CN112532045A - Active interference suppression method - Google Patents
Active interference suppression method Download PDFInfo
- Publication number
- CN112532045A CN112532045A CN202011309688.3A CN202011309688A CN112532045A CN 112532045 A CN112532045 A CN 112532045A CN 202011309688 A CN202011309688 A CN 202011309688A CN 112532045 A CN112532045 A CN 112532045A
- Authority
- CN
- China
- Prior art keywords
- load
- circuit
- current source
- power supply
- interference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001629 suppression Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000001052 transient effect Effects 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is DC characterised by reference voltage circuitry, e.g. soft start, remote shutdown
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from DC input or output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Abstract
本发明公开了一种有源干扰抑制方法，属于直流电源领域，采用三级级联处理方式，前级为LC滤波器电路、中间级包括可调电流源和反馈控制回路、后级为有源升压电路。本发明采用开关型有源恒流源噪声抑制电路，利用可调电流源将干扰较大的低频强暂态干扰负载转换为恒流源特性负载，将脉动变化的负载转换为恒定平均功率的负载，从而降低负载干扰源对输入电源的影响，有效提高电源在大功率脉冲负载下对噪声信号的抑制能力，在对电源输出纹波要求较高的场合具有较高的应用价值。
The invention discloses an active interference suppression method, which belongs to the field of direct current power supply and adopts a three-stage cascade processing method. boost circuit. The invention adopts a switch-type active constant current source noise suppression circuit, uses an adjustable current source to convert a low-frequency strong transient interference load with large interference into a constant current source characteristic load, and converts a pulsating load into a constant average power load. , thereby reducing the influence of the load interference source on the input power supply, effectively improving the power supply's ability to suppress noise signals under high-power pulse loads, and having high application value in occasions where the output ripple of the power supply is high.
Description
技术领域technical field
本发明属于直流电源领域，具体涉及一种有源干扰抑制方法。The invention belongs to the field of DC power supplies, and in particular relates to an active interference suppression method.
背景技术Background technique
在直流供电领域，纹波、噪声对微弱信号检测、射频放大器、A/D变换等噪声敏感电路工作会产生严重的影响，在设计供电电源时要尽量减小供电电源的纹波、噪声，同时负载也会对电源纹波、噪声产生很大的影响，如负载为直流风机、伺服电机、高功率开关变换器等电路。快速变化或脉动成分较大的负载会使原本纯净的电源出现瞬态偏移，导致电源出现新的电压波动和频率杂散，其纹波、噪声显著增大，进而影响噪声敏感电路工作。因此，有效抑制高功率脉冲和瞬变负载对电源的干扰也变得越来越重要。In the field of DC power supply, ripple and noise will have a serious impact on the operation of noise-sensitive circuits such as weak signal detection, RF amplifier, and A/D conversion. When designing a power supply, the ripple and noise of the power supply should be minimized. The load will also have a great impact on the power supply ripple and noise. For example, the load is a circuit such as a DC fan, a servo motor, and a high-power switching converter. Loads with fast changes or large pulsating components will cause transient shifts in the original pure power supply, resulting in new voltage fluctuations and frequency spurs in the power supply, and the ripple and noise will increase significantly, thereby affecting the operation of noise-sensitive circuits. Therefore, it is becoming more and more important to effectively suppress the interference of high-power pulses and transient loads to the power supply.
