CN1226761A - Electronic brake of motor - Google Patents
Electronic brake of motor Download PDFInfo
- Publication number
- CN1226761A CN1226761A CN 98110660 CN98110660A CN1226761A CN 1226761 A CN1226761 A CN 1226761A CN 98110660 CN98110660 CN 98110660 CN 98110660 A CN98110660 A CN 98110660A CN 1226761 A CN1226761 A CN 1226761A
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- China
- Prior art keywords
- motor
- rotor
- braking
- rotor coil
- loop
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
An electronic brake for electric motor features that a braking circuit which is a group of electronic switches is parallelly connected with the rotor winding. When rotor winding is turned off, its two terminals are shorted to make the rotor winding become reverse voltage loop. When rotor stops, the loop is cut off. Its advantages are quick response, high braking effect, no mechanical friction, long service life, low cost and small size.
Description
The present invention relates to machine field, specifically control the brake of motor stall.
Widely used AC/DC motor in industrial lathe and electric tool.Add in the process at machine, do not allow motor that the inertia rotation is arranged, to guarantee machine finish.Therefore the braking of motor will be a crucial technical problem.Hydraulic frictional braking, the mechanical brakings such as electromagnet-friction braking of adopting on traditional DC electromotor with brush more.When DC motor is when being driven by amplidyne, the braking of the reverse voltage of employing is arranged also.More than various motor brakings all exist volume big, complicated in mechanical structure, the slow-footed drawback of brake response, and cost height should not adopt on the small-sized electric instrument.
The object of the invention is to disclose a kind of electronic brake of motor.Advantages such as it is fast to have reaction speed, and good braking effect does not have mechanical abrasion, is easy to safeguard, the life-span is long, and cost is low, and volume is little.As increase electronic speed-regulating circuit and can replace amplidyne fully, be applied to old machine reformation.
General thought of the present invention is a short circuit rotor coil after rotor has a power failure, and utilizes rotor to produce reverse voltage and produces strong row braking moment to rotor, reaches all standing.
Technical solution of the present invention is, at the rotor coil terminals of motor 1 and connect a braking circuit.Braking circuit is one group of electronic switch, after the rotor coil outage, and rotor coil two terminals short circuits, rotor coil becomes the reverse voltage loop, and after the rotor stall, this loop promptly disconnects.
The present invention is another kind of to be improved and is for high rotating speed direct current machine and exchanges and single-phasely have the motor of brush to be connected in series a current control circuit at the coil of stator of motor input; current of electric reduces several times when on-position, and the stator coil electric current is excessive during with protection rotor short circuit.
Fig. 1 is a principle of the invention block diagram;
Fig. 2 is a most preferred embodiment block diagram of the present invention;
The present invention is after motor 1 rotor has a power failure, do not cut off the power supply as stator, rotor continues to fly to change under effect of inertia, the magnetic line of force in rotor coil cutting stator magnetic field, be generating state, at this moment braking circuit 2 forms the back electromotive force loop directly with the two ends of rotor short circuit, force rotor moment all standing, reach the braking purpose.For high rotating speed direct current machine with exchange single-phase motor, big in order to prevent coil of stator of motor at the braking procedure electric current, by current control circuit 3, make and flow through the motor braking electric current and reduce.
Braking circuit of the present invention adopts controllable silicon electronics non-contact control circuit, is a kind of optimum implementation.
The present invention is specially adapted to rotating speed and uses in 1000 left and right sides machine motors, during the machine tooling workpiece, all is middle low cruise, and the motor braking electric current is very little.During the lathe high-speed cruising, just be used for mobile lathe bed, do not require precision, needn't fast braking, can in stator coils of motor, seal in proper resistor, reduce the motor brake electric current, low speed machining accuracy in so promptly guaranteeing does not influence the lathe high-speed cruising again.The present invention is applied to can replace generally popular friction braking system fully in the machine tool industry.Adding a cover electronic speed-regulating circuit in addition can replace amplidyne fully, realizes old machine reformation.Because the control principle novelty is simple in structure, the volume I realizes braking to the small-sized electric instrument, and this is for the motor speed height, and inertia is big, starts frequent electric tool, and particularly electronic cutting cutlery is particularly important.
Claims (1)
1. electronic brake of motor, at the rotor coil terminals of motor (1) and connect a braking circuit (2), it is characterized in that: braking circuit (2) is one group of electronic switch, constitute by controllable silicon or large power triode non-contact control circuit, after the rotor coil outage, rotor coil two terminals short circuits, rotor coil becomes the reverse voltage loop, after the rotor stall, this loop promptly disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110660 CN1226761A (en) | 1998-02-18 | 1998-02-18 | Electronic brake of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110660 CN1226761A (en) | 1998-02-18 | 1998-02-18 | Electronic brake of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1226761A true CN1226761A (en) | 1999-08-25 |
Family
ID=5220687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110660 Pending CN1226761A (en) | 1998-02-18 | 1998-02-18 | Electronic brake of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1226761A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212652B (en) * | 2006-12-30 | 2012-10-10 | 上海乐金广电电子有限公司 | Recording mode controller for monitoring camera |
| CN113615026A (en) * | 2019-03-19 | 2021-11-05 | 惠普发展公司， 有限责任合伙企业 | Overvoltage protection for motor drives |
-
1998
- 1998-02-18 CN CN 98110660 patent/CN1226761A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212652B (en) * | 2006-12-30 | 2012-10-10 | 上海乐金广电电子有限公司 | Recording mode controller for monitoring camera |
| CN113615026A (en) * | 2019-03-19 | 2021-11-05 | 惠普发展公司， 有限责任合伙企业 | Overvoltage protection for motor drives |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |