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SHZ-E恒轉速源

發布日期：2025-01-05
訪問次數：1280
地址：上海寶山

SHZ-E恒轉速源（以下简称SHZ－E）是根据JJG622－97《绝缘电阻表检定规程》和JJG366－2004《接地电阻仪检定规程》的技术要求而设计生产的产品，系我厂原有SHZ-D型恒转速源的改进型，显示方式更直观，静音效果更突出，重量更轻，*各种正轴和偏轴型手摇式兆欧表和接地电阻表的检定需求

訂購留言

SHZ-E恒轉速源（以下簡稱SHZ－E）是根據JJG622－97《絕緣電阻表檢定規程》和JJG366－2004《接地電阻儀檢定規程》的技術要求而設計生産的産品，系我廠原有SHZ-D型恒轉速源的改進型，顯示方式更直觀，靜音效果更突出，重量更輕，*各種正軸和偏軸型手搖式兆歐表和接地電阻表的檢定需求。本儀器綜合多種恒轉速源之特點，結合用戶意見，采用步進電機驅動，啓
動轉速爲120轉和150轉兩檔,設計大轉速250轉/分，可通過轉速控制開關任意設定，且轉速不隨負載變化而波動。輕觸開關和同軸平衡裝置，使控制系統與工作連成一體，操作簡便，性能可靠。
2 主要技术指标
SHZ-E恒轉速源
转速范围： 100 ～ 250转／分

定速点： 120转／分，150转／分

精度： ±1转

使用电压： 220V±22V ，50Hz±5 Hz

功耗： 100W

外型尺寸（mm）： 385 ×305 ×95

重量： 10kg

3 工作原理单片机和晶振来产生与电机转速相匹配的PWM信号，启动键和调速键合成多功能键，共同完成启动转速和步进调速功能。由单片机产生的PWM信号经驱动电路放大后，直接推动步进电机，由步进电机来驱动电机。步进电机的转速只由PWM的频率来决定，而与供电电压无关，因此，它的转速不会随负载的变化而改变。
4.2檢查儀器外觀完好，各旋鈕運動平滑。
4.3儀器安裝在水平台面上，電源開關置于關的狀態下，連接好電源線。

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The captain gave the order to cast off the lines. Hardly had the echo of his words ceased before the lines had fallen. Then he rang the signal to the engineer, and the great screw began to revolve beneath the stern of[Pg 49] the ship. Promptly at the advertised time the huge craft was under way. The crowd on the dock cheered as she moved slowly on, and they cheered again as she gathered speed and ploughed the water into a track of foam. The cheers grew fainter and fainter; faces and forms were no longer to be distinguished; the waving of hats and kerchiefs ceased; the long dock became a speck of black against the hilly shore, and the great city faded from sight. "But there is danger that you will get tired if we keep on much longer about the sights of Canton, and particularly the shopping part of it. Besides, we want to go out and see what there is in Hong-kong, and perhaps we may run across something new in the Chinese part of the city that we shall want to buy. A good many people say that you can buy Canton goods just as cheaply in Hong-kong as in the city they come from. That may be so; but then it is more satisfactory to get them there and have the pleasure of buying them on the spot. "Let's go back," whispered Lilian, and they turned and retraced their steps. The sight of the lovers sealed their lips. Doctor Allingham struggled for a few moments with a strange sense of bigness wanting to escape. Almost it was a physical sensation; as though the nervous energy in his brain had begun to flow independently of the controls that usually guided it through the channels graven by knowledge and experience. It was Lilian who spoke next, and there was a note of pain in her voice. The steam-engine is the most important, and in England and America best known among motive agents. The importance of steam contrasted with other sources of motive-power is due not so much to a diminished cost of power obtained in this way, but for the reason that the amount of power produced can be determined at will, and in most cases without reference to local conditions; the machinery can with fuel and water be transported from place to place, as in the case of locomotives which not only supply power for their own transit, but move besides vast loads of merchandise, or travel. The first principle to be pointed out in regard to belts, to distinguish them from shafts as a means of transmitting power, is that power is communicated by means of tensile instead of torsional strain, the power during transmission being represented in the difference of tension between the driving and the slack side of belts. In the case of shafts, their length, or the distance to which they may be extended in transmitting power, is limited by torsional resistance; and as belts are not liable to this condition, we may conclude that unless there are other difficulties to be contended with, belts are more suitable than shafts for transmitting power throughout long distances. Belts suffer resistance from the air and from friction in the bearings of supporting pulleys, which are necessary in long horizontal belts; with these exceptions they are capable of moving at a very high rate of speed, and transmitting power without appreciable loss. “Mr. Whiteside—and Jeff?” repeated Larry. Infantry." Now you've torn it. Sometimes there were crises of extraordinary violence when he was with difficulty held down in bed, and these at last wore him out. Towards dawn he fell into a troubled sleep. She opened her lips to protest, but the sound died on them, for he stooped and swept her up in his arms. She slipped her hand to his neck to steady herself, and they went forward again towards the south. Young Ralph Bardon had come into the room, and stood by the door while the last verse was being sung. He was there to give an invitation from his father, for every year the Squire provided the choristers with a mild debauch at Flightshot. Robert had been to several of these, and they glittered in his memory—the laughter and games, the merry fooling, the grand supper table gay with candles. What a joke it had been when someone had given the salt to Rosie Hubble instead of the sugar to eat with her apple pie, and when some other wag had pulled away Ern Ticehurst's chair from under him.... No one thought or spoke or wrote of anything else.[Pg 181] If at meetings Reuben tried to introduce Protection or the Franchise, he was silenced even by his own party. The Scott's Float toll-gate became as important as the Sluice or the Brede River or the Landgate Clock had been in other elections, and nothing, no matter of what national importance, could stand against it. HoME 另类淫荡p ENTER NUMBET 0010cmubhkm.com.cn
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