Operation; Using The Mvs To Control A Motor; Using The Mvs To Control A Slip-Ring Motor - AuCom MVS0080 Product Manual

OPERATION: OPERATION
Chapter 9
9
9.1

Using the MVS to Control a Motor

9.2

Using the MVS to Control a Slip-Ring Motor

710-03261-00D

Operation

To soft start the motor, press the < START > button on the MVS Controller or
activate the Start remote input. The motor will start using the start mode selected
in parameter 2-A.
To soft stop the motor, press the < STOP > button on the MVS Controller or activate
the Stop remote input. The motor will stop using the stop mode selected in
parameter 2-H.
To emergency stop the motor using the soft starter, one of the programmable
inputs (parameters 4-C and 4-D) must be configured for emergency stop. When
the input is activated, the soft starter will remove power from the motor and open
the main contactor. The motor will coast to stop.
To reset a trip on the soft starter, press the < RESET > button on the MVS Controller
or open the Reset remote input.
The MVS can be used to control a slip-ring motor, using rotor resistance.
Main contactor
Sub-states
close time
100% voltage
Voltage at
conduction retard
Output voltage
States
Ready Pre-start tests
Start
command
In order to use the MVS with a slip-ring motor, set the following parameters:
•
parameter 9-A or 9-B Primary or Secondary Motor Ramp Configuration must
be set to dual ramp
•
an output relay (parameters 5-D to 5-J) must be set to rotor resistance. Wire
the relay to reduce the rotor resistance to provide suitable torque for the
application.
•
parameter 9-C Slip-Ring Rotor Resistance Contactor Time defines the time
between the rotor resistance contactor closing and the start of the low
resistance current ramp. Set a time which is:
•
long enough for the rotor resistance contactor to close
•
short enough for the motor to retain speed
•
parameter 9-D Slip-Ring Conduction Retard defines the level of conduction at
the start of the low resistance current ramp. Set a value which is:
•
low enough to avoid a current pulse
•
high enough for the motor to retain speed
Rotor resistance contactor
close time
Starting
High rotor resistance Low rotor resistance
current ramp retard
40
Bypass contactor
close time
current ramp retard
MVS Series
Running