CN114264874B - Auxiliary device of power analyzer - Google Patents
Auxiliary device of power analyzer Download PDFInfo
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- CN114264874B CN114264874B CN202111437459.4A CN202111437459A CN114264874B CN 114264874 B CN114264874 B CN 114264874B CN 202111437459 A CN202111437459 A CN 202111437459A CN 114264874 B CN114264874 B CN 114264874B
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Abstract
The application provides an auxiliary device of a power analyzer, which comprises a first transformer, a second transformer and a controller, wherein the controller is used for performing first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when a load is in a working state, and performing second closed-loop control on a second actual current according to the first reference current when the load is in the working state, and the control period of the first closed-loop control is smaller than that of the second closed-loop control. The auxiliary device of the power analyzer has the advantages that the control period of the first closed-loop control is smaller than that of the second closed-loop control, namely, a plurality of first closed-loop controls can be operated in one control period of the second closed-loop control, so that the control of the data refreshing frequency of the power analyzer is realized, the data refreshing frequency of the power analyzer is not too fast, the data of the power analyzer is ensured to be convenient to observe, and the judgment and the recording of engineers are facilitated.
Description
Technical Field
The application relates to the field of power testing, in particular to an auxiliary device of a power analyzer.
Background
The power consumption of the whole machine of the consumer electronic equipment is one of important indexes of hardware research and development, a power electronic analyzer is generally connected in series to a power supply input end of the whole machine, each module in the whole machine is operated in a maximum power consumption mode, and real-time power consumption is displayed through the power electronic analyzer, or the maximum power consumption is locked through a max hold (maximum locking function). For radio frequency products, the distance between a load and a client or a base station or link attenuation directly affects the power consumption of a radio frequency module, but the power is not in a constant state in a steady state communication mode, and the power value displayed on a power analyzer panel is in a real-time rapid jump state, so that the judgment and recording of the maximum power consumption value of the whole machine are not facilitated.
Therefore, a method is needed to solve the problem that the existing power analyzer has a fast data refresh frequency and is inconvenient to observe.
The above information disclosed in the background section is only for enhancement of understanding of the background art from the technology described herein and, therefore, may contain some information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
The application mainly aims to provide an auxiliary device of a power analyzer, which is used for solving the problems that the data refreshing frequency of the power analyzer in the prior art is faster and the observation is inconvenient.
According to an aspect of an embodiment of the present application, there is provided an auxiliary device of a power analyzer, where a first input end and a second input end of the power analyzer are electrically connected to a power supply, respectively, the auxiliary device includes a first transformer, a second transformer, and a controller, where the first transformer includes a first input end, a second input end, and an output end, the first input end of the first transformer is used to be electrically connected to the output end of the power analyzer, and the second input end of the first transformer is used to be electrically connected to the second input end of the power analyzer and the power supply, respectively; the second transformer comprises an input end and an output end, the input end of the second transformer is electrically connected with the output end of the first transformer, and the output end of the second transformer is used for being electrically connected with a load; the controller is used for performing first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in a working state, and is also used for performing second closed-loop control on a second actual current according to the first reference current when the load is in the working state, wherein the control period of the first closed-loop control is smaller than that of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first reference voltage is a preset input voltage of the second transformer, the first actual current is an actual output current of the second transformer, the first reference current is a current set according to the working current of the load, and the second actual current is an actual input current of the first transformer.
Optionally, the controller is configured to perform a first closed-loop control on the first actual current according to the first actual voltage and the first reference voltage when the load is in an operating state, including: under the condition that the load is in a working state, the controller acquires the first actual voltage, the first reference voltage and the first actual current in real time; the controller determines at least a second reference current according to the first actual voltage and the first reference voltage; the controller adjusts the duty ratio of the second transformer according to the second reference current and the first actual current, so that the adjusted first actual current is within a first preset range.
Optionally, the controller determines at least a second reference current according to the first actual voltage and the first reference voltage, including: the controller determines that the difference between the first reference voltage and the first actual voltage is a first difference; the controller determines the second reference current and a first duty cycle adjustment amount according to the first difference value; the controller adjusts the duty ratio of the second transformer according to the first duty ratio adjustment amount so that the adjusted first actual voltage is within a second predetermined range.
