CN108390598A - A kind of electric machine control system of non-isolated current detecting - Google Patents
A kind of electric machine control system of non-isolated current detecting Download PDFInfo
- Publication number
- CN108390598A CN108390598A CN201810095194.6A CN201810095194A CN108390598A CN 108390598 A CN108390598 A CN 108390598A CN 201810095194 A CN201810095194 A CN 201810095194A CN 108390598 A CN108390598 A CN 108390598A
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- connect
- circuit
- rectifier diode
- rectifier
- motor
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention relates to a kind of electric machine control systems of non-isolated current detecting, including：Power input, switch, rectifier circuit, motor, sample circuit, current limiting element, reduction voltage circuit and micro-control unit, the power input is connect with the input terminal of the switch, the output end of the switch is connect with the rectifier circuit, one end of the motor is connect with the rectifier circuit, the other end of the motor is connect with the sample circuit, the sample circuit is connect with the rectifier circuit and the micro-control unit respectively, one end of the current limiting element is connect with the first input end of the reduction voltage circuit, the other end is connect with the power input, second input terminal of the reduction voltage circuit connect with the rectifier circuit and is total to ground, the output end of the reduction voltage circuit is connect with the micro-control unit.The present invention ensures that motor is controllable while ensuring that non-isolated electric current accurately samples.
Description
Technical field
The present invention relates to a kind of electric machine control system, the electric machine control system of specifically a kind of non-isolated current detecting.
Background technology
With the improvement of people's environmental awareness, household kitchen garbage disposer is more and more universal, garbage disposer is logical
Motor-driven blade is crossed, the rubbish such as kitchen material object residue are blended, then pour sewer；Direct current generator is because its is small, torque
Greatly, the advantages that at low cost and control method is simple is widely used in household kitchen garbage disposer.
The brief circuit of the electric machine control system of household kitchen rubbish is as depicted in figs. 1 and 2.MCU assists electricity by AC/DC
Source is connect with power input, and AC/DC accessory power supplys are powered using isolated power supply to MCU.When working on power, MCU is monitored in real time
The electric current of motor realizes the functions such as over current of motor protection, rotation-clogging protection and idling automatic stopping by analyzing real time data.
But isolated power supply cost is higher, to reduce production cost, more and more manufacturers consider accessory power supply part
It is changed to non-isolated power supply.But if accessory power supply part is changed to non-isolated power supply, in order to obtain accurately sampling electricity
Flow signal, it is necessary to consider by the power supply circuit of accessory power supply part and direct current generator altogether, and need ensure motor operation when can
Control.
Invention content
The technical problem to be solved in the present invention is to provide a kind of electric machine control systems of non-isolated current detecting, can be true
While protecting non-isolated electric current and accurately sample, ensure that motor is controllable.
The technical solution adopted by the present invention is：A kind of electric machine control system of non-isolated current detecting, including：Power input
End, switch, rectifier circuit, motor, sample circuit, current limiting element, reduction voltage circuit and micro-control unit, the power input
Connect with the input terminal of the switch, the output end of the switch is connect with the rectifier circuit, one end of the motor with
Rectifier circuit connection, the other end of the motor are connect with the sample circuit, the sample circuit respectively with it is described
Rectifier circuit and micro-control unit connection, one end of the current limiting element and the first input end of the reduction voltage circuit connect
It connects, the other end is connect with the power input, and the second input terminal of the reduction voltage circuit is connect simultaneously with the rectifier circuit
Altogether, the output end of the reduction voltage circuit is connect with the micro-control unit, and the current limiting element only allows electric current at work
The reduction voltage circuit is flowed to via the current limiting element, the micro-control unit controls institute when the electric current for detecting motor is excessive
Switch is stated to disconnect.
Further, the power input includes firewire connecting pin and zero curve connecting pin, and the switch is arranged described
Between firewire connecting pin and the rectifier circuit；Optionally, the power input includes firewire connecting pin and zero curve connection
End, the switch are arranged between the zero curve connecting pin and the rectifier circuit.
Further, the rectifier circuit includes the first rectifier diode, the second rectifier diode, two pole of third rectification
The cathode of pipe, the 4th rectifier diode, the cathode of first rectifier diode and second rectifier diode and the electricity
Machine connects, and the anode of first rectifier diode and the cathode of the output end of the switch and the third rectifier diode connect
It connects, the anode of second rectifier diode is connect with the cathode of the zero curve connecting pin and the 4th rectifier diode, institute
The anode and the anode of the 4th rectifier diode and the second input terminal of the reduction voltage circuit for stating third rectifier diode connect
It connects and is total to ground.
