Blown fuse sensor
First Claim
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1. A rotary electric machine comprising:
- a rotor;
an AC source disposed on said rotor;
a DC load disposed on said rotor; and
a rotating rectifier device disposed on said rotor connecting said AC source to said DC load and including a series connection rectifier and a fuse; and
a blown fuse sensor device disposed on said rotor for sensing occurrence of a failure of said rotating rectifier device, said blown fuse sensor device having a current transformer with a primary winding connected in series with said series connection, a secondary winding magnetically coupled to said primary winding for generating a pulse signal in response to a pulsating current flowing through said series connection, circuit means electrically coupled to said secondary winding for producing a signal indicative of the occurrence of a blowing of a fuse in response to an absence of said pulse signal for a predetermined period of time, an electrically insulating transformer connected between said secondary winding and said circuit means.
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Abstract
Each arm forming a three-phase full wave rectifier bridge includes a semiconductor diode, a current transformer and a fuse. The current transformer is connected to a pulse extinction indicator circuit through a pulse transformer. When no current flows through the arm for a predetermined time or more, the pulse extinction detection circuit produces a DC signal indicating the blowing of the fuse. The rectifier bridge, the current transformers, the fuses and the pulse extinction detection circuit are all disposed on the rotor of a brushless synchronous machine.
40 Citations
2 Claims
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1. A rotary electric machine comprising:
- a rotor;
an AC source disposed on said rotor;
a DC load disposed on said rotor; and
a rotating rectifier device disposed on said rotor connecting said AC source to said DC load and including a series connection rectifier and a fuse; anda blown fuse sensor device disposed on said rotor for sensing occurrence of a failure of said rotating rectifier device, said blown fuse sensor device having a current transformer with a primary winding connected in series with said series connection, a secondary winding magnetically coupled to said primary winding for generating a pulse signal in response to a pulsating current flowing through said series connection, circuit means electrically coupled to said secondary winding for producing a signal indicative of the occurrence of a blowing of a fuse in response to an absence of said pulse signal for a predetermined period of time, an electrically insulating transformer connected between said secondary winding and said circuit means. - View Dependent Claims (2)
- a rotor;
Specification
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsTaniguti, Ryosuke, Ishibashi, Naoto, Miyaji, Junichi, Ichinose, Yosaburo
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Primary Examiner(s)Robinson, Thomas A.
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Assistant Examiner(s)Myer, Daniel
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Application NumberUS06/112,142Time in Patent Office974 DaysField of Search340/645, 340/638, 340/639, 340/648, 340/635, 361/104, 310/68 R, 310/68 D, 363/50, 363/52, 363/53US Class Current340/638CPC Class CodesH02H 3/046 Signalling the blowing of a...H02K 11/042 Rectifiers associated with ...
