1 Introduction With the development of variable frequency speed control technology and people's improvement of the quality of domestic water, the variable frequency constant pressure water supply system has replaced the traditional water supply system and has been widely used in residential water systems. At present, most domestic enterprises still use the traditional constant pressure pump to switch the pressurized water supply mode, the water pressure is unstable, and energy is wasted....
The variable frequency motor mainly relies on the electronic circuit composed of semiconductor components to drive the motor to operate. Among them, the MCU digital control technology is good for the motor efficiency; while the MCU control technology is becoming more and more mature, coupled with the FOC algorithm, the inverter motor Efficiency will gradually leap forward. The motor is an indispensable power component in home appliances, and the amount of motor used is also one of the...
On March 3, Siemens supplied the variable frequency power supply for ship shore power system engineering for Yantian International Container Terminal Co., Ltd. (Yantian International YICT) successfully passed the acceptance and was officially delivered. Two sets of new mobile shore power sources newly built in the Yantian International shore power ship project can provide shore power to ships of two berths at the same time, and can cover five berths to provide ship shore power supply...
DP is currently the most widely used bus system in Europe and the world. It is a high-speed, low-cost bus for device-level control systems and distributed I/O communication. It is simple to install, has a variety of topologies, is easy to implement redundancy, real-time communication is reliable, and its functions are perfect. Its excellent performance makes it suitable for various industrial automation fields. The Profibus protocol conforms to the open system reference model of ISO/OSI. For...
In recent years, with the increasing maturity of frequency conversion speed regulation technology, its remarkable energy-saving effect and reliable and stable control mode have been widely used in water supply systems. The variable frequency constant pressure water supply system implements stepless speed regulation on the pump motor. According to the water consumption and water pressure change, the microcomputer detects and calculates, automatically changes the pump speed to keep the water...
The servo motor and variable frequency drive (VFD) usually consist of two parts - the motor itself and the controller that drives the motor (also called the amplifier, servo drive or inverter), and the controller and the motor are connected by cables. The controller receives power from the alternating current. The servo motor has a feedback circuit that maintains a high-precision specific position. This means that the servo motor is still active even without motion. Variable frequency drives...
The first 48-pulse dry-type rectified variable frequency speed-regulating transformer developed by TBEA Xinjiang Transformer Factory Box Change Co., Ltd. was qualified for one-time test, and sent to the user! The product model is ZTSGSF-1250/10, the high voltage coil voltage level is 10kV, and the low voltage coil consists of 24 sets of phase shifting windings. The key technical parameters of the product, such as the phase shift angle error of the secondary side variable winding, The voltage...
As people's quality of life improves, as well as the need for energy efficiency and equipment life, these methods will gradually be eliminated. Therefore, the development of fully automatic variable frequency speed control constant pressure water supply system has received more and more attention and favor. Aiming at the problem of high-rise building water supply, the PLC is used as the central control unit, combined with the inverter, pump motor and control circuit to form a closed-loop...
In recent years, radio terminals have been equipped with a plurality of radio communication systems, and the multi-function represented by smart phones has been continuously developed. Since the frequency bands used by various radio communication systems are different, the antennas must be prepared separately. In order to assemble a plurality of antennas in a limited space in a mobile phone terminal, the antenna is required to be miniaturized. The antenna is designed according to the frequency...
The digital display recorder variable frequency flow can be debugged. The pump has the following functions: The device has the following functions: pressure remote control, automatic boost pressure, automatic pressure compensation, manual gradient boost, remote automatic pressure relief, variable frequency variable flow control and The test process is monitored in real time using computer background software directly. Digital display recorder variable frequency flow can debug pump The digital...
Recently, Dajing Pump Industrial Co., Ltd. of Taiwan developed a new generation of horizontal multi-stage centrifugal pump and computer variable frequency constant pressure pump, which has the characteristics of no rust, water and power failure protection and voltage regulation, which improves the noise of traditional cast iron pump. Defects such as rust. The company's pump products have been in high market share for many years, and most of the past products are mainly in the home market....