Further, the sample circuit includes a sampling resistor and an ADC converters, described sampling resistor one end and institute
Motor connection is stated, the other end is connect with the anode of positive, described 4th rectifier diode of the third rectifier diode, described
ADC converters are in parallel with the sampling resistor, and are connect with the micro-control unit.
Further, the electric machine control system further includes capacitance, one end of the capacitance and two pole of the first rectification
The cathode of the cathode of pipe and second rectifier diode connects, the other end of the capacitance and the third rectifier diode
The anode connection of positive and described 4th rectifier diode.
Further, the electric machine control system further includes warning device, the warning device and the micro-control unit
Connection, the micro-control unit control the switch when the electric current for detecting motor is excessive and disconnect, and control the alarm dress
It sets and sends out alarm.
Further, the current limiting element is diode.
Further, the switch is relay switch.
The beneficial effects of the invention are as follows：The present invention uses non-isolated accessory power supply to power for micro-control unit, and is utilized
Partial rectification diode in rectifier circuit provides current path, while ensuring that non-isolated electric current accurately samples, ensures
Motor is controllable.
Description of the drawings
Fig. 1 show the structural schematic diagram of the electric machine control system of existing isolation current detecting；
Fig. 2 show the circuit diagram of the electric machine control system of existing isolation current detecting；
Fig. 3 show a kind of structural schematic diagram of the electric machine control system of non-isolated current detecting provided by the invention；
Fig. 4 show a kind of circuit diagram of the electric machine control system of non-isolated current detecting provided by the invention.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
The electric machine control system of the non-isolated current detecting of the present invention is introduced below in conjunction with the accompanying drawings.
Fig. 3 and Fig. 4 is please referred to, is a kind of electric machine control system of non-isolated current detecting provided by the invention, including：Electricity
Source input terminal 1, switch 2, rectifier circuit 3, motor 4, sample circuit 5, micro-control unit 6, current limiting element 7, reduction voltage circuit 8.
The power input 1 is connect with the input terminal of the switch 2, and the output end of the switch 2 connects with the rectifier circuit 3
It connecing, one end of the motor 4 is connect with the rectifier circuit 3, and the other end of the motor 4 is connect with the sample circuit 5,
The sample circuit 5 is connect with the rectifier circuit 3 and the micro-control unit 6 respectively, one end of the current limiting element 6 with
The first input end of the reduction voltage circuit 8 connects, and the other end is connect with the power input 1, and the second of the reduction voltage circuit 8
Input terminal connect with the rectifier circuit 3 and is total to ground, and the output end of the reduction voltage circuit 8 is connect with the micro-control unit 6.
Further, the power input 1 includes firewire connecting pin 11 and zero curve connecting pin 12, and the switch 2 is arranged
Between the firewire connecting pin 11 and the rectifier circuit 3.
Optionally, the power input 1 includes firewire connecting pin 11 and zero curve connecting pin 12, and the setting of the switch 2 exists
Between the zero curve connecting pin 12 and the rectifier circuit 3.
Further, the rectifier circuit 3 is whole including the first rectifier diode D1, the second rectifier diode D2, third
Flow diode D3, the 4th rectifier diode D4, the cathode of the first rectifier diode D1 and the second rectifier diode D2
Cathode connect with the motor 4, anode and the output end of the switch 2 and the third of the first rectifier diode D1
The cathode of rectifier diode D3 connects, anode and the zero curve connecting pin 12 and the described 4th of the second rectifier diode D2
The cathode of rectifier diode D4 connects, the anode of positive, the described 4th rectifier diode D4 of the third rectifier diode D3
It is connect with the second input terminal of the reduction voltage circuit and is total to ground.
Further, the sample circuit 5 includes a sampling resistor R1 and an ADC converters 51, the sampling resistor R1
One end is connect with the motor 4, and the other end is with positive, the described 4th rectifier diode D4's of the third rectifier diode D3
Anode connection, the input terminal of the ADC converters 51 are connect with the both ends of the sampling resistor R1 respectively, the ADC converters
51 output end is connect with the micro-control unit 6.
