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BM series brake group
Rectifiers wiring diagram
BM series brake motors can be connect as diagram A or B according to the needed braking time. MGM motors are always provided with DC brake coil connected as diagram A. The DC brake coil has to be connected according to diagram B in order to have a quicker brake action. Here below brake intervention times and brake release time are provided.
White
White
+
Red
Grey or Brown
Black |
Brake coil j
White
White
Red
Grey or Brown
Black
Brake coil
Diagram A
Diagram B
The chart here below describes the trend of the braking torque as a function of time, during the start (on the left) and stop (on the right). The table below also show times for each type of motor and the values of Er (MJ) to calculate the number of braking actions between two consecutive air gap adjustment. (See page 33).
Î
Tb
Tb Brake Torque
Tbn Nominal Brake Torque
ti Switch-on time
t2i Delay Time
t22 Rise Time
t2 Reaction Time
I—
i
i
t *
t21
t22
CM
t2i quick (ms)
10 10
t22 quick (ms)
15 15
t2 quick (ms)
25 25
t2i standard (ms)
35 40
t22 standard (ms)
25 30
t2 standard (ms)
60
70
ErBM (MJ)
ti
(ms)
30 35
Frame size
56
7*
15
63
71
35
10
15
25
40
30
70
15
80
45
15
30
45
50
45
95
23
90
60
20
40
60
80
60
140
29
100
80
25
50
75
100
75
175
33
112
120
30
60
90
120
90
210
36
132
160
40
80
120
160
120
280
39
160
200
50
100
150
200
150
350
44
'Note: The air gap can't be restored on BM56 motors. The brake disc have to be replaced when the air gap exceed the stated value.
Braking Time
Jtot • n
t2
The braking time tf (s) can be calculated as follows: tf =
9.55 (Tb ±Tload)
1000
Where: Jtot total moment of Inertia at the motor shaft (Kgm2) n motor RPM (min-1) Tb brake torque (Nm)
Tioad resisting load torque (Nm) with + sign If matches the brake torque, or - sign If opposite t2 brake electrical reaction time (ms) This calculation gives an approximative indication. Please contact MGM staff for more information.
39
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Contents table 1 - 2
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page 2 p.2
page 3 p.3
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page 5 p.5
page 6 p.6
page 7 p.7
page 8 p.8
page 9 p.9
page 10 p.10
page 11 p.11
page 12 p.12
page 13 p.13
page 14 p.14
page 15 p.15
page 16 p.16
page 17 p.17
page 18 p.18
page 19 p.19
page 20 p.20
page 21 p.21
page 22 p.22
page 23 p.23
page 24 p.24
page 25 p.25
page 26 p.26
page 27 p.27
page 28 p.28
page 29 p.29
page 30 p.30
page 31 p.31
page 32 p.32
page 33 p.33
page 34 p.34
page 35 p.35
page 36 p.36
page 37 p.37
page 38 p.38
page 39 p.39
page 40 p.40
page 41 p.41
page 42 p.42
page 43 p.43
page 44 p.44
page 45 p.45
page 46 p.46
page 47 p.47
page 48 p.48
page 49 p.49
page 50 p.50
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