Temperature monitoring for a DC shunt-wound motor

Claim 2

Device for monitoring the temperature in a DC shunt-wound motor having a DC-shunt winding and constant shunt current feed for feeding constant current to said DC-shunt winding for driving rotary printing machines, comprising a temperature measuring sensor including the DC-shunt winding; means for sensing the DC-voltage across the shunt winding, having an output voltage being responsive to the temperature of the shunt winding; and an evaluation circuit being responsive to said output voltage for evaluating the temperature of the DC shunt-wound motor.

Claim 3

Device for monitoring the temperature in a DC shunt-wound motor having a DC-shunt winding and constant shunt current feed for feeding constant current to said DC-shunt winding for driving rotary printing machines, comprising a temperature measuring sensor including the DC-shunt winding; means for sensing the DC-voltage across said shunt winding, having an output voltage being responsive to the temperature of said shunt winding; an evaluation circuit being responsive to said output voltage for evaluating the winding temperature of said DC-shunt winding; and means responsive to the winding temperature for determining a mean value of spatially distributed heating of the DC shunt-wound motor.

Claim 4

Device for monitoring the temperature in a DC shunt-wound motor having a DC-shunt winding and constant shunt current feed for feeding constant current to said DC-shunt winding for driving rotary printing machines, comprising a temperature measuring sensor including the DC-shunt winding; means for sensing the DC-voltage across said shunt winding, having an output voltage being responsive to the temperature of said shunt winding; an evaluation circuit being responsive to said output voltage for evaluating the winding temperature of said DC-shunt winding; and means responsive to the winding temperature for determining a mean value of spatially distributed heating of the DC shunt-wound motor.

Claim 5

Device according to claim 2 including means for switching off the motor after a permissible maximum value of the temperature is exceeded.

Claim 6

Device according to claim 2, including means for generating a warning signal after a given temperature limiting value is exceeded.

Claim 7

Device according to claim 2, including means for reducing the rotary speed of the motor after a given temperature limiting value is exceeded.

Claim 8

Device according to claim 2 including a rotary speed sensor having a signal output being fed to said evaluation circuit.

Claim 9

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory wherein a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored; a comparator for comparing said maximum temperature increase behavior per unit time, during operation of the motor, with a respective instantaneous temperature increase per unit time; and means for switching off the motor when the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time.

Claim 10

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory wherein a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored; a comparator for comparing said maximum temperature increase behavior per unit time, during operation of the motor, with a respective instantaneous temperature increase per unit time; and means for switching off the motor when the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time.

Claim 11

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory in which a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored, a comparator for comparing said maximum temperature increase behavior per unit time during operation of the motor with a respective instantaneous temperature increase per unit time for outputting a signal, and actuating means being responsive to the output signal in which the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time, for generating at least one of a warning signal and a motor shut-off signal, said stored maximum temperature increase behavior per unit time being determined in accordance with characteristics of the motor.

Claim 12

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory in which a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored, a comparator for comparing said maximum temperature increase behavior per unit time during operation of the motor with a respective instantaneous temperature increase per unit time for outputting a signal, and actuating means being responsive to the output signal in which the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time, for generating at least one of a warning signal and a motor shut-off signal, said stored maximum temperature increase behavior per unit time being determined in accordance with characteristics of the motor.

Claim 13

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory wherein a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored; a comparator for comparing said maximum temperature increase behavior per unit time, during operation of the motor, with a respective instantaneous temperature increase per unit time; and means for generating a warning signal when the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time.

Claim 14

Device for monitoring the temperature in a DC shunt-wound motor for driving rotary printing machines, comprising a temperature measuring sensor formed of a DC shunt winding of the DC shunt-wound motor; a memory wherein a maximum temperature increase behavior per unit time within a given temperature range during normal operation of the motor is stored; a comparator for comparing said maximum temperature increase behavior per unit time, during operation of the motor, with a respective instantaneous temperature increase per unit time; and means for generating a warning signal when the instantaneous temperature increase per unit time is greater than the stored maximum temperature increase behavior per unit time.