Junus0 pages

Junus
DIGITAL SERVOAMPLIFIER
for DC BRUSH MOTORS
JSP
RoHS
Control Modes
• Velocity, Torque
Command Interface
• ±10V velocity/torque command
• PWM velocity/torque command
Communications
• RS232
Feedback
• Back-EMF (velocity mode)
I/O - Digital
• 5 inputs, 1 output
Dimensions: mm [in]
• 130 x 82 x 31 [5.1 x 3.2 x 1.2]
MODEL
Ic
Ip
Vdc
JSP-090-10
5
10
90
JSP-090-20
10
20
90
JSP-180-10
5
10
180
JSP-180-20
10
20
180
JSP-180-30
15
30
180
DESCRIPTION
The Junus™ digital servoamplifier puts 100% digital control of DC
brush motors in a panel-mounting package with power options to
±15 Adc continuous and ±30 Adc peak from +20 Vdc to +180 Vdc
DC power supplies.
Torque mode operation works with popular position-loop controllers
that use PID filters to close a position-loop. Sensorless velocity
control works with position loop controllers that only output a
position-error signal such as PLC’s.
Set-up is fast and automated by CME 2™ software operating under
Windows®.
CME 2™ communicates with Junus™ through an RS-232 link for
complete amplifier setup. Auto-tuning algorithms in CME 2™
slash set up times for fast system commissioning by automating
current and velocity-loop tuning. A powerful oscilloscope and
signal generator display amplifier performance for fine tuning
thereafter.
Amplifier control parameters are saved in non-volatile flash memory.
OEM’s can inventory one part, and configure amplifiers on-site to
each axis in a machine.
Current-loop sampling at 20 kHz yields high-bandwidth with full
adjustability. The velocity loop is sampled at 4 kHz for wide velocity
bandwidths.
Carrier-cancellation modulation all but eliminates motor ripple
current and dissipation at a standstill, and provides excellent
crossover characteristics for voice-coil applications that demand low
distortion around zero. PWM ripple is at 40 kHz, further minimizing
losses in low-inductance motors.
Sensorless velocity control regulates motor back-EMF and
compensates for changes in load that would cause a speed change
with simple voltage controls. Amplifier output voltage is increased to
offset the internal I*R voltage drops, keeping back-emf constant.
All amplifier circuits are DC coupled and operate from unregulated
transformer-isolated DC power supplies, or regulated switching
power supplies.
The panel-mount package is compatible with the mounting footprint
of Copley’s 4xx series analog DC brush-motor amplifiers, offering
an easy upgrade to 100% digital control.
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
Tel: 781-828-8090
Tech Support: E-mail: sales@copleycontrols.com, Internet: http://www.copleycontrols.com
Fax: 781-828-6547
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