Power consumption control circuit, power consumption control device and electronic equipment

Abstract

The utility model provides a power consumption control circuit, a power consumption control device and electronic equipment. The circuit comprises a control unit, at least one fixed power consumption unit and a variable power consumption unit. The control unit is connected with the first end of the fixed power consumption unit and the first end of the variable power consumption unit. The second end of the fixed power consumption unit and the second end of the variable power consumption unit are connected with the first end of the power supply; the third end of the fixed power consumption unit and the third end of the variable power consumption unit are both connected with the second end of the power supply. And the control unit is used for determining a target power consumption unit from the at least one fixed power consumption unit and the variable power consumption unit according to the target power consumption value and the power consumption of the fixed power consumption unit, and controlling the target power consumption unit to be conducted so as to conduct a loop of the power supply and the target power consumption unit. According to the circuit, the change range of power consumption is reduced, and the smoothness of an equivalent power consumption dotted line is improved.

Description

Technical Field

[0001] The present application relates to power consumption control technology, and in particular to a power consumption control circuit, a power consumption control device and an electronic device. Background Art

[0002] With the development of electronic technology, electronic devices with heating functions have been used more and more widely. At present, pulse width modulation (PWM) signals are usually used to control the power consumption generated by the heating module to control the heating temperature of the heating device. However, this control method has the problem of large fluctuations in actual power consumption and uneven equivalent power consumption dotted line, which makes it difficult to apply to application scenarios that require precise control of power consumption and equivalent power consumption dotted line. Utility Model Content

[0003] The present application provides a power consumption control circuit, a power consumption control device and an electronic device, which are used to solve the problem that the actual power consumption fluctuates greatly and the equivalent power consumption dotted line is not smooth in the control method of the existing circuit, and it is difficult to apply it to application scenarios that require precise control of power consumption and equivalent power consumption dotted line.

[0004] In one aspect, the present application provides a power consumption control circuit, the power consumption control circuit comprising: a control unit, at least one fixed power consumption unit, and a variable power consumption unit;

[0005] The control unit is connected to the first end of the fixed power consumption unit and the first end of the variable power consumption unit respectively; the second end of the fixed power consumption unit and the second end of the variable power consumption unit are both connected to the first end of the power supply; the third end of the fixed power consumption unit and the third end of the variable power consumption unit are both connected to the second end of the power supply;

[0006] The control unit is used to determine a target power consumption unit from at least one of the fixed power consumption unit and the variable power consumption unit according to a target power consumption value and the power consumption of the fixed power consumption unit, and control the target power consumption unit to be turned on so as to conduct a loop between the power supply and the target power consumption unit.

[0007] Optionally, there are multiple fixed power consumption units, and the power consumption of the multiple fixed power consumption units is the same.

[0008] Optionally, the fixed power consumption unit includes: a first switch and a first load;

[0009] The first end of the first switch is the first end of the fixed power consumption unit, the second end of the first switch is connected to the first end of the first load, the second end of the first load is the second end of the fixed power consumption unit, and the third end of the first switch is the third end of the fixed power consumption unit;

[0010] Or, the first end of the first switch is the first end of the fixed power consumption unit, the second end of the first switch is the second end of the fixed power consumption unit, the third end of the first switch is connected to the first end of the first load, and the second end of the first load is the third end of the fixed power consumption unit;

[0011] The control unit is specifically used to control the first switch to be in a normally closed state or a normally open state; wherein, when the first switch is in the normally closed state, the power supply is connected to the circuit of the fixed power consumption unit, and when the first switch is in the normally open state, the power supply is disconnected from the circuit of the fixed power consumption unit.

[0012] Optionally, the variable power consumption unit includes: a second switch; a first end of the second switch is a first end of the variable power consumption unit;

[0013] The control unit is specifically configured to control the conduction time of the second switch according to a pulse width modulation signal that matches the power consumption required to be achieved by the variable power consumption unit.

[0014] Optionally, the second end of the second switch is the second end of the variable power consumption unit, and the third end of the second switch is the third end of the fixed power consumption unit.

[0015] Optionally, the variable power consumption unit further includes: a second load;

[0016] The second end of the second switch is connected to the first end of the second load, the second end of the second load is the second end of the variable power consumption unit, and the third end of the second switch is the third end of the variable power consumption unit;

[0017] Or, the second end of the second switch is the second end of the variable power consumption unit, the third end of the second switch is connected to the first end of the second load, and the second end of the second load is the third end of the variable power consumption unit.

[0018] Optionally, the first load and the second load each include at least one resistor connected in series.

[0019] Optionally, the power consumption control circuit further includes: an input unit; the control unit is connected to the input unit;

[0020] The control unit is further configured to receive the target power consumption value sent by the input unit.

[0021] On the other hand, the present application provides a power consumption control device, which includes: a power consumption control circuit as described in any one of the first aspects.

