Patent ID: 9236824
Filing Date: 2016-01-12
CPC Classification: H02P

Claim Text:
1. A method for controlling an electric motor, comprising: receiving a user input at a controller, wherein the user input is indicative of a desired speed range for the electric motor for producing a substantially constant output power by the electric motor, the desired speed range being defined by a first speed value and a second speed value; determining a control parameter, using the controller, based on the desired speed range, the control parameter including a frequency value representing an operational range of the electric motor corresponding to the desired speed range, wherein the frequency value indicates a corner frequency corresponding to a corner speed, and wherein the desired speed range for the electric motor for producing a substantially constant output power is from the corner speed to a maximum speed of the electric motor; determining the control parameter includes determining the corner speed corresponding to the substantially constant output power according to the functional relationship between the output power and the rotational speed; the corner frequency defines a frequency range from the corner frequency to a maximum frequency for the electric motor; and the electric motor generates the substantially constant output power over the frequency range and within the desired speed range between the first speed value and the second speed value.