Rockwell Automation 1336_F_E_T_S SERIES A CHOPPER BRAKE MODULE - Manual (Page 2)

Heavy Duty Dynamic Braking 2
1336-5.65 — March, 2007
What This Option Provides The brake chopper module is an open style assembly that together with
customer supplied braking resistors can increase the braking torque
capability of a 1336, 1336VT, 1336PLUS, 1336PLUSII, 1336FORCE or
1336IMPACT drive from approximately 10 to 100%.
Where This Option is Used B003-B250 and C003-C250 1336 Drives.
B003-B250 1336VT Drives.
AQF05-A125, BRF05-B600 and CWF10-C600 1336PLUS and
1336PLUSII Drives.
A001-A125, B001-B600 and C001-C650 1336FORCE and 1336IMPACT
Drives.
What These Instructions
Contain These instructions contain the necessary information to select, configure
and install dynamic braking. By completing Selecting a Chopper Module
and the Maximum Dynamic Brake Resistance first you will be able to
determine:
1. Whether or not dynamic braking is required for your application.
2. If dynamic braking is required, the rating and quantity of chopper
modules required as well as the size and type of braking resistors
required.
How Dynamic Braking Works When an induction motor’s rotor is turning slower than the synchronous
speed set by the drive’s output power, the motor is transforming electrical
energy obtained from the drive into mechanical energy available at the drive
shaft of the motor. This process is referred to as motoring. When the rotor
is turning faster than the synchronous speed set by the drive’s output power,
the motor is transforming mechanical energy available at the drive shaft of
the motor into electrical energy that can be transferred back into the utility
grid. This process is referred to as regeneration.
Most AC PWM drives convert AC power from the fixed frequency utility
grid into DC power by means of a diode rectifier bridge or controlled SCR
bridge before it is inverted into variable frequency AC power. Diode and
SCR bridges are cost effective, but can only handle power in the motoring
direction. Therefore, if the motor is regenerating, the bridge cannot conduct
B 009
Voltage Rating Continuous Amp Rating
A = 230VAC 018 = 375VDC, 18.0ADC
070 = 375VDC, 70.0ADC
115 = 375VDC, 115.0ADC
B = 380/415/460VAC 009 = 750VDC, 9.0ADC
035 = 750VDC, 35.0ADC
110 = 750VDC, 110.0ADC
C = 575VAC 009 = 935VDC, 9.0ADC
035 = 935VDC, 35.0ADC
085 = 935VDC, 85.0ADC
1336 — W
1336
1336VT
1336PLUS
1336PLUS II
1336FORCE
Brake Chopper Module