Industrial & Scientific

Intelligent motor controlling modules (intelligent motor controlling modules) are phase-shift trigger voltage regulation soft start modules controlled by single microcomputer. It is used for soft start of three-phase AC motor, realizes smooth start of motor, reduces starting power, avoids impact on power grid, and reduces power distribution capacity. Features of the control part of the intelligent motor control module: ? Digital automatic control by single-chip microcomputer. ?It has starting methods such as full voltage start, voltage ramp start, voltage step start, and current limit start. ?The starting voltage is adjustable to ensure the minimum starting torque of the motor to avoid overheating of the motor. ?The starting current can be adjusted according to the load condition, and the best torque can be generated with the smallest current. ? The starting time is adjustable. Within this time range, the motor speed gradually increases to avoid speed impact. ?Free parking and soft parking, the soft parking time is adjustable. ? Various startup parameters input by the user can be saved and will not be lost after shutdown or power failure. ? The five-digit digital tube can display the corresponding current and voltage values. ? It can realize overcurrent protection, overheating protection and phase loss protection. The module structure is shown in Figure 1. It can be seen from Figure 1 that the main circuit of the module, the phase-controlled circuit and the single-chip microcomputer are encapsulated in the same casing, and multiple current and voltage sensors are built in at the same time. The module and the control box are connected together with connectors to realize the setting and display of various functions. Figure 1 Structural diagram of the intelligent motor control module The main circuit is 6 glass passivated square thyristor chips, which are pasted on the dbc (ceramic copper clad plate) through integrated welding technology and welded with the thermal conductive copper plate. When the module is in use, the thermal conductive copper plate and the heat sink are in close contact with the thermal conductive silicone grease. This structure makes the module have high insulation performance and heat dissipation performance. Figure 2 is a block diagram of the electrical principle of the module. The phase-shifting control circuit part is the jp-ssy01 digital phase-shifting integrated circuit independently developed by Yinhe Company. The circuit is packaged in sop28, powered by a single 5v power supply, fully digitally processed, and has high phase-shifting accuracy and symmetry. The phase shift angle can be controlled by adding 0~10v level signal to the control terminal. Figure 2 Block diagram of the electrical principle of the module The synchronous transformer outputs the synchronous signal to the phase-shifting circuit, and the other one is sent to the single-chip microcomputer, which is used as the reference for the single-chip microcomputer to collect voltage and current signals. In this way, the calculation error caused by the change of the frequency of the alternating current is overcome, and the calculation accuracy is improved. Sensors include voltage sensors and current sensors. Hall elements are used in both sensors, which have the characteristics of small size, fast response and high linearity. Through the integrated design with the module structure, they can be conveniently placed inside the module. The two sensors transmit the voltage analog quantity and the current analog quantity to the 12-bit high-speed a/d converter, and through the a/d conversion, the corresponding digital quantity is transmitted to the single-chip microcomputer for processing by the single-chip microcomputer. The display and control parts use serial ports to communicate with the single-chip microcomputer, which greatly reduces the connection between this part and the inside of the module. 5 digital tube display, 8 button control, make the display and control intuitive and convenient.

It is designed for control and adjust the speed of a DC motor. The output of the speed controller is DC which will not damage the governor. The applied voltage is 12V 24V 36V 48V.Features:Control and adjust the speed of a DC motor with this controller.High reliability. High efficiency, high torque, low heat generation.Use soft heat-resistant silicone line.New generation of 9-60V 20A DC Motor Pump Speed Controller.Thickened copper sheet and PCB balanced arrangement of heavy current.Specification:Operating voltage: DC9V-60VQuiescent current: 18APWM duty cycle: 0%-100%Material: Metal amp; Plasticsize: 7.6 * 4.4 * 2.6cm / 2.99 * 1.73 * 1.02in(L * W * H)weight: Approx. 70g / 2.47ozPackage size: 14.8 * 10.9 * 3cm / 5.83 * 4.29 * 1.18in(L * W * H)Package weight: 72g / 2.54ozPackage list:1 * PWM DC Motor Speed Regulator ControllerNote: The package without user manual. We confidently assure you'll be satisfied with what you get.However, If? there's a chance that you are not satisfied with our goods or something else, please let us know before leaving us a Negative feedback. We will try our best for 100% customer satisfaction.?Your 5-Star Positive Feedback is much appreciated to us, and your satisfaction is our greatest motivation to move forward.Welcome to Shop Here! Want more Items? Please come visit our SHOP. *Shipping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 5 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for remote areas,it may take a little longer).Your satisfaction is our first priority.*If you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.

