A new proportional solenoid with hi - directional operation was presented to deal with the uni - directional low driving performance of conventional proportional solenoid , which worked on differential control of magnetic fields produced by permanent magnet and control coils 摘要針對(duì)傳統(tǒng)比例電磁鐵僅具備單向驅(qū)動(dòng)能力的不足,提出了一種耐高壓具有雙向驅(qū)動(dòng)能力的比例電磁鐵。
The silicon controlled trigger and it s auxiliary circuit could regulate simultaneously the controlling coil current of four series - parallel connected powers , so the purpose of making four powers output in step with was achieved , and the process of increasing progressively current after lighting arc and weakening current after going out arc was realized 利用可控硅觸發(fā)器及輔助電路可以同時(shí)調(diào)節(jié)串并聯(lián)在一起的四臺(tái)電源控制線圈的電流,達(dá)到四臺(tái)電源同步輸出的目的,并且實(shí)現(xiàn)了等離子弧噴涂引弧時(shí)電流遞增和熄弧時(shí)電流衰減的過(guò)程。
The bias magnetic field of the bias coil driven by bias current and small signal test current , results in the induced signal of the control coil . the terminal voltage of the control coil is detected by the test circuit . then the signal containing the information of rotor displacement is obtained , from which we can get the dc voltage signal proportional to the rotor displacement through half - wave rectification circuit and low pass circuit . this dc signal is put into a pid controller to get the control signal of the rotor displacement 偏置測(cè)試電路向偏置線圈輸入偏置電流和小信號(hào)測(cè)試電流,兩者產(chǎn)生的偏置磁場(chǎng)在控制線圈產(chǎn)生感應(yīng)信號(hào),檢測(cè)電路檢測(cè)控制線圈端電壓并提取含有轉(zhuǎn)子位移信息的電壓信號(hào),該信號(hào)經(jīng)半波整流電路和低通濾波電路后得到與轉(zhuǎn)子位移成正比例的直流信號(hào),再由pid控制器轉(zhuǎn)換為轉(zhuǎn)子位移的控制信號(hào),最后控制信號(hào)輸入功放電路產(chǎn)生控制電流,實(shí)現(xiàn)閉環(huán)控制。