block diagram of solid state speed control of dc motor

... not practical for many of the smaller frame size motors used in the paper industry Tuning DC Machines for Commutation DC Motor Speed and Torque The speed of dc motors is controlled by adjusting ... main field flux (U) The dc motor speed equation is RPM $ KV (VA À IR À BD) , (U À AR) (1) where RPM, motor speed (r/min); KV , motor voltage constant—a function of the motor design; VA , voltage ... to obtain a higher output speed for the same input speed 2) The motors can be replaced with higher speed motors 3) The motors can be replaced with a low base speed motor to direct drive the machine...

Ngày tải lên: 26/11/2015, 09:40

... Đặc tính tải Thêm Radd nối tiếp cuộn dây phần ứng Example 1: Example 2: Example 3: Đặc tính động DC kích từ nối tiếp Example 4: Example 5: ...

Ngày tải lên: 17/12/2013, 14:15

... e Simulation and Speed Control of Induction Motor Drives 2012 CHAPTER ANALYSIS OF VARIOUS METHODS FOR SPEED CONTROL OF IM The various methods of speed control of 3- Induction motor are as under: ... Variation of Torque of a 3-in case of open loop PI control for constant V/f control method Figure 4.13: Variation of Rotor Speed of a 3-in case of open loop PI control for constant V/f control ... Variation of DC Bus Voltage of a 3-in case of closed loop PI control for constant V/f control method Figure 4.17: Variation of Torque of a 3-in case of closed loop PI control for constant V/f control...

Ngày tải lên: 18/12/2013, 22:06

... decomposition of TiN, as a result, it limits the growth of a-SiONWs nanowires by the mechanism Oxygen seems Fig A schematic diagram showing a growth mechanism of silica nanowires by the solid solid transformation ... formation of a titanium oxide (TiOx ) phase by removal of oxygen from the silica layer [9] The reduction of TiN seems to be a critical factor in the growth kinetics of a-SiONWs The growth of silica ... decomposition of TiN films The Ni islands act as a nucleation site for the a-SiONW growth, and expedite the reduction of TiN by supplying extra hydrogen by thermal decomposition of Fig FESEM photographs of...

Ngày tải lên: 16/03/2014, 15:04

... the time-dependence of the state of the system The mathematical solution of the equation of motion for the dynamic variables of the system will then tell us precisely the state of the system at ... chapters 2.1 State functions (Postulate 1) The first postulate states that the state of a dynamic system is completely specified by a state function Even without a clear definition of what a state function ... is one of the major triumphs of quantum mechanics The superposition of states of two or more quantum systems that leads to correlated outcomes in the measurements of these systems is often described...

Ngày tải lên: 17/03/2014, 14:41

... drive and a solid- state drive is that the solid- state drive is a lot more well solid! The lack of moving parts in the SSD is what gives it so many of its advantages, such as its speed and durability ... the advantages of a solid- state drive usually outweigh those of having another optical drive! “Blade” The “Blade” form factor basically refers to solid state drives which consist of little more ... flash-based solid- state drives were released, which work the same way that today’s solid- state drives and which don’t require a constant supply of power to hold on to their data At this point solid- state...

Ngày tải lên: 19/03/2014, 17:28

... concentration of 1% (w/v) in solid media They were dissolved to required concentrations in 15 ml of distilled water, which was used as moistening agent per g of solid substrate Effect of nitrogen ... effect of environmental parameters in SSF was studied using wheat bran, unless otherwise stated, by altering physiochemical and culture conditions Effect of different solid substrates: The effect of ... effect of different solid substrates on pectinase production was studied by using a variety of solid substrates (wheat bran, rice bran, apple pomace) The original moisture content of the apple pomace...

Ngày tải lên: 01/04/2014, 00:21

... out of the realization that, although excellent surveys and handbooks of electrochemistry and of solid state chemistry are available, there is no single source covering the field of solid state ... University of Amsterdam in 1963 on the basis of a dissertation titled: “Theoretical considerations on the kinetics of electrode reactions.” In 1964 Prof Gellings was appointed professor of Inorganic ... together with a state -of- the-art review of selected applications As is true for nearly all fields of modern science and technology, it is impossible to treat all subjects related to solid state electrochemistry...

Ngày tải lên: 16/04/2014, 11:22

Ngày tải lên: 24/04/2014, 17:13

... monodispersed Ag nanorods depends on the use of seed, pH of the medium, rate of the reduction of Ag? ions or rate of generation of Ag atoms, and concentration of CTAB [33] Ascorbic acid is preferred ... ratio of Ag2C2O4 and CTAB), formation of spherical nanoparticles (*30 nm) has been observed This is due to the poor capping ability of CTAB Formation of nanorods in the case of 1:5 ratio of Ag2C2O4 ... the texture coefficient of the facet (hkl), I(hkl) is the intensity of the (hkl) reflection of the sample under analysis, Io(hkl) is the intensity of the (hkl) reflection of a polycrystalline bulk...

Ngày tải lên: 22/06/2014, 01:20

... ic PMSM sin /cos of Flux angle Speed estimator IGBT-based Inverter ia ib Clark ˆ  PWM1 PWM2 PWM3 PWM4 PWM5 PWM6 External load i i Fig.1 The block diagram of adaptive speed control for sensorless ... 1 (34) (35) III SIMULINK/MODELSIM CO-SIMULATION OF SENSORLESS SPEED CONTROL FOR PMSM DRIVE In Fig.1, it shows the sensorless speed control block diagram for PMSM drive and its Simulink/ModelSim ... performs the function of speed estimation and speed loop adaptive PI controller, the function of current controller and coordinate transformation (CCCT) and SVPWM, and the function of SMO-based rotor...

