Voltage compensation circuit, voltage compensation method and circuit system for voltage compensation

Abstract

The invention provides a voltage compensation circuit, a voltage compensation method and a circuit system capable of performing voltage compensation, the voltage of a monitored circuit is acquired, the actual output voltage of the monitored circuit is determined based on the acquired voltage, and the actual output voltage is compared with the preset voltage. When the voltage compensation condition is met, the voltage of the monitored circuit is compensated, so that when the output voltage of the monitored circuit is unstable, the corresponding required voltage can be provided, stable operation of the monitored circuit is ensured, functional defects caused by voltage shortage of the circuit are avoided, and the reliability of the circuit is improved.

Description

Technical Field

[0001] The present application relates to the field of voltage control, and in particular to a voltage compensation circuit, a voltage compensation method, and a circuit system capable of performing voltage compensation. Background Art

[0002] In many circuits, due to the loss of the circuit itself or the impact during operation, the voltage of some circuits may be unstable, which in turn affects the operation status of the circuit.

[0003] Due to the needs of components in the load circuit, the input voltage signal is divided by each module, which may cause the components of the subsequent modules to not work properly. Taking the solenoid valve as an example, in the solenoid valve circuit, the continuous operation of the solenoid valve will cause the coil temperature to be too high, the internal resistance to increase, and the original state of the action may change, posing certain safety hazards. Existing DC power supplies are generally storage energy. For example, the on-board power supply will gradually lose power during use, causing the voltage provided by the power supply to each module to be affected, and there is a risk that some modules will not work properly due to insufficient power supply.

[0004] In the prior art, there is a method of using a BOOST circuit to increase the voltage, which aims to solve the problem that the power supply device is seriously heated or even burned due to excessive power of the components in the BOOST circuit. However, it does not solve the problems of low power efficiency and energy waste.

[0005] Voltage addition is widely used in analog signal processing. It combines multiple analog signals to obtain the desired output. Among various power conversion methods, the adder composed of integrated operational amplifiers is also a good way to convert voltage and is often used in various fields. For example, in the sensor field, voltage addition can be used to combine information from multiple sensors to provide more comprehensive data; in power management circuits, voltage addition can be used to monitor and adjust the output of different power supplies to provide stable voltage and current. The wide application of voltage addition makes the analog voltage adder that can perform this operation an important part of the analog electronic design field.

[0006] There is also prior art that has disclosed a circuit structure that uses an analog circuit to improve current sampling accuracy, which includes a common-phase proportional voltage adder. However, the common-phase proportional voltage adder has the problem of mutual coupling of signal sources and may have problems such as inaccurate output voltage.

[0007] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0008] In view of this, the present application proposes a voltage compensation circuit, a voltage compensation method and a circuit system capable of performing voltage compensation, which collects the voltage of the monitored circuit, determines the actual output voltage of the monitored circuit based on the collected voltage, compares the actual output voltage with a preset voltage, and compensates the voltage of the monitored circuit when the voltage compensation conditions are met. Therefore, when the output voltage of the monitored circuit is unstable, the corresponding required voltage can be provided to ensure the stable operation of the monitored circuit, avoid functional defects caused by circuit voltage shortage, and improve the reliability of the circuit.

[0009] According to one aspect of the present application, a voltage compensation circuit is provided, characterized in that it includes:

[0010] A voltage acquisition module is used to collect the voltage of the monitored circuit;

[0011] A control module, used to determine the actual output voltage of the monitored circuit based on the collected voltage, and determine whether the voltage compensation condition is met by comparing the actual output voltage with a preset voltage;

[0012] The voltage compensation module is used to compensate the voltage of the monitored circuit so that the actual output voltage is consistent with the preset voltage.

[0013] Optionally, the preset voltage is a preset voltage range, and when the actual output voltage is not within the preset voltage range, it is determined that the voltage compensation condition is met;

[0014] and / or,

[0015] The monitored circuit is a driving circuit of a solenoid valve.

[0016] Optionally,

[0017] Collecting the voltage of the monitored circuit includes: collecting voltages of at least two parts of the monitored circuit;

[0018] The voltage compensation module includes an adder for superimposing the collected voltages of at least two parts to obtain the actual output voltage.

[0019] Optionally,

[0020] The adder is an inverting proportional adder.

[0021] Optionally,

[0022] The adder is an inverting proportional adder composed of an integrated operational amplifier.

