Value-added exports by HS code

List of the catalog of this article:

• 1,How often is it better to change the car transformer
• 2、 What is the function of automobile transformers?
• 3, Automotive Transformer Standard Accurate
• 4, What's wrong with the on-board transformer burning when the electric vehicle is charging?

How often is it better to change the car transformer

It does not have a fixed replacement cycle, and there is no need to replace it as long as it works normally. Its service life is generally 100,000 kilometers or even longer. When the engine is running, there are often tens of thousands of volts of high-voltage pulse current on the high-voltage package. Due to long-term work in a high-temperature, dusty and vibrating environment, it is inevitable that it will age or even be damaged.

every 2 to 3 years. According to the information of Autohome, the Lingke on the transformer is a drop-type fuse, which mainly plays a role in protecting the safe operation of the circuit. In normal operation, the drop-type fuse will be affected by the moisture in the air and replace it every 2 to 3 years.

Car high-pressure package andIt is not a commonly used spare part. It has a fixed replacement cycle time. As long as everything is normal in work, it does not need to be disassembled and replaced. Its service life is generally 100,000 kilometers or even longer.

The national standard stipulates that transformers are designed according to a 20-year service life. In fact, most transformers in operation often exceed this service life. In actual use, it is eliminated in advance by industry regulations according to the operation situation. For example, a batch of aluminum coil thin insulated transformers produced around 1976 will be eliminated in advance by the state.

Usually, under normal circumstances, the durability of this kind of transformer can reach more than 20 years. However, in fact, the service life of the transformer is affected by many factors, such as operating temperature, oxidation degree, grounding and voltage resistance between windings, etc.

What is the function of automobile transformers?

The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. Introduction to electric vehicle transformer: Electric vehicle transformer Electric vehicle uses not a transformer, but a booster, which is to lower the voltage of the battery to direct current. Upgrade to the level that can drive the motor.

Voltage conversion: The output voltage of the fuel cell is converted through the DC/DC converter and then provided to the motor driver. ( 2) Stable voltage: The output voltage of the fuel cell is unstable, and the voltage is stabilized through the closed-loop control system of the DC/DC converter.

The transformer can not only achieve electrical isolation, but also play the role of voltage regulation. A fixed original edge coil number of rounds, and the secondary edge changes the number of rounds to obtain different voltage levels.The input of the transformer is a pulsed rectangular wave obtained through the inverter of the left full-bridge circuit, which is transmitted to the secondary side of the transformer, and another AC sine wave of the voltage amplitude is obtained.

The rotary transformer mainly has the following two functions: 1 speed sensing function; 2 position sensing function, adjusting the standard zero position of the motor and sensing the position of the motor rotor at any time.

The function of the transformer is as follows: to ensure the safety of electricity and meet the needs of various electrical teams. Use transformers to reduce the high voltage. The transformer also has the function of changing the current. The transformer also has the function of changing the impedance.

If there is no transformer, whether it is the electricity from the car generator or the electricity from the battery, their voltage is very low, only tens of volts, while the normal ignition of the spark plug requires tens of thousands of volts or even hundreds of thousands of volts.The transformer in the ignition system is configured to meet this need.

Automotive transformer standard

The voltage is 14 or 15 volts, and the capacity is 100VA or 150VA, which The sample charging current is from 5A to 10A. 5A current is used for slow charging, and 10A current is used for fast charging. Generally, 100VA is fine for home use.If it is dry maintenance, 150VA can be used for emergency fast charging.

The current of the car is generally large when it starts, and the truck may be bigger. It should be calculated at about 2-3 hundred ang. If it is a single transformer rectification, it may take 4-6KW.

The transformer outputs alternating current, and the battery stores direct current. The alternating current output by the transformer must be rectified into direct current before the battery can be charged. AC charging DC battery cannot be charged directly. The DC voltage after rectification is not less than 7V to charge the 6V battery. The charging voltage must be greater than the battery voltage to charge.

What's wrong with the on-board transformer burning when the electric vehicle is charging?

The transformer is short-circuited, the temperature is high, and the current is high, resulting in the burnout of the enameled wire.

It should be when the cigarette lighter was plugged in, the positive and negative poles were connected and the circuit was short-circuited. It is recommended to plug in the charger or navigation plug every time the engine is turned off, and then start the car again. Do not plug and unplug in the charging state. Note: The car charger uses the car cigarette lighter as a power socket to directly charge the mobile phone.

The charging fire of electric vehicles is basically caused by the short circuit of the charger. It is natural to advocate that friends must not use poor-quality chargers. When charging, there is no need to put the charger in a humid environment, otherwise it is easy to affect the short circuit of the charger. Electric vehicles are a simple travel tool.

Caused by the bearing, the bearing carries the rolling speed. Once the steel ball clearance increases, it will cause the internal sweep of the motor, the stator to rub the rotor, the effort to heat up, the friction force increases, and the temperature will rise.Solution: Replace high-quality bearings. Caused by stator deformation.

Electric vehicle charger failure 1. The DC voltage output is too high. Maintenance method: You can disconnect the overvoltage protection circuit so that the overvoltage protection circuit does not work, and then measure the main voltage of the power supply at the moment of startup. If the measured value is more than 1V higher than the normal value, it means that the reason for the high output voltage is indeed in the control loop.