Centrifugal pump motor power and current control is introduced

Centrifugal water pump is a common water pump, usually adopt the motor drive, for different motor power, current is also different, how shall we divide the both. Motor ( English: Electricmachinery, commonly known as & other; Motor & throughout; ) Refers to according to the law of electromagnetic induction electrical power conversion or transfer of an electromagnetic device. Motor is in the circuit with the letter M ( Old standards with D) Said that its main role is the driving torque, as with all electrical or mechanical power, generator in circuit by the letter G said that its main role is to use mechanical energy into electrical energy. A, according to the start-up and operation mode can be divided into: capacitor start type single-phase asynchronous motor, capacitor operation type single-phase asynchronous motor, single-phase capacitor start running type asynchronous motor and split-phase single-phase asynchronous motor. Second, according to the running speed can be divided into: high speed motor, motor at low speed, constant speed motor and speed regulating motor. Low speed motor is divided into geared motor, electromagnetic reducer motors, torque motor and claw pole synchronous motor, etc. Three, can be divided according to the use: drive motor and motor control. 1, the drive motor can be divided into: electric tools ( Including drilling, polishing, grinding, slotting, cutting, reaming tools etc. ) Motor, household appliances, Including washing machines, electric fans, refrigerators, air conditioner, tape recorder, video recorder, VCD, vacuum cleaner, camera, hair dryer, electric shaver, etc. ) General motor and other small machinery and equipment ( Including all kinds of small machine tools, small machinery, medical equipment, electronic instruments, etc. ) Motor. 2, control motor divided again: stepping motor and servo motor, etc. Four, according to the working power supply varieties division: can be divided into dc motor and ac motor. 1, according to the structure and working principle of the dc motor can be divided into: brushless dc motor and brushless dc motor. 2, the ac motor can also be divided: single-phase motor and three-phase motors. Five, according to the structure and working principle can be divided into: can be divided into direct current motor, asynchronous motor, synchronous motor. 1, the synchronous motor can be divided into: permanent magnet synchronous motor, synchronous motor and magnetic resistance hysteresis synchronous motor. 2, the asynchronous motor can be divided into: ac induction motor and motor commutator. Six, according to the structure of the rotor can be divided into: cage induction motor ( The old standard called squirrel-cage asynchronous motor) And wound rotor induction motor, The old standard called wound asynchronous motor) 。 The working principle of dc generator alternating emf is induced in the armature coils, the commutator with brush commutation function, make it from the brush end into the principle of dc electromotive force. The direction of induction electromotive force according to the right-hand rule to determine ( Magnetic induction line point to palm, thumb conductor movement direction, the other four refers to the point to is the direction of induction electromotive force in the conductor) 。 With the left hand rule to determine the conductor stress direction. This pair of electromagnetic force formed on the armature a torque, the torque in rotary motor is called electromagnetic torque, torque direction is counterclockwise, trying to make the armature counterclockwise rotation. If the electromagnetic torque can overcome the armature resistance torque ( For example, caused by friction resistance torque and other load torque) The armature can spin counterclockwise direction. Dc motor is the motor run on dc voltage, widely used in the tape recorder, video recorder, VCD, electric shavers, hair dryer, digital watches, toys, etc.
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