ElmoMC SimplIQ Analog Servo Amplifiers-Violin Installation - Manual (Page 16)

Violin Installation Guide Installation
MAN-VIOIG (Ver. 2.3)
3-7
3.6.2 Connecting a Non-isolated Violin to an Isolating
Power Transformer
Be sure to ground:
DC power common
Motor chassis
Amplifier heatsink
Do not ground the control common, which is internally connected to the power common.
Grounding the control common will create a ground loop.
3.7 DC Power Supply
The DC power supply can be at any voltage in the range defined in the technical
specifications (
Appendix of this guide). The supply source must comply with the safety
aspects of the relevant requirements, in accordance with the most recent version of the
standard EN60950 or equivalent Low Voltage Directive Standard, all according to the
applicable over-voltage category. If the power source to the power supply is the AC line
(through a transformer), safety margins must be considered, in order to avoid activating
the under/over voltage protection due to line variations and/or voltage drop under load.
In addition to the above, the transformer must comply with the safety aspects of the
relevant requirements in accordance with the most recent version of the standard
EN60742 (Isolating and Safety Isolating Transformers). The nominal DC bus voltage
should be in the following range:
1.2 V
dcmin
< Vdc < 0.9
Vdcmax
where:
V
dcmin
is the minimum DC bus
Vdcmax
is the maximum DC bus
The recommended minimum power supply capacitance for single-phase connections is
as follows:
Amplifier Voltage Range 50 - 55 V 100 V 200 V
Recommended capacitance 5600 µF 3300 µF 1500 µF
The transformer power should be calculated such that it will be able to deliver power to
the amplifier (including peak power) without significant voltage drops.
The power supply should be located as close as possible to the amplifier. The maximum
distance is 30 cm (1 foot). While driving high-inertia loads, the power supply must be
equipped with a shunt regulator; otherwise, the amplifier will be disabled whenever the
capacitors are charged above the maximum voltage.