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US 10,868,462 B2Granted
Power tool
AssigneePositec Power Tools (Suzhou) Co., Ltd.
InventorGuoliang Mou
Life of this patent
Estimating the term…
Abstract
An electric tool includes: a housing; a motor accommodated in the housing and providing power to a working component, the motor includes a stator including an excitation winding and a rotor including an armature winding, and the excitation winding is connected in series to the armature winding; a first power input unit, capable of connecting to an external AC power source so as to provide an alternating current to the motor; a second power input unit, capable of connecting to a battery component so as to provide a direct current to the motor; and a power source control unit, controlling the motor to obtain power input by using one of the first power input unit and the second power input unit. The electric tool can adapt to an AC power source and a DC power source, and the motor has a simple structure.
Claims20
An electric tool, comprising:
- a housing;
- a motor, accommodated in the housing and configured to provide power to a working component, wherein
- the motor comprises a stator comprising an excitation winding and a rotor comprising an armature winding, and the excitation winding is connected in series to the armature winding;
- a first power input unit configured to connect the motor directly to an external AC power source so as to provide an alternating current originating at the external AC power source directly to the motor;
- a second power input unit, configured to connect to a battery component so as to provide a direct current to the motor;
- and
- a power source control unit, configured to control the motor to obtain power input by using one of the first power input unit and the second power input unit.
4 more elements
An electric tool, comprising:
- a housing having a first groove and a second groove formed thereon;
- a first electrode disposed in the first groove;
- a second electrode disposed in the second groove;
- a series excited motor, accommodated in the housing and configured to provide power to a working component, the series excited motor electrically connected to one or more battery components via the first electrode and the second electrode, wherein
- the series excited motor comprises a stator, a rotor, and an electric brush, the stator comprises a stator iron core and an excitation winding, the rotor comprises a rotor iron core, an armature winding winded on the rotor iron core, a pivot configured to support the rotor iron core to rotate, and a commutator fixed on the pivot, the commutator is connected to the electric brush, and the excitation winding is connected to the armature winding in series;
- and
- a power source control unit, comprising a mode selection switch configured to operate in different working modes, wherein when the mode selection switch is in an AC working mode, the series excited motor obtains an alternating current, and when the mode selection switch is in a DC working mode, the series excited motor obtains a direct current via the first electrode and the second electrode.
4 more elements
An electric tool, comprising:
- a housing having a first groove and a second groove formed thereon;
- a series excited motor, accommodated in the housing and configured to provide power to a working component, wherein
- the series excited motor comprises a stator, a rotor, and an electric brush, the stator comprises a stator iron core and an excitation winding, the rotor comprises a rotor iron core, an armature winding winded on the rotor iron core, a pivot supporting the rotor iron core to rotate, and a commutator fixed on the pivot, the electric brush is connected to the commutator, and the excitation winding is connected to the armature winding in series;
- a first power input unit configured to connect the series excited motor directly to an external AC power source, the first power input unit further configured to provide an alternating current originating at the external AC power source directly to the series excited motor when connected to the external AC power source;
- and
- a second power input unit comprising a first electrode disposed in the first groove and a second electrode disposed in the second groove, the first electrode and the second electrode configured to electrically connect the series excited motor to one or more battery components so as to provide a direct current to the series excited motor, wherein
- power input voltages provided to the series excited motor by the first power input unit and the second power input unit are both within a predetermined voltage range of 80 V to 120 V.
4 more elements
An electric tool, comprising:
- housing;
- a series excited motor, accommodated in the housing and providing power to a working component, wherein
- the series excited motor is selectively connected to one of an AC power source and a battery component, the series excited motor is connected to an external AC power source and is configured to run after receiving an alternating current, the series excited motor is connected to one or more battery components and is configured to run after receiving a direct current, and power input voltages provided by the external AC power source and the one or more battery components are within a predetermined range from 80 V to 120 V.
Dependencies are inferred from the claim text.