| ??? 07/12/06 20:39 Read: times |
#120124 - Micromaster Responding to: ???'s previous message |
Thats interesting Steve. AC motors are much cheaper, but as I understood, you could not get their speed down without them getting very hot. Also they get very noisy/vibrate when being controlled by triac. I have to be able to get its speed right down to near idle, and also reverse. AC motors are perfectly suited to fan operation, so Im interested; please expound more. Are these controllers expensive eg more than $US10? We look to a mass market where price is a consideration.
In case of brushless motors there is a app note I found here: http://www.intel.com/design/mc...062201.pdf Reversible and more. I am pleased to have found this article, as it gives me a good insight as to hardware required. However, I need to sense temperature too and may use my trusty AT89C2051 with the a/d port (need to sense temperature) for development, but for reliability may have to go to the AT89LP2052 with brownout or similar since its a mains jobby. Alistair. |
| Topic | Author | Date |
| Brushless DC motor /backemf sense source code? | 01/01/70 00:00 | |
| Brushless motor suitability | 01/01/70 00:00 | |
| Try IR | 01/01/70 00:00 | |
| Micromaster | 01/01/70 00:00 | |
| or any other inverter brand | 01/01/70 00:00 | |
| Of course | 01/01/70 00:00 | |
| Micromaster | 01/01/70 00:00 | |
| "AC" motor | 01/01/70 00:00 | |
| "AC" motor | 01/01/70 00:00 | |
| Motor suitability | 01/01/70 00:00 | |
| not triac control | 01/01/70 00:00 | |
| analog port of AT89C2051 | 01/01/70 00:00 | |
| microchip and motorola web sites | 01/01/70 00:00 | |
| If I recall Sie.. Infineon has a series of '51 pro | 01/01/70 00:00 | |
| Motor suitability | 01/01/70 00:00 | |
PSC motor | 01/01/70 00:00 |