CN2857325Y

CN2857325Y - Permanent-magnet moment servo dynamo

Info

Publication number: CN2857325Y
Application number: CNU2005201404850U
Authority: CN
Inventors: 李春涛; 范晓斌; 周林; 孟冬根
Original assignee: Haian Shenling Electrical Appliance Manufacturing Co Ltd
Current assignee: Haian Shenling Electrical Appliance Manufacturing Co Ltd
Priority date: 2005-12-30
Filing date: 2005-12-30
Publication date: 2007-01-10
Anticipated expiration: 2015-12-30

Abstract

The utility model discloses the permanent magnetic moment servo motor, which includes the enclosure and stator installed around the internal cavity of the enclosure. The stator is formed by several pieces of arc-shape stator blocks in a circle. Each stator block is formed by several identical iron core sheets welded together by multi-pass welding. The magnetic poles of various stator blocks have rotor windings. A rotation shaft is installed in the middle of the internal cavity of the enclosure. Rotary transformer and rotor corresponding to above stator are installed on the rotating shaft. The rotor is formed by ring-shape iron core, and permanent magnet cambered outwards with magnetic pole opposite to that of the stator is installed one external surface of the rotor. The rotor binds with the permanent magnet through adhesive agent. The rotary transformer is connected to control device. The size of various stator blocks is small with high utilization rate of materials and low cost. Outside surface of the rotor adopts permanent magnet, thus idle work exciting current is unnecessary, there is no resistant loss during operation. The efficiency of this motor is higher than that of motors of same size by 2-8%. The signal collection of rotation shaft angle of this motor is accomplished by the rotary transformer installed inside the enclosure, its signal processing is separated from the detection, can work under adverse environment.

Description

The permanent magnetic torque servomotor

Technical field

The utility model relates to a kind of motor that permanent magnet is arranged, relate to a kind of permanent magnet synchronous AC motor of controlled excitation concretely.

Technical background

As everyone knows, having a kind of is efficient permanent magnet synchronous motor, and it directly is connected with power frequency supply, need the self-starting ability, be mainly used in and require energy-efficient and do not require the occasion of speed governing, its advantage is not have the rotor resistance loss when stable operation, motor delivery efficiency height.Also having a kind of is the brushless ac servomotor, it links to each other with the inverter supply power supply, be mainly used in the occasion that requires speed governing, the rotor of this motor and stator all are wound with coil windings, the direct current that changes in the rotor magnetic pole winding increases or reduces, the output voltage of controlling motor just increases or reduces, and magnetic field control is more convenient.For example: Digit Control Machine Tool, robot, electric motor car, elevator, household electrical appliance etc.Yet, the stator of above-mentioned motor is that the silicon steel sheet of identical stack constitutes, it is to be shaped through stamping machine Integratively stamping-out, every silicon steel sheet is a slice integral body, therefore, adopt whole stamping-out be shaped die needed, equipment requirements is higher, and the silicon steel material utilance is low, its core can not utilize, and is wasted; Next is position and the mensuration of speed and the spreading out of of signal thereof when rotating of above-mentioned motor, needs with special position finding and signal output apparatus, its complex structure, poor reliability, and manufacturing cost height usually.

Summary of the invention

In order to overcome the technical problem that existing brushless, permanently AC servomotor exists, the utility model provides a kind of permanent magnetic torque servomotor, this servomotor is the stock utilization height not only, simple in structure, cost is low, and the position signalling of output motor rotation stably, realize tracking and control easily to motor.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of permanent magnetic torque servomotor, it comprises shell, stator is housed around the shell inner cavity, stator by plurality of sections arc stator block around forming, each stator block is formed by some identical core stamping laminations, be wound with stator winding on the magnetic pole on each stator block, rotating shaft is housed in the middle of the shell inner cavity, be equipped with in the rotating shaft resolver and with the corresponding rotor of said stator, rotor is made of annular core, its outer surface is equipped with the cambered outwards permanent magnet relative with magnetic pole on the stator, and rotor and permanent magnet are bonding by bonding agent, and resolver is connected to control device.

Above-mentioned control device comprises PWM inverter, current/voltage detector and PWM controller, the signal resolution device that links to each other with rectifier, the PWM inverter is connected with PWM controller, current/voltage detector respectively, the current/voltage detector also is connected with the PWM controller, the PWM controller also is connected with the signal resolution device, and the signal resolution device is connected with above-mentioned resolver.

Said stator by four sections arc stator blocks around forming.

It is as follows that permanent magnetic torque servomotor of the present utility model has advantage compared with prior art: the stator of this machine adopts by plurality of sections arc stator block around forming, not only can be with stator center a big chunk waste of material, and because of stator punching little, press forming die is simpler, required pressing equipment requires also lower, stock utilization improves, and manufacturing cost reduces; Its outer surface of the rotor of this machine adopts permanent magnet, do not need idle exciting current, can improve power factor (PF) significantly, reduce stator current and stator resistance loss, and when stable operation, do not have the rotor resistance loss, thereby make the efficient raising 2--8% of the efficient of this machine than the induction motor of same specification; The collection of the angle position signal of the real-time tracking machine shaft of this machine is finished by the resolver that is contained in its shell, the signal resolution device separates with resolver, both prevented the pollution of etchant gas, dust greasy dirt, be not afraid of vibration again, can under adverse circumstances, work, and controlled drive mechanism simple in structure is the simplest.

Description of drawings

Fig. 1 is the structural representation of permanent magnetic torque servomotor of the present utility model;

Fig. 2 is an A-A cross-sectional schematic among Fig. 1;

Fig. 3 is the structural representation of stator 21 among Fig. 1;

Fig. 4 is a permanent magnetic torque servomotor electrical block diagram.

Embodiment

Below in conjunction with drawings and Examples permanent magnetic torque servomotor of the present utility model is described further.

Permanent magnetic torque servomotor as Figure 1-3, it comprises shell 1, stator 2 is housed around shell 1 inner chamber, stator 2 by plurality of sections arc stator block 21 around forming, each stator block 21 is formed by some identical core stamping laminations, be wound with stator winding 22 on the magnetic pole on each stator block 21, rotating shaft 3 is housed in the middle of shell 1 inner chamber, be equipped with in the rotating shaft 3 resolver 4 and with said stator 2 corresponding rotors 5, rotor 5 is made of annular core, its outer surface is equipped with the cambered outwards permanent magnet 6 relative with magnetic pole on the stator 2, and rotor and permanent magnet 6 are bonding by bonding agent, and resolver 4 is connected to control device 7.

As shown in Figure 4, above-mentioned control device 7 comprises PWM inverter 71, current/voltage detector 72 and PWM controller 73, the signal resolution device 74 that links to each other with rectifier, PWM inverter 71 is connected with PWM controller 73, current/voltage detector 72 respectively, current/voltage detector 72 also is connected with PWM controller 73, PWM controller 73 also is connected with signal resolution device 74, and signal resolution device 74 is connected with above-mentioned resolver 4.Said PWM is the abbreviation of Pulse wide Modulation, i.e. pulse-width modulation, and described PWM inverter 71 is the devices that direct voltage can be become sequence of voltage pulses and then be processed into the required alternating voltage of motor.Described PWM controller 73 is that cycle of the voltage pulse width of control inverter output as required and pulse train is to reach the device of variable voltage variable frequency purpose.

Said stator 2 by four sections arc stator blocks 21 around forming.

When the permanent magnetic torque servomotor moves, three-phase alternating current is carried direct current through rectifier to PWM inverter 71, through PWM inverter 71 to current/voltage detector 72, the permanent magnetic torque servomotor provides variable frequency power supply, rotating shaft 3 rotations on the permanent magnetic torque servomotor, current/voltage detector 72 feeds back to PWM controller 73 with the current and voltage signals that detects, meanwhile, be contained in resolver 4 in the rotating shaft 3 and detect the angular signal of the rotating shaft 3 of permanent magnetic torque servomotor, carry the angular signal of rotating shaft 3 to signal resolution device 74, signal resolution device 74 these signals strengthen amplification and carry to PWM controller 73 the conversion back, the electric current and voltage feedback signal of the motor input that shaft rotary corner position signalling that PWM controller 73 provides according to signal resolution device 74 and current/voltage detector 72 provide, the formula of being finished by inside is to PWM inverter 71 output instruction signals, PWM inverter 71 is imported suitable sinusoidal ac according to the instruction of PWM controller 73 to the stator winding 22 of permanent magnet torque motor, realizes the closed-loop adjustment to permanent magnetic torque servomotor angle position and speed.

Claims

1, a kind of permanent magnetic torque servomotor, it is characterized in that: it comprises shell (1), stator (2) is housed around shell (1) inner chamber, stator (2) by plurality of sections arc stator block (21) around forming, each stator block (21) is formed by some identical core stamping laminations, be wound with stator winding (22) on the magnetic pole on each stator block (21), rotating shaft (3) is housed in the middle of shell (1) inner chamber, be equipped with in the rotating shaft (3) resolver (4) and with the corresponding rotor of said stator (2) (5), rotor (5) is made of annular core, its outer surface is equipped with stator (2) and goes up the relative cambered outwards permanent magnet (6) of magnetic pole, rotor and permanent magnet (6) are bonding by bonding agent, and resolver (4) is connected to control device (7).

2, permanent magnetic torque servomotor according to claim 1, it is characterized in that: above-mentioned control device (7) comprises PWM inverter (71), current/voltage detector (72) and PWM controller (73), the signal resolution device (74) that links to each other with rectifier, PWM inverter (71) is connected with PWM controller (73), current/voltage detector (72) respectively, current/voltage detector (72) also is connected with PWM controller (73), PWM controller (73) also is connected with signal resolution device (74), and signal resolution device (74) is connected with above-mentioned resolver (4).

3, permanent magnetic torque servomotor according to claim 1 and 2 is characterized in that: said stator (2) by four sections arc stator blocks (21) around forming.