CN 202010975027 A CN202010975027 A CN 202010975027A CN 112162587 A CN112162587 A CN 112162587A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
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Abstract
The invention relates to a novel voltage stabilizing circuit which comprises a starting module, a control module coupled with the starting module, a switch module coupled with the control module, a sampling module respectively coupled with the control module and the switch module, a voltage transformation module coupled with the starting module and the switch module and a feedback module coupled with the voltage transformation module and the control module, wherein the input voltage range of the starting module is 4.3V-36V. The invention has the effects of expanding the voltage input range and stabilizing the output voltage.
Description
Technical Field
The invention relates to the technical field of voltage-stabilized power supply technology, in particular to a novel voltage stabilizing circuit.
Background
At present, as electronic equipment further deepens into the lives of people, people increasingly rely on reliable energy sources to provide power. Modern electronic devices can be considered a collection of basic subsystems that must require a regulated supply voltage to perform a desired function.
The input voltage range of the conventional voltage-stabilized power supply is small, and the conventional voltage-stabilized power supply cannot adapt to some outdoor extreme environments (such as low temperature) so as to influence the use of electronic equipment.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a novel voltage regulator circuit capable of expanding the voltage input range and stabilizing the output voltage.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a novel voltage stabilizing circuit, includes the start module, with the control module that the start module is coupled, with the switch module that the control module is coupled, respectively with the control module with the switch module sampling module that is coupled, be coupled in the vary voltage module of start module and switch module and be coupled in the feedback module of vary voltage module and control module, the input voltage scope of start module is 4.3V-36V.
By adopting the technical scheme, the starting module supplies power to the control module, so that the control module works normally; then the control module outputs a switching signal to the switching module to enable the switching module to work normally, and then the voltage transformation module is conducted and works normally and outputs the voltage after voltage transformation; then the control module outputs a sampling signal to the sampling module, compares the input current of the voltage transformation module acquired by the acquisition module with the sampling signal, and judges that the input current is too large to stop the control module when the sampling signal is smaller than the input current of the voltage transformation module; the voltage after the transformation is fed back to the control module through the feedback module, then the control module carries out feedback adjustment according to a feedback result, and the voltage after the transformation is filtered by the filtering module and then is output to the output terminal, and the input voltage range of the starting module is 4.3V-36V, so that the circuit can adapt to various input power supplies, and the application range of products based on the circuit is expanded.
The present invention in a preferred example may be further configured to: the starting module comprises a starting circuit and a first starting capacitor which is connected with the starting circuit in parallel and is coupled with the control module, the starting circuit comprises a first starting resistor, a starting voltage stabilizing diode of which the K end is coupled with the other end of the first starting resistor, and an NPN type starting triode of which the base electrode is coupled with the coupling point of the first starting resistor and the starting voltage stabilizing diode, and the A end of the starting voltage stabilizing diode is grounded; the emitter of the starting triode is coupled with the control module and is grounded through a second starting capacitor, and the collector of the starting triode is connected with the first starting resistor in parallel through a second starting resistor.
By adopting the technical scheme, the external voltage stimulates the start voltage stabilizing diode to enable the start voltage stabilizing diode to extinguish the arc of the voltage, then the triode is started to be conducted, and the emitter supplies power to the control module to enable the circuit to start working.
The present invention in a preferred example may be further configured to: the control module comprises a controller and a climbing rate control circuit coupled with the controller, the climbing rate control circuit comprises a climbing control capacitor coupled with the controller and a PNP climbing control triode, the base electrode of the PNP climbing control triode is coupled with the coupling point of the controller and the climbing control capacitor, the collector electrode of the climbing control triode is grounded, and the emitter electrode of the climbing control triode is coupled with the other pin of the controller.
By adopting the technical scheme, the voltage output by the controller is stored by the climbing control capacitor, and meanwhile, the other pin of the controller outputs a control signal, so that the climbing control triode is conducted; energy is stored through the ramp-up control capacitor C5 to reduce the ramp rate, thereby enabling the circuit to couple larger loads.
The present invention in a preferred example may be further configured to: the switch module comprises a field effect transistor, one end of the field effect transistor is coupled with the controller through a first switch resistor, the coupling point of the field effect transistor and the first switch resistor is coupled with a second switch resistor, and the other end of the second switch resistor is grounded; the other two ends of the field effect tube are respectively coupled with the sampling module and the voltage transformation module.
