24
Operation
Dynamic braking may be used to rapidly stop a motor, Figure 12
(page 25). For the RUN/BRAKE switch, use a three pole, two
position switch rated for at least 125 VDC, 6 Amps. The dynamic
braking resistor should be ceramic encased, and a minimum of 25
ohms, 10 watts. The motor stops less rapidly with higher brake
resistor values.
Certain Minarik drives coast to minimum speed when the inhibit
terminals are shorted to each other. IR COMP and TORQUE are
still active while the drive is in the inhibit mode.
NOTE: Model MM21251C is equipped with dynamic braking.
Dynamic braking
Warning
For frequent starts and stops, use coasting to a stop (shorting
inhibit terminal to each other – MM21051C only),
decelerating to minimum speed (shorting S2 and S1 to each
other), or dynamic braking. Do not use any of these methods
for emergency stopping. They may not stop a drive that is
malfunctioning. Removing AC line power (both L1 and L2) is
the only acceptable method for emergency stopping.
Wait for the motor to completely stop before switching back to
RUN. This will prevent high armature currents from damaging
the motor or drive.
Содержание MM21051C
Страница 9: ...3 Figure 2 MM21151C Dimensions ALL DIMENSIONS IN INCHES MM Dimensions...
Страница 10: ...4 Dimensions Figure 3 MM21251C Dimensions ALL DIMENSIONS IN INCHES MM...
Страница 11: ...5 Figure 4 MM21151C and MM21251C Back View Cased Mounting Keyhole Locations...
Страница 31: ...25 Figure 12 Dynamic Braking Circuit Connection Operation...
Страница 33: ...27 Calibration Figure 13 Calibration Trimpot Layouts MM21051C MM21151C MM21251C...
Страница 37: ...31 Figure 14 Typical TORQUE and IR COMP Settings actual settings may vary with each application Calibration...
Страница 50: ...44 Figure 23 MM21051C MM21151C and MM21251C block diagram Block Diagrams...
Страница 51: ...45 Figure 24 MM21151C switching circuit connections...
Страница 52: ...46 Block Diagrams Figure 25 MM21251C switching circuit connections...
Страница 54: ...48 Notes...