TAILIEUCHUNG - ELECTRICAL DRIVES

Magnets are pieces of metal that have the ability to attract other metals. Every magnet has two poles: a north and a south. Much like electrical charges, two similar magnetic poles repel each other; while opposite magnetic poles attract each other. Magnets have a continuous force around them that is known as a magnetic field. This field enables them to attract other metals. Figure 1 illustrates this force using bar and horseshoe magnets. | A phase-controlled cycloconverter can be used for speed control of an ac machine (induction or synchronous type). Figure 8 shows a drive using a three-pulse half-wave or 18-thyristor cycloconverter. Each output phase group consists of positive and negative converter components which permit bidirectional current flow. The firing angle of each converter is sinusoidally modulated to generate the variable-frequency, variable-voltage output required for ac machine drive. Speed reversal and regenerative mode operation are easy. The cycloconverter can be operated in blocking or circulating current mode. In blocking mode, the positive or negative converter is enabled, depending on the polarity of the load current. In circulating current mode, the converter components are always enabled to permit circulating current through them. The circulating current reactor between the positive and negative converter prevents short circuits due to ripple voltage. The circulating current mode gives simple control and a higher range of output frequency with lower harmonic distortion.

• Điện - Điện tử
• Magnetics
• Induction Machines
• Synchronous Machines
• Line Controlled Rectifiers
• nverters
• DC motors
• Basic Magnetics
• Materials
• Manufacturing Methods
• Electronically
• Drives and Controls
• Electric machinery fundamentals
• Electric machinery
• Synchronous motors
• Induction motors
• DC machinery fundamentals
• DC motors DC and generators
• Special purpose motors
• Journal of Automation and Control Engineering
• Closed loop speed control of miniature brushless DC motors
• Closed loop speed control
• Miniature brushless DC motors
• Delta Connected BLDC motors
• Motor Control
• electric motor
• motors work
• Electromagnets
• Brushless DC Motors
• Control Circuits
• Control Circuits
• Review of physics
• Physics of rotation
• AC induction Motors
• Single phase
• DC Brush Motors
• DC motors and generators
• The universal motor
• The equivalent circuit
• Introduction to DC motors
• Lecture Automatic control systems technology
• Bài giảng Công nghệ hệ thống điều khiển tự động
• Automatic control systems technology
• Transfer functions of DC motors
• Steady state model
• Torque current curve
• kỹ thuật
• công nghệ
• cơ khí
• chế tạo máy
• động cơ điện 1 chiều không cổ góp
• DC machines
• Variable reluctance machines
• Stepping motors
• Single and two phase motors
• Introduction to power electronics
• Speed and torque control
• Xác định momen
• momen thiết kế
• kiến thức về môtô
• thiết kế mô tô
• cấu tạo mô tô
• MACHINERY PRINCIPLES
• AC MACHINERY FUNDAMENTA
• ERRATA FOR ELECTRIC MACHINERY
• automotive applications
• microsystems technology
• pneumatic mechanisms
• industry processes
• require controllers
• servo drive
• drive sizing
• sufficient load thrust
• acceleration
• torque regulation requirements
• Ebook Electrical machine
• Polyphase Induction Machines
• Two Phase Motors
• Three Phase Circuits