bldc motor classification by purpose
bldc motor-use classification: bldc motor controller and bldc motor driver. bldc motor drive with divided: power tools (including drilling, polishing, grinding, grooving, cutting, reaming and other tools) with bldc motor, household appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders , DVD players, vacuum cleaners, cameras, hair dryers, electric razors, etc.) with bldc motor and other general-purpose small mechanical equipment (including a variety of small tools, small machinery, medical equipment, electronic equipment, etc.) with bldc motor.
Controlling bldc motor can be divided into: Stepping bldc motor and servo bldc motor and so on.
Wednesday, August 31, 2011
Friday, August 26, 2011
Wednesday, August 24, 2011
Non-motor vehicle bike conversion kit
SHENZHEN, June 7 (Xinhua reporter Wu dream up) 6, Shenzhen formally implemented in the main urban electric bike conversion on the road against the policy. Reporters under Part 6 in Shenzhen, the forbidden line region did not find driving electric bike conversion.
According to the Shenzhen Municipal Public Security Bureau on May 26 issued a "ban on roads in some areas of electric bike conversion kit installed in power plants and other non-motor vehicle a notice," from June 6 to December 5, Shenzhen prohibited from entering the electric bike conversion kit Futian, Luohu and Yantian, Nanshan, Baoan and other major urban areas.
Traffic police department said the traffic police department before July 1 electric vehicle found in violation will be advised based, on July 1 will officially start penalties on illegal riding will be $ 200, will be temporarily detained vehicles such as refuse to pay a fine.
Previously, Shenzhen Traffic Police Bureau official said, and electric vehicle-related accidents are more impact on road safety and traffic efficiency is the main reason for the forbidden line of electric vehicles. According to statistics, in 2010, Shenzhen traffic accidents involving electric vehicles 268, resulting in 64 deaths.
Some analysts believe that, due to electric bike kit is the express delivery company in the end the main means of transport used to restrict the electric car will greatly enhance the delivery of Shenzhen logistics enterprises and part of the self-built e-commerce businesses operating costs. Electric bike kit in Shenzhen City, amounted to more than 50 million units to maintain.
According to the Shenzhen Municipal Public Security Bureau on May 26 issued a "ban on roads in some areas of electric bike conversion kit installed in power plants and other non-motor vehicle a notice," from June 6 to December 5, Shenzhen prohibited from entering the electric bike conversion kit Futian, Luohu and Yantian, Nanshan, Baoan and other major urban areas.
Traffic police department said the traffic police department before July 1 electric vehicle found in violation will be advised based, on July 1 will officially start penalties on illegal riding will be $ 200, will be temporarily detained vehicles such as refuse to pay a fine.
Previously, Shenzhen Traffic Police Bureau official said, and electric vehicle-related accidents are more impact on road safety and traffic efficiency is the main reason for the forbidden line of electric vehicles. According to statistics, in 2010, Shenzhen traffic accidents involving electric vehicles 268, resulting in 64 deaths.
Some analysts believe that, due to electric bike kit is the express delivery company in the end the main means of transport used to restrict the electric car will greatly enhance the delivery of Shenzhen logistics enterprises and part of the self-built e-commerce businesses operating costs. Electric bike kit in Shenzhen City, amounted to more than 50 million units to maintain.
Saturday, August 20, 2011
Background and Structure of Brushless Motor
In recent years, brushless motor as the rapid development of the field in the model as a driving force. As the output and price reasons, the past few years, brushless motor to use more air in the high-end model, since the rapid development of machining technology, brushless motor production costs of many, and it is currently entering the field at all levels of the model, From electric cars to electric remote control boat remote control to the electric model airplanes, everywhere.
Misunderstanding of the brushless motor
Many people have seen the model with brushless hub motor, they are used in battery-powered, so a lot of people in knowledge, there have been such a misunderstanding, that the brushless motor is a DC motor, it is not true, brushless motors are AC motors , is a three-phase AC permanent magnet motor, brushless motor 3 input model conductor current is AC, but this is not 50HZ AC mains sine wave, but from the brushless motor controller (commonly known as brushless ESC) out of the three-phase modulation becomes rectangular wave frequency is much higher than 50HZ, and with the motor speed change.
