CN212627670U - Isolated current-sharing circuit - Google Patents
Isolated current-sharing circuit Download PDFInfo
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- CN212627670U CN212627670U CN202021329795.8U CN202021329795U CN212627670U CN 212627670 U CN212627670 U CN 212627670U CN 202021329795 U CN202021329795 U CN 202021329795U CN 212627670 U CN212627670 U CN 212627670U
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Abstract
The utility model discloses an isolation current-sharing circuit, which comprises a rectangular oscillating circuit, an input sampling circuit, an inverting amplifying circuit, a signal tracker, a current-sharing bus, a current-sharing feedback loop, a chopper circuit, an isolation transformer, a rectifying circuit and an output voltage adjusting circuit, wherein the input sampling circuit, the inverting amplifying circuit, the signal tracker, the current-sharing bus, the current-sharing feedback loop, the chopper circuit, the isolation transformer, the rectifying circuit and; the output end of the rectangular oscillating circuit is connected with the chopper circuit, and the output end of the inverting amplifying circuit is connected with the current-sharing feedback loop; the utility model discloses good, the fault-tolerant ability of good, the fault-tolerant ability of reliability realizes the output and the redundant design of flow equalizing of power, has good market using value.
Description
Technical Field
The utility model relates to a power field especially relates to an keep apart circuit of flow equalizing.
Background
With the development of power supply technology, the power requirement on a power supply is higher and higher, the functional requirement is higher and higher, and for a high-power supply, due to the limitation of single power supply capacity, a multi-power supply parallel output scheme can be selected conventionally, or the reliability of a power supply system is improved, a power supply redundancy design can be selected, and a current sharing function can be used.
Many parallel power supplies require an output current sharing function. Because the converters are connected in parallel, it is difficult to achieve uniform output current distribution. Therefore, current sharing measures are required to be adopted among the parallel switch converter modules, and the method is the key for realizing a high-power supply and a redundant power supply. The current sharing method introduced by the invention can effectively solve the problem of non-current sharing of parallel operation of a plurality of power supplies.
The prior art has defects and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects existing in the prior art, the utility model provides an keep apart circuit of flow equalizing.
The utility model provides a technical scheme, an isolation flow equalizing circuit, which comprises a rectangular oscillating circuit, an input sampling circuit, an inverting amplifying circuit, a signal tracker, a flow equalizing bus, a flow equalizing feedback loop, a chopper circuit, an isolation transformer, a rectifying circuit and an output voltage adjusting circuit, wherein the input sampling circuit, the inverting amplifying circuit, the signal tracker, the flow equalizing bus, the flow equalizing feedback loop, the chopper circuit, the isolation transformer, the rectifying circuit and the output voltage adjusting circuit; the output end of the rectangular oscillating circuit is connected with the chopper circuit, and the output end of the inverting amplifying circuit is connected with the current-sharing feedback loop; the input sampling circuit is used for acquiring a negative voltage signal as a current sampling signal; the inverting amplifying circuit is used for inverting and amplifying the current sampling signal to form an inverting current amplifying signal; the current equalizing bus generates a parallel bus signal; the current-sharing feedback loop is used for carrying out operational amplification on the inverted current amplification signal and a parallel bus signal to form a linear voltage; the rectangular oscillating circuit is used for generating a rectangular square wave; the chopper circuit is used for comparing the rectangular square wave with the linear voltage to generate a rectangular wave; the isolation transformer transmits rectangular wave energy to the rectifying circuit; the rectification circuit is used for rectification; the output voltage adjusting circuit is used for adjusting output voltage according to the current output by the rectifying circuit.
Preferably, the input sampling circuit is composed of a resistor R24, one end of the resistor R24 is connected to an input voltage Vin, the other end is grounded, and the input end of the inverting amplifier circuit is connected to the input voltage Vin-.
