pulse width modulation pwm dc motor speed control switch
nghiên cứu kỹ thuật điều chế độ rộng xung PWM (Pulse Width Modulation) cho bộ nghịch lưu đa bậc ghép tầng (Cascade inverter)
Ngày tải lên: 08/07/2015, 21:27
Báo cáo hóa học: " Research Article Pulse Interval Modulation for Ultra-High Speed IR-UWB Communications Systems" pdf
Ngày tải lên: 21/06/2014, 08:20
Space vector pulse width modulation for multilevel inverters and solution to modulation dependent problems
Ngày tải lên: 14/09/2015, 08:37
Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
Ngày tải lên: 25/01/2014, 13:20
Điện tử công suât mạch MMC Control and experiment of pulse width modulated modular multilevel converters
... v∗ ju B Fig arm Fig Block diagram of dc- capacitor voltage control: (a) Averaging control, and (b) Balancing control The circulating current along the u-phase dc loop, iZu can be defined as iu iu ... Proportional gain of averaging control Integral gain of averaging control Proportional gain of current control Integral gain of current control Proportional gain of balancing control [A] 40 0.5 A/V 150 ... Proportional gain of averaging control Integral gain of averaging control Proportional gain of current control Integral gain of current control Proportional gain of balancing control K1 K2 K3 K4 K5 0.5...
Ngày tải lên: 15/10/2013, 16:24
Tài liệu Speed Control of DC Manchines pptx
... 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
SIMULATION AND SPEED CONTROL OF INDUCTION MOTOR DRIVES
... speed control method 38 4.3.2 Open Loop V/f speed control method using PI controller 42 4.3.3 Closed Loop V/f speed control method using PI controller 44 4.4 Vector Control ... 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: ... throughout the speed range This makes constant V/f method the most common speed control method of an induction motor 4.3.1 Closed Loop V/f speed control method The basis of constant V/f speed control...
Ngày tải lên: 18/12/2013, 22:06
Direct torque control of brushless DC motor with non sinusoidal back EMF
... 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 ... inductance, motor speed, snubber circuit, and the amount of load torque If a BLDC motor has an ideal trapezoidal back-EMF having a 120 electrical degree flat top, one current sensor on the dclink ... two-phase switching states of the inverter voltage space vectors for a BLDC motor Usually the overall control system of a BLDC motor drive includes three hall-effect position sensors mounted on the...
Ngày tải lên: 03/01/2014, 19:44
A park like transformation for the study and the control of a nonsinusoidal brushless DC motor
... current control schemes for PWM inverters feeding BDCM have been studied and reported in the litterature, mainly: the hysteris controller and the linear controller [ 101 In the hysteresis current control ... noise occurs In the linear control scheme, the motor currents are compared to the references and the errors are processed by PI controllers to provide a control signal for a PWM modulator Good performances ... 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 design...
Ngày tải lên: 03/01/2014, 19:44
Direct torque and indirect flux control of brushless DC motor with non sinusoidal back EMF without position sensor
... Title 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 ... 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 ... torque control of brushless DC motor based on back-EMF vector’ , ELECTROMOTION pp 128-138, 2009 [7] S B Ozturk and H A Toliyat, “Sensorless Direct Torque and Indirect Flux Control of Brushless DC Motor...
Ngày tải lên: 03/01/2014, 19:45
Direct torque and indirect flux control of brushless DC motor
... FLUX CONTROL OF BRUSHLESS DC MOTOR TABLE I SWITCHING TABLE FOR DTC OF BLDC MOTOR USING THREE-PHASE CONDUCTION indirectly kept at its optimum level, while the motor speed is less than the base speed ... instantaneously controlled by the torque controller using the integral variable structure control (IVSC) and the space-vector PWM (SVPWM) However, this technique increases the complexity of the control ... direct torque and indirect flux control (DTIFC) of BLDC motor drive using three-phase conduction Fig Experimental test-bed (a) Inverter and DSP control unit (b) BLDC motor (T e m te d = 1.28352 N·m)...
