Analog voltage output circuit and generator set controller
The analog voltage output circuit is directly used to directly use the analog voltage signal output from the controller, which simplifies the voltage regulation output circuit of the diesel generator set, solves the problems of complex circuits and high cost in the prior art, and realizes high reliability and low cost voltage control.
Patent Information
- Application Number
- CN202422216593.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The voltage regulation output circuit of existing diesel generator sets is complex and costly. The traditional method of isolation and digital-analog conversion through digital signals leads to increased accuracy error and circuit complexity.
The analog voltage output circuit is adopted, and the analog voltage signal output by the controller is directly used to convert voltage through the voltage isolation module and in-phase and in-phase and in-phase amplifiers, simplifying the circuit structure, avoiding analog-to-digital conversion and signal isolation circuits, and reducing costs.
It achieves simple structure and strong ease of use, avoids accuracy errors caused by analog-to-digital conversion, improves reliability, and reduces circuit costs.
Smart Images
Figure CN223182131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power supply. More specifically, the utility model relates to an analog voltage output circuit and a generator set controller. Background Art
[0002] In the daily management of a power supply system, due to different required powers, there are often situations where two or more generator sets operate in parallel. When operating in parallel, since the controller needs to adjust the real-time working state of the generator, it is necessary to control the input voltage of the voltage regulator plate to achieve the purpose of controlling the operation of the generator. Currently, the voltage regulation output circuit of diesel generator sets is generated by outputting a digital quantity signal by the generator set controller for isolation, digital-to-analog conversion, and amplification. This method has a complex circuit and a high cost. Summary of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model innovatively provides an analog voltage output circuit and a generator set controller, which have a simple structure and strong usability; directly use the analog voltage signal output by the controller for output, without digital-to-analog conversion, avoiding the precision error caused by digital-to-analog conversion, and having high reliability; compared with the traditional parallel voltage output circuit, the relevant circuit for signal isolation function is removed, further reducing the cost.
[0004] To achieve the above technical purpose, the first aspect of the utility model discloses an analog voltage output circuit, including a power supply module, a positive voltage conversion module, and a negative voltage conversion module.
[0005] The power supply module is used to supply power to the positive voltage conversion module and the negative voltage conversion module.
[0006] The positive voltage conversion module includes a voltage isolation module and a non-inverting amplifier. The input end of the voltage isolation module is connected to an analog input voltage signal, and the voltage isolation module is used to isolate the input voltage and the output voltage; the non-inverting input end of the non-inverting amplifier is connected to the output end of the voltage isolation module, the power supply end of the non-inverting amplifier is connected to the power supply module, and the non-inverting amplifier is used to amplify the input voltage by a preset multiple and output a positive voltage externally.
[0007] The negative voltage conversion module includes an inverting amplifier. The inverting input end of the inverting amplifier is connected to the output end of the non-inverting amplifier, the power supply end of the inverting amplifier is connected to the power supply module, and the inverting amplifier is used to invert and amplify the input voltage by a preset multiple and output a negative voltage externally.
[0008] Further, the power supply module includes an isolated power supply, a first filter capacitor, a second filter capacitor, and a third filter capacitor. The power supply input pin of the isolated power supply is connected to a DC power supply. Both ends of the first filter capacitor are respectively connected to the power supply input pin and the ground pin of the isolated power supply. Both ends of the second filter capacitor are respectively connected to the isolated positive output pin and the isolated ground pin of the isolated power supply. Both ends of the third filter capacitor are respectively connected to the isolated ground pin and the isolated negative output pin of the isolated power supply.
