Mitsubishi Electric FR-A700 Series, Техническое руководство, Страница: 513 / 550

547
SELECTION
S
E
LECTION
3
(2) Brake unit-generated heat
When a brake unit is used, heat is generated by the
brake unit and the brake resistor.
1) Heat generated by the brake unit (excluding that
of the brake resistor) is found according to the
diagram as shown below.
2) Heat loss of the brake resistor is calculated by the
following expression:
P[W] =
J N
2
S
13700
J : Overall reflected to motor shaftJ
T
(including
motorJ
M
) [kg m
2
]
N : Motor speed [r/min]
S : Number of deceleration [times/min]
120
100
80
60
40
20
0 20 40 60 80 100
BU-H30
K
BU-H15
K
BU-H7.
5K
BU-15K
BU-7.5K
BU-370
0
BU-1500
Heat generated(W)
Brake unit duty (%ED)
a) BU type
600
500
400
300
200
100
5
0 20 40 60 80 100
FR-BU-55K
FR-BU-H55K
FR-BU-30K
FR-BU-H30K
FR-BU-15K
FR-BU-H15K
Brake unit duty (%ED)
b) FR-BU type
FR-BU2-30K
FR-BU2-15K
FR-BU2-7.5K
FR-BU2-3.7K
FR-BU2-1.5K
0
50
100
150
200
250
300
0 10 20 30 40 50 60 70 80 90 100
Heat generated(W)
Brake unit duty (%ED)
200V class
0
100
200
300
400
500
600
700
0 10 20 30 40 50 60 70 80 90 100
FR
-B
U2
-55K
Heat generated(W)
Brake unit duty (%ED)
0
50
100
150
200
250
300
350
0
10 20 30 40 50 60 70 80 90 100
FR
-BU
2-H
75K
FR
-BU2
-H5
5K
FR-BU
2-H30K
FR-BU
2-H15K
FR-BU2-H
7.5K
Brake unit duty (%ED)
Heat generated(W)
c) FR-BU2 type
Brake unit-generated heat
400V class