CN202168027U - Direct current motor controller based on metal oxide semiconductor field effect transistor (MOSFET) - Google Patents
Direct current motor controller based on metal oxide semiconductor field effect transistor (MOSFET) Download PDFInfo
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- CN202168027U CN202168027U CN2011202652285U CN201120265228U CN202168027U CN 202168027 U CN202168027 U CN 202168027U CN 2011202652285 U CN2011202652285 U CN 2011202652285U CN 201120265228 U CN201120265228 U CN 201120265228U CN 202168027 U CN202168027 U CN 202168027U
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Abstract
The utility model provides a direct current motor controller based on a metal oxide semiconductor field effect transistor (MOSFET), which belongs to the technical field of direct current motor control and solves the problem of follow current loss of armature current of a motor in a driving control system during operation of the direct current motor in the prior art. The direct current motor controller comprises a pulse width modulation (PWM) driving control circuit and an H type bipolar reciprocal circuit composed of large-power controllable switch tubes. The input end of the direct current motor controller is connected with a power supply, and the output end of the direct current motor controller is connected with the direct current motor. The direct current motor controller is characterized in that the controllable switch tubes are MOSEFT tubes, a follow current diode is connected between a drain and a source of each MOSFET tube, and a grid of a metal oxide semiconductor (MOS) tube is connected with the PWM driving control circuit. The direct current motor controller adopts the MOSFET to conduct reverse synchronous follow current, can perform all functions of parallel combination of the original switch tube and the diode, and can reduce follow current loss of the armature current of the motor in the driving control system.
Description
Technical field
The utility model belongs to the DC MOTOR CONTROL technical field, relates to a kind of DC motor controller based on MOSFET.
Background technology
Electric machine controller itself is a kind of power conversion device, and self need consume certain electric energy, and the autophage electrical power is big more, and the efficient of controller will be low more.The power consumption of controller is mainly from fly-wheel diode, and this part power consumption is difficult to reduce, and the afterflow power consumption that produces has accounted for the sizable ratio of entire controller power consumption.
For the power consumption that reduces controller and under situation such as overload, stall, make it be difficult for taking place cause thermal damage, present way mainly is exactly to lean on to select for use large power semiconductor device or increasing controller area of dissipation to solve.But do not have real reduction power consumption like this, increased controller cost and volume weight on the contrary.So at some volume and weights to electric machine controller the occasion of strict demand is arranged, this method is just more powerless
Existing Chinese patent document discloses a kind of DC motor controller [patent No.: ZL200920159788.5]; Disclosed dc point glue machine controller employing smart power switch and dead band, synchronization control circuit are with big electric current, high-power MOSFET FET packet design; Excitation winding control with full-bridge is controlled the measure that combines with the armature power of half-bridge; Power control is reliable; Though this patent adopts smart power switch and big electric current, high-power MOSFET FET to solve the not high shortcoming of power output in the existing patent documentation, does not consider to put in place for the afterflow loss problem of armature electric current in the driving control system.
Summary of the invention
There are the problems referred to above in the utility model to existing technology; A kind of DC motor controller based on MOSFET has been proposed; This DC motor controller adopts MOSFET to carry out reverse synchronous freewheeling; Not only can carry out the repertoire of the parallelly connected combination of former switching tube, and can also reduce the afterflow loss of armature electric current in the driving control system with diode.
The utility model is realized through following technical proposal: a kind of DC motor controller based on MOSFET; Comprise PWM Drive and Control Circuit and the H type bipolar system reciprocal circuit of being made up of high-power controlled tr tube, its input is connected with power supply, and output is connected on the direct current machine; It is characterized in that; Described controlled tr tube is the MOSFET pipe, is connected with fly-wheel diode between the drain electrode of each MOSFET pipe and the source electrode, and the grid of metal-oxide-semiconductor is connected with described PWM Drive and Control Circuit.