[0009] Further, the voltage isolation module includes a first amplifier, a first optocoupler, a second optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor. Both ends of the first resistor are respectively connected to the analog input voltage signal and the positive input terminal of the first amplifier. The first end of the second resistor, the first end of the second capacitor, and the output terminal of the first amplifier are interconnected. The second end of the second resistor is connected to the anode input terminal of the first optocoupler. The first end of the third resistor, the inverting input terminal of the first amplifier, the second end of the second capacitor, and the output terminal of the second optocoupler are interconnected. The second end of the third resistor is connected to digital ground. The positive power supply terminal of the first amplifier is connected to a DC power supply. The first end of the first capacitor is connected between the DC power supply and the positive power supply terminal of the first amplifier. The second end of the first capacitor is connected to digital ground. The negative power supply terminal of the first amplifier is connected to digital ground. The output power supply terminal of the first optocoupler is connected to the isolated positive output pin of the isolated power supply. The first end of the third capacitor is connected between the output power supply terminal of the first optocoupler and the isolated positive output pin of the isolated power supply. The second end of the third capacitor is connected to the isolated ground pin of the isolated power supply. The output power supply terminal of the second optocoupler is connected to a DC power supply. The first end of the fourth capacitor is connected between the output power supply terminal of the second optocoupler and the DC power supply. The second end of the fourth capacitor is connected to digital ground. The cathode input terminal of the first optocoupler is connected to the anode input terminal of the second optocoupler. The cathode input terminal of the second optocoupler is connected to digital ground. The output terminal of the first optocoupler serves as the output terminal of the voltage isolation module. The output terminal of the first optocoupler is connected to the first end of the fourth resistor. The second end of the fourth resistor is connected to the isolated ground pin of the isolated power supply. The first optocoupler and the second optocoupler have the same specifications. The third resistor and the fourth resistor have the same resistance value.
[0010] Further, the non-inverting amplifier includes a second amplifier, a fifth resistor, a sixth resistor, and a fifth capacitor. The non-inverting input terminal of the second amplifier is connected to the output terminal of the first optocoupler and the first end of the fourth resistor. The inverting input terminal of the second amplifier, the first end of the fifth resistor, and the first end of the sixth resistor are interconnected. The second end of the fifth resistor, the output terminal of the second amplifier, and the positive pole of the externally output power supply are interconnected. The second end of the sixth resistor is connected to the isolated ground pin of the isolated power supply. The negative power supply terminal of the second amplifier is connected to the isolated ground pin of the isolated power supply. The positive power supply terminal of the second amplifier is connected to the isolated positive output pin of the isolated power supply. The first end of the fifth capacitor is connected between the positive power supply terminal of the second amplifier and the isolated positive output pin of the isolated power supply. The second end of the fifth capacitor is connected to the isolated ground pin of the isolated power supply.
[0011] Further, the non-inverting amplifier further includes a first output protection module. The first output protection module includes a first inductor and a first transient voltage suppression diode. The first inductor is connected in series between the output terminal of the second amplifier and the positive pole of the externally output power supply. The second end of the fifth resistor is connected between the first inductor and the output terminal of the second amplifier. The first end of the first transient voltage suppression diode is connected between the first inductor and the positive pole of the externally output power supply. The second end of the first transient voltage suppression diode is connected to the isolated ground pin of the isolated power supply.
[0012] Further, the inverting amplifier includes a third amplifier, a seventh resistor, an eighth resistor, a sixth capacitor, and a seventh capacitor. The non-inverting input terminal of the third amplifier is connected to the isolated ground pin of the isolated power supply. The inverting input terminal of the third amplifier is connected to the output terminal of the second amplifier. The first ends of the seventh resistor and the eighth resistor are connected in series between the inverting input terminal of the third amplifier and the output terminal of the second amplifier. The second end of the eighth resistor, the output terminal of the third amplifier, and the negative pole of the externally output power supply are interconnected. The positive power supply terminal of the third amplifier is connected to the isolated positive output pin of the isolated power supply. The first end of the seventh capacitor is connected between the positive power supply terminal of the third amplifier and the isolated positive output pin of the isolated power supply. The second end of the seventh capacitor is connected to the isolated ground pin of the isolated power supply. The negative power supply terminal of the third amplifier is connected to the isolated negative output pin of the isolated power supply. The first end of the sixth capacitor is connected between the negative power supply terminal of the third amplifier and the isolated negative output pin of the isolated power supply. The second end of the sixth capacitor is connected to the isolated ground pin of the isolated power supply.
