Compressor ECU

+49 89 189600 - 3322


Especially with electric vehicles, noise emission plays an important role: therefore, the motor control is handled by vector control (FOC).

The engine rotational speed is determined via a CAN interface. The ECU regulates the rotational speed up to a maximum of 10.000 Umin-1 taking into account the available on-board supply voltage. The adjustable rotational speed of the engine enables a more efficient and requirement-oriented operation of the air conditioning system.


The control unit supplies galvanic separation of the on-board power supply and extensive voltage monitoring. Moreover, the ECU provides high resistance against voltage fluctuations and against short circuits in low-voltage and high-voltage ranges. The commutation of the motor phases can be carried out sensorless or sensored via rotor position sensor. The sensorless commutation in the lower rotational speed range poses a particular challenge here.



SILVER ATENA takes care of the entire engineering process, starting from the ECU specifications, on to the hardware and software development, the system and integration tests up to the delivery of the tested prototypes. Moreover, SILVER ATENA provides support for integrating the solution in the overall system and analyzing the customer's needs. Customers profit from competent consulting and development from a single source.


  • FOC Control for BLDC motors
  • Commutation w/ rotor position sensor
  • Speed control up to 10.000 Umin-1)
  • Supply of the power module from 300 V (on-board voltage)
  • High resistance to voltage fluctuations
  • Measurement of sensor signals (voltage, current, temperature)
  • Communication via high-speed CAN
  • High efficiency, low stand-by current

Compressor ECU



SILVER ATENA has developed a control unit for controlling the speed of an air conditioning compressor engine (BLDC motor). The power part of the ECU is fed by a 300V power supply and is galvanically separated from the 12V on-board power supply of the vehicle. The efficiency of the control unit is approximately 96%.


Actuation of electric motors in automotive high-voltage networks, e.g. A/C compressors for electric and hybrid vehicles.