CN220273536U

CN220273536U - Novel controller for double-winding pole-changing motor

Info

Publication number: CN220273536U
Application number: CN202321912186.9U
Authority: CN
Inventors: 赵刚
Original assignee: Jieshi Hoisting Machinery Shanghai Co ltd
Current assignee: Jieshi Hoisting Machinery Shanghai Co ltd
Priority date: 2023-07-20
Filing date: 2023-07-20
Publication date: 2023-12-29
Anticipated expiration: 2033-07-20

Abstract

The utility model discloses a novel controller for a double-winding pole-changing motor, which comprises L1, L2, L3 and a three-phase cage type asynchronous motor, wherein the L1, L2 and L3 are sequentially connected with the three-phase cage type asynchronous motor in series through a breaker QS, a resistor FU1 and a contactor KM, the FU1 on a circuit of the L1 is sequentially connected with the FU2, a thermal relay FR and the button switch SB1 in series through an ammeter, the FU1 on the circuit of the L2 is sequentially connected with the FU2, the contactor KM and the button switch SB2 in series, and a contactor KM is connected in parallel with a circuit point between the contactor KM and the button switch SB1 and a circuit point between the button switch SB 2. Compared with the prior art, the utility model has the advantages that: can improve the service life, can improve the security, facilitate the use.

Description

Novel controller for double-winding pole-changing motor

Technical Field

The utility model relates to the technical field of double-winding variable-stage motor controllers, in particular to a novel controller for a double-winding variable-stage motor.

Background

The double-winding variable-stage motor is widely applied in the field of cranes, the electric hoist is a special lifting device, a stator of the double-winding variable-stage motor is provided with an A/B set of windings, the pole numbers of each set of windings are different, the common A winding is 2 poles, the B winding is 8 poles, when the A winding is connected with 3/380V, the rotating speed of a rotor can be close to 3000 rpm, when the B winding is connected with 3/380V, the rotating speed of the rotor is close to 750 rpm, namely, the double-winding motor has 2 rotating speeds by one motor, in the process of actually using the electric hoist, the electric hoist can quickly approach to a target at high speed, save time, and accurately position and improve accuracy by slow speed, so that the electric hoist has two speeds.

The existing control mode of the pole-changing motor is to combine 4 contactors with transformers, and utilize buttons to remotely control forward rotation/reverse rotation and fast/slow speed of the motor, the existing control mode is to switch on/off a power circuit through the closing/pulling action of mechanical contacts of the contactors, but a hoisting motor belongs to electrical equipment with larger inductance, when a power supply is cut off, the mechanical contacts of the contactors are separated, an arc is generated between the contacts, if the switch is frequent, the arc which is frequently generated can generate high temperature, the mechanical contacts are easy to burn, even the mechanical contacts are likely to adhere and be welded, so that the contactors are damaged, the motor is extremely easy to cause the motor to be short, if the motor is short-circuited, the current is very large, even the short circuit is almost generated, so that the motor is easy to burn, even fire is caused, frequent checking and replacement of new contactors are needed in order to avoid the occurrence of the situation, and meanwhile, the maintenance cost is improved, and the production efficiency is reduced.

Disclosure of Invention

The technical problem to be solved by the utility model is to overcome the technical defects, and provide a novel controller for a double-winding pole-changing motor, which can prolong the service life, improve the safety and facilitate the use.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a novel a controller for duplex winding pole-changing motor, includes L1, L2, L3 and three-phase cage type asynchronous motor, L1, L2, L3 loop through circuit breaker QS, resistance FU1 and contactor KM and three-phase cage type asynchronous motor series connection, FU1 on the circuit of L1 passes through the ampere meter and establishes ties with FU2, thermal relay FR and button switch SB1 in proper order, FU1 on the circuit of L2 establishes ties with FU2, contactor KM and button switch SB2 in proper order, the circuit point between contactor KM and the button switch SB2 and the circuit point between button switch SB1 and the button switch SB2 parallelly connected has contactor KM.

Compared with the prior art, the utility model has the advantages that: 1. the silicon controlled rectifier is used for replacing three contactors of positive and negative rotation and pole change, and has no closing/pulling action of a mechanical contact, so that the service life is long; 2. the external 380V power supply reaches the motor after being controlled after passing through the contactor, and the contactor is reset after power failure when accidents happen, so that the total power supply can be cut off, and the safety can be improved; 3. the 24V voltage provided by the DC24V direct current power supply module is low voltage, so that the human body is not damaged in a fatal way, the short circuit can be caused when the overload occurs, the automatic suspension can be realized, the self-recovery can be realized, and the safety can be improved; the portable electric wire connector is small in size, light in weight and convenient to carry, a user can replace the portable electric wire connector by himself when maintenance is needed, the wiring terminals are standardized, and the portable electric wire connector is simple in site wiring operation and convenient to use.

Drawings

Fig. 1 is a circuit diagram of a novel controller for a dual winding pole-changing motor of the present utility model.

Fig. 2 is a control wiring diagram of a novel controller for a double winding pole-changing motor of the present utility model.

Fig. 3 is a plan view of a novel contactor for a controller for a dual winding pole-changing motor in accordance with the present utility model.

Fig. 4 is a general plan view of a novel controller for a dual winding pole-changing motor according to the present utility model.

Fig. 5 is a plan view of a DC24V direct current power module of a novel controller for a dual winding pole-changing motor of the present utility model.

Fig. 6 is a novel thyristor circuit board for a controller of a dual winding pole-changing motor of the utility model.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The utility model provides a novel a controller for duplex winding pole-changing motor, includes L1, L2, L3 and three-phase cage type asynchronous motor, L1, L2, L3 loop through circuit breaker QS, resistance FU1 and contactor KM and three-phase cage type asynchronous motor series connection, FU1 on the circuit of L1 passes through the ampere meter and establishes ties with FU2, thermal relay FR and button switch SB1 in proper order, FU1 on the circuit of L2 establishes ties with FU2, contactor KM and button switch SB2 in proper order, the circuit point between contactor KM and the button switch SB2 and the circuit point between button switch SB1 and the button switch SB2 parallelly connected has contactor KM.

When the circuit is required to be started, the push button switch SB2 is specifically pressed down, the normally open contact is recovered to be disconnected, the contactor KM is in a suction state, the normally open auxiliary contact is still closed, the control circuit is kept to be connected, so that the contactor KM continues to be electrified, when the pulse generator detects that the length of the contact line to be cut reaches a preset value, the pulse generator G is electrified, the motor M realizes operation, the cutting mechanism cuts the contact line, when the length of the contact line to be cut does not reach the preset value, the pulse generator G is not electrified, the motor M does not operate, and when the push button switch SB1 is specifically pressed down, the self-locking contact of the contactor KM is disconnected when the control circuit is disconnected, the contactor KM is also in a disconnection state, and the motor M cannot rotate.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. A novel controller for a double winding pole-changing motor, characterized in that: including L1, L2, L3 and three-phase cage type asynchronous motor, L1, L2, L3 loop through circuit breaker QS, resistance FU1 and contactor KM and three-phase cage type asynchronous motor establish ties, FU1 on L1's the circuit is established ties with FU2, thermal relay FR and button switch SB1 in proper order through the ampere meter, FU1 on L2's the circuit is established ties with FU2, contactor KM and button switch SB2 in proper order, the circuit point between contactor KM and the button switch SB2 has contactor KM with the circuit point between button switch SB1 and the button switch SB2 parallelly connected.