CN206698153U - Drive device and its power source reverse connection protection circuit - Google Patents
Drive device and its power source reverse connection protection circuit Download PDFInfo
- Publication number
- CN206698153U CN206698153U CN201720250357.4U CN201720250357U CN206698153U CN 206698153 U CN206698153 U CN 206698153U CN 201720250357 U CN201720250357 U CN 201720250357U CN 206698153 U CN206698153 U CN 206698153U
- Authority
- CN
- China
- Prior art keywords
- voltage
- relay
- power supply
- receive
- polarity
- Prior art date
- 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.)
- Expired - Fee Related
Links
Landscapes
- Inverter Devices (AREA)
Abstract
A kind of drive device and its power source reverse connection protection circuit, power source reverse connection protection circuit are applied to be electrically connected between high voltage power supply and inverter, and the high voltage power supply provides a DC voltage.Polarity detecting unit electrically connects the high voltage power supply to detect the DC voltage, and according to the polarity and the test voltage of the DC voltage, produces the detecting voltage signal that a size is relevant to the polarity of the DC voltage.Judging unit, the polarity detecting unit is electrically connected to receive the detecting voltage signal, and a judged result is obtained according to the comparison of a preset value and the size of the detecting voltage signal, and produce one according to the judged result and switch on a conducting level and one be not turned on control signal between level.Relay unit, the high voltage power supply is electrically connected to receive the DC voltage, and electrically connect the judging unit to receive the control signal, and controlled by the control signal to decide whether to export the DC voltage to the inverter.Whereby, reverse power connection defencive function can be provided to avoid inverter from burning.
Description
Technical field
The utility model is related to a kind of drive device, particularly relate to it is a kind of have reverse power connection defencive function drive device and
Its power source reverse connection protection circuit.
Background technology
The input power that prior art is applied to the inverter in drive motor is high-tension dc source, if because artificial
Or other factors cause joint reversal connection, then inverter may be caused to damage, therefore, how judge whether reversal connection is following to power supply
Research direction.
The content of the invention
The purpose of this utility model is that providing one kind judges the whether correct drive device of electric power polarity.
The utility model drive device is applied to the high voltage power supply that electrical connection one provides a DC voltage, and drives a horse
Reach, include a power source reverse connection protection circuit and an inverter.
The power source reverse connection protection circuit includes a polarity detecting unit, a judging unit and a relay unit.
The polarity detecting unit electrically connects the high voltage power supply to detect the DC voltage, and according to the polarity of the DC voltage
With test voltage, the detecting voltage signal that a size is relevant to the polarity of the DC voltage is produced.
The judging unit electrically connects the polarity detecting unit to receive the detecting voltage signal, and according to a preset value with being somebody's turn to do
The comparison for detecting the size of voltage signal obtains a judged result, and produces one according to the judged result and switch on a conducting level
And one be not turned on control signal between level.
The relay unit electrically connects the high voltage power supply to receive the DC voltage, and electrically connects the judging unit to receive this
Control signal, and controlled by the control signal to decide whether to export the DC voltage.
The inverter is electrically connected between the relay unit and the motor, and is worked as and received the direct current from the relay unit
During pressure, for driving the motor.
The utility model power source reverse connection protection circuit, suitable for being electrically connected between a high voltage power supply and an inverter, the height
Voltage source is used to provide a DC voltage, and the power source reverse connection protection circuit includes：
One polarity detecting unit, the high voltage power supply is electrically connected to detect the DC voltage, and according to the pole of the DC voltage
Property and test voltage, produce a size be relevant to the DC voltage polarity detecting voltage signal；
One judging unit, electrically connect the polarity detecting unit to receive the detecting voltage signal, and according to a preset value with
The comparison of the size of the detecting voltage signal obtains a judged result, and produces one according to the judged result and switch on conducting standard
Position and one it is not turned on control signal between level；And
One relay unit, the high voltage power supply is electrically connected to receive the DC voltage, and electrically connect the judging unit to receive
The control signal, and controlled by the control signal to decide whether to export the DC voltage to the inverter.
Drive device described in the utility model, the polarity detecting unit are opened including two inputs, a second resistance, one
Pass, one first electric capacity, one second electric capacity, one the 3rd electric capacity, a diode, a 3rd resistor and a difference amplifier.
