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US 7,071,643 B2Granted
Dual speed quad brush two pole motor system
AssigneeFasco Industries, Inc.
InventorsJustin M Prevo, Cynthia L Moore, Joseph R Butler
Life of this patent
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Abstract
A motor system includes four brushes electrically connected to a rotor. A stator includes two magnetic poles. A circuit selectively rotates the rotor at a first speed by applying a first voltage to a first of the brushes and a second voltage to a second of the brushes. The circuit selectively rotates the rotor at a second speed by applying the first voltage to the first brush or the second brush, and applying the second voltage to a third of the brushes and/or a fourth of the brushes.
Claims20
A motor system comprising:
- a rotor;
- four brushes electrically connected to said rotor, each of said four brushes being selectively connected to said rotor in one of at least two of a plurality of different states;
- a stator including two magnetic poles;
- and
- a circuit configured to selectively switch each of said brushes between the at least two different states such that said circuit may:
- rotate said rotor at a first speed in a first direction by connecting a first of said brushes in a first of the states, a second of said brushes in a second of the states, and a third and a fourth of said brushes in a third of the states;
- rotate said rotor at a second speed in the first direction by connecting said first brush in the first state, said third brush and said fourth brush in the second state, and said second brush in the third state;
- and
- rotate said rotor in a second rotational direction opposite to the first rotational direction by connecting said second brush in the first state and at least one of said first brush, said third brush and said fourth brush in the second state.
6 more elements
A motor system comprising:
- a rotor;
- four brushes electrically connected to said rotor, each of said four brushes being selectively connected to said rotor in one of at least two of a plurality of different states;
- and
- a circuit configured to selectively switch each of said brushes between the at least two different states such that said circuit may:
- rotate said rotor at a first speed in a first direction by connecting first of said brushes in a first of the states, a second of said brushes in a second of the states, and a third and a fourth of said brushes in a third of the states;
- rotate said rotor at a second speed in the first direction by connecting said first brush in the first state, said third brush and said fourth brush in the second state, and said second brush in the third state;
- and
- rotate said rotor in a second rotational direction opposite to the first rotational direction by connecting said second brush in the first state and at least one of said first brush, said third brush and said fourth brush in the second state.
5 more elements
Dependencies are inferred from the claim text.