tailieunhanh - Chapter 4: Drive Control

Chapter 4: Drive Control content presentation motor drive control, motor drive control, analysis of and set up of a speed controller. Invite you to consult. | CHAPTER 4 Drive Control SB IBs 1 GENERAL 103 SB IBs 2 . MOTOR DRIVE CONTROL 105 SB Illi 3 . MOTOR DRIVE CONTROL 114 ill 4 ANALYSIS OF AND SET UP OF A SPEED CONTROLLER 116 1 GENERAL THE IDEAL CONTROL SYSTEM Many applications exist where something has to be controlled to follow a reference quantity. For example the speed of a large motor may be set from a low-power control signal. This can be done using a variable-speed drive as shown in Figure . Ideally the relationship between the reference and the motor speed should be linear and the control system should respond instantly to changes in the reference. Any control system can be represented as shown in Figure with an input reference signal in this case a speed reference a transfer function G and an output in this case the speed of rotation of the motor shaft w. For the system to be ideal the transfer function G would be a simple constant so that the output is proportional to the reference with no delay. OPEN-LOOP CONTROL Unfortunately the transfer function of many systems is not a constant and so without any form of feedback from the a mains power supply Figure Variable-speed drive and motor 104 General Open-Loop Control output to correct for the nonideal nature of the transfer function the output does not remain proportional to the control signal. Using an induction motor supplied by a simple open-loop variable-speed drive as an example the following are some unwanted effects that can occur in control systems. Regulation The output of a simple open-loop drive can be a fixed frequency which is proportional to the speed demand signal. Therefore the frequency applied to the motor remains constant for a constant speed demand. However the speed of the motor drops as load is applied because of the characteristic slip of an induction motor and so the speed does not remain at the demanded level. Instability It is possible under certain load conditions and at certain frequencies for the motor speed to .

• Điện - Điện tử
• Chapter 4 drive control
• A
• C motor drive control
• D
• C motor drive control
• Dicrect torque control
• The ideal control system
• Open loop control
• Lecture Control system engineering
• Control system engineering
• Open‐loop systems
• Closed‐loop systems
• Frequency response analysis
• Time response analysis
• Chapter 5 scalar control methods
• Scalar control methods
• Introduces two inductance
• Scalar torque control
• Two inductance equivalent circuits of the induction motor
• Open loop scalar speed control
• Lecture Automatic control systems technology
• Bài giảng Công nghệ hệ thống điều khiển tự động
• Automatic control systems technology
• Nyquist stability criteria
• Plot complex numbers
• The open loop transfer function
• Nuclear engineering and technology
• Dynamics and control of molten salt breeder reactor
• Molten salt breeder reactor
• Load following maneuvers
• The open loop load following capability
• CONTROL SYSTEMS
• Motion Interpolation
• Open Loop Motion
• Computer Aided Emulation
• Mechanical Components
• Electronic System Components
• Electronic Engineering
• Active Power Filter
• DC link voltage
• Insulated gate bipolar transistors
• Open loop voltage
• Sinusoidal pulse width modulation
• Three phase three wire