[0013] Further, the negative voltage conversion module further includes a second output protection module. The second output protection module includes a second inductor and a second transient voltage suppression diode. The second inductor is connected in series between the output terminal of the third amplifier and the negative pole of the externally output power supply. The second terminal of the eighth resistor is connected between the second inductor and the output terminal of the third amplifier. The first terminal of the second transient voltage suppression diode is connected between the second inductor and the negative pole of the externally output power supply. The second terminal of the second transient voltage suppression diode is connected to the isolated ground pin of the isolated power supply.
[0014] Further, the non-inverting amplifier amplifies the input voltage by a factor of 1.5.
[0015] Further, the inverting amplifier amplifies the input voltage by a factor of -1.
[0016] To achieve the above technical objectives, the second aspect of the present utility model discloses a generator set controller, which includes the analog voltage output circuit described in the first aspect.
[0017] The beneficial effects of the present utility model are as follows:
[0018] The analog voltage output circuit of the present utility model has a simple structure and strong usability; it directly uses the analog voltage signal output by the controller for output, without the need for analog-to-digital conversion, avoiding the precision error caused by analog-to-digital conversion, and has high reliability; compared with the traditional parallel machine voltage output circuit, the relevant circuits for signal isolation function are removed, further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is the circuit schematic diagram of the analog voltage output circuit of the embodiment of the present utility model.
[0020] In the figure,
[0021] 1. Power supply module; 2. Positive voltage conversion module; 21. Voltage isolation module; 22. Non-inverting amplifier; 3. Negative voltage conversion module. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following combines the specification drawings to give a detailed explanation and description of the analog voltage output circuit and the generator set controller provided by the present utility model.
[0023] This embodiment specifically discloses an analog voltage output circuit, as Figure 1 shown, including a power supply module 1, a positive voltage conversion module 2, and a negative voltage conversion module 3. The power supply module 1 is used to supply power to the positive voltage conversion module 2 and the negative voltage conversion module 3.
[0024] Optionally, the power supply module 1 includes an isolated power supply U1, a first filter capacitor C1, a second filter capacitor C2, and a third filter capacitor C3. The power supply input pin 1 of the isolated power supply U1 is connected to a DC power supply. In this embodiment, the DC power supply is 5V. The two ends of the first filter capacitor C1 are respectively connected to the power supply input pin 1 and the digital ground pin 2 of the isolated power supply U1. The first filter capacitor C1 plays a filtering role at the input end. The two ends of the second filter capacitor C2 are respectively connected to the isolated positive output pin 7 (ISO_+5V) and the isolated ground pin 6 (ISO_GND) of the isolated power supply U1. The second filter capacitor C2 plays a filtering role at the isolated positive output end. The two ends of the third filter capacitor C3 are respectively connected to the isolated ground pin 6 (ISO_GND) and the isolated negative output pin 5 (ISO_-5V) of the isolated power supply U1. The third filter capacitor C3 plays a filtering role at the isolated negative output end.
[0025] The positive voltage conversion module 2 includes a voltage isolation module 21 and a non-inverting amplifier 22. The input end of the voltage isolation module 21 is connected to an analog input voltage signal. In this embodiment, the analog input voltage signal is an analog voltage signal directly output by the controller, and the voltage value is 0 - 3.3V. The voltage isolation module 21 is used to isolate the input voltage and the output voltage. The non-inverting input end of the non-inverting amplifier 22 is connected to the output end of the voltage isolation module 21. The power supply end of the non-inverting amplifier 22 is connected to the power supply module 1. The non-inverting amplifier 22 is used to amplify the input voltage by a preset multiple and output a positive voltage externally.
