Key to the project planning procedures

a_Bmax

m × s^-2

Maximum typical deceleration when braking

d₀

mm

Diameter of the output shaft transmission element

• Application

f_Ad

-

Dynamic application factor for checking the emergency stop function

• "Static and dynamic application factors f_As and f_Ad"  

• Technical data

f_As

-

Static application factor for checking the holding function

• "Static and dynamic application factors f_As and f_Ad"  

• Technical data

f_brake,output

-

Design-dependent output factor

• "Output factor f_brake,output"  
• Technical data

f_Mmax

-

Correction factor for determining the minimum braking time, minimum stopping distance, and maximum deceleration

• Load ranges for horizontal and vertical applications

• Technical data

f_Mmin

-

Reduction factor for determining max. braking time, max. stopping distance, and min. deceleration

• Load ranges for horizontal and vertical applications

• Technical data

f_EmergOff

-

Factor for determining M_aEmergOff depending on the gear unit

• Variables for determining the output load when braking

F_R,brake

N

Resulting gear unit load due to the radial force generated

F_Rapk

N

Permitted radial force on the output end for M_apk. Applies when the point of force application is at the center of the shaft end for solid shafts, or at the face end in the case of hollow shafts.

• Product documentation
• Variables for determining the output load when braking

F_RaEmergOff

N

Maximum permitted emergency‑stop radial force for the output shaft. Applies when the point of force application is at the center of the shaft end, or at the face end in the case of hollow shafts.

• Product documentation
• Variables for determining the output load when braking

f_V

-

Wear factor; determined based on the applied load range for braking work

• Load ranges for horizontal and vertical applications

• Technical data

f_Z

-

Correction factor for the radial force

• Product documentation

i

-

Gear unit ratio

• Product documentation

J_M

kgm²

Mass moment of inertia of the motor (incl. mount-on components), based on the motor shaft

• Product documentation

J_G

kgm²

Mass moment of inertia of the gear unit, based on the motor shaft

• Product documentation

J_L

kgm²

Mass moment of inertia of the application, based on the motor shaft

• Application

M_amax

Nm

Limit value of the gear unit load capacity: maximum permitted output torque

• Product documentation

M_aEmergOff

Nm

Limit value of the gear unit load capacity: maximum permitted emergency-stop torque

• Product documentation

M_apk

Nm

Limit value of the gear unit load capacity: maximum permitted peak torque

• Product documentation

M₁

Nm

Characteristic value of the dynamic braking torque

• "Definition of the characteristic values M_4,100 °C and M₁"  
• Selection tables for brakes and brake controls

M_4,100°C

Nm

Characteristic value of the static braking torque at +100 °C

• "Definition of the characteristic values M_4,100 °C and M₁"  
• Selection tables for brakes and brake controls

M_{brake, output}

Nm

Resulting gear unit load from the braking torque, based on gear unit output shaft

M_L

Nm

Static load torque at the motor shaft.

• Horizontal + vertical (upward):

The efficiency of the application and the gear unit are taken into account as unfavorable factors.

• Vertical (downwards):

The efficiency of the application and the gear unit are taken into account as favorable factors.

M_L,a

Nm

Static load torque value at the output shaft, efficiency not considered

• Application

N_B2

-

Number of permitted emergency-stop braking operations until brake maintenance

• Braking work until maintenance

N_B2max

-

Number of permitted emergency-stop braking operations until end of service life

• Braking work until maintenance

n_D

min^-1

Change in motor speed until brake application

n_m

min^-1

Relevant speed of the application referenced to the motor shaft

• Application

n_Max,0

min^-1

Maximum permitted operating speed of the brakemotor

• Limit speeds for brakes
• Technical data

n_Max,1

min^-1

Maximum permitted emergency stop speed depending on the use case

• Limit speeds for brakes
• Technical data

n_EmergStop

min^-1

Real emergency stop speed relevant for check

η_G

-

Gear unit efficiency

• Product documentation

η_G'

-

Back-driving gear unit efficiency (for gear units with η_G < 90%)

η_L

-

Efficiency of the application

• Application

s_Amax

m

Maximum typical stopping distance

• Definition of terms

s_Bmax

m

Maximum typical braking distance

• Definition of terms

t₂

s

Brake application time. Depending on the brake connection type, use t_2,I or t_2,II.

• Technical data
• Pulse frequencies of the brakes

t_2,I

s

Brake application time for cut-off in the AC circuit (AC shutdown)

• Technical data
• Pulse frequencies of the brakes

t_2,II

s

Brake application time for cut-off in the DC and AC circuit (AC/DC shutdown) as well as for DC-side disconnection (DC shutdown)

• Technical data
• Pulse frequencies of the brakes

t_Bmax

s

Maximum typical braking time

t_Bmin

s

Minimum typical braking time

t_Signal

s

System signal propagation time

• Application

v_L

m × s^-1

Relevant speed of the load or application at the point in time when the emergency stop is requested

• Application

v_EmergStop

m s^-1

Real speed of the load or application when the emergency stop begins

W₁

J

Maximum occurring braking work during emergency stop

W_insp

J

Permitted work until brake inspection

• Braking work until maintenance
• Technical data

W_per,n

J

Maximum permitted braking work for emergency stop depending on the emergency stop speed

• General information
• Technical data

W_per,T

J × h^-1

Permitted braking work depending on the number of braking operations per
hour

• General information
• Technical data

Z

h^-1

Required cycle switching frequency

• Application

Z_B0

h^-1

Maximum permitted no-load switching frequency of the brake (without considering the motor)

• Technical data

Z_B1

h^-1

Permitted emergency-stop switching frequency for BZ../BZ.D/BZ.Z brakes

• Load ranges for horizontal and vertical applications

Z_B1max

h^-1

Maximum permitted emergency-stop switching frequency (depending on the load range)

• Load ranges for horizontal and vertical applications