How to deal with the failure of the electric drive system

Faults in the power system can be divided into two types: simple faults and compound faults.

1) Simple fault refers to the occurrence of a horizontal (i.e., short circuit) fault or longitudinal (i.e., disconnection) fault somewhere in the power system, including three-phase short circuit, single-phase grounding short circuit, two-phase short circuit, two-phase grounding short circuit, single-phase disconnection, two-phase disconnection and other faults.

2) Compound fault refers to the combination of two or more simple faults that occur in the power system.

1.Failure analysis content: the nature of the fault, the cause of the fault, the development process of the fault, the process of dealing with the fault, the loss of the fault, the responsibility analysis of the fault, the experience and lessons that should be learned, the improvement measures, etc.

2.It also involves transient stability analysis and dynamic stability analysis of power systems. Discuss whether the power system can be restored to stability after being disturbed. The analysis of the changes in the current and voltage of the power system under various fault conditions is only part of the content.

3.There are also changes in current and voltage in various fault situations. For example, when a single phase grounding short circuit is generated on a certain line, how big the positive sequence, negative sequence, zero sequence current and voltage are at the time of short circuit, and how to attenuate.

Power transmission is an important part of the power system, and in recent years, due to the acceleration of infrastructure construction and the need for safe power supply, buried power cables are increasingly in the power facilities of urban and rural areas and industrial and mining enterprises.

Summary. 1. Check whether the power supply voltage is normal, and the power supply needs to be replaced if the power supply voltage is abnormal; 2. Check whether the control circuit board is burned, and if it is burned, it needs to be replaced with a new control circuit board; 3. Check whether there is an unknown fault in the motor, and if there is an unknown fault, a new motor needs to be replaced; 4. Check whether the transmission parts are worn and leaked, and if there is wear and oil leakage, new transmission parts need to be replaced; 5. Check whether there is improper operation of the control system, and re-set the parameters if there is improper operation; 6. Check whether there are other hardware or software failures, if there are other hardware or software failures that need to be overhauled.

Hello, 1. Check whether the power supply voltage is normal, and the power supply voltage needs to be replaced if the power supply voltage is abnormal; 2. Check whether the control circuit board is burned, and if it is burned, it needs to be replaced with a new control circuit board; 3. Check whether there is an unknown fault in the motor, and if there is an unknown fault, a new motor needs to be replaced; 4. Check whether the transmission parts are worn and leaked, and if there is wear and oil leakage, new transmission parts need to be replaced; 5. Check whether there is improper operation of the control system, such as improper operation, and the parameters need to be reset to open randomly; 6. Check whether there are other hardware or software failures, if there are other hardware or software failures that need to be overhauled.

Won't start. Dear, if you can't start, please check from the following points. 1. Check the power supply:

Check whether the power supply is normal, if there is a short circuit, damage, then replace the power supply mold. 2. Check the control circuit: check whether the circuit is normal, if there is a short circuit or damage, replace the circuit.

3. Check the drive: check whether the drive is normal, if not, replace the drive. 4. Check the power cord:

Check the power cord for damage, and if it does, replace the power cord. 5. Check the software: check whether the software is normal, if there is a problem, reinstall the software or update the software carefully.

Displays driver failures.

What model of M3 car.

Karry Yoyo EV

Dear dear, there may be multiple reasons for electric drive failure, which need to be detected and analyzed in order to find out the cause of the failure. One is that it may be a motor failure, when there is a failure, you can check whether there are burned coils, damaged ball bearings, damaged filters, etc. inside the motor, if the above situation exists, the motor needs to be repaired or replaced. Second, it may be a battery pack failure, you can check whether the battery pack is a friend leak whether there is a short circuit, open circuit, leakage, etc., if the above conditions exist, the battery pack needs to be repaired or replaced.

The third is that it may be the circuit fault of the controller or other systems, you can check whether the circuit of the controller has damaged components, open circuits, short circuits, etc., if the above conditions are good, the circuit of the controller or other systems needs to be repaired or replaced.

You can troubleshoot.

The failure of the electric drive system is very serious.

The electric drive system includes an electric motor, a motor controller and a transmission mechanism. Some electric cars.

