The use of electronic control units in automobiles is increasing, and data communication between electronic devices is becoming more and more. At the same time, the large-scale use of these separate modules increases the comfort of the vehicle and increases the cost and failure. The rate is rising, the wiring is complicated, and so on. Therefore, it is necessary to design a powerful control module to realize these discrete controller functions and control a large number of electrical appliances. This is BCM (B ODY CONTROL MODEL). At present, BCM is also a hot topic in automotive electronics research, and the competition is fierce.
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The research and application of BCM has greatly improved the performance of the whole vehicle. However, with the further development of automotive electronics technology, the functions of BCM integration are also increasing. The design of BCM has become more and more complicated. The centralized control also causes the wiring harness to be too concentrated, and the installation and wiring are also complicated.
BCM has the following development trend: more and more body electronics are applied in the body, which makes the BCM control more objects; the functions of each electronic device are more and more, and various functions need to be realized by BCM, which makes the BCM function more Powerful; more and more information sharing between electronic devices, one information can be used for many components at the same time, requiring BCM data communication functions to become stronger and stronger; a single centralized BCM is difficult to complete more and more functions, making Bus-based, networked BCM has become a development trend. The CAN bus is a serial multi-master controller LAN bus, which is a serial communication network that effectively supports distributed control or real-time control. Because of its high communication speed, good reliability and low price, it is especially suitable for automotive systems. Therefore, it is an inevitable trend of BCM development to control the body electrical and electronic devices by using CAN bus technology.
Bus-type body control system becomes an inevitable trend of BCM development
Based on the low-speed CAN bus, LIN and other automotive electronic network systems, the bus body control system has become an inevitable trend in the development of BCM. The following describes the bus type BCM in detail with the research conducted by Shanghai Tongde Electronic Engineering Technology Co., Ltd. on the bus type BCM.
The system has two buses, low speed CAN and LIN bus.
Low-speed CAN, information transmission rate is 100 Kbps, the control object of body system CAN is mainly low-speed motor, solenoid valve, lamp and switching device, etc. They have low requirements for real-time information transmission, but the number is large; low-speed CAN bus is adopted. It can also increase the transmission distance of the bus, improve the anti-interference ability, and reduce the hardware cost. LIN bus, information transmission rate is less than 20 Kbps, LIN bus is mainly used in low-speed systems that do not require CAN performance, bandwidth and complexity, such as switch-type load or position-based system control. Therefore, LIN is more conducive to the realization of the bus-type control system of the car and CAN network connection. The main front control module, main control module and rear control module are connected to the low-speed CAN bus; the main control module, the door control module, the central control lock module, the voice alarm module, etc. communicate through the LIN bus.
The system has the following advantages:
First of all, after adopting this mode, the system is very simple, the wiring harness is also very simple, the wiring is convenient, and the advantage of the bus is fully exerted.
Secondly, the function of BCM is shared by a small number of modules, and each module can have a very strong function:
1. For large inductive loads, such as wipers, blowers, fans, etc., in order to reduce the impact on the system power supply, while protecting the electrical equipment, the soft start can be implemented by PWM;
2. Short-circuit protection for electrical equipment. When a short-circuit fault occurs, cut off the power supply circuit in time to avoid accidents such as fire on the line;
3. Implement secondary power-on for short-circuit faults to further improve the system's anti-interference ability;
4. Diagnose, fault alarm, information record, etc. of equipment failure;
5. Complex functions are coordinated by each module.
Finally, information sharing is achieved to facilitate the use and development of new devices. In this system, almost all information is transmitted on the bus according to the protocol and is broadcasted, so the vehicle information can be easily obtained by the new device. Therefore, the CAN bus-based driving recorder and fault diagnostic tool only need to read the required signals from the bus according to the protocol, which makes product development easy and low in cost.
Dc Gear Motor can be defined as an extension of Dc Motor which already had its Insight details demystified here. A dc Gear Motor has a gear assembly attached to the motor. The speed of motor is counted in terms of rotations of the shaft per minute and is termed as RPM .The gear assembly helps in increasing the torque and reducing the speed. Using the correct combination of gears in a dc gear motor, its speed can be reduced to any desirable figure. This concept where gears reduce the speed of the vehicle but increase its torque is known as gear reduction.
Application field: usually used Electronic door locks, shutter motor, home audio equipment, sweep the floor machine robot
Features: dc gear motor drive precision, small volume, large torque, low noise, durability, low energy consumption, customized power design,easy installation, easy maintenance;Simplify design and save space.
Method of use: the best stable in horizontal plane, installed on the dc gear motor output shaft parts, cannot use a hammer to knock,knock prone to press into the dc gear motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Dc geared motors should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a geared motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Dc geared motors should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of dc gear motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
Dc Gear Motor
Dc Gear Motor,Gear Box Motor,Gear Reduction Motor,Small Diameter Dc Gear Motor
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