PD-1060 / TMCM-1060 V1.0 Hardware Manual (Rev. 1.08 / 2013-JUL-04)
10
6.1 Power Connector
This module offers separate power supply inputs for digital logic (pin 2) and driver/power stage (pin 1). Both
supply inputs use common ground connections (pin 4). This way, power supply for the driver stage may be
switched off while still maintaining position and status information when keeping digital logic supply
active.
+UDRIVER SUPPLY ONLY
In case only power supply is provided to the power section (pin 1), an internal diode will distribute power
to the logic section. So, when separate power supplies are not required, use pin 1 and 4 for powering the
module. If so, pin 2 (logic supply) and pin 3 (/SHUTDOWN input) can be connected together in order to
enable the driver stage.
ENABLING THE DRIVER STAGE
Connect /SHUTDOWN input to +UDriver or +ULogic in order to activate the driver stage. Leaving this input open or
connecting it to ground will disable driver stage
To ensure reliable operation of the unit, the power supply has to have a sufficient output capacitor and the
supply cables should have a low resistance, so that the chopper operation does not lead to an increased
power supply ripple directly at the unit. Power supply ripple due to the chopper operation should be kept at
a maximum of a few 100mV.
GUIDELINES FOR POWER SUPPLY
-
-
-
keep power supply cables as short as possible
use large diameters for power supply cables
add 2200µF or larger filter capacitors near the motor driver unit especially if the distance to the
power supply is large (i.e. more than 2-3m)
CAUTION!
Add external power supply capacitors!
The module contains ceramic capacitors for power supply filtering. These have been
selected for high reliability and long life time. Nevertheless, the resulting capacity is rather
low. This may lead to excessive supply voltage ripple depending on motor current. Also,
extremely low ESR values of ceramic capacitors can lead to stability problems with some
power supplies. In order to avoid this, an external (electrolytic) capacitor of sufficient size
(2200µF or more recommended) should be added. Rule of thumb: add 1000µF per 1A power
supply current not far away from the module between power supply wires. Please note:
upper supply voltage limit must not be exceeded – not even for a short period of time! In
this context it should be taken into account that the module will transfer energy from the
motor back into the supply rail when the motor is working as generator e.g. during
deceleration or brake conditions. In case the power supply capacitors are not sufficient for
limiting power supply rising, additional measures have to be considered (e.g. suppressor
diodes, brake resistor).
In larger systems a zener diode circuitry might be required in order to limit the maximum
voltage when the motor is operated at high velocities.
Do not connect or disconnect motor during operation!
Motor cable and motor inductivity might lead to voltage spikes when the motor is
disconnected / connected while energized. These voltage spikes might exceed voltage limits
of the driver MOSFETs and might permanently damage them. Therefore, always disconnect
power supply before connecting / disconnecting the motor.
Keep the power supply voltage below the upper limit of 51V!
Otherwise the driver electronics will seriously be damaged! Especially, when the selected
operating voltage is near the upper limit a regulated power supply is highly recommended.
Please see also chapter 8, operating values.
Pre-series boards are limited to +40V max. power supply.
www.trinamic.com
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
