freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

外文翻譯---一個(gè)逆變器在電梯門中控制兩個(gè)永磁直線電動(dòng)機(jī)-其他專業(yè)-在線瀏覽

2025-03-24 09:17本頁面
  

【正文】 ue references for the two motors respectively, the following two equations 1111 )c o s ()s i n ( qeqpsbeqpsaeq iKnuKnuK ???? ??? 2222 )c o s ()s i n( qeqpsbeqpsaeq iKnuKnuK ???? ??? As in the parallel connection case, this has a singularity when (np(? 2? 1 ))mod? =0. As in the case of the parallel connection, the reference trajectories for the two linear motors are designed to maintain an angular separation of the two motors. A control scheme for the two motors is then 外文翻譯( 原 文) 13 )()( 111111 ?????? ?? ????? r e fr e fr e f KKJ )()( 222222 ?????? ?? ????? r e fr e fr e f KKJ The direct currents are determined by the quadrature currents, specifically, substitute (13) into ??????????????????? bapp ppdd iinn nnii )s i n()c os ( )s i n()c os ( 22 1121 ?? ?? When? 2 ——? 1 ? 0177。外文翻譯( 原 文) 1 Control of two PM linear motors with asingle inverter: application to elevator doors Abstract This work considers the control of two PM synchronous motors using a single inverter. The standard approach to the control of a PM synchronous motor is to use a single inverter which provides independent control of the direct and quadrature voltages (and therefore of the direct and quadrature currents) of the motor. Here, an approach is presented that provides independent torque control of two PM synchronous motors using a single inverter. In this approach, the quadrature current of each motor is controlled while it is shown that the direct current is uncontrollable. Both parallel and series connections of the two motors to the single inverter are considered and it is shown how the singularity of the controller can be avoided in each case. The methodology is applied to the control of elevator doors. 1. Introduction Composed by the order of relay control system is a realization of the first elevator control method. However, to enter the niies, with the development of science and technology and the widespread application of puter technology, the safety of elevators, reliability of the increasingly high demand on the relay control weaknesses are being evident. Elevator control system relays the failure rate high, greatly reduces the reliability and safety of elevators, and escalators stopped often to take with the staff about the inconvenience and fear. And the event rather than taking the lift or squat at the end of the lift will not only cause damage to mechanical ponents, but also personal accident may occur. Programmable Logic Controller (PLC) is the first order logic control in accordance with the needs of developed specifically for industrial environment applications to operate the electronic digital puting device. Given its advantages, 外文翻譯( 原 文) 2 at present, the relay control the lift has been gradually replaced by PLC control. At the same time, AC variable frequency motor speed control technology, the way the lift drag speed has been a gradual transition from DC to AC frequency converter. Thus, PLC control technology increases VVVF Elevator modern technology has bee a hot industry. With the continuous development of urban construction, the increasing highrise buildings, elevators and life in the national economy has a broad application. Elevator highrise buildings as a means of transport in the vertical run of daily life has been inextricably linked with people. In fact the lift is based on external call control signals, as well as the laws of their own, such as running, and the call is random, the lift is actually a manmachine interactive control system, simple to use control or logic control order can not meet the control requirements, and therefore , elevator control system uses a random control logic. Elevator control is currently generally used in two ways, first, the use of puter as a signal control unit, the pletion of the lift signal acquisition, operation and function of the set, to achieve the lift and set the automatic scheduling function to run the election, drag the control from inverter to plete。 the second control mode with programmable logic controller (PLC) to replace the puter control signal sets the election. From the control and performance, these two types of methods and there is no significant difference. Most of the domestic manufacturers to choose the second approach, because the smaller scale of production, their design and manufacture of high cost of puter control devices。2kπ, id1, id2 ? ? and consequently, the currents id1, id2 can be large near the singularity. Again, the control scheme is to offset the angular position of the two motors by (1/2) π/np. As before, both motors nominally track the same trajectory so that the controller would nominally keep np(? 2 ——? 1) = π/2 and therefore keep the system away from the singularity. . Simulations To simulate the series connected system, the first and second equation of (10) are added to the first and second equation of (11), respectively so that with vsa = vsa2 + vsa1, vsb = vsb2 + vsb1, along with the two speed and two position equations, the overall dynamic model for simulation is sapeqpeqsaSsa vnKnKiRdtdiL ????? )s i n()s i n(22 2211 ???? sbpeqpeqsbSsb vnKnKiRdtdiL ????? )s i n()c os (22 2211 ???? 1111 )c os ()s i n( Lpsbeqpsaeq niKniKdtdJ ???? ???? 11 ?? ?dtd 外文翻譯( 原 文) 14 222 )c os ()s i n(2 Lpsbeqpsaeq niKniKdtdJ ???? ???? 22 ?? ?dtd Here dtdrrxxeqeq11111???? dtdrrxxeqeq22221???? The speed profile was the same as the parallel connected case. The position profile are also similar to the parallel connected case. The speed tracking error is less than 5+104m/s and therefore is not shown. The quadrature currents shown below are identical to the parallel case as it must since the torque required for either case is the same. The uncontr
點(diǎn)擊復(fù)制文檔內(nèi)容
環(huán)評(píng)公示相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1