Go to GlobalSpec.com Home
Newsletter   FREE GlobalSpec e-Newsletters
Receive the latest news, trends, and technology relevant to your work.
(See Titles)

Designing a Base Station Coil for the HCS410

From Microchip Technology, Inc.
 

 
This application note describes the Excel spreadsheet to design base station coils. The spreadsheet file name is basestaxls. The basic approach used is to choose the driver circuit driving voltage and current. These two values are used to calculate the total resistance that the series resistor-inductor-capacitor (RLC) circuit should have. Secondly, the resonating capacitor rated voltage is chosen. The coil inductance and resonating capacitor value can then be calculated. For a given coil inductance and coil resistance, choos-ing the coil average diameter and coil winding aspect ratio determines the coil dimensions, number of turns and wire diameter. The magnetic field strength can be calculated at any given distance given the coil average diameter, number of turns and coil current.
Product Announcements
American Microsemiconductor, Inc. - COMMON DIODE APPS: Steering & free-wheeling by AMS
Diodes are frequently referred to by their function in a circuit rather than their parameters or part number. Two examples are parts ordered as free- wheeling or as steering. These terms do not... (read more)
Filtronetics, Inc. - Coils
FILTRONETICS, Inc. offers an extensive line of Coils, Custom Coils, Standard Coils, Solenoids, Custom Solenoids, and Inductive Products Including RF Toroidal Solenoids, Power Toroidal Inductions,... (read more)
GIGAVAC - 8 kV, 25 A Low Profile for DC carry –GIGAVAC GH2
Small high current carry DC single pole double throw (SPDT) high voltage relay solves many of the high-density packaging problems encountered with other high voltage relays. At only 24.2 mm in... (read more)
GIGAVAC - 3.5 kV hi current capacitive discharge relay - GH5
SF6 Gas filled relay for high current capacitive discharge "make" applications where low and stable leakage current is required. This is the same as our rugged GH3 relay except gas filled. The low... (read more)
Syfer Technology Limited - Hermetically sealed EMI filters
Just announced by Syfer Technology is the SL range of EMI filters featuring hermetic construction, wound coil inductors and iron powder cores for improved insertion loss performance at high current... (read more)
Megger - Programma TM 1600 Circuit Breaker Analyzer System
The TM1600 circuit breaker analyzer measures a circuit breaker's timing cycle. The timing channels record closings and openings of main contacts, resistor contacts and auxiliary contacts. (read more)
Baker Instrument Company, an SKF Group Company - D15R D65R Surge HiPot Resistance Tester
The D15R/65R brings you the latest innovations in the testing of electrical insulation systems. Specifically designed for shop or field performance, this digital instrument provides a cost effective... (read more)
Aremco Products, Inc. - AREMCOLOX 502-400 MACHINABLE GLASS-CERAMIC
Aremcoloxtm 502-400, a new machinable glass-ceramic available from Aremco Products Inc., is now used to produce thermally insulative and high dielectric components and fixtures used in electrical and... (read more)
Topics of Interest
12.7 QUALITY FACTOR OR Q-FACTOR (a) Q of a Coil. Every inductor possesses a small resistance in addition to its inductance. The lower the value of this resistance R, the better the quality of the... (Read More)
Much of the current resonant converter development effort seems to be for half-bridge topologies, which will now be considered. The following discussion is based on a classic article by R. (Read More)
Overview While direct-current (dc) systems are essentially "stuck" with the source voltage (with only a very few exceptions), alternating-current (ac) systems offer great flexibility in voltage due... (Read More)
Figure E.1 shows the construction of a Rogowski coil, an air-core current transformer that is especially well suited to measuring ripple currents in the presence of a DC component or measuring pulsed... (Read More)
The core selection procedure is as follows: Step 1     A tentative core selection will be made with an Ae large enough... (Read More)