Frequency conversion air conditioning inverter IPM protection

Y series best cast iron three phase induction motor

Specifications
1. 20 years manufacturing experience 
2. 12 months guarantee 
3. low noise and temperature rise 
4. high starting torque 

5. AC Voltage: 220V/380V, 380V/660V,400V/690V,220V/400V

 IPM module itself has the dc flow and the overheating protection signal output, its principle as shown in figure 13. IPM module is internal protection circuit AC synchronous generator and internal constitute a loop under the arm, power supply using lower arm E trigger drive power. Protection signal transmission to the CPU, so should pass light lotus root IC9 isolation and Q1, driven by the www.dongfeng-motor.com plug CN1 terminals (1) the output to the motherboard. Protection process analysis is as follows: under the normal state, IPM triode internal protection for by the state, the light lotus root IC9 in globe, transistor Q1 in micro conduction fan motor state, the output voltage is + 4.3 V. Due to the PN voltage is too high, compressor stalling or other reasons, such as the IPM output current is too large, and the heat dissipation, continuous and overheat lamination the IPM, such as work time is too long, IPM internal protection triode by globe into conduction, light lotus root IC9 in conduction, transistor Q1 base for low voltage, Q1 closing, the emitter output low voltage protection signals.

Frost working condition

 (1) the frost starting single phase motor price conditions: outdoor heat exchanger tubes for less than 3 ℃ temperature of compressor running time reached more than 40 minutes. (2) the frost process: (1) compressor with a fixed 80 hz frequency operation. (2) the four-way valve, outdoor fan shut down. (3) the end of the frost conditions: (1) frost up to 10 minutes. (2) www.dongfeng-motor.com the outdoor heat exchanger copper tube wall temperature is higher than 5 ℃ (4) of the indoor and outdoor machine ac motor specification of communication. Indoor and outdoor machine USES asynchronous serial communication mode: indoor machine as the host, for outdoor communication lamination from the machine. 2 consecutive received exactly the same information is valid. Two minutes without communication or receiving signal fault, a fault alarm and shut down the outdoor and indoor fan.

watt

 The power unit of the international system of units.Watt is defined as 1 joule per second (1 j/s),namely every second transformation,use or dissipation (in the) of joule for measurement of the rate of energy. In the electrical electric fan motor system of units,the volt by ampere (V (A).More commonly used in everyday life-kw as a unit,1 mw = 1000 watt.Unit conversion: watt by a British scientist to make a significant contribution to the development of the steam engine was named after James watt.The name of the entity in the first 1889 adopted by the 2nd meeting of the British association for the advancement of ac induction motor 110kw science.In 1960,the international conference on measurement 11th meeting in watts of power in the international system of units (units.People commonly used power unit multiplied by the unit of time to represent the energy.For example,1 kw? R is a power of 1 kw of energy consumed energy wholesalemotor.blogspot.com consumption equipment in 1 hour,is equal to 3.6 million joules.The commonly used formula W = UIT; W = P * T Network watt is small electric motors English words on the water (water).Such as the brain watt,it means that thinking."W" and "bad" in the Shanghai dialect pronunciation similar.

Pump and fan - reciprocating pump

Now with piston type as an example to illustrate its working principle.As shown in figure 1,permanent magnet motor 7,piston pump is mainly composed of a piston in the pump cylinder for reciprocating motion within 2 to 1 liquid inhalation and ruled out.When the piston 1 started from the far-left side to the right position,studio 3 volume gradually expand,indoor pressure is reduced,open fluid suction valve 4,into the piston 1 release space,until motor run capacitor l piston moves to the far end of the process for the pump suction process.When the piston 1 right from the beginning,the move to the left side of pump fluid by squeezing,close the valve on the electricalmotor1.blogspot.com suction,pressure and open the water valve 5 and discharge,this process is called process of pressurized water pump.Piston reciprocating motion,the suction of the pump is continuously alternating with pressurized water process.The motor magnet pump working principle is actually like the compressor refrigeration system,so we are not in this explanation,and behind the compressor parts in detail.This pump is suitable for small flow,high pressure,in a large refrigeration unit used more.

The working principle of motor

Motor (Motors) is a device converts electrical energy into mechanical energy.It is using electric coil (that ac electric motor is,the stator winding) to diesel generator produce a rotating magnetic field and try to turn the mouse cage form magnetoelectric dynamic rotating torque closed aluminum frame.Motor by using the power divided into dc motor and ac motor,electric power system in most of the motor is ac motor,can be synchronous motor or induction motor (motor stator magnetic speed diesel generators prices and rotor rotating speed is not synchronized rate).Motor is mainly composed of stator and rotor,the direction of motion of the wire in the magnetic field force with the direction of current and magnetic induction line in the www.dongfeng-motor.com direction of magnetic field direction.Working principle of the motor is a function of magnetic field on the current stress,to rotate the motor.