[0026] Optionally, the voltage isolation module 21 includes a first amplifier U3, a first optocoupler U5, a second optocoupler U6, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C4, a second capacitor C5, a third capacitor C6, and a fourth capacitor C7. The two ends of the first resistor R1 are respectively connected to the analog input voltage signal 0 - 3.3V and the non-inverting input terminal (pin 3) of the first amplifier U3. The first end of the second resistor R2, the first end of the second capacitor C5, and the output terminal (pin 1) of the first amplifier U3 are interconnected. The second end of the second resistor R2 is connected to the anode input terminal (pin 1) of the first optocoupler U5. The first end of the third resistor R3, the inverting input terminal (pin 2) of the first amplifier U3, the second end of the second capacitor C5, and the output terminal (pin 3) of the second optocoupler U6 are interconnected. The second end of the third resistor R3 is connected to the digital ground (GND). The positive power supply terminal (pin 8) of the first amplifier U3 is connected to a DC power supply, and the DC power supply is 5V. The first end of the first capacitor C4 is connected between the DC power supply and the positive power supply terminal (pin 8) of the first amplifier U3. The second end of the first capacitor C4 is connected to the digital ground (GND). The negative power supply terminal (pin 4) of the first amplifier U3 is connected to the digital ground (GND). The output power supply terminal (pin 4) of the first optocoupler U5 is connected to the isolated positive output pin (ISO_ + 5V) of the isolation power supply U1. The first end of the third capacitor C6 is connected between the output power supply terminal (pin 4) of the first optocoupler U5 and the isolated positive output pin (ISO_ + 5V) of the isolation power supply U1. The second end of the third capacitor C6 is connected to the isolated ground pin (ISO_GND) of the isolation power supply U1. The output power supply terminal (pin 4) of the second optocoupler U6 is connected to a DC power supply, and the DC power supply is 5V. The first end of the fourth capacitor C7 is connected between the output power supply terminal (pin 4) of the second optocoupler U6 and the DC power supply. The second end of the fourth capacitor C7 is connected to the digital ground (GND). The cathode input terminal (pin 2) of the first optocoupler U5 is connected to the anode input terminal (pin 1) of the second optocoupler U6. The cathode input terminal (pin 2) of the second optocoupler U6 is connected to the digital ground (GND). The output terminal (pin 3) of the first optocoupler U5 serves as the output terminal of the voltage isolation module 21. The output terminal (pin 3) of the first optocoupler U5 is connected to the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the isolated ground pin (ISO_GND) of the isolation power supply U1. The first optocoupler U5 and the second optocoupler U6 have the same specifications, and the third resistor R3 and the fourth resistor R4 have the same resistance values.
[0027] This application uses the optocoupler principle for isolation, avoiding the use of digital - to - analog converters. It has the characteristics of simple structure and high reliability while achieving isolation protection. Compared with the traditional parallel - machine voltage output circuit, the relevant circuits for signal isolation function are removed, further reducing the circuit cost.
[0028] The non-inverting amplifier 22 includes a second amplifier U4, a fifth resistor R5, a sixth resistor R6, and a fifth capacitor C8. The non-inverting input terminal (pin 3) of the second amplifier U4 is connected to the output terminal (pin 3) of the first optocoupler U5 and the first end of the fourth resistor R4. The inverting input terminal (pin 2) of the second amplifier U4, the first end of the fifth resistor R5, and the first end of the sixth resistor R6 are interconnected. The second end of the fifth resistor R5, the output terminal (pin 1) of the second amplifier U4, and the external output power supply positive electrode Vout+ are interconnected. The second end of the sixth resistor R6 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The negative power supply terminal (pin 4) of the second amplifier U4 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The positive power supply terminal (pin 8) of the second amplifier U4 is connected to the isolated positive output pin (ISO_+5V) of the isolated power supply U1. The first end of the fifth capacitor C8 is connected between the positive power supply terminal (pin 8) of the second amplifier U4 and the isolated positive output pin (ISO_+5V) of the isolated power supply U1. The second end of the fifth capacitor C8 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1.
[0029] The non-inverting amplifier 22 further includes a first output protection module. The first output protection module includes a first inductor L1 and a first transient voltage suppression diode TVS1. The first inductor L1 is connected in series between the output terminal (pin 1) of the second amplifier U4 and the external output power supply positive electrode Vout+. The second end of the fifth resistor R5 is connected between the first inductor L1 and the output terminal (pin 1) of the second amplifier U4. The first end of the first transient voltage suppression diode TVS1 is connected between the first inductor L1 and the external output power supply positive electrode Vout+. The second end of the first transient voltage suppression diode TVS1 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The first output protection module is used to prevent large external voltages and high-frequency AC signals from interfering with the circuit.
