Harmonics are voltages or currents caused by non-linear loads on a power supply. Harmonic frequencies occur at integer multiples of a fundamental frequency and are superimposed on the fundamental voltage or current waveform, creating a distorted waveform. Harmonics are classified first by their order, or the integer multiple of the fundamental frequency. For example, for […]
Drives + Supplies
Why do servo drives use PWM and how does it work?
The basic function of a servo drive is to convert, or amplify, low-power signals from the controller into higher-power signals to be delivered to the motor windings. Servo drives (also referred to as servo amplifiers) can be either linear or switching types, depending on how power is delivered to the motor from the switching devices […]
When is dither helpful in motion control systems?
Dither is one of several terms used to describe small, rapid, back-and-forth movements of an object. Depending on the context, when the term “dither” is used in motion control systems, it can refer to purposeful, commanded movements or to unintended, unwanted motion. In some motion systems, dither is purposely induced to reduce the effects of […]
What is an observer in motion control and how does it affect performance?
A servo control loop uses sensor feedback to determine whether the system’s actual state (position, velocity, or torque) matches the commanded state. But sensors feedback isn’t perfect — even high-quality encoders and sensors can introduce noise, phase lag, and other errors in measurement. One way to improve the feedback of a servo control system is […]
New enclosed drive series for industrial pump, fan and compressor use in harsh environments
A new enclosed drive system from Siemens, the SINAMICS G120XE, is designed specifically for the demands of industrial pump, fan and compressor applications in a wide variety of markets. Built around the company’s SINAMICS G120X infrastructure drive, this new enclosed system is ideal for fast design and commissioning in industries such as oil-and-gas/petrochemical, water/wastewater, power […]
New drive system from Bosch Rexroth is compact and scalable
Bosch Rexroth’s new ctrlX DRIVE is a compact, scalable and consistent modular drive system. ctrlX DRIVE has space-saving dimensions of up to 50% and can provide tailored solutions with peak currents of 6 to 375 A. Components in the ctrlX DRIVE system can be combined freely with one another, giving designers virtually unlimited combination options. […]
New family of servo systems from AutomationDirect
SureServo2 servo systems, built from motor, drive, I/O breakout module, and cable set components, are now available from AutomationDirect. The SureServo2 offering includes high-powered systems (up to 15 kW), wide input power options (110 Vac or 220 Vac in single or three phase), and a host of additional hardware and software features. The built-in motion […]
Danfoss’ new VLT AutomationDrive EZ FC 321
Designed for basic drive applications with a low number of variants, quick and easy delivery, and plug-and-play convenience, the VLT AutomationDrive EZ FC 321 is built for ease of use. The new Danfoss VLT AutomationDrive EZ FC 321 provides variable speed control of all asynchronous and permanent magnet motors, on any industrial machine or production […]
Koford Engineering introduces 45 amp 48 volt digital sensorless drive
Koford Engineering LLC has introduced a new 45 amp 48 volt sensorless drive with unique characteristics. This drive can operate over a 80:1 speed range, mush broader then the usual 3:1 to 5:1. It also features ultra low EMI. It has a 99% efficiency and operation up to 200,000 rpm with a two pole motor […]
New distributed drive system designed for conveyor applications
The Sinamics G115D from Siemens is a new compact and powerful drive system specifically designed for horizontal conveyor applications. The drive system comprises the motor, drive and gearbox in one unit and is offered in two versions — wall-mounted and motor-mounted. The Sinamics G115D drive system features a robust design with a high IP protection […]