Optionally, the controller adjusts the duty cycle of the second transformer according to the second reference current and the first actual current, including: the controller determines that the difference value between the second reference current and the first actual current is a second difference value; the controller determines a second duty cycle adjustment amount according to the second difference value; the controller adjusts the duty ratio of the second transformer according to the second duty ratio adjustment amount so that the adjusted first actual current is within the first predetermined range.
Optionally, the controller is further configured to perform, when the load is in the operating state, a second closed-loop control on a second actual current according to a first reference current, including: under the condition that the load is in the working state, the controller acquires the first reference current and the second actual current in real time; the controller determines that the difference between the first reference current and the second actual current is a third difference; the controller determines a third duty cycle adjustment amount according to the third difference value; the controller adjusts the first transformer according to the third duty cycle adjustment amount so that the adjusted second actual current is within a third predetermined range.
Optionally, the controller is further configured to perform a third closed-loop control on the first actual voltage according to the first reference voltage when the load is not in the working state.
Optionally, the controller is further configured to perform, when the load is not in the operating state, third closed-loop control on the first actual voltage according to the first reference voltage, where the third closed-loop control includes: under the condition that the load is not in the working state, the controller acquires the first reference voltage and the first actual voltage in real time; the controller determines that the difference between the first reference voltage and the first actual voltage is a fourth difference; the controller determines a fourth duty cycle adjustment amount according to the fourth difference value; and under the condition that the load is not in the working state, the duty ratio of the first transformer is adjusted according to the fourth duty ratio adjustment amount, so that the adjusted first actual voltage is in a fourth preset range.
Optionally, the auxiliary device further comprises a decoupling capacitor, a first end of the decoupling capacitor is electrically connected with the output end of the first transformer, and a second end of the decoupling capacitor is electrically connected with the input end of the second transformer.
Optionally, the auxiliary device further comprises a protection circuit, a first end of the protection circuit is electrically connected with the output end of the second transformer, a second end of the protection circuit is used for being electrically connected with the load, and the protection circuit is used for clamping the actual output voltage of the second transformer within a fourth preset range.
Optionally, the first transformer comprises a first DC-DC converter, and the second transformer comprises a second DC-DC converter.
In an embodiment of the application, the auxiliary device of the power analyzer comprises a first transformer, a second transformer and a controller, wherein a first input end of the first transformer is electrically connected with a power supply through the power analyzer, and a second input end of the first transformer is used for being electrically connected with a second input end of the power analyzer and the power supply respectively; the input end of the second transformer is electrically connected with the output end of the first transformer, and the output end of the second transformer is used for being electrically connected with a load; the controller is configured to perform a first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in a working state, and perform a second closed-loop control on a second actual current according to the first reference current when the load is in the working state, where a control period of the first closed-loop control is smaller than a control period of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first actual current is an actual output current of the second transformer, and the second actual current is an actual input current of the first transformer. Compared with the problem that the data refreshing frequency of the power analyzer is faster and is inconvenient to observe in the prior art, the auxiliary device of the power analyzer is characterized in that the first transformer, the second transformer and the controller are built between the load and the power analyzer, when the load is in a working state, the first actual current is subjected to first closed-loop control, the second actual current is subjected to second closed-loop control, the control period of the first closed-loop control is smaller than the control period of the second closed-loop control, and a plurality of first closed-loop controls can be operated in the control period of one second closed-loop control, so that the control of the data refreshing frequency of the power analyzer is realized, the data refreshing frequency of the power analyzer is not too fast, the data of the power analyzer is ensured to be convenient to observe, and the judgment and recording of engineers are facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic diagram of an auxiliary device of a power analyzer according to an embodiment of the application;
FIG. 2 shows a schematic diagram of a closed-loop control scheme of an auxiliary device when a load is in operation, according to an embodiment of the application;
FIG. 3 shows a schematic diagram of another approach to closed loop control of an auxiliary device when a load is in operation, according to an embodiment of the application;
fig. 4 shows a schematic diagram of a closed-loop control scheme of the auxiliary device when the load is in an inactive state according to an embodiment of the application.