[0022] On the other hand, the present application provides an electronic device, comprising: a power consumption control circuit as described in any one of the first aspects.

[0023] The power consumption control circuit, power consumption control device and electronic device provided by the present application determine the target power consumption unit according to the target power consumption value by setting a fixed power consumption unit and a variable power consumption unit in the circuit. The target power consumption unit can generate the target power consumption value by consuming electric energy, and the variation range of the power consumption actually generated is the power consumption variation range of the variable power consumption unit, thereby reducing the variation range of the power consumption and improving the smoothness of the equivalent power consumption dotted line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 A schematic diagram of the structure of a power consumption control circuit of an electronic device before improvement;

[0026] Figure 2 A schematic diagram of power consumption and equivalent power consumption of an electronic device before improvement;

[0027] Figure 3 A schematic diagram of the structure of a first power consumption control circuit provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a second power consumption control circuit provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of a third power consumption control circuit provided in an embodiment of the present application;

[0030] Figure 6 A dotted line diagram of power consumption and equivalent power consumption provided in an embodiment of the present application.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0033] Figure 1 This is a schematic diagram of the structure of a power consumption control circuit of an electronic device before improvement. Figure 1 As shown, the circuit may include a control unit, a heating module, and a power supply. The heating module may include a transistor (e.g. Figure 1 Q6 in), heating elements (such as Figure 1 R6 in the figure). The heating module can be one or more. Figure 1 This is a schematic diagram taking a heating module as an example.

[0034] In this example, the control unit is connected to the first end of the transistor Q6, the second end of the transistor Q6 is connected to the first end of the heating element R6, the second end of the heating element R6 is connected to the first end of the power supply 104, and the third end of the transistor Q6 is connected to the second end of the power supply.

[0035] The power supply is used to supply power to the heating element R6. The first end of the power supply is, for example, the positive electrode "+" of the power supply, and the second end of the power supply is, for example, the negative electrode "-" of the power supply.

[0036] The control unit sends a corresponding pulse width modulation (PWM) signal to the heating module according to the target power consumption, controls the heating module to turn on or off, thereby controlling the heating module to generate corresponding power consumption, so that the electronic device can heat the environment to the corresponding temperature.

[0037] Specifically, when the control module sends a high-level PWM signal to transistor Q6, transistor Q6 is turned on, at which time the loop between the heating module and the power supply is turned on, the heating module generates power consumption, and converts electrical energy into heat energy. When the control module sends a low-level PWM signal to transistor Q6, transistor Q6 is turned off, at which time the loop between the heating module and the power supply is disconnected, and the heating module stops generating power consumption.

[0038] The control unit, for example, stores a mapping relationship between the target heating temperature and the target power consumption of the electronic device, as well as the value of the maximum power consumption that the target heating module can generate. It should be understood that when there is one heating module, the heating module is the target heating module, and the target power consumption is the target power consumption of the heating module; when there are multiple heating modules, one of the heating modules is the target heating module, and the target power consumption is the target power consumption of the target heating module. The control unit can obtain the target power consumption of the target heating module by obtaining the target heating temperature of the electronic device and the mapping relationship between the target heating temperature and the target power consumption. The duty cycle of the PWM signal can be obtained based on the target power consumption and the maximum power consumption. For example, the duty cycle of the PWM signal can be calculated according to the following formula:

[0039] Duty cycle = P 目标功耗 / P 最大功耗

[0040] The duty cycle indicates the duration that the PWM outputs a high-level signal within a time period T.

[0041] Continue with Figure 1 The heating module shown is taken as an example. For example, the maximum power consumption value is 40 watts (W) and the target power consumption value is 20W. The duty cycle of the PWM signal is 50%, that is, the duration of the high level in a time period T is T / 2. In a time period T, the control unit sends a high-level signal to the transistor Q6 within 0-T / 2, the transistor Q6 is turned on, the heating module and the power supply circuit are turned on, and the heating module is heated and consumes power within 0-T / 2. The control unit sends a low-level signal to the transistor Q6 within T / 2-T, the transistor Q6 is turned off, the heating module and the power supply circuit are disconnected, and the heating module stops generating power consumption.

[0042] Below Figure 1 The power consumption and equivalent power consumption of the power consumption control circuit of the electronic device shown are illustrated by the dotted line.

[0043] Figure 2 This is a dotted line diagram of power consumption and equivalent power consumption of an electronic device before improvement. Figure 2 As shown, the horizontal axis represents time (time, t), and the PWM signal controls the heating module to turn on or off at different times t.

[0044] The vertical axis represents power consumption (Power, P), that is, the power consumption generated by heating after the heating module is turned on. The power consumption stops when the heating module is turned off.

[0045] The power consumption P1 represents the value of full load power consumption, that is, the maximum power consumption that can be generated when all the heating modules are turned on.

[0046] The following is a schematic illustration of the power consumption generated by the heating module within a time period T. The power consumption P1 is 40W and the target power consumption is 20W.

