1. Boom Electronics Board (BEB) Engineering Peer Review Oct
Boom Electronics Board (BEB) Engineering Peer Review Oct. 15, 2003 Stewart Harris, Hilary Richard

2. Functional Requirements
BEB Requirements
Functional Requirements
Spin Plane Booms, for each provide:
Floating Ground Driver
“Bias”, “Stub”, “Usher” programmable potentials
“Braid” programmable, switchable potential
AC test signal source
Axial Booms, for each provide:

3. BEB Requirements, con’t.

4. BEB Analog Electronics

5. Bias Driver Heritage Design CLUSTER, POLAR, FAST
Minor changes in parts selection and DAC

6. BEB Block Diagram

7. Braid Bias

8. Preliminary PCB Layout

9. BEB PCB Assembly

10. Completed BEB Breadboard
BEB Design Status
Completed BEB Breadboard
Verified parts selection
Full characterized w.r.t. DC gain and AC response
Available for testing with Preamp prototypes
Engineering Model
BEB schematic completed
PC board layout in progress
Actel design specification in progress

11. Spin Plane Boom Motor Driver
BMD Requirements
Brushless DC Motor driver
Sense rotor position with Hall Effect devices
Drive stator coils based on commutation logic
Supply voltage: 28 ± 6 Volts
Load current: ~300mA
Higher radiation environment than IDPU (100krad)
Short term exposure (6 months)

12. BMD Block Diagram
Motor Driver Board
Brushless Gearmotor

13. Additional slides included:
BEB / BMD Add’l Info
Additional slides included:
Floating ground driver schematic
Boom Motor Driver breadboard schematic

14. Floating Ground Driver
Heritage Design
CLUSTER, POLAR, FAST
Minor changes in part selection

15. BMD Breadboard Schematic