Construction principle of variable frequency motor The speed control and control of the motor is one of the basic technologies of various types of machinery and office and industrial and electrical equipment in industry and agriculture. With the amazing development of power electronics technology and microelectronic technology, the AC speed regulation mode of “special frequency induction induction motor + frequency converter” is leading a new place in the field of speed regulation with its...
Frequency conversion earth grounding resistance tester performance characteristics and technology frequency conversion earth grounding resistance tester performance characteristics 1. The measured power frequency equivalence is good. The test current waveform is a sine wave, and the frequency is only 5 Hz from the power frequency, and is measured using two frequencies of 45 Hz and 55 Hz. 2. Strong anti-interference ability. The instrument adopts the different frequency method to measure, and...
The main technical parameters and configuration of Beit 600 tons computerized variable frequency speed control stabilized soil mixing station. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
MOS power IC full range Probe domestic high frequency needle JKT-50L high frequency needle with 3 probes Test - lowercase jpg Kaixin micro test Overview: Starting from the application requirements of the real-time measurement of the variable-frequency power supply parameters, the FPGA and DSP are the hardware cores for the wide frequency range of the variable-frequency power supply. A data acquisition and calculation system based on variable step size adaptive sampling method is designed. The...
7050 OSC seed vibration MOS power IC full range Probe high frequency needle JTK-50L-Q has 5 needles in the high frequency needle Shunluo high frequency inductor, parallel stack inductor, shun winding inductor, authorized agent Overview: With the development of electronic technology, advanced developed countries are increasingly using variable frequency power supply as a standard power supply to provide the best power supply environment for electrical appliances, to facilitate objective...
Quincy Compressor has released the QSV series of innovative variable frequency screw vacuum pumps in the vacuum technology field, which significantly improves customer productivity. The new QSV205-110 (5.5-37kW) variable frequency screw vacuum pump series can achieve energy savings of approximately 50% compared to conventional vacuum pumps. The leading technical features of Quincy QSV series provide more vacuum solutions for customers in various industries, representing a substantial...
The maintenance method of the variable frequency motor is basically the same as that of the ordinary motor. However, due to the particularity of the variable frequency power supply, the winding insulation of the variable frequency motor is stricter than that of the ordinary motor. Therefore, Dalan Motor recommends that you take the following measures to improve the maintenance of the inverter motor. The method is basically the same as the ordinary motor, but due to the particularity of the...
Want to know the difference between a variable frequency motor and a normal motor? First of all, to understand what is the inverter? What are the classifications of the inverter? What is the working principle of the inverter? Want to know the difference between a variable frequency motor and a normal motor? First of all, to understand what is the inverter? What are the classifications of the inverter? What is the working principle of the inverter? Dalan Motor Xiaobian made the following...
What is a variable frequency motor? Dalan Motor tells you that the variable frequency motor actually uses the principle of motor control to control the motor through a so-called inverter. Common variable frequency motors include: three-phase asynchronous motor, DC brushless motor, AC brushless motor and switched reluctance motor. The control principle of the variable frequency motor mainly includes: constant torque control at the base speed, constant power control above the base speed, and weak...
MOS power IC full range Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ The correct selection of the variable frequency power supply is crucial for the normal operation of the electronic control system of the mechanical equipment. To select the variable frequency power supply, firstly, according to the type of mechanical equipment, load torque characteristics, speed regulation...
MOS power IC full range Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ Abstract: The system design for collecting AC voltage and load current signals using the built-in ADC of HCNR200 and TMS320F2812 is described in detail. The HCNR200 is a high precision linear optocoupler specifically designed for analog signal isolation sampling. Its use can effectively isolate the main...
MOS power IC full range KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ According to market demand and customer requirements, the following suggestions are proposed for the purchase of variable frequency power supply: 1. Order according to the size of the company 2, according to the needs of enterprises to order according to the needs of enterprise products, the purpose of purchasing instruments is to ensure that the quality of the company's own products are...
What is the difference between a frequency converter and a soft starter? Frequency converter: definition: An inverter that converts alternating current with constant voltage and frequency into alternating current with variable voltage and frequency is called a frequency converter. effect: Reduce the impact load caused by the motor starting, control the motor speed, lengthen the starting time, smooth the current, achieve the purpose of soft start, and improve the efficiency of the grid and...
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