CN108050083A - A kind of band protection and the water pump driving circuit of diagnostic function - Google Patents
A kind of band protection and the water pump driving circuit of diagnostic function Download PDFInfo
- Publication number
- CN108050083A CN108050083A CN201711288336.2A CN201711288336A CN108050083A CN 108050083 A CN108050083 A CN 108050083A CN 201711288336 A CN201711288336 A CN 201711288336A CN 108050083 A CN108050083 A CN 108050083A
- Authority
- CN
- China
- Prior art keywords
- circuit
- water pump
- protection
- diagnosis
- diagnostic function
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to water pump actuation techniques fields; specifically disclose a kind of band protection and the water pump driving circuit of diagnostic function; plant-grid connection circuit equipped with access power supply; it is additionally provided with driving outlet line, protection circuit and diagnosis circuit; the driving outlet line connects the plant-grid connection circuit, the protection circuit and the diagnosis circuit, the plant-grid connection circuit and is also connected with the diagnosis circuit.A kind of band protection provided by the invention and the water pump driving circuit of diagnostic function, realize：Cost is reduced, is built using conventional component, saves the design cost of Jin $1；Diagnostic function, diagnosis circuit output diagnostic signal to MCU master control circuits complete detection；Power source short-circuit protection, when drive output carries out short circuit to power supply, circuit can complete shut-off protection；Circuit multiplexer in addition to being used as adjustable speed water pump driving circuit, also has the function of the multipurposes such as low level request, high level detection, the low side driving of low current, PWM input detections.
Description
Technical field
The present invention relates to water pump actuation techniques fields more particularly to a kind of protection of band and the water pump of diagnostic function to drive electricity
Road.
Background technology
The development of the development of automobile industry, particularly new energy electric motor vehicle so that more and more pumps are applied to automobile
Industry.In vehicle complete vehicle system, these pumps are typically used in automobile cooling system and air pressurizing unit such as cooling down battery
And for automobiles heat circulating systems such as auxiliary internal heating.
As one kind in numerous pumps, adjustable speed water pump in automobile air conditioner control system more to be related to use, but existing
The low side driving circuit generally existing of adjustable speed water pump integrates IC design costs height, circuit without diagnosis, circuit port without power supply
The problems such as short-circuit protection function, circuit function reusability be low.Since manufacturer integrates water pump low side driving circuit the electricity inside IC
Road displaying is incomplete, and designer cannot cause integrated with these according to the external circuit of the circuit appropriate mix inside IC
When the driving circuit of IC designs is used for the control of adjustable speed water pump, there is the problem of wave distortion, be mainly reflected in pwm signal
Duty cycle changes.
The content of the invention
The technical issues of present invention provides a kind of protection of band and the water pump driving circuit of diagnostic function, solution be, it is existing can
It is short without power supply without diagnosis, circuit port that the low side driving circuit generally existing of adjustable speed water pump integrates IC design costs height, circuit
Road defencive function, circuit function reusability are low, distorted signals.
For solution more than technical problem, the present invention provides a kind of band protection and the water pump driving circuit of diagnostic function, is equipped with
The plant-grid connection circuit of power supply is accessed, is additionally provided with driving outlet line, protection circuit and diagnosis circuit, the driving output
Plant-grid connection circuit, the protection circuit and the diagnosis circuit, the plant-grid connection circuit are also connected with institute described in connection
State diagnosis circuit；Speed governing initial signal is from the driving outlet line access, by the protection circuit and the diagnosis circuit
Synergistic effect, from the drive output output speed governing final signal of the driving outlet line and from the diagnosis circuit
Diagnosis output terminal export corresponding diagnostic signal.
Specifically, the plant-grid connection circuit is equipped with pull-up resistor and electrostatic protection capacitance, one end of the pull-up resistor
The power supply is accessed, the other end connects one end, the driving outlet line and the diagnosis circuit of electrostatic protection capacitance,
The other end ground connection of the electrostatic protection capacitance.