Preferably, the inverting amplifying circuit comprises a capacitor C177, a capacitor C161, a resistor R34, a resistor R85, a resistor R173, a resistor R23, a resistor R177, a capacitor C165 and an operational amplifier U6-A, wherein an inverting input terminal of the operational amplifier U6-A is connected to the input voltage Vin-through a resistor R34, the input voltage Vin-is grounded through the capacitor C177, an inverting input terminal of the operational amplifier U6-A is connected to an output terminal of the operational amplifier U6-A through a resistor R173, a non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R85, a low potential terminal of the resistor R85 is grounded through the capacitor C161, a non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R23, a power supply terminal of the operational amplifier U6-A is connected to a 12V power supply, the grounding end of the operational amplifier U6-A is grounded, the 12V power supply is grounded through a capacitor C19, the output end of the operational amplifier U6-A is connected with the signal tracker through the resistor R177, and one end, close to the signal tracker, of the resistor R177 is grounded through the capacitor C165.
Preferably, the signal tracker is composed of an operational amplifier U13-B, an inverting input terminal of the operational amplifier U13-B is connected with an output terminal of the operational amplifier U6-A through the resistor R177, an input terminal of the operational amplifier U13-B is connected with an output terminal of the operational amplifier U13-B, and an inverting input terminal of the operational amplifier U13-B is connected with the current-sharing feedback loop through the resistor R203.
Preferably, the current-sharing bus comprises a resistor R42, a resistor R35 and a capacitor C29, the output end of the operational amplifier U13-B is connected with the port SHARE through the resistor R42, the low-potential end of the resistor R42 is grounded through a resistor R35, and the output end of the operational amplifier U13-B is grounded through the capacitor C29.
Preferably, the current-sharing feedback loop comprises a resistor R53, a resistor R21, a resistor R203, a resistor R44, a capacitor C98 and an operational amplifier U13-A, wherein a non-inverting input end of the operational amplifier U13-A is connected with an output end of the operational amplifier U13-B, an inverting input end of the operational amplifier U13-A is connected with a 12V power supply through the resistor R21, an inverting input end of the operational amplifier U13-A is connected with an output end of the operational amplifier U13-A through the resistor R44 and the capacitor C98 which are connected in series, a power supply end of the operational amplifier U13-A is connected with the 12V power supply, a grounding end of the operational amplifier U13-A is grounded, the 12V power supply is grounded through the capacitor C3, and an output end of the operational amplifier U13-A is connected with the chopper circuit.
Preferably, the rectangular oscillator circuit comprises a resistor R25, a resistor R27, a resistor R18, a capacitor C5, a diode D3, a resistor R32, a resistor R26 and an operational amplifier U6-B, wherein the non-inverting input terminal of the operational amplifier U6-B is connected with a 12V power supply through the resistor R25, the non-inverting input terminal of the operational amplifier U6-B is grounded through the resistor R27, the non-inverting input terminal of the operational amplifier U6-B is connected with the output terminal of the operational amplifier U6-B through the resistor R26, the inverting input terminal of the operational amplifier U6-B is connected with the 12V power supply through the resistor R18, the inverting input terminal of the operational amplifier U6-B is grounded through the capacitor C5, the non-inverting input terminal of the operational amplifier U6-B is connected with the output terminal of the operational amplifier U6-B through the diode D3, the resistor R32 is connected between the diode D3 and the output end of the operational amplifier U6-B, and the output end of the operational amplifier U6-B is connected with the chopper circuit.
Preferably, the chopper circuit comprises a resistor R36, a diode D5, a resistor R33, a resistor R37 and an operational amplifier U3-A, the non-inverting input terminal of the operational amplifier U3-A is connected with the output terminal of the operational amplifier U13-A through the resistor R33, and the non-inverting input terminal of the operational amplifier U3-A is connected with the output terminal of the operational amplifier U3-A through the resistor R37, the inverting input terminal of the operational amplifier U3-A is connected to the output terminal of the operational amplifier U6-B through the resistor R36 and the diode D5 connected in parallel, and the anode of the diode D5 is connected to the inverting input of the operational amplifier U3-a, the cathode of the diode D5 is connected with the output end of the operational amplifier U6-B, and the output end of the operational amplifier U3-A is connected with the input end of the isolation transformer.
Preferably, the isolation transformer comprises a capacitor C7, a transformer T2 and a resistor R38, a high potential end of a primary winding of the transformer T2 is connected with an output end of the operational amplifier U3-a through the capacitor C7, a low potential end of the transformer T2 is grounded, the resistor R38 is connected between two ends of a secondary winding of the transformer T2, and a secondary winding of the transformer T2 is connected with an input end of the rectifying circuit.