Three automatically adjust the excitation current method

Three automatically adjust the excitation current method In the change of generator excitation

current,generally does not directly in the rotor circuit,because the loop current is very big,is not

convenient to adjust directly,usually adopted method is to change the excitation exciter Magnetic current,to achieve the purpose of regulating the generator rotor current.The commonly used method is to change the electrical resistance of the exciter excitation circuit,change the additional exciting current exciter,changing the conduction Angle of silicon controlled rectifier,etc.There are primary

change the thyristor turn-on Angle Method,which is based on the change of the generator three phase induction motor voltage,current,or power factor,accordingly change the conduction Angle of silicon controlled rectifier,so generator field current can change accordingly.The device generally by the transistor,thyristor electronic components,has a spirit Sensitive,rapid and no wholesalemotor.blogspot.com failure zone,big output power,the advantages of small volume and light weight.In accident cases can effectively inhibit overvoltage and achieve rapid out magnetic generator.

Automatically adjust the excitation device usually by measuring unit,synchronous unit,amplification unit, Controlled unit,stable unit,the limited unit and some auxiliary units.Be measured signals (such as voltage,current,etc.),compared with the given value after measurement unit conversion,and then compare the results (bias) the preamplifier unit and power amplifier unit Amplifier,and is used to control thyristor conduction Angle,in order to achieve the purpose of adjusting ac geared motor the generator excitation current.The function of synchronous unit is to phase shifting part of the output of the trigger pulse synchronization with silicon controlled rectifier ac excitation power supply,to ensure the correctness of silicon control triggering.Controlled unit is used in order to make the parallel operation of generator can be stable and reasonable allocation of reactive load.Stable unit is in order to 220v ac electric motor simprove the stability of power system and the introduction of unit.The excitation system stable unit To improve the stability of excitation system.limit Unit is in order to make the generator is not under the condition of excitation or underexcitation run.It must be noted that not every kind of automatic regulating excitation device has the various units,a regulator device of unit with its specific tasks The relevant.

Three-phase asynchronous motor control theory

The energy industry as the foundation of the national economy, for the development of society, economy and the improvement of people's living standard is very important. In the rapid growth of economic environment, China's energy industry faced with dual pressure of economic growth and environmental protection. With the development of computer technology, both in production and life, people's dependence on digital information degree is higher and higher. If the computer is the brain, is neural network, the three-phase asynchronous motor drive system is bones and muscles. The perfect combination between them is the development direction of modern industry. Closely integrated in order to make the ac speed regulation system and information system, at the same time in order to improve the performance of ac speed regulating system itself, must make ac speed regulation system to realize the full digital control. electric vehicle motor Single chip microcomputer has been widely used in the field of ac speed regulating system. For example in 1983 by Intel company development and production of MCS - 96 series is currently one of the high performance MCU series, suitable for high speed and high precision of industrial control. The high-grade type: 8 x 196 KB, 8, 8 x 196 x 196 kc MC, etc on the application of ac speed regulating system in general. The current global economic development, there are two significant interwoven lines: energy and the environment. Energy of tension is not only restricted the considerable economic growth in developing countries, also brought quite a big problem for many developed countries. Where energy concentration also tend to be the focus of the world's hot spots. 

And the development and utilization of energy and protecting the environment has a significant impact. Global warming, acid rain, and a series of environmental disasters are related to the development and utilization of energy. Due to the development theory of ac motor control, the control strategy and control algorithm are also increasingly complex. Extended kalman filtering, FFT, state observer and adaptive control, artificial neural network, and so on are applied to all kinds of ac motor vector control or direct torque control. Therefore, DSP chip in the high performance ac speed regulating system of full digital find skill stage. Such as TI company's MCS320F240 DSP chip, with its high cost performance has become a fully digital ac speed regulating system of choice. TI company recently launched MCS320F240X series products more price down to the level of SCM (single chip micyoco). In the process of fully digital ac speed regulation, various bus also has played a major role. STD bus, industrial PC bus, field bus and CAN bus in the field of automation application of Motor vehicle ac motor system played an important role. The data show that, under the influence of capital, technology, energy prices, China's energy efficiency is much lower than the developed countries. Energy-intensive products of China in the 90 s energy is generally higher than in developed countries 12% to 55%, more than 90% of the energy in the mining, processing and transformation, in the course of storage and transportation and terminal loss and waste. If the energy consumption per unit GNP (tons of standard coal/thousand dollars) country (mid - 90 - s), China respectively is Switzerland, Italy, Japan, France, Germany, Britain, the United States, Canada, 14.4 times, 11.3 times, 10.6 times, 8.8 times, 8.3 times, 7.2 times, 4.6 times and 4.2 times. In 1995, China's coal-fired power plant coal consumption of 412 grams of standard coal/kWh, 1.27 times that of the international advanced level. Therefore, the effective use of energy in our country is very urgent. As one of the large energy consumption of the motor in the aspect of energy saving is a potential can be dug. The total installed capacity of 400 million kilowatts of motor in China, 600 billion KWH, electricity consumption accounted for about 80% of the industrial electricity consumption. In all kinds of used motor, more than 80% for small and medium asynchronous motor under 0.55 220 kw. Overall equipment level in motor system in China is equivalent to the level of developed countries' 50 s. Therefore, 15 plans in the country, the motor system energy saving investment up to 50 billion yuan, so the variable frequency speed regulation system in our country will have a huge market demand. At present, the domestic research in variable frequency speed regulation system is very active, but also is not very ideal in terms of industrialization, most of the market is still dominated by foreign companies. Therefore, in order to accelerate the development of domestic Y series motor variable frequency speed regulation system, www.dongfeng-motor.com you need to the international development trend of variable frequency speed regulation technology and the domestic market demand have a comprehensive understanding.