Method and system for dampening noise or vibration using a motor

Patent metadata

Field	Value
Publication number	US-9394138-B2
Application number	US-201013990117-A
Country	US
Kind code	B2
Filing date	Nov 30, 2010
Priority date	Nov 30, 2010
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A system for active control of noise and/or vibration includes an electric machine; at least one sensor for sensing at least one of noise and vibration in the machine and generating at least one of an audio signal representing noise and a vibration signal representing vibration; a controller obtaining at least one of the noise signal and the vibration signal, the controller generating control signals to reduce at least one of noise and vibration in the machine; and power electronics receiving the control signals and generating drive signals for the machine.

First claim

The invention claimed is:

1. A system for active control of noise and/or vibration, comprising:
an electric machine having a motor and traction sheave;
at least one sensor for sensing at least one of noise and vibration in the machine and generating at least one of a noise signal representing noise and a vibration signal representing vibration;
a controller obtaining at least one of the noise signal and the vibration signal, the controller generating control signals to reduce at least one of noise and vibration in the machine; and
power electronics receiving the control signals and generating drive signals for the machine, the drive signals driving the motor as an actuator to generate corrective forces to dampen at least one of noise and vibration in the machine.

2. The system of claim 1 wherein:
the at least one sensor generating the noise signal is an audio sensor.

3. The system of claim 1 wherein:
the at least one sensor generating the vibration signal is an accelerometer.

4. The system of claim 1 wherein:
the at least one sensor generating the vibration signal is mounted to a bedplate of the machine.

5. The system of claim 1 wherein:
the controller obtains a speed value indicative of a speed of the machine, the controller generating the control signals in response to the speed value and at least one of the noise signal and the vibration signal.

6. The system of claim 5 wherein:
the controller obtains the speed value internally.

7. The system of claim 5 wherein:
the controller obtains the speed value from an encoder in the machine.

8. The system of claim 5 wherein:
the controller generates control signals to reduce at least one of noise and vibration in the machine in response to the noise signal, vibration signal and speed value.

9. The system of claim 1 wherein:
the control signals include a correction component to reduce at least one of noise and vibration in the machine.

10. A method for active control of noise and/or vibration in a system, the method comprising:
sensing at least one of noise and vibration at an electric machine to generate at least one of a noise signal and a vibration signal;
generating control signals to reduce at least one of noise and vibration in the machine in response to at least one of the noise signal and the vibration signal;
generating drive signals for the machine in response to the control signals; and
applying the drive signals to a motor in the machine to reduce at least one of noise and vibration in the machine, the drive signals driving the motor as an actuator to generate corrective forces to dampen at least one of noise and vibration in the machine.

11. The method of claim 10 wherein:
sensing vibration is performed at a bedplate of the machine.

12. The method of claim 10 further comprising:
obtaining a speed value indicative of a speed of the machine, the generating the control signals to reduce at least one of noise and vibration in the machine is performed in response to the speed value and at least one of the noise signal and the vibration signal.

13. The method of claim 12 wherein:
obtaining the speed signal is performed internally by a controller.

14. The method of claim 12 wherein:
obtaining the speed signal is performed in response to an encoder in the machine.

15. The method of claim 12 wherein:
generating control signals is performed in response to the noise signal, vibration signal and speed value.

16. The method of claim 10 wherein:
the control signals include a correction component to reduce at least one of noise and vibration in the machine.

17. The method of claim 10 wherein:
the electric machine is part of an elevator system that imparts motion to an elevator car.

Assignees

• Blanc Arthur
• Blasko Vladimir
• Otis Elevator Co

Inventors

• Blanc Arthur
• Blasko Vladimir

Classifications

• B66B1/30 Primary

  effective on driving gear {, e.g. acting on power electronics, on inverter or rectifier controlled motor} · CPC title

• G01H1/12

  of longitudinal or not specified vibrations · CPC title

• G01H3/00

  Measuring {characteristics of} vibrations by using a detector in a fluid (G01H7/00, G01H9/00, G01H11/00 take precedence) · CPC title

• B66B7/00 Primary

  Other common features of elevators · CPC title