CN2704967Y - Pulsewidth speed regulating and electric brake of DC motor - Google Patents
Pulsewidth speed regulating and electric brake of DC motor Download PDFInfo
- Publication number
- CN2704967Y CN2704967Y CNU2004200088616U CN200420008861U CN2704967Y CN 2704967 Y CN2704967 Y CN 2704967Y CN U2004200088616 U CNU2004200088616 U CN U2004200088616U CN 200420008861 U CN200420008861 U CN 200420008861U CN 2704967 Y CN2704967 Y CN 2704967Y
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- power device
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- excitation winding
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- Control Of Direct Current Motors (AREA)
Abstract
The utility model discloses a pulse-width speed regulating and electric braking device of DC motor, mainly applied in the electric drive field of speed regulating and electric braking of DC motor. The device comprises a motor rotor winding (4) and an excitation winding (10), a power device (11), a DC contactor (3), a DC switch (1), a condenser (2) and three diodes, two resistors, etc. The utility model is characterized in that the diodes (7) are connected between the motor rotor winding and the excitation winding, etc. The utility model, through controlling the on and off of the DC switch (1) and the DC contactor (3), determines the motor positions in the speed governing state or the electric braking state; through controlling the pulse-width of the power device (11), regulates the operating speed of the motor or the size of the brake force; the utility model is an electric control device of stably governing speed and combining with non-contact electric braking. The utility model is suitable for the situations which needs stably govern speed or frequently brake of electric bicycle, trolley bus, the assembly line of conveying belt and mechanical device, etc.
Description
Technical field the utility model relates to the stepless speed regulation and the electric braking of DC motor, be mainly used in speed regulation and the electric braking of direct current machine when Electric Traction, as electric bicycle, trolley bus, electric locomotive and other use direct current machine occasions.
Background technology DC motor in the prior art when Electric Traction more to be adopted the phased copped waves of silicon controlled or contraryly leads the chopping regulating speed mode, not only speed governing less stable, and also out of control easily when input supply voltage hangs down; Simultaneously mechanical brake modes that adopt realize braking by the intense attrition between bremsbelage and the brake wheel more, and not only the wearing and tearing of brake block and brake wheel are big, and often produce bigger brake noise when braking at a high speed.
Summary of the invention the utility model is at above-mentioned deficiency, and the DC motor speed-regulating and the electric braking device of stepless smoothly adjustable-speed of a kind of pulse-width modulation type and non-contact type electric braking are provided.
Realize above-mentioned purpose of the present utility model with design in the following manner:
This DC motor pulse wide modulation and electric braking device, the rotor winding and the excitation winding that comprise DC motor, power device, D.C. contactor, dc switch, capacitor, three diodes, two resistors etc., it is characterized in that being connected to diode (7) between the negative terminal of rotor winding and the excitation winding, be connected to D.C. contactor between the contact of the anode of rotor winding and excitation winding and diode (7), be connected to power device between the other end of motor excitation winding and the input power supply N end, be connected to diode (9) between the anode of contact between power device and excitation winding and rotor winding, and be connected to resistance (8) between the contact of resistance (5) and diode (6), the other end of resistance (5) and the negative terminal of rotor winding join, the other end of diode (6) joins with the N end of input power supply, also is connected to dc switch between the anode and the input power supply P of rotor winding hold, and be connected to capacitor etc. between the input power supply N end.When dc switch is closed, D.C. contactor can not adhesive, input dc power from P end through dc switch, rotor, diode (7), excitation winding, power device N end to input dc power, by regulating the width ratio of power break-over of device pulse, flow through the size of current of DC motor rotor and excitation winding with regard to may command, realize the purpose of motor stepless speed control.When motor need be braked, disconnect dc switch, closed D.C. contactor, because of motor still in high speed rotating, rotor is under the remanent magnetism effect of excitation winding, produce the generating effect, being electric current gets back to the rotor negative terminal from flow through D.C. contactor, excitation winding, two resistors of rotor anode, and excitation winding produces bigger magnetic field under this function of current, make the rotor generation current bigger, this electric current makes rotor produce certain braking action under the magnetic Damping field action through two resistance; At this moment, power controlling break-over of device again, originally will be through the electric current of resistor by power device and a bypass diode, the electric current that flows through rotor is bigger, thereby produce bigger damping force, like this, by regulating the width ratio of power break-over of device pulse, with regard to the size of scalable rotor damping force, realize the purpose of controlled electric braking.
