Motor-driven appliance
First Claim
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1. A motor-driven appliance comprising:
- a motor; and
a control unit that is configured to control a drive output to the motor, the control unit comprising;
a state amount detection unit that is configured to detect a state amount indicating an operational state of the motor;
a fluctuation range derivation unit that is configured to derive a fluctuation range of fluctuation in the state amount, based on the state amount detected by the state amount detection unit, the fluctuation range derivation unit being configured to derive the fluctuation range as (i) a difference between a maximum value of the state amount and a minimum value of the state amount in a decreasing section where the state amount decreases or (ii) a difference between the maximum value of the state amount and the minimum value of the state amount in an increasing section where the state amount increases;
a load presence/absence detection unit that is configured to detect whether the motor is in an unloaded state or in a loaded state, based on the fluctuation range derived by the fluctuation range derivation unit; and
a drive output unit that is configured to perform the drive output to the motor, based on the state detected by the load presence/absence detection unit.
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Abstract
A motor-driven appliance includes a motor and a control unit that controls a drive output to the motor. The control unit detects a state amount indicating an operational state of the motor to derive a fluctuation range of fluctuation in the state amount. The control unit detects whether the motor is in an unloaded state or in a loaded state, based on the derived fluctuation range to perform the drive output to the motor, based on the detected result.
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Citations
17 Claims
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1. A motor-driven appliance comprising:
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a motor; and a control unit that is configured to control a drive output to the motor, the control unit comprising; a state amount detection unit that is configured to detect a state amount indicating an operational state of the motor; a fluctuation range derivation unit that is configured to derive a fluctuation range of fluctuation in the state amount, based on the state amount detected by the state amount detection unit, the fluctuation range derivation unit being configured to derive the fluctuation range as (i) a difference between a maximum value of the state amount and a minimum value of the state amount in a decreasing section where the state amount decreases or (ii) a difference between the maximum value of the state amount and the minimum value of the state amount in an increasing section where the state amount increases; a load presence/absence detection unit that is configured to detect whether the motor is in an unloaded state or in a loaded state, based on the fluctuation range derived by the fluctuation range derivation unit; and a drive output unit that is configured to perform the drive output to the motor, based on the state detected by the load presence/absence detection unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A motor-driven appliance comprising:
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a motor; and a control unit that is configured to control a drive output to the motor, the control unit comprising; a state amount detection unit that is configured to detect a state amount indicating an operational state of the motor; a fluctuation range derivation unit that is configured to derive a fluctuation range of fluctuation in the state amount, based on the state amount detected by the state amount detection unit; a load presence/absence detection unit that is configured to detect whether the motor is in an unloaded state or in a loaded state, based on the fluctuation range derived by the fluctuation range derivation unit; and a drive output unit that is configured to perform the drive output to the motor, based on the state detected by the load presence/absence detection unit, wherein the control unit comprises; a fluctuation occurrence determination unit that is configured to determine, at each predetermined determination timing, whether the fluctuation range derived by the fluctuation range derivation unit is equal to or larger than a predetermined fluctuation occurrence detection threshold; a number-of-fluctuation-detections counting unit that is configured to count a number of fluctuation detections, which is a number of times the fluctuation range is determined by the fluctuation occurrence determination unit to be equal to or larger than the fluctuation occurrence detection threshold; and a number-of-fluctuation-detections determination unit that is configured to determine whether the number of fluctuation detections counted by the number-of-fluctuation-detections counting unit is equal to or larger than a predetermined number-of-fluctuation-detections threshold, and wherein the load presence/absence detection unit is configured to determine that the motor has been brought into the loaded state if the number of fluctuation detections is determined by the number-of-fluctuation-detections determination unit to be equal to or larger than the number-of-fluctuation-detections threshold. - View Dependent Claims (17)
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Specification