传统干扰抑制采用LC低通滤波器和线性稳压的方式。LC低通滤波器方法利用电感及电容组成频率选择电路，允许低于截止频率的有用信号通过而阻断或衰减高于截止频率的干扰，对高频干扰的处理比较有效。而直流风机、步进电机等强暂态干扰负载，其干扰频率一般在10Hz至400Hz范围，采用LC低通滤波器抑制干扰，滤波器截止频率很低，滤波电感与电容元件需要的参数值大，将导致滤波器的体积较大，不能满足小型化的要求。此外，滤波器本身的电阻及介质损耗也不利于高功率的处理，故利用LC低通滤波器以滤除电源中的干扰，作用效果有限。采用线性稳压方式抑制干扰，具有噪声抑制比高、响应速度快等优点，但由于其转换效率低，当负载电流变化率较高时，受其增益带宽积和压摆率的限制，输出电压会滞后于负载电流的变化，容易产生输出电压过冲现象和短期震荡现象，无法实现大功率负载条件下干扰的有效抑制。为了有效抑制大功率脉冲负载对电源的干扰，需要采用新的方法，将脉动变化的负载转换为恒定平均功率的负载，降低负载干扰源对输入电源的影响，提高电路干扰抑制能力。Traditional interference suppression adopts LC low-pass filter and linear voltage regulation. The LC low-pass filter method uses inductors and capacitors to form a frequency selection circuit, allowing useful signals below the cut-off frequency to pass through and blocking or attenuating interference higher than the cut-off frequency, which is more effective in dealing with high-frequency interference. For strong transient interference loads such as DC fans and stepper motors, the interference frequency is generally in the range of 10Hz to 400Hz. The LC low-pass filter is used to suppress the interference. , which will lead to a larger volume of the filter, which cannot meet the requirements of miniaturization. In addition, the resistance and dielectric loss of the filter itself are not conducive to the processing of high power, so the LC low-pass filter is used to filter out the interference in the power supply, and the effect is limited. The linear voltage regulation method is used to suppress interference, which has the advantages of high noise suppression ratio and fast response speed. However, due to its low conversion efficiency, when the load current change rate is high, the output voltage is limited by its gain bandwidth product and slew rate. It will lag behind the change of load current, which is prone to output voltage overshoot and short-term oscillation, and cannot effectively suppress interference under high-power load conditions. In order to effectively suppress the interference of high-power pulse loads on the power supply, a new method is required to convert the pulsating load into a constant average power load, reduce the influence of the load interference source on the input power supply, and improve the circuit interference suppression capability.
发明内容SUMMARY OF THE INVENTION
针对现有技术中存在的上述问题，本发明提供了一种有源干扰抑制方法，采用开关型有源恒流源噪声抑制电路，利用可调电流源将干扰较大的低频强暂态干扰负载转换为恒流源特性负载，将脉动变化的负载转换为恒定平均功率的负载，从而降低负载干扰源对输入电源的影响，有效提高电源在大功率脉冲负载下对噪声信号的抑制能力。In view of the above problems existing in the prior art, the present invention provides an active interference suppression method, which adopts a switch-type active constant current source noise suppression circuit, and uses an adjustable current source to suppress the low-frequency strong transient interference load with large interference. It is converted into a constant current source characteristic load, and the pulsating load is converted into a constant average power load, thereby reducing the influence of the load interference source on the input power supply, and effectively improving the power supply's ability to suppress noise signals under high-power pulse loads.
为了实现上述目的，本发明采用如下技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种有源干扰抑制方法，采用三级级联电路，包括前级、中间级和后级；其中，An active interference suppression method adopts a three-stage cascade circuit, including a pre-stage, an intermediate stage and a post-stage; wherein,
前级为LC滤波器电路，连接电源Vin和可调电流源输入端；The front stage is an LC filter circuit, which is connected to the power supply Vin and the input end of the adjustable current source;
中间级为有源抑制电路，采用开关型可调电流源方式，包括可调电流源和反馈控制回路，连接LC滤波器输出端和后级稳压器输入端；The intermediate stage is an active suppression circuit, which adopts a switch-type adjustable current source method, including an adjustable current source and a feedback control loop, and is connected to the output end of the LC filter and the input end of the post-stage regulator;
后级为有源升压电路，连接可调电流源输出端和负载；The latter stage is an active boost circuit, which is connected to the output end of the adjustable current source and the load;
针对大功率脉冲负载对电源的干扰，采用开关型可调电流源方式，将大功率脉冲负载平滑为恒定电流或恒定平均功率的负载，降低瞬变负载对电源的干扰，再根据负载电压的需求，将母线电压Vbus提升到需要的电压等级。In view of the interference of high-power pulse loads on the power supply, the switch-type adjustable current source method is adopted to smooth the high-power pulse load into a load of constant current or constant average power, reducing the interference of transient loads to the power supply, and then according to the demand of the load voltage. , raise the bus voltage Vbus to the required voltage level.