Specifically, the driving outlet line is equipped with the first divider resistance, the second divider resistance and the first triode, described
The speed governing initial signal is accessed in one end of first divider resistance, and the other end connects the base stage of first triode and described the
One end of two divider resistances, the other end of second divider resistance are grounded, described in the collector conduct of first triode
Drive output connects the other end of the pull-up resistor, and the emitter of first triode connects the protection circuit.
Specifically, the protection circuit is equipped with the second triode and first resistor, and the collector of second triode connects
Connect the base stage of first triode, the base stage of second triode connects the emitter of first triode and described the
One end of one resistance, the emitter of second triode are grounded with the other end of the first resistor.
Specifically, the diagnosis circuit is equipped with the 3rd divider resistance, the 4th divider resistance, second resistance, voltage-stabiliser tube, filtering
Capacitance；3rd divider resistance and the 4th divider resistance are sequentially connected in series between the other end and ground of the pull-up resistor, institute
Voltage-stabiliser tube differential concatenation is stated at the both ends of the 4th divider resistance, the second resistance is in parallel after connecting with the filter capacitor
Between the negative pole end and positive terminal of the voltage-stabiliser tube, the common connection end of the second resistance and the filter capacitor is as institute
State diagnosis output terminal.
Specifically, the power supply is automobile batteries supply voltage, and power supply voltage range is 9~16V.
Specifically, speed governing initial signal is the adjustable pwm signal of duty cycle of setpoint frequency.
Specifically, the speed governing final signal and the speed governing initial signal are identical frequency, the PWM of same duty cycle believes
Number.
Specifically, the PWM interfaces of the drive output connection water pump, the diagnosis output terminal connect the water pump
The diagnostics port of MCU master control circuits, the speed governing initial signal are generated and exported by the MCU master control circuits.
A kind of band protection provided by the invention and the water pump driving circuit of diagnostic function, realize：
1. reduce cost：It is built using conventional component, saves the design cost of Jin $1；
2. diagnostic function：Circuit output diagnostic signal is diagnosed to MCU master control circuits, completes detection；
3. power source short-circuit protection：When drive output carries out short circuit to power supply, circuit can complete shut-off protection；
4. circuit multiplexer：In addition to being used as adjustable speed water pump driving circuit, also with low level request, high level detection,
The multipurposes functions such as the low side driving of low current, PWM input detections.
Description of the drawings
Fig. 1 is that a kind of band protection provided in an embodiment of the present invention is connected with the component of the water pump driving circuit of diagnostic function
Figure；
It is adjustable that Fig. 2 is that the water pump driving circuit of a kind of band protection provided in an embodiment of the present invention and diagnostic function is linked
The interface simplification figure of fast water pump.
Specific embodiment
Embodiments of the present invention are specifically illustrated below in conjunction with the accompanying drawings, embodiment is only given for illustrative purposes,
Limitation of the invention can not be interpreted as, type selecting and value size and attached drawing including component are only preferred embodiment, only
For reference with illustrate to use, the limitation to scope of patent protection of the present invention is not formed, because not departing from spirit of the invention and model
On the basis of enclosing, many changes can be carried out to the present invention.
If by a kind of band protection provided in an embodiment of the present invention and water pump driving circuit preferably first device of diagnostic function
Part is built, then as shown in Figure 1.In the present embodiment, a kind of band protection and the water pump driving circuit of diagnostic function, are equipped with
The plant-grid connection circuit 1 of power supply Battery is accessed, is additionally provided with driving outlet line 2, protection circuit 3 and diagnosis circuit 4,
The driving outlet line 2 connects the plant-grid connection circuit 1, the protection circuit 3 and the diagnosis circuit 4, the power supply
Line attachment 1 is also connected with the diagnosis circuit 4；Speed governing initial signal is accessed from the driving outlet line 2, by the protection
The synergistic effect of circuit 3 and the diagnosis circuit 4 exports speed governing most from the drive output OUT1 of the driving outlet line 2
Whole signal and the corresponding diagnostic signal of diagnosis output terminal OUT2 outputs from the diagnosis circuit 4.
