
—————— TPD32-EV ——————
58
2.6 MOTORS, ENCODER, TACHOMETER
The converters of the TPD32-EV series are provided for the regulation of DC motors with an independent exci
-
tation. As for speed feedback there is the use of a sinusoidal incremental encoder, a digital encoder or an analog
tachometer generator. In case of limited precision needs it is possible to use as feedback the armature voltage
without defluxing.
2.6.1 Motors
The electrical and mechanical data of the dc motors with an independent excitation refer to a particular function
-
ing field. The following points have to be taken into consideration in order to operate these motors:
Motor data necessary to connect it to a converter
The data on the motor nameplate:
- Armature rated voltage
- Armature rated current
- Field rated current
- Motor rated speed
Motor protection
Thermo relay of the motor
- Placed above the converter: dimensioning I
dN
• 0.82 • 1.05
- The relay contact can stop the drive through a control circuit or it can signal to the converter as an external
failure (terminal 15).
n
ote
!
Remember that with a thermo relay it is possible only to control the heating of the motor due
to an overload, but not the one due to an insufficient ventilation. For this purpose some PTC
thermistors or thermal switches should be inserted in the motor windings.
Thermistors and thermal switches
On terminals 78 and 79 it is possible to connect a thermistor or thermal switch in order to detect motor overheat
-
ing. When no temperature sensors are present an external resistor (R = 1 kohm) has to be connected to these
terminals. The connection of the sensor has to be done according the following instructions.
Thermistors (PTC)
PTC thermistors according to DIN 44081 or 44082 fitted in the motor can be connected directly to the converter vie
terminals 78 and 79. In this case the resistor (1 kohm) mounted between the terminals 78, 79 has to be removed.
Thermal switches (klixons) in the motor windings
Temperature-dependent contacts “klixon” type can disconnect the drive via the external control or can be reported
as an external error on the converter (terminal 15). They can also be connected to the terminals 78 and 79 in
order to have a specific error signal. In this case remove the 1 kohm resistor from these terminals and connect
it in series to the wiring.
Limitation of the converter current
The current limitation can protect the motor from unwanted overloads. To this purpose it is necessary to set
the current limitation and the control function of the converter overload (overload function), so that the current
remains within the values allowed for the motor.
n
ote
!
Remember that with a current limitation it is possible to control only the motor heating due
to an overload, but not the one due to an insufficient ventilation. For this purpose some PTC
thermistors or thermal switches should be inserted in the motor windings.
Summary of Contents for TPD32-EV-...-2B
Page 1: ... Instruction manual Industrial Application DC drives TPD32 EV ...
Page 372: ... TPD32 EV 372 9 BLOCK DIAGRAM 9 1 CONTROL BLOCK DIAGRAMS ...
Page 373: ... Instruction manual 373 ...
Page 374: ... TPD32 EV 374 ...
Page 375: ... Instruction manual 375 ...
Page 376: ... TPD32 EV 376 ...
Page 377: ... Instruction manual 377 ...
Page 378: ... TPD32 EV 378 ...
Page 379: ... Instruction manual 379 ...
Page 380: ... TPD32 EV 380 ...
Page 381: ... Instruction manual 381 ...
Page 382: ... TPD32 EV 382 ...
Page 383: ... Instruction manual 383 ...
Page 384: ... TPD32 EV 384 ...
Page 385: ... Instruction manual 385 ...
Page 386: ... TPD32 EV 386 ...
Page 387: ... Instruction manual 387 ...
Page 388: ... TPD32 EV 388 ...
Page 389: ... Instruction manual 389 ...
Page 390: ... TPD32 EV 390 ...
Page 391: ... Instruction manual 391 ...
Page 392: ... TPD32 EV 392 ...
Page 393: ... Instruction manual 393 ...
Page 394: ... TPD32 EV 394 ...
Page 395: ... Instruction manual 395 ...
Page 396: ... TPD32 EV 396 ...
Page 397: ... Instruction manual 397 ...
Page 398: ... TPD32 EV 398 ...
Page 399: ... Instruction manual 399 ...
Page 400: ... TPD32 EV 400 ...
Page 401: ... Instruction manual 401 ...
Page 402: ... TPD32 EV 402 ...
Page 501: ... Instruction manual 501 APPENDIX 3 ACCESSORIES A3 1 EAM Adapter Kit EAM1579 EAM1580 ...
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