Instruction manual

5 2 Variable Period Full Wave SSR (VPFW SSR)5 2 Variable Period Full Wave SSR (VPFW SSR)
VPFW SSR is a variable period full wave solid-state relay. It can provide a zero
cross output with superior controllability compared to a conventional SSR with
VPFW SSR is a variable period full wave solid-state relay. It can provide a zero
cross
output with superior controllability compared to a conventional SSR with
+
AC
Input
AC
Input
AC
Output
AC
Output
Pulsed Voltage
Control Input
Pulsed Voltage
Control
Input
Unlike a conventional SSR, the VPFW SSR always give the output an even number of
half cycles ( full wave ) as shown in the following diagram.
Unlike a conventional SSR, the VPFW SSR always give the output an even number of
half
cycles ( full wave ) as shown in the following diagram.
Figure 5.2
Block Diagram of VPFW SSR
Figure 5.2
Block
Diagram of VPFW SSR
Power InputPower Input
Control InputControl Input
Power OutputPower Output
VPFW SSRVPFW SSR Conventional SSRConventional SSR
The VPFW switches the load without DC current, hence minimizing the
harmonic current and stress on the load. The load life is prolonged.
The VPFW switches the load without DC current, hence minimizing the
harmonic current and stress on the load. The load life is prolonged.
As the duty cycle (i.e. output power level) of the control input is small, the
off period will be extended to keep the output resolution so that the
conversion error is minimized. As low as 0.1% of timing error can be
achieved. Hence, VPFW SSR is particularly suitable for a smoother control.
As the duty cycle (i.e. output power level) of the control input is small, the
off period will be extended to keep the output resolution so that the
conversion error is minimized. As low as 0.1% of timing error can be
achieved. Hence, VPFW SSR is particularly suitable for a smoother control.
Figure 5.3 VPFW SSR
vs. Conventional SSR
Figure 5.3 VPFW SSR
vs.
Conventional SSR
NOTES:
1.The VPFW SSR can be used to drive
resistant load and some types of
inductance load such as relay,
contactor, magnetic switch, solenoid
valve etc. However, it
2. Only can supply VPFW
SSR, otherwise, it will not operate
properly.
can not drive
Motor and Capacitance Load.
AC power
1.The VPFW SSR can be used to drive
resistant
load and some types of
inductance
load such as relay,
contactor,
magnetic switch, solenoid
valve
etc. However, it
2.
Only can supply VPFW
SSR,
otherwise, it will not operate
properly.
can
not drive
Motor
and Capacitance Load.
AC
power
84