Circuit for controlling dynamic braking of a motor shaft in a power tool
OwnerJeffery L. Henderson, Hong Moon +1inventors
InventorsJeffery L. Henderson, Hong Moon, Mark Wardrup
Life of this patent
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Abstract
A circuit for providing a braking force to a power tool is provided comprising a motor adapted to rotate a drive shaft in a power tool, a power supply electronically connected to the motor, and a braking module, located between the motor and the power supply, for applying a current limited braking force to the motor when the power supply is disconnected to the motor.
Claims40
A circuit for providing a braking force to a power tool, comprising:
- a motor adapted to rotate a drive shaft in a power tool;
- a power supply electronically connected to said motor;
- a braking module, located between said motor and said power supply, for applying a current limited braking force to said motor when said power supply is disconnected from said motor.
A power tool, comprising:
- a chuck holding a tool;
- a motor;
- a power supply;
- a braking module, located between said motor and said power supply, for applying a current limited braking force to said motor when said power supply is disconnected from said motor.
A braking circuit for providing a braking force to a motor of a power tool when the motor is disconnected from a power supply, the braking circuit comprising:
- a braking module having input and output terminals adapted to be electronically connected to a motor, said module applying a current limited braking force to said motor when said power supply is disconnected from said motor.
A circuit for limiting current flow through a power tool during deceleration of the motor when the power supply is disconnected, comprising:
- a motor adapted to rotate a drive shaft in a power tool;
- a power supply electronically connected to said motor;
- a current limiting switch, located between a motor and a power supply, for limiting the current passed through said motor when said power supply is disconnected from said motor.
Dependencies are inferred from the claim text.