Emotron CDU/CDX 48-008 [5/82] Explanation of terms

Emotron CDU/CDX 48-008 [5/82] Explanation of terms
EMOTRON DSV 5445/5444
21.04.09 Emotron
Page 5
Explanation of terms:
Nominal device current The current that is available at the device output, taking the operating
time into account.
Dynamic output current The current that is available at the device output for approx. 60
seconds. Declaration normally in %.
Motor frequency f
M
Motor nominal frequency on motor rating plate.
Number of motor poles p p = (f / n
N
) * 60 * 2 (p = value in front of the comma )
e.g. motor n
N
= 1450 1/min, at 50 Hz 4-pole machine.
Synchronous rotational speed n Synchronous speed of the motor operating at no load.
n = (f / p) * 60 (n is always larger than n
N
)
Nominal rotational speed n
N
Rotational speed of the motor operating at nominal load and nominal
frequency (as stated on motor rating plate).
P
Brake
Continuous power of the braking resistor
Load capacity Permitted payload of the lift car in kg.
v
max
Maximum speed of the lift car in metres per second.
η
Gear
Efficiency of the employed gear (value smaller than 1)
Characteristic factor Specific value for the employed motor
Lifting height Maximum height of the lift hoist way
Rotor flux Motor parameter that determines the excitation of the asynchronous
motor. (See Chapter 8.2).
Rotor time constant Motor parameter that determines the motor torque. (See Chapter 8.2).
Start delay Specifies the time in seconds between opening the brakes and start of
travel.
Stopping distance EH Distance that the lift car travels after reaching the level signal.
Braking ramp B Characteristic of braking gradient
Braking delay Specifies the time in seconds before the brake closes.
Run-up ramp HL Characteristic of run-up gradient.
Starting jerk Caused by static friction or mechanical "adhesion" during starting.
Suspension Determined by the number of guide pulleys in the lift hoist way
Translation ratio Gear reduction number.
Number of gear ratios Gear reduction number.
E.g. Declaration on gear 56 : 2 reduction 56, number of gear
ratios 2
1 Vpp – encoder type High quality encoder whose output signal has a sinusoidal profile with
a peak-to-peak value of 1 volt. (4 tracks)
TTL encoder type Encoder of average quality with transistor-transistor logic, i.e. output
signal has a rectangular shape and supply voltage is usually 5 V DC.
(4 tracks)
HTL encoder type Encoder of inferior quality with high-transistor logic, i.e. output signal
has a rectangular shape, but supply voltage is up to 30 V DC. (2
tracks, cannot be monitored)
Tracks Number of encoder signals that are displace by 90 ° to each other.

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