pumps fans and variable speed drives

... motors up to 500V used with a variable speed drive B – motors up to 600V used with a variable speed drive C – motors not specified for use with variable speed drives (IEC60034-17) C Overvoltage ... commands. parameter Trang 57ATV71Motor control menuEncoders Trang 58Encoder Configuration (necessary to turn the motor). overspeed and sway, catch on the fly (all control laws) display of speed and ... Trang 62PI speed feedback loop  Settings « PI structure » SFC = 1 Speed Ramp Speed Reference Speed feedback + - Regulator Torque current reference Limitation SPG SIT =1/gI Trang 63Speed feedback...

Ngày tải lên: 28/12/2015, 17:07

... voltagecontroller Variable speed drives ensure gradualacceleration and deceleration and enable speed to be matched precisely to operating conditions Controlled rectifier type variable speed drives areused ... aresignificantly expanding the drives on offer andtheir options 1.2 Reminders: The main functions of electronic starters and variable speed drives Controlled acceleration Motor speed rise is controlled ... motor starter and form of power supply current M 3 ϕ ααI Trang 123 Structure and components of electronic starters and drives3.1 Structure Electronic starters and variable speed drivescomprise...

Ngày tải lên: 28/12/2015, 17:07

... across terminals PA and PB or across the DC bus capacitors • Install and close all the covers before applying power or starting and stopping the drive • Before servicing the variable speed drive: - ... Connect the speed reference PROGRAMMING Programming Manual INSTALLATION Trang 7Preliminary recommendationsHandling and storage To protect the drive prior to installation, handle and store the ... Trang 1Altivar 71Variable speed drives for synchronous motors and asynchronous motors Installation Manual 03/2011 0.37 (0.5 HP) 45 kW...

Ngày tải lên: 28/06/2014, 16:20

... Inside" card Please consult the “Soft starters and variable speed drives” catalogue 18 and 19 Trang 6Altivar 71 The Altivar 71 range of variable speed drives is able to respond to the most exacting ... If > 7.7 V and < 13 V If > 7.7 V and < 16 V If > 11.5 V and < 25 V The maximum high-speed frequency should not exceed 300 kHz Trang 32Presentation, Variable speed drives Two models ... obtain remarkable speed accuracy and maximum torque even at zero speed The design and construction of synchronous motors is such that they offer enhanced power density and speed dynamics in a...

Ngày tải lên: 28/06/2014, 16:20

... University of Technology Faculty of Mechanical Engineering Đề cương môn học Bơm, quạt, máy nén ( Pumps, Fans and Compressors ) Số tín chỉ 3 ETCS 2 Mã số môn học ME2121 Học kỳ áp dụng 20201 Số tiết / ... thuyết và thực hành Bơm – Quạt – Máy nén, Nhà xuất bản Đà Nẵng, 2005 [4] J B Rishel, HVAC pump handbook, McGraw-Hill, 2nd ed, 2006 Hiểu biết, kỹ năng, thái độ cần đạt được sau khi học môn học...

Ngày tải lên: 10/03/2024, 23:32

... ATV71H ppp M3X and ATV71H ppp N4 drives ATV71H D55M3XD to D75M3XD and ATV71H D90N4D to C50N4D drives are not supplied with a DC choke ATV71H D55M3X to D75M3X and ATV71H D90N4 to C50N4 drives are ... across terminals PA and PB or across the DC bus capacitors • Install and close all covers before applying power or starting and stopping the drive • Before servicing the variable speed drive - Disconnect ... category 3 of standard EN 954-1, ISO 13849-1 and safetyintegrity level 2 according to IEC/EN 61508 The Power Removal function takes priority over any run command Read and understand the instructions...

Ngày tải lên: 28/06/2014, 16:20

... factors and parameters (economics, social and institutional) that affect consumer behavior in relation to end use energy demand and consumption, the economic rationality in energy use and the ... and 205 m2) and large size (more than 205 m2) As shown in Figure 2, the percentages of the house sizes in the test group are 54%, 40%, and 6 % for large, medium and small homes respectively and ... with heat pumps The energy consumptions for homes with gas and homes with a combination method of heating are 1.9 and 1.6 times the consumption of house with heat pumps To further understand the...

Ngày tải lên: 05/09/2013, 16:10

... New Rules of Marketing & PR and the new hit books Marketing Lessons from the Grateful Dead and Real-Time Marketing & PR How Marketing & PR at Speed Drives Measurable Success Real-Time: ... & PR at Speed Drives Measurable Success D A V I D M E E R M A N S C O T T 3 Gone are the days when you could plan out your marketing and public relations programs well in advance and release ... the real-time era. Scale and media buying power are no longer a decisive advantage. What counts today is speed and agility. “With his acute ear for the cash register and his journalist’s sense...

Ngày tải lên: 29/03/2014, 20:20

... signal CBR and VBR stand for constant bit rate and variable bit rate, respectively SIF stands for source input format HalfD1 stands for video size of 352×480 pixels for one frame FullD1 stands for ... received video image and sound packets are forwarded to the NPGITC At NPGITC, these image and sound packets are decoded to video and sound signals and these signals are encoded and resent to the ... high-speed (broadband) networks; (3) smooth and efficient connectivity with TCP/IP net-works; (4) available use of all software (video-conferencing soft-ware, etc.) and equipment (video cameras and...

Ngày tải lên: 22/06/2014, 06:20

... y2} and x0+ y0 = x1+ y1, x1· y1 = x2+ y2 and x0· y0 = x2· y2 To see this, fix some positive integer m and let a ∈ N be such that a > m Let h be any positive integer and define x0, x1, x2, and ... (a j − 2) − 1 and m j = (a j − 3)(a j − 2)a j (a j + 1) a On 3-fans In order to find 3-fans, we have to find positive integers a and b with b ≤ a such that p (a + b + 2)2+ 4ab and p (a + b + ... the colours y and z Thus, Trang 10without loss of generality, let us colour 23 with z and 120 with y Finally, because of the edges (24, 23) and (14, 24), and since 23 has colour z and 14 has colour...

Ngày tải lên: 07/08/2014, 08:20

... with k vertices and by Kn,m a complete bipartite graph with parts of size n and m The notion of clique-width of a graph was introduced by Courcelle, Engelfriet and Rozenberg in [8] and is defined ... graph H on the same vertex set by connecting two vertices u ∈ Vi and v ∈ Vj if and only if uv ∈ E(H′) and ij 6∈ E(K) or uv /∈ E(H′) and ij ∈ E(K) The intent is that H contains infinitely many copies ... range Xn≥ n(1+o(1))n the minimal speed coincides with the Bell number Bn and there are exactly two minimal properties of this speed, namely, disjoint union of cliques and their complements We now...

Ngày tải lên: 07/08/2014, 21:21

... level, and the speed of adjustment David Begg, Stanley Fischer and Rudiger Dornbusch, Economics, 6th Edition, McGraw-Hill, 2000 Power Point presentation by Peter Smith Trang 2Introducing prices and ... 3The price level and aggregate demand The CLASSICAL model of macroeconomics analyses the economy when wages and prices are fully flexible.  The real money supply is the key variable linking ... linking the aggregate demand for goods and the price level.  The price level is the average price of all the goods produced in the economy. Trang 4The macroeconomic demand schedule (MDS) connects...

Ngày tải lên: 03/02/2015, 15:21

... VIBRATION REDUCTION AND VARIABLE END-STIFFNESS JOINT DESIGN LI RENJUN NATIONAL UNIVERSITY OF SINGAPORE 2014 Trang 2IMPROVING FORCE CONTROL THROUGH EFFECTOR VIBRATION REDUCTION AND VARIABLE END-STIFFNESS ... of conventional position control and force control The workspace is defined as two orthogonal workspaces for displacement and force separately [28, 29] Anderson and Spong [30] later proposed hybrid ... friction and non-linearity into the system, which degrades the system bandwidth and stability significantly [38] Furthermore, many of the above force control methods need to use filter to handle...

