Product Description

Features:
Liquid oil-immersed precision turbine worm drive, low temperature rise and low noise of the whole machine;
Double mechanical limit structure to ensure the effectiveness and precision of the door switch in place;
It can automatically cut off the power supply of the machine, and in a safe state, manually lift the door up and
down;
Manual zipper operation can automatically cut off the power supply of the machine. In a safe state, the manual
zipper can lift up and down the door body;
360° direction, hand zipper mechanism, improve the applicability of installation space and the convenience of
operation;
It can be adapted to various external devices such as button switches, warning lights, infrared, airbags, and
ground sense.

AC Motor

Technical data
 

Model (Single Phase AC220V±10%) EBAC40 EBAC60 EBAC100
Rated Power 300W 400W 550W
Torque 40N.m 60N.m 100N.m
No-load Continuous Running Time 15min 8min
Model (Three Phase AC380V±10%) EBAC60S EBAC100S EBAC150S
Rated Power 400W 550W 750W
Torque 60N.m 100N.m 150N.m
No-load Continuous Running Time 15min

Control Box

 Company Profile

HangZhou CHINAMFG Construction Material Co., Ltd. is specialized in Door & Window industry,
producing garage door, industrial door and door opener, hardwares like shaft, spring, track, hinges,
rollers etc. Our products have been exported to Europe, Asia, American, African and Australia, and
we have good reputation among our customers.

5. Packing and shipping

FAQ

Q1. Can I get a sample for free?

A. Yes, we provide free samples for our customers, and you just need to pay the freight.

Q2. What’s the payment way?

A. Usually, we accept L/C, T/T.

Q3. What’s the quality warranty for the products?

A. We provide 1 year warranty for all of our products.

Q4. How is the delivery time?

A. It is about 15-20 working days for 20ft container after the payment.

Q5. What about the price?

A. The price is negotiable. Best price at large quantity.

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Structure: Straight Arm
Driving Type: Electromechanical
Electric Current Type: AC
Product Name: AC Automatic Door Operators Sectio
Input Voltage: 220V/380V
Output Torque: 35nm~500nm
Samples:
US$ 400/Piece
1 Piece(Min.Order)

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Customization:
Available

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induction motor

How do variable frequency drives (VFDs) impact the performance of AC motors?

Variable frequency drives (VFDs) have a significant impact on the performance of AC motors. A VFD, also known as a variable speed drive or adjustable frequency drive, is an electronic device that controls the speed and torque of an AC motor by varying the frequency and voltage of the power supplied to the motor. Let’s explore how VFDs impact AC motor performance:

  • Speed Control: One of the primary benefits of using VFDs is the ability to control the speed of AC motors. By adjusting the frequency and voltage supplied to the motor, VFDs enable precise speed control over a wide range. This speed control capability allows for more efficient operation of the motor, as it can be operated at the optimal speed for the specific application. It also enables variable speed operation, where the motor speed can be adjusted based on the load requirements, resulting in energy savings and enhanced process control.
  • Energy Efficiency: VFDs contribute to improved energy efficiency of AC motors. By controlling the motor speed based on the load demand, VFDs eliminate the energy wastage that occurs when motors run at full speed even when the load is light. The ability to match the motor speed to the required load reduces energy consumption and results in significant energy savings. In applications where the load varies widely, such as HVAC systems, pumps, and fans, VFDs can provide substantial energy efficiency improvements.
  • Soft Start and Stop: VFDs offer soft start and stop capabilities for AC motors. Instead of abruptly starting or stopping the motor, which can cause mechanical stress and electrical disturbances, VFDs gradually ramp up or down the motor speed. This soft start and stop feature reduces mechanical wear and tear, extends the motor’s lifespan, and minimizes voltage dips or spikes in the electrical system. It also eliminates the need for additional mechanical devices, such as motor starters or brakes, improving overall system reliability and performance.
  • Precision Control and Process Optimization: VFDs enable precise control over AC motor performance, allowing for optimized process control in various applications. The ability to adjust motor speed and torque with high accuracy enables fine-tuning of system parameters, such as flow rates, pressure, or temperature. This precision control enhances overall system performance, improves product quality, and can result in energy savings by eliminating inefficiencies or overcompensation.
  • Motor Protection and Diagnostic Capabilities: VFDs provide advanced motor protection features and diagnostic capabilities. They can monitor motor operating conditions, such as temperature, current, and voltage, and detect abnormalities or faults in real-time. VFDs can then respond by adjusting motor parameters, issuing alerts, or triggering shutdowns to protect the motor from damage. These protection and diagnostic features help prevent motor failures, reduce downtime, and enable predictive maintenance, resulting in improved motor reliability and performance.
  • Harmonics and Power Quality: VFDs can introduce harmonics into the electrical system due to the switching nature of their operation. Harmonics are undesirable voltage and current distortions that can impact power quality and cause issues in the electrical distribution network. However, modern VFDs often include built-in harmonic mitigation measures, such as line reactors or harmonic filters, to minimize harmonics and ensure compliance with power quality standards.

In summary, VFDs have a profound impact on the performance of AC motors. They enable speed control, enhance energy efficiency, provide soft start and stop capabilities, enable precision control and process optimization, offer motor protection and diagnostic features, and address power quality considerations. The use of VFDs in AC motor applications can lead to improved system performance, energy savings, increased reliability, and enhanced control over various industrial and commercial processes.

induction motor

Can you explain the difference between single-phase and three-phase AC motors?