Brushless Motor Structural Analysis
Structure, brushless motors and brush motors are similar, there are rotor and stator, but the structure of the brush motor and the opposite; brush motor switch is the coil windings, and power output shaft is connected to the stator is a permanent magnet steel; brushless permanent magnet motor rotor is, together with housing and output shaft connected to the stator windings is to remove the brush motor is used to alternate the electric field for the brush, so called brushless motor (Brushless motor), I now have a problem, not the electromagnetic field of transformation, how to make brushless motor it?
Misunderstanding of the brushless motor
Many people have seen the model with brushless hub motor, they are used in battery-powered, so a lot of people in knowledge, there have been such a misunderstanding, that the brushless motor is a DC motor, it is not true, brushless motors are AC motors , is a three-phase AC permanent magnet motor, brushless motor 3 input model conductor current is AC, but this is not 50HZ AC mains sine wave, but from the brushless motor controller (commonly known as brushless ESC) out of the three-phase modulation becomes rectangular wave frequency is much higher than 50HZ, and with the motor speed change.
Brushless Motor Structural Analysis
Structure, brushless motors and brush motors are similar, there are rotor and stator, but the structure of the brush motor and the opposite; brush motor switch is the coil windings, and power output shaft is connected to the stator is a permanent magnet steel; brushless permanent magnet motor rotor is, together with housing and output shaft connected to the stator windings is to remove the brush motor is used to alternate the electric field for the brush, so called brushless motor (Brushless motor), I now have a problem, not the electromagnetic field of transformation, how to make brushless motor it?
Wednesday, August 17, 2011
ordinary electric bike conversion
With the development of society, the progress of time, for the convenience of modern life and the pursuit of the growing green fashion, personalization, means of transport the bicycle to motorcycle to car change more rapidly. However, the popular means of transport for bicycles and motorcycles by the limitations of the great challenges from electric tricycle, convenient, safe and comfortable, low energy consumption, pollution-free, low-cost, efficient, practical and stylish electric tricycle gradually changed the way people way of life. According to industry statistics, the domestic market demand for electric cars 80% of the annual rate of growth. Experts pointed out that the "electric tricycle with small size, low price and convenient, fast, comfortable, etc., in use does not produce exhaust pollution, spent around $ 1500 can buy the means of transport, that is stylish and practical." purchase and use of electric tricycle will become a new consumption trend.
However, the current 1,500 yuan on the market for the vast number of electric tricycle low-income are that 450 million bicycle owners, want to have a fashion personality electric tricycle is still elusive, love "black" is can not and "House"! Therefore, the cost of an ordinary electric bike conversion of the successful launch, no doubt to meet the public demand for cyclists, and also for the investors in this project a huge market opportunity. Leafmotor bicycle conversion electric car based on this distribution center is a huge potential market-oriented, launched a low-cost ordinary electric bike conversion project. Modification or renovation of the old bike a new bike directly into a fashion personality to install electric tricycle, only to spend several hundred dollars, enough to satisfy the public demand for cyclists, ordinary people achieve the dream of fashion.The center will be based in good faith, the supremacy of the principle of reciprocity, "quality win, reputation-based", we sincerely welcome customers to visit us.
Tuesday, August 16, 2011
Sunday, August 14, 2011
DC-DC converter is the core of Brushless motor
DC-DC converter is the core of Brushless motor
220V AC voltage is rectified and filtered DC voltage to be 320V or so, add to the power module input. Single DC-DC module maximum output voltage is generally +48 V, +60 V DC to get the output voltage, the method must be used module in series. Design uses two PH600S280-28 DC-DC module (to +30 V output) through the series to get +60 V output voltage, fast recovery diodes D1, D2 is the protection devices in series, requiring D1, D2 reverse voltage greater than twice the rated output voltage power supply, power supply rated current greater than twice the output current, the forward voltage drop should be as small as possible. Because it is in series with two power supply module power supply system, in a limited package to complete the design will be difficult, and some program using two modules in series to complete the design package, namely the design of two separate 30V power supply, then an external series constitute the +60 V power supply system. Design through the rational allocation of space, power up and down in the lid of each installation of a DC-DC module to heat the metal shell as a means of compact design and installation of technology to the entire power system packaged in a smaller space, so that the whole power supply size, weight greatly reduced cross-sectional area of only 6 × 9 inch 2, to achieve a small size high-power integrated power system design.
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