Need to illustrate is：
The plant-grid connection circuit 1 is equipped with pull-up resistor R1 and electrostatic protection capacitance C1, one end of the pull-up resistor R1
Access the power supply Battery, one end, the driving outlet line 2 and the institute of other end connection electrostatic protection capacitance C1
State diagnosis circuit 4, the other end ground connection of the electrostatic protection capacitance C1.Pull-up resistor R1 generates the diagnosis output terminal OUT2
On high level, this pull-up resistor R1 may be on water pump internal circuit, it is also possible to need pre- in the driving circuit as shown in Figure 2
It stays；
The driving outlet line 2 is equipped with the first divider resistance R2, the second divider resistance R3 and the first triode Q1, described
The speed governing initial signal is accessed in one end of first divider resistance R2, the other end connect the base stage B of the first triode Q1 with
One end of the second divider resistance R3, the other end ground connection of the second divider resistance R3, the collection of the first triode Q1
The other ends of the electrode C as the diagnosis output terminal OUT2 connections pull-up resistor R1, the transmitting of the first triode Q1
The pole E connections protection circuit 3；
The protection circuit 3 is equipped with the second triode Q2 and first resistor R4 (over-current detection resistance), the two or three pole
The base stage B of collector C connections the first triode Q1 of pipe Q2, the base stage B connections described first of the second triode Q2
The emitter E of triode Q1 and one end of the first resistor R4, the emitter E of the second triode Q2 and the described first electricity
Hinder the other end ground connection of R4；
The diagnosis circuit 4 is equipped with the 3rd divider resistance R5, the 4th divider resistance R6, second resistance R7, voltage-stabiliser tube D1, filter
Ripple capacitance C2；The 3rd divider resistance R5 and the 4th divider resistance R6 be sequentially connected in series the other end in the pull-up resistor R1 with
Between ground, the voltage-stabiliser tube D1 differential concatenations are in the both ends of the 4th divider resistance R6, the second resistance R7 and the filter
It is connected in parallel on after ripple capacitance C2 series connection between the negative pole end and positive terminal of the voltage-stabiliser tube D1, the second resistance R7 and the filtering
The common connection end of capacitance C2 is as the diagnosis output terminal OUT2；
The power supply Battery is automobile batteries supply voltage, and power supply voltage range is 9~16V；
The speed governing initial signal is the adjustable pwm signal of duty cycle of setpoint frequency；
The speed governing final signal and the speed governing initial signal are identical frequency, the pwm signal of same duty cycle, low electricity
Flat ＜ 1.5V, high level are about the automobile batteries supply voltage；
The PWM interfaces of the drive output OUT1 connections water pump, the diagnosis output terminal OUT2 connections water pump
The diagnostics port of MCU master control circuits.The signal type of the drive output OUT1 outputs and diagnosis output terminal OUT2's are all PWM
Signal.The signal low level of the drive output OUT1 outputs is close to 0V, and high level is about 12V.The diagnosis output terminal
The signal low level of OUT2 outputs is close to 0V, and high level is about 5V.The speed governing initial signal by the water pump MCU master controls
Circuit is generated and exported, and specifically, is inputted from the MCU control signals IN.
When the PWM speed governing initial signals of MCU master control circuits output 5V high level, the 5V voltages are defeated after R1 and R2 partial pressures
Enter the base stage B to Q1 so that PN junction turns between the BE of Q1, and Q1 is operated in saturation state, at this time (low side) diagnosis output terminal OUT2
Low level is exported, diagnosis output terminal OUT2 also exports a low level；If drive output OUT1 and power supply short circuit or drive
Dynamic output terminal OUT1 input currents are excessive, then Q1 is operated in amplification region, and the PN junction between collector C and emitter E will be because big
Electric current flows through and damage of generating heat, but due to the presence of its emitter E first resistor R4, this high current forms electricity after flowing through the resistance
Pressure loading is on the base stage B of Q2 so that the collector C of Q2 is turned on over the ground, and Q1 is because base stage B is pulled low cut-off conducting, so as to protect
Driving circuit.
