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73
REFERENCE 7
B
RAKING
R
ESISTOR
C
ALCULATIONS
Overvoltage Threshold Parameter
The Over Voltage Threshold parameter controls when the braking resistor is used. This parameter sets the
tripping point on the power bus voltage. During a deceleration period, if the input power voltage exceeds this
setpoint, the transistor on Ext. Brake Resistor pin turns on. (See page 24,
) The attached
braking resistor becomes another load on the power bus during this time. The braking resistor absorbs the
power that is generated during a deceleration period and prevents the power bus voltage from rising to the
point where it can damage attached equipment. The Over Voltage Threshold parameter has the following
ranges:
If set to 0, the braking resistor is not used. The power bus voltage is not monitored and the Ext. Brake
Resistor pin will never turn on.
If set within the range of 550 to 1000, the braking resistor is used when the power bus voltage exceeds
the set value. The value is programmed in steps of 0.1 V. The range of 550 to 1000 corresponds to a
voltage range of 55.0 to 100.0 V
Required Information
Motor rated (continuous) power
157 W
Initial speed at the start of deceleration in radians/sec.
Application specific. Maximum speed for the motor is 3000 RPM. (314.2 radians/sec)
Speed in RPM * 0.10472 = Speed in radians/sec.
Final speed at the end of deceleration in radians/sec.
Application specific. Typical final speed is 0.
Speed in RPM X 0.10472 = Speed in radians/sec.
Required deceleration time in seconds
Application specific.
Motor Inertia in kg·m
2
48x10
-6
kg·m
2
Load Inertia in k·gm
2
Application specific. Inertia in lb·ft
2
X 4.214 X 10
-2
= Inertia in kg·m
2
Gear Ratio (GR) between motor and load
GR = Load Speed / Motor Speed.
Programmed value for Overvoltage Threshold parameter
This parameter sets the voltage at which the braking resistor circuit is turned on. Range of values is 55.0
to 100.0 volts with a 0.1 volt resolution.
This reference introduces the calculations necessary to size an external braking
resistor for your specific application.
Summary of Contents for SV160E2
Page 1: ...MICRO CONTROLS INC ADVANCED U s e r M anual Manual 940 0S252 E2 Technology...
Page 10: ...ABOUT THIS MANUAL SV160E2 User Manual ADVANCED MICRO CONTROLS INC 10 Notes...
Page 40: ...MOVE PROFILE CALCULATIONS SV160E2 User Manual ADVANCED MICRO CONTROLS INC 40 Notes...
Page 56: ...CONFIGURATION MODE DATA FORMAT SV160E2 User Manual ADVANCED MICRO CONTROLS INC 56 Notes...
Page 88: ...INSTALLING THE SV160E2 SV160E2 User Manual ADVANCED MICRO CONTROLS INC 88 Notes...
Page 108: ...ETHERNET IP EXPLICIT MESSAGING SV160E2 User Manual ADVANCED MICRO CONTROLS INC 108 Notes...
Page 112: ...MODBUS TCP CONFIGURATION SV160E2 User Manual ADVANCED MICRO CONTROLS INC 112 Notes...
Page 120: ...LEADERS IN ADVANCED CONTROL PRODUCTS ADVANCED MICRO CONTROLS INC...