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|Frequency conversion explosion-proof motor|
|Author: Unknown Date: 2017-10-28 Hits:|
I. Overview of variable frequency explosion-proof motor
The frequency conversion explosion-proof motor is a new product developed and developed by our company based on the YB3 series motors in combination with current domestic and foreign electromagnetic structure, technology, materials and other new technologies. It has good speed regulation performance, energy saving, large temperature rise margin, It has the advantages of long life, good performance, low noise, advanced flameproof structure, high reliability, convenient use and maintenance, etc. It can be used with various inverter devices at home and abroad to help save energy and achieve automatic control. Its rated power, rated speed and installation dimensions are the same as YB3 series explosion-proof motors.
The frequency conversion explosion-proof motor meets the GB755-2000 "rotating motor quota and performance" industry standard JB / T7565.1-2004 "YB3 series flameproof three-phase asynchronous motor technical conditions (frame number H100-355)". Its explosion-proof performance meets the requirements of GB3836.1-2000 "Electrical Equipment for Explosive Gas Environments Part 1: General Requirements" and GB3836.2-2000 "Electrical Equipment for Explosive Gas Environments Part 2: Explosion-proof Type" d "", Explosion-proof ExdI, ExdIIAT4, ExdIIBT4, respectively, are suitable for use in underground mines (non-excavation working faces) and factories in IIA, IIB, temperature groups T1 ~ T4 group of explosive gas environment dangerous places.
The protection grade of the inverter explosion-proof motor is IP54 or IP55, and the cooling method is IC416.
Variable frequency explosion-proof motors can also be made into wet tropical, dry tropical, outdoor and outdoor anti-corrosive and outdoor wet and heat types.
Second, the conditions of use of variable frequency explosion-proof motor
Altitude: Applicable at an altitude not exceeding 1000 meters
Ambient air temperature: The lowest ambient air temperature is -15 ° C, the highest is 35 ° C (under the coal mine) or 40 ° C (factory). The maximum relative humidity of the ambient air does not exceed 95% (when the temperature is 25 ° C) (under the coal mine) or the wettest monthly average relative humidity is 90%. At the same time, the monthly minimum average temperature of the month is not higher than 25 ° C (factory).
Rated voltage: 380V
Rated frequency: 50Hz
Working method: continuous working system (S1)
Three. Structure description of variable frequency explosion-proof motor
The frequency conversion explosion-proof motor adopts computer-aided design, so that the motor can adapt to the condition of SPWM and PWM frequency conversion power supply. In the design, special consideration is given to the stator, rotor slot type and stator winding distribution form to obtain a more suitable inductance value. Suppress and reduce the harmful effects of harmonics.
The electromagnetic load design of variable frequency explosion-proof motors takes into account a certain margin, which can ensure the motor's overload capacity at high frequencies and maintain constant torque output at low frequencies. In addition, the motor insulation system uses the internationally widely used Class F insulation system, which has reliable insulation and excellent performance. In terms of structural design, its installation dimensions are the same as YB2 series motors, which is convenient for users to use.
The variable frequency explosion-proof motor uses a separate axial flow fan to force ventilation to ensure that the motor has a good cooling effect when running at different speeds.
4. Technical parameters of variable frequency explosion-proof motor
Rated voltage: 380V, 660V, 380V / 660V
Rated frequency: 50HZ
Power range: 0.55KW-315KW
Protection level: IP55
Insulation class: Class F
Installation and dimensions: same as YB3
Electrical performance index and main technical data: same as YB3
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