Ngày tải lên: 03/01/2014, 19:46
Direct torque control of four switch brushless DC motor with non sinusoidal back EMF
... FOR FOUR -SWITCH DTC OF BLDC MOTOR DRIVE (CCW) (a) (b) (c) factors such as sampling time, dc- link voltage, hysteresis bandwidth, motor parameters especially the winding inductance, motor speed, ... BLDC Motor Hysteresis Brake Position Encoder (b) Figure 10 Experimental test-bed (a) Four -switch inverter and DSP control unit (b) BLDC motor coupled to dynamometer and position encoder (2048 pulse/ rev) ... 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...
Ngày tải lên: 03/01/2014, 19:46
Pseudo vector control – an alternative approach for brushless DC motor drives
... the conventional control system for BLDC motor (Fig 2) The motor is fed by a PWM- controlled MOSFET inverter As we can see in Figs and 3, the currents are controlled by current controllers in stationary ... * i generation q + − + − + − Current Controller Current Controller Current Controller INVERTER * va * vb * vc Load Hall sensors Position θe eq BLDC motor PWM Measured currents ed − ia ib = −(ia ... comparison, a typical Vector Control scheme for synchronous motors (sine type machines) is depicted in Fig 1, followed by a typical Phase Current Control scheme for brushless DC motors (trapezoidal type...
Ngày tải lên: 03/01/2014, 19:46
DC motor position and speed tracking (PAST) system using neural networks
Ngày tải lên: 04/10/2015, 10:25
Bộ điều khiển số PID điều khiển DC motor
... thành loại sau: + Động điện DC kích từ nam châm vĩnh cửu + Động điện DC kích từ độc lập + Động điện DC kích từ nối tiếp + Động điện DC kích thích song song + Động điện DC kích từ hỗn hợp (Gồm cuộn ... Một phương pháp để thay đổi điện áp phần ứng điều chỉnh độ rộng xung (PWM) Định nghĩa : Phương pháp điều chế PWM (Pulse Width Modulation) phương pháp điều chỉnh điện áp tải hay nói cách khác phương ... 330R Control GND ADT1 +12v D5 1N4007 GND Control Control 2 SIL1 CONN-SIL4 ADAPTER VCC Hình 4.15 Sơ đồ nguyên lý mạch công suất Nhược điểm lớn mạch cầu H dùng BJT công suất BJT thường nhỏ, với motor...
Ngày tải lên: 23/04/2013, 14:48
PULSE CODE MODULATION
... bit and the data bits and two “stop” bits were identified It was also found that if the parity switch is on, then the 1st stop bit is changed to an even parity bit That is, the data bits plus ... bit will always be an even number (refer to figure B) B Set up Figure 8A the MSB-LSB quantization switches are to be implemented using the Sample and hold and Quantizer blocks The outputs is to ... block paramters of the quantizer encode and the decode blocks The triger signal is provided using a pulse generator figure 8A (f) Block Parameters Enabled quantizer encode Similarly the block parameters...
Ngày tải lên: 27/10/2013, 22:15
DC Motor - Content
... điện áp nuôi theo mômen tải ω1 By Lê Anh Tuấn 12/2002 DC Motor - PWM THAY ĐỔI ĐIỆN ÁP BẰNG PHƯƠNG PHÁP PWM PWM: Pulse Width Modulation V MicroController + Tần số điều chế không thay đổi Analog Filter ... 12/2002 DC Motor - Speed Control PHƯƠNG PHÁP ĐIỀU CHỈNH TỐC ĐỘ ω= U ng Kφ − R f + Ru Kφ Rf I ω ω1 Rf1 ω2 Rf2 M Ung Rư,K, φ Mt M ω Rf Ung ω1 Ung1 ω2 M Ung2 Rư,K, φ Mt M By Lê Anh Tuấn 12/2002 DC Motor ... đổi Analog Filter V* + Bề rộng xung thay đổi By Lê Anh Tuấn 12/2002 DC Motor - PWM illustration By Lê Anh Tuấn 12/2002 DC Motor - Practical1 VI MẠCH 555/556 Tạo xung nhau, tần số f = 1.49 ( RA...
Ngày tải lên: 28/10/2013, 05:15