By adopting the technical scheme, after the control module works normally, the control module outputs a switching signal to the field effect transistor to switch on the field effect transistor, so that the voltage transformation module coupled to the field effect transistor is switched on, and normal voltage transformation work is realized.
The present invention in a preferred example may be further configured to: the sampling module comprises a first sampling resistor, a second sampling resistor and a third sampling resistor which are connected in series with one end of the first sampling resistor and are connected in parallel with each other, the second sampling resistor and the third sampling resistor are coupled with a coupling point of the first sampling resistor and are coupled with the field effect transistor, and the other ends of the second sampling resistor and the third sampling resistor which are connected in parallel are grounded; the other end of the first sampling resistor is coupled with the controller.
By adopting the technical scheme, after the voltage transformation module is switched on, the sampling module collects the current value between the S pole of the field effect transistor and the ground, the collected current value is compared with the sampling signal, and when the current value is greater than the sampling signal, the input current is judged to be overlarge, so that the controller is triggered to stop working, and the overcurrent protection of the controller is realized.
The present invention in a preferred example may be further configured to: the transformer module comprises a transformer, a primary side input end of the transformer is coupled with the starting module, a primary side output end of the transformer is coupled with the switch module, and a secondary side of the transformer is coupled with the filtering module.
By adopting the technical scheme, the input current is transformed by the transformer and then is filtered by the filtering module and then is output, so that the transformation function of wide-range input is completed.
The present invention in a preferred example may be further configured to: the filter module comprises an inductor, a first filter capacitor and a second filter capacitor, and the inductor is connected in series with the positive output end of the secondary side of the transformer; one end of the first filter capacitor is connected in parallel with a coupling point between the secondary side of the transformer and the inductor, and the other end of the first filter capacitor is connected in parallel with the other secondary side of the transformer; one end of the second filter capacitor is connected in parallel with the inductor, and the other end of the second filter capacitor is connected in parallel with the transformer.
The present invention in a preferred example may be further configured to: the feedback module comprises an optical coupler, the input end of the optical coupler is coupled with the coupling point of the transformer and the inductor through a resistor, the input end of the optical coupler is connected with the comparison module in parallel, one output end of the optical coupler is grounded, and the other output end of the optical coupler is coupled with the controller.
By adopting the technical scheme, after the voltage transformation module transforms the voltage, the optical coupler is conducted and outputs a feedback signal to the controller, so that the monitoring of the voltage transformation process is realized.
The present invention in a preferred example may be further configured to: the feedback module is connected with a comparison module in parallel, the comparison module comprises a first comparison resistor connected in parallel with a coupling point between the optical coupler and the filtering module, and the other end of the first comparison resistor is coupled with the other output end of the optical coupler; a coupling point between the first comparison resistor and the other output end of the optical coupler is connected with a comparison voltage stabilizing diode and a first comparison capacitor in parallel, the first comparison capacitor is connected with the comparison voltage stabilizing diode N3 in parallel, the first comparison capacitor is connected with a second comparison capacitor in parallel, the second comparison capacitor is coupled to the coupling point of the first comparison capacitor and the voltage stabilizing diode, and the other end of the second comparison capacitor is connected with the end A of the comparison voltage stabilizing diode in parallel; the coupling point of the first comparison capacitor and the second comparison capacitor is coupled with a comparison circuit, and the comparison circuit stabilizes the output voltage at a specified value.
By adopting the technical scheme, when the voltage is output, the comparison module compares the voltage, so that the output voltage is stabilized at a specified value.
The present invention in a preferred example may be further configured to: the protection module comprises a comparator, a base electrode, an NPN type triode and a relay, wherein the input end of the comparator is respectively coupled with the sampling module and the control module, the base electrode of the NPN type triode is coupled with the output end of the comparator, the relay is coupled with the collector electrode of the triode, and the normally closed contact of the relay is respectively coupled with the input terminal of the circuit.
By adopting the technical scheme, when the comparator detects that the sampling signal is smaller than the current value collected by the sampling module, the comparison signal is output to enable the triode to be conducted, so that the relay is triggered, and then the normally closed contact of the relay is disconnected to enable the circuit input to be disconnected, so that the circuit is protected.
