IP Library › Granted Patent US 8,390,220
Granted Patent B2
US 8,390,220 · App. 12/865,444 · Granted Mar 5, 2013

Device for controlling regeneration energy in an electronic motor drive having an LC filter to reduce conducted emissions from the motor back to the voltage source

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Quick Facts
Patent No.
US 8,390,220
App. No.
12/865,444
Granted
Mar 5, 2013
Kind
B2
Abstract

The present invention provides a unique improvement ( 23 ) in an electronic motor drive ( 20 ) having an LC filter ( 21 ) to reduce conducted emissions from a motor (M) back to a voltage source (V 1 ). The improvement broadly includes diode ( 24 ) in series with the inductor (L 1 ) of said filter to prevent transmission of regenerative power from the motor to said voltage source; and a bypass switch ( 25 ) arranged in parallel with the diode and selectively operable to enable transmission of regenerative power from the motor to said voltage source.

Claims (11)

1. In an electronic motor drive having an LC filter to reduce conducted emissions from a motor back to a voltage source, the improvement comprising:

a diode in series with the inductor of said filter to prevent transmission of regenerative power from said motor to said voltage source; and

a bypass switch arranged in parallel with said diode and selectively operable to enable transmission of regenerative power from said motor to said voltage source; and

wherein said LC filter is underdamped with more than 6 dB of peaking in the frequency domain.

2. The improvement as set forth in claim 1 wherein said switch is a transistor.

3. The improvement as set forth in claim 1 , and further comprising:

a freewheeling diode arranged to allow inductor current flow when said switch is turned off.

4. The improvement as set forth in claim 1 wherein said switch is controlled as a function of the voltage across said diode and said inductor.

5. The improvement as set forth in claim 1 wherein said switch is controlled as a function of the development of regenerative power.

6. The improvement as set forth in claim 1 wherein said switch is controlled as a function of a comparison between the input voltage and the output voltage.

7. The improvement as set forth in claim 1 wherein regenerative power is used to operate said switch.

Assignments (1)
SUPPLEMENTAL NOTICE OF SECURITY INTEREST IN PATENTS AND PATENT APPLICATIONS Recorded Mar 23, 2011
From: MOOG INC.
To: HSBC BANK USA, NATIONAL ASSOCIATION
Reel/Frame 026004/0530 →