[0047] refer to Figure 2 The solid line between the two points (0, P1) and (T / 2, P1) and the solid line between the two points (T / 2, 0) and (T, 0) represent the actual power consumption generated by the heating module at different times t.

[0048] The area surrounded by the three points (0, 0), (T, 0), and (0, P1) represents the equivalent power consumption of the heating module in a time period T, that is, the target power consumption value. It should be understood that the equivalent power consumption can be, for example, the average power consumption over a period of time. Figure 2 An example is given in which the equivalent power consumption is the average power consumption within a time period T.

[0049] The dotted line between the two points (0, P1) and (T, 0) represents the equivalent power consumption dotted line. It should be understood that the power consumption dotted line can be a line drawn by the power consumption at each moment, and the equivalent power consumption dotted line can be, for example, the average power consumption dotted line over a period of time. Figure 2 The dotted line of equivalent power consumption within a time period T is taken as an example for schematic description.

[0050] Figure 1 In the power consumption control circuit shown, the control unit controls the heating module to turn on or off through a PWM signal, so that the heating module can generate a target power consumption value within a time period T, so that the electronic device can heat the environment to the target temperature within a time period T. However, the actual power consumption fluctuates between 0-40W, and the actual heating temperature will also fluctuate accordingly. The equivalent power consumption dotted line is also a large sawtooth shape, and the equivalent power consumption dotted line is not smooth. There are problems such as large fluctuations in actual power consumption and uneven equivalent power consumption dotted lines, which makes it difficult to apply to application scenarios that require precise control of power consumption and equivalent power consumption dotted lines.

[0051] In view of this, the present application proposes a power consumption control circuit, which adjusts the original PWM circuit that controls the heating of the heating module to a combination of a fixed power consumption unit and a variable power consumption unit, and uses a PWM signal to control the variable power consumption unit to turn on or off, thereby reducing the amplitude of power consumption fluctuations, achieving precise control of power consumption, and improving the smoothness of the equivalent power consumption dotted line.

[0052] It should be understood that the above examples all take one-way PWM control as an example of the existing problems. When the power consumption control circuit of the electronic device has multiple PWM controls, similar problems exist for each PWM control. Accordingly, the problems existing in each channel can be solved by adopting the method of this embodiment, so as to reduce the amplitude of power consumption fluctuation corresponding to each channel. For ease of understanding, the following is an example of adjusting the circuit of the original one-way PWM control heating module to a combination of a fixed power consumption unit and a variable power consumption unit.

[0053] The following are possible application scenarios involved in the embodiments of the present application, for example, any one of them: (1) When performing reliability testing on a server, the power consumption generated by a heating module independent of the server can be controlled to keep the external environment of the server at a constant temperature, for example, the temperature can be 55 degrees Celsius. (2) When evaluating the power output capacity of a DC power supply, a simulated load test can be performed by controlling the power consumption to maintain a constant power consumption mode. The above application scenarios all require precise control of the power consumption and the equivalent power consumption dotted line.

[0054] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0055] Figure 3 This is a schematic diagram of the structure of the first power consumption control circuit provided in the embodiment of the present application. Figure 3 As shown, the power consumption control circuit 100 may include: a control unit 101 , at least one fixed power consumption unit 102 , and a variable power consumption unit 103 .

[0056] The control unit 101 is connected to the first end of the fixed power consumption unit 102 and the first end of the variable power consumption unit 103 respectively; the second end of the fixed power consumption unit 102 and the second end of the variable power consumption unit 103 are both connected to the first end of the power supply 104; the third end of the fixed power consumption unit 102 and the third end of the variable power consumption unit 103 are both connected to the second end of the power supply 104.

[0057] The power supply 104 may be any device capable of providing a constant voltage to a load, such as a DC power supply, a battery, an energy storage capacitor, etc. The power supply 104 may include a positive electrode and a negative electrode, and for ease of description, the following embodiments are described by taking the first end of the power supply 104 as the positive electrode and the second end as the negative electrode as an example.

[0058] The control unit 101 may be any module that can trigger its output signal based on a high level or a low level, for example, it may include any processing unit such as a single chip microcomputer, an embedded processor, a programmable logic device, etc. Optionally, in addition to the processing unit, it may also include a peripheral circuit unit of the processing unit, etc., which is not limited in this application.

[0059] The fixed power consumption unit 102 may be any module that can be connected to the power supply 104 and can be turned on under the control of the control unit 101, thereby generating fixed power consumption. The power consumption of the fixed power consumption unit 102 may be, for example, the value of the electric energy consumed by the fixed power consumption unit 102. When the power consumption control circuit 100 provided in the embodiment of the present application includes a plurality of fixed power consumption units 102, the total power consumption generated by the plurality of fixed power consumption units 102 is the sum of the power consumption generated by the turned-on fixed power consumption units 102. The control unit 101 may send a high-level signal to the fixed power consumption unit 102 to control the fixed power consumption unit 102 to be turned on, and the loop between the power supply 104 and the fixed power consumption unit 102 is turned on, thereby generating fixed power consumption.