优选地，所述LC滤波器电路，采用简易的无源电路，抑制负载产生的高频纹波噪声。Preferably, the LC filter circuit adopts a simple passive circuit to suppress the high-frequency ripple noise generated by the load.
优选地，所述可调电流源提供基于电源功率输出的电压输出和电流输出；反馈控制回路连接到可调电流源的输出端，将电压输出和参考电压进行比较，提供误差值给可调电流源，调节电流恒定输出。Preferably, the adjustable current source provides a voltage output and a current output based on the power output of the power supply; a feedback control loop is connected to the output terminal of the adjustable current source, and the voltage output is compared with a reference voltage to provide an error value to the adjustable current source, regulates the current constant output.
优选地，所述可调恒流源电路，将脉冲负载转换为恒定平均电流和固定输出电压的负载形式，将脉动变化的负载转换为恒定平均功率的负载。Preferably, the adjustable constant current source circuit converts the pulsed load into a load with constant average current and fixed output voltage, and converts the pulsating load into a load with constant average power.
优选地，所述有源升压电路中，升压稳压器采用开关型BOOST升压电路。Preferably, in the active boost circuit, the boost regulator adopts a switch-type BOOST boost circuit.
优选地，Preferably,
LC滤波器电路由小参数滤波电感元件L1和电容C1组成；The LC filter circuit is composed of small parameter filter inductance element L1 and capacitor C1;
有源抑制电路由同步降压型DC/DC控制器TPS62110(N1)和外围电路构建可调电流源和反馈控制回路，外围电路包括电感元件L2、电阻器R1-R3、R5和R6，电容器C2、C4、C7和C8，TPS62110(N1)芯片开关频率设置为1MHz，内部集成电压和电流基准；The active suppression circuit consists of the synchronous step-down DC/DC controller TPS62110 (N1) and the peripheral circuit to construct an adjustable current source and feedback control loop. The peripheral circuit includes an inductive element L2, resistors R1-R3, R5 and R6, and a capacitor C2 , C4, C7 and C8, TPS62110 (N1) chip switching frequency is set to 1MHz, internal integrated voltage and current reference;
有源升压电路由开关控制器LM2733YMF(N2)和外围电路构成BOOST升压变换器，外围电路包括电感元件L3，电阻器R4和R7，电容器C5和C6，LM2733YMF(N2)芯片开关频率设置为0.6MHz。The active boost is composed of the switch controller LM2733YMF(N2) and the peripheral circuit to form a BOOST boost converter. The peripheral circuit includes the inductance element L3, the resistors R4 and R7, the capacitors C5 and C6, and the LM2733YMF(N2) chip switching frequency is set to 0.6MHz.
本发明所带来的有益技术效果：Beneficial technical effects brought by the present invention:
本发明采用一种有源干扰抑制电路，前级为LC低通滤波器，采用简易的无源电路，可抑制负载产生的高频纹波噪声，由于滤波器截止频率较高，可采用较小参数的滤波电感与电容元件，利于实现小型化的要求；中间级为有源抑制电路，采用开关型可调电流源方式，可将脉动变化的负载特性转换为恒定平均功率的负载，可有效降低大功率脉冲负载对电源的干扰，特别是中低频段的强干扰成分，并使电路保持较高的转换效率；后级为有源升压电路，可将输出电压转换为负载需要的正常电压，保证负载正常工作。这样，通过有针对性的对高低频干扰进行处理，可获得全频段高效率干扰抑制效果。The invention adopts an active interference suppression circuit, the front stage is an LC low-pass filter, and a simple passive circuit is used to suppress the high-frequency ripple noise generated by the load. The filter inductance and capacitance elements of the parameters are conducive to the realization of miniaturization requirements; the intermediate stage is an active suppression circuit, which adopts a switch-type adjustable current source method, which can convert the pulsating load characteristics into a constant average power load, which can effectively reduce The interference of high-power pulse loads to the power supply, especially the strong interference components in the middle and low frequency bands, makes the circuit maintain a high conversion efficiency; the latter stage is an active boost circuit, which can convert the output voltage to the normal voltage required by the load, Make sure the load works normally. In this way, through the targeted processing of high and low frequency interference, the effect of high-efficiency interference suppression in the whole frequency band can be obtained.
