Motor for Air Compressor
Zhejiang Meizhoubao: Your Professional Air Compressor Motor Manufacturer!
Zhejiang Meizhoubao Industrial & Commercial Co.,Ltd. is one of the air compressor manufacturers in China that produces all kinds of air compressors. We are a modern enterprise combining with research, development, manufacture and trading. Meanwhile we have leading-edge workshop, leading-edge production assembling lines, precise testing equipments and skilled staffs.
Rich Experience
Founded in 2003, our company has 20 years experience in air compressor and 15 years OEM experience for more then 100 clients around the world.
Professional R&D Capability
There are professional R&D teams and independent research and development under the leadership of human resources such as Professor Xu Shiwei from the School of Mechanical and Vehicle Engineering of Hunan University and doctoral supervisor.
Integrated Team
Our company is an enterprise integrating production, scientific research, production, domestic and foreign trade and warehousing. The company team has sales center, foreign trade department, domestic sales department, R&D center, production department and after-sales department.
Strong Production Capacity
Our company has produced 1 million air compressors annually, with more than 200 product models. The products sell well all over the country and are exported to more than 60 countries and regions in the world.
Complete Qualifications
Our company designs and manufactures high quality products with 12 R&D engineers. We have CE, CCC, ISO9001, ROHS certificate and so on.
An air compressor motor provides power to the compressor head. In turn, the compressor head compresses and forces quantities of air either into the storage tank or directly through an airline. Essentially, the compressor motor is like the heart of an air compressor. An air compressor without a motor is like a car without an engine. Although there are numerous types of air compressors on the market, the majority of compressors still have three basic components: the motor, the head, and the storage tank.
Working Principle of Motor for Air Compressor
The basic components of a motor are a rotor and a stator. The rotor is the part in the middle of a motor that rotates, while the stator is attached to the motor's body and does not move. The rotor and stator contain coils that generate a magnetic field when current is applied, attracting and repelling each other depending on the direction of the current, making the rotor turn and delivering mechanical power.
Common Types of Motor for Air Compressor
Synchronous Motor
The working of the synchronous motor mainly depends on the 3-phase supply. The stator in the electric motor generates the field current which rotates in a stable speed based on the AC frequency. As well as the rotor depends on the similar speed of the stator current. There is no air gap among the speed of stator current and rotor. When the rotation accuracy level is high, then these motors are applicable in automation, robotics, etc. Please refer to this link to know more about synchronous motor types and applications.
Induction Motor
The electric motor which runs asynchronous speed is known as induction motor, and an alternate name of this motor is the asynchronous motor. Induction motor mainly uses electromagnetic induction for changing the energy from electric to mechanical. Based on the rotor construction, these motors are classified into two types namely squirrel cage & phase wound.
Stepper Motor
The stepper motor can be used to offer step angle revolution, as an alternative to stable revolution. We know that for any rotor, the whole revolution angle is 180degrees. However, in a stepper motor, the complete revolution angle can be separated in numerous steps like 10 degree X 18 steps. This means, in a total revolution cycle the rotor will go stepwise eighteen times, every time 10 degree. Stepper motors are applicable in plotters, circuit fabrication, process control tools, usual movement generators, etc.
Brushless DC Motor
The brushless DC motors were first developed for achieving superior performance within a lesser space than brushed DC motors. These motors are lesser when compared with AC models. A controller is embedded into the electric motor to facilitate the process within the lack of a commutator and a slip ring.
Hysteresis Motor
The operation of the hysteresis motor is extremely unique. The rotor of this motor can be induced hysteresis and eddy current to generate the required task. The motor working can depend on the construction, 1-phase supply otherwise 3-phase supply. These motors give a very smooth process with stable speed, similar to other synchronous motors. The noise level of this motor is quite small, due to this reason they are applicable in numerous complicated applications wherever the soundproof motor is used such as sound player, audio recorder, etc.
Reluctance Motor
Basically, reluctance motor is a 1-phase synchronous motor & this motor construction is quite same with induction motor like cage type. The rotor in the motor is like squirrel cage type & the stator of the motor include sets of windings such as auxiliary and main winding. The auxiliary winding is very useful at the beginning time of the motor. As they offer a level operation at a stable speed. These motors are commonly used in synchronization applications which include signal generators, recorders, etc.
Universal Motor
This is a special kind of motor and this motor works on single AC supply otherwise DC supply. Universal motors are series wound where the field and armature windings are connected in series and thus generates high starting torque. These motors are mainly designed for operating at high-speed above 3500 rpm. They utilize AC supply at low-speed and DC supply of similar voltage.
Types of Single Phase Induction Motors for Air Compressor
Split-phase Induction Motor
The split-phase induction motor is also known as a resistance-start motor. It consists of a single-cage rotor, and its stator has two windings: the main winding and a starting (also known as an auxiliary) winding. Both the windings are displaced by 90° in space like the windings in a two-phase induction motor. The main winding of the induction motor has very low resistance and high inductive reactance.
