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Dc motor（direct current machine）It is able to convert direct current energy into mechanical energy（Direct current motor）Or convert mechanical energy into direct current energy（Dc generator）Rotary motor。It is a motor that can convert direct current energy and mechanical energy into each other。It is a DC motor when it is operated as a motor，Convert electrical energy into mechanical energy；It is a DC generator when operating as a generator，Convert mechanical energy into electrical energy。 Constituent structure： The structure of the DC motor should be composed of two parts: stator and rotor。The stationary part of a DC motor is called the stator，The main function of the stator is to generate a magnetic field，Following stand、Main pole、Commutating pole、End cover、Bearing and brush device, etc。The part that turns during operation is called the rotor，Its main function is to produce electromagnetic torque and induced electromotive force，It is the hub of DC motor for energy conversion，So its often called an armature
Permanent magnet synchronous motorIt is a synchronous motor that generates a synchronous rotating magnetic field excited by a permanent magnet，The permanent magnet acts as a rotor to generate a rotating magnetic field，Three-phase stator winding reacts through armature under the action of rotating magnetic field，Induced three-phase symmetrical current。 At this time the kinetic energy of the rotor is converted into electrical energy，Permanent magnet synchronous motor as generator(generator)with；In addition，When the stator side passes a three-phase symmetrical current，Because the three phase stator is different in space position120，So the three-phase stator current creates a rotating magnetic field in space，The rotor is moved by the electromagnetic force in the rotating magnetic field，This converts electrical energy into kinetic energy，Permanent magnet synchronous motor as motor(motor)with。
Packing method of electronic connector An electronic cable is one of the components that connects an electrical line，A complete connector product is generally designed、Manufacturing and packaging/Assembling three processes。What are the main materials？I believe many people do not understand it very well，The following Feng Ye Xiaobian will take you to understand what its production materials are！
nskDeep groove ball bearing uses NSKDeep groove ball bearing is a kind of high performance bearing produced in Japan，It is characterized by low friction resistance，High speed of revolution，It can be used on parts bearing radial loads or combined loads acting simultaneously in both radial and axial directions，It can also be used on parts that bear axial loads，It is a kind of rolling bearing widely used。The following Feng Ye Xiaobian will take you to understand its maintenance and use。
Vapor pressure sensor is mainly used to measure the flow of medium fluid in industrial pipeline,gassiness、liquid、Vapors and other media。It is characterized by low pressure loss,Large range,High precision,It is almost independent of fluid density when measuring the volume flow rate under working conditions、stress、temperature、The influence of viscosity and other parameters。No moving mechanical parts，Therefore, high reliability,Low maintenance。
Current sensor definition and precautions
Distributed optical fiber sensor is a unique distributed optical fiber detection technology，Sensors that measure or monitor spatial distribution and time-varying information along the transmission path of an optical fiber。It arranges the sensing fiber along the field，The spatial distribution and time change information of the measured field can be obtained simultaneously，There are many attractions for many industrial applications。
1.High transmission efficiency： In the ball screw pairIn the，The free-rolling ball transfers force and motion between the screw and the nut。This transmission mode replaces the direct action mode between the screw and the nut of the traditional threaded lead screw pair，Therefore, the sliding friction of the traditional lead screw is replaced by minimal rolling friction，The transmission efficiency of ball screw pair is achieved90%above，The driving torque of the entire transmission pair is reduced to that of the sliding screw1/3around，As a result, the heat rate is greatly reduced。 2.High positioning accuracy： Low heating rate of ball screw pair，The temperature rise is small, and the lead screw is pre-stretched and pre-tightened to eliminate axial clearance during processing，The lead screw pair has high positioning accuracy and repeated positioning accuracy。 3.Transmission reversibility： Ball screw pairs have no sliding screw viscous friction，The crawling phenomenon that may occur in the transmission
1. Dc motorThere are three ways to speed up：1Is to change the voltage at both ends of the motor，2Its changing the magnetic flux，3It is a string regulating resistor。 2. Changing voltage speed regulation is a common method，Use pulse controlPWMmethod，The input varies with the square wave of different duty cycles，Change the voltage at both ends of the input DC motor armature，Change the DC motor speed，Realize speed control function，It can realize stepless speed regulation，It belongs to constant torque speed regulation。The problem with this speed regulation is that it can generally only be adjusted below the rated speed；Changing flux，Speed regulation by weak magnetic field，It can realize stepless speed regulation，The disadvantage is that it can only be adjusted above the rated speed，Governing timeU、Iinvariability，It belongs to constant power speed regulation；A series regulation resistor is an adjustable resistor in series outside the armature circuitR0，passR0magnify/Reduced change resistanceR+R0To achieve speed co
Connector classification Connector we commonly known as connector、Plug and socket。Generally refers to electrical connectors。A device that connects two active devices，Transmit current or signal。There are three main types of connectors，The following Feng Ye Xiaobian will take you to understand what are the three kinds。 Connector classification：
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