[0060] The variable power consumption unit 103 may be any module that can be connected to the power supply 104 and can be turned on under the control of the control unit 101, thereby generating power consumption. Unlike the fixed power consumption unit 102, the control unit 101 can control the turn-on duration of the variable power consumption unit 103. Accordingly, when the corresponding turn-on duration of the variable power consumption unit 103 is different, the power consumption generated by it is different. The power consumption of the variable power consumption unit 103 may be, for example, the value of the electric energy consumed by the variable power consumption unit 103. The control unit 101 may send a PWM signal to the variable power consumption unit 103. When the PWM signal is at a high level, the variable power consumption unit 103 is turned on. When the PWM signal is at a low level, the variable power consumption unit 103 is turned off. When the variable power consumption unit 103 is turned on, the power supply 104 is turned on to the loop of the variable power consumption unit 103, thereby generating power consumption. The duty cycle of the PWM signal can be used to adjust the turn-on duration of the variable power consumption unit 103.

[0061] The control unit 101 can be used to determine the target power consumption unit from at least one fixed power consumption unit 102 and the variable power consumption unit 103 according to the target power consumption value and the power consumption of the fixed power consumption unit 102, and control the target power consumption unit to be turned on to turn on the circuit between the power supply 104 and the target power consumption unit.

[0062] The following describes how to determine the target power consumption unit based on the target power consumption value and the power consumption of the fixed power consumption unit 102:

[0063] The target power consumption value may be the sum of the electric energy consumed by the target power consumption units.

[0064] The control unit 101 can, for example, obtain the target power consumption value by receiving data sent by the input unit 105. The input unit 105 can be a unit of the power consumption control circuit 100, or a unit of other circuits independent of the power consumption control circuit 100. The power consumption control circuit 100 can, for example, include the input unit 105. The control unit 101 and the input unit 105 can, for example, be connected through any interface, such as a parallel interface, a USB interface, an IIC interface, a general-purpose input / output (GPIO) port, a UART interface, etc., which is specifically related to the circuit structure of the control unit 101 and the input unit 105, and this application does not limit this. Figure 3 The schematic diagram is a diagram showing the connection between the control unit 101 and the input unit 105 via a UART interface. The input unit 105 may include, for example, a switch, a button, a touch screen, or any other circuit having an input function.

[0065] Alternatively, the target power consumption value may be pre-set in an internal memory of the control unit 101, and the control unit 101 obtains the target power consumption value by reading the internal memory.

[0066] The fixed power consumption value corresponding to the fixed power consumption unit 102 and the power consumption value range corresponding to the variable power consumption unit 103 may be pre-set in the internal memory of the control unit 101, and the control unit 101 obtains the power consumption of the fixed power consumption unit 102 by reading the internal memory. Alternatively, the control unit 101 pre-stores a mapping relationship between the target power consumption and the power consumption value of the fixed power consumption unit 102 in the internal memory, so the control unit 101 can determine the fixed power consumption unit 102 in the target power consumption unit according to the target power consumption value and the mapping relationship.

[0067] The relationship between the target power consumption value and the power consumption of the fixed power consumption unit 102 and the variable power consumption unit 103 is as follows:

[0068] P 目标功耗 =P 固定功耗1 +P 固定功耗2 +…P 固定功耗n +P 可变功耗单元

[0069] Among them, P 目标功耗 Indicates the target power consumption value.

[0070] P 固定功耗n represents the power consumption of the nth fixed power consumption unit 102 in the target power consumption unit, where n is greater than or equal to 1 and n is less than or equal to the number of fixed power consumption units 102 in the power consumption control circuit 100 .

[0071] P 可变功耗单元Indicates the power consumption that the variable power consumption unit 103 needs to generate.

[0072] According to the target power consumption value and the power consumption of the fixed power consumption unit 102, the determined target power consumption unit may include the fixed power consumption unit 102 and the variable power consumption unit 103, or only include the fixed power consumption unit 102. On the premise that the actual power consumption of the target power consumption unit meets the target power consumption value, it can be determined according to actual needs.

[0073] When the target power consumption unit only includes the fixed power consumption unit 102, it means that the power consumption of the fixed power consumption unit 102 can match the target power consumption value. At this time, it can be considered that the power consumption is constant, and the equivalent power consumption dotted line is a straight line.

[0074] When the target power consumption unit includes the fixed power consumption unit 102 and the variable power consumption unit 103, the power consumption generated by the fixed power consumption unit 102 is constant, and the power consumption amplitude variation range of the variable power consumption unit 103 is the difference between the target power consumption value and the power consumption of the fixed power consumption unit 102, and the difference is smaller than the target power consumption value. As a result, the amplitude variation range of the variable power consumption unit 103 is reduced, and the variation range of the target power consumption is reduced, so that the equivalent power consumption dotted line is smoother.

