CN86102336A

CN86102336A - The induction machine of no surge start and speed governing

Info

Publication number: CN86102336A
Application number: CN 86102336
Authority: CN
Inventors: 彭三友; 彭志新
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-04-05
Filing date: 1986-04-05
Publication date: 1987-02-11

Abstract

The invention discloses a kind of nothing impact or the starting of little dash current, speed regulating induction motor, be suitable for every profession and trade and use, have nothing impact or little dash current and start, High Power Factor, high-torque, adjustable speed, simple in structure, cancelled traditional advantages such as starting equipment.It realizes starting and speed governing by switch change-over motor induction limit winding connecting mode.When needs startings or low cruise, if through switch motor induction limit partly the coil that lags behind of relative induction electromotive force oppositely and all the other coils series connection of winding, High Power Factor for a long time, high efficiency, greatly moment low cruise; When the whole forwards of winding connect, can under rated condition, work.

Description

The induction machine of no surge start and speed governing

The present invention is a kind of traditional starting equipment that need not, and can not have and impacts or the starting of little dash current and speed governing, and can improve the novel induction machine of induction machine power factor.

Existing induction machine mainly is made of stator winding, rotor winding, magnetic conductive loop and corresponding mechanical supporting device.This induction machine passes into single-phase or during many phase alternating current, can rotate acting when former limit winding.But this induction machine exists starting current big, and power factor is low, and starting torque is little, and is difficult for shortcomings such as speed governing.For reducing starting current to the impact of electrical network, most cases has to use complicated starting equipment, starting torque and power factor are reduced more, when using rotor-resistance starting and speed governing, electric efficiency is greatly reduced, and the shortcoming such as inevitable inrush current still when using pole-changing control also makes electric machine structure be tending towards complicated.The all improvement of few of essence of this situation of a nearly century.

The invention provides a kind of induction machine, it can not have impact or the starting of little impulse current, and bigger starting torque is arranged and near the normal High Power Factor that moves, do not need traditional complicated fully.Expensive starting equipment can carry out the bringing onto load speed governing, also higher power factor can be arranged when underloading is worked, and has kept traditional induction machine simple, firm and to the adaptability of rotating speed, load variations.

The present invention can realize like this: the former limit of induction machine is equipped with symmetric winding, and former limit can be in the motor stator side, also can be in the rotor side.Symmetric winding pass to single-phase or many phase alternating current after, in rotor magnetic conductive loop and air gap, produce rotating excitation field, motor induction limit, or claim time limit winding.Can be placed in accordingly rotor side or stator side with former limit, namely produce the alternation induced potential.Induction limit winding is distributed along motor garden Zhou Yiding scope by many conductors or coil and consists of, therefore custom is called Distributed Winding, its induced potential has certain phase angle difference with its position is relatively different, when motor was in starting or low cruise state, coil or conductor that the induction limit a part of induced potential of winding is relatively lagged behind oppositely partly connected through all the other with it of switch.Before the synthetic induced potential of induction limit each coil of winding is reduced and drawing.The current amplitude on induction limit and former limit is reduced, and power factor improves, and motor torque increases, reach not have to impact or the starting of little dash current and speed governing purpose, and long-term High Power Factor, high efficiency, high-torque ground low cruise; When by switch with the part of reversal connection or when all coil or conductor forward and all the other coils connect, motor can enter specified running status as conventional motors.

To traditional induction machine of having made, can be transformed into the method that extra switch change induction limit winding connects nothing impact of the present invention or the starting of little dash current, buncher.

As one of embodiments of the invention, we can become nothing of the present invention to impact or little dash current start speed regulating motor with the motor reconstruct that inferior limit all is made of coiled wire-wound coil one 880 volts, three-phase, former limit.This motor induction limit (inferior limit) is evenly distributed on the part garden by four coils by 60 ° of electrical angles and consists of a phase winding on week, when starting or low cruise.By switch make a coil lagging behind most oppositely and other three coils connect, three phase windings all connect equally, can under nothing impact or little impulse current, start, and bigger starting torque and power factor arranged, also high efficiency for a long time, big moment, High Power Factor ground low cruise, when the needs high-speed cruising, by corresponding switch the coil of former differential concatenation being changed into the forward series operation can realize.When former limit is loaded on the stator, when the induction limit was loaded on the rotor, switch can be contained on the rotor and rotate with axle.Control signal can be imported through modes such as slip ring or photoelectric couplings, and when the induction limit was loaded on the stator, switch can be contained in the stator side transfixion, and motor power is introduced rotor through slip ring.Switch can constitute with general relay or custom-designed relay, also can realize with the reverse-blocking tetrode thyristor element.

Claims

1, a kind of change responded to the induction machine that limit conductor wiring does not have impact or the starting of little dash current and speed governing, has stator, rotor winding and corresponding magnetic conductive loop and mechanical supporting structure, and the induction limit of motor can be on the stator limit.Also can be on the rotor limit.It is characterized in that responding to the limit winding and can change connecting mode by starting, speed governing and the different needs that improves power factor.

2, by the induction machine of claim 1 regulation, it is characterized by the winding connection of induction limit can be with having contact or noncontacting switch to change on demand connecting mode.Switch can static or rotation arrangement.

3, by claim 1 or 2 induction machines of stipulating.It is characterized by induction limit winding is Distributed Winding, the winding that a part of induced potential in this Distributed Winding relatively lags behind can through switch oppositely or all the other of forward and Distributed Winding partly link.To satisfy starting, speed governing and to improve the needs of power factor.

4, by the induction machine of claim 3 regulation, it is characterized in that to utilize existing induction machine, install switch change-over winding connecting mode additional on its induction limit.Realize not having impact or Shaochong and hit electric current starting and speed governing.