Technical Library

Technical Library

The Application Notes section of the Teledyne LeCroy Technical Library lets you search for, browse, and print the latest technical documentation. A search aid allows you to filter documents by category or keyword.

Application Notes on this site are available in PDF format for easy download.

Application Notes

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Fundamentals of 100Base-T1 Ethernet

This application note describes the topology and frame structure of the 100Base-T1 Automotive Ethernet protocol.

SENT Basics: Verifying a Stable MTP for SENT SPC

This application note describes the SENT SPC protocol and demonstrates how to use a Teledyne LeCroy oscilloscope to verify a consistent Master Trigger Pulse (MTP) length.

Volt-second Sensing Control Analysis in a DB-DTFC with the Motor Drive Analyzer

Deadbeat-direct torque and flux control (DB-DTFC) is being explored as an alternative to field-oriented controls (FOC) or direct torque control (DTC) due to its ability to achieve fast torque dynamics, manipulate losses without compromising torque, and utilize full DC bus voltage at voltage-limited operation. Evaluating the Volt-second sensing accuracy requires a precise measurement of Volt-seconds as the reference. Teledyne LeCroy's Motor Drive Analyzer provides such capabilities over each power-semiconductor switching period.

Examining a Vehicular Propulsion Motor with the Teledyne LeCroy Motor Drive Analyzer

One road to thorough characterization and analysis of a vehicular propulsion motor and its associated drive circuitry involves use of analog torque load cells and analog tachometers to assess drive output to motor-shaft mechanical output efficiency. Whereas traditional power analyzers provide only a static mean measurement capability, Teledyne LeCroy’s Motor Drive Analyzer provides static and dynamic power analysis coupled with long acquisition times for comprehensive analysis of the motor/drive’s performance and efficiency.

Using CAN Digital Data for Speed Calculation in the Teledyne LeCroy Motor Drive Analyzer

The Controlled Area Network (CAN) serial data protocol communicates information over a serial bus in automotive and industrial applications. For motor applications, CAN data may contain digitally encoded electric motor shaft speed. The MDA extracts this encoded data, converts it to an analog value, rescales it, and then uses it in the MDA as a source for motor shaft speed.

Using a Quadrature Encoder Interface (QEI) with the Teledyne LeCroy Motor Drive Analyzer

Digital encoders, such as QEIs, provide motor shaft speed and angle feedback to motor drive control systems. The MDA can easily interpret these signals and convert them to speed and angle values that can be used for calculation of mechanical power, for comparison to a reference speed feedback signal, or for comparison to other control and power signals.