dc motor speed control using pwm technique ppt

Ngày tải lên: 23/06/2014, 01:20

... pulse-width-modulated (PWM) power amplifier. Motor speed is measured using an analog tachometer. Figure 2. Physical System Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control ... schematic diagram of a DC motor is shown in Figure 6. Figure 6. Schematic Diagram of a DC Motor Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 10 ã ... root-locus domain. Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 24 Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System 1. Introduction This...

Ngày tải lên: 25/01/2014, 13:20

... B r e r v r B r I r F r B r v r e r B r I r F r Đặc tính cơ của động cơ DC kích từ nối tiếp Example 4: Example 5: Đặc tính cơ 4 phần tư...

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 18/12/2013, 22:06

Ngày tải lên: 03/01/2014, 19:44

Ngày tải lên: 03/01/2014, 19:44

... Block Indirect torque control method of BLDC motor explained in [9] was extended to a direct torque and indirect flux control technique for six-switch inverter BLDC motor in [7] which is suitable ... conduction DTC of BLDC motor drive with six-switch inverter scheme. Keywords: Brushless dc (BLDC) motor, sliding mode observer, direct torque control (DTC), stator flux control, fast torque ... reported to control of BLDC motor using six-switch three-phase inverter (SSTPI). Direct torque control (DTC) scheme was first proposed by Takahashi [1] and Depenbrock [2] for induction motor drives...

Ngày tải lên: 03/01/2014, 19:45

... maximum-efficiency control of BLDC motor, ” IEEE Trans. Ind. Electron., vol. 47, no. 1, pp. 109–114, Feb. 2000. [22] L. Hao and H. A. Toliyat, “BLDC motor full -speed operation using hybrid sliding ... INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR 355 TAB L E I S WITCHING T ABLE FOR DTC OF BLDC M OTOR U SING T HREE - PHASE C ONDUCTION indirectly kept at its optimum level, while the motor speed is less ... 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

... only the torque is controlled without speed control, the time range of control system under transient state is selected short. The motor speeds up to a very large value if the motor is run longer ... bill.alexander@idealpowerconverters.com Abstract—This paper presents a direct torque control (DTC) technique for brushless dc (BLDC) motors with non- sinusoidal back-EMF using four-switch inverter in the constant torque region. ... of a BLDC motor drive using four-switch inverter with faster torque response due to the fact that the voltage space vectors are directly controlled. Therefore, the direct torque controlled...

Ngày tải lên: 03/01/2014, 19:46

... conventional control system for BLDC motor (Fig. 2). The motor is fed by a PWM- controlled MOSFET inverter. As we can see in Figs. 2 and 3, the currents are controlled by 3 current controllers ... motor that is fed by square-wave current and it is often called Brushless DC Motor (BLDCM). The main difference between two kinds of motors from the control viewpoint resides on current control ... machine, Vector control, Pseudo-vector control, Torque ripple minimization. I. I NTRODUCTION A. Sine-wave PM Motor vs. Square-wave Motor: Vector Control vs. Phase Current Control With the...

Ngày tải lên: 03/01/2014, 19:46

...  Overview of Gas Springs 2 . 21369 . 2007 . 1 Speed Control TM ô SPC Gas Springs, cushioned 2486.12. FIBRO SPC Gas Springs Speed Control TM ô are designed to reduce or eliminate the ... caused by the increased return travel speed in high speed presses (link drive presses). SPC Gas Springs feature an integral return travel delay which reduces the speed of the gas spring to 0.4 m/s ... 2 . 21370 . 2007 . 1 3 Speed Control TM ô SPC Gas Springs, 2486.12. cushioned subject to alterations Force in daN at Piston...

Ngày tải lên: 22/01/2014, 02:20

... dating of pottery by thermoluminescence technique. In comparision with the radiocarbon technique, the preliminary results shown that the liquid scintillation technique may be applied effectively ... beta dose evaluation is, the more reliable is the technique of thermoluminecence dating [5,6]. Fig. 1. the measurement of the gamma dose rate using the radiometer CΡΠ-68-01. This paper presents ... activity using the liquid scintillation analyzer Tri-carb 2770TR/SL. 2. Experimentals, results and discussion The sample preparation procedure for measuring by liquid scintilation technique...

