1、激勵電壓幅值與頻率的影響 激勵電源電壓幅值的波動,會使線圈激勵磁場的磁通發(fā)生變化,直接影響輸出電勢。而頻率的波動,只要適當(dāng)?shù)剡x擇頻率,其影響不大。 2、溫度變化的影響 周圍環(huán)境溫度的變化,引起線圈及
分氣隙型和差動變壓器兩種。目前多采用螺管型差動變壓器。 其基本元件有銜鐵、初級線圈、次級線圈和線圈框架等。初級線圈作為差動變壓器激勵用,相當(dāng)于變壓器的原邊,而次級線圈由結(jié)構(gòu)尺寸和參數(shù)相同的兩個線圈反相
平衡臂為變壓器的兩個副邊,當(dāng)負(fù)載阻抗為無窮大時,流入工作臂的電流為 可見,銜鐵向不同方向移動時,產(chǎn)生的輸出電壓Usc大小相等、方向相反,即相位互差180º,可反映銜鐵移動的方向。但是,為了判別交流信號的
當(dāng)前各類家用功放,以甲乙類放大器為主,即使工作于甲類狀態(tài),廠家由于成本等原因,使放大器小功率時處于甲類,大功率時工作于甲乙類。而輸出級一旦轉(zhuǎn)為推挽工作,其開關(guān)失真總是難以避免。功放輸出端出現(xiàn)開關(guān)失真,
進線電源過壓及欠壓對開關(guān)電源造成的危害,主要表現(xiàn)在器件因承受的電壓及電流應(yīng)力超出正常使用的范圍而損壞,同時因電氣性能指標(biāo)被破壞而不能滿足要求。因此對輸入電源的上限和下限要有所限制,為此采用過壓、欠壓保
Knightrider lights for model carsThis simple circuit drives 6 LEDs in 'Knightrider scanner mode'. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version).Here's
脈寬調(diào)制直流電動機控制電路 Pulse Width Modulation DC Motor ControlOften, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter a
This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information (
紅外遙控器干擾電路 IR Remote Control JammerBy Carl Don't like your little brother's TV channel selection? Hate the volume your wife sets the stereo at? Want to just annoy someone? This circuit does
紅外線遠(yuǎn)程控制電路 Infa-Red Remote ControlI have received a number of emails requesting schematics for infa-red remotes. So here is one. This remote transmits a tone using an infa-red LED. This tone i
步進電機控制器電路 Stepper Motor ControllerI found this circuit in my files. I don't know where it came from, but it looks like I photocopied it from somewhere years ago. I have been told that it came
可控硅調(diào)光燈電路-TRIAC Light Dimmer This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Pl
電流放大電路一般常用的有幾種: 第1種:就是在喇叭下面裝個電阻做電流取樣,實際上反饋回去的還是電壓信號,是模擬的電流反饋,做的人最多,但是這個電路有缺陷的,,有2個方面的原因,1是他的輸出增益會隨
當(dāng)今IT產(chǎn)業(yè)的發(fā)展日新月異,對硬件設(shè)備的要求也越來越高,硬件設(shè)計師們面臨如何設(shè)計高速高密度PCB的難題。常言道,工欲善其事,必先利其器,這也是越來越多的設(shè)計師放棄低端的PCB設(shè)計工具,進而選擇Cadence等公司提供
我國新的《道路交通法》中,為維護道路交通安全,也明文規(guī)定了對駕駛速度、連續(xù)駕駛時間等。國外一些交通運輸發(fā)達國家也制定這方面的國家統(tǒng)一法規(guī)。疲勞駕駛是公路汽車駕駛特別是高速公路上的“隱形殺手”,據(jù)相關(guān)統(tǒng)