1. By arranging the control module, the circuit can adapt to the input voltage range of 4.3V-36V, and the application range of the circuit is improved;
2. the feedback module is arranged, so that the input current can be monitored;
3. by providing the comparison module, the output voltage can be stabilized at a specified value.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a first embodiment of the present invention.
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a second embodiment of the present invention.
In the figure, 1, a starting module; 2. a control module; 21. a ramp rate control circuit; 3. a switch module; 4. a sampling module; 5. a voltage transformation module; 6. a filtering module; 7. a feedback module; 8. a comparison module; 81. a load capacitive start-up circuit; 9. and a protection module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a novel voltage stabilizing circuit disclosed by the present invention includes a starting module 1, a control module 2 coupled to the starting module 1, a switch module 3 coupled to the control module 2, a sampling module 4 coupled to the control module 2 and the switch module 3, a transforming module 5 coupled to the starting module 1 and the switch module 3, and a feedback module 7 coupled to the transforming module 5 and the control module 2, wherein an input voltage range of the starting module 1 is 4.3V to 36V, and the sampling module 4 is disposed between an output end of the switch module 3 and the control module 2; the transformer module 5 is configured as a transformer T1, a primary input terminal of the transformer T1 is coupled to the start module 1, a primary output terminal of the transformer T1 is coupled to the switch module 3, and a secondary side of the transformer T1 is coupled to the output terminals P5 and P3 via a filter module 6.
The starting module 1 supplies power to the control module 2 to enable the control module 2 to work normally; then the control module 2 outputs a switching signal to the switching module 3 and outputs a sampling signal to the sampling module 4, so that the switching module 3 works normally, and then the voltage transformation module 5 is switched on and works normally, and outputs a voltage after voltage transformation; the voltage after voltage transformation is fed back to the control module 2 through the feedback module 7, then the control module 2 carries out feedback adjustment according to a feedback result, and meanwhile, the voltage after voltage transformation is filtered by the filtering module 6 and then is output to the output terminal.
The filter module 6 includes an inductor L1 connected in series to the positive output terminal of the secondary side of the transformer T1 and the positive output terminal P5 of the circuit, a first filter capacitor C20 having one end connected in parallel to the coupling point between the secondary side of the transformer T1 and the inductor L1 and the other end connected in parallel to the coupling point between the other secondary side of the transformer T1 and the negative output terminal P3 of the circuit, and a second filter capacitor C21 having one end connected in parallel to the coupling point between the inductor L1 and the output terminal P5 of the circuit and the other end connected in parallel to the transformer T1 and the negative output terminal P3 of the circuit.
Referring to fig. 2, the start-up module 1 includes a first start-up capacitor C1 connected across the input terminals P1, P2, a start-up circuit connected in parallel with the input terminal P1, and a first connection resistor R19 connected in parallel with the start-up circuit and coupled to the CS pin of the control module 2, the coupling point of the first start-up capacitor C1 to the input terminal P2 being grounded; the control module 2 is coupled to the coupling point between the start-up circuit and the input terminal P1; the start-up circuit comprises a first start-up resistor R21 with one end coupled with the input terminal P1, a start-up zener diode VZ2 with a K end coupled with the other end of the first start-up resistor R21, and an NPN type start-up transistor VT2 with a base coupled with a coupling point of the first start-up resistor R21 and the start-up zener diode VZ2, wherein the A end of the start-up zener diode VZ2 is grounded, an emitter of the start-up transistor VT2 is coupled with a power supply pin VCC of the control module 2 and grounded through a second start-up capacitor C2, and a collector of the start-up transistor VT2 is connected with the first start-up resistor R21 in parallel through a second start-up resistor R22.
After the external voltage is input through the input terminals P1 and P2, the zener diode VZ2 is turned on to extinguish the voltage, and then the transistor VT2 is turned on to supply power to the control module 2 through the emitter.
