At present, the switched reluctance motor (srm) has been put into practical use, the electric car developed by the French f1at and China

The electric bus developed by the Second Automobile Works have switched reluctance motor. srm is not any form of Rotor

Body and a permanent magnet brushless motor, the stator pole and rotor pole are convex. Srm focus fixed

Stator windings and pulsed current, the power converter can be a more reliable form of circuit topology. srm has a simple and reliable,

Efficient operation in a wide speed and torque range of flexible control can be four-quadrant operation, fast response, low cost, etc.

Advantages. But srm torque ripple, noise, you need the position detector, the system nonlinear characteristics and shortcomings, so

The application is restricted. Developed a permanent magnet switched reluctance motor drive system for the shortcomings of traditional srm

(Pmsrd), overcome by the introduction of high-performance permanent magnet steel, traditional srm converter is relatively slow, energy utilization

Lower shortcomings, an increase of motor power density.
2.4.2 Control Technology
  Srm system has obvious nonlinear characteristics of the system difficult to modeling, the linear control mode is not suitable for srm Department

Systems. The use of fuzzy logic control, neural network control. University of Hong Kong, the development of fuzzy sliding mode control has less

Less control of the oscillation, etc., a new breakthrough srm control study.
Scooter drive motor knot speed language
  Since the 1980s with the development of power electronics technology, the AC motor fold control becomes easier. For

This, the electric vehicle electric drive system from DC motor to the AC motor, especially induction motor has a tight structure

Compact, high reliability and low cost advantages for the electric car is especially valuable. Permanent magnet motor in addition to more than excellent

Points, also the conversion efficiency but also slightly better than the induction motor domain.
  Permanent magnet motor electric drive system with speed higher (the German kovo technology company has developed a speed up to 50000r/min

, The power of the brushless motor 1.5kw) magnetic province can achieve rotor light and compact, low-cost design is made

A hot topic of research and application. Permanent magnet motor is also made difficult to adjust the magnetic field to control the power factor and reactive power

The disadvantage, which will become the future research direction.
  The control device, a new generation of power electronic devices, enables the drive has a higher power density and efficiency of Results

The structure is also more solid, more suitable for electric vehicles.
  In the control strategy, variable structure control, fuzzy control, neural network control and expert systems, new control methods

Are increasingly used in electric vehicle drive system, and getting better results.
  Switched reluctance motor has a simple structure, flexible control, can the four-quadrant movement, high reliability in a wide speed

And the characteristics of the efficient operation of the torque range, as the electric drive system has the potential of the electric car and more attention. But its

Torque ripple, noise disadvantages such as has not been solved, and how the two aspects of motor design and control strategies to be

Improvement is a current research focus.

January 18, 2011, CCTV, CCTV network, organized by the China network television, network television car stations and

Hosted by the channel of the CCTV network of electric vehicles, \"Second China bicycles/">electric bicycle Industry Conference and electric vehicles in the 2010 Annual Award Presentation Ceremony

Held in Beijing. From the electric car industry experts, academics, business leaders, outstanding dealers, major media reporter

A total of more than 300 people attended the meeting. This meeting for the 2010 industry issues of concern were set up in the countryside policy

Slightly Forum \",\" Innovation and Development Forum \",\" brand dealers Forum, \"Marketing (brand), director of Forum\" four sub-

Forum. To the will actively participate in communication on issues of concern to experts, the scene was hot.
electric bicycles to the countryside as a top priority of the electric bicycle industry in 2010, successful self-tender of the ten provinces, industry

The corporate response to this country for the benefit of policy and actively participate in the provincial tendering exercise. Is well known, electric bicycles are included in the national home

Electricity to the countryside to the scope of subsidies, reflecting national recognition of the electric bicycle industry. However, due to encounter the prices of raw materials, to receive fill

Post cumbersome, outlets, imperfect, and other issues, so favorable policies to face the embarrassing situation of electric bicycles to the countryside.
Under the dual pressures of rising raw material prices and the loss of bargaining power of automobile companies, the countryside on more and more enterprises

Statement is tantamount to a tasteless passion of the countryside has fallen. In such cases, early December 2010, Jiangsu Province, on their own

Car electric car industry association dedicated organizational meeting discussed the impact of rising raw materials of the enterprise, and for the countryside products

To submit price adjustment apply to the local government departments, in order to reduce the impact of rising raw materials of the enterprise.
Not successful enterprises to support the grounds of appliances to the countryside manufacturers subsidies, policies to fight walking a fine line, so that successful enterprises

Facing an embarrassing situation in these provinces, and even individual enterprises reluctantly admits that wish to cancel their own successful qualification.
Third, in accordance with the requirements of the electric bike to the countryside policies, the purchase of the successful models of consumer needs for non-urban household agricultural

Village residents buy electric bicycles for sale cars store in the store login information to obtain the private network entry of home appliances to the countryside

Subsidy qualification. However, the dealer network access conditions in the urban stores, rural stores most of suspense

No network access. Rural consumers in the purchase of the successful models often need to go to the nearby city to buy. In addition, according to the line

Industry spending habits, many rural consumers in the purchase of electric bicycles, and distributors to bargain, but successful models must be strict

Grid in accordance with the bid price in the sale of the investment and the tendering process, with the spending habits of consumers to the left. These issues has also become a lot by

Sales factors of business troubles.