The PWM Drive and Control Circuit is through the grid voltage of control metal-oxide-semiconductor; Control the conduction break-make of the H type bipolar system reciprocal circuit of being made up of high-power controlled tr tube, the drain electrode of each MOSFET pipe is connected to power supply and source ground forms closed loop, and promptly the drain-source interpolar adds positive supply; When the PWM Drive and Control Circuit is not given the grid making alive of metal-oxide-semiconductor; Be that the grid voltage between source electrodes is zero, no current flows through between drain electrode that this moment, each MOSFET managed and the source electrode, and the MOSFET pipe ends; When the grid making alive of PWM Drive and Control Circuit to metal-oxide-semiconductor, promptly the grid voltage between source electrodes is greater than zero, and this moment, the drain electrode and the source electrode of each MOSFET pipe conducted electricity, and MOSFET manages conducting.The PWM Drive and Control Circuit is through the MOSFET pipe break-make in the control H type bipolar system reciprocal circuit, the operation of the direct current machine that comes to connect on the control output end.Between the MOSFET drain-source utmost point fly-wheel diode is arranged, MOSFET pipe from be conducting to end moment fly-wheel diode and the synchronous freewheeling of leakage, source electrode backward current carry out afterflow simultaneously, improved the afterflow efficient of DC motor controller.
In the above-mentioned DC motor controller based on MOSFET, the anode of said fly-wheel diode is connected with the source electrode of MOSFET pipe, and the negative electrode of fly-wheel diode is connected with the drain electrode of MOSFET pipe.Guarantee the afterflow path of fly-wheel diode and MOSFET pipe leakage, source electrode backward current the afterflow path in the same way, thereby the realization synchronous freewheeling.
In above-mentioned DC motor controller based on MOSFET; Described MOSFET pipe has four; Be respectively metal-oxide-semiconductor V1, metal-oxide-semiconductor V2, metal-oxide-semiconductor V3 and metal-oxide-semiconductor V4, the drain electrode of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V3 is connected in positive source jointly, and the source electrode of metal-oxide-semiconductor V2 and metal-oxide-semiconductor V4 is connected in power cathode jointly; The drain electrode of the source electrode of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V2 is connected and as output terminals A, and the drain electrode of the source electrode of metal-oxide-semiconductor V3 and metal-oxide-semiconductor V4 is connected and as output B.Direct current machine is connected in output terminals A, B, and switching to direct current machine through the break-make of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 path and metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 path provides power supply.
In the above-mentioned DC motor controller based on MOSFET, described metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 are one group, and metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 are one group, other one group of disconnection when one group of conducting.Control by the PWM Drive and Control Circuit, metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 conducting, metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 break off, and then electric current is supplied with direct current machine from the power supply metal-oxide-semiconductor V1 that flows through, and the output end current of direct current machine forms closed-loop path through metal-oxide-semiconductor V4.
In the above-mentioned DC motor controller based on MOSFET, described MOSFET pipe is the N channel enhancement.Just there is conducting channel greater than zero the time in the grid voltage of N channel enhancement MOSFET pipe.
Prior art is compared, and the DC motor controller of this MOSFET has the following advantages:
1, the utility model is drain electrode, the source electrode voltage-current characteristic of utilizing the good two-way raceway groove conductive characteristic of MOSFET and being in third quadrant, has realized the synchronous freewheeling of diode and leakage, source electrode backward current, has reached the purpose that improves controller afterflow efficient.
2, the DC motor controller of the utility model adopts MOSFET to carry out reverse synchronous freewheeling, not only can carry out the repertoire of the parallelly connected combination with diode of former switching tube, and can also reduce the afterflow loss of armature electric current in the driving control system.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure, 1, power supply; 2, motor; 3, PWM Drive and Control Circuit; G, grid; D, leakage collection; S, Yuan Ji; DS, the drain-source utmost point; GS, grid source electrode; Control signal Vi1; Control signal Vi2; Output terminals A; Output B; Metal-oxide-semiconductor V1; Metal-oxide-semiconductor V2; Metal-oxide-semiconductor V3; Metal-oxide-semiconductor V4; Fly-wheel diode O1, O2, O3, O4;
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technical scheme of the utility model is done further to describe, but the utility model is not limited to these embodiment.
