Applied-motion STR2 Manual de usuario descargar pdf (Pagina 30)

STR2 Hardware Manual

920-0059B

1/30/2014

Motor Heating

Step motors convert electrical power from the driver into mechanical power to move a load.

Because step motors are not perfectly ecient, some of the electrical power turns into heat on

its way through the motor. is heating is not so much dependent on the load being driven but

rather the motor speed and power supply voltage. ere are certain combinations of speed

and voltage at which a motor cannot be continuously operated without damage.

We have characterized the recommended motors in our lab and provided a table and sev-

eral curves showing the maximum duty cycle versus speed for each motor at commonly used

power supply voltages. Please refer to this information when planning your application.

Please also keep in mind that a step motor typically reaches maximum temperature aer 30 to

45 minutes of operation. If you run the motor for one minute then let it sit idle for one minute,

that is a 50% duty cycle. Five minutes on and ve minutes o is also 50% duty. However, one

hour on and one hour o has the eect of 100% duty because during the rst hour the motor

will reach full (and possibly excessive) temperature.

100

120

140

160

180

200

oz-in

12 VDC 24 VDC 48 VDC

Connection:series

Drive settin

s: 2.2A/

hase, 20000 ste

s/re

HT23‐601,STR2

0 10 20 30 40 50

rps

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36 37 38

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Applied-motion STR2 Manual de usuario Pagina 30