A charging circuit of an on-board charger, where a second end of a first power conversion circuit of the charging circuit is coupled to a first end of a second power conversion circuit, a high-voltage output end of the second power conversion circuit charges a power battery pack of an electric vehicle, and a first low-voltage output end of the second power conversion circuit supplies power to a low-voltage system of the electric vehicle. The first power conversion circuit is configured to, when the electric vehicle is in a charging mode, convert an alternating current input from a first end of the first power conversion circuit into a direct current and transmit the direct current to the first end of the second power conversion circuit.

A system for protecting a vehicle inverter from overvoltage includes a first inverter having switching elements and converting energy from an energy storage device into AC power. A first motor is driven by receiving the converted AC power. A second inverter is connected in parallel with the first inverter, includes a switching elements, and converts energy from the energy storage device into AC power. A second motor is driven by receiving the converted AC power. A first capacitor is connected in parallel between the first inverter and the energy storage device and stores electric energy of the first motor during regenerative braking. A controller turns off a relay connecting the energy storage device and the motor when a voltage of the first capacitor is equal to or greater than a predetermined voltage and operates the switching elements in the inverters in response to first and second current commands.

Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak efficiency torque of the electric machine. When operating in the pulsed modulation mode, the inverter may be deactivated to further improve the system efficiency when field weakening is not required to mitigate or eliminate generation of a retarding torque in situations when Back Electromagnetic Force (BEMF) exceeds a supply voltage for the inverter of the machine.

A control unit (56) for a vehicle (10) with an electric drive (12) and an electromechanically actuated brake unit (14) includes a high-voltage DC link (20) disconnectably connected to a first energy store (24) of the electric drive (12), a converter (18) connected to the high-voltage DC link (20) and operable bidirectionally, and an electric motor (16) connected to the converter (18) for driving a wheel (50) of the vehicle (10). A brake drive circuit (36) is connected to the high-voltage DC link (20), and another electric motor (34), is connected to the brake drive circuit (36). A function block (55) has an input (69) for receiving a voltage signal (68) indicative of the voltage of the high-voltage DC link (20), a first output (63) for outputting a converter drive signal (60), and a first closed-loop controller unit (66) for generating the converter drive signal (60).

There is provided a vehicle control device including: an inverter that is configured to drive an electric motor; a DC/DC converter that is configured to step down a voltage output from a high voltage battery; a pre-charge circuit including a pre-charge switch; a voltage detector that is configured to detect an input voltage input to the inverter and the DC/DC converter; and a controller. When the input voltage is lower than the input voltage at the time when pre-charge of the inverter is completed, the controller is configured to determine that power supplied from a power supply of the DC/DC converter to the DC/DC converter is not normally stopped.

A system according to the present invention comprises: a power source which generates a first low voltage from a supplied high voltage; a capacitor which suppresses fluctuations in the high voltage; and a first device which operates by using the first low voltage as an electric power source and which increases its own current consumption when supply of the high voltage to the power source has stopped.

The present invention addresses the problem of properly performing motor control during overmodulation. In a motor control device 1, a carrier wave frequency adjusting unit 16 adjusts a carrier wave frequency fc so as to change a voltage phase error Δθv representing the phase difference between three-phase voltage commands Vu*, Vv*, Vw* and a triangular wave signal Tr. When a modulation factor H in accordance with the voltage amplitude ratio between the DC power supplied from a high voltage battery to an inverter and AC power output from the inverter to a motor exceeds a predetermined value, for example, 1.15, a current control unit 14 corrects the amplitudes and phases of a d-axis voltage command Vd* and a q-axis voltage command Vq* on the basis of a carrier wave phase difference Δθcarr representing the phase of the triangular wave signal Tr.

In accordance with at least one aspect of this disclosure, there is provided a system for aircraft power. The system includes a DC/DC converter having a DC input and a DC output and a switching circuit connecting the DC input to the DC output operable to vary voltage at the DC output. A control module is operatively connected to the switching circuit for variable control of the DC output. The control module includes machine readable instructions to cause the control module to receive input indicative of altitude and control the switching circuit to vary voltage of the DC output as a function of environmental conditions such as altitude and humidity. In embodiments the altitude sensor is operatively connected to the controller.

A charging system for mitigating charging failure for an electric aircraft, the system comprising a charger port located on the electric aircraft and configured to mate with a charging connector, a sensor communicatively connected to the charger port and configured to detect a charging datum, and a controller communicatively connected to the charger port and the sensor. The controller is configured to receive charging datum from the sensor, detect a charging failure as a function of a comparison between the charging datum to a pre-set charging datum threshold, and record the charging failure in a database.

The invention relates to a method for charging a vehicle battery by induction from a charging device including a charge transmitter including a primary coil L1 and an inverter capable of supplying the primary coil L1 with an AC supply voltage E. Said device also includes a charge receiver including a secondary coil L2 arranged in a vehicle. Said method consists of adjusting a frequency f of the power supply voltage (E) to the resonance frequency fo, when a motor vehicle is located in a parking space. Said method comprises the following steps: setting a first power-transmission parameter (E, f); starting an iterative test which consists of: setting a value of a second power-transmission parameter (E, f); varying the second power-transmission parameter (E, f) in a second authorized adjustment range; measuring the power (Pbat) transmitted between the charge transmitter and the charge receiver; determining if the power (Pbat) is no lower than a predetermined operating threshold (PObj); determining if the power (Pbat) increases; ending the iterative test if the transmitted power (Pbat) is higher than the predetermined operating threshold (PObj); setting the power supply voltage (E) in order to reach the measured transmitted power (Pbat), said first and second transmission parameters being set to the previously established value thereof.