A power conversion device includes first and second current detectors. A coil is connected a first power terminal through the first and second current detectors. A first switch has a source terminal connected to the coil and a second semiconductor switch has a drain terminal connected to the coil. A first diode is connected between a drain terminal of the first semiconductor switch and a second power supply terminal. A second diode is connected between a source terminal of the second semiconductor switch and the second power terminal. A capacitor is connected in parallel with the first and second diodes. A control circuit is configured to turn the first and second semiconductor switches on or off based on current detections of the first and second current detectors.

A switched-mode power supply has a rectifier device, a switching unit which is arranged downstream of the rectifier device, a transmission device which is arranged downstream of the switching unit and a filter device. In order to reduce the sensitivity of the switched-mode power supply to high-energy interferences, it is proposed that the filter device contains a current-compensated choke coil which is connected to a voltage limiter circuit in such a way that in the case of interference signals applied to the choke coil, a damping of the interference signals takes place by way of the voltage limiter circuit.

A switched-mode power supply has a rectifier device, a switching unit which is arranged downstream of the rectifier device, a transmission device which is arranged downstream of the switching unit and a filter device. In order to reduce the sensitivity of the switched-mode power supply to high-energy interferences, it is proposed that the filter device contains a current-compensated choke coil which is connected to a voltage limiter circuit in such a way that in the case of interference signals applied to the choke coil, a damping of the interference signals takes place by way of the voltage limiter circuit.

The disclosure is directed to a method for supplying power to a DC load using an energy conversion system that includes first and second rectifiers and a transformer system. Each of the rectifiers contains an AC-DC converter connected to an AC grid via a separate secondary side of the transformer system. The transformer system provides a first AC voltage having a first voltage amplitude .Math..sub.1 on the first secondary side and a second AC voltage having a second voltage amplitude .Math..sub.2 on the second secondary side, wherein a value of the second voltage amplitude .Math..sub.2 exceeds a corresponding value of the first voltage amplitude .Math..sub.1. The method includes operating the first rectifier with a first non-zero power flow P.sub.1 to supply power to the DC load when an input voltage U.sub.DC,load at the input of the DC load falls below a voltage threshold value U.sub.TH: wherein a second power flow P.sub.2 through the second rectifier is suppressed, and operating the second rectifier with a second non-zero power flow P.sub.2 to supply power to the DC load when the input voltage U.sub.DC,load at the input of the DC load reaches or exceeds the voltage threshold value U.sub.TH. The application likewise discloses an energy conversion system for performing the method and an electrolysis system.

The disclosure is directed to a method for supplying power to a DC load using an energy conversion system that includes first and second rectifiers and a transformer system. Each of the rectifiers contains an AC-DC converter connected to an AC grid via a separate secondary side of the transformer system. The transformer system provides a first AC voltage having a first voltage amplitude .Math..sub.1 on the first secondary side and a second AC voltage having a second voltage amplitude .Math..sub.2 on the second secondary side, wherein a value of the second voltage amplitude .Math..sub.2 exceeds a corresponding value of the first voltage amplitude .Math..sub.1. The method includes operating the first rectifier with a first non-zero power flow P.sub.1 to supply power to the DC load when an input voltage U.sub.DC,load at the input of the DC load falls below a voltage threshold value U.sub.TH: wherein a second power flow P.sub.2 through the second rectifier is suppressed, and operating the second rectifier with a second non-zero power flow P.sub.2 to supply power to the DC load when the input voltage U.sub.DC,load at the input of the DC load reaches or exceeds the voltage threshold value U.sub.TH. The application likewise discloses an energy conversion system for performing the method and an electrolysis system.

The Uninterruptible Timed Electromagnetic Locking mechanism consists of a rechargeable DC battery pack wired in parallel downstream of the power supply, a logic circuit including a programmable timer relay which when activated by a switch, engages the lock for a user-set amount of time regardless of future switch states, and an electromagnetic lock controlled by the logic circuit and programmable timer relay.

The Uninterruptible Timed Electromagnetic Locking mechanism consists of a rechargeable DC battery pack wired in parallel downstream of the power supply, a logic circuit including a programmable timer relay which when activated by a switch, engages the lock for a user-set amount of time regardless of future switch states, and an electromagnetic lock controlled by the logic circuit and programmable timer relay.

A power supply device includes a transformer including a primary winding, a secondary winding and an auxiliary winding, first, second and third circuits, and a switch. The first circuit in which a first capacitor and a first rectifier are connected in series is connected to the primary winding in parallel. The switch of which one end is connected to one end of the primary winding. The second circuit in which the auxiliary winding and a second rectifier are connected in serial is connected between a connecting point, to which the first capacitor and the first rectifier are connected, and the other end of the switch. The third circuit including a resistor and a third rectifier is connected to a gate of the switch. In the third circuit, a resistance value in a direction where a current flows into the gate of the switch is smaller than that in a direction where the current flows out of the gate.

In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.

In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.