Product Description
China Here Factory 15kw 20HP Three Phase CE Ex Flameproof Motor Explosion-Proof Induction Electric Motor
Product Description
Detailed Photos
Installation Instructions
Certifications
FAQ
Q: Are you trading company or manufacturer?
A: We are manufacturer.
Q: What is the payment terms?
A: 30% T/T in advance, 70% before shipment or L/C at sight.
Q: What is your delivery time?
A: standard product 20 days after receiving your L/C or T/T deposit.
Q: What is the MOQ of this item?
A: 1 units for small/medium size motors, unlimited for large ones.
Q: How long is your warranty?
A: 12 months after receiving B/L.
Q: Can we used our own brand on motors ?
A: Yes, OEM and ODM also to be provided. /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
| Application: | Industrial |
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| Operating Speed: | Constant Speed |
| Number of Stator: | Three-Phase |
| Customization: |
Available
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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What is a 3-phase motor and how does it work?
A 3-phase motor is a type of electric motor that operates on a three-phase power supply. It is widely used in various industrial and commercial applications due to its efficiency, reliability, and ability to provide high torque output. Here’s a detailed explanation of what a 3-phase motor is and how it works:
A 3-phase motor consists of three windings, typically placed 120 degrees apart around the motor’s stator. These windings are energized by a balanced three-phase power supply, which generates a rotating magnetic field within the motor. The rotating magnetic field interacts with the motor’s rotor, causing it to rotate and produce mechanical power.
Here’s a step-by-step explanation of how a 3-phase motor works:
- Power Supply: A 3-phase motor requires a three-phase power supply, which typically consists of three alternating current (AC) voltage waveforms that are 120 degrees out of phase with each other. The power supply is connected to the motor’s three windings.
- Stator Windings: The stator windings are coils of wire that are wound around the motor’s stator. Each winding is connected to a different phase of the power supply. When the power supply is energized, alternating current flows through each winding, creating a magnetic field around the stator.
- Rotating Magnetic Field: The three-phase current flowing through the stator windings creates a rotating magnetic field. The rotating magnetic field is produced because the three phases are out of phase with each other by 120 degrees. This rotating magnetic field is responsible for the motor’s operation.
- Rotor: The rotor is the rotating part of the motor. It is typically made of a series of conductive bars or laminated iron cores. The rotor is placed within the rotating magnetic field created by the stator windings.
- Induction or Synchronous Operation: Depending on the design of the motor, it can operate as an induction motor or a synchronous motor.
- Induction Motor: In an induction motor, the rotating magnetic field induces currents in the rotor bars through electromagnetic induction. These induced currents create a magnetic field in the rotor that interacts with the stator’s rotating magnetic field, causing the rotor to rotate. The speed at which the rotor rotates is slightly slower than the speed of the rotating magnetic field, creating a slip. The slip allows the motor to produce torque and overcome inertia or mechanical load.
- Mechanical Power Output: As the rotor rotates within the rotating magnetic field, it generates torque. The torque produced by the motor can be used to drive mechanical loads, such as pumps, fans, compressors, conveyors, or machinery. The motor’s speed and torque output can be controlled by adjusting the frequency or voltage of the three-phase power supply, or by implementing control strategies within the motor’s control system.
Overall, a 3-phase motor is a versatile and efficient motor that operates on a three-phase power supply. It works by creating a rotating magnetic field in the motor’s stator through energized windings. This rotating magnetic field interacts with the rotor, causing it to rotate and generate mechanical power. Whether it operates as an induction motor or a synchronous motor, the 3-phase motor is widely used in various industrial applications due to its reliable and high-performance characteristics.
Can 3-phase motors be adapted for use in both small and large-scale applications?
Yes, 3-phase motors are highly adaptable and can be used in both small and large-scale applications. Here’s a detailed explanation of their adaptability:
- Small-Scale Applications: 3-phase motors are available in a wide range of sizes and power ratings, making them suitable for small-scale applications. These motors can be found in various small industrial machines, appliances, and equipment. They are commonly used in small pumps, compressors, fans, conveyors, blowers, and other devices requiring reliable and efficient motor operation.