The wheels can be driven directly by the electric motor. The electric drive mode of electric vehicles can basically be divided into two types: electric motor drive and electric wheel drive.

Main content: It consists of an electric motor, a fixed speed ratio reducer.

and differentials and other orange fingers composed of electric motor ** drive slow motion system, this drive system, because there is no clutch and transmission.

As a result, the volume and mass of the mechanical drive can be reduced.

Another electric motor drive system, which is similar to the layout of the fuel steam circle of the front-wheel drive transverse pinning engine, integrates the motor, the fixed speed ratio reducer and the differential, and connects the two half-shafts to the two drive wheels, which is the most commonly used in small electric vehicles.

The electric motor and the fixed ratio star gear reducer rotate in the wheels and have no propeller shaft.

and differentials, thus simplifying the drivetrain. However, the electric wheel drive mode requires two or four electric motors, and its control circuit is also relatively complex, which is widely used in ZTE electric vehicles.

Hello, the failure of the motor drive system is mainly divided into motor failure and electric trouser controller failure. The electric motor is a key component that converts electrical energy and mechanical energy to realize the drive of the vehicle, and is a typical electromechanical hybrid. There are many factors involved in motor failure, such as circuit system, magnetic circuit system, insulation system, simple mechanical system and ventilation and heat dissipation system.

Any system that does not work well or does not cooperate well with each other will lead to motor failure, so motor failure is more complex than the failure of other equipment, and the motor fault diagnosis involves a wider range of technologies. In addition, the operation of the motor is also related to its load situation and environmental factors. The motor operates in different states and exhibits different fault states, which further increases the difficulty of motor fault diagnosis.

Generally speaking, the failure of an electric motor can be divided into mechanical failure and electrical failure. The main mechanical faults are stator core damage, rotor core damage, bearing damage and shaft damage, the cause of the failure is wear, indentation, corrosion, electric erosion and cracking caused by vibration, insufficient lubrication, excessive speed, excessive static load, overheating, etc.; The electrical faults are mainly stator winding faults and rotor winding faults, and the causes of faults include motor winding grounding, short circuit, open circuit, poor contact and broken squirrel cage. Because of the structural and physical characteristics of the devices themselves and the electromagnetic compatibility between them, the failure of the motor controller has also become the main cause of the failure of the motor drive system.

The faults of the motor controller mainly include the following categories: IGBT fault, input power line and ground wire fault, rectifier diode short circuit, DC bus grounding error, DC side capacitor short circuit, thyristor short circuit, temperature overrun alarm, phase current overcurrent, overvoltage and undervoltage and other high-voltage electrical system faults. Dear, your likes are important to me, and your affirmations are my motivation.

Summary. 1.Check whether there are oil stains on the surface of the drive motor and whether there is leakage2

Check the upper and lower pipes of the drive motor for cracks and leaks3Visually inspect the protective layer of the underbody and check whether the drive motor is bumped or damaged. 4.

To check the stator winding of the drive motor, it is necessary to judge whether there is a short circuit between the three-phase AC stator windings, and use a multimeter to measure whether the resistance values of the stator windings of the drive motor between you and V, between V and W, and between W and U are normal.

Hello dear, glad for your question. Cause of failure:1The power is not on2Inverter control reason 3Stator winding faults (open circuit, short circuit, grounding and dry connection error) 4The power supply voltage is too low and lacking.

Workaround:1Check the switch, contact fluid retarder contact and electric alarm mold machine to dismantle the lead wire, and repair 2Check the inverter 3Check the stator windings, find faults and fix 4Check the mains voltage and each connection.

What about the maintenance of the drive motor control system of new energy vehicles?

1.Check whether there are oil stains on the surface of the drive motor and whether there is leakage2Check the upper and lower pipes of the drive motor for cracks and leaks3

Visually inspect the protective layer of the underbody and check whether the drive motor is bumped or damaged. 4.To check the stator beam winding of the driving electric slag start, it is necessary to judge whether there is a short circuit between the three-phase AC stator windings, and use a multimeter to measure whether the resistance value of the stator winding of the driving motor between you and v, between v and w, and between w and u is normal.