[0023] Optionally,

[0024] The circuit also includes a current bootstrap module, and the input current of the voltage compensation module is provided by the output current of the voltage compensation module after being processed by the current bootstrap module.

[0025] Optionally,

[0026] The current bootstrap module comprises a current amplifier, which amplifies the output current of the voltage compensation module and provides the amplified output current to the voltage compensation module as an input current.

[0027] Optionally,

[0028] It also includes: a function detection module, which is used to detect whether the monitored circuit is in a working state after the circuit is powered on;

[0029] When it is detected that the monitored circuit is in working state, the voltage acquisition module starts to acquire the voltage of the monitored circuit, and / or, when it is detected that the monitored circuit is not in working state, the control module performs error reporting. According to another aspect of the present application, a circuit system capable of voltage compensation is provided, characterized in that it includes: the voltage compensation circuit and the monitored circuit as described above.

[0030] According to a voltage compensation circuit, a voltage compensation method and a circuit system capable of performing voltage compensation proposed in the present application, the voltage of the monitored circuit is collected, and the actual output voltage of the monitored circuit is determined based on the collected voltage. The actual output voltage is compared with a preset voltage, and the voltage of the monitored circuit is compensated when the voltage compensation condition is met. Therefore, when the output voltage of the monitored circuit is unstable, the corresponding required voltage can be provided to ensure the stable operation of the monitored circuit, avoid functional defects caused by circuit voltage shortage, and improve the reliability of the circuit.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A schematic diagram showing an embodiment of a circuit system capable of performing voltage compensation of the present application is shown;

[0034] Figure 2 A schematic diagram showing an embodiment of a voltage compensation circuit of the present application is shown;

[0035] Figure 3 Shows Figure 2A schematic diagram of an embodiment of a workflow;

[0036] Figure 4 A schematic diagram showing an embodiment of a voltage compensation method of the present application is shown;

[0037] Figure 5 A schematic diagram showing an embodiment of a voltage compensation method of the present application is shown. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] Figure 1 A schematic diagram of an embodiment of a circuit system capable of voltage compensation of the present application is shown. As shown in the figure, the circuit system includes a monitored circuit 1 and a voltage compensation circuit 2. The monitored circuit 1 can be a load circuit such as a drive circuit, a detection circuit, a control circuit, etc., which has voltage fluctuations and is easily affected. For example, it can be a drive circuit of a solenoid valve. The voltage compensation circuit 2 includes a voltage acquisition module 21, which is used to acquire the voltage of the monitored circuit; a control module 22, which is used to determine the actual output voltage of the monitored circuit based on the acquired voltage, and determine whether the voltage compensation condition is met by comparing the actual output voltage with the preset voltage; a voltage compensation module 23, which is used to compensate the voltage of the monitored circuit so that the actual output voltage is consistent with the preset voltage, thereby ensuring the stable operation of the circuit.

[0041] As an implementation, the preset voltage may be a preset voltage range. When the actual voltage is not within the preset voltage range, it is determined that the voltage compensation condition is satisfied. Since the voltage at which the end load can work normally may be a range, for example (U * +u1,U * +u2), as long as the voltage is within this range, the load can work normally. Therefore, the preset voltage used for comparison can also be a range, not limited to a single value. For example, the voltage range for a solenoid valve to work normally is 22-24V. When the voltage provided to the load is not within the preset voltage range, it will cause the load to work abnormally or be unstable or not work or even be damaged. In this case, voltage compensation is required to meet the voltage compensation conditions.

[0042] The actual output voltage may be the collected voltage or not. As an implementation method, when designing the circuit, each part often has a corresponding working voltage, which may be the same or different; and the output voltage that the circuit needs to provide to the end load must meet the working voltage of the load. In one implementation method, the output voltage may be the sum of at least two of the working voltages of each part. In view of this, the present application can collect the voltages of at least two parts of the monitored circuit, that is, collect the voltages of at least two parts of the monitored circuit, thereby simplifying the circuit, and when there may not be a required voltage in the circuit, the appropriate voltage module of the existing circuit can be collected in a targeted manner to perform voltage compensation. As a possible implementation, the voltages of at least two parts collected are superimposed by a voltage compensation module including an adder, for example, to obtain the actual output voltage; then the actual output voltage obtained after the superposition operation is compared with the preset voltage to determine whether the voltage compensation condition is met. As an example, the voltages of three parts of the monitored circuit required to achieve the target are collected, such as: U1, U2, U3, etc., and the voltages of the three parts collected are superimposed by an adder to obtain the output voltage U O , will U O The voltage is compared with a preset voltage or a preset voltage range to determine whether the voltage compensation condition is met. Optionally, the adder is an inverting proportional adder, which can avoid the problem of mutual coupling of signal sources existing in the same-phase proportional voltage adder, and better ensure the accuracy of the output voltage. As an implementation method, the adder is an inverting proportional adder composed of an integrated operational amplifier, which has low cost and good effect.

