【摘要】：交流接觸器作為一種大規(guī)模使用在工農(nóng)業(yè)中的低壓電器,其在全國的使用量數(shù)以億計,耗電總量巨大。因此,為緩解能源緊張,構(gòu)建節(jié)能型社會,設(shè)計一款具有自主知識產(chǎn)權(quán)的交流接觸器節(jié)能芯片有重要意義。 本文根據(jù)交流接觸器“強電吸合,弱電吸持”的工作原理,設(shè)計出一款交流接觸器節(jié)能芯片ZDLX-1H(浙大綠芯1號)。以此芯片為核心的節(jié)能器與型號為CJ20-100A(220V)的交流接觸器配合使用,使交流接觸器能夠在很小導(dǎo)通角的直流方式下運行,不僅能夠節(jié)約電能,還能顯著的降低噪聲與溫升。節(jié)能器體積小,易于安裝,可以方便的對現(xiàn)有傳統(tǒng)的交流接觸器進行改造。此外,芯片ZDLX-1H還設(shè)計了過壓報警、欠壓報警和溫度報警功能,提高了節(jié)能器工作的安全性和可靠性。 主要工作以及創(chuàng)新點包括： (1)設(shè)計了智能脈寬調(diào)制(PWM)模式的節(jié)能器：當交流接觸器進入節(jié)能狀態(tài)之后,芯片輸出的脈寬能夠根據(jù)外電壓自動調(diào)節(jié),當外電路電壓過高或者過低時,節(jié)能器輸出脈寬(導(dǎo)通角)相應(yīng)減小或者增大,從而保證節(jié)能器中流過的電流在一個合適的范圍之內(nèi),使節(jié)能率保持穩(wěn)定。 (2)設(shè)計了低壓分斷功能：節(jié)能器在電源電壓低至132V時給出釋放信號,使交流接觸器斷開。 (3)設(shè)計了欠壓報警功能：節(jié)能器的電源電壓低至185V時,給出報警信號。 (4)設(shè)計了過壓報警功能：節(jié)能器的電源電壓高于242V時,給出報警信號,該功能在現(xiàn)有版本測試中未實現(xiàn),在新版中已經(jīng)重新設(shè)計。 (5)設(shè)計了過溫報警功能。芯片檢測到周圍溫度高于125℃時,節(jié)能器報警；當溫度降低且低于85℃,報警解除(此溫度報警范圍為2014年4月新版(流片中)的數(shù)據(jù),而文中第五章測試數(shù)據(jù)為2013年11月流片的現(xiàn)有版本數(shù)據(jù),文中其它與溫度報警相關(guān)的內(nèi)容均已采用新版流片的數(shù)據(jù)) (6)采用CSMC0.5um數(shù)�；旌螩MOS工藝實現(xiàn)了交流接觸器的節(jié)能芯片ZDLX-1H。測試結(jié)果表明,以該芯片為核心的節(jié)能器配合交流接觸器工作,節(jié)電率可達90%以上。芯片靜態(tài)工作電流300uA左右,功耗僅為1.5mW。符合低功耗設(shè)計指標,并且通過了國家標準GB8871—2001中的EMC項目測試。
[Abstract]:Ac contactors as a large-scale use of low-voltage electrical appliances in industry and agriculture, its use in the country hundreds of millions, the total amount of electricity consumption is huge. Therefore, in order to alleviate the energy shortage and construct the energy-saving society, it is of great significance to design an AC contactor energy-saving chip with independent intellectual property rights. According to the working principle of AC contactor "strong electric absorption, weak electric absorption", a kind of AC contactor energy saving chip ZDLX-1H (Zhejiang University Green Core No. 1) is designed in this paper. The energy-saving device based on this chip is used in conjunction with the AC contactor model CJ20-100A (220V), which enables the AC contactor to operate in a DC mode with very small conduction angle. It can not only save electric energy, but also significantly reduce noise and temperature rise. The economizer is small in volume, easy to install, and can be easily modified to traditional AC contactors. In addition, the chip ZDLX-1H also designed the functions of over-voltage alarm, under-voltage alarm and temperature alarm, which improved the safety and reliability of the economizer. The main work and innovations are as follows: (1) the intelligent PWM (PWM) mode economizer is designed. When the AC contactor enters the energy-saving state, the output pulse width of the chip can be automatically adjusted according to the external voltage. When the voltage of the external circuit is too high or too low, the output pulse width (on angle) of the economizer decreases or increases accordingly, so as to ensure that the current passing through the economizer is within a suitable range and keep the energy saving rate stable. (2) the low-voltage break-off function is designed: when the power supply voltage is as low as 132 V, the energy-saving device gives the release signal and causes the AC contact device to break off. (3) the undervoltage alarm function is designed: when the power supply voltage of the economizer is as low as 185 V, the alarm signal is given. (4) the alarm function of over-voltage is designed: when the power supply voltage of the economizer is higher than 242V, the alarm signal is given, which has not been realized in the test of the current version, and has been redesigned in the new version. (5) the function of overheating alarm is designed. When the temperature of the chip is higher than 125 鈩，

本文編號：2433058