An upright vacuum cleaner includes a cleaning head having a suction opening defined along a bottom thereof, a handle assembly connected to the cleaning head, a motor, and a blower connected to the motor and operable to generate suction through the suction opening upon operation of the motor. The vacuum cleaner further includes an electrical connection interface selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The electrical connection interface is electrically connectable to the motor via an electrical path such that an AC current is supplied to the motor when the AC power source is connected to the electrical connection interface, and a DC current is supplied to the motor when the DC power source is connected to the electrical connection interface.

An upright vacuum cleaner includes a cleaning head having a suction opening defined along a bottom thereof, a handle assembly connected to the cleaning head, a motor, and a blower connected to the motor and operable to generate suction through the suction opening upon operation of the motor. The vacuum cleaner further includes an electrical connection interface selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The electrical connection interface is electrically connectable to the motor via an electrical path such that an AC current is supplied to the motor when the AC power source is connected to the electrical connection interface, and a DC current is supplied to the motor when the DC power source is connected to the electrical connection interface.

A power tool includes a motor, a first power source access circuit, a first drive circuit, a second power source access circuit and a second drive circuit. The motor includes a rotor, a stator, a plurality of first-type windings and a plurality of second-type windings. The rotor is configured to rotate about a central axis. The stator includes a ring-shaped yoke portion, and a plurality of teeth. The plurality of first-type windings are configured to be wound around part of the plurality of teeth and the plurality of second-type windings are configured to be wound around other part of the plurality of teeth. The first power source access circuit is configured to access a first power source with a first voltage. The first drive circuit includes a plurality of first-type electronic switches connected between the plurality of first-type windings and the first power source access circuit. The second power source access circuit is configured to access a second power source with a second voltage. The second drive circuit includes a plurality of second-type electronic switches connected between the plurality of second-type windings and the second power source access circuit. The plurality of first-type windings and the plurality of second-type windings are spaced in a circumferential direction of the central axis.

A power tool includes a motor, a first power source access circuit, a first drive circuit, a second power source access circuit and a second drive circuit. The motor includes a rotor, a stator, a plurality of first-type windings and a plurality of second-type windings. The rotor is configured to rotate about a central axis. The stator includes a ring-shaped yoke portion, and a plurality of teeth. The plurality of first-type windings are configured to be wound around part of the plurality of teeth and the plurality of second-type windings are configured to be wound around other part of the plurality of teeth. The first power source access circuit is configured to access a first power source with a first voltage. The first drive circuit includes a plurality of first-type electronic switches connected between the plurality of first-type windings and the first power source access circuit. The second power source access circuit is configured to access a second power source with a second voltage. The second drive circuit includes a plurality of second-type electronic switches connected between the plurality of second-type windings and the second power source access circuit. The plurality of first-type windings and the plurality of second-type windings are spaced in a circumferential direction of the central axis.

The present disclosure is directed to a convertible battery pack having an improved switching circuit. The switching circuit includes a converter element having a plurality of contacts positioned in the converter element such that as the converter element slides within the battery pack the contacts move from a first position to engage a first set of contact pads to a second position to engage a second set of contact pads. The converter element includes a pair of springs for each of the plurality of contacts that force the contacts into engagement with the contact pads but also allow the contacts to adjust for imperfections in the contact pad surface or the manufacturing tolerances of the contact pads or a support board that holds the contact pads.

An upright vacuum cleaner includes a cleaning head having a suction opening defined along a bottom thereof, a handle assembly connected to the cleaning head, a motor, and a blower connected to the motor and operable to generate suction through the suction opening upon operation of the motor. The vacuum cleaner further includes an electrical connection interface selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The electrical connection interface is electrically connectable to the motor via an electrical path such that an AC current is supplied to the motor when the AC power source is connected to the electrical connection interface, and a DC current is supplied to the motor when the DC power source is connected to the electrical connection interface.

An upright vacuum cleaner includes a cleaning head having a suction opening defined along a bottom thereof, a handle assembly connected to the cleaning head, a motor, and a blower connected to the motor and operable to generate suction through the suction opening upon operation of the motor. The vacuum cleaner further includes an electrical connection interface selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The electrical connection interface is electrically connectable to the motor via an electrical path such that an AC current is supplied to the motor when the AC power source is connected to the electrical connection interface, and a DC current is supplied to the motor when the DC power source is connected to the electrical connection interface.

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.

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.

To provide a power tool capable of suppressing variations in motor characteristics between external power sources with different voltage while preventing an increase in the size of the power tool. The power tool includes: a motor including a stator on which a plurality of windings are wound and a rotor rotatable relative to the stator; an output unit driven by rotation of the rotor; a power source connection part connectable to an external power source serving as a driving power source of the motor; power source voltage detecting means configured to perform detecting a voltage of the external power source connected to the power source connection part; and connection form changing means configured to perform changing a connection form of the plurality of windings on the basis of the voltage of the external power source.