Power tool including soft braking to hard braking control
OwnerJoshua D. Widder, Zachary J. Evansinventors
Life of this patent
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Abstract
A power tool including a housing, a motor within the housing, a power switching circuit configured to control power provided from a power source to the motor, and an electronic controller. The electronic controller is connected to the sensor and the power switching circuit. The electronic controller is configured to control the power switching circuit to apply a soft braking force, control a conduction angle and a phase advance angle to increase the soft braking force, control, in response to the conduction angle reaching a maximum conduction angle and the phase advance angle reaching a maximum phase advance angle, the power switching circuit to apply a hard braking force.
Claims20
A power tool comprising:
- a housing;
- a motor within the housing;
- a power switching circuit configured to control power provided from a power source to the motor;
- and
- an electronic controller connected to the power switching circuit, the electronic controller configured to:
- control the power switching circuit to apply a soft braking force,
- control a conduction angle and a phase advance angle to increase the soft braking force, and
- control, in response to the conduction angle reaching a maximum conduction angle and the phase advance angle reaching a maximum phase advance angle, the power switching circuit to apply a hard braking force.
A power tool comprising:
- a housing;
- a motor within the housing;
- a power switching circuit configured to control power provided from a power source to the motor;
- and
- an electronic controller connected to the power switching circuit, the electronic controller configured to:
- control the power switching circuit to apply a soft braking force,
- monitor a speed of the motor,
- control a conduction angle and a phase advance angle to increase the soft braking force, and
- control, in response to the speed of the motor being reduced to a speed threshold value, the power switching circuit to apply a hard braking force.
A power tool comprising:
- a housing;
- a motor within the housing;
- a power switching circuit configured to control power provided from a power source to the motor;
- a sensor configured to measure an operational parameter of the power tool;
- and
- an electronic controller connected to the sensor and the power switching circuit, the electronic controller configured to:
- receive a signal from the sensor related to the operational parameter of the power tool,
- determine, during a startup phase, the operational parameter of the power tool based on the signal from the sensor,
- calculate a brake adjustment based on the operational parameter, and
- control, during a braking phase, braking of the motor based on the brake adjustment.
Dependencies are inferred from the claim text.