Applied-motion STR4 Manual do Utilizador descarregar pdf (Página 42)

STR4/8 Hardware Manual

920-0030J

5/12/2015

Drive Heating

While STR drivers eciently transmit power between the power supply and motor, they do

generate some heat in the process. is will cause the temperature of the drive to rise above

the surrounding air temperature and may also require that the drive be mounted to a heat

conducting metal surface.

For those who wish to calculate the power dissipation and temperature rise, the following infor-

mation is provided:

1. drive power dissipation P

versus motor current and power supply voltage (see chart)

2. drive thermal constant R

e nal drive case temperature is given by

= T

+ R

* P

where T

is the ambient temperature of the surrounding air. e case of the drive should not

be allowed to exceed 70°C or the life of the product could be reduced.

Drive thermal constant:

Narrow side of drive mounted on a 13.5” x 13.5” steel plate, .070” thick: R

=1.0°C/W

Narrow side of drive mounted on a non-heat conducting surface: R

=2.1°C/W

Loss(W)

STRDriveLosses

60V

48V

24V

12345678

Driver

motorcurrent(A)

1 2 ... 37 38 39 40 41 42 43 44 45 46

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Applied-motion STR4 Manual do Utilizador Página 42