As shown in Figure 1; Should be based on the DC motor controller of MOSFET; Comprise PWM Drive and Control Circuit 3 and the H type bipolar system reciprocal circuit of being made up of high-power controlled tr tube, its input is connected with power supply 1, and output is connected on the direct current machine 2; Controlled tr tube is the MOSFET pipe; Be connected with fly-wheel diode O1, O2, O3, O4 between the drain D of each MOSFET pipe and the source S, the anode of fly-wheel diode O1, O2, O3, O4 is connected with the source S of MOSFET pipe, and the negative electrode of fly-wheel diode O1, O2, O3, O4 is connected with the drain D of MOSFET pipe.The MOSFET pipe is the N channel enhancement, and the grid G of MOSFET pipe is connected with PWM Drive and Control Circuit 3.The MOSFET pipe has four; Be respectively metal-oxide-semiconductor V1, metal-oxide-semiconductor V2, metal-oxide-semiconductor V3 and metal-oxide-semiconductor V4; The drain D of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V3 is connected in power supply 1 positive pole jointly; The source S of metal-oxide-semiconductor V2 and metal-oxide-semiconductor V4 is connected in power supply 1 negative pole jointly, and the drain D of the source S of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V2 is connected and as output terminals A, and the drain D of the source S of metal-oxide-semiconductor V3 and metal-oxide-semiconductor V4 is connected and as output B.Metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 are one group, and metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 are one group, other one group of disconnection when one group of conducting.
PWM Drive and Control Circuit 3 is through the grid G voltage of control metal-oxide-semiconductor; Control the conduction break-make of the H type bipolar system reciprocal circuit of being made up of high-power controlled tr tube, the drain D of each MOSFET pipe is connected to power supply 1 and forms closed loop with source S ground connection, promptly adds positive supply between drain-source utmost point DS; When PWM Drive and Control Circuit 3 is not given the grid G making alive of metal-oxide-semiconductor; Be that voltage is zero between grid source electrode GS, no current flows through between drain D that this moment, MOSFET managed and the source S, and the MOSFET pipe ends; When the grid G making alive of PWM Drive and Control Circuit to metal-oxide-semiconductor, promptly voltage is greater than zero between grid source electrode GS, and this moment, the drain D and the source S of MOSFET pipe were conducted electricity, and MOSFET manages conducting.
PWM Drive and Control Circuit 3 is through the MOSFET pipe break-make in the control H type bipolar system reciprocal circuit, the operation of the direct current machine 2 that comes to connect on the control output end.Between each the MOSFET pipe drain-source utmost point DS fly-wheel diode O1, O2, O3, O4 are arranged; MOSFET pipe from by the end of the moment of conducting corresponding fly-wheel diode and drain-source utmost point DS carry out synchronous reverse afterflow; Because of the conducting resistance of MOSFET pipe is very little, even electric current is bigger than normal, the tube voltage drop of synchronous freewheeling MOSFET pipe is still very low; Thereby reduce the afterflow loss largely, improved the afterflow efficient of direct current machine 2 controllers.Just there is conducting channel greater than zero the time in the grid G voltage of N channel enhancement MOSFET pipe.