Further, the electric machine control system of the non-isolated current detecting further includes a capacitance C1, the capacitance C1's
One end is connect with the cathode of the motor 4, the cathode of the first rectifier diode D1 and the second rectifier diode D2, institute
The other end for stating capacitance C1 is connect with the anode of the positive and described 4th rectifier diode D4 of the third rectifier diode D3.
Further, the electric machine control system of the non-isolated current detecting further includes a warning device 9, the alarm dress
It sets 9 to connect with the micro-control unit 6, described in the micro-control unit 6 is controlled when detecting that the electric current of the motor 4 is excessive
Switch 2 disconnects, and controls the warning device 9 and send out alarm.
Further, in the present embodiment, the current limiting element 7 is diode.In other alternative-embodiments, current limliting
Element 7 can also be other existing electronic components for controlling electric current one-way conduction.
Further, in the present embodiment, the switch 2 is relay switch.In other alternative-embodiments, it switchs
Can also be that the existing other types for control circuit open/close states switch.
The electric machine control system operation principle of the non-isolated current detecting of the present invention is as follows：
It is illustrated in conjunction with Fig. 4 by taking household kitchen garbage disposer as an example.The power input 1 powers on, described
In the closure state, the motor 4 receives the full-wave rectification electric signal after 3 rectification of the rectifier circuit to switch 2, drives knife
Piece blends rubbish.Meanwhile mains electricity signal via the firewire connecting pin 11, the current limiting element 7, the reduction voltage circuit 8,
It is back to the zero curve connecting pin 12 after the 4th rectifier diode D4 and forms electric power loop, to be the micro-control unit
6 provide electric signal.Wherein, the function of the current limiting element 7 is limitation electric current one-way conduction, i.e., only allows electric current via the limit
Fluid element 7 flows to the reduction voltage circuit 8, and via being back to the zero curve connecting pin 12 after the 4th rectifier diode D4,
Without allowing electric current reverse-conducting.That is, the reception of the micro-control unit 6 is halfwave rectifier electric signal.Due to described
The power consumption of micro-control unit 6 is relatively low, and halfwave rectifier electric signal is sufficient for the work requirements of the micro-control unit 6, to really
Non-isolated electric current is protected accurately to sample.The micro-control unit 6 can monitoring be passed through in real time by the sample circuit 5 as a result,
The electric current of the motor 4.
When garbage disposer blocks, causes the rotating speed of blade slack-off or even static, pass through the electric current meeting of the motor 4
Increase and overrate, the micro-control unit 6 detect the abnormal state of the motor 4, institute by the sample circuit 5
It states micro-control unit 6 and controls the disconnection of the switch 2, so that the motor 4 is stopped, and control the warning device 9 and send out police
Report.The micro-control unit 6 realizes overcurrent protection, rotation-clogging protection and the zero load of the motor 4 by analyzing real time data
The functions such as autostop.
Further, after the switch 2 disconnects, mains electricity signal is still via the firewire connecting pin 11, the current limliting
It is back to the zero curve connecting pin 12 after element 7, the reduction voltage circuit 8, the 4th rectifier diode D4 and forms electric power loop,
Therefore, the micro-control unit 6 is maintained to normal operating conditions.At this time if closure switch by force, sample detecting is still
It is so able to detect that abnormality, the micro-control unit 6 can again disconnect switch 2, only releases the abnormal work of the motor 4
After the state of work, the electric machine control system of entire non-isolated current detecting could restore the state of normal work.
The present invention uses non-isolated accessory power supply to power for micro-control unit, and it is whole that the part in rectifier circuit is utilized
It flows diode and current path is provided, while providing current loop for accessory power supply, the full-wave rectification for also remaining motor supplies
Circuit.The electric machine control system of the present invention ensures that motor is controllable while ensuring that non-isolated electric current accurately samples.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of electric machine control system of non-isolated current detecting, which is characterized in that including：Power input, switch, rectifier bridge
Circuit, motor, sample circuit, current limiting element, reduction voltage circuit and micro-control unit, the power input are defeated with the switch
Enter end connection, the output end of the switch is connect with the rectifier circuit, one end of the motor and the rectifier circuit
Connection, the other end of the motor connect with the sample circuit, the sample circuit respectively with the rectifier circuit and institute
Micro-control unit connection is stated, one end of the current limiting element is connect with the first input end of the reduction voltage circuit, the other end and institute
Power input connection is stated, the second input terminal of the reduction voltage circuit connect with the rectifier circuit and is total to ground, the decompression
The output end of circuit is connect with the micro-control unit, and the current limiting element only allows electric current via current limliting member at work
Part flows to the reduction voltage circuit, and the micro-control unit controls the switch when the electric current for detecting motor is excessive and disconnects.
