Thermal protection system for electrical appliance
First Claim
Patent Images
1. An electrical appliance, comprising:
- a housing;
a drive motor carried on the housing;
a temperature sensor carried on said housing, said temperature sensor monitoring an operating temperature of said drive motor;
a controller carried on said housing, said controller being responsive to said temperature sensor and adjusting current applied to said drive motor in response to a high temperature condition detected by said temperature sensor; and
a position sensor, selected from a group consisting of an accelerometer and a mercury switch, connected to said controller, upon said temperature sensor detecting said high temperature condition, said controller maintaining current applied to said drive motor in an adjusted condition until both said motor cools below said high temperature condition and said position sensor detects said electrical appliance in a restart position.
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Abstract
An electrical appliance includes a housing carrying a drive motor, a temperature sensor and a controller. The temperature sensor monitors the operating temperature of the drive motor. The controller is responsive to the temperature sensor. The controller adjusts the current applied to the drive motor in response to a high temperature condition detected by the temperature sensor.
18 Citations
9 Claims
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1. An electrical appliance, comprising:
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a housing; a drive motor carried on the housing; a temperature sensor carried on said housing, said temperature sensor monitoring an operating temperature of said drive motor; a controller carried on said housing, said controller being responsive to said temperature sensor and adjusting current applied to said drive motor in response to a high temperature condition detected by said temperature sensor; and a position sensor, selected from a group consisting of an accelerometer and a mercury switch, connected to said controller, upon said temperature sensor detecting said high temperature condition, said controller maintaining current applied to said drive motor in an adjusted condition until both said motor cools below said high temperature condition and said position sensor detects said electrical appliance in a restart position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrical device, comprising:
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an electric motor; a temperature sensor monitoring an operating temperature of said electric motor; a controller responsive to said temperature sensor and adjusting current applied to said electric motor in response to a high temperature condition detected by said temperature sensor; and a position sensor, selected from a group consisting of an accelerometer and a mercury switch, connected to said controller, upon said temperature sensor detecting said high temperature condition, said controller maintaining an adjusted condition until both said motor cools below said high temperature condition and said position sensor detects said electrical device in a restart position.
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Specification