[0030] The output terminals of the first optocoupler U5 and the second optocoupler U6 are in series. The current in the series circuit is the same. The input currents of the first optocoupler U5 and the second optocoupler U6 are of the same magnitude. Since the first optocoupler U5 and the second optocoupler U6 are devices of the same specification and have the same current transfer ratio, the output currents of the first optocoupler U5 and the second optocoupler U6 are also of the same magnitude. The current output by the second optocoupler U6 flows to the ground through the third resistor R3, and the current output by the first optocoupler U5 flows to the ground through the fourth resistor R4. The resistance values of the third resistor R3 and the fourth resistor R4 are the same. Therefore, the input voltages at the inverting input terminal of the first amplifier U3 and the non-inverting input terminal of the second amplifier U4 are the same. According to the virtual short at the input terminal of the amplifier, the voltages at the non-inverting input terminal and the inverting input terminal of the first amplifier U3 are the same. Therefore, the 0 - 3.3V analog input voltage signal is the same as the voltage at the non-inverting input terminal of the second amplifier U4, realizing the isolated output of the voltage.
[0031] The non-inverting amplifier 22 amplifies the input voltage by a factor of 1.5, that is, 0 - 4.95V.
[0032] The negative voltage conversion module 3 includes an inverting amplifier. The inverting input terminal of the inverting amplifier is connected to the output terminal of the non-inverting amplifier 22, and the power supply terminal of the inverting amplifier is connected to the power supply module 1. The inverting amplifier is used to invert and amplify the input voltage by a preset multiple and output a negative voltage externally.
[0033] Optionally, the inverting amplifier includes a third amplifier U2, a seventh resistor R7, an eighth resistor R8, a sixth capacitor C9, and a seventh capacitor C10. The non-inverting input terminal (pin 3) of the third amplifier U2 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The inverting input terminal (pin 2) of the third amplifier U2 is connected to the output terminal (pin 1) of the second amplifier U4. The first ends of the seventh resistor R7 and the eighth resistor R8 are connected in series between the inverting input terminal (pin 2) of the third amplifier U2 and the output terminal (pin 1) of the second amplifier U4. The second end of the eighth resistor R8, the output terminal (pin 1) of the third amplifier U2, and the negative output terminal Vout- of the external output power supply are connected to each other. The positive power supply terminal (pin 8) of the third amplifier U2 is connected to the isolated positive output pin (ISO_+5V) of the isolated power supply U1. The first end of the seventh capacitor C10 is connected between the positive power supply terminal (pin 8) of the third amplifier U2 and the isolated positive output pin (ISO_+5V) of the isolated power supply U1. The second end of the seventh capacitor C10 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The negative power supply terminal (pin 4) of the third amplifier U2 is connected to the isolated negative output pin (ISO_-5V) of the isolated power supply U1. The first end of the sixth capacitor C9 is connected between the negative power supply terminal (pin 4) of the third amplifier U2 and the isolated negative output pin (ISO_-5V) of the isolated power supply U1. The second end of the sixth capacitor C9 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1.
[0034] The negative voltage conversion module 3 further includes a second output protection module. The second output protection module includes a second inductor L2 and a second transient voltage suppression diode TVS2. The second inductor L2 is connected in series between the output terminal (pin 1) of the third amplifier U2 and the negative output terminal Vout- of the external output power supply. The second end of the eighth resistor R8 is connected between the second inductor L2 and the output terminal (pin 1) of the third amplifier U2. The first end of the second transient voltage suppression diode TVS2 is connected between the second inductor L2 and the negative output terminal Vout- of the external output power supply. The second end of the second transient voltage suppression diode TVS2 is connected to the isolated ground pin (ISO_GND) of the isolated power supply U1. The second output protection module is used to prevent large external voltages and high-frequency AC signals from interfering with the circuit.
[0035] The 0 - 4.95V analog voltage signal enters the inverting input terminal of the third amplifier U2 through the seventh resistor R7. The inverting amplifier amplifies the input voltage by a factor of -1, that is, 0 - (-4.95)V.
