A vacuum cleaner includes a suction inlet, a motor, and an impeller connected to the motor and operable to generate suction through the suction inlet upon operation of the motor. The vacuum cleaner further includes a power connector mounted to the vacuum cleaner and selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The power connector includes external terminals accessible from an exterior of the vacuum cleaner. The external terminals are configured for removable mechanical connection to each of the DC power source and an AC power supply cord such that the DC power source and the AC power supply cord are selectively and mechanically connectable to the same external power connector terminals.

A vacuum cleaner includes a suction inlet, a motor, and an impeller connected to the motor and operable to generate suction through the suction inlet upon operation of the motor. The vacuum cleaner further includes a power connector mounted to the vacuum cleaner and selectively connectable to a direct current (DC) power source and an alternating current (AC) power source. The power connector includes external terminals accessible from an exterior of the vacuum cleaner. The external terminals are configured for removable mechanical connection to each of the DC power source and an AC power supply cord such that the DC power source and the AC power supply cord are selectively and mechanically connectable to the same external power connector terminals.

This application provides a motor drive system, a power system, and an electric vehicle, and relates to the field of power electronic technologies. The drive system is configured to drive a motor that uses a power battery pack as a power supply. The power battery pack includes at least two battery modules that are independent of each other, the drive system includes at least two direct current-alternating current DC-AC circuits, and the battery modules one-to-one correspond to the DC-AC circuits. Each battery module is correspondingly connected to an input end of one DC-AC circuit, and an output end of each DC-AC circuit is connected to a corresponding winding of the motor. The DC-AC circuit is configured to convert a direct current provided by the corresponding battery module into an alternating current to drive the corresponding winding of the motor.

A system for managing storage of electrical energy can include an electromagnetic machine and a controller. The electromagnetic machine can have a rotor and a stator. The rotor can be configured to be connected to a shaft. One of the rotor or the stator can have first windings and second windings. The controller can be configured to control first circuitry and second circuitry. The first circuitry can be configured to cause energy to flow from a first energy storage device to the first windings to cause the shaft to rotate. The second circuitry can be configured to cause energy to flow selectively: (1) from a second energy storage device to the second windings to cause the shaft to rotate or (2) from the second windings to the second energy storage device to cause the second energy storage device to be charged.

A system and method for integrated charging a vehicle includes a hybrid excitation machine, operable as a traction motor and including a rotor separated by an air gap from a stator with AC windings. An AC utility line power supply is connected to the AC windings providing an electrical current to the vehicle and inducing a magnetic flux across the air gap and in the rotor. A short circuit, an open circuit, or a DC voltage may be applied to a DC winding in the stator to reduce the magnetic flux into the rotor. A field coil in the rotor may be excited with a DC voltage using a secondary coil on the rotor in a traction mode. The secondary coil is excited by the stator windings using field-oriented control in a “self-excited machine” embodiment, and is directly excited by a separate primary coil in an “externally-excited machine” embodiment.

A power delivery system includes a first inverter, a second inverter, and a turbocharger assist device. The first inverter is electrically connected to a primary bus and configured to receive electric current from an alternator via the primary bus to supply the electric current to a first load. The alternator generates the electric current based on mechanical energy received from an engine. The second inverter is electrically connected to a secondary bus discrete from the primary bus. The turbocharger assist device is mechanically connected to a turbocharger operably coupled to the engine. The turbocharger assist device is electrically connected to the secondary bus and configured to generate electric current based on rotation of a rotor of the turbocharger. The second inverter is configured to receive the electric current generated by the turbocharger assist device via the secondary bus to supply the electric current to a second load.

A power delivery system includes a first inverter, a second inverter, and a turbocharger assist device. The first inverter is electrically connected to a primary bus and configured to receive electric current from an alternator via the primary bus to supply the electric current to a first load. The alternator generates the electric current based on mechanical energy received from an engine. The second inverter is electrically connected to a secondary bus discrete from the primary bus. The turbocharger assist device is mechanically connected to a turbocharger operably coupled to the engine. The turbocharger assist device is electrically connected to the secondary bus and configured to generate electric current based on rotation of a rotor of the turbocharger. The second inverter is configured to receive the electric current generated by the turbocharger assist device via the secondary bus to supply the electric current to a second load.

A conveyance system includes a machine having a motor; a source of AC power; a drive system coupled to the source of AC power, the drive system to provide multi-phase drive signals to the motor, the drive system including: a first drive having a first converter and a first inverter, the first convertor including a first positive DC bus and a first negative DC bus; a second drive having a second converter and a second inverter, the second convertor including a second positive DC bus and a second negative DC bus; wherein the first positive DC bus and the second DC positive bus are electrically connected and the first negative DC bus and the second negative DC bus are electrically connected.

A device includes a housing configured with a working element and a motor configured for urging motion of the working element. The device further includes a power control module. The power control module is configurable for being in electrical connection with at least one of the motor, a first power source configuration and a second power source configuration. The first power source configuration is configurable for being electrically connected to a battery assembly having a DC power output. The second power source configuration is configurable for being electrically connected to a power inverter, the power inverter configured for receiving an AC power and further configured for outputting a DC power to the second power source configuration. The power control module includes an automatic power selection configuration for automatically selecting the second power source configuration when the second power source configuration receives DC power from the power inverter.

A device includes a housing configured with a working element and a motor configured for urging motion of the working element. The device further includes a power control module. The power control module is configurable for being in electrical connection with at least one of the motor, a first power source configuration and a second power source configuration. The first power source configuration is configurable for being electrically connected to a battery assembly having a DC power output. The second power source configuration is configurable for being electrically connected to a power inverter, the power inverter configured for receiving an AC power and further configured for outputting a DC power to the second power source configuration. The power control module includes an automatic power selection configuration for automatically selecting the second power source configuration when the second power source configuration receives DC power from the power inverter.