Ngày tải lên: 02/08/2015, 13:21

... OF ALL -SOLID- STATE THIN FILM LITHIUM ION MICROBATTERIES ZHU JING (B Eng., Sichuan University M Eng., Sichuan University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ... Fig 3.2 Schematic of delamination Fig 3.3 The schematic diagram of (a) dc- writing operation in biased-AFM and (b) KPFM measurements Fig 3.4 Schematic of operation principle of ESM method on a ... and development of all -solid- state thin film lithium ion microbatteries [7, 52, 74, 107, 108] Research on non-rechargeable solid- state lithium ion batteries with lithium iodide solid electrolyte,...

Ngày tải lên: 09/09/2015, 10:14

... dewetting process of metal thin film, both liquid -state dewetting and solid- state dewetting However, most of the studies are on dewetting of elemental materials In particular, for solidstate dewetting, ... non-wetting Figure 1.1: Sketch of a liquid drop at solid substrate There are generally two types of dewetting process of thin film, liquidstate and solid- state In liquid -state dewetting, agglomeration ... the solid state at temperature below the melting point of the metal thin film.34 This chapter will discuss the theory behind solid- state dewetting of metal thin film Two different types of solid- state...

Ngày tải lên: 09/09/2015, 11:26

... Molding (µPIM) .6 1.3 Solid- State Sintering II Grain Coalescence and Modeling of Nanosized Zirconia in Solid- State Sintering 1.3.1 Understanding in Solid- State Sintering 1.3.2 ... Dominated Solid- State Sintering Model for Nanosized Powder 87 6.1 Background of Grain Coalescence .87 V Grain Coalescence and Modeling of Nanosized Zirconia in Solid- State Sintering ... Modeling of Nanosized Zirconia in Solid- State Sintering LIST OF FIGURES Figure 1-1 Inter and intra-agglomerates pore (a) before and (b) after sintering Figure 1-2 Schematic diagram of powder...

Ngày tải lên: 14/09/2015, 08:24

... information on the size of the delay is often available in many processes Hence, by using this information and employing a feedback of the past control history as well as the current state, we may expect ... memory controller design for the exponential stabilization of linear singular time delay systems with control delay To the best of our knowledge, finite-time stabilization problem for linear control ... stabilization of the control time-delay systems The conditions are obtained in terms of LMIs, which can be determined by utilizing MATLABs LMI Control Toolbox [17] The structure of the paper is...

Ngày tải lên: 12/10/2015, 10:29

... winding of a separately excited DC motor are supplied from two independent DC power sources A separately excited DC motor is described in steady -state operation with the following set of equations, ... of the series DC motor, derive its torque -speed characteristic and show graphically toque -speed curve b) Calculate rated power of the motor and its efficiency in rated operation c) Find the speed ... assume that a DC motor drives a constant speed independent load torque Depending on how excitation winding and armature winding are supplied from DC voltage sources, various types of DC motors may...

Ngày tải lên: 17/12/2013, 14:15

... used Operation of the DTC of a BLDC motor above the base speed is not in the scope of this paper Conventional two-phase conduction quasi-square wave current control causes the locus of the stator ... the difficulty of the flux control if it is used in the control scheme The steady -state speed is 30 mechanical rad/s and the dc- link voltage Vd, equals 33.94 V Since the speed is controlled a better ... corresponding three-phase voltage vectors which are used in DTC of a PMSM drive The overall block diagram of the closed-loop DTC scheme of a BLDC motor drive in the constant torque region is represented...

Ngày tải lên: 03/01/2014, 19:44

... amount of computations will be reduced by the use of look-up tables The aim of this study was to reach an efficient control of the instantaneous torque of a non-sinusoidal brushless DC motor The ... : Characterization ofthe studied motor IV CONTROL SCHEME FOR BDCM In this paper, two different control schemes are studied They are simulated using data corresponding to a motor with a very simple ... IMPLEMENTATION OF THE NONLMAR FEEDBACK CONTROL SCHEME The implementation of the nonlinear feedback control scheme in "pseudo-dq" frame described above requires numerous control and computation tasks The control...

Ngày tải lên: 03/01/2014, 19:44

... validity and effectiveness of the sensorless three-phase conduction DTC of a BLDC motor drive with six-switch inverter The Proposed Sensorless DTC of Four-Switch BLDC Motor Drive Using Three-Phase ... Conduction 2.1 Principles of the Proposed Method Title Block Indirect torque control method of BLDC motor explained in [9] was extended to a direct torque and indirect flux control technique for ... Observer Te = αβ / dq 3P r r (ϕ d iqs − ϕ q ids ) Fig 2: Block diagram of the direct torque and indirect flux control of four-switch BLDC motor drive using three-phase conduction mode without position...

Ngày tải lên: 03/01/2014, 19:45

... III PROPOSED SENSORLESS DTC OF BLDC MOTOR DRIVE USING THREE-PHASE CONDUCTION A Principles of the Proposed Method In this study, indirect torque control method of BLDC motor explained in [29] is ... results of the 356 Fig mode IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL 16, NO 2, APRIL 2011 Overall block diagram of the position-sensorless direct torque and indirect flux control (DTIFC) of BLDC motor ... programming-based control of brushless motors,” IEEE Trans Control Syst Technol., vol 11, no 1, pp 139–146, Jan 2003 [19] S J Kang and S K Sul, “Direct torque control of brushless dc motor with nonideal...

Ngày tải lên: 03/01/2014, 19:46