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AC Motor Drives

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About AC Motor Drives

AC motor drives interface controllers to AC motors. They match the control signals (voltage and power levels) as well as the signal type (analog or digital). They also provide power conversion, amplification, and the sequencing of waveform signals. AC motor drives are used with many types of AC motors. Induction motors induce current into the rotor windings without any physical connection to the stator windings. They are suitable for many different environments and are capable of providing considerable power as well as variable speed control. Synchronous motors are no-slip devices that operate at constant speed up to full load. Subcategories include reluctance motors and permanent magnet devices such as AC servomotors. Many AC servomotors use brushless commutation with feedback provided by Hall effect sensors. Pole changing motors use pole number control, a method for changing the number of poles on the primary winding. Vector drive motors provide independent control of both the voltage and frequency, resulting in low-speed torque outputs that approach those of DC motors. In some designs, encoders or resolvers are used to provide feedback about position and speed. Linear motors generate force in only the direction of travel. Common technologies include moving coil, moving magnet, and switched reluctance designs.


Products & Services Related to AC Motor Drives

DC Motor Drives
DC motor drives act as the interface and power supply between a motion controller and a DC motor.
Motion Control Systems
Motion control systems contain matched components such as controllers, motor drives, motors, encoders, user interfaces and software. Components in these systems are optimally matched by the manufacturer.
Motion Controllers
Motion controllers range from simple linear controllers to complex, user-programmable modules that act as controllers within complex integrated multi-axis motion systems.
Motor Controllers
Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.
Motor Speed Controllers
Motor speed controllers are electronic devices that control motor speed. They carry specifications for drive type, product classification, electrical ratings, and operating parameters.
Servo Drives
Servo drives provide electrical drive outputs to servo motors in closed-loop motion control systems where position feedback and corrective signals optimize position and speed accuracy.
Stepper Motor Drives
Stepper motor drives power unipolar and bipolar stepper motors in full step, half step, and microstep motion control applications.

Engineering Web: AC Motor Drives - Machine Design

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Electric Motors & DC Motors
This section is split into the electric motor type: AC motors, DC motors, stepper motors and electrical drives.
Programmable Logic Controller (PLCS) - Servo Control -...
( PLCS ) 2 3 4 5 6 AC Motor Controllers Servo Control Accelerometers 2 3 Selecting a Motor Controller for Electrical Drives 2 3 Programmable Logic
The Switch to Switched Reluctance | Machine Design
Resources Emerson Motor Technologies, emersonmotors.com Short tutorial on SR motors by Freescale Semiconductor, tinyurl.com/5gg8p5
More >>



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