CN1825746A - Series electric machine with electric braking function - Google Patents
Series electric machine with electric braking function Download PDFInfo
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- CN1825746A CN1825746A CN 200610039416 CN200610039416A CN1825746A CN 1825746 A CN1825746 A CN 1825746A CN 200610039416 CN200610039416 CN 200610039416 CN 200610039416 A CN200610039416 A CN 200610039416A CN 1825746 A CN1825746 A CN 1825746A
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- armature
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- brake
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Abstract
This invention relates to a series excited machine with an electric braking function including an excitation winding and an armature serial to the excitation winding, a power cut-off backing switch, a brake resistor and a delay control device, in which, the power cut-off backing switch cuts off the power to back the two ends of the excitation winding or the armature to be delayed by the delay control device then serial to the braking resistor to form a braking loop with the excitation winding and the armature, which rotates to generate braking current generating brake moment to brake the motor.
Description
Technical field
The present invention relates to a kind of series excited machine, especially a kind of series excited machine with electric braking function.
Background technology
Series excited machine is widely used on the motor machines such as pruner, chain saw, annular saw, hay mover, sanding machine, because effect of inertia, these electromechanical workpieces also have quite long run duration behind deenergization, this motion of workpiece might be to operator or other artificial one-tenth personal injury, therefore cut off the electricity supply behind the voltage brake motor and workpiece rapidly, be very important to eliminate safe hidden trouble, therefore on the product safety of the many countries regulation clear and definite requirement arranged.
Utilizing mechanical brake device to brake series-wound motor is technique known, spring friction plate structure for example, the resistance of friction plate makes motor brake, clearly mechanical brake device have complex structure, cost an arm and a leg, shortcoming easy to wear, spring also can make brake fade because high annealing causes flexibility decrease, so its applicability is relatively poor.
Electric braking has and does not have wearing and tearing, advantage of simple structure, after the series excited machine outage, known electric braking method is to utilize motor residual magnetic induction self-excitation short-circuit braking, as the disclosed technology of German patent DE 3802419A1, the series excitation winding is by the diode reverse of polarity of two reverse parallel connections, after motor outage and the short circuit, because remanent magnetism effect, produce induced current immediately in armature, induced current produces the braking moment with the armature direction of rotation, thereby realizes braking.This electric braking method can produce very big spark when existing maximum shortcoming to be exactly braking on brush, reach three grades through testing this spark, burns commutator and brush, thus shortening motor useful life, and other shortcoming is that braking time is uncontrollable.
Summary of the invention
A main purpose of the present invention is the shortcoming that overcomes above-mentioned motor braking, and a kind of series excited machine with electric braking function is provided, and it is less to produce spark during this motor braking on the brush, and steadily rapidly, braking time is controlled in braking.
Another main purpose of the present invention is to reduce braking member, reduces manufacturing cost, improves the applicability of braking circuit on the different capacity series excited machine.
The object of the present invention is achieved like this, a kind of series excited machine with electric braking function, this motor comprises field winding, armature, field winding and armature are connected in series, it is characterized in that also comprising outage reversal connection switch, brake resistance and overrun control, outage reversal connection switch is cut off the electricity supply and with field winding or the reversal connection of armature two ends, after the overrun control time-delay, series connection inserts brake resistance, field winding, armature, brake resistance series connection is connected form brake circuit.Overrun control comprises diode, relay, electric capacity, diode and relay series connection, and electric capacity and relay parallel connection, overrun control is connected with power supply, disconnects brake circuit when power connection, and brake circuit is connected in time-delay after power supply disconnects.Outage reversal connection switch is the multitool commutator, and wherein a cutter is a mains switch, and all the other cutter two contacts are connected with field winding or armature two ends respectively, and back reversal connection field winding or armature are used to cut off the power supply.
Compare with prior art, brake circuit was connected in time-delay after usefulness of the present invention was power cut-off, and the serial connection brake resistance, had reduced the spark on the brush greatly.Transient process when its reason is the inductive circuit switching, can produce very big surge voltage of short time, magnetic field energy in the field winding is the strongest simultaneously, the armature rotating speed is the highest, at this time the circuit short circuit is braked, will inevitably produce strong spark, burn commutator and brush, shorten electrical machinery life.Brake circuit is connected in the time-delay back can avoid surge voltage, and magnetic field energy, the armature speed attenuation in the field winding reduced induced electromotive force simultaneously, further is connected in series brake resistance, reduces stalling current, thereby has reached the purpose that suppresses spark on the brush.
Compare with prior art, another usefulness of the present invention is to reach the adjusting braking time by regulating overrun control and brake resistance, makes the smooth-going purpose of braking.
Compare with prior art, another usefulness of the present invention is to realize electric braking with less elements, and cost is lower.
Usefulness in addition of the present invention is the reference time delay that overrun control can have broad, can be fit to electric mechanical brake use high-power or that have big moment of inertia.
Description of drawings
Fig. 1 specific embodiment 1 reversal connection field winding motor circuit figure.
Fig. 2 specific embodiment 2 reversal connection electric motor with armature circuit diagrams.
Fig. 3 prior art has electric braking function motor circuit figure.
