CN2452199Y

CN2452199Y - Large low-speed torque permasyn motor

Info

Publication number: CN2452199Y
Application number: CN 00252877
Authority: CN
Inventors: 唐任远; 徐衍亮; 赵丹群
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2000-11-16
Filing date: 2000-11-16
Publication date: 2001-10-03
Anticipated expiration: 2010-11-16

Abstract

The utility model relates to a large low-speed torque permasyn motor, which comprises a machine seat, and a rotor and a stator assembled on the machine seat. A stator winding uses two suits of identical three-phase windings, and the input end and the output end of the two suits of windings are respectively connected in parallel or in series. The utility model has the advantage that the low speed torque of the motor can be evidently raised under the condition of not needing mechanical retarder or adding inverter capacity, and ensuring high driving power.

Description

Big low speed torque permagnetic synchronous motor

The utility model relates to a kind of permagnetic synchronous motor, and particularly a kind of electric motor car drives the very big permagnetic synchronous motor of low speed torque of usefulness.

As everyone knows, permagnetic synchronous motor drives in the application in electric motor car has optimal performance index, is that the ideal that electric motor car drives is selected.But its constant-power speed regulation scope is narrower, makes its low speed torque less, thereby has influence on the low speed climbing capacity and the starting acceleration capacity of electric motor car.The method that improves electric motor car low speed climbing capacity and starting acceleration capacity has two: the first expanded motor electric current, second adopts mechanical reducer, but the former need increase the inverter capacity, system bulk, weight, cost are increased, and the latter is same because the existence of mechanical reducer increases volume, weight, the cost of whole drive system.Be the difficult problem that the assistant officer is to be solved how at the low speed torque that guarantees the motor high speed performance and do not increase raising motor under the prerequisite of inverter capacity, no mechanical decelerator.

The purpose of this utility model provides a kind of big low speed torque permagnetic synchronous motor, and it can be at no mechanical decelerator, need not to increase the inverter capacity and guarantee and significantly improve the low speed torque of motor under the prerequisite of high-speed driving ability.

The purpose of this utility model is achieved in that this device comprises support and assembles rotor and stator on it, and wherein stator winding adopts identical three phase windings of two covers, and the input and the output of two cover windings are connected in parallel respectively or are connected in series.

Because the utility model is improved on the basic structure basis of existing permagnetic synchronous motor, it is conversion stator winding structure pattern only, so be easy to realize.During use, utilize controls such as contactor, relay,, switch the connected mode that stator two overlaps windings, reach the purpose that improves the motor low speed torque by contactor, relay according to the different operating condition of motor.Its mechanism of action is: the output torque of permanent magnet synchronous motor is approximate to be directly proportional with current of electric and umber of turn, therefore when the motor low cruise, with two cover windings of motor by and connect and switch to serial connection, this moment, the motor windings number of turn became and when connecing 2 times, so motor torque becomes winding and when connecing about 2 times.Simultaneously, the motor windings electromotive force is directly proportional with umber of turn and rotating speed, and with the rising of rotating speed, the motor windings electromotive force increases, when the winding electromotive force reaches the ceiling voltage that adds, when weak magnetic, just can not quicken again, therefore during the operation of two windings serial connection owing to the number of turn is many, although torque is big, but the range of speeds of operation is little, must reach when adding maximum voltage at the winding electromotive force to be switched to and connect by serial connection, could realize acceleration again.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is two cover winding and access node structure schematic diagrames in the utility model stator.

Fig. 2 is two cover winding series connection structure schematic diagrames in the utility model stator.

Fig. 3 is the switching of no winding, only runs on and when connecing winding the torque of motor--rotation speed characteristic.

When Fig. 4 switches for winding is arranged, the torque of motor--rotation speed characteristic.

Describe concrete structure of the present utility model in detail according to Fig. 1～2.The support of this device and rotor and the stator assembled on it adopt the structure that has permagnetic synchronous motor now substantially, draw among the figure, only represent the version of stator winding in the accompanying drawings.This stator winding adopts identical three phase windings of two covers, and first cover is A1～X1, B1～Y1, C1～Z1, and second cover is A2～X2, B2～Y2, C2～Z2.The input and the outputs of two cover windings are connected in parallel respectively or are connected in series, and utilize controls such as contactor, relay, according to the different operating condition of motor, by contactor, relay make two cover windings and connect and be connected in series between switch.According to actual instructions for use, two cover windings and connecing when motor needs high-speed cruising, as shown in Figure 1.When the motor low cruise, two cover winding serial connections, as shown in Figure 2.By Fig. 3, as seen Fig. 4 switches by winding, and motor can obtain very big low speed torque T2.Switch as not carrying out winding, its low speed torque only is T1.

Claims

1, a kind of big low speed torque permagnetic synchronous motor, this device comprise support and assemble rotor and stator on it, and wherein stator winding adopts identical three phase windings of two covers, and the input and the output of two cover windings are connected in parallel respectively or are connected in series.