附图说明Description of drawings
图1是本发明的电路原理框图；Fig. 1 is the circuit principle block diagram of the present invention;
图2是本发明的实施例原理图；2 is a schematic diagram of an embodiment of the present invention;
图3是本发明直接连接电源时测量的纹波噪声；Fig. 3 is the ripple noise measured when the present invention is directly connected to the power supply;
图4是接入本发明电路测量的纹波噪声。Fig. 4 is the ripple noise measured by inserting the circuit of the present invention.
具体实施方式Detailed ways
下面结合附图以及具体实施方式对本发明作进一步详细说明：The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:
本发明采用一种有源干扰抑制电路，介于电源和干扰负载之间。电路包括一个与电源相连的降压式可调电流源。可调电流源可提供基于电源功率输出的电压输出和电流输出。其反馈控制电路连接到可调电流源的输出端，将电压输出和参考电压进行比较，提供误差值给可调电流源，调节电流恒定输出，这样，通过可调恒流源电路，将脉冲负载转换为恒定平均电流和固定输出电压的负载形式，将脉动变化的负载转换为恒定平均功率的负载，因而可有效减小负载电流快速变化产生输出电压过冲和短期震荡现象。为减小高频干扰，前级增加LC低通滤波器；为保证负载对供电电压的要求，后级增加一级有源升压电路，将输出电压变换提高到至负载需要的供电电压，保证负载正常工作。The invention adopts an active interference suppression circuit, which is between the power supply and the interference load. The circuit includes a step-down adjustable current source connected to the power supply. The adjustable current source provides voltage output and current output based on the power output of the mains. Its feedback control circuit is connected to the output end of the adjustable current source, compares the voltage output with the reference voltage, provides the error value to the adjustable current source, and adjusts the current constant output. In this way, through the adjustable constant current source circuit, the pulse load is It is converted into a load with constant average current and fixed output voltage, and the pulsating load is converted into a load with constant average power, which can effectively reduce the output voltage overshoot and short-term oscillation caused by the rapid change of the load current. In order to reduce high-frequency interference, an LC low-pass filter is added at the front stage; in order to ensure the load’s requirements for the power supply voltage, an active boost circuit is added at the rear stage to transform the output voltage to the power supply voltage required by the load, ensuring that The load works fine.
从图1所示电路原理图中可以看出，本发明采用三级级联处理方式，前级为LC滤波器电路，连接电源Vin和可调电流源输入，用于抑制较高频率的干扰噪声。由于电路结构简单，同时因为抑制的是较高频率成分的干扰噪声，LC低通滤波器的截止频率可以设置很高，因此滤波电感与电容元件参数值不需要太大，所需的滤波电感与电容元件的体积也较小，有利于电路的小型化设计。It can be seen from the schematic diagram of the circuit shown in Fig. 1 that the present invention adopts a three-stage cascade processing method, and the front stage is an LC filter circuit, which is connected to the power supply Vin and the input of an adjustable current source to suppress higher frequency interference noise . Due to the simple circuit structure and the interference noise of higher frequency components is suppressed, the cut-off frequency of the LC low-pass filter can be set very high, so the parameter values of the filter inductance and capacitive element do not need to be too large, and the required filter inductance and The volume of the capacitive element is also small, which is beneficial to the miniaturized design of the circuit.
