Dynamic control of an electric drive

A method of operating an airless paint sprayer having an electric drive with an inductive drive coil, the method comprising:

• setting a target pulse on-time threshold;
• providing current pulses to the inductive drive coil during a series of pulse cycles, each current pulse having a pulse on-time in which current is applied to the inductive drive coil;
• for a non-first pulse cycle in the series of pulses cycles,
• sensing a current pulse in the inductive drive coil during the non-first pulse cycle;
• determining that the current pulse applied during the non-first pulse cycle satisfies a threshold condition;
• based on the determination, instantaneously terminating the current pulse by removing current from the inductive drive coil during the non-first pulse cycle;
• setting a target pulse on-time threshold for one or more subsequent pulse cycles, subsequent to the non-first pulse cycle;
• and
• terminating a current pulse during the one or more subsequent pulse cycles based on the target pulse on-time threshold.

A fluid sprayer comprising:

• a fluid pump;
• an electric drive operably coupled to the fluid pump, the electric drive having a coil that when energized causes the electric drive to drive the pump to pressurize, fluid;
• a spray nozzle configured to emit the pressurized fluid in a spray pattern;
• a coil drive component configured to apply current pulses to the coil during a series of pulse cycles at a particular frequency, each current pulse being applied during a pulse on-time of a corresponding pulse cycle having a first duty cycle;
• coil current sensing circuitry configured to provide an indication of current flowing in the coil;
• and
• a controller configured to receive the indication of current flowing in the coil and adjust a duty cycle of at least one subsequent pulse cycle based on the indication of current flowing in the coil, wherein the at least one subsequent pulse cycle is subsequent to the series of pulse cycles and is applied to the coil at the same particular frequency, wherein the controller is configured to instantaneously terminate the current pulse applied to the coil based on the indication of current flowing in the coil.