What Causes Insufficient Power Generation in a Car Alternator?

1 Answers
StevenLee
07/24/25 2:50am
"Too high or too low no-load voltage can cause insufficient power generation in a car alternator. Too high no-load voltage: Automatic voltage regulator malfunction. Excessive current in the no-load exciter field winding. Inspect the automatic voltage regulator; reset if the voltage setting is too high. Too low no-load voltage: Exciter field winding open circuit. Check if the exciter field winding resistance is infinite. Replace the broken winding or reconnect the circuit; severe short circuit in the main generator field winding. Excessive current in the exciter field winding. The main generator field winding overheats significantly, vibration increases, and the DC resistance of the field winding is much lower than normal."
Was this review help?
11
4
Share
More Forum Discussions

How is the reliability and durability of the Haval H9?

The reliability and durability of the Haval H9 are quite good, with basically no major issues, but the fuel consumption is relatively high. In terms of power: The new 2.0T gasoline twin-scroll high-power engine delivers a maximum power of 165KW and a maximum torque of 385N-m (1800-3600rpm), utilizing technologies such as direct fuel injection, twin-scroll turbocharger, dual VVT, and dual side-mounted balance shafts. In terms of configuration: It is equipped with full-speed ACC adaptive cruise control, 4-level distance adjustment for automatic following, supports following function on curves with a radius >125 meters; features stop-and-go function and the ability to follow from a standstill; and performs well in harsh weather conditions such as rain, snow, and fog.
2
4
Share

What is the top speed of the Honda AX-1 250 motorcycle?

Honda AX-1 250 motorcycle has a top speed of 250 kilometers per hour. Conditions to achieve top speed: Suitable road surface, the vehicle needs to be shifted into overdrive gear. For example, for a 5-speed car, some vehicles have 4th gear as overdrive, while others have 5th gear as overdrive. After shifting into overdrive, press the throttle to the maximum. Theoretically, when the "engine speed" reaches the "maximum power corresponding speed", the vehicle will achieve its top speed. Meaning of top speed: Refers to the maximum driving speed that a vehicle can achieve under windless conditions on a level, good-quality asphalt or concrete road surface. The top speed provided here is data from the manufacturer, for reference only, and does not represent PCauto's actual test data.
7
0
Share

How to eliminate the tire pressure warning in Magotan?

To eliminate the tire pressure warning in Magotan, follow these steps: 1. After the tire pressure warning light comes on, start the vehicle and long-press the button with an exclamation mark in brackets on the center console to eliminate the warning; 2. Alternatively, after turning on the ignition, hold down the reset switch near the gear lever to eliminate the warning. Reasons for the tire pressure warning light to illuminate include: 1. A punctured tire causing the tire pressure monitoring light to come on: The usual solution is to adjust the front tire pressure to 2.3 and the rear tire pressure to 2.4, then clear the tire pressure alarm. Drive the vehicle for 3-4 days; if the alarm does not reappear, there is no issue. If it does, there may be a puncture, requiring a visit to a 4S shop for inspection. 2. Excessive tire pressure causing the monitoring light to illuminate: A tire pressure between 2.2~2.5 BAR is safe. However, in summer, high temperatures can cause the tire pressure to rise beyond the normal range during driving. Therefore, in summer, it is advisable to maintain a lower tire pressure within the normal range, around 2.2 BAR, while in autumn and winter, it can be adjusted to the higher limit of 2.5. 3. Prolonged driving with low tire pressure causing the monitoring light to come on: This usually occurs when a tire's pressure is too low, leading to increased tire temperature and pressure during high-speed driving. In such cases, stop and rest or replace the spare tire promptly. 4. Low tire pressure due to prolonged lack of inflation causing the monitoring light to illuminate: When the pressure drops below 1.8, the tire pressure monitoring light will come on. Regularly check to ensure the tire pressure monitor is functioning correctly. If the tire pressure monitor fails to alert in time when an issue arises, it may indicate a problem with the monitor itself.
3
2
Share

What Causes the Steering Wheel Noise in Mercedes-Benz S320?

Mercedes-Benz S320 steering wheel noise causes and corresponding solutions: Aging of tie rods: Aging of the tie rod ends can cause play in the tie rods, leading to steering wheel noise. Solution: Replace the tie rod ends, but remember to perform a wheel alignment after replacement. Steering gear failure: If there is noise when turning the steering wheel and the steering feel is noticeably uneven, it may be due to excessive wear of the steering gear meshing gears causing excessive clearance. Solution: Replace the steering gear. Aging of power steering belt: Improper tension or aging of the power steering belt. Solution: For mechanically hydraulically assisted steering wheels, if the drive belt tension is improper or the belt is aged, it will cause noise. Adjust or replace the belt.
16
2
Share

What is the reason why the charging cover of Geely New Energy cannot be opened?

It is very likely that the charging cover of Geely New Energy cannot be opened because it is frozen due to low temperature. You can use a hair dryer to blow the charging cover, then add some antifreeze, and insert a waste card from the gap at the bottom of the outer cover of the charging cover to open it. Meaning of Geely brand logo: The new logo of Geely Auto brand continues the design concept of six gemstones in the brand 3.0 era, with the extended universe as the design origin, integrating silver starlight, deep space gray and earth blue, showing Geely Auto's upgrade from the blue sky and earth in the brand 3.0 era to the pursuit of the vast universe. Models under the brand: Geely Auto has a range of models covering various segments such as sedans, SUVs, and MPVs, including Xingyue L, Xingrui, Xingyue S, Borui, Boyue series, Haoyue, Jiaji, Emgrand series, Vision series, etc., encompassing traditional fuel, hybrid, plug-in hybrid, and pure electric power systems.
11
0
Share

What Does Car Maintenance Mean?

Car maintenance has two meanings: one refers to the upkeep of a car, and the other refers to the costs associated with owning a car. Below is a detailed introduction about car maintenance: 1. Overview: Car maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of a car, also known as car servicing. Currently, car maintenance mainly includes the engine system, transmission system, air conditioning system, cooling system, fuel system, power steering system, etc. 2. Purpose: The goal of car maintenance is to keep the car clean, ensure normal technical conditions, eliminate potential hazards, prevent faults, slow down the deterioration process, and extend the service life.
7
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.