When MCU master control circuits export low level PWM speed governing initial signal, Q1 is operated in cut-off state, due to driving
The pull-up of outlet line 2 drives outlet line 2 to export one to be approximately equal to confession there are one pull-up resistor R1 to power supply Battery
The high level of power supply Battery, the high level is in the about 5V of output one after R5 and R6 partial pressures, voltage-stabiliser tube D1 voltage stabilizings
High level to diagnosis output terminal OUT2.
A kind of band protection provided in this embodiment and the water pump driving circuit of diagnostic function are suitable for adjustable speed water pump.Referring to
Fig. 2 is the adjustable speed water pump that a kind of band provided in an embodiment of the present invention is protected and the water pump driving circuit of diagnostic function is linked
Interface simplification figure.In fig. 2, UPump ports are cut-off supply voltage input terminal, and PWM port is defeated for driving described in Fig. 1
Outlet OUT1, GND are ground terminal.
In the case of water pump normal power supply, if its PWM port receives a PWM speed governing initial signal, water pump
It starts running, the pattern and rotating speed of work are respectively depending on the frequency and duty cycle of the pwm signal of input, while pump operation goes out
During existing failure, which is output to the diagnosis output terminal OUT2, the diagnosis output terminal by water pump from its PWM port
OUT2 output diagnostic signals are given to the MCU master control circuits.
A kind of band protection provided in an embodiment of the present invention and the water pump driving circuit of diagnostic function, realize：
1. reduce cost：It is built using conventional component, saves the design cost of Jin $1；
2. diagnostic function：It diagnoses circuit 4 and exports diagnostic signal to MCU master control circuits, complete detection；
3. power source short-circuit protection：When diagnosing output terminal OUT2 to power supply progress short circuit, circuit can complete shut-off protection；
4. circuit multiplexer：In addition to being used as adjustable speed water pump driving circuit, also with low level request, high level detection,
The multipurposes functions such as the low side driving of low current, PWM input detections.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (9)
1. with the water pump driving circuit of diagnostic function, the plant-grid connection circuit equipped with access power supply is special for a kind of band protection
Sign is, is additionally provided with driving outlet line, protection circuit and diagnosis circuit, and the driving outlet line connects the plant-grid connection
Circuit, the protection circuit and the diagnosis circuit, the plant-grid connection circuit are also connected with the diagnosis circuit；Speed governing is initially believed
Number from it is described driving outlet line access, by the protection circuit with it is described diagnosis circuit synergistic effect, from the driving
The drive output of outlet line exports speed governing final signal and is exported from the diagnosis output terminal for diagnosing circuit corresponding
Diagnostic signal.
2. a kind of band protection as described in claim 1 and the water pump driving circuit of diagnostic function, it is characterised in that：The power supply
Line attachment is equipped with pull-up resistor and electrostatic protection capacitance, and the power supply, the other end are accessed in one end of the pull-up resistor
Connect one end of electrostatic protection capacitance, driving outlet line and the diagnosis circuit, the electrostatic protection capacitance it is another
End ground connection.
3. a kind of band protection as claimed in claim 2 and the water pump driving circuit of diagnostic function, it is characterised in that：The driving
Outlet line is equipped with the first divider resistance, the second divider resistance and the first triode, and one end of first divider resistance is accessed
The speed governing initial signal, the other end connects the base stage of first triode and one end of second divider resistance, described
The other end ground connection of second divider resistance, the collector of first triode connect the pull-up as the drive output
The other end of resistance, the emitter of first triode connect the protection circuit.