Two inputs are electrically connected two ends of the high voltage power supply.
Second resistance has first end and one second end of a corresponding person for electrically connecting two input.
First end and one second end of the switch with second end for electrically connecting the second resistance, and controlled switch on is led
Between leading to and being not turned on.
First electric capacity has first end and one second end at second end for electrically connecting the switch.
Second electric capacity has the first end at second end for electrically connecting the switch and the second end of one first voltage of reception.
3rd electric capacity has a first end for receiving the first voltage, and a corresponding person for electrically connecting two input
Second end.
Diode has the anode and a negative electrode at second end for electrically connecting first electric capacity.
One 3rd resistor, there is the first end for the negative electrode for electrically connecting the diode, and one receives the second of the first voltage
End.
Drive device described in the utility model, the polarity detecting unit further include a difference amplifier, the differential amplification
Utensil has the non-inverting input of the first end of the electrical connection 3rd resistor, one to receive the inverting input of the first voltage,
And one provide the detecting voltage signal output end.
Drive device described in the utility model, the relay unit include a relay and a relay drive.
Relay is electrically connected between the high voltage power supply and the inverter, and it is controlled switch on conducting and between being not turned on, when leading
When logical, the DC voltage from the high voltage power supply is delivered to the inverter by the relay, and when being not turned on, the relay is then
The DC voltage from the high voltage power supply inverter is not delivered to.
Relay drive electrically connects the relay, and receives the control signal, and according to the control signal come control this after
Electrical equipment.
The beneficial effects of the utility model are：The utility model can be in the drive device mesohigh electricity of such as drive motor
Reverse power connection defencive function is provided between source and inverter to avoid inverter from burning.
Brief description of the drawings
Other features and effect of the present utility model, will clearly it be presented in the embodiment with reference to schema, wherein：
Fig. 1 is a circuit diagram of an embodiment of the drive device of the utility model tool reverse power connection defencive function；
Fig. 2 is a semaphore mapping of the embodiment；And
Fig. 3 is another semaphore mapping of the embodiment.
Embodiment
Before the utility model is described in detail, it shall be noted that in the following description content, similar element is with phase
With numbering represent.
Refering to Fig. 1, an embodiment of the drive device of the utility model tool reverse power connection defencive function, suitable for electrical connection
One high voltage power supply 1, high voltage power supply 1 has two joints for being used to provide a DC voltage, and drives a motor 4, and the driving
Device includes a power source reverse connection protection circuit 2, an inverter 3 and a DC capacitor Cdc.
The power source reverse connection protection circuit 2 includes a polarity detecting unit 21, a relay unit 23 and a judging unit 22.
Polarity detecting unit 21 electrically connects the high voltage power supply 1 to detect the DC voltage, and according to the pole of the DC voltage
Property with the test voltage, produce a size be relevant to the DC voltage polarity detecting voltage signal.The polarity detecting unit
21 include two input i, a diode D, one switch S, a second resistance R2, one first electric capacity C1, a 3rd resistor R3,
One second electric capacity C2, one the 3rd electric capacity C3 and a difference amplifier 5.
Two input i are electrically connected two ends of the high voltage power supply 1.Second resistance has one to electrically connect two input
A corresponding person first end and one second end.First end and one of the switch with second end for electrically connecting the second resistance
Second end, and controlled switch on conducting and between being not turned on.First electric capacity has the first of second end for electrically connecting the switch
End and one second end.Second electric capacity have one electrically connect the switch the second end first end and one receive a first voltage (
The present embodiment is ground connection GND, and voltage quasi position is the second end 0).3rd electric capacity has the first end for receiving the first voltage, and
One electrically connects the second end of a corresponding person of two input.Diode has second end for electrically connecting first electric capacity
Anode and a negative electrode.3rd resistor has the first end for the negative electrode for electrically connecting the diode, and one receives the of the first voltage
Two ends.Difference amplifier 5 have the non-inverting input (+) of a first end for electrically connecting 3rd resistor R3, one receive this
The inverting input (-) of one voltage, and one provide the detecting voltage signal output end.
Judging unit 22 electrically connects the polarity detecting unit 21 to receive the detecting voltage signal, and according to a preset value with
The comparison of the size of the detecting voltage signal obtains a judged result, and produces one according to the judged result and switch on conducting standard
Position and one it is not turned on control signal between level.The judging unit 22 includes a comparator 6 and a Micro-processor MCV, and this compares
Device 6 has one to receive the non-inverting input (+) of the detecting voltage signal, a reception one is proportional to the critical voltage of the preset value
Inverting input (-), and one provide one output output end.Micro-processor MCV electrically connect the output end of the comparator 6 with
Receive the output of the comparator 6, and a control signal is produced according to the output of the comparator 6, it is big when the detecting voltage signal
During less than being more than the critical voltage in a scheduled time section, the control signal is in the conducting level, on the contrary, the control is believed
Number it is not turned on level in this.
Relay unit 23 electrically connects the high voltage power supply 1 to receive the DC voltage, and electrically connects the judging unit 22 to connect
Control signal CTL is received, and is controlled by control signal CTL to decide whether to export the DC voltage, the relay unit 23 wraps
Include a relay 25 and a relay drive 24.
Relay 25 is electrically connected between the high voltage power supply 1 and the inverter 3, and it is controlled switch on conducting and be not turned between,
When closed, the DC voltage from the high voltage power supply is delivered to the inverter by the relay 25, should be after when being not turned on
The DC voltage from the high voltage power supply is not then delivered to the inverter by electrical equipment.Relay drive electrically connects the relay,
And the control signal is received, and the relay is controlled according to the control signal.
Inverter is electrically connected between the relay unit and the motor, and is worked as and received the DC voltage from the relay unit
When, for driving the motor.
DC capacitor Cdc has the second end of a first end for electrically connecting the inverter and a ground connection.
As shown in Fig. 2 be the semaphore mapping of above-described embodiment, as time=10ms, and the direct current of high voltage power supply
Pressure is preset as+50V, and diode current flow, 3rd resistor R3 cross-pressure is gradually drawn high, and makes detecting voltage signal in a scheduled time
Exceed the critical voltage (this case preset threshold voltage=2V, but not limited to this) in (18ms~90ms), the output of comparator 6 turns
For high potential, a rising edge of the output of comparator 6 so that make the output control signal CTL of Micro-processor MCV for high levle (
It is exactly the conducting level that this case defines), make relay drive 24 control the relay 25 to switch to conducting, pass through the DC voltage
The inverter 3 is delivered to by the relay 25.Such as Fig. 3, as time=10ms, and the DC voltage of high voltage power supply be preset as-
50V, diode D are not turned on, and 3rd resistor R3 cross-pressure maintains 0V, and the detecting voltage signal is no more than the critical electricity
Pressure, it is all low level (what namely this case defined is not turned on level, 0V) to make the output of comparator 6 and control signal CTL, make after
Electric drive 24 controls the relay 25 to switch to and is not turned on, and the DC voltage can not be delivered to the inverter 3.
In summary, above-described embodiment has advantages below：
1. using polarity detecting unit 21 and judging unit 22, it can determine whether out whether electric power polarity is correct, if electric power polarity
It is incorrect, forbid high voltage power supply to supply electricity to inverter 3, to avoid inverter 3 from burning.
2. it can reach difference amplifier 5 and judging unit using only the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3
22 are isolated from the detecting effect of high voltage power supply, can meet and high-voltage DC power supply both ends insulating requirements.
3. polarity detecting unit 21 and judging unit 22 can be independently of relay units 23 and DC capacitor Cdc, due to relay
Unit 23 has possessed in General System, therefore without excess loss element, so the purpose of this utility model can be reached really.
As described above, preferred embodiment only of the present utility model is real when that can not limit the utility model with this
The scope applied, i.e., all simple equivalent changes and modificationss made according to the utility model claims book and description, all
Still belong to the scope of the utility model.
