Abstract: The present application is directed to an electrical system including a housing configured to hold electrical components within an internal volume. In one aspect the electrical system is a power transformer. A sensor is mounted to the housing and is configured to sense a parameter associated with one or more electrical components during operation of the electrical system. A control system including a communication unit and a data processing unit is operable for analyzing the sensed parameter and comparing the sensed parameter to a predetermined minimum or maximum threshold value.

Abstract: Asymmetric AC to DC autotransformer for turboelectric propulsion, and associated systems and methods are described herein. In one embodiment, an asymmetric AC to DC autotransformer includes: a first coil, a second coil and a third coil of a delta winding Each coil is energized at its corresponding input phase. A first plurality of correction windings coupled to the first coil, a second plurality of correction windings coupled to the second coil, and a third plurality of correction windings coupled to the third coil. A bridge rectifier having a plurality of rectifiers is coupled to respective individual correction windings. Phases of the individual correction windings are asymmetric such that individual phase voltages are controlled relative to the opposite input phase. Voltages are unbalanced relative to neutral.

Abstract: A switched-capacitor converter has a first and second terminal; a switched-capacitor ladder network having a plurality of serially connected first capacitors defining a plurality of flying capacitor nodes; a plurality of serially connected second capacitors defining a plurality of output capacitor nodes, wherein nodes of the flying capacitor nodes can be connected to nodes of the output capacitor nodes in a plurality of ladder converter configurations to perform a switched-capacitor ladder power conversion; and a switch matrix to connect the first terminal to different flying capacitor nodes and/or to connect any flying capacitor node to any other flying capacitor node or output capacitor node according to different switch configurations. Also, a switched-capacitor converter assembly may have a plurality of serially and/or parallel connected switched-capacitor reconfigurable switched-capacitor ladder converters.

Abstract: Various embodiments relate to a voltage converter including a control unit configured for operating in a hysteretic control mode. A control unit may be configured to receive a PWM signal, a duty cycle signal, at least one reference voltage, a factor of an output voltage of the voltage converter, and a factor of an input voltage of the voltage converter. The control unit may also be configured to compare the at least one reference voltage to the factor of the output voltage and the factor of the input voltage. Further, the control unit may be configured to generate a first control signal mirroring the PWM signal in response to at least one of: the factor of the input voltage being greater than the at least one reference voltage and the factor of the output voltage being greater than the at least one reference voltage.

Abstract: An electronic device and a method of a power supply protection for a connection port are provided. The electronic device includes a first connection port with a first switch and a first controller and a first control circuit. The first controller determines a first preset value according to a state of the first switch activation signal correspondingly, and detects whether the first input voltage of the first connection port is greater than the first preset value. When the first input voltage is greater than the first preset value, the first controller enables a first abnormal signal on the first abnormal state detection pin. In response to a first forced closing signal being enabled, the first controller controls the first switch to disconnect both terminals.

Abstract: A power supply comprises a transformer having a primary winding and a secondary winding, a bridge circuit coupled to the primary winding of the transformer, a first rail coupled to the secondary winding of the transformer, and a second rail coupled to the secondary winding of the transformer. The bridge circuit comprises a plurality of switches. The power supply also comprises a first sensor assembly coupled to generate a first error signal representing a difference between currents in the first rail and the second rail. A controller is configured to alter a duty cycle of a first switch of the plurality of switches relative to a duty cycle of a second switch of the plurality of switches based on the first error signal.

Abstract: This disclosure relates to monitoring operational parameters of a distribution transformer and an associated surge arrester, and methods of retrofitting the distribution transformer with a transformer parameter monitoring (TPM) system. The TPM system can include a plurality of sensors. A subset of the plurality of sensors can be configured to monitor one or more physical properties of a distribution transformer, and another subset of the plurality of sensors can be configured to monitor a surge arrester associated with the distribution transformer. The TPM system can further include a controller that can be configured to receive captured sensor data from the plurality of sensors, and a communications interface that can be configured to communicate the captured sensor data to a remote system for evaluation thereof to determine one or more operational parameters of the distribution transformer and an amount of deterioration of the surge arrester.

Abstract: The present document relates to a power converter configured to convert an input voltage at an input of the power converter into an output voltage at an output of the power converter. The power converter may comprise a power stage, a voltage controlled voltage source VCVS, a first feedback path and a second feedback path. The power stage may be coupled to the output of the power converter. The VCVS may be configured to generate, at an output of the VCVS, an error voltage by comparing a reference voltage with a feedback voltage indicative of the output voltage. The first feedback path may extend from the output of the power converter, via the VCVS, via the power stage, to the output of the power converter. The second feedback path may extend from the output of the VCVS to the output of the power converter.

Abstract: Embodiments include systems for regulating windings in a power supply. Aspects include a transformer comprising a first primary winding and a first secondary winding, a DC to DC converter, a saturable reactor coupled to an output of the first secondary winding and an input to the DC to DC converter, and a controlled current source coupled to a node between the saturable reactor and the input of the DC to DC converter, wherein the controlled current source is configured to provide a current rate based on an output voltage of the DC to DC converter, wherein a first filter inductor of the DC to DC converter is magnetically coupled to a second filter inductor of a second DC to DC converter.

