Superconductors are conductors that have zero resistance and complete flux repulsion effects at a certain temperature. This characteristic sets them apart from all other conductive materials in that they do not lose energy or heat when current flows through them. If superconductors are used to make transformers, generators, motors, current limiters, and energy storage systems, efficient power grids and motors can be realized. Superconducting magnets made from superconducting coils can be used in magnetic resonance imaging and artificially controlled nuclear fusion and other fields. The antimagnetic properties of superconductors also make them an option for magnetic levitation trains.

In the new energy industry, the output of batteries and photovoltaic solar panels is DC, and the energy storage and power generation systems composed of them have a high proportion of DC power supply systems.

"Charging for 5 minutes, talking for two hours" is known to almost everyone, but how does the voltage and current of the battery of the mobile phone change within five minutes of charging the mobile phone, and how much electricity is charged to the battery within five minutes? Smart home appliances such as washing machines and refrigerators, what is the current change and power consumption in different function modes and when they are in standby? These questions actually just use a power meter will allow us to see the process and results clearly!

Background Semiconductor manufacturers have extremely high requirements on power supply, in particular the wafer related industry with higher requirements on power supply quality. Once voltage transient drop occurs, it will not only cause unexpected damage to sensitive microcomputer automatic control devices but also interrupt the process and cause great losses. To protect sensitive devices from voltage transient drop damage, the SEMI F47 standard stipulates the tolerance level of the semiconductor processing equipment on voltage transient drop, and requires that the semiconductor processing equipment should be immune to voltage transient drop in the AC power grid.

What is a starter motor ? A starter (also self-starter, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power. Starters can be electric, pneumatic, or hydraulic. The starter motor can effectively reduce manpower requirements, and is more rapid and reusable. It is often used in the start of automobile engines and the start of large construction machinery.

Background In electromagnetism, when the current passes through the conductor perpendicular to the direction of the external magnetic field, there is a potential difference between the two sides of the conductor perpendicular to the magnetic field and current direction.