Claims (8)
1. a kind of drive device for having reverse power connection defencive function, the high-tension electricity of a DC voltage is provided suitable for electrical connection one
Source, and drive a motor, it is characterised in that the drive device includes：
One power source reverse connection protection circuit, including a polarity detecting unit, a judging unit, and a relay unit,
The polarity detecting unit electrically connects the high voltage power supply to detect the DC voltage, and the polarity according to the DC voltage and survey
Voltage is tried, produces the detecting voltage signal that a size is relevant to the polarity of the DC voltage,
The judging unit electrically connects the polarity detecting unit to receive the detecting voltage signal, and according to a preset value and the detecting
The comparison of the size of voltage signal obtains a judged result, and produces one according to the judged result and switch on a conducting level and one
The control signal being not turned between level,
The relay unit electrically connects the high voltage power supply to receive the DC voltage, and electrically connects the judging unit to receive the control
Signal, and controlled by the control signal to decide whether to export the DC voltage；
And
One inverter, electrically connect between the relay unit and the motor, and work as and receive the DC voltage from the relay unit
When, for driving the motor.
2. drive device according to claim 1, it is characterised in that the polarity detecting unit includes：
Two inputs, it is electrically connected two ends of the high voltage power supply；
One second resistance, there is first end and one second end of a corresponding person for electrically connecting two input；
One switch, there is first end and one second end at second end for electrically connecting the second resistance, and controlled switch on is led
Between leading to and being not turned on；
One first electric capacity, there is first end and one second end at second end for electrically connecting the switch；
One second electric capacity, there is the first end at second end for electrically connecting the switch and the second end of one first voltage of reception；
One the 3rd electric capacity, has a first end for receiving the first voltage, and a corresponding person for electrically connecting two input
Second end；
One diode, there is the anode and a negative electrode at second end for electrically connecting first electric capacity；And
One 3rd resistor, have electrically connect the diode negative electrode first end, and one receive the first voltage the second end.
3. drive device according to claim 2, it is characterised in that the polarity detecting unit further includes：
One difference amplifier, there is the non-inverting input of a first end for electrically connecting the 3rd resistor, one to receive first electricity
The inverting input of pressure, and one provide the detecting voltage signal output end.
4. drive device according to claim 1, it is characterised in that the relay unit includes：
One relay, electrically connect between the high voltage power supply and the inverter, and it is controlled switch on conducting and between being not turned on, work as conducting
When, the DC voltage from the high voltage power supply is delivered to the inverter by the relay, and when being not turned on, the relay is then not
The DC voltage from the high voltage power supply is delivered to the inverter；And
One relay drive, the relay is electrically connected, and receive the control signal, and the relay is controlled according to the control signal
Device.
5. a kind of power source reverse connection protection circuit, suitable for being electrically connected between a high voltage power supply and an inverter, the high voltage power supply is used
In providing a DC voltage, it is characterised in that the power source reverse connection protection circuit includes：
One polarity detecting unit, electrically connect the high voltage power supply to detect the DC voltage, and according to the polarity of the DC voltage with
Test voltage, produce the detecting voltage signal that a size is relevant to the polarity of the DC voltage；
One judging unit, the polarity detecting unit is electrically connected to receive the detecting voltage signal, and detectd with this according to a preset value
The comparison for surveying the size of voltage signal obtains a judged result, and according to the judged result produce one switch on a conducting level and
One is not turned on the control signal between level；And
One relay unit, the high voltage power supply is electrically connected to receive the DC voltage, and electrically connect the judging unit to receive the control
Signal processed, and controlled by the control signal to decide whether to export the DC voltage to the inverter.
6. power source reverse connection protection circuit according to claim 5, it is characterised in that the polarity detecting unit includes：
Two inputs, it is electrically connected two ends of the high voltage power supply；
One second resistance, there is first end and one second end of a corresponding person for electrically connecting two input；
One switch, there is first end and one second end at second end for electrically connecting the second resistance, and controlled switch on is led
Between leading to and being not turned on；
One first electric capacity, there is first end and one second end at second end for electrically connecting the switch；
One second electric capacity, there is the first end at second end for electrically connecting the switch and the second end of one first voltage of reception；
One the 3rd electric capacity, has a first end for receiving the first voltage, and a corresponding person for electrically connecting two input
Second end；
One diode, there is the anode and a negative electrode at second end for electrically connecting first electric capacity；And
One 3rd resistor, have electrically connect the diode negative electrode first end, and one receive the first voltage the second end.
