查询词典 direct current

A new brushless DC motor DTC scheme was studied to solve those problems associated with direct torque controlof brushless DC motor,such as difficulty to control flux and complexity to estimate torque.The flux hysteresis controller was ignored in the constant torque region and an improved method was proposed to make the estimation of torque easier.The proper stator voltage space vector was selected based on the output of the torque hysteresis controller and the sector which the current rotor flux locates in.

摘 要：针对无刷直流电机直接转矩控制中磁链观测困难、控制复杂等问题，提出了一种应用于无刷直流电机二二导通方式下的新型直接转矩控制方法：在电机基频以下调速时，略去了常规的磁链观测控制环节，改进了转矩计算方法，通过转矩滞环控制选择所施加的空间电压矢量。

Is straightforward with clear current seeable pay out and payback, forming a direct motivation system. The movie is a comparably long-term investment."Making Movies in the Way of Making Advertisements."

广告求实，有付出就有回报，看似复杂的竞争机制，却可以在简单中找到动力；电影求虚，未来抑或理想，都是长线投资的眼光。

It is suitable for the exchange of 50 or 60Hz, rated voltage to 660V and below, rated operating current to 95A and below the circuit for long-distance direct control of three-phase squirrel cage motor start, stop and reversible operation.

它适用于交流50或 60Hz，额定工作电压至660V及以下、额定工作电流至95A及以下的电路中，供远距离直接控制三相鼠笼型电动机之起动、停止及可逆运转。

Pointed out that from the financial point of view, countries in the current macroeconomic policy, the bank's second-hand housing loan requirements of the subject matter of strict than before, and the proportion of loans and repayment period is more stringent; in the process of a direct impact on second-hand housing transactions to the mortgage, that is, there are all kinds of unreasonable, then there are now many banks have stopped the process to switch mortgage business, real estate transactions on the secondary impact is relatively large.

胡景辉指出，从金融角度来看，国家在目前的宏观经济政策，银行的二手房贷款需求的主题事项严格比以前的比例贷款和还款期是更严格；的过程中，直接影响了二手房交易抵押贷款，也就是说，有各种各样的不合理的，那么现在有许多银行已停止的进程切换抵押贷款业务，房地产交易的次要影响比较大的。

As a direct consequence of the plant closure and due to the current downturn in BASF's key markets in Spain, the company will also adjust the structure of production services in Tarragona.

作为工厂的关闭，并由于在西班牙巴斯夫的主要市场目前低迷的直接后果，该公司还将调整生产结构服务的塔拉戈纳。

The HWC is not a direct branch of the Tsushima Warm Current.

3黄海暖流并非对马暖流的直接分支。

Controller appliance has air conditioners, refrigerators, water heaters, ice machines, drinking fountains and many other micro-computer controller; Li-ion battery miner's lamp controller has large batteries, LED lights constant current discharge protection, LED lights have the main, two-way switch function deputy brightness high, condenser, and product technology in the leading domestic level; industrial control equipment have for wave soldering, reflow, such as electronic sensing equipment such as thermometer, high-precision and stable performance for your products and equipment escort; direct digital controller to follow the LonTalk protocol LonWorks node.

家电控制器有空调，冰箱，热水器，制冰机，饮水机等多种微电脑控制器；矿灯控制器具有锂电池大电池充电，LED灯恒流放电保护， LED灯有主，副两路切换功能，亮度高，聚光好，产品技术处于国内领先水平；工控配套设备有用于波峰焊、回流焊等设备的电子传感测温仪器等，高精度及稳定的性能将为您的产品和设备保驾护航；直接数字控制器为遵循LonTalk协议的LonWorks节点。

A two component vector potential in direct BEM is decuced in this thesis, which is the first successful one of indirect BEM for 3D eddy current problems.

用间接边界元法计算三维涡流场在国内、外都还未见成功的先例。

The wattmeter connects with measured circuit direct when the power is low,then connects with measured circuit though mutual inductor when the rating of wattmeter of the voltage or current is overrun.

当被测电路的功率比较小时，采用直接和功率表相接方法；当被测电路的电压和电流超过仪表电压和电流的最大额定值时，就要用互感器和仪表相接。

Given the current complexity of industrial recovery of 3'-methyl-2'-butenyl 3, 3-dimethyl-pentenoate and the decomposition problems with 2-methyl-1-butene, research was conducted on a process for direct recycling of MBDP involving an ester exchange reaction of MBDP with either methanol, trimethyl orthoacetate, or solutions of methanol and trimethyl orthoacetate.

针对目前工业上回收3，3-二甲基－4-戊烯酸－3'-甲基－2'-丁烯酯工艺复杂、异戊烯大量分解问题，研究了MBDP直接返回循环使用工艺，MBDP与甲醇、原乙酸三甲酯或与甲醇原乙酸三甲酯混合溶液进行酯交换反应的回收新工艺，比较了四异丙基钛酸酯、甲醇钠、氢氧化钾用作酯交换催化剂的效果，筛选出回收MBDP&一锅煮&最佳工艺：按照n：n：n：n＝1.0：9.8：9.2：0.05物质的量比投料，74℃~78℃反应21h，MBDP转化为贲亭酸甲酯和异戊烯醇，单程转化率87.7%，用85%的磷酸中和甲醇钠，蒸出甲醇，直接用于合成贲亭酸甲酯。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。