romanru1.. ты уж извини за сарказм.
romanru1 писал(а):
А какую модель ?
Смотри название темы . 7I29
romanru1 писал(а):может все таки резистор
Всё-таки не может.
Вот тебе из мануала 7i29 .
MOTOR POWER
Motor power is supplied to the 7I29 on pins 1 and 2
of TB2. Motor power can range
from 0 to 165V VDC with an absolute maximum value o
f 180V. Since gate power is not
derived from motor power, operation from low motor
voltages will not harm the 7I29.
ЧИТАТЬ ОТСЮДА.
The 7I29 does not have any braking or load dump capabil
ity, so if the 7I29 is operated near the
maximum power supply voltage, either sufficient ext
ernal capacitance or and external
voltage sensing brake circuit may be required to pr
event excessive voltage surges on the
motor power supply when decelerating large motors.
In addition, there must always be
enough output filter capacitance to absorb the indu
ctive energy stored in the motor
windings without increasing the motor supply voltag
e above the 7I29s maximum limit
.
For example at a motor armature inductance of 15 mH
and 22.5A maximum current,
maximum inductive stored energy is ½ LI^2 or about
3.8 Joules per motor. This requires
an output capacitor in the 5000 uF range for 2 moto
rs when the 7I29 is operated at a
nominal 165V (roughly rectified 120V line voltage).