Siemens Outboard Motor S120 ユーザーズマニュアル

Motor components of the built-in motor and options 

 

3.3 Cooling 

3.2.2 

Evaluation of the temperature sensors for motor protection 

Temp–S 

Temp–S is used to reliably protect the motor against overheating. If Temp–S responds, then 

the drive must be quickly shut down in order to prevent the drive converter from continuing to 

supply current to the stator (= additional thermal load). The current load level setpoint(s), 

requested from the closed-loop control, causes this thermal load and this can destroy the 

stator.  
Temp-S is evaluated by the SME12x module. The PTC 130°C is used for issuing a warning. 

If the temperature continues to rise, the PTC 150°C responds when its response 

temperature is reached at which point the stator must be immediately disconnected from the 

power supply. 
 

Temp–F 

Temp–F supplies an analog signal that is proportional to the temperature and for a 

symmetrical current load of the three-phase windings provides information about the average 

motor temperature. 
 

 

 

Note 
The temperature sensor (Temp–F) only senses the winding temperature between two 

phases or in one phase in the stator. However, the phases in the synchronous motor are 

loaded to different degrees depending on the particular operating mode, so that in the worst 

case, the phases that have not been measured have the higher temperatures. 

 

 

3.3 

Cooling 

The heat loss generated by the stator winding must be dissipated by a water-cooling system. 

For this purpose, the machine manufacturer must connect the cooling duct to a cooling 

circuit in a heat-exchanger unit. For characteristic curves indicating a rise in temperature and 

drop in pressure of the cooling medium between the inlet and return flow circuit in the cooler 

as a function of the volume flow rate, see "Technical data and characteristics". 
In certain operating statuses (e.g. at high speeds or in S1 mode), the rotor can heat up 

further due to iron loss. The rated motor torques specified in the data sheets (see "Technical 

data and characteristics") are valid during operation with water cooling with an inlet 

temperature of 35 °C and a rotor flange temperature of max. 60 °C. To ensure that these 

conditions are maintained, additional measures may have to be taken to cool the rotor. 

 

1FW6 Built-in torque motors 

48

 

Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3