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ABB i-bus KNX
4.3.4.3
Pulse width modulation
– calculation
© 2010 ABB STOTZ-KONTAKT GmbH
Planning and application
With pulse width modulation the control is implemented by a variable
mark-space ratio.
During the time t
the valve is opened and during the time t
ON
Due to t
= 0.4 x t
the valve is set to about 40 % on. t
ON
CYC
PWM cycle time for continuous control.
it is closed.
OFF
is the so-called
CYC
144
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