MOTOR CONTROLLER FOR CONTROLLING AN ELECTRIC MOTOR

• US 20090284206A1
• Filed: 05/12/2009
• Published: 11/19/2009
• Est. Priority Date: 05/17/2008
• Status: Active Grant

• Current Assignee: Diehl AKO Stiftung & Company KG
• Original Assignee: Diehl AKO Stiftung & Company KG
• Inventors: Wende, Thomas, Frisch, Rainer
• Granted Patent: US 8,179,060 B2
• Time in Patent Office: Days
• US Class Current: 318/490
• CPC Class Codes: H02P 31/00 Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00

Abstract

A motor controller for controlling at least one electric motor has an operating signal generator for generating an operating control signal for the at least one electric motor and also a sound signal generator for generating a sound control signal. A mixer superimposes the sound control signal on the operating control signal in order to obtain a control signal for the at least one electric motor. It is then possible to dispense with loudspeakers and the like in the appliance which contains an electric motor with such a motor controller in order to output, for example, signal tones which indicate an operating state of the appliance to the user.

Claims

1. A motor controller for controlling at least one electric motor, comprising:

an operating signal generator for generating an operating control signal for the at least one electric motor;

a sound signal generator for generating a sound control signal; and

a mixer connected to said operating signal generator and to said sound signal generator, for superimposing the sound control signal on the operating control signal and to thereby obtain a control signal for controlling the at least one electric motor.

2. The motor controller according to claim 1, which further comprises a frequency converter connected to receive the control signal from said mixer.

3. The motor controller according to claim 1, which further comprises a frequency converter connected to receive the operating control signal from said operating signal generator and the sound control signal from said sound signal generator;

and wherein said mixer is integrated in said frequency converter.

4. The motor controller according to claim 1, wherein the sound control signal generated by said sound signal generator is suitable for generating signal tones, music, and/or speech by way of the electric motor.

5. The motor controller according to claim 1, wherein the electric motor is an electric motor in an electronic domestic appliance.