Carbon Brushes
Carbon brushes for industrial and traction motors
Application:
- stationary commutator machines
(direct and alternating current)
-
stationary ring machines
-
traction commutator machines
(direct and alternating current)
Carbon brushes for automotive industry
Application:
- starters
- alternators
- dynamos
- auxiliary motors
Carbon brushes for motors of electric hand tools
Application:
- drilling machines
- grinding machines
- saws
- others
Carbon brushes
for motors of elelctric household utensils
Application:
- food mixers
- kitchen robots
- hair-dryers
- safety-razors
- vacuum cleaners
-
washing-machines with commutator motors
others
Carbon brushes for small motors
in special instruments and machinery
Application:
- generators for frequency convertors
- small motors and generators in aeroplanes
- small motors for measuring, regulation
and information technique
MATERIALS OF CARBON BRUSHES
ESSENTIAL GROUPS OF CARBON MATERIALS FOR THE BRUSHES OF ROTARY ELECTRIC MACHINES
Graphites
The basic raw material for production of these brushes, quality of which is in the natural graphite, is compound of pitch or tar. We can achieve a great
varnishing and lubricating effect depending on the ash amount. The prior quality of the materials is the high flexibility.
Carbongraphites
Materials coming out at the production of those are ash, kerosene coax, pitch and tar. After moulding they are baking at the temperature of 1000 oC. They
are hard relatively and make brushes varnishing. The current load can be applied on them only a little because of their lower flexibility.
Electrographites
The matters are rated to the most essential group of the carbon materials for the brushes to the rotary electric machines. The first phase for their production
is similar as at the production of carbongraphites, but these are baking once more becoming electrographites at the temperatures of approx. 2600 oC by
lapping on themselves the good electric and mechanical properties. They are fitted to electric machines of various outputs, where we should get a good
operational, commutation and friction capabilities such as durability of a brush and commutator.
Silvergraphites
They are produced from graphite and silver powder. The silvergraphites are destined mainly for servo-assisted steering at measuring techniques, devices
with silent run, military industry etc.
Metalgraphites
Starting materials for them are copper and graphite powder. Getting metalgraphites based on graphite and copper ratio we can employ either their good
friction properties or high electric conductivity. Their contact and internal resistance is relatively small. They are fitted to the machines with a high current
density and low commutation strain mainly.
SELECTION OF CARBON MATERIALS FOR BRUSHES OF ROTARY ELECTRIC MACHINES
Mark
Volume
Recommen. Circumferen- Recommen.
Specific
tial velocity pressure on elect.resist .
Hardness
Total vol- Coefficient
HRB
tage drop of friction
density
current
(mean value)
density
(max.)
brush
(mean value)
(mean value)
(max.)
(max.)
[g.cm-3]
[A.cm-2]
[m.s.-1]
[kPa]
[.m]
[-]
[V]
[-]
Applications
CARBONGRAPHITES
CG 311
1,55
12
55
25-35
800
85 HR 10/60
-
-
CG 336
1,55
8
30
25-35
450
85 HR 10/60
5,0
0,35
Small universal motors fed by pulsating current,Motors for handtools and home appliances
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG 337
1,50
10
50
25-35
550
100 HR 10/60
-
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
;CG 342
1,45
8
30
30-40
500
97 HR 10/60
7,0
0,30
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG-343
1,45
8
30
30-40
500
97 HR 10/60
7,0
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG 346
1,50
8
35
25-35
1050
85 HR 10/60
-
-
CG 349
1,55
8
35
30
750
95 HR 10/40
-
-
Small universal motors fed by AC- washing motors
Small universal motors fed by AC- washing motors
CG 354
1,60
8
BAKELITEGRAPHITES
CG 300
1,60
10
35
30
550
95 HR 10/40
-
-
Small universal motors fed by AC- washing motors
50
25-35
450
80 HR 10/40
-
-
CG 301
1,60
10
50
25-35
450
80 HR 10/40
-
-
Commutator motors hard commutation , Schrage motors
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG 302
1,55
10
50
25-35
325
100 HR 10/20
-
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG 306
1,52
10
50
25-35
2000
100 HR 10/20
-
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG-309
1,55
10
50
25-35
600
72 HR 10/40
-
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
CG 329
1,60
10
ELECTROGRAPHITES
50
25-35
375
85 HR 10/40
-
-
Small universal motors fed by pulsating current,Motors for handtools and home appliances
EG 605
1,67
10
50
30
33
90 HR 10/100
3,5
0,20
Generators and motors fed by pulsating current, traction motors
EG 615
1,65
10
50
30
33
73 HR 10/100
3,5
0,20
Generators and motors fed by pulsating current, traction motors
EG 616
1,67
10
50
30
33
90 HR 10/100
3,5
0,20
Generators and motors fed by pulsating current, traction motors
EG 624
1,65
10
40
18
20
77 HR 10/100
2,9
0,25
Direct-current machines up to 230 V, machines with bronze or copper rings
EG 637
1,65
10
50
30
34
83 HR 10/100
3,5
0,25
DC machines with variable loading, generators of bigger power and motors with pulse current, traction motors
EG 640
1,70
10
50
30
44
92 HR 10/100
3,3
0,20
Direct-current traction motors and traction motors fed by pulsating current
EG 642
1,70
10
50
30
44
100 HR 10/100
3,3
0,15
Direct-current traction motors and traction motors fed by pulsating current
EG 655
1,70
10
50
30
44
92 HR 10/100
3,3
0,20
Direct-current traction motors and traction motors fed by pulsating current
EG 657
1,70
10
50
30
44
100 HR 10/100
3,3
0,15
Direct-current traction motors and traction motors fed by pulsating current
EG 660
1,67
10
50
30
45
90 HR 10/150
3,3
0,15
Traction motors
EG 670
1,60
10
50
18-30
48
92 HR 10/100
3,5
0,20
Direct-current traction motors, direct current motors and generators
EG 673
1,57
10
50
20
14
82 HR 10/40
3,5
0,20
Traction motors of lower and medium outputs fed by direct current, generators
EG 676
EG 680
1,60
1,60
10
10
50
50
20
20
14
50
75 HR 10/60
97 HR 10/100
3,5
3,6
0,20
0,20
Traction motors of lower and medium outputs fed by direct current, generators , battery vehicles
Direct-current traction motors, generators exciters, AC motors
SELECTION OF CARBON MATERIALS FOR THE BRUSHES OF ROTARY ELECTRIC MACHINES
Mark
Volume
Recommend. Circumferen- Recommended Specific
Hardness
Total Coefficient
density
current
tial velocity
pressure on
elect.resist .
