Automatic Motor Adaptation (Ama); Automation Energy Optimization (Aeo); Braking Of Load; Braking Of Load Overview - Danfoss iC2 Application Manual

Application Guide | iC2-Micro Frequency Converters

Automatic Motor Adaptation (AMA)

2.4.6
Automatic Motor Adaptation (AMA) provides optimization of motor parameters for improved shaft performance. Based on motor
nameplate data and measurements of the motor at standstill, key motor parameters are being recalculated and used to fine tune the
motor control algorithm.

Automation Energy Optimization (AEO)

2.4.7
The Automatic Energy Optimizer (AEO) feature optimizes the control with focus on lowering energy consumption at the actual load
point.

Braking of Load

2.5

Braking of Load Overview

2.5.1
When braking the motor controlled by the drive, various functions can be used. The specific function is selected based on the application
and the needs for how fast it should be stopped.

Resistor Braking

2.5.2
In applications where fast or continuous braking is required, a drive fit with a brake chopper is typically used. Excess energy generated
by the motor during braking of the application will be dissipated in a connected brake resistor. Braking performance depends on the
specific drive rating and selected brake resistor.

Overvoltage Control (OVC)

2.5.3
If braking time is not critical or the load is varying, the overvoltage control (OVC) feature is used to control stopping the application. The
drive extends the ramp-down time when it is not possible to brake within the defined ramp-down period. The feature should not be
used in hoisting applications, high inertia systems, or where continuous braking is required.

DC Brake

2.5.4
When braking at low speed, the braking of the motor can be improved by using the DC brake feature. It adds a small DC current on top
of the AC current, slightly increasing the brake capability.

AC Brake

2.5.5
In applications with non-cyclic operation of the motor, AC braking can be used to shorten the braking time and is only supported for
induction motors. Excess energy is dissipated by increasing losses in the motor during braking.

DC Hold

2.5.6
DC hold provides a limited holding torque on the rotor at standstill.

Load Sharing

2.5.7
In some applications, 2 or more drives are controlling the application at the same time. If 1 of the drives is braking a motor, the excess
energy can be fed to the DC link of a drive driving a motor, with a reduction of the total energy consumption. This feature is useful in, for
examples, decanters and carding machines, where smaller power-sized drives operate in generator mode.

Protection Features

2.6

Grid Protections

2.6.1
The drive protects against conditions on the power grid that can affect proper operation.
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