An outdoor unit includes: first, second, third, and fourth connection terminals all of which are connected to an indoor unit; a power converter; and a switch unit provided between the first connection terminal and the power converter. The indoor unit includes: a first indoor unit terminal connected to the first connection terminal; a second indoor unit terminal connected to the second connection terminal; a third indoor unit terminal connected to the third connection terminal; a fourth indoor unit terminal connected to the fourth connection terminal; and a switch provided between the first indoor unit terminal and the fourth indoor unit terminal. The switch unit includes: a first switch that is closed when receiving power supply from the second and fourth connection terminals; and a second switch connected in parallel with the first switch. AC power is applied to the first and second connection terminals. The indoor unit closes the switch upon receiving a start signal, and the outdoor unit closes the second switch after supply of AC power to the power converter starts.

A control circuit of a power converter includes a sensing circuit, a ramp signal generation circuit and a PWM circuit. The sensing circuit, coupled to an output circuit, provides a current sensing signal. The ramp signal generation circuit includes a transient circuit and a signal generation circuit. The transient circuit receives the current sensing signal and generates a variable reference voltage. The signal generation circuit provides a ramp signal according to the variable reference voltage. The PWM circuit provides a PWM signal to the output circuit according to the ramp signal. When current sourcing occurs, it continues for a first default time. A transient state during current sourcing continues for a second default time less than first default time. The variable reference voltage is changed from a default value to an adjusted value during the second default time and restored to the default value after the second default time.

A converter includes a DC bus, a first DC-DC converter, a second DC-DC converter, and a plurality of circulating current suppression circuits. The first DC-DC converter is coupled to the DC bus and includes a first plurality of switches. The second DC-DC converter is coupled to the DC bus in parallel with the first DC-DC converter. The second DC-DC converter includes a second plurality of switches. The plurality of circulating current suppression circuits are coupled to the DC bus and are further respectively coupled to the first DC-DC converter and the second DC-DC converter. Each of the plurality of circulating current suppression circuits has a resonant frequency at or around a switching frequency for the first and second pluralities of switches. The plurality of circulating current suppression circuits is configured to suppress current at or around the switching frequency and pass at least direct current.

Embodiments of this application disclose power feeding equipment and a power supply method, which relate to the field of power supply technologies, and resolve a problem that power supply efficiency of an existing power architecture is low, and high efficiency and energy saving cannot be implemented. A specific solution is power feeding equipment, including a power interface, a control unit, and N first power units. The power interface is coupled to each first power unit, and each first power unit is further coupled to a powered system. The control unit is coupled to each first power unit, and output power of the N first power units is greater than or equal to maximum required power of the powered system.

An apparatus includes a control circuit and a voltage regulator circuit coupled to a regulated power supply node. The voltage regulator circuit is configured to generate a power signal on the regulated power supply node using a reference voltage level. The apparatus further includes a control circuit that is configured to determine an operating mode using results of a comparison of a threshold value and a load current being drawn from the regulated power supply node by a load circuit. The control circuit may be further configured to set, in a first operating mode, the reference voltage level independently of the load current, and set, in a second operating mode, the reference voltage level using the load current.

A multi-phase current mode hysteretic modulator implements phase current balancing among the multiple power stages using slope-compensated emulated phase current signals and individual phase control signal for each phase. In some embodiments, the slope-compensated emulated phase current signals of all the phases are averaged and compared to the slope-compensated emulated phase current signal of each phase to generate a phase current balance control signal for each phase. The phase current balance control signal is combined with the voltage control loop error signal to generate a phase control signal for each phase where the phase control signals are generated for the multiple phases to control the phase current delivered by each power stage.

The invention relates to enhanced adjusting of the control variables for a DC-DC converter comprising multiple DC-DC converter modules (30-1, 30-2). For this purpose, alongside the conventional controlling of the individual DC-DC converter modules, an additional correction variable (K-1, K-2) is determined which can be added to the control variable (R4-1, R4-2). In particular, the correction variable can take into account individual properties of the DC-DC converter modules, such as component tolerances or similar. For this purpose, correction values suitable for the individual DC-DC converter modules can be determined in advance and stored in a non-volatile storage means. Using these previously stored links, the control variables for the individual DC-DC converter modules can be individually adjusted.

A power converter circuit that includes multiple phase circuits may employ coupled inductors to generate a particular voltage level on a regulated power supply node. In response to an initiation of an active time period, the phase circuits cycle, out of phase with each other, between on-times and off-times. To maintain the phase relationship between the operation of the phase circuits, each phase circuit generates a ramp current that is compared to the current flowing in its corresponding inductor and then halts an off-time based on a result of the comparison.

The application provides a power supply device comprising two input ports disposed at a front end of the power supply device; at least one fan disposed behind the two input ports and two isolated power supplies connected respectively to the corresponding one of the two input ports and disposed behind the two input ports and the at least one fan. Each of the isolated power supplies comprises a main power circuit having at least one module, and each module comprises a PCB and a magnetic element and/or switching devices. The at least one module includes an isolated circuit module comprises a transformer having windings formed by laying copper in the PCB and the magnetic core fixed on the PCB. And at least one fan is configured for heat dissipation of the at least one module.

A vehicle high-voltage charging system includes: an inverter connected to a rechargeable battery; a motor connected to the inverter and configured to supply power, which is provided to a neutral point of the motor, to the inverter; a first relay having one end connected to the charging power input terminal and an opposite end; a neutral point capacitor arranged on a by-pass path, wherein a first end of the by-pass path is connected to the neutral point and a charging power input terminal to which DC charging power is adapted to input, and a second end of the by-pass path is connected to the rechargeable battery and the opposite end of the opposite end of the first relay; characterized in that the charging system further comprises a second relay, wherein the in series second relay arranged in the by-pass path and with the neutral point capacitor.