Control system for an electric motor based on a pulsed control signal

A motor regulator comprising:

• an interface configured to receive a pulse width modulation control signal for controlling an electric motor;
• a detection unit in communication with the interface, the detection unit configured to detect a pulse frequency of the pulse width modulation control signal;
• and
• an adjusting unit in communication with the detection unit, the adjusting unit configured to adjust a value for at least one motor parameter for operating the electric motor in dependence on the detected pulse frequency.

A method of controlling an electric motor of a ventilator fan by means of a pulse width modulation control signal, comprising the steps of:

• selecting an operating mode with predetermined value assignments for a parameter set for controlling the electric motor;
• setting a pulse frequency of the pulse width modulation control signal in accordance with the selected operating mode in order thereby to signal to the electric motor the selected value assignments for the parameter set;
• detecting the pulse frequency of the pulse width modulation control signal at the ventilator fan;
• and
• setting the parameter set for operation of the electric motor in dependence on the operating mode determined by the detected pulse frequency.

A control system comprising:

• a control apparatus for controlling an electric motor by means of a pulsed control signal, wherein the control apparatus comprises:
• a selection unit configured to select an operating mode with predetermined value assignments for a parameter set for controlling the electric motor, and
• a frequency selection unit configured to select a pulse frequency of the control signal in accordance with the selected operating mode in order thereby to signal to the electric motor the selected value assignments for the parameter set;
• and
• a motor regulator comprising:
• an interface configured to receive the pulsed control signal for controlling an electric motor,
• a detection unit configured to detect the pulse frequency of the control signal, and
• an adjusting unit configured to adjust the parameter set for operation of the electric motor in dependence on an operating mode determined by the detected pulse frequency;
• wherein the motor regulator is controlled by the control apparatus.

A control apparatus for controlling an electric motor by means of a pulse width modulation control signal, wherein the control apparatus comprises:

• a selection unit configured to select an operating mode with predetermined value assignments for a parameter set for controlling the electric motor;
• and
• a frequency selection unit in communication with the selection unit, the frequency selection unit configured to select a pulse frequency of the pulse width modulation control signal in accordance with the selected operating mode in order thereby to signal to the electric motor the selected value assignments for the parameter set, and
• a pulse control unit configured to receive a control input signal and to receive the pulse frequency selected by the frequency selection unit, the pulse control unit configured to generate a pulse width modulated signal whose pulse duration is altered in dependence on the control input signal and whose frequency selects a value assignment for at least one parameter for operating the electric motor.