Musical instruments, English: musical instruments, generally refer to the utensils that can play the timbre and rhythm in various ways. Generally divided into national musical instruments and Western musical instruments. A device capable of producing musical sounds and recreating musical art. Humans express and exchange thoughts and feelings by playing musical instruments. On the definition of musical instruments, the music industry and the musical instrumental community have different views. The music industry believes that the sounding instrument used for music is the musical instrument; the musical instrument field usually regards many sounding instruments in non-musical fields, such as the golden drums in ancient wars, the instruments beaten in religious prayers and chanting, weddings and funerals. The ceremonial signals and the signal devices solicited by traders are also regarded as musical instruments, and even some production labor tools and daily life utensils, such as bows, saws, pestles, pots, cups, saucers, cups, bowls, etc., are played. At the time, they were all crowned with the word music, and they were called music bows, music saws, music cups, music pestles, etc. The main products of the musical instrument industry are basically musical instruments involved in the music industry, that is, instruments that can be used to recreate musical art. In addition, a small number of horse bells, camel bells, oil brands and car and ship horns are produced. The production of musical instruments is different from the production of general industrial products. It not only requires the product to have a reasonable and beautiful appearance, but also must have good acoustic quality, including timbre, music and specified pitch height. Therefore, the selection of materials is very strict. Musical instruments are the spiritual property that human beings possessed very early, and are constantly enriched with the progress of human beings. From archaeological excavations, murals, and cliff paintings, it can be seen that hunting and hunting, signal transmission, offering sacrifices to gods, fighting cheers or celebration dances are closely connected with pronunciation tools or rhythmic sounds [1] . There are 3 theories about the development of musical instruments ?The German musical instrumentist C. Sachs analyzed the distribution of the unearthed cultural relics from the archaeological point of view, and believed that the first stage was mainly noise devices such as rattles and whistles; the second stage was drums, horns, and plucked strings; In the third stage, musical instruments such as xylophone and flute appeared. ?The British scholar T.F.R. Ubosam believed that the drums came first, then the flutes, and finally the plucked instruments. ? Austrian music theorist R. Wallacek opposed the idea that music originated from language, and agreed that music originated from rhythm and dance. He believed that the flute and wind instruments were the earliest, and then the singing and drum instruments were formed. In 2010, my country's musical instrument industry was faced with uncertain factors at home and abroad: the continued depreciation of the US and the spread of the debt crisis in the euro zone were still the main reasons affecting the export of musical instruments in my country; In an upward trend, coupled with the soaring CPI index after the second half of the year, the inflation factor has made the musical instrument industry face a more severe test. The profit margins of musical instrument production and sales are shrinking, and my country's musical instrument industry has entered an inflection point. The production of musical instruments only relies on cheap labor and resources, and the extensive economic development method of producing low-cost popular musical instruments has lost its advantages. Major economic indicators rose by double digits year-on-year, a higher rate than in 2009. In 2010, the industrial output value of enterprises above designated size in the musical instrument industry reached 22.079 billion yuan, an increase of 25.82% over 2009, and the industrial sales output value was 21.53 billion yuan, an increase of 22.91% over 2009. Exports of musical instruments have recovered to the best level in history before the financial crisis. In 2010, Chinese musical instruments were exported to 180 countries in the world, and the export value reached 1.467 billion US dollars, a year-on-year increase of 20.48%, and continued to maintain the status of the world's largest exporter. The quality of musical instruments has been further improved, the proportion of medium and high-end musical instruments has increased, and the proportion of OEM musical instruments exported has decreased. The standardization of musical instruments was carried out in an orderly manner. In 2010, 15 standard project plans, 1 national standard, and 14 industrial standards were completed; the review work completed the cleaning, review and revision of 49 standards before 2005. The national standard for "Limits of Harmful Substances in Musical Instruments" concerning human health has been formulated. The standard level of musical instruments formulated during the "Eleventh Five-Year Plan" period has reached or is close to the current technical standards of advanced countries.