[0075] For some special cases, such as when the power consumption to be generated is relatively small, the target power consumption unit may also only include the variable power consumption unit 103. Although in this case, the variable power consumption unit 103 is used to generate the target power consumption in both the embodiment of the present application and the prior art. However, since the fixed power consumption unit 102 is provided in the power consumption control circuit 100 of the embodiment of the present application, the maximum power consumption actually required to be generated by the variable power consumption unit 103 is smaller than that in the prior art circuit with only the variable power consumption unit, and the maximum power consumption actually required to be generated by the device is smaller, so the amplitude of the equivalent power consumption dotted line is smaller than that in the prior art, and the equivalent power consumption dotted line is smoother.

[0076] In summary, the power consumption control circuit 100 provided in the embodiment of the present application determines the target power consumption unit according to the target power consumption value by setting the fixed power consumption unit 102 and the variable power consumption unit 103 in the circuit. The target power consumption unit can generate the target power consumption value by consuming electric energy, and the variation range of the power consumption actually generated is the power consumption variation range of the variable power consumption unit 103, thereby reducing the variation range of the power consumption and improving the smoothness of the equivalent power consumption dotted line.

[0077] It should be understood that in the above embodiment, the power consumption of each fixed power consumption unit 102 may be the same or different.

[0078] If the power consumption of each fixed power consumption unit 102 is the same, the relationship between the target power consumption value and the power consumption of the fixed power consumption unit 102 and the variable power consumption unit 103 can be simplified as follows:

[0079] P 目标功耗 =P 单个固定功耗 *N+P 可变功耗单元

[0080] Among them, P 单个固定功耗 is the power consumption of a fixed power consumption unit 102.

[0081] N is the number of fixed power consumption units 102 in the target power consumption unit.

[0082] In this implementation, the control unit 101 can 目标功耗 / P 单个固定功耗 Get the divisor and obtain the value of N.

[0083] The control unit 101 controls the N fixed power consumption units 102 to be turned on, thereby achieving the effect of controlling the fixed power consumption units 102 in the target power consumption units to be turned on. The method for determining the target power consumption units is more convenient, and the control logic is simpler and more flexible.

[0084] For example, the power consumption control circuit 100 includes five fixed power consumption units 102 and variable power consumption units 103, each fixed power consumption unit 102 consumes 6W of power, and the full load power consumption of the variable power consumption unit 103 is 10W. The total power consumption generated by the power consumption control circuit 100 is 40W.

[0085] If the target power consumption value is 20W, according to the above formula, it can be calculated that the number of fixed power consumption units 102 in the target power consumption unit is 3, and the power consumption that the variable power consumption unit 103 needs to achieve is 2W.

[0086] If the target power consumption value is 18W, according to the above formula, it can be calculated that the number of fixed power consumption units 102 in the target power consumption unit is 3, and the power consumption that the variable power consumption unit 103 needs to achieve is 0W.

[0087] If the target power consumption value is 5W, according to the above formula, it can be calculated that the number of fixed power consumption units 102 in the target power consumption unit is 0, and the power consumption that the variable power consumption unit 103 needs to achieve is 5W.

[0088] The following is an example of possible structures of the fixed power consumption unit 102 and the variable power consumption unit 103 involved in this embodiment.

[0089] Figure 4 This is a schematic diagram of the structure of the second power consumption control circuit provided in the embodiment of the present application. Figure 4 As shown, in the power consumption control circuit 100 , the fixed power consumption unit 102 may include: a first switch and a first load.

[0090] The first end of the first switch is the first end of the fixed power consumption unit 102 , the second end of the first switch is connected to the first end of the first load, the second end of the first load is the second end of the fixed power consumption unit 102 , and the third end of the first switch is the third end of the fixed power consumption unit 102 .

[0091] Or, the first end of the first switch is the first end of the fixed power consumption unit 102, the second end of the first switch is the second end of the fixed power consumption unit 102, the third end of the first switch is connected to the first end of the first load, and the second end of the first load is the third end of the fixed power consumption unit 102.

[0092] Figure 4 The description is made by taking the first end of the first switch as the first end of the fixed power consumption unit 102, the second end of the first switch being connected to the first end of the first load, the second end of the first load being the second end of the fixed power consumption unit 102, and the third end of the first switch being the third end of the fixed power consumption unit 102 as an example.

[0093] The first switch, for example, can be any switch that is turned on based on a high level or a low level, for example, a triode, a field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), also known as a MOS tube, a thyristor, etc. Correspondingly, the control unit 101 is specifically used to control the first switch to be in a normally closed state or a normally open state. For example, the control unit 101 can control it by outputting a high level or a low level signal to the first switch. When the first switch is in a normally closed state, the power supply 104 is connected to the circuit of the fixed power consumption unit 102, and when the first switch is in a normally open state, the power supply 104 is disconnected from the circuit of the fixed power consumption unit 102.

