7.
Description of the EcoDrive Drive System
The EcoDrive Drive System is an electronically commutated, brushless DC motor.
The system is composed of the following subassemblies
Motor QE3760 / QE5540 (Fig.7.1) with integrated optoelectronic incremental encoder for commutation
and positioning.
Control (Fig.7.2) with
- mains connection with interference rejection circuit
- electronically controlled combinational circuit
- intermediate DC circuit
- motor-driven current inverter
- electronic control for motor control and machine specific functions
- connection for a sewing light
Speed control unit SWG2 (Fig.7.3)
Control panel S1 (Fig.7.4)
Mains switch located under the desktop table (Fig.7.5)
7.1 Motor QE3760/QE5540
The motor is a synchronous motor. It has a permanent-magnetic rotor, a stator with three-phase winding
and an optoelectronic increment encoder for commutation and positioning.
The rated capacity of the motor (shaft capacity) is 375W (QE3760), 550W (QE5540) in S5 mode.
The rated speed of the motor is 6000 rpm (QE3760), 4000 rpm (QE5540),
the maximum speed is 9000 rpm (QE3760), 4500 rpm (QE5540).
The motor has two mains leads:
a)
four-wire with special quadripolar AMP plug (X1 Fig.7.1) for connecting the stator coil to the control
system
b)
six-wire shielded with nine-pole D-sub plug (X2 Fig.7.2) for connecting the increment encoder to the
control system.
p-40-ed-2-en
7.1
04-03-08
A
B
C
Fig.7.3
Fig.7.1
Fig.7.5
Fig.7.2
Fig.7.4
X1
X2
3
3
3
3
3 3
3
3
3
3 3
3
3
3
3 3
3
3
3
3
