User Manual EA4709 / EA4718
ElectroCraft
®
E-Mail: [email protected] www.electrocraft.com May 2009
9
3.3 Control
Elements
3.4 Operation
Modes
PWM Mode
In the PWM mode the input voltage of the set value is directly converted to a PWM-signal at
the output. The drive works in open loop and the complete regulation circuit is switched off.
In this mode the drive is used e.g. as a power amplifier for a positioning system.
Hall Mode
At hall mode the feedback information is coming from hall switches which are mounted in
the motor or a hall encoder which is mounted at the motor. The speed regulation is good at
each load condition and qualified for each application to control the speed of a system also
for high speed application.
Encoder Mode
At encoder mode feedback information is coming from the encoder signals. The encoder is
mounted at the motor. The speed regulation has got a high performance at each load
condition and qualified for each application to control exactly the speed of a system
especially for low speed application. The maximum achievable speed in this mode is limited
through the encoder input frequency.
Torque Mode
At torque mode the drive does only control the current of the motor. This control loop is very
fast but the speed is moving with the load due to the constant current. This mode is used in
application with force control or as a fast power amplifier for positioning systems.