Preferably, the rectifier circuit comprises a diode D8, a resistor R39 and a capacitor C8, the anode of the diode D8 is connected to the high potential end of the secondary winding of the transformer T2, the cathode of the diode D8 is connected to one end of the resistor R39, and the other end of the resistor R39 is grounded through the capacitor C8.
Compared with the beneficial effects of the prior art, the utility model has the advantages that when the power supplies are output in parallel, the current-sharing output of the power supplies is realized, meanwhile, the redundant design of the power supplies is realized, and the reliability and fault-tolerant capability of the power supplies are improved; the utility model discloses good, the fault-tolerant ability of good, the fault-tolerant ability of reliability realizes the output and the redundant design of flow equalizing of power, has good market using value.
Drawings
Fig. 1 is a schematic structural diagram 1 of the present invention.
Detailed Description
It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, an isolated current-sharing circuit includes a rectangular oscillator circuit, and an input sampling circuit, an inverting amplifier circuit, a signal tracker, a current-sharing bus, a current-sharing feedback loop, a chopper circuit, an isolation transformer, a rectifier circuit, and an output voltage regulator circuit, which are connected in sequence; the output end of the rectangular oscillating circuit is connected with the chopper circuit, and the output end of the inverting amplifying circuit is connected with the current-sharing feedback loop; the input sampling circuit is used for acquiring a negative voltage signal as a current sampling signal; the inverting amplifying circuit is used for inverting and amplifying the current sampling signal to form an inverting current amplifying signal; the current equalizing bus generates a parallel bus signal; the current-sharing feedback loop is used for carrying out operational amplification on the inverted current amplification signal and a parallel bus signal to form a linear voltage; the rectangular oscillating circuit is used for generating a rectangular square wave; the chopper circuit is used for comparing the rectangular square wave with the linear voltage to generate a rectangular wave; the isolation transformer transmits rectangular wave energy to the rectifying circuit; the rectification circuit is used for rectification; the output voltage adjusting circuit is used for adjusting output voltage according to the current output by the rectifying circuit.
Preferably, the input sampling circuit is composed of a resistor R24, one end of the resistor R24 is connected to an input voltage Vin, the other end is grounded, and the input end of the inverting amplifier circuit is connected to the input voltage Vin-.
Preferably, the inverting amplifying circuit comprises a capacitor C177, a capacitor C161, a resistor R34, a resistor R85, a resistor R173, a resistor R23, a resistor R177, a capacitor C165 and an operational amplifier U6-A, wherein an inverting input terminal of the operational amplifier U6-A is connected to the input voltage Vin-through a resistor R34, the input voltage Vin-is grounded through the capacitor C177, an inverting input terminal of the operational amplifier U6-A is connected to an output terminal of the operational amplifier U6-A through a resistor R173, a non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R85, a low potential terminal of the resistor R85 is grounded through the capacitor C161, a non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R23, a power supply terminal of the operational amplifier U6-A is connected to a 12V power supply, the grounding end of the operational amplifier U6-A is grounded, the 12V power supply is grounded through a capacitor C19, the output end of the operational amplifier U6-A is connected with the signal tracker through the resistor R177, and one end, close to the signal tracker, of the resistor R177 is grounded through the capacitor C165.
Preferably, the signal tracker is composed of an operational amplifier U13-B, an inverting input terminal of the operational amplifier U13-B is connected with an output terminal of the operational amplifier U6-A through the resistor R177, an input terminal of the operational amplifier U13-B is connected with an output terminal of the operational amplifier U13-B, and an inverting input terminal of the operational amplifier U13-B is connected with the current-sharing feedback loop through the resistor R203.
Preferably, the current-sharing bus comprises a resistor R42, a resistor R35 and a capacitor C29, the output end of the operational amplifier U13-B is connected with the port SHARE through the resistor R42, the low-potential end of the resistor R42 is grounded through a resistor R35, and the output end of the operational amplifier U13-B is grounded through the capacitor C29.