Embodiment
As shown in Figure 1, field winding 1,2 are connected in series, the reversal connection switch 4 that opens circuit is double-point double-throw switchs, wherein a cutter 4b is as mains switch, another cutter 4a common port and armature 3 series connection, two contacts respectively with the series connection field winding 1,2 two ends link, overrun control 10 diodes 5, relay 6, filter capacitor 7, electrochemical capacitor 8 is formed, diode 5 and relay 6 are connected in series, filter capacitor 7, electrochemical capacitor 8 and relay 6 are connected in parallel, and overrun control 10 is connected with power supply, when power connection, relay 6 normally opened contact 6a closures, normally-closed contact 6b disconnects, and power supply is to electrochemical capacitor 8 chargings, after power supply disconnects, electrochemical capacitor 8 is to relay 6 power supplies, when voltage was lower than the resetting voltage of relay 6 on the electrochemical capacitor 8, relay 6 normally-closed contact 6b closures were with brake resistance 9 and armature 3 series connection.
In this embodiment, when a cutter 4b energized of the reversal connection switch 4 that opens circuit, another cutter 4a makes 3 series connection of field winding 1, field winding 2, armature, and relay 6 normally-closed contact 6b disconnect and make the brake resistance 9 can not place in circuit, and at this moment motor is in normal operation; When a cutter 4b deenergization of the reversal connection switch 4 that opens circuit, another cutter 4a is with field winding 1, the 2 two ends reversal connections of series connection, after the relay 6 normally-closed contact 6b timing closings of overrun control 10 controls, series connection inserts brake resistance 9, make field winding 1, field winding 2, armature 3, brake resistance 9 series connection connect and form brake circuit, because armature 3 effects of remanent magnetism and rotation, in armature 3, produce induced current immediately, induced current produces the braking moment with armature 3 direction of rotation, thereby realizes braking.Normally-closed contact 6b timing closing, brake circuit is connected in time-delay, effectively avoided producing when inductive circuit switches surge voltage, magnetic field energy, armature 3 speed attenuations in the while field winding, reduced induced electromotive force, further serial connection brake resistance 9 reduces stalling current, thereby has reached the purpose that suppresses spark on the brush.
As shown in Figure 2, outage reversal connection switch 4 to armature 3 two ends reversal connections, has reached the braking effect with embodiment 1 equivalence among the embodiment 2 when braking.
Claims (3)
1. series excited machine with electric braking function, this motor comprises field winding, armature, field winding and armature are connected in series, it is characterized in that also comprising outage reversal connection switch, brake resistance and overrun control, outage reversal connection switch is cut off the electricity supply and with field winding or the reversal connection of armature two ends, after the overrun control time-delay, series connection inserts brake resistance, field winding, armature, brake resistance series connection is connected form brake circuit.
2. series excited machine according to claim 1, it is characterized in that overrun control comprises diode, relay, electric capacity, diode and relay series connection, electric capacity and relay parallel connection, overrun control is connected with power supply, disconnect brake circuit when power connection, brake circuit is connected in time-delay after power supply disconnects.
3. series excited machine according to claim 1, the reversal connection switch that it is characterized in that cutting off the power supply is the multitool commutator, and wherein a cutter is a mains switch, and all the other cutter two contacts are connected with field winding or armature two ends respectively, and back reversal connection field winding or armature are used to cut off the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039416 CN1825746A (en) | 2006-04-07 | 2006-04-07 | Series electric machine with electric braking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039416 CN1825746A (en) | 2006-04-07 | 2006-04-07 | Series electric machine with electric braking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1825746A true CN1825746A (en) | 2006-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610039416 Pending CN1825746A (en) | 2006-04-07 | 2006-04-07 | Series electric machine with electric braking function |
Country Status (1)
| Country | Link |
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| CN (1) | CN1825746A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192003A (en) * | 2014-07-28 | 2014-12-10 | 厦门纵横通电动车有限公司 | Anti-slip device for electric sightseeing vehicle |
| CN105656359A (en) * | 2014-11-11 | 2016-06-08 | 南京德朔实业有限公司 | Electric tool and brake circuit suitable for motor |
| CN108418476A (en) * | 2018-04-28 | 2018-08-17 | 上海特波电机有限公司 | Direct current generator fast dynamic braking device |
| CN108605667A (en) * | 2016-12-06 | 2018-10-02 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN110265248A (en) * | 2019-07-18 | 2019-09-20 | 科都电气有限公司 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
| CN113030731A (en) * | 2021-05-26 | 2021-06-25 | 四川大学 | Reverse connection injection type electronic locked rotor device |
-
2006
- 2006-04-07 CN CN 200610039416 patent/CN1825746A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192003A (en) * | 2014-07-28 | 2014-12-10 | 厦门纵横通电动车有限公司 | Anti-slip device for electric sightseeing vehicle |
| CN105656359A (en) * | 2014-11-11 | 2016-06-08 | 南京德朔实业有限公司 | Electric tool and brake circuit suitable for motor |
| CN105656359B (en) * | 2014-11-11 | 2018-06-26 | 南京德朔实业有限公司 | Electric tool and the braking circuit suitable for motor |
| CN108605667A (en) * | 2016-12-06 | 2018-10-02 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN108418476A (en) * | 2018-04-28 | 2018-08-17 | 上海特波电机有限公司 | Direct current generator fast dynamic braking device |
| CN108418476B (en) * | 2018-04-28 | 2023-12-29 | 上海特波电机有限公司 | Quick energy consumption braking device for DC motor |
| CN110265248A (en) * | 2019-07-18 | 2019-09-20 | 科都电气有限公司 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
| CN113030731A (en) * | 2021-05-26 | 2021-06-25 | 四川大学 | Reverse connection injection type electronic locked rotor device |
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| C06 | Publication | ||
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Addressee: Sun Heming Document name: Notice of first review |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |