VACS:Projects:Hardware:LPS:PowerSupply
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<td rowspan="3" valign="top">+24</td> | <td rowspan="3" valign="top">+24</td> | ||
<td>Positive Rectifier Board</td> | <td>Positive Rectifier Board</td> | ||
| + | <td>Analog</td> | ||
| + | <td>20mA</td> | ||
<td>Analog power supply for operational amplifiers. | <td>Analog power supply for operational amplifiers. | ||
</td> | </td> | ||
| Line 35: | Line 37: | ||
<tr> | <tr> | ||
<td>Positive Regulator Board</td> | <td>Positive Regulator Board</td> | ||
| − | <td>Analog | + | <td>Analog</td> |
| + | <td>50mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 43: | Line 46: | ||
<td rowspan="3" valign="top">+9V</td> | <td rowspan="3" valign="top">+9V</td> | ||
<td>Negative Rectifier Board</td> | <td>Negative Rectifier Board</td> | ||
| − | <td>Analog | + | <td>Analog</td> |
| + | <td>20mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Negative Regulator Board</td> | <td>Negative Regulator Board</td> | ||
| − | <td>Analog | + | <td>Analog</td> |
| + | <td>50mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Positive Controller Board</td> | <td>Positive Controller Board</td> | ||
| − | <td>Analog | + | <td>Analog</td> |
| + | <td>50mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td rowspan="3" valign="top">+5V</td> | <td rowspan="3" valign="top">+5V</td> | ||
<td>Power Supply Controllers</td> | <td>Power Supply Controllers</td> | ||
| − | <td>Digital | + | <td>Digital</td> |
| + | <td>100mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>LPS Master Controller</td> | <td>LPS Master Controller</td> | ||
| − | <td>Digital | + | <td>Digital</td> |
| + | <td>50mA</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>LPS LCD Panel</td> | <td>LPS LCD Panel</td> | ||
| − | <td>Digital | + | <td>Digital</td> |
| + | <td>100mA</td> | ||
</tr> | </tr> | ||
</table> | </table> | ||
Revision as of 23:27, 29 November 2006
Contents |
Description
The power supply controllers and the master power supply board need themselves a power supply. To drive the output power supply transistors a specific power supply is used, this increases the rejection of the output loads and their mutual interactions.
LPS Power Supply
Positive Power Supplies
- Positive Rectifier Board
- The positive rectifier board needs a power supply for the AOP that measure the output currents. These AOP need a +24V and a -5V supply to ensure that the output can vary between 0 and +5V (while the inputs can reach 10/15V).
- Positive Power Supply Controller
- The controller contains an ATMega8 controller, several AOP and a voltage reference. The AOPs need a +9V and -5V supplies as their outputs need only be in the 0..+5V range. The voltage reference generates a +5.000V from the +9V. The board must also drive the two relays which are in the rectifier board. The relays are driven by +5V and -5V (dV = 10V).
- Positive Voltage Regulator
- The voltage regulator drives the output power transistors using several AOPs. The AOPs must be capable of having an output in the range 0..+20V. For this they need a +24V and a -5V supply.
Negative Power Supplies
- Negative Rectifier Board
- The negative rectifier board is similar to the positive rectifier board but the AOPs need a -24V and a +9V supply. The AOPs outputs are in the 0..+5V range and the inputs may be as low as -10/-15V.
- Negative Power Supply Controller
- This is similar to the positive power supply controller.
- Negative Voltage Regulator
- The voltage regulator drives the output power transistors using several AOPs. The AOP must have the outputs that vary between 0 and -20V. They need a -24V and a +9V supply.
Master Controller
- LPS Master Controller
- The master controller contains the ATmega8 controller, drives the LCD panel, a relay and the fans. The relay and fans are connected to the +5V and -5V.
The power supply controllers and the master power supply board need themselves a power supply. A positive power supply controller uses the following supplies:
LPS Power Supply Regulation
To obtain the LPS power supplies we use the toric transformer of the positive power supply. The +24V and -24V are obtained by a voltage multiplier from the 2x9V toric transformers. In theory it can reach 36V so the decoupling capacitor is chosen to support at least 50V.
LPS Power Supply Summary
| +24 | Positive Rectifier Board | Analog | 20mA | Analog power supply for operational amplifiers. |
| Positive Regulator Board | Analog | 50mA | ||
| +9V | Negative Rectifier Board | Analog | 20mA | |
| Negative Regulator Board | Analog | 50mA | ||
| Positive Controller Board | Analog | 50mA | ||
| +5V | Power Supply Controllers | Digital | 100mA | |
| LPS Master Controller | Digital | 50mA | ||
| LPS LCD Panel | Digital | 100mA |
