显示标签为“
Three phase motor”的博文。
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显示标签为“
Three phase motor”的博文。
显示所有博文
OEM industrial electric motors
Specifications
1. effiency: IE2 and IE1
2. 20 years manufacturing experience
3. 12 months guarantee
4. low noise and vibtration
Power frequency withstand voltage test electrical equipment insulation resistance power frequency voltage ability ac electric motor test. Test, the sample (s) will be connected to the test loop by the regulation, gradually increase the voltage to the rated power frequency withstand voltage value of the standard, keep 1 min, then quickly and evenly dropping to zero. Within the prescribed period of time, the sample (s) by insulation breakdown or not surface flashover, argues that passed the test. Power frequency ac acmotor2.blogspot.com withstand voltage test on the voltage higher than the rated working voltage electric equipment, can be found through the test many insulation defects, especially for local defect is more electric generator effective, its disadvantage is that may bring insulation must be damage during pressure test, so should be in the insulation resistance, dielectric loss factor test, power frequency ac withstand voltage test can be performed.
high efficiency high power electric motor Y2 motor
Specifications
1. effiency: IE2 and IE1
2. 20 years manufacturing experience
3. 12 months guarantee
4. low noise and vibtration
Megohmmeter at work, its produce high voltage, the measured object is electrical equipment, so must be used correctly, otherwise it will cause personal and equipment accident. Before use, first of all, to do well the following preparation: (1) the measurement device under test must be before the power cut off, and the short circuit discharge, never promised to electric measuring equipment, to ensure the www.dongfeng-motor.com safety of person and equipment. (2) the possible induction of high voltage equipment, must eliminate this possibility, can be measured. Analyte (3) to clean surface, reduce the contact resistance, ensure the accuracy of measurement results. (4) to check whether megohmmeter before measuring the normal working state, the main check the "0" and "up" two points. The rocking handle, make the motor to achieve rated speed, when short 3 phase induction motor circuit by megger refers to the "0" position, should be to point to in the "up" position when open. (5) when used by Induction motor megger should be in a stable, strong place, permanent magnet motor and away from the big current conductor and external magnetic field.
Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
power range: 0.12-18.5 kW
Centre height of frame: 63-160 mm
Rated Voltage: 380 V
Rated Frequency: 50Hz or 60Hz
Main cooperate with measuring instrument, measuring current transformer in single phase motor line under normal working state, which is used to measure current, voltage, power, etc. Measuring the micro current transformer main requirements: 1, insulation and reliable, and 2, the measuring accuracy of high enough, 3, when measured circuit malfunction appeared high current transformer should be in the proper range of saturation (e.g., 500% of the rated current) to protect the measuring instrument. The current transformer. With current transformer and relay device coordination, mainly occurred in line short circuit overload acmotor2.blogspot.com failure, such as to provide signal to relay device to cut off the fault circuit, to protect the security of the power supply system. Protection with micro current transformer entirely different working conditions and the measurement of transformer, transformer protection is just in several times more than normal current current when to begin to work effectively. Protection of transformer main requirements: 1, insulation and reliable, and 2, enough accuracy limit factor, 3, magnet generator enough thermal stability and dynamic stability.
Electric auxiliary refers to the PTC electrical auxiliary air conditioning hot technology. PTC ceramic is a kind of semiconductor fever, when the outside temperature is reduced, PTC resistance is less, calorific value generator set will increase accordingly. According to this principle, the use of air conditioning of PTC electric auxiliary heating technology, automatically according to the change of room temperature and the size of the indoor machine air volume and change the calorific value, so as to properly adjust indoor temperature, achieve the goal of quick, strong heating. In general, the cold weather will seriously affect the normal air conditioning refrigeration and heating function, and with the function of electric auxiliary heat air conditioning, due to small diesel generator the regulation of electric auxiliary heat to the air conditioning heat, supporting role, is very good to overcome this defect, very suitable for cold region.
FOC control algorithm refers to:the motor in the three-phase system of stator ac current Ia,Ib,Ic,by three phase - two phase transformation (CLARK transformation),equivalent to two phase static www.facebook.com/guohong.trading coordinates system,ac current Ia1Ib1 again by pressing the rotor field-oriented rotation transform (PARK transformation),equivalent to dc current Im1,It1 under synchronous rotating coordinate system (Im1 is equivalent to motor parts the excitation current of dc motor; It1 and torque is proportional to the armature current),and then imitate the dc motor control method,control of dc motor is obtained. Then use the PARK transformation,the CLARK transformation transform dc control volume for the required three intersection traffic,and then control the motor. Since fan motor 341 with no transfer of control method,and the beginning of the beginning of 341 does not start in a closed-loop manner,its startup mode is as follows:first,by applying specific to the motor vector,forcing the rotor moves to the specified lamination location (PARK). To PARK at the end of the open loop operation of electric Angle as the starting point,and reach the threshold speed closed-loop model,after if magnetic flux test is successful,achieve real closed-loop control,implement FOC control algorithm.
