A power fluctuation mitigation system for use in a power supply system that supplies AC power to a load includes an inverter unit including a first converter connected to an AC power supply to perform DC/AC conversion, a DC intermediate condenser, and an inverter connected to the first converter through the DC intermediate condenser to perform DC/AC conversion, and a power fluctuation mitigating device including a second converter connected to the AC power supply to perform AC/DC conversion, a capacitive storage device configured to be charged by an output of the second converter, and a charging unit to charge the DC intermediate condenser with power stored in the capacitive storage device, wherein the charging unit supplies power from the capacitive storage device to the DC intermediate condenser upon occurrence of fluctuation in an output of the inverter unit occurring in response to fluctuation in the load.

In a method of DC voltagepulse voltage conversion, DC voltage is provided; a succession of controlling square pulses having adjustable pulse ratio is generated; an inductive load is periodically connected to outputs of a source of the DC voltage using the succession of the controlling square pulses; pulse current flowing through the inductive load is generated; a predefined value of resistance of an electronically-controlled resistor included in a circuit of the pulse current flowing through the inductive load is formed, and the pulse current is adjusted by the electronically-controlled resistor, whereby adjusting the level of pulse electromagnetic noise radiated to the environment is achieved.

In a method of DC voltagepulse voltage conversion, DC voltage is provided; a succession of controlling square pulses having adjustable pulse ratio is generated; an inductive load is periodically connected to outputs of a source of the DC voltage using the succession of the controlling square pulses; pulse current flowing through the inductive load is generated; a predefined value of resistance of an electronically-controlled resistor included in a circuit of the pulse current flowing through the inductive load is formed, and the pulse current is adjusted by the electronically-controlled resistor, whereby adjusting the level of pulse electromagnetic noise radiated to the environment is achieved.

A driving system includes a first alternating-current rotary electrical machine and a second alternating-current rotary electrical machine. The driving system includes: a first inverter electrically connected to the first alternating-current rotary electrical machine; a second inverter electrically connected to a first end of each of phase windings constituting the second alternating-current rotary electrical machine; a step-up converter; and a third inverter that is electrically connected to a second end of each of the phase windings and transfers power to a second direct-current power source different from the first direct-current power source to drive the second alternating-current rotary electrical machine. The step-up converter raises an output voltage of the first direct-current power source and outputs the output voltage to the first inverter and the second inverter. The second direct-current power source and the first alternating-current rotary electrical machine are connected by a single connection route.

A driving system includes a first alternating-current rotary electrical machine and a second alternating-current rotary electrical machine. The driving system includes: a first inverter electrically connected to the first alternating-current rotary electrical machine; a second inverter electrically connected to a first end of each of phase windings constituting the second alternating-current rotary electrical machine; a step-up converter; and a third inverter that is electrically connected to a second end of each of the phase windings and transfers power to a second direct-current power source different from the first direct-current power source to drive the second alternating-current rotary electrical machine. The step-up converter raises an output voltage of the first direct-current power source and outputs the output voltage to the first inverter and the second inverter. The second direct-current power source and the first alternating-current rotary electrical machine are connected by a single connection route.

A power conversion apparatus is provided, which comprises a housing, a main board, a first electromagnetic filtering board, a second electromagnetic filtering board, a signal board, a capacitor board, and a heat-dissipation module. The housing includes a heat-dissipation wall and a coolant runner. The main board is disposed upon the housing and comprises a first surface facing the housing and a power device. The heat-dissipation module includes an thermal conductive insulating sheet adhered to the heat-dissipation wall and an elastic clamp. When the main board approaches the housing to clamp the power device in the accommodating space between the elastic clamp and the thermal conductive insulating sheet, the power device is pressed against by the elastic clamp and thus adhered to the thermal conductive insulating sheet, so that the power device is thermally coupled to the heat-dissipation wall and the coolant runner via the thermal conductive insulating sheet.

A conversion circuit for converting a current signal into a first output voltage signal, where the current signal flows through a sensing component, is provided. The conversion circuit includes: a first current eliminating circuit, configured to eliminate a first current in the current signal. The first current eliminating circuit includes: a current sample and hold circuit; and a current driving circuit, coupled between the sensing component and the current sample and hold circuit; a second current eliminating circuit, coupled to the sensing component and configured to eliminate a second current in the current signal; and an integrating circuit, coupled to the sensing component and configured to integrate a third current in the current signal, and output a first input voltage signal between a first integration output terminal and a second integration output terminal.

An apparatus can include a bridge circuit for applying one or more pulse edges to a resonant circuit, the bridge circuit having a first limb in which a first connection point is connected to ground, and a second limb having a third transistor connected between a first power source and a second connection point and a fourth transistor connected between the second connection point and ground, wherein the resonant circuit can include an inductive element and a capacitor connected in series between the first and second connection points, wherein the inductive element is for inductively heating a susceptor, wherein each applied pulse edge induces a pulse response between the capacitor and the inductive element of the resonant circuit, wherein the pulse response has a resonant frequency.

A switching mode DC/DC power converter for delivering a direct current to a pulse radar unit. A first switching element connects and disconnects the power converter from a power source in each cycle of the power converter. An inductor charges and discharges in each cycle. A capacitor maintains a DC output voltage as the inductor charges and discharges in each cycle. A second switching element transfers energy from the inductor to the capacitor when the first switch disconnects the switching mode power converter from the power source. A control loop regulates the voltage with a time constant, to a predetermined value by controlling the first switching element. An on time for the first switching element in each cycle is chosen to allow the current through the inductor to fall to zero in each cycle. The cycle is shorter than RF pulse duration and time constant of the control loop is longer than the RF pulses.

A power converter including a load transient enhancing module and associated method for improving load transient response of the power converter. The load transient enhancing module detects whether load transient is occurring in a load of the power converter, and turns the secondary switch off and locks the secondary switch at OFF state to turn on a body diode of the secondary switch once load transient is occurring in the load.