4. a kind of band protection as claimed in claim 3 and the water pump driving circuit of diagnostic function, it is characterised in that：The protection
Circuit is equipped with the second triode and first resistor, and the collector of second triode connects the base stage of first triode,
The emitter of base stage connection first triode of second triode and one end of the first resistor, the described 2nd 3
The emitter of pole pipe and the other end of the first resistor are grounded.
5. a kind of band protection as claimed in claim 4 and the water pump driving circuit of diagnostic function, it is characterised in that：The diagnosis
Circuit is equipped with the 3rd divider resistance, the 4th divider resistance, second resistance, voltage-stabiliser tube, filter capacitor；3rd divider resistance with
4th divider resistance is sequentially connected in series between the other end and ground of the pull-up resistor, and the voltage-stabiliser tube differential concatenation is described
The both ends of four divider resistances, the second resistance be connected in parallel on after connecting with the filter capacitor negative pole end of the voltage-stabiliser tube with just
Between extreme, the common connection end of the second resistance and the filter capacitor is as the diagnosis output terminal.
6. a kind of band protection as claimed in claim 5 and the water pump driving circuit of diagnostic function, it is characterised in that：The power supply
Power supply is automobile batteries supply voltage, and power supply voltage range is 9~16V.
7. a kind of band protection as claimed in claim 6 and the water pump driving circuit of diagnostic function, it is characterised in that：Speed governing is initial
Signal is the adjustable pwm signal of duty cycle of setpoint frequency.
8. a kind of band protection as claimed in claim 7 and the water pump driving circuit of diagnostic function, it is characterised in that：The speed governing
Final signal and the speed governing initial signal are identical frequency, the pwm signal of same duty cycle.
9. a kind of band protection as described in claim 1 and the water pump driving circuit of diagnostic function, it is characterised in that：The driving
Output terminal connects the PWM interfaces of water pump, and the diagnosis output terminal connects the diagnostics port of the MCU master control circuits of the water pump, described
Speed governing initial signal is generated and exported by the MCU master control circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711288336.2A CN108050083A (en) | 2017-12-07 | 2017-12-07 | A kind of band protection and the water pump driving circuit of diagnostic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711288336.2A CN108050083A (en) | 2017-12-07 | 2017-12-07 | A kind of band protection and the water pump driving circuit of diagnostic function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108050083A true CN108050083A (en) | 2018-05-18 |
Family
ID=62122400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711288336.2A Pending CN108050083A (en) | 2017-12-07 | 2017-12-07 | A kind of band protection and the water pump driving circuit of diagnostic function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108050083A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061616A (en) * | 2019-05-15 | 2019-07-26 | 上海艾为电子技术股份有限公司 | Power-switching circuit with short-circuit protection |
| CN110636664A (en) * | 2019-08-02 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Indicator lamp driving circuit with diagnosis function |
| CN111255728A (en) * | 2020-03-20 | 2020-06-09 | 江铃汽车股份有限公司 | Blower driving circuit with diagnosis and protection functions |
| CN114228731A (en) * | 2021-11-30 | 2022-03-25 | 江铃汽车股份有限公司 | Water pump fault diagnosis method and system, storage medium and electric automobile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006025547A (en) * | 2004-07-08 | 2006-01-26 | Toyota Motor Corp | Switching power supply device |
| CN103176070A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Fault acquisition circuit and fault diagnosis circuit provided with same |
| CN105840541A (en) * | 2016-05-04 | 2016-08-10 | 宁波普瑞均胜汽车电子有限公司 | Circuit for outputting enable signals of air blower |
| CN206024155U (en) * | 2016-07-05 | 2017-03-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle hazard warning light status switch |
