What is the normal voltage for car startup?
1 Answers
Car startup voltage is considered normal as long as it is not lower than 11V. Under normal circumstances, the battery voltage before starting the car is between 11.8V and 12.8V, and the battery voltage after starting is between 13.2V and 14.8V. Precautions for battery usage: Keep the battery clean and dry at all times, and ensure the vent holes are unobstructed. Do not use the starter continuously; each use should not exceed 5 seconds, with a rest period of 10 to 15 seconds between two startups. A fully charged battery should not be left in a state of insufficient charge for a long time; it should be charged regularly, otherwise it may lead to scrapping. The electrolyte level should be 10 to 15mm above the plates; if the level is too low, distilled water should be added promptly, not electrolyte. Consequences of motor voltage being too high or too low: Both excessively high or low voltage in the motor will cause overheating. When the motor operates at low voltage, both the speed and the impedance of the stator winding decrease. Since the reduction in voltage is less than the reduction in impedance, the current increases. Generally, the lower the voltage, the higher the current, the higher the temperature rise, and the greater the harm to the motor. If the motor operates at low voltage for a long time, measures should be taken to reduce the degree of harm. When the voltage drops by 10%, the motor output power should be reduced by 15%. The method to reduce output power depends on the working condition of the production machinery driven by the motor.