7. power source reverse connection protection circuit according to claim 6, it is characterised in that the polarity detecting unit further includes：
One difference amplifier, there is the non-inverting input at second end for electrically connecting the 3rd resistor, one to receive first electricity
The inverting input of pressure, and one provide the detecting voltage signal output end.
8. power source reverse connection protection circuit according to claim 5, it is characterised in that the relay unit includes：
One relay, electrically connect between the high voltage power supply and the inverter, and it is controlled switch on conducting and between being not turned on, work as conducting
When, the DC voltage from the high voltage power supply is delivered to the inverter by the relay, and when being not turned on, the relay is then not
The DC voltage from the high voltage power supply is delivered to the inverter；And
One relay drive, the relay is electrically connected, and receive the control signal, and the relay is controlled according to the control signal
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720250357.4U CN206698153U (en) | 2017-03-15 | 2017-03-15 | Drive device and its power source reverse connection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720250357.4U CN206698153U (en) | 2017-03-15 | 2017-03-15 | Drive device and its power source reverse connection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206698153U true CN206698153U (en) | 2017-12-01 |
Family
ID=60443275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720250357.4U Expired - Fee Related CN206698153U (en) | 2017-03-15 | 2017-03-15 | Drive device and its power source reverse connection protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206698153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631689A (en) * | 2017-03-15 | 2018-10-09 | 上海骐宏电驱动科技有限公司 | Driving device and its power source reverse connection protection circuit |
-
2017
- 2017-03-15 CN CN201720250357.4U patent/CN206698153U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631689A (en) * | 2017-03-15 | 2018-10-09 | 上海骐宏电驱动科技有限公司 | Driving device and its power source reverse connection protection circuit |
| CN108631689B (en) * | 2017-03-15 | 2024-04-19 | 永光鑫润(北京)电子有限责任公司 | Driving device and power supply reverse connection protection circuit thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101882879B (en) | Circuit converting constant current source to constant voltage source and light using same | |
| CN105305800B (en) | A kind of surge current suppression circuit | |
| CN204241613U (en) | A kind of load open-circuit detection circuit | |
| CN206698153U (en) | Drive device and its power source reverse connection protection circuit | |
| CN204794018U (en) | Microcomputer protection, measurement, and control device | |
| CN203377584U (en) | Three-phase non-midline phase-lack, undervoltage and overvoltage protection circuit | |
| CN108631689A (en) | Driving device and its power source reverse connection protection circuit | |
| CN203481904U (en) | Charger with battery reverse connection detection and protection functions | |
| CN205248194U (en) | Drive circuit of relay | |
| CN204061258U (en) | A kind of atmospheric pollution automatic air-exchanging circuit | |
| CN210957880U (en) | Direct current charging control guide circuit of charging pile | |
| CN211127137U (en) | Direct current power supply positive and negative polarity universal device and charging equipment | |
| CN211426729U (en) | Fire detection alarm electric quantity detection circuit and fire detection alarm | |
| CN103792452A (en) | Superimposed alternating voltage test tester for automobile low-voltage electric appliance | |
| CN203733719U (en) | Full wave resistive and capacitive voltage reduction relay drive circuit | |
| CN105992416A (en) | Electromagnetic heating control circuit and electromagnetic heating device | |
| CN207994610U (en) | A kind of robot and its motor protective circuit | |
| CN2859550Y (en) | Voltage comparator earth wire electriferous detecting device with resistor that supplies detecting signal | |
| CN110146736A (en) | Power supply zero-crossing detection circuit, motor control circuit, power supply zero-crossing detection method and motor driving method | |
| TWM549989U (en) | Drive device and its power supply reverse connection protection circuit | |
| CN209963756U (en) | Power supply reverse-plugging prevention circuit, power supply circuit and floor sweeping robot | |
| CN204465369U (en) | Circuit of power factor correction carries auxiliary power circuit and control device thereof | |
| CN219392246U (en) | AC charging pile grounding detection circuit | |
| CN206773141U (en) | A kind of circuit checker | |
| CN208094460U (en) | Width funtion direct-flow input end is switched with soft conduct electrons |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 |