Difference between revisions of "RC08Power"

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==Tasks==
 
==Tasks==
−
*[ ] Finalize specs on voltages, maximum current draw, and allowable frequencies
+
*[X] Finalize specs on voltages, maximum current draw, and allowable frequencies
−
*[ ] Select a part based on the spec
+
*[X] Select a part based on the spec
−
*[ ] Determine how to mount batteries
+
*[X] Determine how to mount batteries
−
*[ ] CAD the design
+
*[X] CAD the design
−
*[ ] Verify the design
+
*[X] Verify the design
−
*[ ] Fabricate
+
*[X] Fabricate Prototype
  
 
==Specifications==
 
==Specifications==
Line 17: Line 17:
 
* Frequency does not interfere with other electronics
 
* Frequency does not interfere with other electronics
 
* Protection Circuitry (TVS:Transient Voltage Suppression)
 
* Protection Circuitry (TVS:Transient Voltage Suppression)
−
* [[RC08PowerSupplies | Matrix of Potential Power Supplies]]
 
  
−
====Parts and Supplies====
+
====Specification====
 
{| style="text-align:center;" cellspacing ="0" cellpadding="1"
 
{| style="text-align:center;" cellspacing ="0" cellpadding="1"
 
|-
 
|-
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| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |  
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 1 mA + 12*n mA <br> n pins high
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 8 mA typ <br> 12 mA max
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |  
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 8 mA typ <br> 27 mA max
  
 
|-
 
|-
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| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |  
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 15 mA max
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 15 mA max
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
  
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|-
 
|-
 
! style="border:0.5px solid black; border-bottom=0px; background:white;" | FET Drivers (each)
 
! style="border:0.5px solid black; border-bottom=0px; background:white;" | FET Drivers (each)
−
| style="border:0.5px solid black; border-bottom=0px; background:white;" | 8mA
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 9mA
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |
 
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
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|-
 
|-
 
! style="border:0.5px solid black; border-bottom=0px; background:white;" | FET Drivers (total)
 
! style="border:0.5px solid black; border-bottom=0px; background:white;" | FET Drivers (total)
−
| style="border:0.5px solid black; border-bottom=0px; background:white;" | 120mA
+
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 45mA
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
 
 +
|-
 +
! style="border:0.5px solid black; border-bottom=0px; background:white;" | Maxon Halls
 +
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | ??
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
 
 +
|-
 +
! style="border:0.5px solid black; border-bottom=0px; background:white;" | Micro Mo Halls
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | ??
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 +
 
 +
|-
 +
! style="border:0.5px solid black; border-bottom=0px; background:white;" | Kicker Board
 +
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" | 4A (when <br> charging)
 +
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
−
| style="border:0.5px solid black; border-bottom=0px; background:lightblue;" |
 
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
 
| style="border:0.5px solid black; border-bottom=0px; background:white;" |  
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|}
 
|}
 +
 +
The FPGA has between a 2.5K and a 10K pullup, and between a 4K and 34.5K pulldown. Thus, the bus pins (D0-D7) are expected to draw max ~1 mA when driven into the FPGA.
 +
 +
==== Parts and Supplies ====
 +
 +
* 3V3 @ 3 A supplies all linear regulators
 +
* 2V5
 +
* 1V8
 +
* 1V2
  
 
====Battery====
 
====Battery====
 
* Packs need to be configured to give out 12V
 
* Packs need to be configured to give out 12V
 
* Orientation and number need to be spec'd by both EE and ME
 
* Orientation and number need to be spec'd by both EE and ME
−
* Possible on-board charger?
+
* <strike>Possible on-board charger?</strike> maybe in 2009
 
* Battery health monitor
 
* Battery health monitor
 +
* Affordable
 +
 +
Similar to last year, we will probably go with NiMh batteries because we cannot afford Li*.
 +
 +
Quick notes on available batteries
 +
 +
Tenergy Batteries have done well (enough) in [http://www.my3cents.com/showReview.cgi?id=13300 tests], and the [http://www.google.com/search?q=tenergy+review internet] seems to think they are ok.
 +
* [http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1350 2600 mAh AAs] 20 pcs @ $24 free shipping and a travel charger
 +
* [http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1342 2300 mAh AAs] 20 pcs @ $26 with solder tabs
 +
 +
Supposedly these coupons "tenergy2547" and "septspecials" can save us 10% from [http://forums.slickdeals.net/showthread.php?sduid=0&t=602086 this] slickdeals post.
 +
 +
This coupon "tenergydeals" will supposedly get free shipping.
 +
 
==Schematics==
 
==Schematics==
−
Schematics
+
<gallery>
 +
Image:RC_08_pwr_supp.jpg|Power Supply Schematic for Rev1
 +
</gallery>
 +
 
 
==Parts==
 
==Parts==
 
====Power Supply====
 
====Power Supply====
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<br>
 
<br>
 
*[[RoboCupElectrical|Electrical System]]
 
*[[RoboCupElectrical|Electrical System]]
 +
 +
[[Category: RC Electrical]]
 +
 +
[[Category:2007-2008]]

Latest revision as of 21:01, 24 May 2020

The 2008 power supply circuit uses the same switching topology as the 2007 system with some changes, most notably a jump in system voltage to 12V from 9V to support the new motors. Another change is more analysis in the design phase including looking at possible interference with the radio and other devices that use oscillators.

Tasks

  • [X] Finalize specs on voltages, maximum current draw, and allowable frequencies
  • [X] Select a part based on the spec
  • [X] Determine how to mount batteries
  • [X] CAD the design
  • [X] Verify the design
  • [X] Fabricate Prototype

Specifications

Power Supply

  • 12V operation
  • Small package
  • Low inductance
  • High allowable RL (so we can use smaller inductors)
  • Frequency does not interfere with other electronics
  • Protection Circuitry (TVS:Transient Voltage Suppression)

Specification

Part VBatt 5V 3.3V 2.5V 1.8V 1.2V
FPGA 1 mA + 12*n mA
n pins high 		8 mA typ
12 mA max 		8 mA typ
27 mA max
ARM 15 mA max 15 mA max
HP3 RX
HP3 TX
FET Drivers (each) 9mA
FET Drivers (total) 45mA
Maxon Halls ??
Micro Mo Halls ??
Kicker Board 4A (when
charging)

The FPGA has between a 2.5K and a 10K pullup, and between a 4K and 34.5K pulldown. Thus, the bus pins (D0-D7) are expected to draw max ~1 mA when driven into the FPGA.

Parts and Supplies

  • 3V3 @ 3 A supplies all linear regulators
  • 2V5
  • 1V8
  • 1V2

Battery

  • Packs need to be configured to give out 12V
  • Orientation and number need to be spec'd by both EE and ME
  • Possible on-board charger? maybe in 2009
  • Battery health monitor
  • Affordable

Similar to last year, we will probably go with NiMh batteries because we cannot afford Li*.

Quick notes on available batteries

Tenergy Batteries have done well (enough) in tests, and the internet seems to think they are ok.

Supposedly these coupons "tenergy2547" and "septspecials" can save us 10% from this slickdeals post.

This coupon "tenergydeals" will supposedly get free shipping.

Schematics

  • Power Supply Schematic for Rev1

Parts

Power Supply

Quick Specs
Data Sheet

Battery

Quick Specs
Data Sheet

Articles

Links


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