A method and system for diagnosing a squib loop in a restraint control module using a transient response is disclosed in the present application. The system may be used with a low energy actuator (LEA) which is primarily an inductive device. A diagnostic current may be applied to the squib loop for a diagnostic test period and the voltage between the feed line terminal and the return line terminal or the voltage between the return line terminal and the feed line terminal can be monitored at a specific time or times during the test period for the expected response (e.g. peak voltage, rise rate, etc). The current may also be reversed to check the correct polarity of a diode in the LEA.

A method and system for diagnosing a squib loop in a restraint control module using a transient response is disclosed in the present application. The system may be used with a low energy actuator (LEA) which is primarily an inductive device. A diagnostic current may be applied to the squib loop for a diagnostic test period and the voltage between the feed line terminal and the return line terminal or the voltage between the return line terminal and the feed line terminal can be monitored at a specific time or times during the test period for the expected response (e.g. peak voltage, rise rate, etc). The current may also be reversed to check the correct polarity of a diode in the LEA.

An envelope detector comprises a first differential transistor pair that receives first and second input signals, a second differential transistor pair that receives third and fourth input signals, a resistor, a current source, and a comparator. The first and second differential pairs each comprise two transistors having first current terminals coupled together and second current terminals coupled together. The resistor is coupled between the second current terminals of the first and second differential pairs. The current source has a first terminal coupled to the second terminal of the resistor and to second current terminals of the second differential pair and a second terminal configured to receive a negative supply voltage. The comparator has a negative input coupled to first current terminals of the first differential pair and a positive input coupled to first current terminals of the second differential pair.

An information processing apparatus includes an extraction unit, a determination unit, a display control unit, and a display unit. The extraction unit is configured to extract, by predetermined pattern matching, candidate peaks in a certain arbitrary period of time from among at least one or more pieces of waveform data. The determination unit is configured to determine, from among the candidate peaks of the waveform data, a single peak based on a score related to the pattern matching. The display control unit is configured to output display information for displaying a position of the peak. The display unit is configured to display the display information.

The present disclosure provides a method for detecting an electrical discharge in an electrical apparatus. The method includes sensing an electromagnetic wave using an electrical sensor and generating an electric signal for a predetermined time period, sensing an acoustic wave using an acoustic sensor and generating an acoustic signal for the predetermined time period. The acoustic sensor is associated with at least one compartment of the electrical apparatus. Electrical data is generated based on a quasi-periodic characteristic of electric peak sequences of the electrical signal. Acoustic data is generated based on a quasi-periodic characteristic of acoustic peak sequences of the acoustic signal, wherein the electrical data is combined with the acoustic data to provide an operation status of the at least one compartment.

Disclosed are a current-sampling method, a chip, and a sampling apparatus for a phase current of a motor. The sampling method includes: identifying whether a waveform of a current period falls at a boundary of a sector region where a phase current of at least one phase is unable to be collected; determining a first duty cycle and a transforming channel mode for a channel of the at least one phase; storing the first duty cycle and the transforming channel mode in a buffer, and enabling a direct memory access (DMA) mode to the buffer at the same time; transforming a part of the waveform of the current period by configuring the channel of the at least one phase with the first duty cycle and the transforming channel mode; and acquiring the phase current of the at least one phase based on a transformed waveform of the current period.

Disclosed are a current-sampling method, a chip, and a sampling apparatus for a phase current of a motor. The sampling method includes: identifying whether a waveform of a current period falls at a boundary of a sector region where a phase current of at least one phase is unable to be collected; determining a first duty cycle and a transforming channel mode for a channel of the at least one phase; storing the first duty cycle and the transforming channel mode in a buffer, and enabling a direct memory access (DMA) mode to the buffer at the same time; transforming a part of the waveform of the current period by configuring the channel of the at least one phase with the first duty cycle and the transforming channel mode; and acquiring the phase current of the at least one phase based on a transformed waveform of the current period.

A protection circuit and method for protecting driven circuitry against voltage peaks in a radio frequency signal, “V.sub.RF”, past a predetermined voltage level “V.sub.detect”. The protection circuit includes an input for receiving the radio frequency signal. The protection circuit also includes at least one amplification stage coupled to the input. The amplification stage is operable to produce an amplified signal based on V.sub.detect−V.sub.RF. The protection circuit further includes a hold circuit operable to determine, from the amplified signal produced by the amplification stage, whether a peak voltage V.sub.peak of the radio frequency signal exceeds V.sub.detect. The hold circuit is operable to output a first detection value if V.sub.peak exceeds V.sub.detect. The hold circuit is operable to output a second detection value if V.sub.peak does not exceed V.sub.detect. The protection circuit also includes a latch circuit operable to latch the detection value outputted by the hold circuit.

Examples of operating an Intelligent Electronic Device (IED) during power swings, are described. In an example, voltage measurements for a phase is received and sampled. Root mean square (RMS) values of the voltage samples is calculated based on the voltage measurements. Delta quantities for each phase are calculated based on the RMS values. Each of the RMS values and delta quantities are associated with respective sampling instants. In response to a delta quantity being greater than a predefined threshold, a peak delta quantity is detected. A time interval between a sampling instant associated with the peak delta quantity and a sampling instant associated with a first delta quantity is determined. Based on a comparison of the time interval with a threshold time, a disturbance condition may be detected as a power swing and consequently, fault detection at the IED may be blocked.

A power conversion apparatus includes a power conversion circuit configured to convert DC power into three-phase AC power; and a control device configured to generate a two-phase negative-phase current from a three-phase AC current output from the power conversion circuit, and to detect an open phase on an output side of the power conversion circuit based on a magnitude of an amplitude of the two-phase negative-phase current. The control device may be configured to determine an occurrence of the open phase when the magnitude of the amplitude of the two-phase negative-phase current increases, and an electric current of at least one phase of the three-phase AC current decreases.