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Chapter 9 Peripheral Devices Selection
Noise filter
Install a noise filter to reduce the electromagnetic
noise generated from the inverter. Effective in the
rang from about 1MHz to 10MHz. When more
wires are passed throug, a more effective result
can be obtained.
Brake resistor and
brake unit
To improve the brake capability at deceleration.
Ferrite ring
To reduce the disturbance which is generated by
inverter.
9-2 Applied Braking resistor Specification
Applicable
Inverter Type
Brake resistor
Brake
Torque
(10% ED)
Motor
Output
(kW)
Remark
Power
( W)
Resistance
value Ω
S900-2S0.4GE
80
200
125
0.4
S900-2S0.75GE
100
200
125
0.75
S900-2S1.5GE
300
100
125
1.5
S900-2S2.2GE
300
70
125
2.2
S900-4T0.75GE
80
750
125
0.75
S900-4T1.5GE
300
400
125
1.5
S900-4T2.2GE
300
250
125
2.2
S900-4T3.7GE
400
150
125
3.7
Calculate of Braking resistor value:
The Braking resistor value is related to the DC currency when the
inverter braking. For 380V power supply, the braking DC voltage is
800V-820V, and for 220V system, the DC voltage is 400V.
Thereinto:
U
dc
——Braking DC voltage;
P
Motor
——Motor power;
M
br
——Braking torsion;
η
Motor
——Motor dfficiency;
η
Transducer
——Transducer efficiency.
Motor
Transducer
Motor