Selection of the MOVIONE^® drive unit

Observe the following procedure when selecting the MOVIONE^® drive unit:

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: M_{a max}≥ M_max.

On the basis of the application calculations and taking account of the efficiency, the maximum application torque during startup (first travel section) is M_max = 145 Nm.

Result: Helical-bevel gear units of size K.37 meet this requirement.

Selecting the gear ratio with suitable output speed:

Requirement: The application calculations result in a maximum required output speed of n_max = 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 n_e = n_N = 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.

Selecting a suitable motor:

Requirement: Select a motor/inverter combination that can provide at least at peak performance.

Result: Select the DRN80MK4 motor with the assigned inverter from the following table (from chapter "Technical data").

MOVIONE^® drive unit			DRN..
MOVIONE^® drive unit			71MS4	71M4	80MK4	80M4	90S4	90L4
Inverter				..0040..
Inverter nominal output current			0.72 A	1.02 A	1.29 A	1.75 A	2.55 A	3.4 A
Nominal power		P_N	0.25 kW	0.37 kW	0.55 kW	0.75 kW	1.1 kW	1.5 kW
Nominal torque		M_N	1.7 Nm	2.5 Nm	3.65 Nm	4.95 Nm	7.2 Nm	9.8 Nm
Overload capacity of M_N			200%

Checking further topics:

Feasibility of the selected motor/gear unit combination

Service factor

Checking the setting range:

Setting range of the application

This means the standard setting range of 1:10 (star connection) is sufficient.

Thermal check of the MOVIONE^® drive unit

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 with the assigned inverter has a nominal torque of 3.65 Nm.

Result: The requirements are met.

MOVIONE^® drive unit			DRN..
MOVIONE^® drive unit			71MS4	71M4	80MK4	80M4	90S4	90L4
Inverter				..0040..
Inverter nominal output current			0.72 A	1.02 A	1.29 A	1.75 A	2.55 A	3.4 A
Nominal power		P_N	0.25 kW	0.37 kW	0.55 kW	0.75 kW	1.1 kW	1.5 kW
Nominal torque		M_N	1.7 Nm	2.5 Nm	3.65 Nm	4.95 Nm	7.2 Nm	9.8 Nm
Overload capacity of M_N			200%

Checking further topics:

Derating due to increased ambient temperature

Derating due to installation altitude

MOVIONE®