Wherein the above figures include the following reference numerals:
101. a power adapter; 102. a power analyzer; 103. a first transformer; 104. decoupling capacitance; 105. a second transformer; 106. a protection circuit; 107. a load; 108. a voltage source circuit.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, the data refresh rate of the power analyzer in the prior art is fast, and the observation is inconvenient, and in order to solve the above problem, in an exemplary embodiment of the present application, an auxiliary device for a power analyzer is provided.
The embodiment of the application provides an auxiliary device of a power analyzer, and the auxiliary device of the power analyzer is described below.
Fig. 1 is a schematic diagram of an auxiliary device of a power analyzer according to an embodiment of the present application, as shown in fig. 1, a first input terminal and a second input terminal of the power analyzer 102 are electrically connected to a power adapter 101, respectively, the auxiliary device of the power analyzer includes a first transformer 103, a second transformer 105, and a controller, wherein the first transformer includes a first input terminal, a second input terminal, and an output terminal, the first input terminal of the first transformer is electrically connected to the output terminal of the power analyzer, and the second input terminal of the first transformer is electrically connected to the second input terminal of the power analyzer and the power supply, respectively; the second transformer comprises an input end and an output endThe input end is electrically connected with the output end of the first transformer, and the output end of the second transformer is electrically connected with the load 107; the controller is used for controlling the load to be in an operating state according to the first actual voltage u 2 And a first reference voltage for a first actual current i 1 ' performing a first closed loop control, said controller being further adapted to control a second actual current i based on a first reference current when said load is in said operating state 1 And performing a second closed-loop control, wherein a control period of the first closed-loop control is smaller than a control period of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first reference voltage is a preset input voltage of the second transformer, the first actual current is an actual output current of the second transformer, the first reference current is a current set according to an operating current of the load, and the second actual current is an actual input current of the first transformer.
The auxiliary device of the power analyzer comprises a first transformer, a second transformer and a controller, wherein a first input end of the first transformer is electrically connected with a power supply through the power analyzer, and a second input end of the first transformer is used for being electrically connected with a second input end of the power analyzer and the power supply respectively; the input end of the second transformer is electrically connected with the output end of the first transformer, and the output end of the second transformer is electrically connected with a load; the controller is configured to perform a first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in an operating state, and perform a second closed-loop control on a second actual current according to the first reference current when the load is in the operating state, wherein a control period of the first closed-loop control is smaller than a control period of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first actual current is an actual output current of the second transformer, and the second actual current is an actual input current of the first transformer. Compared with the problem that the data refreshing frequency of the power analyzer is faster and is inconvenient to observe in the prior art, the auxiliary device of the power analyzer is characterized in that the first transformer, the second transformer and the controller are built between the load and the power analyzer, when the load is in a working state, the first actual current is subjected to first closed-loop control, the second actual current is subjected to second closed-loop control, the control period of the first closed-loop control is smaller than the control period of the second closed-loop control, and a plurality of first closed-loop controls can be operated in the control period of the second closed-loop control, so that the control of the data refreshing frequency of the power analyzer is realized, the data refreshing frequency of the power analyzer is not too fast, the convenience in observation of the data of the power analyzer is ensured, and the judgment and recording of engineers are facilitated.
In the practical application process, the control of the control period of the first closed-loop control and the control period of the second closed-loop control can be added as a terminal program in a closed-loop control algorithm to control the timing interruption time of the first closed-loop control and the second closed-loop control, so as to control the data refresh frequency of the power analyzer.
According to a specific embodiment of the present application, the controller is configured to perform a first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in an operating state, where the first closed-loop control includes: the controller acquires the first actual voltage, the first reference voltage and the first actual current in real time when the load is in an operating state; the controller determines at least a second reference current according to the first actual voltage and the first reference voltage; the controller adjusts the duty ratio of the second transformer according to the second reference current and the first actual current so that the adjusted first actual current is within a first predetermined range. The auxiliary device determines a second reference current according to the acquired first actual voltage and the first reference voltage, and performs closed-loop control on the first actual current by adjusting the duty ratio of the second transformer according to the second reference current and the first actual current, so that the first actual current is further ensured to meet the power requirement of the load, and stable current is further ensured to be provided for the load.