Preferably, the current-sharing feedback loop comprises a resistor R53, a resistor R21, a resistor R203, a resistor R44, a capacitor C98 and an operational amplifier U13-A, wherein a non-inverting input end of the operational amplifier U13-A is connected with an output end of the operational amplifier U13-B, an inverting input end of the operational amplifier U13-A is connected with a 12V power supply through the resistor R21, an inverting input end of the operational amplifier U13-A is connected with an output end of the operational amplifier U13-A through the resistor R44 and the capacitor C98 which are connected in series, a power supply end of the operational amplifier U13-A is connected with the 12V power supply, a grounding end of the operational amplifier U13-A is grounded, the 12V power supply is grounded through the capacitor C3, and an output end of the operational amplifier U13-A is connected with the chopper circuit.
Preferably, the rectangular oscillator circuit comprises a resistor R25, a resistor R27, a resistor R18, a capacitor C5, a diode D3, a resistor R32, a resistor R26 and an operational amplifier U6-B, wherein the non-inverting input terminal of the operational amplifier U6-B is connected with a 12V power supply through the resistor R25, the non-inverting input terminal of the operational amplifier U6-B is grounded through the resistor R27, the non-inverting input terminal of the operational amplifier U6-B is connected with the output terminal of the operational amplifier U6-B through the resistor R26, the inverting input terminal of the operational amplifier U6-B is connected with the 12V power supply through the resistor R18, the inverting input terminal of the operational amplifier U6-B is grounded through the capacitor C5, the non-inverting input terminal of the operational amplifier U6-B is connected with the output terminal of the operational amplifier U6-B through the diode D3, the resistor R32 is connected between the diode D3 and the output end of the operational amplifier U6-B, and the output end of the operational amplifier U6-B is connected with the chopper circuit.
Preferably, the chopper circuit comprises a resistor R36, a diode D5, a resistor R33, a resistor R37 and an operational amplifier U3-A, the non-inverting input terminal of the operational amplifier U3-A is connected with the output terminal of the operational amplifier U13-A through the resistor R33, and the non-inverting input terminal of the operational amplifier U3-A is connected with the output terminal of the operational amplifier U3-A through the resistor R37, the inverting input terminal of the operational amplifier U3-A is connected to the output terminal of the operational amplifier U6-B through the resistor R36 and the diode D5 connected in parallel, and the anode of the diode D5 is connected to the inverting input of the operational amplifier U3-a, the cathode of the diode D5 is connected with the output end of the operational amplifier U6-B, and the output end of the operational amplifier U3-A is connected with the input end of the isolation transformer.
Preferably, the isolation transformer comprises a capacitor C7, a transformer T2 and a resistor R38, a high potential end of a primary winding of the transformer T2 is connected with an output end of the operational amplifier U3-a through the capacitor C7, a low potential end of the transformer T2 is grounded, the resistor R38 is connected between two ends of a secondary winding of the transformer T2, and a secondary winding of the transformer T2 is connected with an input end of the rectifying circuit.
Preferably, the rectifier circuit comprises a diode D8, a resistor R39 and a capacitor C8, the anode of the diode D8 is connected to the high potential end of the secondary winding of the transformer T2, the cathode of the diode D8 is connected to one end of the resistor R39, and the other end of the resistor R39 is grounded through the capacitor C8.
Further, the output voltage adjusting circuit comprises a resistor R58, a resistor R59, a capacitor C18, a resistor R19, a triode Q1 and a resistor R22, one end of the resistor R58 is connected to the other end of the resistor R39, the other end of the resistor R58 is grounded through a resistor R59, the other end of the resistor R58 is grounded through the capacitor C16, the other end of the resistor R58 is connected to the base of the triode Q1, the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected to the VCOMP port through the resistor R22.
The VCOMP port is connected with a driving switch, and the SHARE port is connected with a shutdown bus.
Further, the input sampling circuit generates a negative voltage signal as the current sampling signal by inputting a current through the resistor R24.
Furthermore, in the reflection amplifying circuit, the capacitor C177 and the capacitor C161 filter the current sampling signal, the resistor R34, the resistor R85, the resistor R173, the resistor R23 and the operational amplifier U6-a amplify the current sampling signal in reverse phase, the amplification factor is the resistance ratio of the resistor R173 to the resistor R34, and the resistor R177 and the capacitor C165 filter the RC, so that the interference of the current sampling signal is reduced.
