Solar Generator Control Module, Task

GF83.10-P-2183-01T Solar Generator Control Module, Task
- with CODE (419) Solar module for panoramic roof

Component Identification:

Task
The solar generator control unit (N34/1) supplies solar current from the solar cells (G6) of the top sliding roof via the blower regulator (A32n1) into the blower motor (A32m1). In the process a sun power of P = 500 W on the surface of the solar cells (G6) corresponds to approx. P = 50 W power output at the blower motor. The solar current is fed in by a relay in the supply line of the blower motor (A32m1).

The solar generator control unit (N34/1) serves the power adaptation of a solar module to the vehicle-internal blower. When the ignition is switched off (circuit 15R OFF) the solar generator control unit (N34/1) is supplied with solar energy and drives the vehicle-internal blower motor (A32m1). Air circulation increases along with any increase in solar radiation. The solar generator control module (N34/1) utilizes the power provided by the solar module as fully as possible.

The function of the solar generator control unit (N34/1) is kept so variable that it can operate with the following component variants:
- 3 lines with 8 cells (max. solar module power approx. 36 W at a module temperature of 25 °C)
- 4 lines with 6 cells (max. solar module power approx. 56 W at a module temperature of 25 °C)
- 6 lines with 5 cells (max. solar module power approx 70 W at a module temperature of 25 °C)

System activation
The vehicle is parked (circuit 15R OFF). The air conditioning bus and control voltage remain active for a "run-on time" of 2 minutes. In this time the vents are moved into a defined position. The control voltage is used for the solar generator control module (N34/1) as a trigger input.
One second after the "run-on time" has elapsed the solar generator control unit (N34/1) produces a control voltage. After a further 10 seconds the power produced by the solar cells (G6) is transmitted to the blower regulator (A32n1).

System deactivation
The vehicle is activated (circuit 15R ON). The AC bus and the control voltage of the AAC control and operating module (N22) or comfort automatic air conditioning (N22/7) are active. This is detected by the blower regulator (A32n1), the blower regulator (A32n1) thereupon leaves the emergency running mode, switches off and waits for data or commands from the AAC [KLA] control and operating unit (N22) or comfort automatic air conditioning (N22/7) .

Switchover
When the ignition is switched off (circuit 15R OFF) the circuit 30 connection between the AAC [KLA] control and operating unit (N22) or comfort automatic air conditioning (N22/7) and the blower regulator (A32n1) is disconnected. Now the circuit 30 connection between the blower regulator (A32n1) and solar generator control unit (N34/1) is made. If the ignition is switched on again (circuit 15R ON) the AAC [KLA] control and operating unit (N22) or comfort automatic air conditioning (N22/7) is connected again directly with the blower regulator (A32n1). The solar generator control unit (N34/1) does not deliver any more energy to the blower regulator (A32n1).

Generation of control voltage
In the event of no signal from the AAC [KLA] control and operating unit or comfort automatic air conditioning (N22) the solar generator control unit (N34/1) produces (N22/7) an auxiliary voltage of 12V short-circuit-proof. This auxiliary voltage does not act back on the 12 volt line of the AAC control and operating module (N22) or comfort automatic air conditioning (N22/7).

Motor protective circuit
The solar generator control unit (N34/1) must protect the blower motor (A32m1) connected to the blower regulator (A32n1) against overvoltage during solar operation. The start-up current of the blower motor (A32m1) must be limited. At output power greater than 10 W the solar generator control unit (N34/1) detects a locked-up blower motor (A32m1). The solar generator control unit (N34/1) then switches off its power output in order to prevent the blower motor (A32m1) from overheating. The solar generator control unit (N34/1) tries to make the blower motor (A32m1) start up again at regular intervals.