[0094] The first load may be, for example, any combination of one or more devices that consume electrical energy, such as a heating wire, a heating tube, a heating film, a thermistor, a common resistor, and the like.

[0095] The variable power consumption unit 103 may include: a second switch. The second switch may be any switch that is turned on based on a high level or a low level, such as a triode, a MOS tube, a thyristor, etc. The first end of the second switch is the first end of the variable power consumption unit 103 .

[0096] A possible implementation manner: the second end of the second switch may be the second end of the variable power consumption unit 103 , and the third end of the second switch may be the third end of the fixed power consumption unit 102 .

[0097] Another possible implementation manner: the variable power consumption unit 103 may further include: a second load. The second load and the first load may be loads of the same type, and may be specifically set according to actual needs.

[0098] The second end of the second switch is connected to the first end of the second load, the second end of the second load is the second end of the variable power consumption unit 103 , and the third end of the second switch is the third end of the variable power consumption unit 103 .

[0099] Or, the second end of the second switch is the second end of the variable power consumption unit 103 , the third end of the second switch is connected to the first end of the second load, and the second end of the second load is the third end of the variable power consumption unit 103 .

[0100] Figure 4 The second end of the second switch is connected to the first end of the second load, the second end of the second load is the second end of the variable power consumption unit 103 , and the third end of the second switch is the third end of the variable power consumption unit 103 .

[0101] It should be understood that when the first switch and / or the second switch adopts other switches, the circuit can be adaptively adjusted. For details, please refer to the existing switch circuit architecture, which will not be described in detail.

[0102] The first load and the second load may each include at least one resistor, and the resistors may be connected in series or in parallel. By connecting the resistors in series or in parallel, more resistance values ​​may be set, thereby making the power consumption of the fixed power consumption unit 102 and the full load power consumption of the variable power consumption unit 103 more flexible.

[0103] Below, taking the control unit 101 as a single-chip microcomputer, the first switch and the second switch as N-type metal oxide semiconductors (N-Metal-Oxide-Semiconductor, NMOS), that is, NMOS tubes as an example, the corresponding power consumption control circuit 100 includes an application scenario of five fixed power consumption units 102 and a variable power consumption unit 103, how the embodiment of the present application generates the target power consumption is explained.

[0104] Figure 5 This is a schematic diagram of the structure of the third power consumption control circuit provided in the embodiment of the present application. Figure 5 As shown, in the power consumption control circuit 100, the control unit 101 may include: GPIO_1 pin, GPIO_2 pin, GPIO_3 pin, GPIO_4 pin, GPIO_5 pin, PWM pin. The first end of the power supply 104 is the positive pole "+", and the second end of the power supply 104 is the negative pole / ground "-".

[0105] The first fixed power consumption unit 102 includes: a first switch Q1 and a first resistor R1. The GPIO_1 pin is connected to a first end of the first switch Q1, a second end of the first switch Q1 is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to a first end of a power supply 104, and a third end of the first switch Q1 is connected to a second end of the power supply 104.

[0106] The second fixed power consumption unit 102 includes: a first switch Q2 and a first resistor R2. The GPIO_2 pin is connected to a first end of the first switch Q2, a second end of the first switch Q2 is connected to a first end of the first resistor R2, a second end of the first resistor R2 is connected to a first end of the power supply 104, and a third end of the first switch Q2 is connected to a second end of the power supply 104.

[0107] The third fixed power consumption unit 102 includes: a first switch Q3 and a first resistor R3. The GPIO_3 pin is connected to a first end of the first switch Q3, a second end of the first switch Q3 is connected to a first end of the first resistor R3, a second end of the first resistor R3 is connected to a first end of the power supply 104, and a third end of the first switch Q3 is connected to a second end of the power supply 104.

[0108] The fourth fixed power consumption unit 102 includes: a first switch Q4 and a first resistor R4. The GPIO_4 pin is connected to a first end of the first switch Q4, a second end of the first switch Q4 is connected to a first end of the first resistor R4, a second end of the first resistor R4 is connected to a first end of the power supply 104, and a third end of the first switch Q4 is connected to a second end of the power supply 104.

[0109] The fifth fixed power consumption unit 102 includes: a first switch Q5 and a first resistor R5. The GPIO_5 pin is connected to a first end of the first switch Q5, a second end of the first switch Q5 is connected to a first end of the first resistor R5, a second end of the first resistor R5 is connected to a first end of the power supply 104, and a third end of the first switch Q5 is connected to a second end of the power supply 104.

