Single phase motor with gearbox
The rotor and stator core structure of single-phase motor is the same as that of three-phase motor, but its winding distribution is different. The winding of single-phase motor is divided into two windings: one is called main winding (also known as working winding) and the other is called auxiliary winding (also known as starting winding); The wire diameter and number of turns of the two windings are different. The wire diameter of the main winding is generally larger than that of the auxiliary winding, and the number of turns is slightly less. The coil group of single-phase motor mostly adopts concentric distribution, but its winding adopts more sine wave winding, that is, the turns of large coil and small coil of the same magnetic pole group are different from each other. According to the connection mode between single-phase motor and capacitor, single-phase motor can be divided into three types: capacitor operation type, capacitor starting type and capacitor operation and starting type (double capacitor motor).
1、 The capacitor operated motor is connected in series with a capacitor on the secondary winding, and then connected in parallel with the main winding. Because the capacitor participates in the common work of the main winding no matter whether the motor is working or starting, it is called the capacitor operated motor.
2、 The capacitor starting motor is connected in series with a capacitor and a centrifugal switch on the auxiliary winding, and then connected in parallel with the main winding. The capacitor passes through when the motor is started. When the motor speed reaches about 70% of its rated speed, due to the centrifugal force generated by the rotor during operation, the centrifugal switch is disconnected, the power supply through the capacitor is cut off, and the main winding works alone, Therefore, this kind of motor is called capacitor starting motor.
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Single phase motor with gearbox
Motor is a device that converts energy into machinery. It converts energy into machinery. It is mainly composed of - a stator winding, which is used to generate a magnetic field, or an electromagnet winding or rotor distributed in a stator group. The wire coil is used to generate the rotating magnetic field, and the magnetic power rotating torque is generated in the rotor. Under the action of current, the magnetic field is generated to make the motor rotate.
Single phase machine refers to the asynchronous motor provided by 220 V AC power supply.
Structure of single-phase motor
Single phase motor is mainly composed of end cover, stator, rotor, power wiring, casing and bearing.
The motor stator consists of three parts: stator core, stator winding, and paired DC excitation main magnetic poles are installed on the base. The main function of the stator is to generate rotating magnetic field, which is cut off by the power line to generate output current. The motor includes two parts: rotor part and stator. They are electric energy conversion equipment used to realize rotor part and mechanical parts.
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Single phase motor with gearbox
At present, the mainstream automatic transmissions in the automotive market are divided into four categories: AMT (mechanical automatic transmission), at (automatic transmission), CVT (continuously variable transmission) and DCT (double clutch transmission). Among them, in the selection of CVT and DCT, Japanese car enterprises represented by Nissan and Toyota and German car enterprises represented by Volkswagen and Audi have differentiated.
Up to now, Toyota has a large number of models equipped with CVT around the world, and more than 100 models equipped with CVT in 2013 One million vehicles have been produced, and localization production has been realized in the Chinese market for the first time; Nissan's models are widely equipped with CVT and continue to carry out technical transformation in order to achieve better handling and fuel economy. But at the same time, Audi recently announced that it would no longer use CVT in the future and focus on DCT (internally known as DSG).
Nissan improved CVT transmission introduces d-step shift mode
According to the report of American Automobile News in early August, Nissan plans to make software changes to give CVT (continuously variable automatic transmission) a driving feeling close to at.
CVT abandons the oil consuming hydraulic transmission device of traditional automatic transmission and has the advantages of fuel saving. However, due to the lack of fixed gear, "downshifting and speed-up" and other skills are useless, resulting in a decline in the sense of operation.
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Single phase motor with gearbox
To this end, Nissan introduced the d-step shift mode, so that "CVT is no longer like CVT" during driving. In d-step In shift mode, CVT brings the shift feeling of traditional automatic transmission to the driver, but in fact, it does not shift according to the progression. Nissan adjusts the transmission according to the change of vehicle speed earlier than the speed ratio under the condition of 4000rpm speed through software change, creating a similar shift experience.
D-step shift mode will be used for 2015 versa, versa note, sentra (North American sunshine), altima (North American Teana) V-6, Pathfinder and quest. Previously, the shift mode has been first used in altima of 2013 four cylinder engine and rogue of 2014
Toyota s-cvt is specially designed for the Chinese market and can simulate 8-speed gear shifting
On July 30, Toyota Motor (Changshu) Parts Co., Ltd. (hereinafter referred to as tmcap) opened in Changshu, Jiangsu Province. The factory officially began to produce s-cvt gearbox mounted on the new generation corolla and leiling vehicles. The transmission put into production in China this time is the third generation CVT product of Toyota, with higher and new technology.
The new generation of s-cvt is specially developed and adjusted for the needs of Chinese consumers and China's road environment, This s-cvt is a product "specially designed for the Chinese market". S in the s-cvt represents "smart", "super" and "Sport", which highlights the intelligent characteristics of the CVT and can provide drivers with arbitrary driving experience. The s-cvt can simulate 8-speed gear shifting and can meet the needs of Chinese consumers to "achieve low fuel consumption" and "pursue vehicle driving fun".
In addition to the two key models of the new corolla and leiling, this domestic s-cvt gearbox will be equipped on a total of six models of Toyota's ELFA, yizhi, RAV4 and previa in the future. In addition, tmcap will also produce transaxles for Toyota hybrid vehicles in the future.
Audi plans to abandon CVT continuously variable transmission and focus on 7-speed DSG
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Single phase motor with gearbox
Foreign media autoevolution reported in the next sentence in July that Audi will no longer carry CVT transmission for its new models, and will focus on the development of 7-speed DSG dual clutch transmission in the future. At present, Audi has stopped the research and development work related to CVT transmission, and plans to launch a new 7-speed dual clutch transmission next year and first assemble it on the new generation Audi A4 model.
In Audi and its parent company Volkswagen, DCT is called "direct shift gearbox" (DSG) CVT is called "multitronic".
● engineers from Audi PLAAF said that the fuel economy of the CVT model could not be improved, but that it would not help Audi PLAAF improve the vehicle's fuel economy. CVT transmission needs to continuously adjust the transmission stage with the increase of engine speed. In the past, this kind of transmission was famous for "seamless" shift, but now DSG can achieve similar characteristics. The reason why Audi used CVT before is that it is conducive to fuel economy, but now the new generation of progressive gearbox has better performance.
The technical paths of German DCT against Japanese CVT are different
At present, Japanese automakers, including Toyota, Honda and Nissan, prefer CVT, while German automakers represented by Volkswagen prefer DCT
CVT has more advantages in improving engine efficiency, but DCT is better in improving transmission efficiency. The technical paths chosen by both sides are not - the same, so it is difficult to say which is better or worse.
According to Toyota technical experts, vehicles with low engine torque are more suitable for carrying CVT, which can give full play to engine performance; But beyond this area, DCT is more appropriate.
However, both transmissions also have their own shortcomings. For example, in terms of the feeling of use, while CVT realizes the smoothness, it may also bring consumers the feeling of "meat" and insufficient power. However, the smoothness of DCT shift is obviously not as "senseless" as CVT, and the sense of frustration will be more obvious.
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