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M2QA marine variable frequency motor

M2QA0.37-2P M2QA0.55-2P M2QA0.75-2P M2QA1.1-2P 
M2QA1.5-2P M2QA2.2-2P M2QA3-2P M2QA4-2P 
M2QA5.5-2P M2QA7.5-2P M2QA11-2P M2QA15-2P 
M2QA18.5-2P M2QA22-2P M2QA30-2P M2QA37-2P 
M2QA45-2P M2QA55-2P M2QA75-2P M2QA90-2P 
M2QA110-2P M2QA132-2P M2QA160-2P M2QA200-2P 
M2QA250-2P M2QA315-2P M2QA0.25-4P M2QA0.37-4P 
M2QA0.55-4P M2QA0.75-4P M2QA1.1-4P M2QA1.5-4P 
M2QA2.2-4P M2QA3-4P M2QA4-4P M2QA5.5-4P M2QA7.5-4P 
M2QA11-4P M2QA15-4P M2QA18.5-4P M2QA22-4P
M2QA30-4P M2QA37-4P M2QA45-4P M2QA55-4P M2QA75-4P
M2QA90-4P M2QA110-4P M2QA132-4P M2QA160-4P 
M2QA200-4P M2QA250-4P M2QA315-4P M2QA0.18-6P 
M2QA0.25-6P M2QA0.37-6P M2QA0.55-6P
M2QA0.75-6P M2QA1.1-6P M2QA1.5-6P M2QA2.2-6P
M2QA3-6P M2QA4-6P M2QA5.5-6P M2QA7.5-6P
M2QA11-6P M2QA15-6P M2QA18.5-6P M2QA22-6P
M2QA30-6P M2QA37-6P M2QA45-6P M2QA55-6P
M2QA75-6P M2QA90-6P M2QA110-6P M2QA132-6P
M2QA160-6P M2QA200-6P M2QA250-6P 
M2QA0.18-8P M2QA0.25-8P M2QA0.37-8P M2QA0.55-8P
M2QA0.75-8P M2QA1.1-8P M2QA1.5-8P M2QA2.2-8P
M2QA3-8P M2QA4-8P M2QA5.5-8P M2QA7.5-8P
M2QA11-8P M2QA15-8P M2QA18.5-8P M2QA22-8P
M2QA30-8P M2QA37-8P M2QA45-8P M2QA55-8P
M2QA75-8P M2QA90-8P M2QA110-8P M2QA132-8P
M2QA160-8P M2QA200-8P 

M2QA71M2A M2QA71M2B M2QA80M2A M2QA80M2B
M2QA90S2A M2QA90L2A M2QA100L2A M2QA112M2A
M2QA132S2B M2QA160M2A M2QA160M2B M2QA160L2A
M2QA160L2B M2QA180M2A M2QA200L2A M2QA200L2B
M2QA225M2A M2QA250M2A M2QA280S2A M2QA280M2A
M2QA315S2A M2QA315M2A M2QA315L2A M2QA315L2B
M2QA355M2A M2QA355L2A
M2QA71M4A M2QA71M4B M2QA80M4A M2QA80M4B
M2QA90S4A M2QA90L4A M2QA100L4A M2QA112M4A
M2QA132S4B M2QA160M4A M2QA160M4B
M2QA160L4A
M2QA160L4B M2QA180M4A M2QA200L4A M2QA200L4B
M2QA225M4A M2QA250M4A M2QA280S4A M2QA280M4A
M2QA315S4A M2QA315M4A M2QA315L4A M2QA315L4B
M2QA71M6A M2QA71M6B M2QA80M6A M2QA80M6B
M2QA90S6A M2QA90L6A M2QA100L6A M2QA112M6A
M2QA132S6B M2QA160M6A M2QA160M6B M2QA160L6A
M2QA160L6B M2QA180M6A M2QA200L6A M2QA200L6B
M2QA225M6A M2QA250M6A M2QA280S6A M2QA280M6A
M2QA315S6A M2QA315M6A M2QA315L6A M2QA315L6B
M2QA355M6A M2QA355L6A
M2QA71M8A M2QA71M8B M2QA80M8A M2QA80M8B
M2QA90S8A M2QA90L8A M2QA100L8A M2QA112M8A
M2QA132S8B M2QA160M8A M2QA160M8B M2QA160L8A
M2QA160L8B M2QA180M8A M2QA200L8A M2QA200L8B
M2QA225M8A M2QA250M8A M2QA280S8A M2QA280M8A
M2QA315S8A M2QA315M8A M2QA315L8A M2QA315L8B
M2QA355M8A M2QA355L8A

