| 摘要 |
Dimming system with parallel dimmers each with user interface and dimmer circuit are connected in series with a load and AC source. AC switch in dimmer circuit switches AC to the load at a conduction angle, the AC conducted in ON state and not OFF state; a controller determines the conduction angle to control turn-ON at each half cycle to control switching of ON and OFF states based on user control signal; controller detects zero-crossing of the AC and track conduction angle by detecting change in conduction angle based on zero-crossing of the AC. If the controller of an initiating dimmer determines a new conduction angle based on user signal this controller uses the new conduction angle. The controller of each dimmer except the initiating one detects a change in the conduction angle of the load in response to the new angle and the controller of each dimmer except the initiating one adopts that angle. |
