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 Direct current motors
Asynchronous motors
General technical information
Technical Notes
Technical Notes PDF-Documents
Formulas of drive technology
Conversion-tables of drive technology
EC prototype test certificate
Certificates
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| To facilitate the calculation of DC motors, AC motors and their applications, we have put together some tables and parameters: |
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Power conversion
Values for the conversion |
| Unit |
hp |
kW |
PS |
kp m/s |
kg m2/s3 |
| 1 hp (horsepower) |
1 |
0,745700 |
1,01387 |
76,04 |
745,700 |
| 1 kW (Kilowatt) |
1,34102 |
1 |
1,35962 |
101,972 |
1000 |
| 1 PS (Pferdestärke) |
0,986320 |
0,735499 |
1 |
75 |
735,499 |
| 1 kp m/s (Kilopondmeter/s) |
13.151x10-3 |
9,807x10-3 |
13,333x10-3 |
1 |
9,80665 |
| 1 kg m2/s3(Watt) |
1,34102x10-3 |
1x10-3 |
1,35962x10-3 |
0,101972 |
1 |
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| 1 J ( 1 Joule) = 1 Nm = 1 Ws |
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| 1 Nm (Newtonmeter) = 1 J = 1 Ws
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| 1 W (Watt) = 1 J/s = 1 Nm/s |
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| Formulas for translation |
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| i |
Ratio |
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| n1 |
Drive rotation frequency |
(transmission input, the motor shaft) |
| n2 |
Output rotational frequency |
(gear drive, gear shaft) |
| M1 |
Drive torque |
(transmission input, the motor shaft) |
| M2 |
Output torque |
(gear shaft) |
| η |
Efficiency |
(eta, transmission) |
| P1 |
Drive power (Pan) |
(transmission input, the motor shaft) |
| P2 |
Drive power (Pab) |
(gear drive, gear shaft) |
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| Formulas for temperature conversion |
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| Formulas for conversion of length |
| inch |
in; ′′ |
1 in = 25,4 mm = 2,54 cm = 0,025 400 m |
| engl. foot or feet |
ft |
1 ft = 1′ = 12 in. = 30,48 cm = 0,3048 m |
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| Formulas for recalculation of weight |
| British ton |
long ton |
1 tn l = 20 l.ctw. = 160 st. = 2240 lb = 1016,0469088 kg |
| U.S. ton |
short ton |
1 tn sh = 20 sh.ctw. = 2000 lb = 907,18474 kg |
| Ounce |
ounce |
1 oz = 28,349523125 g |
| British pound |
pound |
1 lb = 16 oz. = 453,59237 Gramm |
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| Formulas for the space measure liquid measure conversion |
| British (imperial) gallons |
Imp.gal. |
1 Imp.gal. = 277,41945 inch³ = 4,54609 Liter |
| U.S. gallons |
US.liq.gal. |
1 US.liq.gal. = 231 inch³ = 3,785411784 Liter |
| Petroleum barrel |
ounce |
1 oz = 28,349523125 g |
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| British pounds |
= 42 US.gal. = 9702 inch³ = 158,9872949 Liter |
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| Pressure units and conversion factors |
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Pascal
(Pa) |
Bar
(bar) |
Technical atmosphere
(at) |
Physical atmosphere
(atm) |
Torr
(torr) |
Pound per
Square inch
(psi) |
N/m² |
Mdyn/cm² |
kp/cm² |
pSTP |
mmHg |
lbf/in.² |
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| 1 Pa |
1 |
1,0000 · 10-5 |
1,0197 · 10-5 |
9,8692 · 10-6 |
7,5006 · 10-3 |
1,4504 · 10-4 |
| 1 bar |
1,0000 · 10 5 |
1 |
1,0197 · 10 0 |
9,8692 · 10-1 |
7,5006 · 10 2 |
1,4504 · 10 1 |
| 1 at |
9,8067 · 10 4 |
9,8067 · 10-1 |
1 |
9,6784 · 10-1 |
7,3556 · 10 2 |
1,4223 · 10 1 |
| 1 atm |
1,0133 · 10 5 |
1,0133 · 10 0 |
1,0332 · 10 0 |
1 |
7,6000 · 10 2 |
1,4696 · 10 1 |
| 1 torr |
1,3332 · 10 2 |
1,3332 · 10-3 |
1,3595 · 10-3 |
1,3158 · 10-3 |
1 |
1,9337 · 10-2 |
| 1 psi |
6,8948 · 10 3 |
6,8948 · 10-2 |
7,0307 · 10-2 |
6,8046 · 10-2 |
5,1715 · 10 1 |
1 |
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| 1 dyn = 1 g · cm/s2; 1 N = 1 · 105 dyn; 1 Mdyn = 1 · 106 dyn |
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