Further, the rectangular oscillator circuit charges the C5 through a resistor R18, and generates a rectangular square wave with the frequency of 5KHZ and the duty ratio of 0.95 by comparing the level of the C5 with the level of the non-inverting input end of the operational amplifier U6-B.
Furthermore, the chopper circuit generates a rectangular wave with a frequency of 5KHZ and a duty ratio of 0-0.5 by comparing the output signal of the rectangular oscillator circuit with the current-sharing feedback output signal through an operational amplifier U3-A, wherein the duty ratio is in direct proportion to the output signal of the current-sharing feedback loop.
The primary and secondary of the isolation transformer are isolated and the chopper circuit energy is transferred to the secondary control circuit. The turn ratio of the transformer is 1: 1.
Further, the level of the rectifying circuit is proportional to the output voltage of the current equalizing loop.
Furthermore, the output voltage adjusting circuit adjusts the output voltage according to the input current, so that a current equalizing function is realized.
When two machines are connected in parallel, the signal of the share corresponding to the machine with high output voltage is high, the signal of the non-inverting input terminal of the operational amplifier U13-a is increased, so that the signal of the non-inverting input terminal of the operational amplifier U3-a is large, the changed signal is coupled through the capacitor C7 and the transformer T2, the dotted terminal of the secondary winding of the transformer T2 is high, the triode Q1 is turned on, the voltage of the VCOMP port is pulled low, so that the machine with high output voltage stops supplying power to the outside, and the power supply with low voltage supplies power to the outside.
It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An isolation current-sharing circuit is characterized by comprising a rectangular oscillating circuit, an input sampling circuit, an inverting amplifying circuit, a signal tracker, a current-sharing bus, a current-sharing feedback loop, a chopper circuit, an isolation transformer, a rectifying circuit and an output voltage adjusting circuit, wherein the input sampling circuit, the inverting amplifying circuit, the signal tracker, the current-sharing bus, the current-sharing feedback loop, the chopper circuit, the isolation transformer, the rectifying circuit and the output; the output end of the rectangular oscillating circuit is connected with the chopper circuit, and the output end of the inverting amplifying circuit is connected with the current-sharing feedback loop.
2. The isolated current sharing circuit of claim 1, wherein the input sampling circuit is formed by a resistor R24, one end of the resistor R24 is connected to the input voltage Vin-the other end is connected to ground, and the input end of the inverting amplifier circuit is connected to the input voltage Vin-.
3. The isolated current sharing circuit of claim 2, wherein the inverting amplifier circuit comprises a capacitor C177, a capacitor C161, a resistor R34, a resistor R85, a resistor R173, a resistor R23, a resistor R177, a capacitor C165 and an operational amplifier U6-A, the inverting input terminal of the operational amplifier U6-A is connected to the input voltage Vin-through a resistor R34, the input voltage Vin-is grounded through the capacitor C177, the inverting input terminal of the operational amplifier U6-A is connected to the output terminal of the operational amplifier U6-A through a resistor R173, the non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R85, the low potential terminal of the resistor R85 is grounded through the capacitor C161, the non-inverting input terminal of the operational amplifier U6-A is grounded through the resistor R23, the power supply of the operational amplifier U6-A is connected to the power supply of 12V, the grounding end of the operational amplifier U6-A is grounded, the 12V power supply is grounded through a capacitor C19, the output end of the operational amplifier U6-A is connected with the signal tracker through the resistor R177, and one end, close to the signal tracker, of the resistor R177 is grounded through the capacitor C165.
4. The isolated current sharing circuit of claim 3 wherein the signal tracker is composed of an operational amplifier U13-B, the inverting input of the operational amplifier U13-B is connected to the output of the operational amplifier U6-A through the resistor R177, the input of the operational amplifier U13-B is connected to the output of the operational amplifier U13-B, and the inverting input of the operational amplifier U13-B is connected to the current sharing feedback loop through the resistor R203.
