Assuming the dimmer is compatible with the load type, the problem is caused by a combination of the brutal way that the switching is achieved in triacs.
More expensive phase-control dimmers have large inductors in series with the triac (or SCR), often in conjunction with a capacitor across the load. The following illustrations show the difference - although bear in mind these are very basic, to illustrate the point, and may not include all components required for a real design):
For a dimmer built into a unit intended to be fitted in place of a light switch, it's not really possible to calculate what you can get away with for the L-C filter (because that's what it really is), and the impact on the dimmer switch if the load goes open-circuit, because they are often potted and you can't see what components are used in the product.
Realistically, you might want to try:
Swapping out the dimmer, or trying another manufacturer's product
Assuming the dimmer is compatible with the load type, the problem is caused by a combination of the brutal way that the switching is achieved in triacs.
More expensive phase-control dimmers have large inductors in series with the triac (or SCR), often in conjunction with a capacitor across the load. The following illustrations show the difference - although bear in mind these are very basic, to illustrate the point, and may not include all components required for a real design):
For a dimmer built into a unit intended to be fitted in place of a light switch, it's not really possible to calculate what you can get away with for the L-C filter (because that's what it really is), and the impact on the dimmer switch if the load goes open-circuit, because they are often potted and you can't see what components are used in the product.
Realistically, you might want to try:
Swapping out the dimmer, or trying another manufacturer's product
