Tag: difference between

Optical fiber is a flexible transparent fiber made of extruded glass or plastic, slightly thicker than human hair. Optical fiber is the most commonly used means for transmitting light at both ends, and it is widely used in optical fiber communications. Optical fiber has longer transmission distance and higher bandwidth than wired cable. An optical fiber is usually composed of a transparent core with a low refractive index and a transparent cladding material. As an optical waveguide, the optical fiber causes total reflection of light in the core.

Induction motor for sale, also known as "asynchronous motor", is a device that puts the rotor in a rotating magnetic field and obtains a rotating torque under the action of the rotating magnetic field, so that the rotor rotates. The rotor of an induction motor is a rotatable conductor, usually in the shape of a squirrel cage. According to the type of alternating current, there are single phase induction motors and Three phase induction motors. So what is the difference between them? This is mainly reflected in the following aspects.

When a single phase induction motor is working, it will involve the problems of start capacitor and run capacitor. Because single phase is different from three phase, a single phase motor cannot form a rotating magnetic field when it is started, and uses the characteristic of the current in the capacitor to generate a rotating magnetic field to start the motor. Therefore, the start capacitor in a single phase motor is essential. But the run capacitor is not necessary.

In terms of usage, the servo motor is mainly responsible for the feed of the machine tool, making the workpiece move to the tool or the tool move to the workpiece, mainly to realize the work of cutting, with higher requirements for torque and control accuracy; while the spindle motor is mainly responsible for driving the spindle of the machine tool, driving the workpiece or the tool head to rotate, with higher requirements for constant power characteristic output to meet the sufficient torque output capability at different speeds. Therefore, when designing, these two motors will make targeted parameter optimization according to their application requirements respectively.

First of all, in terms of flexibility, drag chains are more flexible than ordinary cables. Although the monofilament diameter of the drag chain cable conductor is small, in order to protect the conductor, an insulating material with resistance to mechanical fatigue and a certain strength must be selected. The requirements of tensile resistance, bending resistance, strong wear resistance, anti-blocking, and high toughness also determine that the protective cover material should also have a certain degree of hardness. Therefore, the flexibility of the drag chain is high flexibility, not high flexibility.

Safety switch is a switch that prevents people from entering a dangerous area before all safety conditions are met. Also it is a device that monitors current in various applications. Safety switches can be used in major equipment applications (conveyor belts, production line equipment, heavy equipment) and electrical protection of whole system. The safety switch works by monitoring the current and detecting electrical faults, which means that in case of leakage, short circuit, overload, the safety switch will cut off the power supply of the faulty system almost immediately (within a few milliseconds).

Soft starter is a novel motor control device which integrates soft start, soft stop, light load energy saving and multiple protection functions. Its main structure is a three-phase anti parallel thyristor and its electronic control circuit connected in series between the power supply and the control...

The servo motor can make the speed and position control accuracy become very accurate, and can convert the voltage signal into torque and speed to drive the control object. The speed of the servo motor rotor is controlled by the input signal and can react quickly. In automatic control systems, servo motors can be used as actuators. Servo motor has the characteristics of small electromechanical time constant and high linearity, and it can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It can be divided into two categories: DC and AC servo motors. Its main feature is that there is no autorotation when the signal voltage is zero, and the speed decreases at a uniform speed with the increase of torque.

Simply put, LCR meter measures the characteristic parameters of separate components, such as resistance value, capacitance value, etc. It generally needs to be tested independently after power failure. Multimeter is a multifunctional measuring instrument. It can test separate components, electrical signal characteristics, and has some other measurement functions.

LCR meter is a special measuring tool used to measure the characteristic parameters of electrical components. L refers to inductance, C refers to capacitance, and R refers to resistance. In addition, the LCR meter cannot be used to measure other parameters. Moreover, the inductance, resistance or capacitance must be measured when the circuit is powered off. Because it is a dedicated instrument, the measurement accuracy is high.

Brushless dc motor
The brushless DC motor is composed of a motor body and a brushless motor driver. It is a typical mechatronics product. Because the brushless DC motor runs in a self-control mode, it will not add a start winding to the rotor like a synchronous motor started under heavy load under variable frequency speed regulation, nor will it cause oscillation and loss of step when the load changes suddenly. The permanent magnets of small and medium-capacity brushless DC motors now mostly use high magnetic energy level rare earth neodymium iron boron (Nd-Fe-B) materials.

Stepper motor
A stepper motor is a motor that converts electrical pulse signals into corresponding angular or linear displacements. Every time a pulse signal is input, the rotor rotates an angle or moves forward. The output angular displacement or linear displacement is proportional to the number of input pulses, and the speed is proportional to the pulse frequency. Therefore, the stepper motor can be called the pulse motor.