[0036] In this embodiment, the first amplifier U3, the second amplifier U4, and the third amplifier U2 are operational amplifiers with the same specifications.
[0037] When the analog voltage output circuit of the present application is in use, the input terminals of the voltage regulating board are respectively connected to the positive output power supply Vout+ and the negative output power supply Vout- for external output, and an adjustable voltage output of 0V - 9.9V can be achieved. The analog voltage signal directly output by the controller is used for output without analog-to-digital conversion, avoiding the accuracy error caused by analog-to-digital conversion. A voltage regulating board control method without digital quantity output is provided.
[0038] The present application also discloses a generator set controller, including the analog voltage output circuit described in the above embodiment. The analog voltage output circuit of the present application can be directly integrated on the original generator set controller.
[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0040] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0041] In the description of this specification, the description with reference to terms such as "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0042] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and simple improvements made to the substantial content of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A simulated voltage output circuit, characterized in that, It includes a power supply module, a positive voltage conversion module, and a negative voltage conversion module. The power supply module is used to supply power to the positive voltage conversion module and the negative voltage conversion module. The positive voltage conversion module includes a voltage isolation module and a non-inverting amplifier. The input end of the voltage isolation module is connected to an analog input voltage signal, and the voltage isolation module is used to isolate the input voltage and the output voltage. The non-inverting input end of the non-inverting amplifier is connected to the output end of the voltage isolation module, the power supply terminal of the non-inverting amplifier is connected to the power supply module, and the non-inverting amplifier is used to amplify the input voltage by a preset multiple and output a positive voltage externally. The negative voltage conversion module includes an inverting amplifier. The inverting input end of the inverting amplifier is connected to the output end of the non-inverting amplifier, the power supply terminal of the inverting amplifier is connected to the power supply module, and the inverting amplifier is used to invert and amplify the input voltage by a preset multiple and output a negative voltage externally.
2. The analog voltage output circuit according to claim 1, wherein The power supply module includes an isolated power supply, a first filter capacitor, a second filter capacitor, and a third filter capacitor. The power supply input pin of the isolated power supply is connected to a DC power supply. The two ends of the first filter capacitor are respectively connected to the power supply input pin and the ground pin of the isolated power supply. The two ends of the second filter capacitor are respectively connected to the isolated positive output pin and the isolated ground pin of the isolated power supply. The two ends of the third filter capacitor are respectively connected to the isolated ground pin and the isolated negative output pin of the isolated power supply.
3. The analog voltage output circuit according to claim 2, wherein The voltage isolation module includes a first amplifier, a first optocoupler, a second optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor. The two ends of the first resistor are respectively connected to the analog input voltage signal and the non-inverting input terminal of the first amplifier. The first end of the second resistor, the first end of the second capacitor and the output terminal of the first amplifier are interconnected. The second end of the second resistor is connected to the anode input terminal of the first optocoupler. The first end of the third resistor, the inverting input terminal of the first amplifier, the second end of the second capacitor and the output terminal of the second optocoupler are interconnected. The second end of the third resistor is connected to digital ground. The positive power supply terminal of the first amplifier is connected to a DC power supply. The first end of the first capacitor is connected between the DC power supply and the positive power supply terminal of the first amplifier. The second end of the first capacitor is connected to digital ground. The negative power supply terminal of the first amplifier is connected to digital ground. The output power supply terminal of the first optocoupler is connected to the isolated positive output pin of the isolated power supply. The first end of the third capacitor is connected between the output power supply terminal of the first optocoupler and the isolated positive output pin of the isolated power supply. The second end of the third capacitor is connected to the isolated ground pin of the isolated power supply. The output power supply terminal of the second optocoupler is connected to the DC power supply. The first end of the fourth capacitor is connected between the output power supply terminal of the second optocoupler and the DC power supply. The second end of the fourth capacitor is connected to digital ground. The cathode input terminal of the first optocoupler is connected to the anode input terminal of the second optocoupler. The cathode input terminal of the second optocoupler is connected to digital ground. The output terminal of the first optocoupler serves as the output terminal of the voltage isolation module. The output terminal of the first optocoupler is connected to the first end of the fourth resistor. The second end of the fourth resistor is connected to the isolated ground pin of the isolated power supply. The first optocoupler and the second optocoupler have the same specifications, and the third resistor and the fourth resistor have the same resistance value.