According to another embodiment of the present application, the controller determines at least a second reference current according to the first actual voltage and the first reference voltage, and includes: the controller determines that the difference between the first reference voltage and the first actual voltage is a first difference; the controller determines the second reference current and the first duty ratio adjustment amount according to the first difference value; the controller adjusts the duty ratio of the second transformer according to the first duty ratio adjustment amount so that the adjusted first actual voltage is within a second predetermined range. The second reference current and the first duty ratio adjustment amount are determined by making a difference between the first reference voltage and the first actual voltage, so that the first actual current is further conveniently controlled in a closed loop according to the second reference current, the stable current is further ensured to be provided for the work of a load, and meanwhile, the duty ratio of the second transformer is adjusted according to the first duty ratio adjustment amount, the closed loop control of the first actual voltage is realized, and the stable working voltage is further ensured to be provided for the load. In order to further realize the closed-loop control of the first actual current, the adjusted first actual current is further enabled to meet the power requirement of the load,
according to another embodiment of the present application, the controller adjusts the duty ratio of the second transformer according to the second reference current and the first actual current, and includes: the controller determines that the difference between the second reference current and the first actual current is a second difference; the controller determines a second duty cycle adjustment amount according to the second difference value; the controller adjusts the duty ratio of the second transformer according to the second duty ratio adjustment amount so that the adjusted first actual current is within the first predetermined range.
As shown in FIG. 2The controller includes G f2 (s) Module, G f3 (s) Module, G ild (s) Module and H 2 (s) Module, G f2 The(s) module is used for acquiring the first actual voltage u in real time 2 The first reference voltage U 2ref Determining the first reference voltage U 2ref With the first actual voltage u 2 The difference of the reference current i is a first difference value, and the second reference current i is determined according to the first difference value 1’ref And a first duty ratio adjustment amount for adjusting the second reference current i 1’ref Send to G f3 (s) a module for adjusting the duty ratio of the second transformer according to the first duty ratio adjustment amount so that the adjusted first actual voltage u 2 Is within a second predetermined range. G f3 (s) means for determining said second reference current i 1’ref And the first actual current i 1’ And determining a second duty ratio adjustment amount Δd1 according to the second difference. G ild And(s) a module for adjusting the duty ratio of the second transformer according to the second duty ratio adjustment amount so that the adjusted first actual current is within the first predetermined range. H 2 The(s) module is used for acquiring the first actual current i in real time 1 ' and send to G f3 (s) a module. The above-mentioned scraper G f2 (s) Module, G f3 (s) Module, G ild (s) Module and H 2 And(s) a module, wherein the duty ratio of the second transformer is adjusted to enable the first actual voltage to be stable, so that the output voltage of the second transformer is stable, and the current requirement of the load is ensured while the stable working voltage is provided for the load. Since the control process is based on power balance control, the first actual voltage u 2 The acquisition mode of (a) can adopt circuit sampling.
Specifically, as shown in fig. 2, when the load enters the operating state from the non-operating state, the power is increased, and the first actual voltage u is reduced in a short time 2 A short drop, thus implementing the first closed-loop control on the second transformer circuit with a first actual current i 1 ' is an inner ring of the ring body,at a first actual voltage u 2 The control object is the duty ratio of the second transformer. And based on the power balance of the load, stabilizing the output current and the output voltage of the second transformer. Meanwhile, the power source of the second transformer is the first transformer, so that the second closed-loop control is synchronized according to the power requirement of the second transformer to realize the power balance of the whole auxiliary device, and the data jitter frequency of the power analyzer can be adjusted by controlling the control period of the first closed-loop control and the second closed-loop control.
According to a specific embodiment of the present application, the controller is further configured to perform a second closed-loop control on a second actual current according to a first reference current when the load is in the operating state, where the second closed-loop control includes: under the condition that the load is in the working state, the controller acquires the first reference current and the second actual current in real time; the controller determines that the difference value of the first reference current and the second actual current is a third difference value; the controller determines a third duty cycle adjustment amount according to the third difference value; the controller adjusts the first transformer according to the third duty cycle adjustment amount so that the adjusted second actual current is within a third predetermined range. The duty ratio of the second transformer is adjusted according to the obtained first reference current and second actual current, so that the second actual current after the day is within the third preset range, the current value output by the power analyzer is further ensured to be stable, and meanwhile, the data refreshing frequency of the power analyzer is further controlled by controlling the control period of the second closed-loop control.