The control module 2 comprises an asynchronous boost controller N1 of type LM5155, a UVLO/SYNC pin of the controller N1 is coupled to a coupling point between the start circuit and the input terminal P1 through a resistor R1, an RT pin of the controller N1 is grounded through a resistor R4, an SS pin of the controller N1 is coupled to the ramp rate control circuit 21, a GATE pin of the controller N1 is coupled to the switch module 3, a CS pin of the controller N1 is coupled to the sampling module 4, a COMP pin of the controller N1 is coupled to the feedback module 7, and the ramp rate control circuit 21 is connected in parallel to the COMP pin and the coupling point of the feedback module 7.
When the controller N1 is normally started, the GATE pin outputs a switching signal to the switch module 3, so that the switch module 3 normally operates, and the transformer module 5 can normally operate; then, the CS pin outputs a sampling signal to the sampling module 4, and compares a sampling value of the sampling module 4 with the sampling signal; when the sampled value is greater than the sampling signal, it is determined that the input current is too large, and the controller N1 is deactivated.
The ramp-up rate control circuit 21 comprises a ramp-up control capacitor C5 coupled to the SS pin, and a PNP-type ramp-up control transistor VT1 having a base coupled to a coupling point of the SS pin and the ramp-up control capacitor C5, wherein a collector of the ramp-up control transistor VT1 is grounded, and an emitter of the ramp-up control transistor VT1 is coupled to a COMP pin of the controller N1; the voltage output by the SS pin is stored by the climbing control capacitor C5, and meanwhile, the COMP pin outputs a control signal, so that the climbing control triode VT1 is conducted; energy is stored through the ramp-up control capacitor C5 to reduce the ramp rate, thereby enabling the circuit to couple larger loads.
The switch module 3 comprises an N-type field effect transistor Q1 with high frequency and capable of improving switching efficiency, a G pole of the field effect transistor Q1 is coupled with a GATE pin of the controller N1 through a first switch resistor R6, a coupling point of the G pole of the field effect transistor Q1 and the first switch resistor R6 is coupled with a second switch resistor R20, and the other end of the second switch resistor R20 is grounded; the S pole of the field effect transistor Q1 is coupled with the sampling module 4, and the D pole of the field effect transistor Q1 is coupled with the primary side output end of the transformer T1; the field effect transistor Q1 may be configured as a triode.
The sampling module 4 comprises a first sampling resistor R7, and a second sampling resistor R10 and a third sampling resistor R11 connected in series with one end of the first sampling resistor R7 and in parallel with each other, the second sampling resistor R10 and the third sampling resistor R11 are coupled to the coupling point of the first sampling resistor R7 and coupled to the D-pole of the fet Q1, and the other ends of the second sampling resistor R10 and the third sampling resistor R11 connected in parallel are grounded; the other end of the first sampling resistor R7 is coupled to the CS pin of the controller N1, and the coupling point of the first sampling resistor R7 and the CS pin is connected in parallel to a sampling capacitor C22, and the other end of the sampling capacitor C22 is grounded.
After the main side of the transformer T1 is turned on, the sampling module 4 collects the current value between the S pole of the fet Q1 and the ground, compares the collected current value with the sampling signal, and determines that the input current is too large when the current value is greater than the sampling signal, thereby triggering the CS pin to stop the controller N1, and implementing overcurrent protection for the controller N1.
Referring to fig. 2, feedback module 7 includes an optical coupler N2 having an input terminal coupled to a coupling point of transformer T1 and inductor L1 through a resistor R12, the input terminal of optical coupler N2 is connected in parallel to comparison module 8, and one output terminal of optical coupler N2 is grounded, and the other output terminal is coupled to a COMP pin of controller N1; when the secondary side of the transformer T1 transforms, the optocoupler N2 is turned on and outputs a feedback signal to the COMP pin.
