This version (28 Jan 2021 19:59) was approved by Robin Getz.The Previously approved version (21 Jul 2015 09:18) is available.
Table of Contents
Low Voltage Drive Board
Features
- Connects to the Controller board and has a power stage that can drive motors up to 48V and 20A.
- Drives 2 motors simultaneously
- High frequency drive stage implemented with ADI isolated gate drivers
- Supported motor types
- BLDC
- PMSM
- Brushed DC
- Stepper (bipolar / unipolar)
- Integrated over current protection
- Reverse voltage protection
- Current and Voltage measurement using isolated ADCs
- Current measurement on 2 phases for 2 motors
- DC Link Voltage measurement
- BEMF zero cross detection for sensorless control of PMSM or BLDC motors
- Separate voltage supplies for the 2 motors so that the motors don’t influence each other
Block Diagram
Picture and Main Components
Key Parts
| Measurement | |
|---|---|
| AD7403 | 16 bit isolated 2nd order Sigma-Delta modulator |
| AD8207 | Zero drift, high voltage, bidirectional difference amplifier |
| CMP04 | Quad low power, precision comparator |
| Power | |
| ADuM5000 | isoPower® integrated isolated dc-to-dc converter |
| ADP1621 | Constant-frequency, current-mode step-up dc/dc controller |
| ADP2301 | 1.2 A, 20 V, 1.4 MHz non-synchronous step-down switching regulator |
| MOSFET Drivers | |
| ADuM5230 | Isolated half-bridge driver with integrated high-side supply |
| ADuM7223 | Isolated precision half-bridge driver, 4.0A output |
Switches
Emergency Stop switch
- S2 is a latching emergency stop switch.
- If triggered the supply for the power stage is turned off.
Reset switch
- S1 is a reset switch for the emergency stop latch.
- By pressing S1 when S2 is not pressed the power stage is turned on.
Downloads
AD-DRVLV2-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-fmcmotcon2-ebz/hardware/lv_board.txt · Last modified: 28 Jan 2021 19:56 by Robin Getz