- Large-Scale Applications: 3-phase motors are also well-suited for large-scale applications that demand high power and torque. They can be found in heavy-duty industrial machinery and equipment used in manufacturing plants, mining operations, oil refineries, and other industrial sectors. Large-scale applications of 3-phase motors include motor-driven compressors, generators, crushers, mills, conveyor systems, and large HVAC (heating, ventilation, and air conditioning) units.
- Flexibility in Voltage and Frequency: 3-phase motors can operate with different voltage and frequency configurations, allowing for adaptation to various power systems worldwide. They can be designed and configured to accommodate specific voltage and frequency requirements, making them compatible with the electrical infrastructure of different regions and countries. This flexibility in voltage and frequency makes 3-phase motors suitable for both small and large-scale applications globally.
- Motor Control Options: 3-phase motors can be coupled with various control devices and technologies to adapt to different application requirements. For small-scale applications, simple motor starters or contactors can provide basic control functionality. In contrast, large-scale applications often utilize more advanced control systems, such as variable frequency drives (VFDs) or adjustable speed drives (ASDs), which offer precise speed and torque control. These control options allow 3-phase motors to meet the specific needs of both small and large-scale applications.
- Application-Specific Designs: Manufacturers offer a wide range of 3-phase motor designs and configurations to cater to different application requirements. Motors can be customized to meet specific performance criteria, environmental conditions, and industry standards. This adaptability allows 3-phase motors to be optimized for both small and large-scale applications, ensuring optimal efficiency, reliability, and performance.
Overall, the adaptability of 3-phase motors makes them suitable for a wide range of applications, from small-scale to large-scale. Their availability in various sizes, flexibility in voltage and frequency, compatibility with different control options, and ability to be customized for specific applications make them a versatile choice for different industrial needs. Whether it’s powering small machines or driving heavy-duty equipment, 3-phase motors can be adapted to meet the requirements of both small and large-scale applications.
How do 3-phase motors handle variations in voltage and frequency?
3-phase motors are designed to handle variations in voltage and frequency within certain limits. Here’s a detailed explanation of how they handle these variations:
- Voltage Variations:
- 3-phase motors are typically designed to operate within a specific voltage range. As long as the applied voltage remains within this range, the motor can function properly.
- When the voltage supplied to a 3-phase motor varies, the motor’s performance may be affected. If the voltage drops significantly below the rated voltage, the motor may experience reduced torque and power output. Conversely, if the voltage exceeds the rated value, the motor may draw excessive current, leading to overheating and potential damage.
- To handle voltage variations, 3-phase motors often incorporate protective devices such as thermal overload relays or motor protection circuits. These devices can detect abnormal operating conditions caused by voltage fluctuations and take appropriate actions, such as shutting down the motor or reducing its load.
- Frequency Variations:
- The speed of a 3-phase motor is directly proportional to the frequency of the power supply. When the frequency deviates from the rated value, the motor’s speed and performance can be affected.
- If the frequency increases, the motor’s speed will also increase, resulting in higher torque and power output. Conversely, a decrease in frequency will lead to a decrease in speed, resulting in reduced torque and power output.
- 3-phase motors can handle frequency variations up to a certain extent. However, if the frequency deviates too far from the rated value, the motor’s performance may become unstable or it may fail to start altogether.
- For precise control over motor speed, variable frequency drives (VFDs) can be used. VFDs can adjust the frequency of the power supply to the motor, allowing for precise speed control and compensation for frequency variations.
- Voltage and Frequency Tolerance:
- International standards specify the acceptable voltage and frequency tolerances for 3-phase motors. These standards ensure that motors can operate reliably and safely within specified voltage and frequency ranges.
- Motor manufacturers often provide voltage and frequency tolerance specifications for their products. These specifications indicate the allowable range of voltage and frequency variations that the motor can handle without compromising its performance or safety.
- When selecting a 3-phase motor, it is important to consider the voltage and frequency requirements of the specific application and ensure that the motor’s voltage and frequency ratings align with the available power supply.
Overall, 3-phase motors are designed to handle variations in voltage and frequency within specified limits. They incorporate protective devices and can be paired with control devices such as VFDs to compensate for voltage and frequency fluctuations, ensuring optimal performance and protection against potential damage.
editor by CX 2024-04-25