Referring to fig. 2, the comparing module 8 includes a first comparing resistor R13 connected in parallel to a coupling point between the photo-coupler N2 and the resistor R12, and the other end of the first comparing resistor R13 is coupled to the other output end of the photo-coupler N2; a comparison zener diode N3 and a first comparison capacitor C8 are connected in parallel at a coupling point between the first comparison resistor R13 and the other output end of the optocoupler N2, the first comparison capacitor C8 is connected in parallel with the comparison zener diode N3, the first comparison capacitor C8 is connected in parallel with a second comparison capacitor C9, the second comparison capacitor C9 is coupled to a coupling point between the first comparison capacitor C8 and the zener diode N3, and the other end of the second comparison capacitor C9 is connected in parallel with an end a of the comparison zener diode N3; the comparison circuit is coupled to a coupling point of the first comparison capacitor C8 and the second comparison capacitor C9, and includes resistors R14 and R15 connected in parallel to each other and having one end coupled to a coupling point of the inductor L1 and the second filter capacitor C21, and resistors R16 and R17 connected in parallel to the resistors R14 and R15, respectively, the other end of the resistor R16 is coupled to a coupling point between the second comparison capacitor C9 and the comparison zener diode N3, and the other end of the resistor R17 is coupled to a coupling point between the resistor R16 and the second comparison capacitor C9.
The comparing module 8 further includes a load capacitive start circuit 81, and the load capacitive start circuit 81 includes a diode D6, a diode D8, a resistor R31, and a capacitor C21. The anode of the diode D6 is connected with the LED-pole of the optocoupler N2, the cathode of the diode D6 is respectively connected with the anode of the diode D8, one end of the resistor R31 and one end of the capacitor C21, the cathode of the diode D8 is connected with the other end of the resistor R31, the common end of the diode D8 and the resistor R31 is connected with + VO1, and the other end of the capacitor C21 is connected with-VO 1. The load capacitive start circuit 81 enables the load to start capacitively when the power module is loaded, and the load start voltage is smoother.
The current passes through a comparison voltage stabilizing diode N3, a resistor R14 and a resistor R16 in sequence, the voltage of R14 and R16 is compared with the output voltage, and the output voltage is subjected to voltage stabilizing processing, so that the output voltage is stabilized at a preset value, wherein when the voltage stabilizing processing is carried out, the input voltage and the output voltage meet the following formula:
VOUT =(1+R14/R16)*VREFin the present embodiment, VREFIs 2.5V, VOUTSet to 15V.
Example two
The difference from the first embodiment is that the protection module 9 is further included, referring to fig. 3 and 4, the protection module 9 includes a comparator N4, an NPN-type transistor Q4, and a relay KM1, an input terminal of the comparator N4 is coupled to the sampling module 4 and the CS pin of the controller N1, respectively, a base of the transistor Q4 is coupled to an output terminal of the comparator N4, a collector of the transistor is coupled to the relay KM1, and normally closed contacts KM1-1 and KM1-2 of the relay KM1 are coupled to input terminals P1-P2 of the circuit, respectively.
When the comparator N4 detects that the sampling signal is smaller than the current value collected by the sampling module 4, the comparator outputs the comparison signal to enable the triode Q4 to be conducted, so that the relay KM1 is triggered, and then the normally closed contacts KM1-1 and KM1-2 of the relay KM1 are disconnected to enable the circuit input to be disconnected, so that the circuit is protected
According to the invention, the control module N1 is arranged, so that the circuit can adapt to the input voltage range of 4.3V-36V, and the application range of the circuit is improved; the feedback module 7 is arranged, so that the input current can be monitored; by providing the comparison module 8, the output voltage can be stabilized at a predetermined value.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A novel voltage stabilizing circuit is characterized in that: the voltage-variable power supply comprises a starting module (1), a control module (2) coupled with the starting module (1), a switch module (3) coupled with the control module (2), a sampling module (4) respectively coupled with the control module (2) and the switch module (3), a voltage-variable module (5) coupled with the starting module (1) and the switch module (3) and a feedback module (7) coupled with the voltage-variable module (5) and the control module (2), wherein the input voltage range of the starting module (1) is 4.3-36V.
2. The novel voltage regulator circuit of claim 1, wherein: the starting module (1) comprises a starting circuit and a first starting capacitor which is connected with the starting circuit in parallel and is coupled with the control module (2), the starting circuit comprises a first starting resistor, a starting voltage stabilizing diode of which the K end is coupled with the other end of the first starting resistor, and an NPN type starting triode of which the base electrode is coupled with the coupling point of the first starting resistor and the starting voltage stabilizing diode, and the A end of the starting voltage stabilizing diode is grounded; the emitting electrode of the starting triode is coupled with the control module (2) and is grounded through a second starting capacitor, and the collecting electrode of the starting triode is connected with the first starting resistor in parallel through a second starting resistor.