Ngày tải lên: 09/09/2015, 11:13

... injection pump and Trang 943.5 Fuel injection pump and Trang 953.5 Fuel injection pump and A Fuel oil pump cao tiếp tục đi lên cho đến khi van Trang 963.5 Fuel injection pump and Trang 973.5 ... pump and ở hành trinh đi lên của plunger, nhiên liệu sẽ đ ợc cấp đến vòi phun Trang 1073.5 Fuel injection pump and Trang 1083.5 Fuel injection pump and Trang 1093.5 Fuel injection pump and ... 1003.5 Fuel injection pump and • Plunger của bơm trong quá trinh chuyển động sẽ đóng mở hai lỗ này. Trang 1013.5 Fuel injection pump and Trang 1023.5 Fuel injection pump and khiển sẽ cấp vào,...

Ngày tải lên: 14/05/2016, 20:49

... Trang 1MEM18007B Maintain and repair mechanical drives and mechanical transmission assemblies Reference Book Trang 2UNIT: 18007B – Maintain and repair mechanical drives and mechanical transmission ... Section 3 – Chain drives 69 Introduction 70 Precision roller chain 71 Types of chain 71 Joints and spare parts 73 Chain pinions and chain wheels 77 Installation and maintenance of chain drives 78 Methods ... 18007B – Maintain and repair mechanical drives and transmission assemblies Welcome to Unit 18007B, which is a stream unit of the National Metal and Engineering Industry Competency Standards This...

Ngày tải lên: 16/02/2017, 13:50

... engine speed and BMEP has been successfully demonstrated by [5] and [11] Referring to Figure 18, BSFC improvements in the 15-20% band (actual highest at 18.1%) can be seen at engine speeds between ... integrating cylinder deactivation and variable valve actuation on gasoline engines Introduction Despite the growing popularity and interest in Electric, Hybrid and other forms of alternative powertrains, ... on both the base engine model and the CDA+VVA model with smaller throttle angle increments for the engine speed range between 1000rpm and 4000rpm Similar engine speed ranges for CDA applications...

Ngày tải lên: 23/05/2017, 22:13

... access to all regulations/course handouts, and awareness of Operational Environment (OE)/Contemporary Operational Environment (COE) variables and actors • Standard: with at least 80% accuracy ... Fixed and variable components of cost are not always identifiable • This is especially true in service activities • Sometimes costs aren’t strictly fixed and variable but mixed or semi-variable ... Trang 2How can we determine which costs are fixed and which are variable? Trang 3Terminal Learning Objective• Task: Determine the fixed and variable components of a mixed cost using the High-Low...

Ngày tải lên: 09/01/2018, 12:24

... Absorption and Variable Costing (15 minutes)1 Standard cost of sales, 18,000 x $30 540,000 Standard gross margin 360,000 Selling and administrative expenses 300,000 2 Standard variable cost ... Absorption and Variable Costing (15 minutes) 1 Standard cost of sales, 22,000 x $30 660,000 Standard gross margin 440,000 Selling and administrative expenses 300,000 2 Standard variable cost ... level used to set the standard, there is no volume variance 13-8 Basic Standard Costing Absorption and Variable (25 minutes) Income Statements Variable Costing Selling and administrative 60,000...

Ngày tải lên: 28/02/2018, 14:21

... intelligence system has been felt and raised from time to time by many scientists (Kalloo and Pandey, 2002; Rai and Pandey, 2004; Singh et al., 2004) Murthi and Shikamany (2007) have observed ... 2017 and 2018 Analytical framework The variables are said to be integrated if there exists a stationary linear combination of non-stationary random variables In a model which includes two such variables ... potential markets and the pattern of market arrivals and prices in important regional and national markets further add to the woes of the growers Therefore, the requirement of proper and adequate...

Ngày tải lên: 28/09/2020, 17:31

... for MIRU loci 4 and 27 and Allix et al (2006) reported high allelic diversity for MIRU loci 24 and 27. In our study, MIRU loci 2, 27 and 31 were involved in a single (MIRU loci 2 and 27) or two-loci ... spoligotyping and MIRU-VNTR typ-ing in our country We aimed to use spoligotyptyp-ing and MIRU-VNTR typing to assess the genetic diversity of Brazilian M bovis isolates. MATERIALS AND METHODS Sampling and ... II included the MIRU types V5 and V11 and the spoligotypes SB0881 (n = 4), SB1145 (n = 2) and SB1806 (n = 1) Cluster III was composed of three MIRU types (V2, V4 and V8), with V4 containing 14...

Ngày tải lên: 09/02/2022, 15:22