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YVF/YVF2 series variable frequency speed regulation motors are the latest generation of special three-phase asynchronous motors for variable frequency speed regulation launched by our company. This vfd drive ac motor is a universal variable frequency speed regulating motor developed and designed on the basis of Y/Y2 series motors. It can be well matched with the inverters of different manufacturers in the current market, and the frequency conversion range is 5-100Hz or 3-100Hz. YVF motor has the advantages of high efficiency, low noise, obvious energy saving effect, stable driving, wide speed range, fast response and excellent performance. This series of motors are widely used in applications requiring high-precision speed regulation such as numerical control, textiles, metallurgy, etc., and can also be applied to fan and water pump loads for the purpose of energy saving. The average energy saving rate of a single machine can reach 30-60%.
Product Detail
Motor Type: vfd drive motor
Output Power: 0.55kW - 30 kW
Frame Size: IEC 80 - 200
Rated Voltage: 380V
Frequency: 50 / 60 Hz
Protection Level: IP54 / IP55
Insulation Class: B / F
Cooling Method: ICO141
Working Duty: Continuous (S1)
Product Parameter (specification)
1000 rpm ac motor and 2000 rpm ac motor and 600 rpm ac motor and 3000 rpm ac motor and 4000 rpm ac motor and 3000 rpm electric motor and 1500 rpm ac motor and 500 rpm ac motor
Production Features
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The difference between variable frequency motor and ordinary motor
The ordinary asynchronous motors of Liyuan Motors are designed according to constant frequency and constant voltage, which cannot fully meet the requirements of variable frequency speed regulation. The following is the influence of the frequency converter on the motor.
1. The efficiency and temperature rise of the motor
Regardless of the type of frequency converter, different degrees of harmonic voltage and current are generated during operation, making the motor run under non-sinusoidal voltage and current. Refusal to introduce the information. Taking the currently commonly used sine wave PWM inverter as an example, its low-order harmonics are basically zero, and the remaining high-order harmonic components, which are about twice the carrier frequency, are: 2u+1 (u Is the modulation ratio).
High-order harmonics will cause the increase of stator copper loss, rotor copper (aluminum) loss, iron loss and additional loss, the most significant is the rotor copper (aluminum) loss. Because the asynchronous motor rotates at a synchronous speed close to the fundamental frequency, the high-order harmonic voltage cuts the rotor bar with a large slip, which will cause a large rotor loss. In addition, the additional copper loss due to the skin effect needs to be considered. These losses will cause the motor to generate additional heat, reduce the efficiency, and reduce the output power. For example, if an ordinary three-phase asynchronous motor is operated under the condition of a non-sinusoidal power supply output by the frequency converter, its temperature rise will generally increase by 10%-20%.
2. The insulation strength of the motor
At present, many small and medium-sized inverters adopt PWM control methods. Its carrier frequency is about several thousａnd to ten kilohertz, which makes the motor stator winding to withstａnd a very high rate of voltage rise, which is equivalent to imposing a steep impulse voltage on the motor, which makes the motor’s turn-to-turn insulation more resistant. The harsh test. In addition, the rectangular chopping impulse voltage generated by the PWM frequency converter is superimposed on the motor operating voltage, which poses a threat to the motor's ground insulation, and the ground insulation will accelerate its aging under repeated impacts of high voltage.