5. The isolated current sharing circuit of claim 4, wherein the current sharing bus comprises a resistor R42, a resistor R35 and a capacitor C29, the output end of the operational amplifier U13-B is connected with a SHARE port through the resistor R42, the low potential end of the resistor R42 is grounded through a resistor R35, and the output end of the operational amplifier U13-B is grounded through the capacitor C29.
6. The isolated current sharing circuit of claim 5, wherein the current sharing feedback loop comprises a resistor R53, a resistor R21, a resistor R203, a resistor R44, a capacitor C98 and an operational amplifier U13-A, the non-inverting input terminal of the operational amplifier U13-A is connected with the output terminal of the operational amplifier U13-B, the inverting input terminal of the operational amplifier U13-A is connected to a 12V power supply through the resistor R21, and the inverting input terminal of the operational amplifier U13-A is connected to the output terminal of the operational amplifier U13-A through the resistor R44 and the capacitor C98 connected in series, the power supply end of the operational amplifier U13-A is connected with a 12V power supply, the grounding end of the operational amplifier U13-A is grounded, the 12V power supply is grounded through a capacitor C3, and the output end of the operational amplifier U13-A is connected with the chopper circuit.
7. The isolated current sharing circuit of claim 6 wherein the rectangular oscillator circuit comprises a resistor R25, a resistor R27, a resistor R18, a capacitor C5, a diode D3, a resistor R32, a resistor R26 and an operational amplifier U6-B, the non-inverting input terminal of the operational amplifier U6-B is connected to the 12V power supply through the resistor R25, the non-inverting input terminal of the operational amplifier U6-B is connected to the ground through the resistor R27, the non-inverting input terminal of the operational amplifier U6-B is connected to the output terminal of the operational amplifier U6-B through the resistor R26, the inverting input terminal of the operational amplifier U6-B is connected to the 12V power supply through the resistor R18, the inverting input terminal of the operational amplifier U6-B is connected to the ground through the capacitor C5, the non-inverting input terminal of the operational amplifier U6-B is connected to the output terminal of the operational amplifier U6-B through the diode D3, the resistor R32 is connected between the diode D3 and the output end of the operational amplifier U6-B, and the output end of the operational amplifier U6-B is connected with the chopper circuit.
8. The isolated current sharing circuit of claim 7, wherein the chopper circuit comprises a resistor R36, a diode D5, a resistor R33, a resistor R37 and an operational amplifier U3-A, the non-inverting input terminal of the operational amplifier U3-A is connected to the output terminal of the operational amplifier U13-A through the resistor R33, the non-inverting input terminal of the operational amplifier U3-A is connected to the output terminal of the operational amplifier U3-A through the resistor R37, the inverting input terminal of the operational amplifier U3-A is connected to the output terminal of the operational amplifier U6-B through the resistor R36 and the diode D5 which are connected in parallel, the anode of the diode D5 is connected to the inverting input terminal of the operational amplifier U3-A, the cathode of the diode D5 is connected to the output terminal of the operational amplifier U6-B, the output end of the operational amplifier U3-A is connected with the input end of the isolation transformer.
9. The isolated current sharing circuit as claimed in claim 8, wherein the isolation transformer comprises a capacitor C7, a transformer T2 and a resistor R38, the high potential terminal of the primary winding of the transformer T2 is connected to the output terminal of the operational amplifier U3-a through the capacitor C7, the low potential terminal of the transformer T2 is grounded, the resistor R38 is connected between the two terminals of the secondary winding of the transformer T2, and the secondary winding of the transformer T2 is connected to the input terminal of the rectifying circuit.
10. The isolated current sharing circuit of claim 9 wherein the rectifying circuit comprises a diode D8, a resistor R39 and a capacitor C8, the anode of the diode D8 is connected to the high potential terminal of the secondary winding of the transformer T2, the cathode of the diode D8 is connected to one terminal of the resistor R39, and the other terminal of the resistor R39 is connected to ground through the capacitor C8.
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|---|---|---|---|
| CN202021329795.8U CN212627670U (en) | 2020-07-07 | 2020-07-07 | Isolated current-sharing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021329795.8U CN212627670U (en) | 2020-07-07 | 2020-07-07 | Isolated current-sharing circuit |
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| CN212627670U true CN212627670U (en) | 2021-02-26 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |