Differences

This shows you the differences between two versions of the page.

--- astra_conv:conversion:cooling_system:cooling_system [2014/04/23 20:05]
richard
+++ astra_conv:conversion:cooling_system:cooling_system [2014/05/03 19:57] (current)
richard
@@ Line 53: / Line 53: @@
 {{:astra_conv:conversion:motor_cooler:p1110277.jpg?500|}}
-Temperature sensors - The double sensor is glued to the motor, one of the NTCs is for the cooler controller itself, the output of the other one is relayed to the temperature gauge in the dashboard (as long as the coolant heater is off).
+Temperature sensors - The double sensor is glued to the motor. One of the NTCs is for the cooler controller itself.
+The NTC sensor for the motor controller is fitted into a cable shoe and bolted to the motor controller's heat sink.
+The output of the second NTC on the motor is relayed to the temperature gauge in the dashboard (as long as the coolant heater is off). I later added a second NTC mounted on the controller heat sink and connected in parallel to this one, so the temperature gauge actually gives an (exaggerated) "combined" temperature of both motor and controller.
-The NTC sensor for the motor controller is fitted into a cable shoe and bolted to the motor controller's heat sink.
 {{:astra_conv:conversion:motor_cooler:p1110717.jpg?340|}} {{:astra_conv:conversion:motor_cooler:p1110879.jpg?340|}}
@@ Line 65: / Line 69: @@
 === function ===
-At 50°C, each fan will start at low speed (around 30% pulse width ratio). Up to 60°C, the pulse width ramps up linearly, and stays at 100% above 60°C. The coolant circulation pump will also be switched on at 50°C.
+At 50°C, the motor cooler fan will start at low speed (around 30% pulse width ratio). Up to 60°C, the pulse width ramps up linearly, and stays at 100% above 60°C. The coolant circulation pump will also be switched on at 50°C.
+The motor controller cooler got a dedicated "sharper" charateristics - it now starts at 45°C heat sink temperature, and reaches 100% duty cycle at 50°C already.
 When ignition is switched on, the pump and the fans will be switched on for a few seconds, for test purposes and to avoid that they seize due to long inactivity.

User Tools

Site Tools

Differences

Page Tools