中间级为本发明的关键部分，连接LC滤波器输出和后级稳压器输入，包括可调电流源和反馈控制回路。可调电流源根据负载功率提供输出电流，对应输入端为电流Iin1，利用电流源阻抗较大的特性，将负载和输入电源隔离开来。当负载快速变化时，电流源输入端的电流Iin1波动很小，从而有效抑制脉动变化的负载干扰。功率变换采用开关型BUCK降压电路，控制方式为CC/CV，利用高频开关变换方式将电压调节到较低的电压等级，可实现较高的转换效率。使用滤波电容C1使母线电压Vbus保持相对稳定。反馈控制回路将输出电压与参考电压比较，经误差放大后获得误差值，控制可调电流源中开关管的导通时间，进而调节电流输出。反馈控制回路通过PID控制，设计成慢调节系统进行平衡，在允许母线电压Vbus有一定程度瞬变的前提下，可将脉动变化的负载转换为恒定电流、恒定平均功率的负载。这样，通过可调电流源，将大功率脉冲负载平滑为恒定电流或恒定平均功率的负载，可有效降低高功率脉冲和瞬变负载对前端电源的干扰。The intermediate stage is the key part of the present invention, connecting the output of the LC filter and the input of the post-stage regulator, including an adjustable current source and a feedback control loop. The adjustable current source provides the output current according to the load power, and the corresponding input terminal is the current Iin1, and the load and the input power supply are isolated by using the characteristic of the large impedance of the current source. When the load changes rapidly, the current Iin1 at the input end of the current source fluctuates very little, thereby effectively suppressing the load interference of pulsating changes. The power conversion adopts a switch-type BUCK step-down circuit, and the control method is CC/CV. The high-frequency switching conversion method is used to adjust the voltage to a lower voltage level, which can achieve higher conversion efficiency. Use the filter capacitor C1 to keep the bus voltage Vbus relatively stable. The feedback control loop compares the output voltage with the reference voltage, obtains the error value after error amplification, controls the on-time of the switch tube in the adjustable current source, and then adjusts the current output. The feedback control loop is controlled by PID and is designed as a slow-adjusting system for balance. Under the premise that the bus voltage Vbus is allowed to have a certain degree of transient, the pulsating load can be converted into a load with constant current and constant average power. In this way, through the adjustable current source, the high-power pulse load is smoothed into a load of constant current or constant average power, which can effectively reduce the interference of high-power pulse and transient loads on the front-end power supply.
后级为升压稳压器，连接可调电流源输出和负载，根据负载电压的需求，将母线电压Vbus提升到需要的电压等级。为提高转换效率，采用开关型BOOST升压电路，利用BOOST电路对输入电压的适应性调节能力，获得稳定的输出电压，从而消除中间级母线电压Vbus上的瞬变引起的不利影响，保证负载电路的正常工作。The latter stage is a boost regulator, which is connected to the output of the adjustable current source and the load, and boosts the bus voltage Vbus to the required voltage level according to the demand of the load voltage. In order to improve the conversion efficiency, a switch-type BOOST boost circuit is adopted, and the adaptability of the BOOST circuit to the input voltage is used to obtain a stable output voltage, thereby eliminating the adverse effects caused by the transient on the intermediate bus voltage Vbus and ensuring the load circuit. of normal work.