In a specific embodiment, as shown in fig. 1 and 3, the control further includes G f4 (s) Module, G i1d (s)' Module and H 3 (s) Module, wherein G f4 The(s) module is used for acquiring the first reference current I 1ref The second actual current i 1 Determining the first reference currentI 1ref The second actual current i 1 The difference of (2) is a third difference, and a third duty ratio adjustment quantity Deltad 2 is determined and outputted to G according to the third difference i1d (s)' Module, G i1d The(s)' module is used for adjusting the first transformer according to the third duty ratio adjustment quantity Deltad 2 so that the adjusted second actual current i 1 Is within a third predetermined range. H 3 The(s) module is used for acquiring the second actual current i in real time 1 And send to G f4 (s) a module. The first reference current I 1ref The actual power is obtained by detecting the real-time voltage and the real-time current of the second transformer, and compensating the efficiency of the second transformer, wherein the efficiency value can be obtained through engineering experience or actual measurement, and the specific calculation formula is I 1ref ＝u 2 i 2 /ηu 1 Wherein i is 2 Is the input current of the second transformer.
According to another embodiment of the present application, the controller is further configured to perform a third closed-loop control on the first actual voltage according to the first reference voltage when the load is not in the operating state. And under the condition that the load is not in the working state, for example, under the conditions of standby and the like, performing third closed-loop control on the first actual voltage through the first reference voltage, and preparing the voltage for the load to enter the working state.
According to another specific embodiment of the present application, the controller is further configured to perform, when the load is not in the operating state, third closed-loop control on the first actual voltage according to the first reference voltage, including: when the load is not in the working state, the controller acquires the first reference voltage and the first actual voltage in real time; the controller determines that the difference between the first reference voltage and the first actual voltage is a fourth difference; the controller determines a fourth duty cycle adjustment amount according to the fourth difference value; and when the load is not in the working state, the duty ratio of the first transformer is adjusted according to the fourth duty ratio adjustment amount, so that the adjusted first actual voltage is within a fourth preset range. Thus, the input voltage of the second transformer is further ensured to be stable, and the preparation is further carried out for the load to enter the working state.
Specifically, as shown in fig. 4, the controller further includes G f1 (s) Module, G u2d (s) Module and H 1 (s) a module, wherein G is as described above f1 The(s) module is used for acquiring the first reference voltage U in real time under the condition that the load is not in the working state 2ref The first actual voltage u 2 Determining the first reference voltage U 2ref The first actual voltage u 2 The difference value of (2) is a fourth difference value, and a fourth duty ratio adjustment quantity Deltad 3 is determined according to the fourth difference value and is output to G u2d (s) a module. G u2d The(s) module is used for adjusting the duty ratio of the first transformer according to the fourth duty ratio adjustment quantity Deltad 3 so that the adjusted first actual voltage u 2 Is within a fourth predetermined range. H 1 The(s) module is used for acquiring the first actual voltage u in real time 2 And send to G f1 (s) a module. Adjusting the duty cycle of the first transformer to make the first actual voltage u by a closed loop compensation algorithm 2 And (3) stability. G f1 The(s) module typically employs an optimization algorithm, such as may be used with conventional PID control; g u2d The calculation of the(s) module may be derived by modeling the small signal of the first transformer.
Specifically, as shown in fig. 1, when the load is not in the operating state, the output end of the auxiliary device is in a light load or no load state. The first transformer will be u 1 Boost to u 2 Then step down to u by a second transformer 1 ' an initial voltage environment is established. When the auxiliary device has certain power consumption or the output end has certain light load variation requirement, u 2 The discharge voltage drops. To ensure u 2 The controller establishes the third closed loop control, at u 1 On the basis of 'stable', the second transformer input voltage is controlled to be stable by adjusting the duty ratio. Of course, the first transformer may also first convert u 1 Step down to u 2 Then the voltage is increased to u by a second transformer 1 ' to ensure u 2 And (3) stability.
