The current is inverted into 220 AC power to supply power to the motor.
The type of battery used in the system is a valve-controlled sealed maintenance-free lead-acid battery.
It adapts to a wide range of ambient temperatures, long service life, safety and explosion protection, and good deep discharge recovery performance.
In order to extend battery life, constant voltage current limiting charging is used here. Optional L pressure value. The aspect must satisfy the amount of electricity charged under the squat to compensate for the self-discharge. The NP-type battery requires a charging voltage of 2.252.3V. The system uses a regulated floating charge charging method. When the mountain is 1 ,, the transformer is lost! The double 14 voltage is passed through and is rectified and filtered. Then, after 7915 regulation, the output of the regulator is 15, after two poles are reduced to 136, connected to the negative terminal of the battery, charging the battery = at this time, the charging voltage of the unit is 227, just at the required charging voltage. Within the scope. Connected in series in the charging circuit, the factory limits the charging current.
The experimental results of this program are related to the expected goals. It can accurately determine the information of the busy card and the position of the ball valve, reliably make the action of opening or closing the water valve, and solve the power supply problem of the electric valve when the utility power is cut off. At present, this program has been promoted and put into use in Daqing area. The actual operation is clear, and the control system has high reliability and practicability.
Energy-saving voice-activated street light switch Lanzhou Railway College Telecom and Automatic Control Department Dong Minzheng Wang Deming Dong Gang In order to solve the problem of street lights and waste of electricity, there are many voice-activated automatic delay switches on the market. Many units have received a set of power-saving after installation. effect. However, the actual measurement and analysis show that the power consumption of these switches is too large. At around 1, the long-term power supply and accumulated power waste are still not allowed to be ignored, and when the power 380 invades due to the same reason, it will burn out instantly. The voice-activated delay switch described in this paper has its own power consumption reduced to less than 0.1, and it has the function of resisting power intrusion, ensuring power-saving safety. The working principle of the circuit principle is as follows: the low voltage of the circuit is so low that it can cut the wave. Rectification. The filtering is obtained by 2, and the control is extended by the control of the heart. For low power consumption, the Schmidt trigger core consisting of a 05-period timer has a brighter action when the stomach is brighter.
The size is such that the output of the 3 pin is low level, the voice control circuit must not be in the sleep state, its power consumption is zero, and the function of not turning on the light during the day is realized. When the color becomes dark, the resistance value becomes large, and the 013 pin is low. The level changes to a high level, and the voice-activated switch is energized to enable the light to be turned on and the light-off function to be turned off. Due to the hysteresis characteristics of the Schmidt circuit and the setting of the 3 anti-interference circuit, the nighttime voice-activated delay switch ensures reliable operation.
When the sound-pitch delay switch 1 is used as a reason, such as 1 no-sound signal, the door of the 02 transmission network 1 is low-level, 8 has no charge, and the thyristor 1 is not triggered and turned off, the light is not bright.
After there is a sound signal, 1 will pass the sound signal through two stages, and the amplification will cause the output of the 023 gate to appear high level, the level is quickly charged to the 3rd direction, and the 4th gate changes from the logic high level to the logic low level. The elbow is only triggered by the reverse rotation of the drive door connected in parallel with No. 5 and No. 6, and the household 1 lamp is lit. After the second, the 08 and 7 discharge delays, the lamp household 1 lights up to maintain. When the voltage across 08 is placed below the threshold voltage of 0, the circuit state returns to æ±¹01 to turn off, and to extinguish the power consumption. In addition to the low-power 3 devices, the low-voltage circuit is used in the circuit, and the resistor is used instead of the resistor. Because there is no power consumption, and there is a certain compensation for the power factor of the power grid, the power consumption of the whole circuit itself is very small, and the measured value is 0.1%.
The anti-power attack of the circuit is realized by the sudden increase of the circuit current when the input voltage is equal or wrong. The capacitance, the capacitance of the capacitor is far greater than the impedance of the bulb, and the power is almost all dropped. Thereby ensuring the safety of the delay control circuit. The worst case is that if the household is lit, it may be burned by high pressure. This circuit has the functions of electric power and electric attack. It is better than the commercially available circuit components. The following JVKK selects the LV400V bidirectional thyristor, and the CI selects 0.22. 400, no polarity capacitor, choose 1 into the regulator tube, select 17555 to select 4014 resistor to choose 4wKrX type, KG select bright resistance is 3ka dark resistance is greater than the said photoresistor. Adjust and size 2 to adjust the ambient brightness of the delay switch. The circuit is soldered without errors and can be operated without adjustment.
The low-speed motor has been successfully developed. The low-speed motor developed by Southeast University is composed of a motor and a small-tooth difference reducer. For phase communication, power from 90, to 3 speed 630.3. Many gods. Paying different kinds of power, 71 Duzhu 4 secondary speed, has formed a series of mechanical and electrical products. It is characterized by a large output torque. small volume. The noise is less than 7, which can replace the electric motor worm and worm gear reducer. It is an advanced low-cut, and can be used in (1) spinning, emulsifying electricity, 阢 scientific research, etc., domain and low speed output torque, large noise, small mechanical installation position is limited. occasion.
The card door lock system was successfully developed by Southeast University. The 1 card door lock system is based on high-tech electronic technology. Replacing the lock key with 10 smart cards can realize multi-card lock and multi-lock lock. If the person in charge is equipped with a card. You can open all the doors within your own authority. There are many types of long molybdenum. Can achieve different levels of card to open different levels of locks, once lost, you can immediately change the password of the lock, such as the card molybdenum damage can also be equipped with a molybdenum spoon. The confidentiality is extremely strong, and users with a card writer can prepare a Leica key password as needed. It can also be specified that a certain card can be opened like a normal door lock without complicated AC power supply system. Use only 4 AA batteries. Hotels and restaurants can also deposit cash on the card keys. When a passenger spends at a designated point, such as entertainment, food, shopping, fitness, etc., no cash is required. You can bill on the key. It is very convenient to check out the card when leaving the store. Li Xiangbin’s focus on China’s development is to encourage the development of the 28-page State Planning Commission. The State Economic and Trade Commission promulgated a catalogue of industrial products and technologies that are currently encouraged by the state. This catalogue will serve as a strategic adjustment for the country to guide the economic structure.
The main basis for improving the investment structure and approving investment projects.
This catalogue covers 536 product technologies and infrastructure and service projects in 28 sectors. They are machinery, including precision molding technology and equipment manufacturing, etc.; development and manufacturing of automobile body and body accessories; urban railway light rail equipment localization ratio of 70, above and public transportation construction, etc., oil and gas exploration. The mining of its own equipment imports will be exempt from customs duties and import value-added tax.
The relevant person in charge of the State Planning Commission said. The principle of determining the current industrial products and technologies that the state encourages to develop is that there is a large market demand. The broad development prospects are conducive to the development of the domestic market; it is conducive to promoting enterprise equipment renewal and industrial technology advancement, improving competitiveness; facilitating technological innovation to form new economic growth points; conducive to saving resources and improving the ecological environment; Supply, promote the integration of economic structure
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