如图2所示是本发明的实施例原理图，本实施例前端供电电源为+12V，负载为12V/0.7A直流风机，在换向切换期间电流冲击幅度为2A，换向频率为210Hz。前级由L1和C1组成低通滤波器，-3dB截止频率设计为100Hz，可有效抑制高频干扰。为缩小整个电路的体积，同时防止通过较大的电流时电感磁芯不饱和，小的电感值可使用小封装的贴片电感元件，L1电感值取为10uH，以此确定滤波电容C1的容值。中间级采用同步降压型DC/DC控制器TPS62110(N1)和外围电路构建可调电流源和反馈控制回路，芯片开关频率为1MHz，内部集成电压和电流基准，可实现良好的CC/CV环路控制，电路将电压由+12V调节到+9V，为平衡瞬变电流，环路带宽设计为50Hz，可有效平滑脉冲负载。后级采用开关控制器LM2733YMF(N2)和外围电路构成BOOST升压变换器，将芯片开关频率为0.6MHz，将电压由+9V提升至+12V，保证负载风机正常工作。Figure 2 is a schematic diagram of the embodiment of the present invention. In this embodiment, the front-end power supply is +12V, and the load is a 12V/0.7A DC fan. During the commutation switching, the current impulse amplitude is 2A, and the commutation frequency is 210Hz. The front stage consists of L1 and C1 to form a low-pass filter, and the -3dB cut-off frequency is designed to be 100Hz, which can effectively suppress high-frequency interference. In order to reduce the volume of the entire circuit and prevent the inductor core from not saturating when a large current is passed, a small-package chip inductor can be used for small inductance values. The inductance value of L1 is set to 10uH to determine the capacitance of the filter capacitor C1. value. The intermediate stage adopts synchronous step-down DC/DC controller TPS62110 (N1) and peripheral circuits to construct an adjustable current source and feedback control loop. The switching frequency of the chip is 1MHz, and the voltage and current reference are integrated inside, which can realize a good CC/CV loop. Circuit control, the circuit adjusts the voltage from +12V to +9V, in order to balance the transient current, the loop bandwidth is designed to be 50Hz, which can effectively smooth the pulse load. The latter stage adopts the switch controller LM2733YMF (N2) and the peripheral circuit to form a BOOST boost converter, the chip switching frequency is 0.6MHz, and the voltage is increased from +9V to +12V to ensure the normal operation of the load fan.
为验证干扰抑制效果，将风机负载直接连接电源和接入本发明电路测试数据进行对比，测试风机负载直接连接电源耗散功率为8.1W，接入本发明电路后耗散功率为8.8W，转换效率高达92％，可见采用开关变换方式可获得较高的转换效率。图3为风机负载直接连接电源时测量的纹波噪声、图4为接入本发明电路测量的纹波噪声，由图可见，没有干扰抑制电路时，电源的纹波噪声为500mV，指标较差；接入本发明的干扰抑制电路，电源纹波噪声为10mV以下，干扰抑制效果显著。In order to verify the interference suppression effect, the test data of the direct connection of the fan load to the power supply and the circuit of the invention are compared. The test data of the fan load directly connected to the power supply is 8.1W, and the dissipation power after connecting to the circuit of the invention is 8.8W. The efficiency is as high as 92%, and it can be seen that higher conversion efficiency can be obtained by adopting the switching conversion method. Figure 3 shows the ripple noise measured when the fan load is directly connected to the power supply, and Figure 4 shows the ripple noise measured when the circuit of the present invention is connected. It can be seen from the figure that when there is no interference suppression circuit, the ripple noise of the power supply is 500mV, and the index is poor ; Access the interference suppression circuit of the present invention, the power supply ripple noise is below 10mV, and the interference suppression effect is remarkable.
本发明针对大功率脉冲负载对电源的干扰，采用开关型可调电流源方式，将大功率脉冲负载平滑为恒定电流或恒定平均功率的负载，可有效降低瞬变负载对电源的干扰，并使电路保持较高的转换效率，在对电源输出纹波要求较高的场合具有较高的应用价值。Aiming at the interference of the high-power pulse load to the power supply, the invention adopts the switch-type adjustable current source mode to smooth the high-power pulse load into a load of constant current or constant average power, which can effectively reduce the interference of the transient load to the power supply, and make the The circuit maintains a high conversion efficiency, and has high application value in occasions where the output ripple of the power supply is high.
