Adapting The Slope Limitation For Lowering The Eco Function; Optimising The Cos/Phi Controller - Lenze L-force HighLine C 8400 Series Reference Manual

8400 HighLine C | Reference manual
Motor control (MCTRL)
V/f characteristic control - energy-saving (VFCplusEco)
5.5.4.2

Adapting the slope limitation for lowering the Eco function

The ramp set in
that voltage is suddenly applied to the motor when the Eco function is deactivated.
Otherwise, the overvoltage limitation (Imax, Clamp) would be activated.
 This ramp is, depending on the device, pre-initialised to approx. the triple rotor time
constant. An adaptation of this parameter is not required.
When the Eco function is switched off, a quick reaction (high dynamic performance) is
required, but with a low current overshoot and a small torque jump. Thus, the Lenze
setting of C00982
reduction = 0).
 To increase the dynamics when switching off the Eco function:
Reduce  setting in C00982.
(Current compensation actions increase when the Eco function is switched off.)
 In order to reduce current compensation actions when switching off the Eco function:
Increase  setting in C00982.
(The dynamics when switching off the eco function is reduced)
5.5.4.3

Optimising the cos/phi controller

With the Lenze setting, the cosϕ controller is set such that usually no adaptation is required
for all power ratings and application cases.
Behaviour
The cosϕ actual value (C00979/1) varies greatly.
The cosϕ actual value (C00979/1) is permanently lower
than the cosϕ setpoint (C00979/2).
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C00982 for voltage reduction serves as slope limitation in order to prevent
is a compromise regarding the switch-off of the Eco function (voltage
L
Remedy/recommendation
Reduce gain Vp (C00975) and reset time Ti (C00976).
Increase gain Vp (C00975) and reset time Ti (C00976).
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011