A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

A control system for controlling operation of an execution device is provided. The control system includes a master controller, a microprocessor, and a signal line. The master controller is configured to send a control signal to the microprocessor via the signal line. The microprocessor is configured to send the control signal to the execution device to drive the execution device to operate, acquire, at a time interval, a feedback signal representing an operation state of the execution device, and send the feedback signal to the signal line. The master controller is further configured to acquire the feedback signal from the signal line, determine, from the feedback signal, the operation state of the execution device, and regulate the control signal based on the operation state.

A system for automatically commissioning a solar panel array comprises a plurality of panel monitoring devices, each panel monitoring device connected between a positive and negative terminal of a solar panel. Each panel monitoring device comprises a switching device, the switching device configurable to disconnect an output from the solar panel. The system further comprises logic configured to automatically obtain a relative position of each panel monitoring device in the system by appointing serially a series of masters from among the panel monitoring devices, each master in turn broadcasting a unique identifier and enabling its output. Each panel monitoring device listens to the masters' broadcasts and stores in memory the unique identifier and information indicating whether the panel monitoring device detected the masters' voltage. The panel monitoring devices determine their respective locations by analyzing the information broadcast by, and the voltage detected from, the masters.

The present application discloses a method, apparatus, device and medium for equalization control of battery packs. The method may include: acquiring a voltage of each of a plurality of cells of the battery pack; on the condition that one or more voltages of the voltages of the plurality of cells are within a preset voltage interval, selecting a target State of Charge (SOC)-Open Circuit Voltage (OCV) curve from a charging SOC-OCV curve and a discharging SOC-OCV curve stored for the battery pack based on the voltages within the preset voltage interval; acquiring a target SOC of each cell based on the target SOC-OCV curve and the voltage of each cell; calculating, for each cell, a SOC difference between the target SOC of the cell and a reference SOC; calculating an equalizing time for each cell based on the SOC difference of each cell.

A current monitoring circuit includes: an output terminal configured to be coupled to a controller; an inverter having an output coupled to the output terminal; a first transconductance amplifier having first and second inputs configured to be coupled across a sense resistive element, and an output coupled to an input of the inverter; and a current generator having a second transconductance amplifier configured to generate a reference current at an output of the current generator based on a reference voltage, the output of the current generator being coupled to the input of the inverter, where the output of the inverter is configured to be in a first state when a load current flowing through the sense resistive element is higher than a predetermined threshold, and in a second state when the load current is lower than the predetermined threshold, and where the predetermined threshold is based on the reference current.

An abnormality prompting method and an intelligent socket (30) are provided. Prompting is performed when a home appliance runs abnormally by means of the intelligent socket (30). The method includes: the intelligent socket (30) receives a state message from a first home appliance (S202), and the state message includes indication information used for indicating a current working mode of the first home appliance; the intelligent socket (30) obtains an actual value of a working parameter of the first home appliance (S203); the intelligent socket (30) determines a working state of the first home appliance according to the actual value of the working parameter and a maximum value of the working parameter allowed by the working mode (S204); when determining that the working state of the first home appliance is an abnormal state, the intelligent socket (30) outputs a prompt message (S205).

A grounding cable warning device includes a housing affixable to a grounding cable. An electrical current transformer is disposed within the housing. An energy storage component is disposed within the housing. A first sensor is disposed within the housing and configured to detect an electrical current in the grounding cable. A second sensor is disposed within the housing and configured to detect a voltage of the grounding cable. One or more electronic indication components are arranged with the housing and configured to alert a user of an unsafe condition. A microcontroller is disposed within the housing and receives input from the first sensor and the sensor and actuates the one or more electronic indication components, in response to receipt of the input, to alert the user of the unsafe condition.

A voltage supervisor includes a first transistor coupled between a first supply voltage and a second supply voltage. The voltage supervisor includes a second transistor coupled between the first supply voltage and the second supply voltage. The voltage supervisor is configured to provide a first current proportional to a difference in gate-to-source voltages of the first transistor and the second transistor. The voltage supervisor is also configured to provide a second current proportional to a difference in the first supply voltage and the difference in gate-to-source voltages of the first transistor and the second transistor. The voltage supervisor is configured to compare the first current to the second current to determine a voltage value that changes a state responsive to the first supply voltage crossing a threshold.

A system and approach for a self-calculating test of a heating, ventilation and air conditioning load. The test may be run upon meeting predetermined conditions. Thermostatic control of the load may be disabled when the load test starts. If a call for heat or cool is made at the thermostat, response to the call may be delayed until the load test is completed, and if AC power is lost during the test, the test may finish and allow detection of the phantom AC detection device with a loss of AC power. If a voltage of a storage capacitor falls below a battery boost threshold, the test may be cancelled to allow the phantom circuit charge the storage capacitor. The system and approach may incorporate load test states that include an initialize state, start test state, get baseline state, test measure state, stabilize measurement state, calculation state, and finalize results state.

A method and an apparatus for displaying information of a motor are provided. The method includes: acquiring a target category identifier of a target motor; determining a category parameter interface according to the target category identifier, and displaying the category parameter interface, wherein the category parameter interface displays a category parameter tag that prompts a user to enter parameter information corresponding to the category parameter tag; acquiring target parameter information entered by the user via the category parameter interface; and obtaining target display information corresponding to the target category identifier according to the target parameter information, and displaying the target display information.