[0110] The variable power consumption unit 103 includes: a second switch Q6 and a second resistor R6. The PWM pin is connected to a first end of the second switch Q6, a second end of the second switch Q6 is connected to a first end of the second resistor R6, a second end of the second resistor R6 is connected to a first end of the power supply 104, and a third end of the second switch Q6 is connected to a second end of the power supply 104.

[0111] The control unit 101 may control the on-time of the second switch according to a PWM signal that matches the power consumption required by the variable power consumption unit 103. For example, the duty cycle of the PWM signal may be calculated according to the following formula:

[0112] Duty cycle = P 可变功耗单元 / P 满负荷功耗

[0113] P 可变功耗单元 Indicates the power consumption that the variable power consumption unit 103 needs to generate.

[0114] P 满负荷功耗 is the full load power consumption of the variable power consumption unit 103, that is, the power consumption when the variable power consumption unit 103 is fully turned on within a time period.

[0115] The turn-on time length of the second switch within a time period T may be: duty cycle*T.

[0116] Continuing with the example that the power consumption of the five fixed power consumption units 102 is all 6W, and the full load power consumption of the variable power consumption unit 103 is 10W. If the target power consumption value is 20W, the number N of the fixed power consumption units 102 is 3, the power consumption P1 is 18W, the power consumption required to be generated by the variable power consumption unit 103 is 2W, and the duty cycle of the PWM signal is 20%.

[0117] For example, the target power consumption unit is composed of a first fixed power consumption unit 102 , a second fixed power consumption unit 102 , a third fixed power consumption unit 102 and a variable power consumption unit 103 .

[0118] The control unit 101 sends a high-level signal to the first switch Q1, the first switch Q2 and the first switch Q3, the first switch Q1, the first switch Q2 and the first switch Q3 are turned on, the first fixed power consumption unit 102, the second fixed power consumption unit 102 and the third fixed power consumption unit 102 are connected to the loop of the power supply 104, and the first fixed power consumption unit 102, the second fixed power consumption unit 102 and the third fixed power consumption unit 102 generate 6W of power consumption respectively.

[0119] The control unit 101 sends a low level signal to the first switch Q4 and the first switch Q5, the first switch Q4 and the first switch Q5 are turned off, the fourth fixed power consumption unit 102 and the fifth fixed power consumption unit 102 are disconnected from the loop of the power supply 104, and the fourth fixed power consumption unit 102 and the fifth fixed power consumption unit 102 do not generate power consumption.

[0120] In a time period T, the control unit 101 sends a high level signal to the second switch Q6 within a time period of 0-T / 5, the variable power consumption unit 103 is turned on, and power consumption is generated. The control unit 101 sends a low level signal to the second switch Q6 within a time period of T / 5-T, the variable power consumption unit 103 is turned off, and power consumption is stopped. The variable power consumption unit 103 generates 2W of power consumption in a time period T.

[0121] Below Figure 5The power consumption of the power consumption control circuit 100 of the electronic device shown and the equivalent power consumption are illustrated by a dotted line.

[0122] Figure 6 A schematic diagram of power consumption and equivalent power consumption provided by an embodiment of the present application is shown in dashed lines. Figure 6 As shown, the horizontal axis represents time t, and the PWM signal controls the variable power consumption unit 103 to be turned on or off at different times t.

[0123] The vertical axis represents the power consumption P, that is, the power consumption generated by the target power consumption unit. When the target power consumption unit is turned on, it is considered that power consumption is generated, and when the target power consumption unit is turned off, power consumption stops being generated.

[0124] P1 represents the total power consumption value generated by the fixed power consumption unit 102 in the target power consumption unit, and this value does not change with time t within a time period T.

[0125] P2 represents the full load power consumption generated by the target power consumption unit, that is, the full load power consumption of the fixed power consumption unit 102 and the variable power consumption unit 103 in the target power consumption unit.

[0126] The following is a schematic description taking the power consumption generated by the target power consumption unit within a time period T as an example.

[0127] Continuing with the example that the power consumption of the five fixed power consumption units 102 is all 6W, and the full load power consumption of the variable power consumption unit 103 is 10W. If the target power consumption value is 20W, the number N of the fixed power consumption units 102 is 3, the power consumption P1 is 18W, the power consumption P2 is 28W, the power consumption generated by the variable power consumption unit 103 is 2W, and the duty cycle of the PWM signal is 20%.

[0128] refer to Figure 6 The solid line between the two points (0, P2) and (T / 5, P2) and the solid line between the two points (T / 5, P1) and (T, P1) represent the actual power consumption generated by the target power consumption unit at different times t.

[0129] The area enclosed by the four points (0, 0), (0, P2), (T, P1), and (T, 0) represents the equivalent power consumption of the target power consumption unit within a time period T, that is, the target power consumption value. Figure 6 An example is given in which the equivalent power consumption is the average power consumption within a time period T.

[0130] The dotted line between the two points (0, P2) and (T, P1) represents the equivalent power consumption dotted line of the target power consumption unit. Figure 6 The dotted line of equivalent power consumption within a time period T is taken as an example for schematic description.