2. the electric machine control system of non-isolated current detecting as described in claim 1, which is characterized in that the power input
Including firewire connecting pin and zero curve connecting pin, the switch is arranged between the firewire connecting pin and the rectifier circuit.
3. the electric machine control system of non-isolated current detecting as described in claim 1, which is characterized in that the power input
Including firewire connecting pin and zero curve connecting pin, the switch is arranged between the zero curve connecting pin and the rectifier circuit.
4. the electric machine control system of non-isolated current detecting as claimed in claim 2, which is characterized in that the rectifier circuit
Including the first rectifier diode, the second rectifier diode, third rectifier diode, the 4th rectifier diode, first rectification
The cathode of the cathode of diode and second rectifier diode is connect with the motor, the anode of first rectifier diode
It is connect with the cathode of the output end of the switch and the third rectifier diode, the anode of second rectifier diode and institute
The cathode for stating zero curve connecting pin and the 4th rectifier diode connects, and the positive and described 4th of the third rectifier diode the
The anode of rectifier diode connect with the second input terminal of the reduction voltage circuit and is total to ground.
5. the electric machine control system of non-isolated current detecting as claimed in claim 4, which is characterized in that the sample circuit packet
A sampling resistor and an ADC converters are included, described sampling resistor one end is connect with the motor, the other end and the third rectification
The anode connection of positive, described 4th rectifier diode of diode, the ADC converters are in parallel with the sampling resistor, and
It is connect with the micro-control unit.
6. the electric machine control system of non-isolated current detecting as claimed in claim 4, which is characterized in that motor control system
System further includes capacitance, one end of the capacitance and the cathode of first rectifier diode and bearing for second rectifier diode
Pole connects, and the other end of the capacitance and the anode of positive and described 4th rectifier diode of the third rectifier diode connect
It connects.
7. the electric machine control system of non-isolated current detecting as described in claim 1, which is characterized in that motor control system
System further includes warning device, and the warning device is connect with the micro-control unit, and the micro-control unit is detecting motor
Electric current it is excessive when control the switch and disconnect, and control the warning device and send out alarm.
8. the electric machine control system of non-isolated current detecting as described in claim 1, which is characterized in that the current limiting element is
Diode.
9. the electric machine control system of non-isolated current detecting as described in claim 1, which is characterized in that the switch is relay
Device switchs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095194.6A CN108390598B (en) | 2018-01-31 | 2018-01-31 | Motor control system for non-isolated current detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095194.6A CN108390598B (en) | 2018-01-31 | 2018-01-31 | Motor control system for non-isolated current detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108390598A true CN108390598A (en) | 2018-08-10 |
| CN108390598B CN108390598B (en) | 2020-05-08 |
Family
ID=63074881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810095194.6A Active CN108390598B (en) | 2018-01-31 | 2018-01-31 | Motor control system for non-isolated current detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN108390598B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006282112A (en) * | 2005-04-04 | 2006-10-19 | Sumitomonacco Materials Handling Co Ltd | Electric power steering device |
| CN205407654U (en) * | 2016-02-22 | 2016-07-27 | 广东美的生活电器制造有限公司 | Food preparation machine circuit and food preparation machine |
| CN206878734U (en) * | 2017-04-12 | 2018-01-12 | 浙江航驱汽车科技有限公司 | For there is the direct current generator current sampling device of brush EPS controllers |
-
2018
- 2018-01-31 CN CN201810095194.6A patent/CN108390598B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006282112A (en) * | 2005-04-04 | 2006-10-19 | Sumitomonacco Materials Handling Co Ltd | Electric power steering device |
| CN205407654U (en) * | 2016-02-22 | 2016-07-27 | 广东美的生活电器制造有限公司 | Food preparation machine circuit and food preparation machine |
| CN206878734U (en) * | 2017-04-12 | 2018-01-12 | 浙江航驱汽车科技有限公司 | For there is the direct current generator current sampling device of brush EPS controllers |
Non-Patent Citations (1)
| Title |
|---|
| WILMAR MARTINEZ等: "Total volume evaluation of high-power density non-isolated DC–DC converters with integrated magnetics for electric vehicles", 《IET POWER ELECTRONICS》 * |
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| Publication number | Publication date |
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| CN108390598B (en) | 2020-05-08 |
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