| |
| |
| |
| | Advances in servo system development ... | | The recent trend in has been to reduce cost, size and complexity of servo systems while increasing performance. High-end machining has always used the best the industry had to offer, but increasingly we are seeing a demand for higher speeds and accur... |
|
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| | Quadrature-Encoded Position and Beyond... | |
This month, Don wraps up techniques for determining angular position and turns the
discussion to sensorless control.
For some time now I've been writing about motion control and digital signal processing (DSP). Throughout our dis... |
|
| | Dynamic System Simulation... | |
High-fidelity simulations of dynamic embedded systems can be invaluable. This follow-up to "Modeling Dynamic Systems" (August 2000) presents
some techniques and algorithms you might find useful.
By Jim Ledin
In a previous arti... |
|
| | Look Ma, No Hands!... | |
Not all systems have position or velocity sensors. In those cases, consider using a stepper motor to effect sensorless control.
In my most recent columns I've detailed several motion control techniques that employ position and velocity fe... |
|
| | Sympathetic Algorithms... | |
Controlling a motor without sensors sounds hard, but it can be done. One approach is to run a sympathetic software model of the system.
Last month, I wrote about sensor-less motion control as it applied to stepper motors, as well as m... |
|
| | Palm's latest wireless wonder... | |
A look inside the Palm i705-the early-2002 replacement for the aging Palm VII-reveals an ever-cheaper design point for capable, but not necessarily blazing, data radios and their companion PDAs.
With the exception of limited circuitr... |
|
| | Get Your Motor Running... | |
Step motors are used in many devices and appliances that are part of our everyday lives. Learn some basics to start designing products with them.
Step motors are everywhere. As an embedded developer, you may have already designed ... |
|
| | Introduction to timer-based measurement... | |
Consider the issues of range, accuracy, sampling rate, and drift described here before you decide on a timer chip.
In this article, we'll explain how to use input capture timers to measure quantities from devices such as A/D converters and ... |
|
| | 'Hybrid' processor targets 'by-wire' autos... | |
BOSTON, MASS. - Motorola, Inc. today (Monday, Sept. 22nd) will unveil a "hybrid processor" with an electronic architecture that could serve as the brain for the auto industry's next-generation, by-wire products.
Known as the 56F8300 hyb... |
|
| | IC makers gear up for new tire pressure monitor rule... | |
PARK RIDGE, Ill. — The National Highway Traffic Safety Administration could be on the verge of issuing a regulation that would put a microprocessor in every new tire, paving the way for semiconductor makers to provide automakers with 80 m... |
|
| | Starter Kit supports AC and DC motors... | |
Designed to provide users with a ready-to-use motor control application, the AK-ST7FMC Starter Kit is an integrated system built around the STMicroelectronics ST7FMC microcontroller, which has a built-in, dedicated motor control peripheral. Th... |
|
| | Generate stepper-motor speed profiles in real time... | |
A new algorithm for stepper-motor acceleration allows speed profiles to be parameterized and calculated in real time. This algorithm can run on a low-end microcontroller using only simple fixed-point arithmetic operations and no data tables. ... |
|
| | Electric power steering: one good turn deserves another... | |
Did you know that the hydraulic steering system in your car siphons off somewhere between one to three miles per gallon from your vehicle's performance and consumes more energy than your car's air conditioner? In fact, it's the third highest e... |
|
| | Application-Specific MCUs focus on motor control ... | | San Jose, Calif. -- Zilog, Inc.'s thrust into the growing motor control market is its Z8 Encore! MC family, a new generation of flash MCUs targeted at sensorless Brushless DC (BLDC) and AC Induction motor control applications. Availa... |
|
| |
| | Make a PI controller on an 8-bit micro... | |
This article shows you how to implement a classical PI (proportional-integral) controller on a simple 8-bit microcontroller. To implement the PI controller, we developed specific libraries that make it possible for the microcontroller to perfo... |
|
| | DSCs boost automotive electric motor control... | |
Mechanically actuated automotive systems, such as power steering and fuel and water pumps, are being replaced with systems that utilize electric motor technology. Consequently, the presence of semiconductors in automobiles is increasing geomet... |
|
| | Motor control kit simplifies AC, DC designs to 3 kW... | |
Lexington, Mass. --STMicroelectronics' Motor Control Reference Design Kit simplifies the evaluation and implementation of 3-phase brushless direct current (BLDC) and AC drive applications across three power ranges, up to 3 kW. CAD files are ava... |
|
| |
| |
| | ARM Cortex-M3-based MCUs add flash, peripherals... | |
Austin, Tex.— Coming on the heels of the launch of its first Cortex-M3 processor-based microcontroller, Luminary Micro has added four devices to its Stellaris family. The LM3S301, LM3S310, LM3S315 and LM3S316 are available ... |
|
| | Dual-axis servoamp drives a wide range of motors... | |
Canton, Mass—Copley Controls' Model 800-1514 servo amplifier provides independent (torque) control of two brushless motors. It's compatible with universal encoder and Hall feedback systems and thus frees designers to mix and match motors... |
|
| |
| | Commentary- Brushless motors: What's not to like?... | |
To say "it's about time" would be an understatement regarding the steady, growing, newfound popularity for brushless motors. These cleaner, smaller, lighter-weight wonders are steadfastly gaining ground on their century-old brethren, brush mot... |
|
| |
| | Brushless DC motors come in many sizes... | |
maxon motor’s EC motor range is now a comprehensive programme through the addition of electronically commutated DC motors in 10 and 13 mm diameters. maxon motor offers now a complete EC motor range from ø 6 to 60 mm.
