Cost-Effective Miniature Incremental Encoders
Jun 23, 2010
Providing design engineers with a cost-effective, high pulse per revolution device for applications with small shaft motors, TT electronics OPTEK Technology offers a family of low-cost miniature incremental encoders....
Programmable Two-Wire Hall-Effect Sensor for Position Sensing
Jul 21, 2009
AllegroŽ A1354 programmable two-wire Hall-effect linear sensor with a pulse width modulated (PWM) output is the comapny's first linear Hall-effect sensor to include a voltage regulator, which allows the device to be powered directly from a battery....
DSP-Based 20-bit Quasi-Absolute Encoder Suits Low Speed
May 1, 2009
A high-accuracy 20-bit resolution quasi-absolute encoder with DSP-based signal processing is housed in a dc stepper motor assembly, as shown in Fig. 1....
Optocouplers Support High Power, High Speed Switching Inverters
Apr 1, 2009
For inverter applications, such as motor drives, uninterruptible power supplies, switchmode power supplies, high intensity lamp ballasts, and induction heating, the gates of insulated gate bipolar transistors must be driven with stable on and off drive voltages, and relatively high current levels to allow rapid switching between on and off conduction. Besides allowing rapid switching, high drive current is also a requirement to switch larger power of IGBT....
Copper Alloy Inductors Stabilize Current Sensing
Apr 1, 2008
For CPU VRM designs, a copper alloy features a more constant dc resistance over temperature than a traditional copper inductor, with little in the way of performance tradeoffs...
Motor Technology Upgrades Cooling Fans
Aug 1, 2006
A novel motor design and driver IC reduce Hall sensor requirements, enabling use of high-efficiency 3-phase brushless dc fans in laptops and other low-cost products....
Data Points
Jun 1, 2006
PoE Controller Integrates PD Designs Silicon Laboratories' Si3400 is described as the industry's most highly integrated, IEEE-802.3af-compliant, power...
Why Is My DC-DC Converter Too Hot?
Jun 1, 2006
The bulleted items on the front page of a dc-dc power module's data sheet often highlight electrical performance that the product cannot actually deliver...
Discrete Components Enable Bold PoE Solutions
Jun 1, 2006
Thanks to IEEE 802.3af, Ethernet data transmission lines may now conduct a specified amount of power. Enabling PoE brings a variety of advantages and...
Sensorless Motor Control Simplifies Washer Drives
Jun 1, 2006
Washing controls have used power inverters to control motor speeds for years. Variable-speed control enables a significant simplification of the mechanical...
Driving Piezoelectric Actuators
Apr 1, 2006
Extraordinarily fast devices that can produce precise motions in subnanometer increments, piezoelectric actuators make unusual demands on the power op amps required to drive them....
Data Points: March 2006
Mar 23, 2006
Chipset improves secondary-side synchronous rectification...
New Products: February 2006
Feb 1, 2006
This issue of Power Electronics Technology features battery-charger ICs, rectifiers, thick film resistors and inductors...
