Electrical Machines - Basic Vocational Knowledge
 7. Single-phase alternating current motors
 7.4. Single-phase commutator motors (universal motors)
 7.4.1. Assembly 7.4.2. Operating principles 7.4.3. Operational behaviour 7.4.4. Technical data

7.4.4. Technical data

Foot commutator motors

Figure 123 - Dimensional images of a foot commutator motor (e.g. 70/IM 1001)

(1) Length side, (2) Drive side, 1;2 Variable

Survey 18 - Characteristic values of foot commutator motors

 Design/nominal size Rated current Rated speed Power input Power output A rpm W W 70/IM 1001 0.2 3000 30 12 0.15 3000 27.5 16 0.11 5000 25 12 0.27 5000 48 25 87/IM 1001 0.26 3000 57 25 0.48 3000 85 40 0.55 3000 92 50 0.45 5000 95 40 0.36 5000 140 80 0.78 8000 165 100 1.1 8000 210 125 119/IM 1001 1.2 3000 180 125 1.7 5000 300 200 2.2 8000 450 320

Flange commutator motors

Figure 124 - Dimensional images of a flange commutator motor (e.g. 70/IM 3001)

(1) Length side, (2) Drive side, 1;2 Variable, (3) Earthing screw

Survey 19 - Characteristic values of flange commutator motors

 Design/nominal size Rated current Rated speed Power input Power output A rpm W W 70/IM 3001 0.2 3000 30 12 0.15 3000 27.5 16 0.11 5000 25 12 0.27 5000 48 25 87/IM 3001 0.26 3000 57 25 0.48 3000 85 40 without terminal boxes 0.45 5000 95 40 0.78 8000 165 100 87/IM 3001 0.55 3000 92 50 with terminal boxes 0.63 5000 140 80 1.1 8000 210 125 119/IM 3001 1.2 3000 180 125 1.7 5000 300 200 2.2 8000 450 320

Built-in commutator motors

Survey 20 - Characteristic values of built-in commutator motors

 Design/nominal size Rated voltage (Ws) Rated current Power input Power output Speed V A W W rpm Nominal sizes 220 0.6 105 50 3000 0.72 125 63 3000 0.86 165 80 3000 87/IM 5001 0.85 150 80 5000 1.0 175 100 5000 1.2 200 125 5000 1.2 235 125 8000 1.3 260 160 8000 1.65 315 200 8000 Nominal sizes 220 0.13 24 6 3000 0.17 28 8 3000 0.20 31 10 3000 52/IM 5001 0.18 37 10 5000 0.18 39 12 5000 0.25 47 16 5000 0.24 49 16 8000 0.30 55 20 8000 0.29 58 25 8000

Questions for repetition and control

1. How does a single-phase induction motor generate its rotating field?

2. Explain the operation of a three-phase asynchronous motor through a single-phase mains.

3. Explain the efficiency principles of the universal motor torque.

4. What must be heeded if a motor which had been connected to the alternating voltage mains, is to be driven by direct current?