Selection of the MOVIMOT® advanced drive unit

Observe the following points when selecting the MOVIMOT® advanced drive unit:

  1. Selection of a suitable gear unit size
    (Specification: Helical-bevel gear unit)
    • Requirement: The maximum output torque of the gear unit must be greater than the maximum required application torque: Ma max ≥ Mmax.
    • On the basis of the application calculations and taking account of the efficiency, the maximum application torque during startup (first travel section) is Mmax = 145 Nm.
    • Result: Helical-bevel gear units of size K.37 meet this requirement.
  2. Selecting the gear ratio with suitable output speed:
    • Requirement: The application calculations result in a maximum required output speed of nmax = 50 min-1.
    • To achieve a high setting range and an optimum efficiency, the required output speed should be achieved as precisely as possible at an input speed of ne = nN = 1400 min-1 (nominal motor speed with star connection).
    • Result: As there is no ideal gear ratio
      for the selected gear unit, the next smaller gear ratio available i = 24.99 is selected.
    • There are no external overhung loads acting on the gear shaft in this example.
  3. Selecting a suitable motor:
    • Requirement: Select a motor/inverter combination that can provide at least at peak performance.
    • Result: Select the DRN80MK4/D.. motor with the assigned inverter 2.0 A from the following table (from chapter "Technical data").

MOVIMOT® advanced

DRN..

71M4/D..

80MK4/D..

80M4/D..

90S4/D..

90L4/D..

100LS4/D..

Electronics cover (inverter)

0020

0020

0025

0032

0040

0055

Nominal output current of the electronics cover

2.0 A

2.0 A

2.5 A

3.2 A

4.0 A

5.5 A

Nominal power

PN

0.37 kW

0.55 kW

0.75 kW

1.1 kW

1.5 kW

2.2 kW

Nominal torque

MN

2.5 Nm

3.7 Nm

5.1 Nm

7.5 Nm

10.2 Nm

15 Nm

Overload capacity of MN

 

210%

210%

210%

210%

210%

210%

  1. Checking further topics:
    • Feasibility of the selected motor/gear unit combination
    • Service factor
  2. Checking the setting range:
    • Setting range of the application
    • This means the standard setting range of 1:10 (star connection) is sufficient. The encoder option must not be selected.
  3. Thermal checking of MOVIMOT® advanced
    • Requirement: In order to avoid thermal problems, the effective torque requirement of the application must be smaller than the continuous output torque of the drive unit.
    • The effective torque requirement (including the efficiency of the application) is 45.1 Nm, which corresponds to a torque requirement of at the motor shaft.
    • The selected motor/inverter combination DRN80MK4/D.. with the assigned inverter 2.0 A has a nominal torque of 3.7 Nm.
    • Result: The requirements are met.

MOVIMOT® advanced

DRN..

71M4/D..

80MK4/D..

80M4/D..

90S4/D..

90L4/D..

100LS4/D..

Electronics cover (inverter)

0020

0020

0025

0032

0040

0055

Nominal output current of the electronics cover

2.0 A

2.0 A

2.5 A

3.2 A

4.0 A

5.5 A

Nominal power

PN

0.37 kW

0.55 kW

0.75 kW

1.1 kW

1.5 kW

2.2 kW

Nominal torque

MN

2.5 Nm

3.7 Nm

5.1 Nm

7.5 Nm

10.2 Nm

15 Nm

Overload capacity of MN

 

210%

210%

210%

210%

210%

210%

  1. Checking further topics:
    • Derating due to increased ambient temperature
    • Derating due to installation altitude