Capacitor-start Motor
The capacitor-start motor develops a much higher starting torque, i.e. 3.0 to 4.5 times the full-load torque.To obtain a high starting torque, the value of the starting capacitor must be large, and the resistance of starting winding must be low. Because of the high VAr rating of the capacitor required, electrolytic capacitors of the order of 250 µF are used. The capacitor Cs is short-time rated.
These motors are more costly than split-phase motors because of the additional cost of the capacitor.
Permanent-split Capacitor (PSC) Motor
These motors have a cage rotor, and its rotor consists of two windings namely, the main winding and the auxiliary winding. The single-phase induction motor has only one capacitor C which is connected in series with the starting winding. The capacitor C is permanently connected in series with the starting winding. The capacitor C is permanently connected in the circuit at starting and running conditions.
Shaded Pole Motor
A shaded-pole motor is a simple type of self-starting single-phase induction motor. It consists of a stator and a cage-type rotor. The stator is made up of salient poles. Each pole is slotted on the side, and a copper ring is fitted on the smaller part. This part is called the shaded pole. The ring is usually a single-turn coil and is known as shading coil.
Types of Three Phase Motors for Air Compressor
Squirrel Cage Motors
A three phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. It is called a ‘squirrel cage’ motor because the rotor inside of it – known as a ‘squirrel cage rotor’ – looks like a squirrel cage.
This rotor is a cylinder of steel laminations, with highly conductive metal (typically aluminum or copper) embedded into its surface. When an alternating current is run through the stator windings, a rotating magnetic field is produced.
This induces a current in the rotor winding, which produces its own magnetic field. The interaction of the magnetic fields produced by the stator and rotor windings produces a torque on the squirrel cage rotor.
One big advantage of a squirrel cage motor is how easily you can change its speed-torque characteristics. This can be done by simply adjusting the shape of the bars in the rotor. Squirrel cage induction motors are used a lot in industry – as they are reliable, self-starting, and easy to adjust.
Slip-Ring or Wound Rotor Induction Motor
Slip-ring Induction Motor are generally called wound rotor motor. The rotor is made up of a tube-shaped center with slots on the outside edges. The rotor winding is placed inside the slots. In this type of rotor, the winding is arranged in such a way that the number of rotor winding slots matches the number of stator winding poles. The rotor winding can be related as a star or delta. The slip-rings are connected to the end terminals of the rotor windings. As a result, it is referred to as a slip-ring induction motor engine. The external block can without a doubt interact with the rotor circuit through the slip-ring and brushes. Likewise, it is uncommonly useful for controlling the speed of the motor and dealing with the starting force of the three-phase Induction Motor.
Advantages of Motor for Air Compressor
Single Phase Motor
Lightweight, Compact Unit
As the transmission voltage is high, the current through the line will be less. This means that the conductor can be quite lightweight and compact in size, which also results in the supporting tower becoming lighter. The unit is, overall, quite a portable one.
Efficient Transmission
Another result of the low current is that the I2R losses are reduced. This means that the efficiency of the transmission increases, ensuring that the unit operates at its optimum.
Less Substations Required
Another result of the I2R reduction is that the distance between the two substations can be increased. This means that fewer substations are required for these systems. The substations can also be located near to the high voltage grid, which reduces the initial cost of transmission.
Three Phase Motor
Efficiency and Durability
They are highly efficient and require minimal maintenance due to the lack of brushes, commutators, or slip rings.
Robustness
They are extremely robust, withstanding overloads, voltage fluctuations, and operating conditions that may damage other motor types.
Cost-Effective
They have a low cost of production compared to other motors of similar capacity.
High Torque: They provide a high starting torque, which is beneficial in applications like lifts, pumps, and locomotives.
Tips for Choosing a Motor for Air Compressor
Understand Your Application
Before delving into the details of air compressor motors, it's crucial to thoroughly evaluate your application requirements. Consider important factors like:
The type of air compressor being powered.
How often you will use your air compressor equipment.
Environmental conditions (such as temperature and humidity).
Any limitations in power consumption.
This initial assessment will guide you towards the best motor choice that perfectly suits your specific needs.
Determine What Type Of Air Compressor Motor You Need
Air compressor motors come in various types, including single-phase and three-phase motors, as well as different horsepower ratings. Understanding the differences between these types is critical for selecting the right motor. Single-phase motors are suitable for smaller, intermittent use applications, while three-phase motors are better suited for continuous, high-demand operations. Horsepower ratings define optimum operating horsepower and engine revolutions per minute, which affect engine life and reliability.
