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2020-08-20

Are electric vehicles and new energy vehicles the same concept?

Definition of 1. Electric Vehicle According to the national standard "GB/T 19596 Electric Vehicle Terminology", electric vehicles refer to the general term of hybrid vehicles, pure electric vehicles and fuel cell vehicles. Are electric vehicles and new energy vehicles the same concept?

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2020-08-20

New energy vehicle motor industry chain motor, electric control

At present, electric vehicles on the market are mainly equipped with AC induction motors and permanent magnet motors. The former is widely used in Europe and the United States and is characterized by low cost, but small speed range and low efficiency. The latter is favored by Japanese cars and has improved speed range and efficiency. However, it is necessary to use expensive rare earth permanent magnet material NdFeB. Japan is short of resources. In the face of rising rare earth prices, Japan is developing switched reluctance motors with potential, this kind of motor is not lost to the permanent magnet motor in performance, and it is important to get rid of the dependence on rare earths.

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2019-12-18

Motor Core Subdivision Description

1. Automotive motor core (application: window lift motor, seat position motor, fan motor, starter motor, EPS power steering motor, etc.)

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Introduction of generator rotor

The motor rotor is divided into two types: inner rotor rotation mode and outer rotor rotation mode. The rotation mode of the inner rotor is that the core body in the middle of the motor is a rotating body, which outputs torque (refers to the motor) or income energy (refers to the generator).

18

2019/12

Causes and Maintenance of Motor Rotor Core Failure

The rotor is made of mutually insulated silicon steel sheets, which is part of the magnetic circuit of the motor. The main reasons for the failure of the stator and rotor cores are as follows:(1) The bearing has been used for a long time and excessive wear, causing the stator and rotor to rub against each other, causing damage to the surface of the core, thus causing short circuit between silicon steel sheets, increasing the iron loss of the motor, and causing the temperature rise of the motor to be too high. At this time, fine files and other tools should be used to remove burrs, eliminate the short circuit of silicon steel sheets, coat insulating paint, and dry. (2) When removing the old winding, the force is too large, so that the reverse groove is tilted outward. At this time, needle-nose pliers, wooden hammer and other tools should be used to trim, so that the tooth groove is reset, and it is not easy to reset.

21

2018/12

Three-phase motor stator winding and its end-to-end discrimination

1. three-phase motor stator winding three-phase motor has three stator windings, each winding has two leads, a total of six leads. The two outgoing lines of each winding can be found by measuring the on-off with a multimeter. 2. three-phase motor stator winding head and tail end discrimination in the three-phase motor each winding two lead wire to determine the case, can further distinguish the three winding lead wire head and tail. Measurement method 1: (1) multimeter selection: DC 50μ (II) measurement process: 1. Connect one lead wire of each winding of the three windings of the motor together, and the remaining three lead wires (one for each winding) are also connected together. Make it this way

21

2018/12

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