3. The novel voltage regulator circuit of claim 1, wherein: the control module (2) comprises a controller and a climbing rate control circuit (21) coupled with the controller, wherein the climbing rate control circuit (21) comprises a climbing control capacitor coupled with the controller and a PNP climbing control triode with a base electrode coupled with a coupling point of the controller and the climbing control capacitor, the collector electrode of the climbing control triode is grounded, and the emitter electrode of the climbing control triode is coupled with the other pin of the controller.
4. The novel voltage regulator circuit of claim 3, wherein: the switch module (3) comprises a field effect transistor, one end of the field effect transistor is coupled with the controller through a first switch resistor, the coupling point of the field effect transistor and the first switch resistor is coupled with a second switch resistor, and the other end of the second switch resistor is grounded; the other two ends of the field effect tube are respectively coupled with the sampling module (4) and the transformation module (5).
5. The novel voltage regulator circuit of claim 1, wherein: the sampling module (4) comprises a first sampling resistor, a second sampling resistor and a third sampling resistor, the second sampling resistor and the third sampling resistor are connected in parallel, and the input ends of the second sampling resistor and the third sampling resistor are connected in series; the second sampling resistor and the third sampling resistor are coupled to the coupling point of the first sampling resistor and coupled to the switch module (3), and the other ends of the second sampling resistor and the third sampling resistor which are connected in parallel are grounded; the other end of the first sampling resistor is coupled with the controller.
6. The novel voltage regulator circuit of claim 3, wherein: the transformer module (5) comprises a transformer, the primary input end of the transformer is coupled with the starting module (1), the primary output end of the transformer is coupled with the switch module (3), and the secondary side of the transformer is coupled with the filter module (6).
7. The novel voltage regulator circuit of claim 6, wherein: the filter module (6) comprises an inductor, a first filter capacitor and a second filter capacitor, wherein the inductor is connected in series with the positive output end of the secondary side of the transformer; one end of the first filter capacitor is connected in parallel with a coupling point between the secondary side of the transformer and the inductor, and the other end of the first filter capacitor is connected in parallel with the other secondary side of the transformer; one end of the second filter capacitor is connected in parallel with the inductor, and the other end of the second filter capacitor is connected in parallel with the transformer.
8. The novel voltage regulator circuit of claim 7, wherein: the feedback module (7) comprises an optical coupler, the input end of the optical coupler is coupled with the coupling point of the transformer and the inductor through a resistor, the input end of the optical coupler is connected with the comparison module (8) in parallel, one output end of the optical coupler is grounded, and the other output end of the optical coupler is coupled with the controller.
9. The novel voltage regulator circuit of claim 8, wherein: the feedback module (7) is connected with a comparison module (8) in parallel, the comparison module (8) comprises a first comparison resistor connected in parallel with a coupling point between the optical coupler and the filtering module (6), and the other end of the first comparison resistor is coupled with the other output end of the optical coupler; a coupling point between the first comparison resistor and the other output end of the optical coupler is connected with a comparison voltage stabilizing diode and a first comparison capacitor in parallel, the first comparison capacitor is connected with the comparison voltage stabilizing diode N3 in parallel, the first comparison capacitor is connected with a second comparison capacitor in parallel, the second comparison capacitor is coupled to the coupling point of the first comparison capacitor and the voltage stabilizing diode, and the other end of the second comparison capacitor is connected with the end A of the comparison voltage stabilizing diode in parallel; the coupling point of the first comparison capacitor and the second comparison capacitor is coupled with a comparison circuit, and the comparison circuit stabilizes the output voltage at a specified value.
10. The novel voltage regulator circuit of claim 1, wherein: the circuit further comprises a protection module (9), wherein the protection module (9) comprises a comparator, a base electrode, an NPN type triode and a relay, the input end of the comparator is respectively coupled with the sampling module (4) and the control module (2), the base electrode of the triode is coupled with the output end of the comparator, the collector electrode of the triode is coupled with the relay, and the normally closed contact of the relay is respectively coupled with the input terminal of the circuit.
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| CN202010975027.8A CN112162587A (en) | 2020-09-16 | 2020-09-16 | Novel voltage stabilizing circuit |
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