TMP – Temperature sensor

The temperature sensor (TMP) block provides access to the temperature measurement from a PT100 or PT1000 sensor for drive applications.

The B-Box RCP supports up to two temperature sensors through the Motor Interface for B-Box RCP. It can be either PT100 or PT1000 platinum resistors. These sensors have a standardized linear resistance-to-temperature characteristic (see the table below).

The analog temperature measurement chain of the Motor Interface is agnostic to the type of resistor. Please refer to the datasheet on how to wire the sensors. As a result, the temperature sensor block does not require any knowledge of the sensor type, and parameters are normalized. The sensitivity of the sensors is 0.00385 pu/°C when normalized by the nominal resistance at 0°C. Similarly, the normalized offset is 1 pu.

Simulink block

Signal specification

• The output signal is the temperature in [°C].
• The sim input signal is used in simulation and represents the actual temperature, computed by the simulation plant model.
• The > input signal needs to be connected to the sampling clock generated by the CONFIG block to account for the exact sampling instant in simulation.

Parameters

• Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
• Motor Interface input selects which connector of the Motor Interface is used as an input.
• Temperature coefficient [pu/°C] defines the sensitivity of the platinum resistor, normalized in per unit.
• Resistance @ 0°C [pu] defines the value of the platinum resistor at 0°C, normalized in per unit.

PLECS block

Signal specification

• The output signal is the temperature in [°C].
• The sim input signal is used in simulation and represents the actual temperature, computed by the simulation plant model.
• The > input signal needs to be connected to the sampling clock generated by the CONFIG block to account for the exact sampling instant in simulation.

Parameters

• Device ID selects which B-Box/B-Board to address when used in a multi-device configuration.
• Motor Interface input selects which connector of the Motor Interface is used as an input.
• Temperature coefficient [pu/°C] defines the sensitivity of the platinum resistor, normalized in per unit.
• Resistance @ 0°C [pu] defines the value of the platinum resistor at 0°C, normalized in per unit.

C++ functions

void MotInt_EnableMotorInterface(unsigned int device=0);Code language: C++ (cpp)

void Tmp_AdjustSensorParams(tMotIntMachine machine, float tmpCoeff, float resistanceAtZeroK, unsigned int device=0);Code language: C++ (cpp)

float Tmp_GetTemperature(tMotIntMachine machine, unsigned int device=0);Code language: C++ (cpp)