HRB
(mean value)
density
(max.)
the brush
(mean value)
(mean value)
(max.)
(max.)
[g.cm-3]
[A.cm-2]
[m.s.-1]
[kPa]
[.m]
[-]
[V]
[-]
[%]
8
80
20-25
18
93 HR 10/20
3,8
0,40
-
GRAPHITES
CG 318
1,53
of friction
Applications
Metal
voltage
drop
content
Machines with steel rings for high circumferential velocities turbogenerators,hydroalternators
SILVERGRAPHITES
Ag 35
2,60
20
Ag 93
6,90
27
20
20
20-25
20-25
5,75
0,06
95 HR 10/20
90 HR 10/40
-
-
35
93
Small el. machines in measuring & regul. technique,tachodynamos
Small motors with low voltage in scanning and information technique
0,18
104 HR 10/60
0,8
0,20
88
Brushes for grounding rings,max. current density 200 A/cm2/20s
METALOGRAPHITES
MG 406
5,15
15
20
30-35
MG 407
3,65
24
47
20-25
5,50
100HR 10/60
2,6
0,26
60
Small motors and generators for aviation
MG 408
MG 410
3,20
5,15
24
18
47
20
20-25
20
11,50
0,12
95 HR 10/60
72 HR 10/60
2,9
0,5
0,25
0,25
50
88
Small motors and generators for aviation
Asynchronous motors with rings,brushes for grounding rings,
starters up to 3 kW/12V , max. current density 200 A/cm2/20s
MG 414
5,60
24
20
30-40
0,09
60 HR 10/40
0,6
0,20
92
Startes up to 3 kW/12V
MG 415
3,90
16
25
20-25
0,25
75 HR 10/60
1,0
0,20
70
Generators and motors with rings
MG 420
4,40
18
35
20
0,22
90 HR 10/40
0,5
0,10
75
Modelling electric motors with permanent current density 160 A/cm2
MG 425
2,35
15
35
20-40
6,50
95 HR 10/40
2,0
0,20
25
Motors and generators by 48 V with current density by 25 A/cm2
MG 433
4,45
15
25
20-25
0,20
80 HR 10/40
1,1
0,20
75
Dynamos by 15 V, Generators and motors with rings
MG 442
3,50
15
30
20-25
0,75
90 HR 10/40
1,3
0,20
65
Brushes for grounding rings, asynchronous motors with rings
MG 456
2,50
15
35
30-40
3,50
95 HR 10/40
2,0
0,20
33
Auxilliary car motors 80 V current density 35 A/cm2
MG 457
2,65
15
35
30-40
1,00
95 HR 10/40
1,5
0,20
40
Generators and motors with rings current density 35 A/cm2
MG 458
2,75
15
35
30-40
3,50
90 HR10/40
2,0
0,20
42
Auxilliary car motors current density 35 A/cm2, battery vehicles
MG 459
2,75
15
35
30-40
2,50
90 HR10/40
2,0
0,20
40
Auxilliary car motors current density 35 A/cm2
MG 460
4,73
18
20
30-40
0,22
80 HR 10/60
0,7
0,20
81
Starters up to 1 kW/12V, small direct-current machines up to 80 V
MG 462
3,40
18
20
30-40
1,00
75 HR 10/40
1,5
0,20
58
Motors and generators up to 80 V, starters up to 3 kW/12V max.current density 200 A/cm2/20s
MG 463
4,20
18
20
30-40
0,45
85 HR 10/40
1,5
0,20
72
Motors and generators up to 80 V, starters up to 3 kW/12V
MG 464
3,60
18
20
30-40
0,30
95 HR 10/40
1,5
0,20
63
Startes up to 1,7 kW/12V
MG 466
2,50
15
35
30-40
8,00
83 HR 10/40
2,2
0,20
32
Motors and generators up to 80V, starters up to 6 kW/24V , battery vehicles
MG 469
3,38
16
30
18-23
0,80
85 HR 10/40
1,9
0,20
60
Motors and generators up to 80V, starters up to 6 kW/24V
MG 470
3,40
16
35
18-23
1,50
95 HR 10/40
1,5
0,20
55
Startes up to 6 kW/24 V
MG 473
4,15
18
20
30-40
0,30
95 HR 10/40
1,5
0,20
70
Startes up to 3 kW/12V
MG 475
3,40
14
30
18-23
0,92
70 HR 10/60
1,4
0,20
60
Generators and motors with rings and small motors
3/2005