Direct current machine 2 is connected in output terminals A, B, and switching to direct current machine 2 through the break-make of metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 path and metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 path provides power supply.In each PWM control cycle, control the opposite control signal of output two-way high-low level by PWM Drive and Control Circuit 3; When control signal Vi1 high level, metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 conducting, control signal Vi2 is a low level simultaneously; Metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 break off; Then electric current is supplied with direct current machine 2 from power supply through metal-oxide-semiconductor V1, and the output end current of direct current machine 2 forms closed-loop path through metal-oxide-semiconductor V4, and the armature winding of motor 2 is accepted the forward voltage from the output terminals A to B; When control signal Vi1 is low level; Metal-oxide-semiconductor V1 and metal-oxide-semiconductor V4 end, and control signal Vi2 is a high level, metal-oxide-semiconductor V2 and metal-oxide-semiconductor V3 conducting; Then electric current is supplied with direct current machine 2 from the power supply 1 metal-oxide-semiconductor V3 that flows through; The output end current of direct current machine 2 forms closed-loop path through metal-oxide-semiconductor V2, and the armature winding of motor 2 is accepted the reverse voltage from B to A, and motor 2 is accomplished bipolar rotation.
Then when metal-oxide-semiconductor V1 turn-offs; Trigger the closed conducting of metal-oxide-semiconductor V2, the fly-wheel diode O2 that is connected between metal-oxide-semiconductor V2 internal switch pipe afterflow this moment and metal-oxide-semiconductor V2 grid source electrode GS carries out reverse afterflow synchronously, turn-offs the moment of metal-oxide-semiconductor V2 closure at metal-oxide-semiconductor V1; Because it is little that the MOSFET pipe has conducting resistance; Grid G resistance little with the good characteristics of switching characteristic, flow through direct current machine 2 of the synchronous freewheeling electric current of metal-oxide-semiconductor V2 forms closed-loop path with metal-oxide-semiconductor V4, is used for discharging the reverse voltage of metal-oxide-semiconductor V2; The conducting resistance of managing because of MOSFET is very little; Even electric current is bigger than normal, the tube voltage drop of synchronous freewheeling MOSFET pipe is still very low, thereby has reduced the afterflow loss of motor 2 armature supplys in the DC motor controller.
Metal-oxide-semiconductor V1 in the DC motor controller circuit of this MOSFET is connected with fly-wheel diode O4 is corresponding with metal-oxide-semiconductor V4 with fly-wheel diode O3 with fly-wheel diode O2, metal-oxide-semiconductor V3 with fly-wheel diode O1, metal-oxide-semiconductor V2.When above-mentioned metal-oxide-semiconductor V1 turn-offs; Trigger the closed conducting of metal-oxide-semiconductor V2; The fly-wheel diode O2 that is connected between metal-oxide-semiconductor V2 internal switch pipe afterflow this moment and metal-oxide-semiconductor V2 grid source electrode GS carries out reverse afterflow synchronously, also can form in the moment of the conducting of corresponding other metal-oxide-semiconductor and carry out reverse afterflow synchronously.According to the very little characteristic of conducting resistance of MOSFET pipe, even electric current is bigger than normal, the tube voltage drop of synchronous freewheeling MOSFET pipe is still very low, thereby under the switch instances of any break-make, has all reduced the afterflow loss of motor 2 armature supplys in the DC motor controller.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as power supply 1, motor 2, PWM Drive and Control Circuit 3, grid G, leakage collection D, source collection S, drain-source utmost point DS, grid source electrode GS, control signal Vi1, control signal Vi2, output terminals A, output B, metal-oxide-semiconductor V1, metal-oxide-semiconductor V2, metal-oxide-semiconductor V3, metal-oxide-semiconductor V4, fly-wheel diode O1, O2, O3, O4 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (5)
1. DC motor controller based on MOSFET; Comprise PWM Drive and Control Circuit (3) and the H type bipolar system reciprocal circuit of being made up of high-power controlled tr tube, its input is connected with power supply (1), and output is connected on the direct current machine; It is characterized in that; Described controlled tr tube is the MOSFET pipe, is connected with fly-wheel diode (O1, O2, O3, O4) between the drain electrode (D) of each MOSFET pipe and the source electrode (S), and the grid of metal-oxide-semiconductor (G) is connected with described PWM Drive and Control Circuit (3).