Ngày tải lên: 13/02/2014, 04:20

... Sixteenth Street N.W., Washington, DC 20036 Article Characterization of the Polymorphic Behavior of an Organic Compound Using a Dynamic Thermal and X-ray Powder Diffraction Technique David Albers, Michelle ... Conditions. DSC analyses were performed using a TA 2910 DSC with open aluminum pans (TA Instruments; no. 900793.901 or 990999.901). The samples were heated using a scan rate of 5 °C/min with a 30 ... program was complete, the trapped volatiles were analyzed using sub-ambient GC/MS. TGA Conditions. TGA analysis was performed on several samples using a TA 2950 TGA with a platinum pan. A nitrogen atmosphere...

Ngày tải lên: 14/02/2014, 03:20

... development process using version control. Version Control, sometimes called source code control, is the first leg of our project support tripod. We view the use of version control as mandatory ... gentle introduction to a particular version control system, CVS. Prepared exclusively for Francilene Procopio Garcia RO AD MA P 6 Using version control gave Fred and Wilma the control and the flexibility to ... your project. This volume, Pragmatic Version Control, describes how to use version control as the cornerstone of a project. A project with- out version control is like a word processor without an...

Ngày tải lên: 15/03/2014, 10:20

... precisely determined using current techniques. As a result, we were also unable to accurately determine the proximity of the V-PPase C-termini using the antibody-binding technique. We hence employed ... between C-termini of dimeric vacuolar H + -pyrophosphatase determined using atomic force microscopy and a gold nanoparticle technique Tseng-Huang Liu 1 , Shen-Hsing Hsu 1 , Yun-Tzu Huang 1 , Shih-Ming ... the mica surface. (C) Histo- gram of V-PPase height determined using the AFM image in (A). (D) Histogram of V-PPase width determined using the AFM image in (A). Adjacent C-termini of dimeric H + -pyrophosphatase...

Ngày tải lên: 16/03/2014, 02:20

... S. Lim, M. Z. MatJafri, K. Abdullah and C. J. Wong (2009). Air Pollution Determination Using Remote Sensing Technique, Advances in Geoscience and Remote Sensing, Gary Jedlovec (Ed.), ISBN: 978-953-307- 005-6, ... http://www.intechopen.com/books/advances-in-geoscience-and-remote- sensing/air-pollution-determination -using- remote-sensing -technique #FXCPEGUKP)GQUEKGPEGCPF4GOQVG5GPUKPI   D   E )LJ  D...

Ngày tải lên: 23/03/2014, 00:20

... reading ;********************************************************************** ;* ;* Main control loop ;* Loop call ReadADC ; get the speed control from the ADC incfsz ADC,w ; if ADC is 0xFF we’re at full speed - skip timer add goto PWM ; add Timer0 to ADC for PWM movf ... Setup ADC (bank1) movlw B’00001110’ ; ADC left justified, AN0 only movwf ADCON1 banksel ADCON0 ; setup ADC (bank0) movlw B’11000001’ ; ADC clock from int RC, AN0, ADC on movwf ADCON0 bsf ADCON0,GO ... identified 4 tasks of the control loop: ã Read the sensor inputs ã Commutate the motor drive connections ã Read the speed control ADC ã PWM the motor drivers using the ADC and Timer0 addition...

Ngày tải lên: 30/03/2014, 07:20

... volume control  Electric drill speed control Reasons for accurate speed control  Motor speed should be independent of load.  Differential drive platforms need to synchronize wheel speed ... a step response for our PID controller? Control systems  What is a control system?  What are some examples?  What are the types of control systems?  How are control systems represented? ... sec)  Motor speed (30 rpm)  Encoder resolution (500 counts/rev)  PWM frequency (1kHz)  Interrupt driven PID trigger  Eliminates code tuning  Maintains accurate PID timing Simple PWM circuit U1A 74HC14A 1 2 U1B 74HC14A 3 4 U1C 74HC14A 5 6 U1D 74HC14A 9 8 U1E 74HC14A 11 10 U1F 74HC14A 13 12 C1 CAP...

Ngày tải lên: 22/05/2014, 18:05

Ngày tải lên: 19/06/2014, 08:20