Product Description
FAQ
Q1.What service you can provide?
1) Focus on air centrifugal fan industry for 15 years, can provide advanced techniques support.
2) Professional service team with 24 hours service can make you without worries behind.
3) Enough stock can meet your instant demand.
4) Up to 12 months quality guarantee of products, you can rest assured to use.
5) Products have got 3C and CE certificates.
Q2. How do you ensure your products quality?
We are a professional and unique manufacturer of air blowers in Guandong province, China.
We have full set of production equipment in centrifugal fan industry and complete QC inspection system.
Q3. In order to recommend the suitable product to you, please help confirm the following information:
1) The application of the centrifugal fan
2) The technical parameter requirement
3) Order quantity
4) Special product requirements, such as changing the direction of outlet, special voltage requirements, etc.
Q4: What’s your payment terms ?
By T/T,LC ,40% deposit in advance, balance 60% before shipment.
Q5: How can I place the order?
First CHINAMFG the PI,pay deposit,then we will arrange the production.After finished production need you pay balance. Finally we will ship the Goods.
Q6: When can I get the quotation ?
We usually quote you within 24 hours after we get your inquiry. If you are very urgent to get the quotation.Please call us or tell us in your mail, so that we could regard your inquiry priority.
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| Application: | for Oven, Hot Blast Stove Motor |
|---|---|
| Speed: | Low Speed |
| Number of Stator: | Three-Phase |
| Function: | for Heat Dissipation Cooling |
| Casing Protection: | Closed Type |
| Number of Poles: | 4 |
| Samples: |
US$ 61/Piece
1 Piece(Min.Order) | |
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| Customization: |
Available
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How do 3-phase motors differ from single-phase motors?
3-phase motors and single-phase motors differ in several aspects, including their power supply, construction, performance characteristics, and applications. Here’s a detailed explanation of the differences between 3-phase motors and single-phase motors:
- Power Supply: The primary difference between 3-phase motors and single-phase motors is their power supply. 3-phase motors require a three-phase power supply, which consists of three alternating current (AC) voltage waveforms that are 120 degrees out of phase with each other. In contrast, single-phase motors operate on a single-phase power supply, which consists of a single AC voltage waveform.
- Construction: The construction of 3-phase motors and single-phase motors also differs. 3-phase motors have three sets of windings evenly spaced around the motor’s stator, whereas single-phase motors typically have only one set of windings. The multiple windings in 3-phase motors enable the creation of a rotating magnetic field, which is essential for their operation.
- Starting Mechanism: 3-phase motors and single-phase motors have different starting mechanisms. 3-phase motors can start on their own with a simple direct-on-line (DOL) starting method, where the motor is connected directly to the power supply. In contrast, single-phase motors require additional starting mechanisms, such as capacitors or centrifugal switches, to overcome the need for a rotating magnetic field during startup.
- Starting Torque: 3-phase motors tend to have higher starting torque compared to single-phase motors. The balanced three-phase power supply and the design of 3-phase motors allow them to produce a strong rotating magnetic field, enabling efficient starting and acceleration. Single-phase motors, on the other hand, often experience lower starting torque due to the absence of a rotating magnetic field during startup.
- Efficiency: In terms of efficiency, 3-phase motors are generally more efficient than single-phase motors. The balanced three-phase power supply and the design of 3-phase motors result in smoother operation and reduced losses compared to single-phase motors. This higher efficiency translates to better performance and energy savings in applications where 3-phase motors are utilized.
- Power Rating: 3-phase motors are commonly available in higher power ratings compared to single-phase motors. The ability of 3-phase motors to deliver higher power output makes them suitable for applications that require greater torque and horsepower, such as heavy-duty industrial machinery and equipment. Single-phase motors are typically used in lower power applications, such as household appliances and small tools.
- Applications: The applications of 3-phase motors and single-phase motors also differ. 3-phase motors are widely used in industrial and commercial applications, including pumps, compressors, HVAC systems, electric vehicles, and robotics. Single-phase motors are commonly found in residential and small-scale applications, such as household appliances (e.g., refrigerators, air conditioners, and washing machines) and small tools (e.g., fans and power tools).
These are the key differences between 3-phase motors and single-phase motors. While 3-phase motors offer advantages in terms of efficiency, starting torque, and power rating, single-phase motors are suitable for smaller-scale applications and residential use. The selection of the motor type depends on the specific requirements of the application and the availability of the appropriate power supply.
What safety precautions should be followed when working with 3-phase motors?
Working with 3-phase motors involves electrical and mechanical hazards, so it’s crucial to follow proper safety precautions to reduce the risk of accidents or injuries. Here are some important safety measures to consider:
- Electrical Safety:
- Always work on the motor with the power disconnected. Before starting any maintenance or repair tasks, ensure that the motor is de-energized by disconnecting the power supply and locking out/tagging out the electrical circuit.
