Abbreviations and descriptions

–

–

The red characteristic curve for continuous duty is used for project planning. The configuration rule prescribes that the operating point of a cycle (M_{a_kub}) must be lower than the characteristic curve for continuous duty.

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–

The blue characteristic curve for short-time duty is used for project planning. The project planning rule prescribes that the black characteristic curve of the cycle or the maximum application torque M_max must be lower than the characteristic curve for short-time duty.

c_pr

Nm/arcmin

Tilting rigidity: Ratio of the applied breakdown torque to the resulting tilting angle at the output

c_tr

Nm/arcmin

Torsional rigidity: Ratio of the applied output torque to the resulting torsional angle at the output when the input side is blocked.

cdf

%

Maximum permitted cyclic duration factor that refers to the time proportion at speed ≠ 0 per cycle.

F_{A_a_N}

N

Nominal axial load at the gear unit output shaft, during continuous duty, with central force application, nominal speed n_{e_N}, nominal torque M_{a_N}, gear unit service life L, and without any radial load.

F_{A_a_pk}

N

Maximum permitted axial load at the output shaft of the gear unit during short-time duty, with centered force application, and without any present radial load.

f_dyn

–

Dynamic factor: Dynamic component during drive selection that describes a torque spike during the acceleration process.

F_{R_a_max}

N

Maximum permitted radial load at the gear unit output shaft during continuous duty. The center of the shaft end is the load application point.

F_{R_a_N}

N

Nominal radial load that occurs at the gear unit’s output shaft during continuous duty, at the force application point x = L/2 of the output-side solid shaft or x = 0 on the face end of the flange block shaft, in flange block gear units, nominal speed n_{e_N}, nominal torque M_{a_N}, gear unit service life L, without acting axial load.

F_{R_a_pk}

N

Maximum permitted radial load that may occur at the gear unit's output shaft during short-time duty, at the force application point x = L/2 for solid shafts or x = 0 on the face end of the flange block shaft, in flange block gear units without acting axial load.

Note: The value is defined without any active torque and without reference to speed. The force is applied from one direction and is not circumferential.

F_{R_kub}

N

Cubic radial load at cubic torque M_{a_kub}

F_{R_max}

N

Maximum radial load at the gear unit output shaft, calculated based on the project planning of the customer application.

f_Z

–

Transmission element factor when determining the radial load includes the influence of the transmission element on the output shaft of the gear unit.

I₀

A

Standstill current

I_max

A

Maximum current

J

10^-4 kgm²

Mass moment of inertia

J_BMot

kgm²

Mass moment of inertia of the brakemotor

J_ext

kgm²

External mass moment of inertia (in relation to the motor shaft)

J_Mot

kgm²

Mass moment of inertia of the motor

k

–

Inertia ratio J_ext / J_Mot

L

h

Service life at maximum permitted cyclic duration factor and maximum permitted cycle time, nominal output torque M_{a_N}, nominal input speed n_{e_N} and nominal overhung load F_{R_a_N}.

L₁

mH

Inductance between connection phase and neutral conductor

M₀

Nm

Standstill torque

M_4,100°C

Nm

Statistically smallest occurring value of the static braking torque in holding brake operation (at a friction surface temperature of +100 °C)

M_{a_dyn}

Nm

Maximum possible dynamic torque at the gear unit output taking into account the peak motor torque, the gear ratio and the gear unit efficiency

M_{a_es}

Nm

Maximum permitted torque at the output shaft of the gear unit during emergency stop. Maximally 1000 static events are permitted during the gear unit service life L.

M_{a_kub}

Nm

Effective cubic torque calculated from the configuration (operating point).

M_{a_N}

Nm

Nominal torque that occurs at the gear unit output shaft during continuous duty, at nominal speed n_{e_N}, nominal ambient temperature T_{amb_N}, maximum permitted housing temperature T_max, and gear unit service life L.

Information: The nominal radial load or nominal axial load can apply additionally. When radial and axial forces are acting simultaneously, the catalog data becomes invalid and the combined forces must be recalculated accordingly.

M_{a_pk}

Nm

Peak torque at the output shaft

m

kg

Mass

m_BMot

kg

Mass of the brakemotor

m_Mot

kg

Mass of the motor

M_{e_0}

Nm

Mean torque occurring at the gear unit input shaft, at no-load operation, at nominal speed n_{e_N}, and at nominal ambient temperature T_{amb_N}.

M_rms

Nm

Effective torque

M_{e_max}

Nm

Maximum torque at the gear unit input shaft.

M_{K_a_N}

Nm

Nominal breakdown torque during continuous duty with point of force application x = L/2 at the output shaft, nominal speed n_{e_N},, nominal torque M_{a_N},, gear unit service life L, without any axial load. The nominal breakdown torque is defined for the nominal radial load at x = L/2, which rotates around the input pressure point.

M_{K_a_pk}

Nm

Maximum permitted acceleration tilting torque during short-time duty, with point of force application x = L/2 at the output shaft, without any axial load. The acceleration tilting torque is defined for the lateral force of acceleration at x = L/2, which rotates around the input pressure point.

M_max

Nm

Maximum torque at the gear unit output shaft, calculated based on the project planning of the customer application.

M_pk

Nm

Dynamic limit torque

n_{a_m}

min^-1

Mean speed at the gear unit output shaft, calculated based on the configuration of the customer application.

n_c

min^-1

Speed class

n_eff

min^-1

rms speed

n_{e_N}

min^-1

Nominal speed at the gear unit input shaft, during continuous duty, at nominal torque M_{a_N}, nominal ambient temperature T_{amb_N}, maximum permitted housing temperature T_max and gear unit service life L.

n_{e_pk}

min^-1

Peak rotational speed at the input shaft

n_max

min^-1

Maximum speed required at the motor output shaft, calculated based on the project planning of the customer application. It is calculated based on the speed required at the gear unit output shaft by the customer application.

n_max,1

min^-1

Maximum permitted speed when the brake is applied in the event of an emergency stop

P_B

W

Braking power

P_{B_pk}

W

Maximum braking power

R₁

Ω

Resistance between connection phase and neutral conductor

T_amb

°C

Ambient temperature

T_{amb_N}

°C

Ambient temperature used as basis for calculating the permitted nominal values.

T_max

°C

Maximum permitted temperature

t_z

min

Maximum permitted duration of a repetitive reference cycle, that corresponds to the sum of all time components of motion and standstill.

V_N

V

Nominal brake voltage

V_{p0_cold}

V

Internal voltage in the motor induced into the stator winding by the exciter during no-load operation.

φ

arcmin

Rotational clearance: Synchronism difference from both directions of rotation

η

%

Efficiency