Method for operating a synchronous motor excited by permanent magnets, electronic control device, motor arrangement, and storage medium

An electronic control device with instructions comprising:

• setting a maximum power;
• determining a current vector in the dq coordinate system;
• determining an output voltage vector in the dq coordinate system;
• calculating a setpoint amount for a setpoint voltage vector on the basis of the maximum power, the current vector and the output voltage vector;
• generating the setpoint voltage vector with the setpoint amount, and
• operating the permanent magnet synchronous motor at least with the setpoint voltage vector.

A motor arrangement comprising:

• a permanent magnet synchronous motor,
• an inverter for controlling the permanent magnet synchronous motor;
• and
• an electronic control device for controlling the inverter setting a maximum power;
• determining a current vector in the dq coordinate system;
• determining an output voltage vector in the dq coordinate system;
• calculating a setpoint amount for a setpoint voltage vector on the basis of the maximum power, the current vector and the output voltage vector;
• generating the setpoint voltage vector with the setpoint amount, and
• operating the permanent magnet synchronous motor at least with the setpoint voltage vector.