Advantage of the present utility model is that motor speed is to regulate by the width ratio of power device conducting pulse, and power device is operated in conducting or cut-off state, and not only efficient height, and speed regulation is very level and smooth; Motor is that speed governing or braking only need can realize by the break-make conversion of dc switch and D.C. contactor; During motor braking, be that rotor itself is subjected to electromagnetic damping power realization electric braking, significantly reduced the abrasion of friction brake parts.Therefore, this direct current machine pulse wide modulation and electric braking device are a kind of efficient, advanced means that stepless speed control combines with the non-contact type electric braking, be very suitable for adopting DC motor to need the occasion of frequent speed governing or brake, as the speed regulation and the braking of trolley bus, electric bicycle, electric locomotive, conveyer belt, plant equipment etc.
Appended drawings has provided the electrical schematic diagram of this utility model, further specifies as follows below in conjunction with accompanying drawing:
Accompanying drawing is a structure principle chart of the present utility model, comprises dc switch 1, capacitor 2, D.C. contactor 3, rotor winding 4, resistor 5, diode 6, diode 7, resistor 8, diode 9, excitation winding 10, power device 11 etc.Be connected to diode 7 between the negative terminal of rotor winding 4 and the excitation winding 10, cross-over connection has D.C. contactor 3 between the contact of the anode of rotor winding 4 and excitation winding 10 and diode 7, be connected to power device 11 between the other end of excitation winding 10 and the input power supply N end, on the contact that power device 11 and excitation winding are 10 also tandem resistance 8, diode 9 anodes, the anode of the negative terminal of diode 9 and rotor winding 4, D.C. contactor 3, capacitor 2, dc switch 1 tandem together, the negative terminal of the other end of resistance 8 and diode 6, resistance 5 tandems together, the negative terminal of the other end of resistance 5 and rotor winding 4, the anode tandem of diode 7, the negative terminal of diode 6 and the N end of importing power supply, power device 11, capacitor 2 phase tandems.
The aforesaid circuit of embodiment, dc switch 1 logically can not be closed simultaneously with D.C. contactor 3, but can disconnect simultaneously.When dc switch 1 closure and D.C. contactor 3 when disconnecting, motor is in running status: input dc power enters rotor 4, diode 7, motor excitation winding 10, power device 11 negative terminal to input DC power through P end, the conducting pulse duration of power device 11 is than regulating arbitrarily, the conducting peak pulse duration is more little, the electric current that flows through rotor 4 and excitation winding 10 is more little, and rotating speed of motor is just slow more; The conducting pulse duration ratio that progressively adds high power device 11, the electric current that flows through motor also progressively increases, and motor speed also progressively strengthens thereupon.Otherwise rotating speed just progressively reduces, and regulates the conducting peak pulse duration smoothly, and the speed of motor will smooth change, realizes the purpose of smoothly adjustable-speed.Because the operating state of power device 11 has only conducting or ends, during conducting, though it is very big to flow through the electric current of power device 11, the voltage at power device 11 two ends is low-down; When power device 11 ended, though it is very high to be added in the voltage at power device 11 two ends, the electric current that flows through was zero, so the loss on power device 11 is very little.When dc switch 1 disconnect and also motor because inertia during still in high speed rotating such as closed D.C. contactor 3, motor will enter the electric braking state: rotor winding 4 is in high speed rotating, because the existence of remanent magnetism, rotor winding 4 produces electromotive force with regard to inevitably cutting the magnetic line of force of remanent magnetism, the positive and negative terminal of this electromotive force is just in time consistent with the positive and negative terminal of motor, the electric current that this electromotive force produces is got back to the negative terminal of rotor winding 4 through anode, D.C. contactor 3, motor excitation winding 10, resistance 8, the resistance 5 of rotor winding 4, promptly forms a current loop; This electric current flows through excitation winding 10, can produce the magnetic field identical with remanence direction, this magnetic field further encourages rotor 4 to produce bigger magnetic force line cutting again, rotor 4 just induces bigger electromotive force, produce bigger electric current, so the positive feedback that produces makes rotor 4 be among the stronger magnetic field rapidly and produce stronger braking force under the damping action of big electric current; At this moment, if power device 11 conductings, resistance 8 is by power device 11 and diode 6 bypasses, the back-emf that rotor 4 produces will drop on the resistance 5 through power device 11 and 6 of diodes, thereby can produce bigger electric current, this electric current strengthens with the increasing of the pulsewidth conduction ratio of power device 11, like this, conducting peak pulse duration by regulating power device 11 is realized the purpose of controlled electric braking with regard to the size of may command electric braking force.
