motor speed control pwm

Ngày tải lên: 18/12/2013, 22:06

... 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 ... 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 ... (armature) of the motor is available to drive an external load. DC motors are widely used in numerous control applications because of features such as high torque, speed controllability over...

Ngày tải lên: 25/01/2014, 13:20

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 28/12/2013, 22:07

...  Overview of Gas Springs 2 . 21369 . 2007 . 1  Speed Control TM « SPC Gas Springs, cushioned 2486.12. FIBRO SPC Gas Springs Speed Control TM « 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 « SPC Gas Springs, 2486.12. cushioned subject to alterations Force in daN at Piston...

Ngày tải lên: 22/01/2014, 02:20

Ngày tải lên: 16/03/2014, 12:20

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 29/06/2014, 09:20

... 3.1. The basic control format In essence, we are endeavoring to design a controller that can vary the torque induced in the rotor of the motor. To do this, the induction motor controller will ... generator of the DSP controller. The DSP controller will manipulate this control signal to produce signals that the induction motor can operate off. These signals will be converted to PWM (Pulse-Width ... for an induction motor An induction motor is an asynchronous AC (alternating current) motor. The least expensive and most widely used induction motor is the squirrel cage motor. The major...

Ngày tải lên: 27/10/2013, 23:15

Ngày tải lên: 13/12/2013, 00:56

Ngày tải lên: 13/12/2013, 03:40

Ngày tải lên: 17/12/2013, 18:06

... da Silva, and M. P. Kazmierkowski, “A neural network based space vector PWM controller for voltage-fed inverter induction motor drive,” IEEE Trans. Ind. Applicat., vol. 36, pp. 1628–1636, Nov./Dec. ... Pinto, B. K. Bose, and L. E. B. da Silva, “A stator flux oriented vector-controlledinduction motor drive with space vector PWM and flux vector synthesis by neural networks,” IEEE Trans. Ind. Applicat., ... paper awards. MONDAL et al.: A NEURAL-NETWORK-BASED SPACE VECTOR PWM CONTROLLER 663 III. N EURAL -N ETWORK -B ASED S PACE -V ECTOR PWM The derivation of turn-on times and the corresponding functions,...

Ngày tải lên: 22/12/2013, 08:16

Ngày tải lên: 25/12/2013, 05:17

... comparator circuits. FIGURE 13: Block Diagram of a Sensorless BLDC Motor Control. 3-Phase Inverter Bridge PIC18FXX31 PWM5 PWM4 PWM3 PWM2 PWM1 PWM0 A C B V REF_A BACK EMF ZERO-CROSSING COMPARATOR CIRCUITS ... Inc. BACK EMF CONTROL METHOD The back electro-magnetic-force (EMF) or sensorless motor control method obtains the speed and position of the motor directly from the voltage at the motor windings. ... Parekh, Rakesh, “AN889 - VF Control of 3- Phase Induction Motors using PIC16F7X7 Microcontrollers”, Microchip Technology Inc., 2003. 10. Valentine, Richard, editor, Motor Control Elec- tronics Handbook”,...

Ngày tải lên: 03/01/2014, 18:55

... Operation modes of buck boost converter 2 Unlike constant -speed control, a variable -speed control can adjust the speed of the turbine as the wind speed changes, so as to operate at the peak of the ... proposed MPPT control method. Fig.7: Wind turbine output power without MPPT control method for low wind speed. Fig.8: Wind turbine output power with MPPT control method for low wind speed. ... low wind speeds. Fig.9 : Wind turbine output power without MPPT control method for high wind speed. Fig.10 : Wind turbine output power with MPPT control method for high wind speed. ...

Ngày tải lên: 03/01/2014, 19:15

... available at various wind speeds, two different control algorithms are normally applied to the VSWT: pitch angle control and speed (torque) control. The pitch control algorithm is used to ... converter LOAD P electSpeed Duty ratio VSWT Aero dynamical / Mechanical unit MPPT LPPT Operator Controller speed d Control strategy VSWT Control unit VSWT Electrical unit Fig. 1. Control concept ... two optimum wind turbines power/torque versus speed characteristics. Two control loops: inner feed forward current control loop and outer voltage control closed loop are applied for the non-inverting...

Ngày tải lên: 03/01/2014, 19:15

Ngày tải lên: 03/01/2014, 19:44

Ngày tải lên: 03/01/2014, 19:44

... Block scheme of FL controller, (b) control surface of con- ventional PI controller, (c) control surface of FL controller; comparison of current-tracking performance with PI and FL controller: (d) ... follows. 1) VS PWM inverters a) AC motor control: This requires a wide range of output frequency, variable ac-side voltage (motor EMF), high dynamic, decoupled – control structure, operation in PWM/ square-wave ... derivative are the FL controller input crisp values. The reference voltage for the PWM modulator are the FL-CC crisp output commands When an FL controller is used as a current controller, the tracking...

Ngày tải lên: 03/01/2014, 19:45