A fault detection method includes, at a generator module having a generator, a rectifier connected to the generator by phase leads, and an inverter connected to the rectifier by a direct current (DC) link, receiving a measurement of voltage applied to the rectifier by the phase leads and receiving a measurement of voltage applied to the inverter by the DC link. DC link voltage balance and sequence voltages are calculated using the measurement of voltage applied to the rectifier by the phase leads and the measurement of voltage applied to the inverter by the DC link. Determination is made using the DC link voltage balance and phase sequence voltages when no fault exists in the generator module. Determination is made that a fault condition exists using the DC link voltage balance and phase sequence voltages when a fault exists in the generator module. Generator modules are also described.

The structure and the testing device used for measuring the bonding strength of the light-emitting panel, including: a substrate, a flip chip film is disposed on the substrate, and a bonding portion of the flip chip film is bonded to the substrate. Wherein an orthographic projection of a non-bonding portion of the flip chip film on the substrate covers an orthographic projection of the bonding portion on the substrate, and the non-bonding portion is stretched to measure a bonding strength between the flip chip film and the substrate, thereby reducing the risk of breakage between the layers inside the substrate, thereby the bonding strength between the flip chip film and the substrate can be measured more accurately.

A fault detection method includes, at a generator module having a generator, a rectifier connected to the generator by phase leads, and an inverter connected to the rectifier by a direct current (DC) link, receiving a measurement of voltage applied to the rectifier by the phase leads and receiving a measurement of voltage applied to the inverter by the DC link. DC link voltage balance and sequence voltages are calculated using the measurement of voltage applied to the rectifier by the phase leads and the measurement of voltage applied to the inverter by the DC link. Determination is made using the DC link voltage balance and phase sequence voltages when no fault exists in the generator module. Determination is made that a fault condition exists using the DC link voltage balance and phase sequence voltages when a fault exists in the generator module. Generator modules are also described.

An exemplary embodiment of the present inventive concept provides a display device including: a display area where an image is displayed; a peripheral area disposed outside the display area; a hole area disposed within the display area; a hole crack detection line disposed adjacent to the hole area to surround the hole area and having a first end and a second end that is separated from the first end; a first detection line extending from the peripheral area and connected to the hole crack detection line to constitute a first closed circuit; a second detection line extending from the peripheral area and connected to the hole crack detection line to constitute a second closed circuit; and a circuit portion connected to the first detection line and the second detection line

An example electrical drain test device includes a battery interface system having electrical cables to connect in-line with a negative battery post of a battery and an electrical system under test without losing connectivity to test the electrical system under test without having to reset test or vehicle modules. The example electrical drain test device also includes a battery disconnect switch. The battery disconnect switch in a first position provides continuous electrical current between the battery and the electrical system. The battery disconnect switch in a second position electrically connects the electrical system under test to the battery through a test circuit to test the electrical system under test for parasitic drain. After an initial connection, the system under test remains in electrical connection with the battery regardless of switch position.

A method and apparatus for detection of a failure of a rectifier connected to a passive harmonic filter with a tuned circuit reactor, or of the filter itself, using low cost voltage sensing, modeling of reactor resistance and saturable inductance, and a mathematical integration. The harmonic spectrum of the rectifier current is used to determine an estimate of the rectifier impedance. A template of expected rectifier current is calculated, and compared against a rectifier current calculated on the basis of sensed voltages, to generate a difference signal. The difference signal is compared against a predetermined fault threshold to determine if an error has occurred. The apparatus includes a DSP obtaining the voltages of the source and load, and the tuned circuit reactor voltage, and configured to compare the currents calculated from the actual voltages with the currents in the template, and to thereby determine whether to annunciate a fault.

An inspection device comprises a stage for placing a device under test thereon, a dynamic characteristics test probe, a static characteristics test probe, and a control device configured to perform positional control by moving at least one of the stage, the dynamic characteristics test probe, and the static characteristics test probe. The control device performs the positional control such that the dynamic characteristics test probe is set to a dynamic characteristics test state in which the dynamic characteristics test probe is brought into contact with the electrode when the dynamic characteristics test is performed, and performs the positional control such that the static characteristics test probe is set to a static characteristics test state in which the static characteristics test probe is brought into contact with the electrode while the dynamic characteristics test probe is separated from the electrode when the static characteristics test is performed.

A method for determining an emission coefficient of a device under test (DUT) using a test circuit is disclosed. The method comprises coupling a parameter measurement circuit associated with the test circuit to an input pin associated with the DUT, wherein the input pin is coupled to a diode element within the DUT and performing voltage and current measurements associated with the input pin using the parameter measurement circuit. In some embodiments, the method further comprises determining a plurality of contact resistance values respectively based on the voltage and current measurements and an emission coefficient estimate using a contact resistance estimation circuit; and determining an emission coefficient associated with the DUT based on the determined plurality of contact resistance values using an emission coefficient determination circuit.

An optically-monitored and/or optically-controlled electronic device is described. The device includes at least one of a semiconductor transistor or a semiconductor diode. An optical detector is configured to detect light emitted by the at least one of the semiconductor transistor or the semiconductor diode during operation. A signal processor is configured to communicate with the optical detector to receive information regarding the light detected. The signal processor is further configured to provide information concerning at least one of an electrical current flowing in, a temperature of, or a condition of the at least one of the semiconductor transistor or the semiconductor diode during operation.

A system is disclosed to detect failure of a diode that is connected in series with a battery and a contactor or other switch configured to connect the battery to a load when the contactor or other switch is in a closed position and to isolate the battery from the load when the contactor or other switch is in an open position. In various embodiments, the system includes a high value resistor connected between the anode terminal of the diode and ground, the connection to the anode terminal being on a load side of the contactor or other switch; and a voltage meter configured to measure a voltage across the high value resistor at least during a test in which a voltage is applied to a bus associated with the load while the contactor or other switch is in the open position.