Patent ID: 11933308
Assignee: GRUNDFOS HOLDING A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  H | IPC F  H

Claim 8:
9. A method for controlling an electric motor for driving an impeller of a pump unit of a pump assembly, the method comprising:
receiving a pulse width modulated (PWM) control signal at an interface of the pump assembly;
interpreting the PWM control signal at start-up of the electric motor per default in a configuration mode as a configuration bit sequence based on a duty cycle of the PWM control signal during a pre-determined configuration window;
controlling the speed of the electric motor in a control mode according to the duty cycle of the received PWM control signal after a lapse of the configuration window; and
extending a length of the configuration window at least until the full configuration bit sequence has been received under a condition that a valid synchronization sequence was detected in the interpreted configuration bit sequence.