ABB i-bus KNX - Pulse Width Modulation - Calculation

ABB i-bus
®
KNX
Planning and application
FCA/S 1.x.x.1 | 2CDC508134D0202 251
4.3.3.3 Pulse width modulation – calculation
With pulse width modulation, control is implemented by a variable mark-space ratio.
During the time t
ON
the valve is opened and during the time t
OFF
it is closed.
On account of t
ON
= 0.4 x t
CYC
the valve is set to about 40 % on. t
CYC
is the so-called PWM cycle time for
continuous control.