12 Appendix
12.1 Glossary
A
Acceleration The rate of increase of velocity with respect to time
Alarms Irregular operating situations highlighted by LED or display message, with
subsequent analysis through the Dx2020 GUI
Asynchronous Motor Motor in which the rotor and the magnetic field turn at different speeds.
B
Base control board Section of the main control circuit with interface to other internal or external
functions and slots for optional modules.
Brushless motor Class of motors that operate using electronic commutation of phase currents
rather than electromechanical (brush-type) commutation. Brushless motors
typically have a permanent magnet rotor and a wound stator.
C
CANopen CANopen is a communication protocol used in automation systems. The
communication profiles and the basic specifications of the CANopen devices
are provided by the CAN in Automation (CiA) draft standard CiA 301. The
motion control is specified in CiA 402.
Capacitance to
ground
The drives and the power supply have a capacitance to ground (the metal
case) composed mainly by the capacitors on the DC bus circuit. This provides
a low impedance connection for high frequency current dispersion.
DC bus Circuit composed of the rectified and flattened supply voltage.
Braking Circuit Circuit that converts the excess energy regenerated by the motor into heat
during the deceleration phase.
Circuit, short Typically unintended electrical conduction between two phases or conductors
with different polarity of an alternating or continuous voltage.
Clock Timing signal.
Controller A term describing a functional block containing an amplifier, power supplies
and possibly position-control electronics for operating a servomotor or step
motor.
Control loops Set of hardware and firmware circuits that determine the control of the
quantities relating to torque, speed and position on the basis of the values
measured by the relative sensors. They can be closed or open. Closed control
loops are based on sensors for the feedback signals: resolvers and encoders
for position and speed loop; Hall effect current sensors for the current loop. A
typical open control loop is related to the control voltage/frequency (V/f) of an
asynchronous motor without speed transducer.
Convection Free movement of air (not forced) for cooling.
D
DC bus -
Intermediate circuit
The power supply for the individual axis modules formed from the rectified
grid voltage and filtered by powerful capacitors.
Disable Removes the ENABLE signal.
Deceleration The rate of decrease of velocity with respect to time
Display Part of the front panel used for the visual signaling of information.
Directive (Machine) The Machinery Directive is a set of rules defined by the European Union,
PN: L-MAM2-E-201
Moog Casella DM2020 Installation and Startup Guide
13.1 Glossary
To Next Page
Loading...
Need help?
General