Claims (2)
1. DC motor pulse wide modulation and electric braking device, comprise dc switch (1), capacitor (2), D.C. contactor (3), rotor armature winding (4), resistor (5), diode (6), diode (7), resistor (8), diode (9), excitation winding (10), power device (11) etc., it is characterized in that being connected to diode (7) between the negative terminal of rotor winding (4) and the excitation winding (10), cross-over connection has D.C. contactor (3) between the contact of the anode of rotor winding (4) and excitation winding (10) and diode (7) negative terminal, be connected to power device (11) between the other end of excitation winding (10) and the input power supply N end, gone back tandem resistor (8) on the contact between power device (11) and the excitation winding (10), the anode of diode (9), the anode of the negative terminal of diode (9) and rotor winding (4), D.C. contactor (3), capacitor (2), dc switch (1) tandem together, the negative terminal of the other end of resistor (8) and diode (6), resistor (5) tandem together, the negative terminal of the other end of resistor (5) and rotor winding (4), the anode tandem of diode (7), the anode of diode (6) and the N end of importing power supply, power device (11), capacitor (2) phase tandem.
2. electric electromechanics according to claim 1 braking and pulse wide modulation device, its feature is that also described power device (11) comprises IGBT, power field effect pipe etc., at the two ends of this device and be connected to diode; Power device (11) is operated in conducting or cut-off state, opens the speed governing or the braking force of the width ratio realization motor of pulse by control and regulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200088616U CN2704967Y (en) | 2004-03-18 | 2004-03-18 | Pulsewidth speed regulating and electric brake of DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200088616U CN2704967Y (en) | 2004-03-18 | 2004-03-18 | Pulsewidth speed regulating and electric brake of DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2704967Y true CN2704967Y (en) | 2005-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200088616U Expired - Fee Related CN2704967Y (en) | 2004-03-18 | 2004-03-18 | Pulsewidth speed regulating and electric brake of DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2704967Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860308A (en) * | 2010-05-11 | 2010-10-13 | 沈阳新阳光机电科技有限公司 | Safe and reliable dragging and braking conversion device for DC motor armature winding |
| CN101379691B (en) * | 2006-01-04 | 2012-04-11 | 罗伯特·博世有限公司 | Systems and methods of monitoring a motor load |
| CN113489419A (en) * | 2021-06-30 | 2021-10-08 | 南京航空航天大学 | Electro-magnetic doubly salient motor driving and charging integrated system and multi-mode energy feedback control method thereof |
-
2004
- 2004-03-18 CN CNU2004200088616U patent/CN2704967Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379691B (en) * | 2006-01-04 | 2012-04-11 | 罗伯特·博世有限公司 | Systems and methods of monitoring a motor load |
| CN101860308A (en) * | 2010-05-11 | 2010-10-13 | 沈阳新阳光机电科技有限公司 | Safe and reliable dragging and braking conversion device for DC motor armature winding |
| CN113489419A (en) * | 2021-06-30 | 2021-10-08 | 南京航空航天大学 | Electro-magnetic doubly salient motor driving and charging integrated system and multi-mode energy feedback control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Xunyue Document name: Notification of Termination of Patent Right |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |