Iron resonant AC voltage regulated power supply: the AC voltage regulated device with constant volt-ampere characteristics is composed of saturated choke coil and corresponding capacitor. Magnetic saturation type is the typical structure of this kind of regulator in the early stage. It has the advantages of simple structure, convenient manufacture, wide input voltage range, reliable operation, strong overload capacity and so on.

Excellent AC frequency conversion power supply has what characteristics. Good speed regulation stability and high efficiency. At low speed, the characteristic static shut-off rate is higher and the relative stability is good.

It is well known that in the programmable DC power supply circuit, there are elements called parasitic elements, drift elements, such as "resistance, capacitance, induction, etc., specially designed by the designer".

Multifunctional portable chargers usually need to provide a stable DC power supply to meet the needs of various portable electronic devices. In order to improve the power density of the DC voltage regulator, the following methods can be considered

High-frequency DC power supplies, as the name suggests, are products that provide direct current power for electronic devices. Currently dc power is mainly used in power plants and substations to provide power for control loads, power loads and DC accident lighting loads.

High power constant current source is a kind of wide spectrum, high precision, low harmonic distortion of the constant current source, mainly used for testing the thermal relay, molded case circuit breaker, small short circuit breaker and you need to set up the rated current, current, short circuit protection, current, and other fields, can be applied to low resistance load.

The duty cycle of flyback switching power supply is mainly determined by the input voltage and withstand voltage of switching power supply tube. When the input voltage changes, the duty cycle also changes. For example, when the input voltage is AC260V and the switching tube voltage is 650V, the duty cycle is 0.306

When AC power supplies measure high speed pulses with rise times and pulse widths of nanoseconds, it is necessary to prepare an AC power oscilloscope with a large band width and a large number of samples.

The programmable DC power supply has three programming functions, step and gradient, which can be applied to a variety of test requirements. However, some engineers are used to using PC software, or some special testing requirements require a connection to the PC.

Under normal conditions, it is necessary to select the appropriate working mode according to the AC power supply test content. In the test of AC power supply, dc power supply, battery, DC-DC converter, etc., it is necessary to have a "virtual load" corresponding to the actual load (circuit) that consumes current.