Motor-driven appliance
AssigneeMakita Corporation
InventorItsuku Kato
Life of this patent
Estimating the term…
Abstract
A motor-driven appliance of one aspect of the present disclosure includes a motor and a controller. The controller includes a physical quantity detector, a variation deriving portion, a loaded condition detector, and driving output portion. The physical quantity detector detects a physical quantity related to an operating state of the motor. The variation deriving portion derives a variation in the physical quantity based upon the physical quantity detected by the physical quantity detector. The loaded condition detector detects that the motor is under a loaded condition in which the motor is applied with a load based upon the variation derived by the variation deriving portion. The driving output portion generates the driving output corresponding to whether the loaded condition is detected by the loaded condition detector.
Claims18
A motor-driven appliance comprising:
- a motor;
- an appliance element configured to be driven by the motor;
- and
- a controller configured to control a driving output to drive the motor, the controller comprising:
- a physical quantity detector configured to detect a physical quantity related to an operating state of the motor;
- a variation deriving portion configured to derive a variation in the physical quantity based upon the physical quantity detected by the physical quantity detector;
- a loaded condition detector configured to detect that the motor is under a loaded condition in which the motor is applied with a load based upon the variation derived by the variation deriving portion;
- and
- a driving output portion configured to generate the driving output corresponding to whether the loaded condition is detected by the loaded condition detector, the driving output portion being configured to generate the driving output capable of driving the motor to drive the appliance element at a first speed when the loaded condition is not detected by the loaded condition detector and to generate the driving output capable of driving the motor to drive the appliance element at a second speed when the loaded condition is detected by the loaded condition detector, the first speed being a predetermined constant speed, and the second speed being higher than the first speed.
A motor-driven appliance comprising:
- a motor;
- an appliance element configured to be driven by the motor;
- an operating portion configured to be operated by a user of the motor-driven appliance;
- and
- a controller configured to control a driving output to drive the motor, the controller comprising:
- a physical quantity detector configured to detect a physical quantity related to an operating state of the motor;
- a variation deriving portion configured to derive a variation in the physical quantity based upon the physical quantity detected by the physical quantity detector;
- a loaded condition detector configured to detect that the motor is under a loaded condition in which the motor is applied with a load based upon the variation derived by the variation deriving portion;
- and
- a driving output portion configured to generate the driving output corresponding to whether the loaded condition is detected by the loaded condition detector, the driving output portion being configured to generate the driving output capable of driving the motor to drive the appliance element at a predetermined constant speed when the loaded condition is not detected by the loaded condition detector and to generate the driving output capable of driving the motor to drive the appliance element at a speed corresponding to an operation amount to the operating portion when the loaded condition is detected by the loaded condition detector.
A motor-driven appliance comprising:
- a motor;
- a trigger configured to be pulled by a user of the motor-driven appliance;
- a loaded condition detector configured to detect that a loaded condition in which the motor is applied with a load;
- and
- a motor driver configured (i) to drive the motor at a first rotational speed corresponding to a pulling amount of the trigger in a case where the loaded condition is not detected by the loaded condition detector and the pulling amount is less than a predetermined amount, (ii) to drive the motor at a predetermined second rotational speed in a case where the loaded condition is not detected by the loaded condition detector and the pulling amount is the predetermined amount or more, and (iii) to drive the motor at a third rotational speed corresponding to the pulling amount in a case where the loaded condition is detected by the loaded condition detector, the second rotational speed being higher than the first rotational speed, and the third rotational speed being higher than the second rotational speed.
Dependencies are inferred from the claim text.