当然，上述说明并非是对本发明的限制，本发明也并不仅限于上述举例，本技术领域的技术人员在本发明的实质范围内所做出的变化、改型、添加或替换，也应属于本发明的保护范围。Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also belong to the present invention. the scope of protection of the invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309688.3A CN112532045A (en) | 2020-11-20 | 2020-11-20 | Active interference suppression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309688.3A CN112532045A (en) | 2020-11-20 | 2020-11-20 | Active interference suppression method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112532045A true CN112532045A (en) | 2021-03-19 |
Family
ID=74981932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011309688.3A Pending CN112532045A (en) | 2020-11-20 | 2020-11-20 | Active interference suppression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112532045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545839A (en) * | 2022-03-08 | 2022-05-27 | 大唐青岛西海岸热力有限公司 | Intelligent control system and control method for thermal equipment |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391976A (en) * | 1993-07-28 | 1995-02-21 | At&T Corp. | Power factor control arrangement for an OLS based on quarter cycle averaged power flow |
| US6150802A (en) * | 1998-08-28 | 2000-11-21 | Hewlett-Packard Company | Adjustable voltage controlled DC to DC switcher current source |
| CN103138573A (en) * | 2013-02-28 | 2013-06-05 | 上海新进半导体制造有限公司 | Voltage-reduction-type switch power supply and control circuit thereof |
| US20130221869A1 (en) * | 2012-02-23 | 2013-08-29 | Maxim Integrated Products, Inc. | Method and apparatus for active ripple cancelation |
| CN103731033A (en) * | 2013-12-19 | 2014-04-16 | 山东艾诺仪器有限公司 | Wide-range DC power supply with constant power output characteristic |
| CN105281591A (en) * | 2015-11-26 | 2016-01-27 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and control method of power converter |
| CN205039695U (en) * | 2015-09-01 | 2016-02-17 | 厦门麦普电光源有限公司 | Power supply circuit |
| CN205490187U (en) * | 2016-01-11 | 2016-08-17 | 深圳市中科电气设备有限公司 | Ring -opening high voltage power supply |
| CN105991053A (en) * | 2016-05-19 | 2016-10-05 | 上海莱狮半导体科技有限公司 | Switching power supply system used for constant current driving |
| CN107453611A (en) * | 2017-08-14 | 2017-12-08 | 浙江大学 | Dc source noise modulate circuit based on constant-current source |
| CN108445494A (en) * | 2018-04-13 | 2018-08-24 | 深圳臻迪信息技术有限公司 | Ultrasonic wave transmitting circuit and Ultrasonic ranging device |
| US10200050B1 (en) * | 2018-02-24 | 2019-02-05 | Integrated Device Technology, Inc. | Auto-phase-shifting and dynamic on time control current balancing multi-phase constant on time buck converter |
| US10218264B1 (en) * | 2014-04-02 | 2019-02-26 | Raytheon Company | Method of eliminating power converter input power variations and minimizing energy storage capacitor requirements for a pulsed load system |
| US10666128B1 (en) * | 2019-06-06 | 2020-05-26 | Eric Seungwoo Choi | Methods, systems, apparatuses and devices for regulating an output of a switched mode power supply circuit configured to provide electric power to a load |
-
2020
- 2020-11-20 CN CN202011309688.3A patent/CN112532045A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391976A (en) * | 1993-07-28 | 1995-02-21 | At&T Corp. | Power factor control arrangement for an OLS based on quarter cycle averaged power flow |
| US6150802A (en) * | 1998-08-28 | 2000-11-21 | Hewlett-Packard Company | Adjustable voltage controlled DC to DC switcher current source |
| US20130221869A1 (en) * | 2012-02-23 | 2013-08-29 | Maxim Integrated Products, Inc. | Method and apparatus for active ripple cancelation |
| CN103138573A (en) * | 2013-02-28 | 2013-06-05 | 上海新进半导体制造有限公司 | Voltage-reduction-type switch power supply and control circuit thereof |
| CN103731033A (en) * | 2013-12-19 | 2014-04-16 | 山东艾诺仪器有限公司 | Wide-range DC power supply with constant power output characteristic |
| US10218264B1 (en) * | 2014-04-02 | 2019-02-26 | Raytheon Company | Method of eliminating power converter input power variations and minimizing energy storage capacitor requirements for a pulsed load system |
| CN205039695U (en) * | 2015-09-01 | 2016-02-17 | 厦门麦普电光源有限公司 | Power supply circuit |
| CN105281591A (en) * | 2015-11-26 | 2016-01-27 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and control method of power converter |
