The technical indicators of DC power supply can be divided into two categories: one is the characteristic indicators, reflecting the inherent characteristics of DC power supply, such as input voltage, output voltage, output current, output voltage regulation range; The other is the quality index, reflecting the advantages and disadvantages of DC regulated power supply, including stability, equivalent internal resistance (output resistance), ripple voltage and temperature coefficient.

In daily life, the current provided by the "battery" is direct current. Batteries are polar, divided into positive and negative electrodes. Dc power transmission is welcomed by the power sector for its advantages of large transmission capacity, good stability, flexible control and regulation, and will have further application prospects in China. In the process of the development of HVDC, we should pay attention to the research and application of light HVDC. The development of modern high voltage DC transmission technology has opened up a broad prospect for the efficient transmission of electric energy.

Dc regulated power supply is an electronic device that can provide a stable DC power supply for the load. Most DC regulated power supplies are AC power supplies. The DC output voltage of the regulated power supply remains stable even if the voltage or load resistance of the AC power supply changes. With the development of electronic equipment to the direction of high precision, high stability and high reliability, DC regulated voltage power supply puts forward high requirements for the power supply of electronic equipment.

In the power communication network, the most common faults of the communication power supply are as follows: ① battery short circuit fault. When a short circuit fault occurs inside the battery, the battery may burst. This is because the short circuit will damage the negative insulation layer of the battery pack and cause the power cable to overheat. ② The high-frequency switch is faulty. The more common fault phenomena are that the switching power indicator is not on; Work indicator is normal but no current output; The protection indicator blinks; IGBT module burst and so on.

With the rapid development of modern society, people have higher and higher requirements for the function, appearance and comfort of buildings, and the building itself is getting larger and larger and more complex. Therefore, there are higher and higher requirements for buildings to prevent fire, eliminate fire hazards, quickly evacuate personnel after fire, eliminate fire and reduce casualties and property losses. The realization of these requirements plays a vital role in the fire equipment, and the fire equipment power monitoring design is undoubtedly an important guarantee.

As a switching power supply input technical indicators are input power phase number, rated input voltage and voltage variation range, frequency input current and so on. The input power supply is generally single-phase 2-wire system and 3-phase 3-wire system, as well as single-phase 3-wire system and 3-phase 4-wire system.

With the integration and standardization of DC regulated power supply planning, its power density rises linearly, while the volume of DC regulated power supply is getting smaller and smaller. This makes the interference test of DC regulated power supply become important. The noise test of DC regulated power supply is mainly divided into three points: test conditions, test methods and output noise test.

Dc power supply is a device that maintains a constant voltage current in the circuit, and its function is to convert the AC voltage into a stable and suitable DC voltage. Dc power supply is mainly composed of power transformer, rectifier circuit, filter circuit and voltage regulator circuit

The electronic circuit needs DC power supply to provide energy when working, and the battery is generally only used in low-power portable instruments and equipment because of the high cost of use. This paper discusses how to convert AC power supply into DC power supply.

In many cases, if we need more power, and we can not immediately find enough power supply, we often first think of two or more power output series or parallel, to obtain higher voltage, current or power. In fact, many programmable power supplies can be set in series or parallel, but we must use the correct method.

With the increasing expansion of the battery industry, battery testing is also becoming more and more important. The battery simulator is a device that simulates the charge and discharge of real batteries, and conducts relevant experimental tests to shorten the product development and battery verification test time.

The output has voltage without current, or current without voltage In either case, the power supply is working normally, and the operator should check whether the load is in good contact, whether the load is short-circuited or open, whether the load meets the specifications, and so on. In extreme cases, if the power supply has a voltage output (constant voltage state), and the load line is broken, the natural output current is equal to zero. Similarly, if the power supply has a current output (constant current state), and the load is short-circuited, the natural output voltage is equal to zero.

1, according to the required voltage, first adjust the "coarse" knob, and then gradually adjust the "fine" knob, to achieve the correct coordination. For example, if you need to output 12V voltage, set the "coarse" knob to 15V, then adjust the "fine" knob to 12V, and the "coarse" knob should not be set to 10V. Otherwise, the maximum output voltage cannot reach 12V.

According to the needs of the industry, Varied introduced battery simulator power supplies to meet the market demand, and the VEADS series of power supplies were specially developed for the test and test of motor controllers, drive motors and complete vehicles in the new energy electric vehicle industry, which are low-cost solutions used to replace power batteries.

Dc regulated power supply is used in various fields such as electronics, electrical, industrial, scientific research and experiment, and its types and specifications are countless. Choosing a suitable DC power supply is indeed a headache. Wanruida has been focusing on high-quality power supply manufacturing for 15 years, and the following Wanruida Electric will explain to you how to choose a DC power supply that is suitable for your business.

Dc power supply is needed in daily life, DC power supply is divided into programmable DC power supply. Programmable DC power supply is to use the circuit to control the switch tube for high-speed turn-on and cut-off, the direct current is converted into high frequency alternating current to provide the transformer for transformer, thus generating the required group or group of voltages. So how does a programmable DC power supply work? Vareda will take you through it

Voltage regulation power supply is an electronic device that can supply stable AC or DC power to the load, including AC voltage regulation power supply and DC voltage regulation power supply.

Dc power supply mainly includes input grid filter, input rectifier filter, converter, output rectifier filter, control circuit, protection circuit.

Recently, Suzhou Wanruida participated in the 4th International Hydrogen Energy and Fuel Cell Technology and Products Exhibition held in Foshan, the exhibition Wanruida achieved a complete success.

A few days ago, Jiangsu Province issued the "Notice on the issuance of opinions on Promoting the high-quality development of the New energy Automobile Industry" (hereinafter referred to as the "Notice"), the plan is to 2021, the province's new energy vehicle output of more than 300,000, but also proposed to speed up the layout of the fuel cell vehicle industry.