A vehicle mounted electrical power converter includes: a heatsink; a circuit board placed on or above the heatsink; a power semiconductor device mounted on or above the circuit board; a control board support base that is placed on and/or above the circuit board and that supports a control board; and a heat transfer member being interposed between the power semiconductor device and the control board support base and thermally coupling between the power semiconductor device and the control board support base.

A portable alternating current (AC) power adapter system for a plug-in electric vehicle (PEV) having a high voltage (HV) battery system and configured for bi-directional charging includes a charging connector including a first 240 volts AC (VAC) signal circuit, a second 240 VAC signal circuit, a 120 VAC ground circuit, and a proximity circuit comprising a resistor, the proximity circuit being configured to wake-up the PEV when the charging cable is connected to the plug-in charging port, and a charging power panel electrically coupled to the charging connector and including a charge plug port connected to the first and second 240 VAC signal circuits and the 120 VAC ground circuit and configured to be connected to a 120 VAC or 240 VAC external load, and a switching relay connected to the proximity circuit and configured to transition on/off to disable/enable exporting power from the HV battery system.

Service vehicles, such as compact service carts (e.g., compact electric vehicles), are described that support a variety of service applications. One such vehicle (100) generally includes a vehicle platform (102) and a service box (104). The vendor box (104) includes canopy doors (106) for each of the sides (110, 112, and 114). The canopy doors (106) are movable between a closed position, where the canopy door (106) encloses the service area (108), and an open position where the canopy doors (106) extend outwardly from the sides 110, 112 and 114. In the open position, the doors (106) thus function as a canopy to provide shade at the service area 108 and maximize the space available for rendering services on the sides (110, 112 and 114) of the box (104). The inventive vehicles are adaptable to meet the needs of a wide variety of service applications including food and beverage applications, medical applications, and others.

An active discharge circuit for electric vehicle inverter, the active discharge circuit intended to be connected in parallel with a DC link capacitor connected between positive and negative lines of a DC power link, wherein the circuit comprises a dissipative current source, a switch connected in series with the current source between the DC lines, and a controller connected to the switch and arranged to apply an activation signal in dependence of a control signal, the activation signal placing the switch in a conducting state, wherein the current source is configured to draw a discharge current and dissipate any energy stored in the DC link capacitor when the switch is in the conducting state. As long as the switch is closed by the activation signal, the current source will draw a constant current and dissipate power, and the voltage across the DC link capacitor will decrease linearly.

A switching circuit for an electric vehicle (EV) includes a first leg of the switching circuit, including a first switch and a second switch, that receives a first phase of three-phase alternating current (AC) electrical power; a second leg of the switching circuit, including a first switch and a second switch, that receives a second phase of three-phase AC electrical power; a third leg of the switching circuit, including a first switch and a second switch, that receives a third phase of three-phase AC electrical power; and a capacitor leg having two or more capacitors electrically connected in parallel with the first leg, the second leg, the third leg of the switching circuit, wherein the capacitor(s) permit zero sequence current flow through the first leg, the second leg, and the third leg while the three-phase AC electrical power is applied to the circuit.

The present disclosure discloses a vehicle propulsion system. The vehicle propulsion system includes a first electric machine including a first set of machine windings that are configured to cause a rotor to rotate about an axis to selectively drive a transmission during a first vehicle operating state and a second electric machine including a second set of machine windings that are configured to cause a rotor to rotate about an axis selectively drive the transmission during at least one of the first vehicle operating state or a second vehicle operating state. The second vehicle operating state different from the first operating state, and a number of series turns per phase for the first set of machine windings is different from a number of series turns per phase for the second set of machine windings.

Example embodiments of systems, devices, and methods are provided herein for controlling source current in systems having two or more energy sources. The source current can be controlled in a manner that seeks balance in one or more operating parameters of the sources while meeting load demand. Examples of operating parameters can include charge, temperature, voltage, state of health, current, and others. Example embodiments are described that utilize a balance factor for each parameter being balanced, where the balance factor can vary with the magnitude of the parameter being balanced. A reference current can be determined that is selected to satisfy the load demand while at the same time taking into account present offset values of the balanced operating parameters between the sources. The embodiments can be applied with the system in either a discharge or a charge state.

A power supply system 1 includes: a variable voltage power supply 7 that outputs power of a variable voltage from a pair of secondary-side input/output terminals 72p and 72n; and power lines 21 and 22 that connect the pair of secondary-side input/output terminals 72p and 72n and a load 4. The first power line 21 is provided with a first switch unit 31 and a third power line 23 that connects both ends of the first switch unit 31, and the third power line 23 is provided with a third switch unit 33, a DC power supply 30, and a second switch unit 32 in series. The fourth power line 24 connects the third power line 23 and the second power line 22. The fourth power line 24 is provided with a fourth diode 34a that allows an output current of the DC power supply 30.

A power supply system 1 includes: a DC power supply 30; a variable voltage power supply 7 serving as an isolated bidirectional DC/DC converter that outputs power of a variable voltage E2 from a pair of secondary-side input/output terminals 72p and 72n; a positive electrode power line 21 and a negative electrode power line 22 that are connected to both electrodes of the DC power supply 30; a switching circuit 5 including a plurality of arm switching elements 51, 52, 53, and 54 that connect the power lines 21 and 22 and a load 4; a backflow prevention switching element 34 that is provided on the positive electrode power line 21 between the pair of secondary-side input/output terminals 72p and 72n; a power supply driver 6 that operates the variable voltage power supply 7 and the backflow prevention switching element 34; and a switching circuit driver 8.

Provided is a converter including: a primary-side switching unit to be connected to a battery; a secondary-side switching unit to be connected to a motor; a transformer provided between the primary-side switching unit and the secondary-side switching unit; and a controller configured to control at least the secondary-side switching unit so as to output a voltage that depends on an output waveform profile of a desired waveform to the motor.