Specifically, when the load is in an operating state, the auxiliary device needs to increase power output to meet the requirement, and at this time, the auxiliary device enters a power flow state, and when the load is not in an operating state, the state of the auxiliary device is a standby state. The main difference between the power flow state and the standby state is the power level and involves current power control. In the power flow state, in order to maintain the power demand of the load, the auxiliary device needs to control the increase of the circuit current, and the circuit current is added as the control amount in addition to the standby state. According to an embodiment of the present application, as shown in fig. 1, the auxiliary device further includes a decoupling capacitor 104, a first end of the decoupling capacitor 104 is electrically connected to the output terminal of the first transformer 103, and a second end of the decoupling capacitor 104 is electrically connected to the input terminal of the second transformer 105. The decoupling capacitor can provide a more stable power supply and can reduce noise of the original coupled to a power supply terminal. And because of the voltage stabilizing characteristic of the decoupling capacitor, in the first closed-loop control, the control period of the outer ring is far longer than that of the inner ring.
Under the condition that the decoupling capacitor is large enough to meet the charge-discharge bearing capacity, the accurate requirement of the efficiency value of the second transformer can be reduced.
According to another embodiment of the present application, as shown in fig. 1, the auxiliary device further includes a protection circuit 106, a first end of the protection circuit 106 is electrically connected to the output terminal of the second transformer 105, a second end of the protection circuit 106 is electrically connected to the load 107, and the protection circuit 106 is configured to clamp an actual output voltage of the second transformer 105 within a fourth predetermined range. Thus, the voltage supplied to the load is further ensured to meet the load requirement, and the normal operation and the safety performance of the load are further ensured.
In another embodiment of the present application, as shown in fig. 1, the auxiliary device further includes a voltage source circuit 108, the voltage source circuit 108 includes a reference voltage source and a high impedance line, and the reference voltage source is electrically connected to the output terminal of the second transformer 105 and the protection circuit 106 through the high impedance line. Wherein the voltage U of the reference voltage source 1 ＝u 1 The reference voltage source mainly provides a reference voltage for the closed loop control process, so that the output voltage u of the second transformer 105 1 ' stabilizing, e.g. when the auxiliary device enters a power flow state, the first actual voltage u at the input of the second transformer 105 2 The precondition for stabilization is the voltage u at its output 1 ' stability; the reference voltage source also ensures that the load 107 is powered stably. The high-impedance circuit ensures the reference voltage source U 1 The load effect on the power circuit is lower, and the isolation effect is achieved, so that the voltage source circuit only provides voltage effect, and the high-impedance circuit can be composed of a high-resistance resistor or an operational amplifier circuit.
According to yet another embodiment of the present application, the first transformer includes a first DC-DC converter, and the second transformer includes a second DC-DC converter.
Specifically, the first transformer is a first DC-DC converter, and the second transformer is a second DC-DC converter.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
the auxiliary device of the power analyzer comprises a first transformer, a second transformer and a controller, wherein a first input end of the first transformer is electrically connected with a power supply through the power analyzer, and a second input end of the first transformer is used for being electrically connected with a second input end of the power analyzer and the power supply respectively; the input end of the second transformer is electrically connected with the output end of the first transformer, and the output end of the second transformer is electrically connected with a load; the controller is configured to perform a first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in an operating state, and perform a second closed-loop control on a second actual current according to the first reference current when the load is in the operating state, wherein a control period of the first closed-loop control is smaller than a control period of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first actual current is an actual output current of the second transformer, and the second actual current is an actual input current of the first transformer. Compared with the problem that the data refreshing frequency of the power analyzer is faster and is inconvenient to observe in the prior art, the auxiliary device of the power analyzer is characterized in that the first transformer, the second transformer and the controller are built between the load and the power analyzer, when the load is in a working state, the first actual current is subjected to first closed-loop control, the second actual current is subjected to second closed-loop control, the control period of the first closed-loop control is smaller than the control period of the second closed-loop control, and a plurality of first closed-loop controls can be operated in the control period of the second closed-loop control, so that the control of the data refreshing frequency of the power analyzer is realized, the data refreshing frequency of the power analyzer is not too fast, the convenience in observation of the data of the power analyzer is ensured, and the judgment and recording of engineers are facilitated.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. An auxiliary device of a power analyzer, the first input terminal and the second input terminal of the power analyzer are respectively electrically connected with a power supply, the auxiliary device is characterized by comprising:
