Variable frequency drives use a technique referred to as pulse-width modulation (PWM) to provide voltage of varying frequency to an AC induction motor. The inverter, or output, stage of the VFD uses insulated gate bipolar transistors (IGBTs) that switch on-and-off rapidly, creating trapezoidal pulses of varying width to simulate AC sinusoidal voltage. But the windings in […]
Multi-axis servo system features oversampling technology
The AX8000 multi-axis servo system from Beckhoff now offers oversampling technology in addition to extremely high dynamics and μsec cycle times. Oversampling technology via EtherCAT enables process data scans several times within a communication cycle. This significantly boosts performance for precision processing machines and other systems that require evaluation of high-resolution measured values. With the […]
What are drive isolation transformers and how do the differ from line reactors?
A variable frequency drive alters the speed of an AC induction motor by rectifying incoming AC power to DC, storing the DC power in a bus, and then converting the DC power back to AC at the voltage and frequency required to meet the load demands. Although this matching of the motor speed to the […]
maxon, ANYbotics enter into strategic partnership for robotic drive systems
Drive specialist maxon is joining forces with the robotics startup ANYbotics to supply the drive systems for the autonomous ANYmal inspection robot, which will soon be available on the market. This cooperation will also benefit maxon, since ANYbotics provides important robotics know-how and is currently the most successful young company in this field. maxon and […]
Single and three-phase SR35 series soft starters from AutomationDirect
More fully digital soft starters have been added to the AutomationDirect drives and motor controls lineup. STELLAR® SR35 series full-featured solid-state soft starters are available in three frame sizes to control both 1-phase and 3-phase AC induction motors with 24VDC control voltage (optional 110-230 VAC). Designed for 17-361 full-load amps at 110-240 VAC (1-phase) or […]
Brochure highlights drive technology for medical applications
A new publication from FAULHABER titled “Drive Systems for Healthcare, Medical & Laboratory Equipment” presents medical technology applications and the corresponding optimum drives and accessories. The coronavirus and the disease it causes, COVID-19, continue to have the world firmly in its grip. The number of people who have fallen ill and who have tested positive […]
Breaking the old rules of inertia matching for servo applications
Modern servo drives with advanced tuning capabilities — when paired with performance servo motors having high-resolution feedback — can eliminate load-to-motor inertia-mismatch concerns. By the Kollmorgen engineering staff The accepted principle of matching motor to load inertia is no longer pertinent with today’s faster motion-control processors and advanced control algorithms. This outdated inertia-matching method of […]
How custom BLDC motors boost performance and lower costs
From packaging to communications, BLDC servomotors are gaining market share in a variety of industries — and for good reason. They deliver high torque and smooth rotation (with minimal torque ripple) and lend themselves well to cost-saving customization. By Ralph Adams • President | Orbex Group Design engineers typically rely on off-the-shelf brushless dc (BLDC) […]
Elmo Motion Control’s new Platinum Safe Servo drives boost servosystem performance
Elmo Motion Control, a manufacturer of innovative motion control technologies, now offers a new cutting-edge line of servo drives — the Platinum series of servo drives featuring advanced servo functionality and functional safety. An evolution of Elmo’s Gold line of servo drives, the new line of servo drives is designed to meet OEMs’ growing needs […]
Soft starters from Siemens feature integrated Safe Torque Off function
The SIRIUS 3RW55 Failsafe soft starters from Siemens are the first to feature the integrated Safe Torque Off (STO) function. This ensures that the motor comes to a complete standstill if an operator initiates an emergency shutdown. The motor then remains in this state until the restart interlock is used to restart it. Another important […]
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