| ??? 02/13/08 14:13 Read: times |
#150740 - Driver protection Responding to: ???'s previous message |
An H bridge driver usually only needs diode clamps to protect the output devices from inductive spikes and motor back EMF. For such a low power motor, general purpose 1A diodes should do.
An RC snubber may be needed to suppress RF emissions from resonances linked to the motor inductance. I normally start with a value of 110 ohm for the resistor and try different capacitor values whilst looking at the switching transient on an oscilloscope. |
| Topic | Author | Date |
| Snubber values in motor drives?? | 01/01/70 00:00 | |
| Always ask the manufacturer of motor! | 01/01/70 00:00 | |
| Most of the manufacturers are chinese :) | 01/01/70 00:00 | |
Link, if the manufacturer absconds... | 01/01/70 00:00 | |
| Driver protection | 01/01/70 00:00 | |
| I could, probably, figure it out, but ... | 01/01/70 00:00 | |
| Take one | 01/01/70 00:00 | |
| thx, I now know I did it once - long ago | 01/01/70 00:00 | |
| suppress RF emissions from resonances? | 01/01/70 00:00 | |
| Many reasons | 01/01/70 00:00 |