Working Principle of BLDC Motor
The BLDC motor is mainly composed of the motor body, position sensor, electronic commutation circuit and driver. The motor body is similar in structure to a permanent magnet synchronous motor, but it has neither cage windings nor other starting devices. The stator windings are generally made into multiple phases (three-phase, four-phase, five-phase and so on). The rotor is composed of permanent magnet steel according to a certain number of pole pairs (2p=2, 4...). In a brushless DC motor, the armature winding is arranged on the stator, and the permanent magnet poles are arranged on the rotor. The position of the armature winding of each phase of the stator relative to the magnetic field of the permanent magnet of the rotor is sensed by the rotor position sensor electronically or electromagnetically. Moreover, it uses its output signal to drive the corresponding power switch transistor connected with the armature winding through an electronic conversion circuit according to a certain logic program, and commutate the current switch to the corresponding armature winding. With the rotation of the rotor, the rotor position sensor continuously sends out signals, causing the armature winding to be continuously energized in sequence, and the energization state is constantly changed. As a result, the direction of the current flowing in the coil conductor under a certain magnetic pole is always the same, and the rotor keeps running.

As an important form of energy generation, air compressors are widely used in various industrial fields, including mechanical, metallurgy, Electronic power, medicine, packaging, chemicals, food, textile, transportation and so on.
Direct drive of air compressor refers to the motor main shaft to drive the rotor by the coupling and the gearbox speed, which is not actually a direct drive in practical sense.
Direct drive in the true sense means that the motor is directly connected with the rotor (Coaxial), which has the same speed. This situation is obviously very rare. Therefore, it is a wrong view that there is no energy loss in direct drive.
Another drive way is belt driven, which allows the rotating speed of the rotor to be changed by pulleys of different diameters.

As a relatively safe transformer in the power industry, isolation transformer has been widely used in electronic industry or industrial and mining enterprises, machine tools and mechanical equipment in general circuit control power supply, safety lighting and indicator power. Due to its excellent product performance, isolation transformer has been used in more fields and scope, and may gradually replace the ordinary transformer. What's the difference? The following is a simple analysis of the main differences between the isolation transformer and the ordinary transformer.

Although three-phase isolation transformers and single-phase isolation transformers are different types of step-up & step-down isolation transformer products, they all have very similar functions and can be used for converting voltage and current, safe isolation and voltage regulation, and play a very important role in many professional fields. However, there are significant differences between them.

People found that the air conditioner also has a little dehumidification function in the process of using the air conditioner. Nowadays, air-conditioning manufacturers have deliberately added a dehumidification mode based on the two modes of cooling and heating to increase the selling point of air-conditioning. However, consumers still have many doubts about whether to buy air conditioners or dehumidifiers. So which one is more cost-effective to buy a dehumidifier or an air conditioner with dehumidification?

Industrial camera can be divided into interlaced scanning industrial cameras and progressive scanning industrial camera according to scanning mode.
Most displays and industrial cameras adopt the interlaced scanning, but it actually looks like a smooth image in human eyes. Industrial cameras usually get odd rows of images first, for CCIR standard, industrial cameras get the even rows after 1/50 seconds, but for EIA standard, the industrial cameras get the even rows after 1/60 seconds.

The instrument transformers like current transformer and potential transformer (also called voltage transformer) are both used for measuring devices, which have a similar working principle to transformers. The current transformer can reduce the high current to low current, while the potential transformer steps down the high voltage to low voltage for measuring the circuit or in the power distribution. They both separate the measurement circuit from the high-voltage grid to protect safety of the personnel.

Relays and transistors have a similar basic function, that is, both play roles of electronic switches. However, relays and transistors are very different from each other. Now let’s take a quick peek at the differences between relays and transistors.

What is the frequency converter? Frequency converter outputs the AC power to pure sine wave after the transformation of AC→DC→AC, the output frequency and voltage can be adjusted within a certain range. It is different from the variable frequency drive (VFD) used for motor speed regulation, and also different from the common AC regulated power supply. An ideal AC power supply is characterized by stable frequency, stable voltage, zero internal resistance and pure sinusoidal voltage waveform (without distortion). Frequency converter is quite close to the ideal AC power supply, so more and more countries use it as standard power supply to provide the best power supply environment for electrical appliances, so as to assess the technical performance of electrical appliances.

Image sensor is an important part of the industrial camera. According to difference of the original, it can be divided into CCD and CMOS sensors. In the last 25 years of the last century, CCD technology has been leading the trend of the imaging sensor. It is a high-resolution and high-quality image sensor which can be integrated on a very small chip. However, in recent years, with the rapid development of the semiconductor manufacturing technology, the size of the integrated transistor is becoming smaller and smaller, and the performance is much better. CMOS image sensor obtains rapid development in the recent years, and it seems CMOS image sensor has overtaken CCD image sensor. CMOS provides the performance on a par with CCD in the mid-end and low-end applications, and has a significant advantage in price. With the development of technology, CMOS will also occupy a space in the high-end application field. This paper makes a detailed explanation to the difference between CCD and CMOS image sensors in the industrial camera.