2. the DC motor controller based on MOSFET according to claim 1; It is characterized in that; The anode of described fly-wheel diode (O1, O2, O3, O4) is connected with the source electrode (S) of MOSFET pipe, and the negative electrode of fly-wheel diode (O1, O2, O3, O4) is connected with the drain electrode (D) of MOSFET pipe.
3. the DC motor controller based on MOSFET according to claim 2; It is characterized in that; Described MOSFET pipe has four; Be respectively metal-oxide-semiconductor (V1), metal-oxide-semiconductor (V2), metal-oxide-semiconductor (V3) and metal-oxide-semiconductor (V4), the drain electrode (D) of metal-oxide-semiconductor (V1) and metal-oxide-semiconductor (V3) is connected in power supply (1) positive pole jointly, and the source electrode (S) of metal-oxide-semiconductor (V2) and metal-oxide-semiconductor (V4) is connected in power supply (1) negative pole jointly; The source electrode (S) of metal-oxide-semiconductor (V1) and the drain electrode (D) of metal-oxide-semiconductor (V2) is connected and as output (A), the drain electrode (D) of the source electrode of metal-oxide-semiconductor (V3) and metal-oxide-semiconductor (V4) are connected and as output (B).
4. the DC motor controller based on MOSFET according to claim 3 is characterized in that, described metal-oxide-semiconductor (V1) and metal-oxide-semiconductor (V4) are one group, and metal-oxide-semiconductor (V2) and metal-oxide-semiconductor (V3) are one group, other one group of disconnection when one group of conducting.
5. according to claim 1 or 2 or 3 or 4 described DC motor controllers, it is characterized in that described MOSFET pipe is the N channel enhancement based on MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202652285U CN202168027U (en) | 2011-07-26 | 2011-07-26 | Direct current motor controller based on metal oxide semiconductor field effect transistor (MOSFET) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202652285U CN202168027U (en) | 2011-07-26 | 2011-07-26 | Direct current motor controller based on metal oxide semiconductor field effect transistor (MOSFET) |
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| CN202168027U true CN202168027U (en) | 2012-03-14 |
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| CN2011202652285U Expired - Fee Related CN202168027U (en) | 2011-07-26 | 2011-07-26 | Direct current motor controller based on metal oxide semiconductor field effect transistor (MOSFET) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702668A (en) * | 2016-03-03 | 2016-06-22 | 成都芯源系统有限公司 | Synchronous switching converter and integrated semiconductor switching device for synchronous switching converter |
| CN109581912A (en) * | 2018-11-20 | 2019-04-05 | 南京华士电子科技有限公司 | The application and its control method of redundancy contactless control switch, control switch |
| CN110112966A (en) * | 2018-01-29 | 2019-08-09 | 郑州宇通客车股份有限公司 | A kind of DC motor positive and negative rotation and speed-regulating control circuit and a kind of direct current motor system |
-
2011
- 2011-07-26 CN CN2011202652285U patent/CN202168027U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702668A (en) * | 2016-03-03 | 2016-06-22 | 成都芯源系统有限公司 | Synchronous switching converter and integrated semiconductor switching device for synchronous switching converter |
| CN105702668B (en) * | 2016-03-03 | 2018-06-22 | 成都芯源系统有限公司 | Synchronous switching converter and integrated semiconductor switching device for synchronous switching converter |
| CN110112966A (en) * | 2018-01-29 | 2019-08-09 | 郑州宇通客车股份有限公司 | A kind of DC motor positive and negative rotation and speed-regulating control circuit and a kind of direct current motor system |
| CN109581912A (en) * | 2018-11-20 | 2019-04-05 | 南京华士电子科技有限公司 | The application and its control method of redundancy contactless control switch, control switch |
| CN109581912B (en) * | 2018-11-20 | 2024-02-27 | 南京华士电子科技有限公司 | Control method of redundant contactless logic control unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20130726 |