20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
SMD34K User Manual
SMD34K S
PECIFICATIONS
23
Power Supply Sizing (continued)
Table R1.6 below shows the suggested power supply sizes based on the maximum power the motor can gen-
erate over its entire speed range.
Table R1.6 Suggested Power Supply Ratings
Regeneration (Back EMF) Effects
All motors generate electrical energy when the mechanical speed of the rotor is greater than the speed of the
rotating magnetic fields set by the drive. This is known as regeneration, or back EMF. Designers of systems
with a large mass moment of inertia or high deceleration rates must take regeneration effects into account
when selecting power supply components.
The first line of defense against regenerative events is an appropriately sized power supply. The additional
capacitance typically found in a larger supplies can be used to absorb the regenerative energy. If your applica-
tion has high deceleration rates, then a supply that can deliver 175% of peak motor power should be used.
The second line of defense is a regeneration resistor, also known as a braking resistor. Braking resistors, and
their control circuitry, are built into AMCI AC powered drives. They are not included in the SMD products
because of the limited ability to dissipate the heat generated by the resistor. An external braking resistor and
control circuitry can be added to the system. The power switches in the SMD34K units can conduct a maxi-
mum of 8 amps, so the sum of the motor current and braking resistor circuit currents must be below this value.
Regeneration events can raise the Vdc supply voltage to an unexpected value. Compo-
nents not rated for this voltage may be damaged.
Consider using a separate supply for any sensor attached to the SMD34K to protect it from regeneration
voltages.
Only use power supplies that will not be damaged by regeneration events.
Use a braking resistor if necessary.
SMD34K-450
SMD34K-850
SMD34K-1100
Motor
Power
150%
Supply
175%
Supply
Motor
Power
150%
Supply
175%
Supply
Motor
Power
150%
Supply
175%
Supply
Supply
Vo
lt
a
g
e
24 Vdc
90W
135 W
160W
100 W
150 W
175 W
100 W
150 W
175 W
48 Vdc
185 W
275 W
325 W
220 W
330 W
385 W
220 W
330 W
385 W
75 Vdc
290 W
435 W
510 W
335 W
500 W
600 W
315 W
472 W
552 W
Содержание SMD34K
Страница 1: ...MICRO CONTROLS INC ADVANCED U s e r M anual Manual 940 0S280 ...
Страница 6: ...TABLE OF CONTENTS SMD34K User Manual ADVANCED MICRO CONTROLS INC 6 Notes ...
Страница 50: ...CALCULATING MOVE PROFILES SMD34K User Manual ADVANCED MICRO CONTROLS INC 50 Notes ...
Страница 62: ...CONFIGURATION DATA FORMAT SMD34K User Manual ADVANCED MICRO CONTROLS INC 62 Notes ...
Страница 80: ...COMMAND DATA FORMAT SMD34K User Manual ADVANCED MICRO CONTROLS INC 80 Notes ...
Страница 100: ...LEADERS IN ADVANCED CONTROL PRODUCTS ADVANCED MICRO CONTROLS INC ...