In the realm of AC motors, there are two primary types: single-phase and three-phase motors. These motors differ in their construction, operation, and applications. Let’s explore the differences between single-phase and three-phase AC motors:

  • Number of Power Phases: The fundamental distinction between single-phase and three-phase motors lies in the number of power phases they require. Single-phase motors operate using a single alternating current (AC) power phase, while three-phase motors require three distinct AC power phases, typically referred to as phase A, phase B, and phase C.
  • Power Supply: Single-phase motors are commonly connected to standard residential or commercial single-phase power supplies. These power supplies deliver a voltage with a sinusoidal waveform, oscillating between positive and negative cycles. In contrast, three-phase motors require a dedicated three-phase power supply, typically found in industrial or commercial settings. Three-phase power supplies deliver three separate sinusoidal waveforms with a specific phase shift between them, resulting in a more balanced and efficient power delivery system.
  • Starting Mechanism: Single-phase motors often rely on auxiliary components, such as capacitors or starting windings, to initiate rotation. These components help create a rotating magnetic field necessary for motor startup. Once the motor reaches a certain speed, these auxiliary components may be disconnected or deactivated. Three-phase motors, on the other hand, typically do not require additional starting mechanisms. The three-phase power supply inherently generates a rotating magnetic field, enabling self-starting capability.
  • Power and Torque Output: Three-phase motors generally offer higher power and torque output compared to single-phase motors. The balanced nature of three-phase power supply allows for a more efficient distribution of power across the motor windings, resulting in increased performance capabilities. Three-phase motors are commonly used in applications requiring high power demands, such as industrial machinery, pumps, compressors, and heavy-duty equipment. Single-phase motors, with their lower power output, are often used in residential appliances, small commercial applications, and light-duty machinery.
  • Efficiency and Smoothness of Operation: Three-phase motors typically exhibit higher efficiency and smoother operation than single-phase motors. The balanced three-phase power supply helps reduce electrical losses and provides a more constant and uniform torque output. This results in improved motor efficiency, reduced vibration, and smoother rotation. Single-phase motors, due to their unbalanced power supply, may experience more pronounced torque variations and slightly lower efficiency.
  • Application Suitability: The choice between single-phase and three-phase motors depends on the specific application requirements. Single-phase motors are suitable for powering smaller appliances, such as fans, pumps, household appliances, and small tools. They are commonly used in residential settings where single-phase power is readily available. Three-phase motors are well-suited for industrial and commercial applications that demand higher power levels and continuous operation, including large machinery, conveyors, elevators, air conditioning systems, and industrial pumps.

It’s important to note that while single-phase and three-phase motors have distinct characteristics, there are also hybrid motor designs, such as dual-voltage motors or capacitor-start induction-run (CSIR) motors, which aim to bridge the gap between the two types and offer flexibility in certain applications.

When selecting an AC motor, it is crucial to consider the specific power requirements, available power supply, and intended application to determine whether a single-phase or three-phase motor is most suitable for the task at hand.

induction motor

How does the speed control mechanism work in AC motors?

The speed control mechanism in AC motors varies depending on the type of motor. Here, we will discuss the speed control methods used in two common types of AC motors: induction motors and synchronous motors.

Speed Control in Induction Motors:

Induction motors are typically designed to operate at a constant speed determined by the frequency of the AC power supply and the number of motor poles. However, there are several methods for controlling the speed of induction motors:

  1. Varying the Frequency: By varying the frequency of the AC power supply, the speed of an induction motor can be adjusted. This method is known as variable frequency drive (VFD) control. VFDs convert the incoming AC power supply into a variable frequency and voltage output, allowing precise control of motor speed. This method is commonly used in industrial applications where speed control is crucial, such as conveyors, pumps, and fans.
  2. Changing the Number of Stator Poles: The speed of an induction motor is inversely proportional to the number of stator poles. By changing the connections of the stator windings or using a motor with a different pole configuration, the speed can be adjusted. However, this method is less commonly used and is typically employed in specialized applications.
  3. Adding External Resistance: In some cases, external resistance can be added to the rotor circuit of an induction motor to control its speed. This method, known as rotor resistance control, involves inserting resistors in series with the rotor windings. By varying the resistance, the rotor current and torque can be adjusted, resulting in speed control. However, this method is less efficient and is mainly used in specific applications where precise control is not required.

Speed Control in Synchronous Motors:

Synchronous motors offer more precise speed control compared to induction motors due to their inherent synchronous operation. The following methods are commonly used for speed control in synchronous motors:

  1. Adjusting the AC Power Frequency: Similar to induction motors, changing the frequency of the AC power supply can control the speed of synchronous motors. By adjusting the power frequency, the synchronous speed of the motor can be altered. This method is often used in applications where precise speed control is required, such as industrial machinery and processes.
  2. Using a Variable Frequency Drive: Variable frequency drives (VFDs) can also be used to control the speed of synchronous motors. By converting the incoming AC power supply into a variable frequency and voltage output, VFDs can adjust the motor speed with high accuracy and efficiency.
  3. DC Field Control: In some synchronous motors, the rotor field is supplied by a direct current (DC) source, allowing for precise control over the motor’s speed. By adjusting the DC field current, the magnetic field strength and speed of the motor can be controlled. This method is commonly used in applications that require fine-tuned speed control, such as industrial processes and high-performance machinery.

These methods provide different ways to control the speed of AC motors, allowing for flexibility and adaptability in various applications. The choice of speed control mechanism depends on factors such as the motor type, desired speed range, accuracy requirements, efficiency considerations, and cost constraints.

China best AC Automatic Door Operators Section Industrial Door Motor   with Good quality China best AC Automatic Door Operators Section Industrial Door Motor   with Good quality
editor by CX 2024-05-06