Motor Protection; Built-In Temperature Sensor; I²T Calculation - Jetter JM-206-230 User Manual

JetMove 206B-230
5.2
There are three ways of motor protection.
5.2.1
The JetMove 206B-230 servo amplifier is able to run by means of three different
temperature sensors and to evaluate their data:
5.2.2
The digital servo amplifier JetMove 206B-230 calculates the model of motor power
loss by an I²t calculation. The calculated value is a measure of the average power
dissipation of the motor. It is calculated in percent of the maximum motor power
dissipation.
For this calculation it is important, that the parameters are entered correctly:
– Continuous rated current (either continuous rated motor current or continuous
– Overload factor
– and time constant of the motor
The I²t calculation has to be activated by JetSym or by the PLC program.
It is possible to parameterize the warning level. The error level (error 30) is set to 100
%.
The I²t value is readable in a variable of JetMove 206B-230 through JetSym or the
PLC.
The digital servo amplifier JetMove 206B-230 calculates the percentage of motor
power loss according to the following formula:
Jetter AG

Motor Protection

Built-In Temperature Sensor

Sensor type Type of sensor signal evaluation
KTY83-110 The temperature is measured in °C.
The warning level is adjustable.
An error message is activated at maximum motor
temperature
PTC Go-no-go decision
An error message is activated at maximum motor
temperature
Temperature switch Go-no-go decision
An error message is activated at maximum motor
temperature
I²t Calculation
rated amplifier current, taking the lower value of the two)
5.2 Motor Protection
41