A system for charging a battery for a vehicle using a motor driving system that operates a motor having a plurality of windings is disclose. The system includes a first inverter having a plurality of first switching elements, a DC terminal connected to the battery, and an AC terminal connected to one terminal of the plurality of windings, a second inverter having a plurality of second switching elements, a DC terminal selectively short-circuited/opened with the DC terminal of the first inverter, and an AC terminal connected to the other terminal of the plurality of windings, and a controller configured to control an electric connection state between the DC terminals of the first inverter and the second inverter and an open/short-circuited state of the first switching elements and the second switching elements.

Charging system and method using a motor driving system are proposed. The charging system includes a battery, an inverter to which D.C. power stored in the battery is applied, including a plurality of legs each including two switching elements, a motor including a plurality of coils of which first ends are respectively connected to connection nodes of the switching elements of each of the plurality of legs, and second ends are connected to each other to form a neutral point, and an inverter driving part configured to control switching of the switching elements, so that switching speeds of the switching elements are different for each mode of a motor driving mode and a charging mode so as to change magnitude of charging voltage supplied to the neutral point of the motor and to output the charging voltage to the battery.

A control device includes a communication circuit configured to acquire battery voltage information of a battery of an electronic device, and a control circuit configured to control, based on the battery voltage information, a charging voltage supply circuit that supplies a charging voltage to the electronic device at a contact point such that a voltage difference between the charging voltage and a battery voltage of the battery is a given set voltage.

The present disclosure provides a charging system and method and a power adapter. The system includes: a battery; a first rectification unit, configured to output a voltage with a first pulsating waveform; a switch unit, configured to modulate the voltage with the first pulsating waveform; a transformer, configured to output a voltage with a second pulsating waveform according to the modulated voltage; a second rectification unit, configured to rectify the voltage with the second pulsating waveform to output a voltage with a third pulsating waveform; and a control unit, configured to output the control signal to the switch unit to decrease a length of a valley of the voltage with the third pulsating waveform such that a peak value of a voltage of the battery is sampled.

The generator control device for vehicle is provided with a boost permission determination circuit capable of controlling the power generation rate, if there is communication between the engine control device and the generator control device for vehicle, the boost permission determination circuit performs the field current control so that the specified power generation rate is achieved by the communication, if there is no communication between the engine control device and the generator control device for vehicle, based on the rotation speed and temperature of the generator for vehicle, the boost permission determination circuit performs the field current control.

An apparatus and a method are provided for controlling a low DC-DC converter (LDC) in an electric vehicle by prioritizing respective controllers, connecting the controllers in series in ascending order according to priority, and determining a command voltage of the LDC on the basis of output voltages of the respective controllers. Accordingly, even when a controller with a highest priority is operating, controllers of lower priority continue operating. Thus, electrical load performance degradation caused by instantaneous overcurrent generated in state transitions is prevented.

A power supply device includes a rectifying unit for rectifying an AC input voltage, a voltage conversion unit including a switching element and configured to receive a rectified input voltage from the rectifying unit and obtain an output voltage voltage-converted by a switching operation of the switching element, and a voltage comparison unit configured to generate a comparison signal between the output voltage and a set output voltage. The power supply device further includes an oscillation unit configured to output a control signal having an oscillation period and an oscillation-stop period as a control signal for controlling an ON/OFF of the switching element. The oscillation period and the oscillation-stop period of the control signal are controlled by the comparison signal outputted from the voltage comparison unit, and a pulse duty ratio of the control signal in the oscillation period is variably controlled based on the input voltage.

Method and system for communicating between a first piece of equipment and a second piece of equipment connected to the first piece of equipment via a single-conductor transmission line, wherein data (DATA1, DATA2) are transmitted from the first piece of equipment to the second piece of equipment by pulse width modulation of a transmission signal emitted on the transmission line, and wherein data are transmitted from the second piece of equipment to the first piece of equipment by amplitude modulation of said transmission signal.

A charge method, an adapter and a mobile terminal are provided. The adapter negotiates with the mobile terminal about the charging mode and the charging current of the battery. When determining to charge the battery in the quick charging mode, the adapter adopts the unidirectional pulse current to perform a quick charge on the battery using the negotiated charging current.

A battery regenerative breaking control method applied in an electric vehicle is provided. The battery regenerative breaking control method includes: determining whether a battery pack is at a protection status when the electric vehicle is detected to be at a regenerative breaking status; recording a current battery error time point and obtaining a time threshold according to a current speed of the electric vehicle if it is determined that the battery pack is at the protection status; determining whether a current time is smaller than the time threshold; entering a first stage to adjust a pulse width modulation (PWM) duty cycle if the current time is smaller than the time threshold; and entering a second stage to adjust a PWM frequency if the current time is larger than the time threshold.