This version (10 Feb 2021 04:43) was approved by Robin Getz.The Previously approved version (28 Jan 2021 19:56) is available.
Table of Contents
Dynamometer Drive System
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Features
- Electronically adjustable load – the load value is set using the onboard buttons + LCD
- Programmable step and ramp load changes
- Measurement and display of load motor phase currents
- Measurement and display of load motor speed
- External control using Analog Discovery
Block Diagram
Key Parts
| Power | |
|---|---|
| ADuM5000 | isoPower® integrated isolated dc-to-dc converter |
| ADP3335 | HIGH ACCURACY ULTRALOW QUIESCENT CURRENT, 500 mA, ANYCAP® LOW DROPOUT |
| Isolation | |
| ADUM3223 | 3 KV RMS ISOLATED PRECISION HALF-BRIDGE DRIVER, 4 A OUTPUT |
User Guide
The system is equipped with an LCD which displays information about the state of the load such and together with the 3 push buttons placed below it can be used to display and configure different system parameters. The +/- buttons are used to navigate through the system's menu and to change different system parameters, while the Enter button is used to confirm parameter changes or to enter / exit the menu screens.
| Menu diagram | Menu description |
|---|---|
 | Main menu is displayed at power up. |
| The measurement menu displays RMS phase currents and motor speed. The load can be adjusted by pressing the “+” or “-” buttons. In order to go back to the main menu press “Enter”. | |
| Waveforms menu. Select ramp or step load. In order to go back select “…” and press “Enter” |
|
| Step load menu. Select “Step” to start toggling the load. |
|
| Press “+” or “-” to toggle between the preset step values. In order to go back press “Enter” |
|
| Set maximum duty cycle. In order to go back press “Enter” |
|
| Set minimum duty cycle. In order to go back press “Enter” |
|
| Ramp load menu. Press “+” or “-” to change ramp period. In order to go back press “Enter” |
|
| Settings menu. In order to go back select “…” and press “Enter” |
|
| Change duty cycle step. |
|
| About. |
Analog Discovery™
In order interface the Dyno with the Analog Discovery™ USB Oscilloscope:
- Slide switch S2 to EXT_CTRL position
- Insert the Analog Discovery™ in P1 the connector(with the Analog Devices logo facing the user)
Two software packages are available for interfacing with Analog Discovery™:
The signals available to the Analog Discovery™ are:
| Dyno Signal | Analog Discovery channel | Description |
|---|---|---|
| I_A | Scope Channel 1 Positive | Phase A motor current (185mv/A) |
| I_B | Scope Channel 2 Positive | Phase B motor current (185mv/A) |
| PWM1 | Digital Channel 0 | Phase A PWM (3.3V levels) |
| PWM2 | Digital Channel 2 | Phase B PWM (3.3V levels) |
| PWM3 | Digital Channel 2 | Phase C PWM (3.3V levels) |
The system needs a 5V 500mA power supply. The power connector is a 2.1 X 5.5MM jack with the center pin positive(+)
Downloads
AD-DYNO1-EBZ
- Allegro Board File (This file is compressed). Get the Allegro FREE Physical Viewer (You need 16.5 or higher).
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resources/eval/user-guides/ad-fmcmotcon1-ebz/hardware/dyno.txt · Last modified: 10 Feb 2021 04:43 by Robin Getz