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The user can configure:
-
Amplitude: desired output voltage value.
-
Sign: the output voltage between channels U,V,W is always positive with respect to N.
No negative voltages can be set.
-
Setpoint limitation: the maximum current may be controlled in this operation mode.
The maximum available voltage will affect to the limit of the voltage setpoint given,
but it will not be controlled. Therefore, in those applications where the load imposes a
higher voltage than the maximum available, the power supply will trigger an
overvoltage alarm.
4.3.3.
Power mode
The power mode is implemented with a current PID. In this case, taking into account that the
power equals to V·I, a linear controller may not be the optimum option to close this control
loop. Consequently, in order to take advantage of the PID controller benefits, a linearization is
made by dividing the power command by the output voltage of the power supply.
PID
PWM
Converter
Voltage feedback
Power
consig
÷
Current feedback
As in current mode case, the user can configure:
-
Amplitude: desired output power value.
-
Sign: a positive sign represents a current sourced from the power supply. A negative
sign represents a current sunk by the power supply.