Factor In Efficiency And Energy Savings
Energy efficiency is a significant consideration when choosing any electric motor. Efficiency has an impact on operating costs over time.For air compressors, high efficiency motors will reduce overall energy waste and extend the lifespan of your equipment.
Think About Durability And Reliability
In industrial settings, downtime equals losses. An air compressor motor's durability and reliability are crucial. Factors like motor construction, protection against environmental elements (like dust and moisture), and warranty coverage ensure long-term performance.
Maintenance of Motor for Air Compressor
Proper lubrication. Premature motor failure can occur with both too much and too little lubrication. Check the manufacturer’s specifications. When adding new grease, let the motor run for an hour without the drain plug to purge excess grease from the motor without damaging windings and other parts.
Keep passageways free of debris. Up 80-90% of the electrical energy used by a compressed air distribution system and its motor is converted to heat. All air passages, piping, and cooling fins should be clean and free of debris, or that heat cannot entirely dissipate, which could spell low inefficiency and even danger.
If applicable: adjust V-belts on electric motors. Tension adjustments are needed about every 400 hours of operation, as regular use can stretch and cause wear on belts. If the belt is too tight, it causes excess wear on bearings; too loose and you lose energy efficiency. Make sure whoever is adjusting the belt knows its sweet spot for tension.
Record when inspections and maintenance were completed. Record everything! Not only is this best practice to look good for third-party inspections and keeping up with industry standards, it allows you to rest easy knowing you’re not wasting time on an inspection or repair someone just completed the day before. Accurate records save you time, money, and headaches.
Make time for quick check-ins between routine cleanings and maintenance. Even if you follow best practices for the time between equipment inspections and maintenance, things can go wrong between check-ups. Take a tiny bit of time periodically to do a quick once-over of your equipment and catch any issues early.
FAQ
Q: What is a motor for air compressor?
Q: What is an induction motor for air compressor?
Q: What is single phase induction motor for air compressor?
Q: What is the working principle of single phase motor for air compressor?
Q: What is compressor duty motor?
Q: What is the advantage of single phase induction motor for air compressor?
Q: What are the main types of single phase motor for air compressor?
Q: What are the constraints of single phase motor for air compressor?
As the system voltage is quite high, you will find that the cost of insulation is quite expensive. Insulation depends on the voltage of the unit, whilst the size of the wire will depend on the current. So, whilst the motor will run quite efficiently, it will be costly to insulate.
Not Uniform Torque
The torque obtained by these units is not uniform, like that obtained by three phase and even DC motors. This is a result of the frequency and can affect operation quality.
Cannot Handle Overload
These units cannot handle much overload, whereas DC models can handle a lot of overload quite easily. On occasion they have been known to run slow, overheat, or even fail to start, overheat or run slow.
Q: What is three phase induction motor for air compressor?
Q: What are the main types of three phase motor for air compressor?
Q: What are the benefits of using a three phase motor for air compressor?
It requires less maintenance.
It has high efficiency and good power factor.
It is less expensive.
It has self-starting torque.
Q: Are there any constraints of three phase motor for air compressor?
3-phase induction motors have poor starting torque and high inrush currents (about 4 to 8 times of the rated current).
They always operate under lagging power factor and during light loads, they operate at very worst power factor (about 0.3 to 0.5 lagging).
Q: What is the difference between single phase and three phase motor?
Single phase motors have a similar construction to the three phase motor, including an AC winding that is placed on the stator, and short-circuited conductors that are placed in a cylindrical rotor. The biggest difference between the two motors is that with a single phase motor, there is only one phase supply to the stator.
Q: How does a three phase motor for air compressor work?
Q: How do I determine the correct size of an air compressor motor?
Q: How do I know if my air compressor motor is overheating?
Q: What is the recommended RPM for an air compressor motor?
Q: What is the advantage of squirrel cage induction motor for air compressor?
Squirrel cage motors have a basic and hearty turn of events, making them smooth and solid.
Low Maintenance
There are fewer parts that are susceptible to wear and maintenance issues because the rotor is a closed cage with no external connections.
High Starting Torque
In situations where high starting torque is required, squirrel cage motors frequently exhibit excellent characteristics.
Q: What is the advantage of slip-ring or wound rotor induction motor for air compressor?
One of the main advantages of slip-ring motors is the ability to control the speed and power by moving the external block related with the rotor windings. Because of this, they are suitable for applications that require variable speed.
High Starting Torque Control
Slip-ring motors can give high starting torque, and the external devices can be changed as per control the starting torque.
Smooth Acceleration
The ability to control the rotor resistance results in less mechanical pressure during starting and a smoother speed increase.
Q: How to maintain a motor for air compressor?Clean motor of any dust or oil.
Check oil level in bearings.
Visually check for oil and grease from bearings.
Technician to examine the starter switch, fuses and tighten loose connection.
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