The M2QA series Marine three-phase asynchronous motors are the latest generation marine mechanical equipment in ABB Motor Company's M2000 series. The outer Shell is made of high-strength cast iron to avoid secondary damage. After special design and manufacture, with high efficiency, starting torque and other advantages, suitable for all kinds of marine machinery drive, such as: Pumps, fans, separators, hydraulic machinery, auxiliary equipment and similar requirements of other marine equipment. The motor is designed in strict accordance with GB755"rotating motor rating and performance" and ZC "code for the construction of steel sea-going ships" , and has been approved by the State Ship Inspection Bureau, and has obtained the China Classification Society type approval certificate. At the same time conforms to ABS, BV, DNV, GL, IEC, KR, LR, NK and other international standards and related classification society specifications.

1. The motor conforms to the following Standards International Electrotechnical Commission IEC34, IEC72 Australian Standard AS1359-2 British Standard BS4999-5000 German Standard Din42673 conforms to the European Community "CE" mark request the motor conforms to GB755(idt IEC 60034-1, GB10069 Neq IEC 60034-9, Q / JBQS282, superior motor performance low noise, low vibration, through the optimized design and the craft improvement, the M2QA-H series motor in the noise, the vibration has reduced greatly and achieves the international advanced level. High performance protection level, the standard design protection level of the motor IP55, according to customer requirements to provide higher protection level. It is suitable for wide voltage. The design of motor takes the voltage variation of different regions into account, so that the motor can be used in many regions and the user's performance can be guaranteed. The insulation grade is increased and the service life of the motor is prolonged. The Standard Motor adopts the F grade insulation structure, thus the service life of the motor and the reliability of the motor are increased. High efficiency, the motor uses the optimization design, has the high efficiency, may produce the remarkable energy conservation effect. 3, transmission motor can be belt pulley, spur gear or elastic coupling drive. 4. The surface of the windings and metal parts of the motor are painted and treated according to the requirements of the hygrothermal motor. The Motor has good performance of moisture-proof, mould-proof and salt-fog-proof after special painting and treatment. Service conditions: Altitude 0M annulus temperature in-25 °c-50 °C air relative humidity: not more than 95% condensation: SALT MIST: Oil Mist: Mold: IMPACT: Vibration: 22.5 degrees of tilt: voltage, frequency and mode of operation 380V (50HZ)440V (60HZ) mode of operation: Continuous (S1) bearings: NSK bearings, Japan, if users need specific working voltage, can be supplied according to special requirements.

Variable frequency motor refers to the motor that runs continuously under standard environmental conditions with 100% rated load within the range of 10%~100% rated speed, and the temperature rise does not exceed the calibration allowable value of the motor.

With the rapid development of power electronics technology and new semiconductor devices, ac speed regulation technology has been constantly improved and improved, and gradually improved inverter with its good output waveform, excellent performance ratio in ac machines have been widely used. For example: the steel used for rolling large motor and medium and small electric motor, railway and urban rail transit with traction motor, elevator, container lifting equipment with lifting motor, water pump and fan with motor, compressor, home appliances, have to use ac variable frequency speed regulating motor, and has obtained the good effect [1]. The use of ac variable frequency speed regulating motor has obvious advantages over dc speed regulating motor:

(1) easy speed regulation, and energy saving.

(2) ac motor simple structure, small size, small inertia, low cost, easy maintenance, durable.

(3) the capacity can be expanded to achieve high speed and high voltage operation.

(4) soft start and fast braking can be realized.