Abstract: A voltage regulator includes a main driving stage circuit, a first pre-driving circuit, a plurality of auxiliary driving stage circuits, a second pre-driving circuit, and a comparison and decoding circuit. The main driving stage circuit provides a main driving current of an output voltage according to a first control signal. Each of the auxiliary driving stage circuits determines whether to provide an auxiliary driving current of the output voltage according to a second control signal. The second pre-driving circuit generates the second control signal according to an enable signal. The comparison and decoding circuit generates a simulated driving current and generates a load current according to a reference current and a counting code, compares the simulated driving current with the load current to generate a comparison result, and generates the enable signal by decoding the comparison result. The counting code is generated according to the comparison result.

Abstract: A power-factor corrected AC/DC converter has three half-bridge legs, electrically coupled with each other in parallel, each leg having a pair of switches. Each switch of the pair is electrically coupled to the other in series via a respective node that is electrically coupled through an inductor to an AC line. The converter has a fourth half-bridge leg electrically coupled with the other legs to form an electrically parallel circuit. The fourth leg has a pair of switches electrically coupled to each other in series via a fourth node, which is selectively electrically coupleable to a neutral or a second AC line. The converter has a controller that operates the three legs as a 3-channel interleaved AC/DC boost converter and couples the fourth node to the neutral or second AC line if the input is single-phase, and as a 3-phase AC/DC boost converter if the input is three-phase.

Abstract: A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.

Abstract: A standby power system for a flyback converter is disclosed. The flyback converter includes a primary-side, a secondary-side, an output terminal at the secondary-side, and a secondary-side controller, where the output terminal is configured to electrically connect to a load. The standby power system comprises a comparator at the secondary-side, an opto-coupler in signal communication with the primary-side, the secondary-side, and the comparator, and a cable detach detector (or load detector). The cable detach detector is configured to determine whether a device is electrically connected to the flyback converter through a charging cable and to set the flyback converter into a standby mode if the deice is disconnected from the charging cable.

Abstract: An activation circuit which can realize both of area reduction and current consumption reduction by more preferred embodiments. The activation circuit has an N-type MOS transistor having a gate terminal connected to a ground and having a threshold voltage in a vicinity of 0 V and a resistor interposed between a source terminal of the MOS transistor and a ground, wherein an electric potential of a drain terminal of the MOS transistor is controlled depending on a first signal output from a device serving as a drive target, and transmission of a second signal for activating the device is controlled depending on the electric potential of the drain terminal.

Abstract: The disclosure provides a starting circuit of a switching power supply, which includes an input rectifying and filtering circuit, a starting circuit, a transformer, an output rectifying and filtering circuit, a feedback circuit, a first photoelectric coupler and a power management chip. The power management chip is respectively connected with the output end of the first photoelectric coupler, the output end of the feedback circuit and the primary coil of the transformer. After the first photoelectric coupler is powered on, the starting circuit is turned on, and the power management chip and the transformer are started and work. After the first photoelectric coupler is powered off, the power management chip stops working and enters a standby state. And at the moment, the standby power consumption of the power management chip is equal to zero.

Abstract: Provided is a reference voltage circuit including a first MOS transistor to a sixth MOS transistor, a first resistor and a second resistor, a current source circuit, and an output terminal. Five of the transistors form a differential transconductance amplifier, and an input transistor of the differential transconductance amplifier operates in the manner of weak inversion operation.

Abstract: The present invention relates to a mechanical operating assembly for a bistable relay and a bistable relay assembly. The mechanical operating assembly comprises: an actuating mechanism mounted to a bracket, including an actuating member and a first transmitting member which is connected to a paddle, the actuating member is movable between an initial position in which the actuating member is not in contact with the first transmitting member and an actuating position, when the actuating member moves from the initial position to the actuating position, the actuating member contacts the first transmitting member; a reset mechanism mounted to the bracket, including a reset member and a second transmitting member which is in contact with the first transmitting member, the reset member is movable between an initial position and a reset position, the reset member contacts the second transmitting member when moving from the initial position to the reset position.

Abstract: The present invention discloses a power converter, a switch control circuit, and a short circuit detection method for current sensing resistor of the power converter. The power converter includes: a transformer, a power switch, a current sensing resistor and a switch control unit. The current sensing resistor has one end coupled to the power switch and another end coupled to ground. The switch control unit generates the operation signal to control the power switch. The switch control unit generates a first sample-and-hold voltage at a first time point and a second sample-and-hold voltage at a second time point according to a voltage across the current sensing resistor. When a voltage difference between the first sample-and-hold voltage and the second sample-and-hold voltage is smaller than a reference voltage, it is determined that a short circuit occurs in the current sensing resistor.

Abstract: An insulated power supply circuit includes a power input circuit including a switching control circuit and a switching element connected to a corresponding winding of a transformer, and power output circuits of two systems each including a regulator connected to a corresponding winding. By the control circuit controlling ON/OFF of the switching element in accordance with an output condition change command signal, which is generated based on a load condition at an output destination of each regulator, a voltage corresponding to an estimated value of a preset excitation level is generated, to thereby change the excitation level of the winding. Each regulator receives an output voltage generated in a corresponding winding in response to the change in excitation level.

Abstract: A power supply system includes: a first power circuit having a first battery, a second power circuit having a second battery, a voltage converter which converter voltage between the first power circuit and second power circuit, a current sensor which acquires a passing current value Iact of the voltage converter, a passing power control unit which operates the voltage converter, and a failure determination unit which determines failure of the voltage converter. The failure determination unit determines that the voltage converter has failed in a case of the passing current value Iact becoming negative in a state in which the passing power control unit is not operating the high-arm element of the voltage converter to ON, and makes a time from when the passing current value Iact first became negative until determining that the voltage converter failed shorter as the passing current value Iact increases to the negative side.