JVL MIS17 Series, User Manual

Page: 12 / 367

12 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS17x, 23x, 34x, 43x
2.1 Power Supply
2.1.1 General Aspects of Power Supply
Powering of the motor is relatively simple. The supply input of the MIS motor family is
equal for all family members.The supply consist of 2 inputs:
CVI The control voltage input is supplying all the internal control circuits including the
microprocessor, encoder and user I/O circuitry. The voltage needed must be in
the range 7-28 VDC which also support battery driven applications. Supply cur-
rent is below 200 mA (voltage dependant and no user outputs activated).
P+ The main power for driving the motor is supplied on this terminal and must be in
the range 7-72 VDC. The voltage at this terminal will also influence torque at
higher velocities. A voltage of 72 VDC will give much higher torque than using for
example 24 VDC. The supply current can get as high as 6 ARMS.
See also Torque Curves , page 324 which shows the relation between supply volt-
age and the torque.
If the motor needs to be stopped it can be done by removing P+ but keeping CVI con-
nected. This will keep the complete motor alive including I/O’s and encoder circuit (if
present) except that the motor driver and motor is power less and will not rotate.
Supplying both terminals from the same power supply can be done, but then 28VDC is
the absolute maximum voltage allowed (=maximum limit of CVI).
NB: for actual connections, see drawing How to connect a MIS motor , page 37
2.1.2 Supplying only the control core
The main supply at the terminal P+ can be removed while keeping CVI
supplied. This will keep all internal functions alive including all communi-
cation channels such as Ethernet (Option), position counters etc.
When P+ later is re-applied the motor is fully operational and can con-
tinue the movement and operation it was doing just before the P+ supply
was removed.
Important: CVI and P+ are not in any way connected together internally. There is no
diode or resistor from CVI to P+ or from P+ to CVI. With 24VDC present at CVI and
P+ disconnected, due to a minor leakage current, the voltage at the P+ will increase to
typical 0.95V. This voltage increase at P+ is far from enough to make the motor able to
turn - but if you need full safety please use the optional STO function which is available
for all MIS and MIL motors. See also STO - Safe Torque Off, page 58.
Main Power Supply
7-72VDC
MISxxx Motor
Control Voltage
7-28 VDC (typ. 24VDC)
+
+
MISxxx Power Supply
TT2506-02GB
P-
(GND)
CVI
(Control Voltage Input)
P+
(Main supply)
NB: Remember to connect CVI
!