(5) no spark, explosion-proof, strong adaptability to the environment. [1]

In recent years, the variable-frequency speed-regulating drive device has been developing at an annual growth rate of 13%-16%, and has gradually replaced most of the dc speed-regulating drive device. Because the common asynchronous motor which works with constant frequency and constant voltage power supply has great limitation when it is applied to the variable frequency speed regulation system, the special variable frequency ac motor which is designed according to the use occasion and the use requirement has been developed abroad. For example, there are motors for low noise and low vibration, motors for improving low speed torque characteristics, motors for high speed, motors with speed measuring generator and vector control motors, etc. [1].

Construction principle editing

When the slip rate changes little, the speed is proportional to the frequency, it can be seen that changing the power frequency can change the speed of the asynchronous motor. In frequency conversion speed regulation, the total hope that the main magnetic flux remains unchanged. If the main magnetic flux is larger than the magnetic flux in normal operation, the magnetic circuit is oversaturated and the excitation current increases and the power factor decreases. If the main magnetic flux is less than the magnetic flux in normal operation, the motor torque decreases [1].

Development process editor

Current motor frequency conversion system is mostly used constant V/F control system, this frequency conversion control system is characterized by simple structure, cheap production. This system is widely used in the fan and other large and for the dynamic performance of the system is not very high requirements. This system is a typical open-loop control system, which can meet the requirements of the smooth speed of most motors, but for dynamic and static performance are limited, can not be applied to the dynamic and static performance requirements are more strict. In order to achieve high performance of dynamic and static regulation, we can only use closed loop control system to achieve. So some researchers put forward the closed-loop slip frequency control of motor speed control mode, this way of speed adjustment to achieve high performance in static and dynamic speed, but the system only has been applied in motor speed is slow, because when the speed of the motor is higher, the system will not achieve the purpose of saving electricity, also can make the motor transient current greatly, makes the motor torque change in an instant. Therefore, in order to achieve high dynamic and static performance in a high speed, only to solve the problem of transient current generated by the motor, only to solve this problem reasonably, we can better develop the motor frequency energy-saving control technology. [2]

Main features editor

The frequency conversion special motor has the following characteristics:

B class temperature rise design, F class insulation manufacturing. The use of polymer insulation materials and vacuum pressure paint manufacturing process and the use of special insulation structure, so that the electrical winding insulation voltage withstand and mechanical strength has been greatly improved, enough to be qualified for high speed motor operation and resistance to frequency converter high-frequency current shock and voltage damage to the insulation.

High balance quality, vibration level for R class (vibration reduction level) high precision machine parts processing, and the use of special high-precision bearings, can run at high speed.

Forced ventilation and heat dissipation system, all imported axial fan ultra-quiet, high life, strong wind. Ensure the motor at any speed, get effective heat dissipation, can achieve high-speed or low-speed long-term operation.

The YP series motor designed by AMCAD software has a wider range of speed regulation and higher design quality compared with the traditional frequency conversion motor. With wide range of constant torque and power speed regulation characteristics, speed regulation is stable, no torque ripple.

It has good parameter matching with all kinds of frequency converters, and can realize zero speed full torque, low frequency large torque, high precision speed control, position control and fast dynamic response control. YP series variable frequency special motor can be used to prepare brake, encoder supply, so that can get accurate stop, and through the speed closed-loop control to achieve high precision speed control.

The precise control of super low speed stepless speed regulation is realized by using "reducer + inverter special motor + encoder + inverter". YP series frequency conversion special motor has good universality, its installation size conforms to IEC standard, and has the interchangeability with the general standard motor.

Motor insulation damage editor

In the popularization and application of ac frequency conversion motors, a large number of ac frequency conversion speed regulating motors suffered early insulation damage. Many ac frequency conversion motor operating life only 1 ~ 2 years, some only a few weeks, even in the test operation of the motor insulation damage, and usually occurs between turns insulation, which puts forward a new topic for the motor insulation technology. Practice has proved that the insulation design theory of motor under power frequency sine wave voltage developed in the past few decades cannot be applied to ac variable frequency speed regulating motor. It is necessary to study the damage mechanism of the insulation of frequency conversion motors, establish the basic theory of insulation design of ac frequency conversion motors, and establish the industrial standard of ac frequency conversion motors.