4. The analog voltage output circuit according to claim 3, wherein, The non-inverting amplifier includes a second amplifier, a fifth resistor, a sixth resistor and a fifth capacitor. The non-inverting input terminal of the second amplifier is connected to the output terminal of the first optocoupler and the first end of the fourth resistor. The inverting input terminal of the second amplifier, the first end of the fifth resistor and the first end of the sixth resistor are interconnected. The second end of the fifth resistor, the output terminal of the second amplifier and the external output power supply positive pole are interconnected. The second end of the sixth resistor is connected to the isolated ground pin of the isolated power supply. The negative power supply terminal of the second amplifier is connected to the isolated ground pin of the isolated power supply. The positive power supply terminal of the second amplifier is connected to the isolated positive output pin of the isolated power supply. The first end of the fifth capacitor is connected between the positive power supply terminal of the second amplifier and the isolated positive output pin of the isolated power supply. The second end of the fifth capacitor is connected to the isolated ground pin of the isolated power supply.
5. The analog voltage output circuit according to claim 4, wherein The non-inverting amplifier further includes a first output protection module. The first output protection module includes a first inductor and a first transient voltage suppression diode. The first inductor is connected in series between the output terminal of the second amplifier and the positive pole of the externally output power supply. The second terminal of the fifth resistor is connected between the first inductor and the output terminal of the second amplifier. The first terminal of the first transient voltage suppression diode is connected between the first inductor and the positive pole of the externally output power supply. The second terminal of the first transient voltage suppression diode is connected to the isolated ground pin of the isolated power supply.
6. The analog voltage output circuit according to claim 4, wherein The inverting amplifier includes a third amplifier, a seventh resistor, an eighth resistor, a sixth capacitor, and a seventh capacitor. The non-inverting input terminal of the third amplifier is connected to the isolated ground pin of the isolated power supply. The inverting input terminal of the third amplifier is connected to the output terminal of the second amplifier. The first terminals of the seventh resistor and the eighth resistor are connected in series between the inverting input terminal of the third amplifier and the output terminal of the second amplifier. The second terminal of the eighth resistor, the output terminal of the third amplifier, and the negative pole of the externally output power supply are connected to each other. The positive power supply terminal of the third amplifier is connected to the isolated positive output pin of the isolated power supply. The first terminal of the seventh capacitor is connected between the positive power supply terminal of the third amplifier and the isolated positive output pin of the isolated power supply. The second terminal of the seventh capacitor is connected to the isolated ground pin of the isolated power supply. The negative power supply terminal of the third amplifier is connected to the isolated negative output pin of the isolated power supply. The first terminal of the sixth capacitor is connected between the negative power supply terminal of the third amplifier and the isolated negative output pin of the isolated power supply. The second terminal of the sixth capacitor is connected to the isolated ground pin of the isolated power supply.
7. The analog voltage output circuit according to claim 6, wherein The negative voltage conversion module further includes a second output protection module. The second output protection module includes a second inductor and a second transient voltage suppression diode. The second inductor is connected in series between the output terminal of the third amplifier and the negative pole of the externally output power supply. The second terminal of the eighth resistor is connected between the second inductor and the output terminal of the third amplifier. The first terminal of the second transient voltage suppression diode is connected between the second inductor and the negative pole of the externally output power supply. The second terminal of the second transient voltage suppression diode is connected to the isolated ground pin of the isolated power supply.
8. The analog voltage output circuit according to any one of claims 1-7, characterized in that, The non-inverting amplifier amplifies the input voltage by a factor of 1.
5.
9. The analog voltage output circuit according to any one of claims 1-7, characterized in that, The inverting amplifier amplifies the input voltage by a factor of -1.
10. A generator set controller, characterized in that, An analog voltage output circuit according to any one of claims 1-9 is included.