A power conversion circuit having a solid-state circuit breaker integrated therein is disclosed. With a disconnect switch between a utility source and the power conversion apparatus described for meeting UL489, the power conversion circuit includes an input connectable to an AC source, a rectifier circuit connected to the input to convert an AC power input to a DC power, and a DC link coupled to the rectifier circuit to receive the DC power therefrom. The rectifier circuit comprises a plurality of phase legs each including thereon an upper switching unit and a lower switching unit, wherein at least one of the upper and lower switching units on each phase leg comprises a bi-directional switching unit that selectively controls current and withstands voltage in both directions, so as to provide a circuit breaking capability that selectively interrupts current flow through the rectifier circuit, while maintaining original power conversion functionalities.

The present disclosure provides an image device. The image device may include a camera lens, one or more stepper motors to drive the camera lens, one or more H-bridge circuits configured to control at least one of the one or more stepper motors, and a lens-identification circuit connected with the one or more H-bridge circuits, wherein the lens-identification circuit includes an impedance network of which an impedance value corresponds to a type of the camera lens.

The present disclosure provides a motor drive circuit. The motor drive circuit includes a first-phase half bridge circuit and a second-phase half bridge circuit. The first and second phase half bridge circuits include first-phase and second-phase high-side FETs and first-phase and second-phase low-side FETs. The first-phase and second-phase high-side FETs are configured to apply a first voltage to a first end. A second end of the first-phase and second-phase high-side FETs is connected to the first end. A second voltage lower than the first voltage is applied to the second end. The first-phase low-side FET or the second-phase high-side FET is disposed between the first-phase high-side FET and the second-phase low-side FET. The second-phase low-side FET or the first-phase high-side FET is disposed between the first-phase low-side FET and the second-phase high-side FET.

Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.

Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.

The present disclosure relates to a driving apparatus for a reclosing apparatus and a driving method thereof. The driving apparatus comprises a first energy storage unit, a timing unit, a control unit, and a first power supply unit, a second energy storage unit and a driving unit. The timing unit outputs a first enable signal; the control unit outputs a second enable signal or a third enable signal; the first power supply unit enables the second energy storage unit to receive the power when receiving the second enable signal, and enables the second energy storage unit to discharge when receiving the third enable signal; the second energy storage unit receives and stores the power via the first power supply unit; and the driving unit provides the power stored in the first energy storage unit to the reclosing apparatus when a predetermined condition is satisfied.

A method is disclosed providing ground fault circuit interruption protection for a pump motor which includes determining a current difference between at least two leads located on a load side of an electromechanical device, wherein the electromechanical device is configured to mechanically drive a road, and wherein the method further comprises interrupting a flow of current in response to the current difference exceeding a threshold current difference.

An electronic device is downsized while suppressing performance degradation of the electronic device. In the electronic device, a power module including a power transistor is arranged in a first region on a back surface of a through hole board having a plurality of through hole vias having different sizes while a pre-driver including a control circuit is arranged in a second region on a front surface of the board. In this case, in a plan view, the first region and the second region have an overlapping region. The power module and the pre-driver are electrically connected to each other via a through hole via. The plurality of through hole vias include a through hole via having a first size, a through hole via which is larger than the first size and in which a cable can be inserted, and a through hole via in which a conductive member is embedded.

A system includes a converter for powering a synchronous electric machine to which it is connected by cables, an insulating device and a mechanism for short-circuiting phases of the machine. The system includes primary detectors for detecting an overcurrent in the converter and a securing device able to open the insulating device when receiving a primary detection signal emitted by the primary detector. The system also includes secondary detectors able to detect a short-circuit downstream from the insulating device and to emit a secondary detection signal toward the securing device, the latter actuating the closing of the mechanism for short-circuiting as long as they have already received a primary detection signal having led to the opening of the insulating device.

An example welding-type system includes: processing circuitry; and a machine readable storage medium comprising a machine readable instruction, when executed by the processing circuitry, cause the processing circuitry to: control a first switch to disconnect a motor circuit from a motor power source, the motor circuit comprising a wire feed motor and a second switch; control the second switch to permit current to flow while the first switch disconnects the motor circuit from the motor power source during a test period; and in response to feedback indicative of a current through the motor circuit while the first switch is open and the second switch is closed, detecting a fault condition associated with the motor circuit.