- Use appropriate personal protective equipment (PPE), such as insulated gloves, safety glasses, and protective clothing, when working on or near energized parts of the motor. PPE helps protect against electrical shock and other potential hazards.
- Follow proper lockout/tagout procedures to prevent accidental re-energization of the motor while work is being performed. Lockout/tagout procedures involve using lockout devices and tags to isolate and secure the power source.
- Ensure that electrical connections, terminals, and wiring are in good condition and properly insulated. Replace any damaged or worn-out components promptly to prevent electrical hazards.
- Mechanical Safety:
- Before working on the motor, allow it to cool down if it has been running. Touching hot motor surfaces can cause burns.
- Securely mount the motor and ensure it is properly supported to prevent it from falling or tipping during maintenance or operation.
- Avoid wearing loose clothing, jewelry, or anything that could get caught in moving parts. Tie back long hair and remove any dangling accessories.
- Use appropriate tools and equipment for the task at hand. Follow safe work practices and techniques to minimize the risk of injury, such as using proper lifting techniques and avoiding reaching into rotating parts.
- Fire and Hazardous Materials Safety:
- Be aware of flammable or combustible materials in the vicinity of the motor. Keep the motor and its surroundings free from oil, grease, dust, and other potentially combustible substances.
- Ensure that ventilation openings and cooling fins of the motor are clean and unobstructed. Proper airflow is essential for heat dissipation and preventing overheating.
- Follow appropriate procedures for handling, storing, and disposing of hazardous materials such as lubricants, solvents, and cleaning agents. Comply with relevant safety data sheets (SDS) and local regulations.
- Have appropriate fire extinguishing equipment readily available in case of emergencies. Familiarize yourself with the location and proper use of fire extinguishers in your work area.
- Training and Knowledge:
- Ensure that personnel working with 3-phase motors receive proper training on electrical safety, lockout/tagout procedures, and safe work practices specific to motor maintenance and repair.
- Stay updated with the latest industry standards, regulations, and best practices related to electrical and mechanical safety when working with 3-phase motors.
- Consult the motor manufacturer’s documentation and guidelines for specific safety recommendations and precautions related to their particular motor model.
Remember, safety should always be the top priority when working with 3-phase motors. By following these safety precautions and using common sense, you can help ensure a safe work environment and minimize the risk of accidents or injuries.
How do 3-phase motors handle variations in load and speed requirements?
3-phase motors are capable of handling variations in load and speed requirements through various control methods. Here’s a detailed explanation of how they handle these variations:
- Load Variations:
- Inherent Torque Characteristics: 3-phase motors are designed to provide high starting torque and continuous torque output, making them suitable for a wide range of load variations. They can handle sudden changes in load without significant impact on motor performance.
- Overload Capacity: 3-phase motors are typically designed with overload capacity to handle temporary increases in load beyond their rated capacity. This overload capacity allows the motor to withstand sudden surges in load without overheating or tripping protective devices.
- Controlled Speed Regulation: By using control devices such as variable frequency drives (VFDs) or adjustable speed drives (ASDs), the speed and torque output of 3-phase motors can be adjusted in real-time to match the load requirements. This ensures efficient motor operation and minimizes energy wastage.
- Motor Protection Features: 3-phase motors often incorporate protective features such as thermal overload protection and current limiters. These features help safeguard the motor against excessive heat or current, which can result from prolonged high-load conditions. They automatically intervene to protect the motor and prevent damage.
- Speed Variations:
- Variable Frequency Drives (VFDs): 3-phase motors can be coupled with VFDs, which allow precise control of motor speed. VFDs adjust the frequency and voltage supplied to the motor, enabling smooth and accurate speed regulation over a wide range. This flexibility in speed control makes 3-phase motors suitable for applications with varying speed requirements.
- Adjustable Speed Drives (ASDs): Similar to VFDs, ASDs provide speed control capabilities for 3-phase motors. They allow users to adjust the motor’s speed and torque output based on specific application needs. ASDs can be used in various industrial processes that require precise speed control, such as conveyor systems, pumps, and fans.
- Pole Changing Motors: Some 3-phase motors, known as pole changing motors, offer the ability to change the number of poles within the motor. This feature allows for speed variations by altering the motor’s synchronous speed. However, pole changing motors are less common compared to VFD or ASD-controlled motors.
Overall, 3-phase motors can handle variations in load and speed requirements through their inherent torque characteristics, overload capacity, and control options such as VFDs and ASDs. These features and control methods allow for efficient motor operation, precise speed regulation, and the ability to adapt to changing load conditions in various industrial applications.
editor by CX 2024-05-14