the first transformer comprises a first input end, a second input end and an output end, wherein the first input end of the first transformer is used for being electrically connected with the output end of the power analyzer, and the second input end of the first transformer is used for being electrically connected with the second input end of the power analyzer and the power supply respectively;
the second transformer comprises an input end and an output end, wherein the input end of the second transformer is electrically connected with the output end of the first transformer, and the output end of the second transformer is used for being electrically connected with a load;
the controller is used for carrying out first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in a working state, and carrying out second closed-loop control on a second actual current according to the first reference current when the load is in the working state, wherein the control period of the first closed-loop control is smaller than that of the second closed-loop control, the first actual voltage is an actual input voltage of the second transformer, the first reference voltage is a preset input voltage of the second transformer, the first actual current is an actual output current of the second transformer, the first reference current is a current set according to the working current of the load, the second actual current is an actual input current of the first transformer,
the controller is configured to perform a first closed-loop control on a first actual current according to a first actual voltage and a first reference voltage when the load is in a working state, and includes:
under the condition that the load is in a working state, the controller acquires the first actual voltage, the first reference voltage and the first actual current in real time;
the controller determines at least a second reference current according to the first actual voltage and the first reference voltage;
the controller adjusts the duty ratio of the second transformer according to the second reference current and the first actual current so that the adjusted first actual current is within a first preset range,
the controller is further configured to perform a second closed-loop control on a second actual current according to a first reference current when the load is in the operating state, including:
under the condition that the load is in the working state, the controller acquires the first reference current and the second actual current in real time;
the controller determines that the difference between the first reference current and the second actual current is a third difference;
the controller determines a third duty cycle adjustment amount according to the third difference value;
the controller adjusts the first transformer according to the third duty cycle adjustment amount so that the adjusted second actual current is within a third predetermined range.
2. The auxiliary device of claim 1 wherein the controller determining at least a second reference current based on the first actual voltage and the first reference voltage comprises:
the controller determines that the difference between the first reference voltage and the first actual voltage is a first difference;
the controller determines the second reference current and a first duty cycle adjustment amount according to the first difference value;
the controller adjusts the duty ratio of the second transformer according to the first duty ratio adjustment amount so that the adjusted first actual voltage is within a second predetermined range.
3. The auxiliary device of claim 1, wherein the controller adjusts the duty cycle of the second transformer based on the second reference current and the first actual current, comprising:
the controller determines that the difference value between the second reference current and the first actual current is a second difference value;
the controller determines a second duty cycle adjustment amount according to the second difference value;
the controller adjusts the duty ratio of the second transformer according to the second duty ratio adjustment amount so that the adjusted first actual current is within the first predetermined range.
4. The auxiliary device of claim 1, wherein the controller is further configured to perform a third closed loop control of the first actual voltage based on the first reference voltage if the load is not in the operating state.
5. The auxiliary device of claim 4 wherein the controller is further configured to perform a third closed loop control of the first actual voltage based on the first reference voltage if the load is not in the operational state, comprising:
under the condition that the load is not in the working state, the controller acquires the first reference voltage and the first actual voltage in real time;
the controller determines that the difference between the first reference voltage and the first actual voltage is a fourth difference;
the controller determines a fourth duty cycle adjustment amount according to the fourth difference value;
and under the condition that the load is not in the working state, the duty ratio of the first transformer is adjusted according to the fourth duty ratio adjustment amount, so that the adjusted first actual voltage is in a fourth preset range.
6. The auxiliary device according to any one of claims 1 to 5, further comprising:
and the first end of the decoupling capacitor is electrically connected with the output end of the first transformer, and the second end of the decoupling capacitor is electrically connected with the input end of the second transformer.
7. The auxiliary device according to any one of claims 1 to 5, further comprising:
the first end of the protection circuit is electrically connected with the output end of the second transformer, the second end of the protection circuit is electrically connected with the load, and the protection circuit is used for clamping the actual output voltage of the second transformer in a fourth preset range.
8. The auxiliary device of any one of claims 1-5, wherein the first transformer comprises a first DC-DC converter and the second transformer comprises a second DC-DC converter.
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