[0131] Figure 5The power consumption control circuit 100 shown in the figure uses a combination of a fixed power consumption unit 102 and a variable power consumption unit 103. The control unit 101 controls the fixed power consumption unit 102 in the target power consumption unit to turn on, and controls the variable power consumption unit 103 to turn on or off at different times t through a PWM signal, so that the target power consumption unit can generate a target power consumption value within a time period T. Within a time period T, the power consumption amplitude actually generated by the target power consumption unit fluctuates between 0-10W, and the actual equivalent power consumption dotted line is also a sawtooth shape with a smaller amplitude, and the equivalent power consumption dotted line is smoother.

[0132] In summary, the power consumption control circuit 100 provided in the embodiment of the present application determines the target power consumption unit according to the target power consumption value by setting a fixed power consumption unit 102 and a variable power consumption unit 103 in the circuit. The control unit 101 controls the fixed power consumption unit 102 in the target power consumption unit to turn on, and sends a PWM signal to the variable power consumption unit 103. When the PWM signal is at a high level, the variable power consumption unit 103 is turned on, and when the PWM signal is at a low level, the variable power consumption unit 103 is turned off. The actual power consumption variation range is the power consumption variation range of the variable power consumption unit 103, thereby reducing the power consumption variation range and improving the smoothness of the equivalent power consumption dotted line.

[0133] The present application also provides a power consumption control device, which includes the aforementioned power consumption control circuit 100, and is used to control power consumption in the aforementioned manner.

[0134] The present application also provides an electronic device, which includes the aforementioned power consumption control circuit 100, and is used to control power consumption in the aforementioned manner.

[0135] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0136] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A power consumption control circuit, characterized in that: The power consumption control circuit comprises: a control unit, at least one fixed power consumption unit, and a variable power consumption unit; The control unit is connected to the first end of the fixed power consumption unit and the first end of the variable power consumption unit respectively; the second end of the fixed power consumption unit and the second end of the variable power consumption unit are both connected to the first end of the power supply; the third end of the fixed power consumption unit and the third end of the variable power consumption unit are both connected to the second end of the power supply; The control unit is used to determine a target power consumption unit from at least one of the fixed power consumption unit and the variable power consumption unit according to a target power consumption value and the power consumption of the fixed power consumption unit, and control the target power consumption unit to be turned on so as to conduct a loop between the power supply and the target power consumption unit.

2. The circuit according to claim 1, characterized in that There are multiple fixed power consumption units, and the power consumption of the multiple fixed power consumption units is the same.

3. The circuit according to claim 1, characterized in that The fixed power consumption unit comprises: a first switch and a first load; The first end of the first switch is the first end of the fixed power consumption unit, the second end of the first switch is connected to the first end of the first load, the second end of the first load is the second end of the fixed power consumption unit, and the third end of the first switch is the third end of the fixed power consumption unit; Or, the first end of the first switch is the first end of the fixed power consumption unit, the second end of the first switch is the second end of the fixed power consumption unit, the third end of the first switch is connected to the first end of the first load, and the second end of the first load is the third end of the fixed power consumption unit; The control unit is specifically used to control the first switch to be in a normally closed state or a normally open state; wherein, when the first switch is in the normally closed state, the power supply is connected to the circuit of the fixed power consumption unit, and when the first switch is in the normally open state, the power supply is disconnected from the circuit of the fixed power consumption unit.

4. The circuit according to claim 3, characterized in that The variable power consumption unit comprises: a second switch; a first end of the second switch is a first end of the variable power consumption unit; The control unit is specifically configured to control the conduction time of the second switch according to a pulse width modulation signal that matches the power consumption required to be achieved by the variable power consumption unit.

5. The circuit according to claim 4, characterized in that The second end of the second switch is the second end of the variable power consumption unit, and the third end of the second switch is the third end of the fixed power consumption unit.

6. The circuit according to claim 4, characterized in that The variable power consumption unit further includes: a second load; The second end of the second switch is connected to the first end of the second load, the second end of the second load is the second end of the variable power consumption unit, and the third end of the second switch is the third end of the variable power consumption unit; Or, the second end of the second switch is the second end of the variable power consumption unit, the third end of the second switch is connected to the first end of the second load, and the second end of the second load is the third end of the variable power consumption unit.

7. The circuit according to claim 6, characterized in that The first load and the second load each include at least one resistor connected in series.

8. The circuit according to claim 1, characterized in that The power consumption control circuit further includes: an input unit; the control unit is connected to the input unit; The control unit is further configured to receive the target power consumption value sent by the input unit.

9. A power consumption control device, characterized in that: The power consumption control device comprises: a power consumption control circuit as claimed in any one of claims 1-8.

10. An electronic device, characterized in that: The electronic device comprises: a power consumption control circuit as described in any one of claims 1-8.

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