| CN205490187U (en) * | 2016-01-11 | 2016-08-17 | 深圳市中科电气设备有限公司 | Ring -opening high voltage power supply |
| CN105991053A (en) * | 2016-05-19 | 2016-10-05 | 上海莱狮半导体科技有限公司 | Switching power supply system used for constant current driving |
| CN107453611A (en) * | 2017-08-14 | 2017-12-08 | 浙江大学 | Dc source noise modulate circuit based on constant-current source |
| US10200050B1 (en) * | 2018-02-24 | 2019-02-05 | Integrated Device Technology, Inc. | Auto-phase-shifting and dynamic on time control current balancing multi-phase constant on time buck converter |
| CN108445494A (en) * | 2018-04-13 | 2018-08-24 | 深圳臻迪信息技术有限公司 | Ultrasonic wave transmitting circuit and Ultrasonic ranging device |
| US10666128B1 (en) * | 2019-06-06 | 2020-05-26 | Eric Seungwoo Choi | Methods, systems, apparatuses and devices for regulating an output of a switched mode power supply circuit configured to provide electric power to a load |
Non-Patent Citations (2)
| Title |
|---|
| "【选型】可替换TI LM2733的BOOST芯片SGM6607助力光模块APD偏压电路设计，3-20V更款输入电压范围", pages 2, Retrieved from the Internet <URL:https://www.sekorm.com> * |
| "TPS6211x 17-V, 1.5-A, Synchronous Step-Down Converter", pages 11 - 17, Retrieved from the Internet <URL:https://b2b.baidu.com> * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545839A (en) * | 2022-03-08 | 2022-05-27 | 大唐青岛西海岸热力有限公司 | Intelligent control system and control method for thermal equipment |
| CN114545839B (en) * | 2022-03-08 | 2023-11-03 | 大唐青岛西海岸热力有限公司 | Intelligent control system and control method for thermodynamic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6980783B2 (en) | Apparatus and method of controlling low frequency load currents drawn from a DC source in a telecommunications system | |
| TW201315130A (en) | Three-phase rectification module, system thereof and harmonic suppression method | |
| US10116237B2 (en) | Inverter device and controlling method thereof | |
| CN117691887B (en) | A supercapacitor energy storage type high overload single-phase inverter circuit and control method thereof | |
| CN107453611B (en) | DC power supply noise conditioning circuit based on constant current source | |
| CN110112904A (en) | A kind of electromagnetic interference inhibition optimization method based on coupling inductance two-way converter | |
| CN112532045A (en) | Active interference suppression method | |
| CN111293869B (en) | A Method for Suppressing Second Harmonic Current of Inductor Current Feedback Path in Two-stage Inverter Power Supply | |
| CN109194326B (en) | Circuit for improving power supply rejection ratio of linear stabilized power supply | |
| CN108900098A (en) | A kind of the input power control system and control method of low frequency dynamic magnet power supply | |
| CN108880228A (en) | A kind of loop compensation system based on zero pole point tracking mechanism | |
| CN109510445B (en) | Inverter variable switching frequency modulation method considering inductance saturation characteristic | |
| CN100383692C (en) | High Efficiency Constant Current Source | |
| CN114825904A (en) | Direct current chopping power supply circuit with ripple noise suppression function | |
| CN107168445A (en) | A mobile terminal, DCDC power supply device and DCDC power supply circuit thereof | |
| JP4348969B2 (en) | Printed circuit board design method and printed circuit board | |
| US10340790B1 (en) | Integrated voltage correction using active bandpass clamp | |
| CN221283030U (en) | A power supply circuit in a static VAR compensation device | |
| CN111697802B (en) | Ripple wave eliminating circuit and switching power supply | |
| CN209994272U (en) | Ripple noise suppression device of switching power supply | |
| Liu et al. | Output double-line frequency ripple reduction method for high power density interleaved boost converters in power factor correction applications | |
| CN220775648U (en) | Power supply ripple suppression circuit | |
| CN111600469A (en) | A Finite Time Control Method Based on Buck Converter Current Limiting | |
| CN216564935U (en) | A low noise power chip design circuit | |
| CN222262505U (en) | Anti-harmonic AC-DC conversion circuit based on power factor correction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210319 |
|
| RJ01 | Rejection of invention patent application after publication |