The application... |
|
| | Compact HDD motor controller also saves on power... | |
Lexington, Mass.—Citing an optimized chip partitioning scheme that extends battery life in consumer applications, STMicroelectronics' compact L7208 motor controller IC for 1.8-inch and sub-1.8-inch hard disk drives (HDDs), in an ultrathin LGA p... |
|
| |
| |
| |
| | 3-phase motor driver ICs add more power management... | |
Irvine, Calif.—Stressing high efficiency, Toshiba's three high-voltage, three-phase motor driver ICs include comprehensive power management circuitry for DC brushless motors, air conditioner fans, and pump motors.
The PWM drivers, using a high... |
|
| | Motor driver IC optimizes dual full-bridge designs... | |
Worcester, Mass.—Allegro MicroSystems' A3969, a dual full-bridge pulse-width modulated (PWM) motor IC for driving both windings of a two-phase bipolar stepper motor, feature the company's Satlington
output structure, which combines the low volt... |
|
| | Connector saves space in servomotors... | |
Santa Ana, Calif. — Providing designers with a space-saving motor connector, the CmX series servomotor interconnect system from ITT, Electronic Components may replace two traditional circular connectors for a wide range of servomotor sizes. The... |
|
| | Stand alone controller drives small BLDC motors... | |
Austin, Tex.—Freescale Semiconductor's stand alone MC34929 is suited to driving small three-phase brushless DC (BLDC) motors in consumer, portable and office equipment.
The MC34929, working from an 8- to 28-volt supply, provides up to 1 amp co... |
|
| | Dual full-bridge MOSFET driver eases motor control... | |
Worcester, Mass.—Allegro MicroSystems A3985 is a digitally programmable dual full-bridge gate driver for industrial bipolar two-phase stepper motors, two-phase brushless DC motors or two individual torque motors.
For the industrial, medical a... |
|
| | Low-cost setup minds the house... | |
To view an on-demand seminar featuring Motorola's wireless monitoring system, click here.
Motorola Inc.'s consumer arm has rolled out a product that watches over homes, businesses or other places and records events when triggered by a variety of ... |
|
| |
| |
| |
| | Dual full-bridge IC drives two DC motors... | |
Worcester, Mass.—Allegro's A3995 DMOS full-bridge PWM motor driver, for the office automation and industrial markets, provides up to 2.4 amps per output for independently driving two DC motors.
Also announced, the A3989 is designed to dri... |
|
| |
| |
| |
| | Improve Hall sensor rotor-position measurements: Part 1... | |
The presence of semiconductors in automobiles is increasing geometrically, in part due to automotive systems developers' desire for electronic motor control to address consumer requirements for safer, more efficient cars. Part of this growth in auto... |
|
| | Improve Hall sensor rotor-position measurements: Part 2... | |
Part 1 of this article described the design task required and various sources of electric motor rotor position error.
Concept overview
Let's assume a motor with three Hall sensors, but what follows can be applied to whatever number of Hall sensors.... |
|
| | Diversity comes to e-mail devices... | |
To view a full archive of approximately 250 of the industry's hottest products, go to Under The Hood
Also, if you've done your own teardowns of interesting devices and want to publish them across print and online, contact Patrick Mannion at pmann... |
|
| | 8-bit MCU supports field oriented control... | |
Munich, Germany — Infineon Technologies has introduced a family of 8-bit microcontrollers (MCUs) with field oriented control (FOC) capability and a new Digital Application virtual Engineer (DAvE) drive software configuration tool kit, which is ... |
|
| | 8-bit MCU supports field oriented control... | |
Munich, Germany — Infineon Technologies has introduced a family of 8-bit microcontrollers (MCUs) with field oriented control (FOC) capability and a new Digital Application virtual Engineer (DAvE) drive software configuration tool kit, which is ... |
|
| | PWM control IC touts input voltage range up to 75-V... | |
El Segundo, Calif.—International Rectifier introduced the IR3651, a synchronous PWM control IC designed for high-performance synchronous DC/DC buck applications with an input voltage range up to 75-V.
With programmable switching frequency up ... |
|
| | Heavy-duty connector targets motion control systems, motors... | |
Harrisburg, Pa. — Tyco Electronics Corp. has expanded its HTS heavy-duty connector series with a new range of plastic connectors for motion control, industrial machinery (e.g., transportation belts/equipment, pumps and positioning equipment) an... |
|
