Motor control for a vacuum cleaner
First Claim
Patent Images
1. A vacuum cleaner comprising:
- a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller configured to provide a notification to a user when the speed of the motor exceeds a threshold value.
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Accused Products
Abstract
A vacuum cleaner includes a nozzle, an air-filtering dirt receptacle, and a motor. A fan is configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface. A controller is configured to provide a notification to a user when the speed of the motor exceeds a threshold value.
33 Citations
20 Claims
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1. A vacuum cleaner comprising:
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a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller configured to provide a notification to a user when the speed of the motor exceeds a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vacuum cleaner comprising:
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a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller that provides a notification to the user indicative of an excessive amount of dirt in the receptacle when current drawn by the motor drops below a threshold value. - View Dependent Claims (10, 11, 12)
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13. A vacuum cleaner comprising:
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a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller configured to vary a ratio of on-time to total-time of pulse width modulated voltage applied to the motor to maintain a parameter of motor operation at a constant value, and to provide a notification to a user when the ratio exceeds or drops below a threshold value. - View Dependent Claims (14, 15)
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16. A vacuum cleaner comprising:
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a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller configured to control the motor to maintain a constant motor temperature. - View Dependent Claims (17, 18)
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19. A vacuum cleaner comprising:
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a nozzle;
an air-filtering dirt receptacle;
a motor;
a fan configured to be driven by the motor to drive a flow of air that carries dirt from a surface through the nozzle and into the receptacle to clean the surface; and
a controller configured to monitor a motor temperature and vary speed of the motor to keep the motor temperature from exceeding a preset value. - View Dependent Claims (20)
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Specification