| CN106842019A (en) * | 2016-12-23 | 2017-06-13 | 惠州市德赛西威汽车电子股份有限公司 | A kind of inner-outer circulation motor open detection circuit of air-conditioner controller |
| CN107420337A (en) * | 2017-07-24 | 2017-12-01 | 温州长江汽车电子有限公司 | A kind of control circuit of blower with diagnostic function |
-
2017
- 2017-12-07 CN CN201711288336.2A patent/CN108050083A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006025547A (en) * | 2004-07-08 | 2006-01-26 | Toyota Motor Corp | Switching power supply device |
| CN103176070A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Fault acquisition circuit and fault diagnosis circuit provided with same |
| CN105840541A (en) * | 2016-05-04 | 2016-08-10 | 宁波普瑞均胜汽车电子有限公司 | Circuit for outputting enable signals of air blower |
| CN206024155U (en) * | 2016-07-05 | 2017-03-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle hazard warning light status switch |
| CN106842019A (en) * | 2016-12-23 | 2017-06-13 | 惠州市德赛西威汽车电子股份有限公司 | A kind of inner-outer circulation motor open detection circuit of air-conditioner controller |
| CN107420337A (en) * | 2017-07-24 | 2017-12-01 | 温州长江汽车电子有限公司 | A kind of control circuit of blower with diagnostic function |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061616A (en) * | 2019-05-15 | 2019-07-26 | 上海艾为电子技术股份有限公司 | Power-switching circuit with short-circuit protection |
| CN110636664A (en) * | 2019-08-02 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Indicator lamp driving circuit with diagnosis function |
| CN111255728A (en) * | 2020-03-20 | 2020-06-09 | 江铃汽车股份有限公司 | Blower driving circuit with diagnosis and protection functions |
| CN114228731A (en) * | 2021-11-30 | 2022-03-25 | 江铃汽车股份有限公司 | Water pump fault diagnosis method and system, storage medium and electric automobile |
| CN114228731B (en) * | 2021-11-30 | 2024-02-02 | 江铃汽车股份有限公司 | Water pump fault diagnosis method, system, storage medium and electric automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108050083A (en) | A kind of band protection and the water pump driving circuit of diagnostic function | |
| CN207573327U (en) | A kind of analog signal detection circuit of vehicle-mounted multichannel button | |
| CN108896861A (en) | A kind of detection circuit and electric car in high-voltage interlocking circuit | |
| CN102353825B (en) | Resistor sampling isolation current detection circuit | |
| CN102594234B (en) | Speed regulation driving integrated circuit for single-phase brushless direct current fan | |
| CN107420337B (en) | A kind of control circuit of blower with diagnostic function | |
| CN207215883U (en) | A kind of current detection circuit based on current transformer | |
| CN105197001A (en) | Vacuum pump controller of electric vehicle | |
| CN104044464A (en) | Sensor power supply output protection isolation circuit | |
| CN106505923B (en) | Power device control and overheat protector system and method for electric machine controller | |
| CN208651111U (en) | A kind of low cost water pump control circuit | |
| CN203595560U (en) | Temperature detection circuit | |
| CN106842019B (en) | A kind of inner-outer circulation motor open detection circuit of air-conditioner controller | |
| CN106059513B (en) | Direct current detection protects circuit and the class-D amplifier using it | |
| CN205958177U (en) | Vehicle air conditioner's pressure test device and car | |
| CN203554408U (en) | Driving circuit with BOOT pin functioning as IO port | |
| CN205248763U (en) | Switch short -circuit protection circuit | |
| CN209728467U (en) | Analogue signal acquisition circuit and entire car controller based on entire car controller | |
| CN209248288U (en) | Flash driving circuit for the diagnosis of new energy vehicle controller power adjustable band | |
| CN106771777B (en) | Inverter driving signal detection device of frequency converter | |
| CN205959011U (en) | Motor magnetic encoder | |
| CN204458062U (en) | A kind of petrolic signal processing module and control system | |
| CN105974992B (en) | Pwm control signal transmission method and device in a kind of strong electromagnetic interference environment | |
| CN211235982U (en) | Voltage detection device applied to motor and motor control system | |
| CN207503027U (en) | A kind of Portable automobile engine crankshaft cam axle sensor signal source device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |