CN202190243U

CN202190243U - Series wound motor

Info

Publication number: CN202190243U
Application number: CN2011202331867U
Authority: CN
Inventors: 杨昌良
Original assignee: Individual
Current assignee: Guangdong Rui Electric Co Ltd
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2012-04-11
Anticipated expiration: 2021-07-04

Abstract

The utility model relates to a series wound motor, comprising a magnetic ring, a motor shaft, a hall sensor and a main control chip. The series wound motor is characterized in that the magnetic ring is in coaxial arrangement with the motor shaft and runs synchronously along with the motor shaft, the hall sensor detects a magnetic signal during the running process of the magnetic ring and transmits the signal to the main control chip via a circuit, and the main control chip controls and opens the phase of a switch tube according to the received signal number. The utility model also relates to a series wound motor in which a raster is used to replace the hall sensor. By using the series wound motor, and employing a rotating speed negative feedback, the motor torque is compensated, and the zero load noise of a motor class product is reduced.

Description

Series excited machine

Technical field

The utility model relates to the smart circuit of series excited machine rotating speed; This circuit extensively model applies to dough kneading machine, juice extractor, electronic type of small household appliances such as mincer and angle grinding machine, electric drill, husky turbine, intelligent electric instruments such as polishing machine.

Background technology

It is low that series excited machine has price. and load capacity is strong, and power to volume ratio is big, accomplishes the high power small size easily, is easy to advantage with the working machine coupling, is widely used in all kinds of small household appliances to reach in the electric tool as power source.But itself has defective series excited machine: the rotating speed high noisy is also high when unloaded, and it is unhurried feeble to become again during loading, and efficient is low, and heating is fast, and motor is just heat protection very soon; Of prodigious strength again when improving behind the working point stall, be easy to cause transmission mechanism to damage, such steady strong far away from the capacitive AC motor.And no matter needs speed regulating control occasion, be that ring or tap control are transferred in open loop if generally being adopted controllable silicon copped wave open loop speed governing and tap speed governing, be prerequisite to sacrifice moment of torsion all, so slow-speed of revolution moment is very little, and speed adjustable range is also wide inadequately.

Summary of the invention

In view of above content, be necessary to provide a kind of and can adopt the rotating speed negative feedback, to have solved the defective of above-mentioned series excited machine, promote Motor torque, reduce the series excited machine of noise and spark.

The utility model provides a kind of series excited machine; Comprise magnet ring (perhaps grating), motor shaft, Hall element (perhaps photoelectric sensor), master control chip, wherein, said magnet ring and the coaxial setting of motor shaft (perhaps said grating and the coaxial setting of motor shaft); Magnet ring (perhaps grating) and motor coaxle setting; Along with motor shaft run-in synchronism,, send signal to the master control chip through circuit simultaneously when magnet ring Hall element in operation process constantly detects magnetic signal; The master control chip is a foundation with the number of signals that receives, and the phase place of switching tube is opened in control.

Main circuit adopts high-power cmos switch pipe, thereby reaches adjusting motor speed purpose through cutting AC sine wave change motor terminal voltage; Control circuit adopts the magnet ring of radial magnetizing and Hall element to carry out the rotating speed sampling, through the phase place of circuit controling switch pipe, increases rotating speed like load and descends, and phase place is then controlled motor terminal voltage and risen in advance, and motor torsion increases, and rotating speed is unlikely to descend too many; Rise like load decline motor speed, phase lag, motor terminal voltage descends, and motor torsion reduces, and the control rotating speed can not rise too much; Set minimum speed middle the adding, and too big like motor load, motor speed is lower than the minimum of setting; Motor just can cut off the power supply immediately; Reach overload protection, re-power the back protection and remove, control circuit itself just has the permanent rotating speed of adjustable-speed, promotes moment of torsion, reduces noise, falls spark.

Than prior art, the utlity model has following advantage:

1, the utility model adopts the rotating speed negative feedback, has compensated Motor torque, has reduced noise and spark;

2, through magnet ring (perhaps grating), Hall element (perhaps photoelectric sensor) and control chip are set, reach the motor constant speed and rotate, it is more steady to have a machine in operation.

Description of drawings

Combine embodiment that the utility model is done further to describe with reference to the accompanying drawings.

Fig. 1 is the schematic appearance of the utility model series excited machine embodiment 1.

Fig. 2 is the schematic appearance of the utility model series excited machine embodiment 2.

Embodiment

See also Fig. 1, the utility model embodiment 1 a kind of series excited machine is provided, comprise magnet ring, motor shaft, Hall element, master control chip; Wherein, magnet ring and motor coaxle setting are along with motor shaft run-in synchronism; When magnet ring Hall element in operation process constantly detects magnetic signal; Send signal to the master control chip through circuit simultaneously, the master control chip is a foundation with the number of signals that receives, and the phase place of switching tube is opened in control.

Series excited machine 1 in the course of the work; Magnet ring 3 is along with motor shaft 2 run-in synchronisms; When magnet ring 3 Hall element 4 in operation process constantly detects magnetic signal, Hall element is when detecting magnetic signal, to send signal to master control chip 6 through circuit, and master control chip 6 is a foundation through the number of signals that receives each second; The phase place of switching tube is opened in control, reaches the purpose of motor constant speed.The dynamo-electric machine of going here and there also comprises conventional switchboard 5 and pcb board 7.

Present embodiment 2 is for to replace with grating 8 with the magnet ring among the embodiment 1, and the Hall element among the embodiment 1 replaces with photoelectric sensor 9, and all the other are identical with embodiment 1.

Operation principle is; Series excited machine 1 in the course of the work, grating 8 is along with motor shaft 2 run-in synchronisms, when grating 8 photoelectric sensor 9 in operation process constantly detects light signal; Photoelectric sensor 9 is when detecting light signal, to send signal to master control chip 6 through circuit; Master control chip 6 is a foundation through the number of signals that receives each second, and the phase place of switching tube is opened in control, reaches the purpose of motor constant speed.

The utility model is primarily aimed at the improvement that series excited machine carries out; The above is merely the utility model preferred embodiment; Non-so signals collecting that promptly limit to claim, particularly magnet ring and the Hall element of the utility model makes up available grating and the infrared photoelectric sensor group replaces entirely, should belong in the utility model interest field; So the simple and easy variation and the equivalent transformation of doing with the utility model specification and graphic content such as all should be contained in the claim of the utility model.

Claims

1. series excited machine; Comprise magnet ring, motor shaft, Hall element, master control chip, it is characterized in that: said magnet ring and the coaxial setting of motor shaft, said magnet ring is along with said motor shaft run-in synchronism; When said magnet ring detects magnetic signal at Hall element described in the operation process; Send signal to said master control chip through circuit simultaneously, said master control chip is a foundation with the number of signals that receives, and the phase place of switching tube is opened in control.

2. series excited machine; Comprise grating, motor shaft, photoelectric sensor, master control chip, it is characterized in that: said grating and the coaxial setting of motor shaft, said grating is along with said motor shaft run-in synchronism; When said grating detects light signal at photoelectric sensor described in the operation process; Send signal to said master control chip through circuit simultaneously, said master control chip is a foundation with the number of signals that receives, and the phase place of switching tube is opened in control.