[0043] In addition, if the signal source provides more current, it will affect the voltage to be converted and affect the performance of the power supply. As an implementation method, the voltage compensation circuit 2 also includes a current bootstrap module (not shown), and the input current of the voltage compensation module 23 is provided by the output current of the voltage compensation module 23 after being processed by the current bootstrap module. Thus, the input current of the voltage compensation module 23 is provided by itself, that is, the output current passes through the bootstrap module to obtain the bootstrap current and serves as the input current of its own input loop, then the current that the signal source (for example, the voltages U1, U2, U3, etc. from the three parts of the monitored circuit) needs to provide to the circuit will be greatly reduced, which is equivalent to reducing the input current of the entire circuit, thereby increasing the input resistance of the circuit, and the output voltage obtained in this way is used to compensate for the voltage loss in the corresponding circuit, reduce the loss of the power supply to be changed without adding additional power supply, maintain the stability of the circuit, solve the problem of too low input resistance, improve the performance of the signal source, and improve the quality of the power supply. Optionally, the current bootstrap module includes a current amplifier, which amplifies the output current of the voltage compensation module and provides it to the voltage compensation module as the input current, thereby compensating for the voltage loss in the corresponding circuit.

[0044] Figure 2 A schematic diagram of an embodiment of a voltage compensation circuit of the present application is shown.

[0045] As shown in the figure, the voltage compensation module A1 includes, for example, an adder composed of an integrated operational amplifier to perform addition operations, and the current bootstrap module A2 includes, for example, a current bootstrap amplifier to provide a bootstrap current to the input loop. The voltages U1, U2, and U3 are input signal sources, collectively referred to as U in , the output voltage is U O The voltage compensation module A1 is controlled by the control module ( Figure 2 The control signal given by the voltage compensation module A1 is used to control the voltage compensation. The voltages U1, U2, and U3 at each end required to achieve the target are collected, and the collected voltages at each end are superimposed and calculated through the integrated operational amplifier of A1 to obtain the output voltage U O ; At the same time, the current bootstrap method is adopted so that the input current of the integrated operational amplifier of A1 is provided by the circuit itself.

[0046] Figure 3 Shows Figure 2 A schematic diagram of an embodiment of a workflow of .

[0047] As shown in the figure, in step S31, the working voltage required by the end load is first analyzed as a preset voltage, and the end load is, for example, a solenoid valve; in step S32, the voltages of multiple parts of the acquisition circuit (for example, the drive circuit of the solenoid valve), such as U1, U2, U3, etc., are input into the voltage compensation circuit; in step S33, the voltage compensation circuit performs voltage conversion through an adder as its voltage compensation module, and outputs voltage U0 in step S34.

[0048] As an implementation method, the voltage compensation circuit 2 may also include a function detection module for detecting whether the monitored circuit is in a working state after the circuit is powered on; when it is detected that the monitored circuit is in a working state, the voltage acquisition module starts to collect the voltage of the monitored circuit, and / or, when it is detected that the monitored circuit is not in a working state, the control module performs error processing.

[0049] Figure 4 A schematic diagram showing an embodiment of a voltage compensation method of the present application is shown.