Damage to electromagnetic wire

1.1 partial discharge and space charge

At present, IGB T(insulated gate diode) PWM (Pulse width m odulatio n- Pulse width modulation) inverter is used to control the ac motor. Its power range is about 0.75 ~ 500kW. IGBT technology can provide extremely short rise time of the current, its rise time in 20 ~ 100 s, the resulting electrical pulse has a very high switching frequency, up to 20 KHZ. When a rapidly rising edge voltage is applied from the inverter to the motor end, a reflected voltage wave is generated due to the impedance mismatch between the motor and the cable. This reflection wave returns to the inverter and induces another reflection wave due to the impedance mismatch between the cable and the converter to be applied to the original voltage wave, thus producing a peak voltage at the voltage wave front. The peak voltage depends on the rise time of the pulse voltage and the length of the cable [1].

Generally, when the length of the wire increases, both ends of the wire produce overvoltage. The amplitude of overvoltage at the motor end increases with the length of the cable and tends to be saturated. However, the overvoltage at the power end is smaller than that at the motor end, and is almost independent of the length of the cable. The results show that the over-voltage is generated at the rising and falling edges of the voltage, and the attenuation oscillation occurs. There are two kinds of PWM driving pulse waveform, one is the switching frequency. The repetition frequency of peak voltage is proportional to the switching frequency. The other is the basic frequency, which directly controls the speed of the motor. At the beginning of each fundamental frequency, the pulse polarities range from positive to negative or from negative to positive. At this time, the motor insulation is subjected to a full-amplitude voltage twice the value of the peak voltage. In addition, in a scattered-embedded three-phase motor, the polarity of the voltage between two adjacent turns of different phases may be different, and the jump of the full-amplitude voltage may be twice the value of a peak voltage. According to the test, the output voltage waveform of PWM converter, in the ac system of 380/480v, the peak voltage measured at the motor end is 1.2 ~ 1.5kv, while in the ac system of 576/600v, the peak voltage measured reaches 1.6 ~ 1.8kv. It is obvious that surface partial discharge occurs between windings under the full amplitude voltage. Due to ionization, a space charge is generated in the air gap, thus forming an induced electric field opposite to the applied electric field. When the voltage polarity changes, this reverse electric field is in the same direction as the applied electric field. In this way, a higher electric field is generated, which will lead to an increase in the number of partial discharges and eventually lead to breakdown. The test shows that the electric shock acting on the insulation between these turns depends on the specific performance of the wire and the rise time of the PWM drive current. If the rise time is less than 0.1s, 80% of the potential will be added to the first two turns of the winding, that is, the shorter the rise time is, the greater the electric shock is, and the shorter the life of the insulation between the turns [1].

1.2 medium loss and heating

When E exceeds the critical value of insulator, the dielectric loss increases rapidly. When the frequency increases, the partial discharge increases, resulting in heat, which causes greater leakage current, which makes Ni rise faster, that is, the temperature of the motor rises and the insulation ages faster. In short, it is due to the above partial discharge, dielectric heating, space charge induction and other factors that cause premature damage of the electromagnetic line in the variable frequency motor [1].

Damage to main insulation, phase insulation and insulation paint

As mentioned above, the use of PWM variable frequency power supply increases the amplitude of the oscillating voltage at the terminal of the variable frequency motor. Therefore, the main insulation, phase insulation and insulation paint of the motor are subject to higher electric field intensity. According to the test, due to the comprehensive influence of the inverter output voltage rise time, cable length and switching frequency, the peak voltage of the above terminal can exceed 3kV. In addition, when partial discharge occurs between the windings of the motor, the electric energy stored by the distributed capacitance in the insulation will be changed into heat, radiation, mechanical and chemical energy, so as to degrade the whole insulation system, reduce the breakdown voltage of the insulation, and eventually lead to the breakdown of the insulation system.

 

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