| 摘要 |
<p>A pulse width modulated method, of controlling the supply of electrical power to an inductive load, using at least one power switch having <<on>> and <<off>> states for providing, respectively, low and high impedance paths between the inductive load and a source of power, thereby controlling the current flow through the inductive load during a sequence of regular reoccuring time periods, and wherein the at least one power switch is switched, if in the <<off>> state, to the <<on>> state substantially at the beginning of at least some of the time periods, the method of comprising the combination of steps, operative during any one of a plurality of the time periods, of:
switching the at least one power switch from the <<on>> state to the <<off>> state when a predetermined level of current flow has been reached flowing in one of, the inductive load and the at least one power switch; and
switching the at least one power switch back to the <<on>> state after the <<off>> state, independent of the occurrence of the beginning of a time period.</p> |
