OMRON provides single-phase/three-phase
Power Controllers with a phase control system and Multi-channel Power
Controller that enable high-precision temperature control with optimum
cycle control.
Heater Control Types
G3PW Control Methods
Analog Control
The change in current output of the Temperature Controller between 4 and
20 mA is used for precise heater control by the G3PX,which outputs
smoothly adjusted power. Fine adjustments of the heater temperature are
possible with external or internal duty setting.
ON/OFF Control
The voltage output of the Temperature Controller is used for ON/OFF heater
control. Fine adjustments of the heater temperature are possible with
external or internal duty setting.
Two-position Control
The high level and low level of the output are freely set with an external
variable resistor, either of which is selectable with the relay output of
the Temperature Controller.
Manual Control
Output adjustments are possible with an external variable resistor.
ON/OFF Control
Cycle Control
Optimum Cycle Control (High-accuracy zero-cross control)
Note: Optimum cycle control can be
achieved with the G3PW as well.
Phase Control (Single-phase Model)
Connection Examples of G3PW and
Temperature Controller
-
The soft-start time is adjusted between 0 and
99.9 s, thus enabling the heaters to withstand long use.
-
If a single Temperature Controller is in
control of more than one heater, by making a proper duty setting, the
difference in temperature between the heaters can be improved.
Note: The temperature at point B can be
higher than that at point A due to thermal interference. In that case,
make the duty set value for heater B smaller than that for heater A so
that there will be no difference in temperature between points A and B.
Power Controller Glossary
Phase Control
Duty Setting
As shown in the following graphs, the change of output can be adjusted
with an internal or external variable resistor.
In the case of an electric oven, overshooting may result by using a heater
with a capacity that is excessively high for the size of the oven.
By adjusting the duty-setting variable resistor, the overshooting can be
suppressed.
For example, if a duty of 60% is set for a 5-kW heater, a maximum of 3 kW
will be input into the heater. Thus, it operates as a 3-kW heater.
Duty Setting All G3PW Models
Soft-start
This function suppresses the inrush current that is caused when the load
is turned ON, thus ensuring smooth starting of the load.
This function is especially effective for loads that involve high inrush
current, such as halogen lamps.
Base-up
This function briefly keeps the output of the G3PX turned ON after heating
when the input signal is OFF.
This is effective for a smooth start of equipment that is slow in initial
heating operation.
Constant Current
The constant current function automatically suppresses the inrush current
when it is too large to be sufficiently suppressed by the soft start
function, thus protecting the heater and system from damage.
Recommended Products
|
Power Controller
G3PW
High-precision control with easy
setup. |
|
Multi-channel Power
Controller
G3ZA
Optimum cycle control for
high-precision control with low noise. |
| 
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