[0050] Step S41, firstly, specifying the circuit preset voltage U4 and its operating fluctuation range (u1, u2);

[0051] Step S42, the circuit is powered. For example, the solenoid valve drive circuit controls the power supply of the circuit through a switch;

[0052] Step S43, after the circuit is powered, the state information is fed back to the control module through the detection circuit, and the control module determines the working state of the circuit, that is, whether the circuit is powered and whether it is in a working state, for example, whether the circuit is faulty according to whether normal voltage and current pass through;

[0053] Step S44-Step S45, when the circuit fails and is not in working state, the control module such as the electronic control unit ECU performs a corresponding response output (error report);

[0054] Step S46, when it is detected that the driving circuit is powered, it proves that this part is turned on and can work. The acquisition module acquires the voltage of the corresponding circuit to obtain the actual working voltage U, and compares it with the preset voltage through the control module, for example, to determine whether the actual working voltage is within the allowable fluctuation range of the preset voltage, that is, to determine whether △U=U-U1∈(u1,u2). When △U=U-U1∈(u1,u2), the compensation is completed.

[0055] Step S47, if the actual working voltage is different from the preset voltage, the control module controls the voltage compensation module to perform voltage compensation on the circuit. In this embodiment, when the voltage change [i.e., △U] exceeds the range (u1, u2), it is determined that the voltage loss is likely to affect the function, and then the control module issues a control instruction to compensate for the missing voltage through the voltage compensation module. Taking the solenoid valve as an example, the normal working voltage range of the solenoid valve is 22-24V. If the voltage fed back to the control module after the circuit has worked for a long time is 23V∈(22V, 24V), it is judged to be in normal working state; if the feedback voltage is It is believed that the solenoid valve function may be affected and voltage compensation can be performed.

[0056] Step S46 and step S47 are repeatedly performed to ensure stable operation of the circuit.

[0057] Figure 5 A schematic diagram of an embodiment of a voltage compensation method of the present application is shown. As shown in the figure:

[0058] Step S51, collecting the voltage of the monitored circuit;

[0059] Step S52, determining the actual output voltage of the monitored circuit based on the collected voltage, and determining whether the voltage compensation condition is met by comparing the actual output voltage with a preset voltage;

[0060] Step S53, compensating the voltage of the monitored circuit so that the actual output voltage is consistent with the preset voltage.

[0061] Since the processing and functions implemented by the method of this embodiment basically correspond to the aforementioned embodiments, principles and examples, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0062] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0063] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0065] It should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A voltage compensation circuit, characterized in that: include: A voltage acquisition module is used to collect the voltage of the monitored circuit; A control module, used to determine the actual output voltage of the monitored circuit based on the collected voltage, and determine whether the voltage compensation condition is met by comparing the actual output voltage with a preset voltage; The voltage compensation module is used to compensate the voltage of the monitored circuit so that the actual output voltage is consistent with the preset voltage.

2. The circuit according to claim 1, characterized in that: The preset voltage is a preset voltage range, and when the actual output voltage is not within the preset voltage range, it is determined that the voltage compensation condition is met; and / or, The monitored circuit is a driving circuit of a solenoid valve.

3. The circuit according to claim 1 or 2, characterized in that: Collecting the voltage of the monitored circuit includes: collecting voltages of at least two parts of the monitored circuit; The voltage compensation module includes an adder for superimposing the collected voltages of at least two parts to obtain the actual output voltage.

4. The circuit according to claim 3, characterized in that: The adder is an inverting proportional adder.

5. The circuit according to claim 4, characterized in that: The adder is an inverting proportional adder composed of an integrated operational amplifier.

6. The circuit according to any one of claims 1 to 3, characterized in that: The circuit also includes a current bootstrap module, and the input current of the voltage compensation module is provided by the output current of the voltage compensation module after being processed by the current bootstrap module.

7. The circuit according to claim 6, characterized in that: The current bootstrap module comprises a current amplifier, which amplifies the output current of the voltage compensation module and provides the amplified output current to the voltage compensation module as an input current.

8. The circuit according to claim 1, characterized in that Also includes: Function detection module, used to detect whether the monitored circuit is in working state after the circuit is powered on; When it is detected that the monitored circuit is in working state, the voltage acquisition module starts to acquire the voltage of the monitored circuit, and / or, when it is detected that the monitored circuit is not in working state, the control module performs error reporting processing.

9. A voltage compensation method, characterized in that: Collect the voltage of the monitored circuit; Determine the actual output voltage of the monitored circuit based on the collected voltage, and determine whether the voltage compensation condition is met by comparing the actual output voltage with the preset voltage; The voltage of the monitored circuit is compensated so that its actual output voltage is consistent with the preset voltage.

10. A circuit system capable of voltage compensation, characterized in that: include: The voltage compensation circuit and the monitored circuit as claimed in claim 1.

Images