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A dc to ac conversion avoids costly plant overhaul

机译：直流到交流转换避免了昂贵的设备检修

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All of the spinning frames were dc controlled, and as the existing dc motors were obsolete, spares were not readily available. The 75kW motors also needed regular maintenance, with each one requiring the replacement of twelve carbon brushes every year, as Dave Evans, the electrical coordinator at Brintons Carpets explains. "This totalled about £5,000 just on replacement carbon brushes across all the dc motors and excluding the manpower needed to carry out the maintenance work. The ac induction motors, however, can be repaired or rewound easily, thereby removing maintenance and spares issues we faced with the dc system." Brintons' worked with Sentridge Control, with whom they have had a long term relationship, and Sentridge area manager Phil Tomkinson was quizzed about the feasibility of the dc to ac conversion. "This is something we have done before and when Brintons suggested it as a solution to help increase capacity we immediately saw the potential," says Mr Tomkinson. "The biggest challenge was the increase in power needed by bringing in additional machines, with each motor rated at 75kW, bringing the demand close to 1MW."
机译：所有的纺纱机都是直流控制的，并且由于现有的直流电动机已过时，因此没有备用零件。布林顿地毯公司的电气协调员戴夫·埃文斯（Dave Evans）解释说，75kW电动机还需要定期维护，每年每台电动机都需要更换十二个碳刷。 “仅更换所有直流电动机上的碳刷，总费用约为5,000英镑，这还不包括进行维护工作所需的人力。但是，交流感应电动机可以轻松地修理或回绕，从而消除了我们面临的维护和备件问题直流系统。” Brintons与Sentridge Control有着长期的合作关系，Sentridge地区经理Phil Tomkinson也被问到了DC到AC转换的可行性。汤姆金森先生说：“这是我们做过的事，当布林顿公司提出它作为帮助提高产能的解决方案时，我们立即看到了潜力。” “最大的挑战是通过增加额外的机器来增加功率，每台电动机的额定功率为75kW，使需求接近1MW。”

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    《Design products & applications》 |2015年第10期|19-19|共1页
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